int convert_eckey_to_x962_and_print(const EC_KEY* eckey, int version) {
assert(eckey);
// We don't need to manage the memory for group/point since we're using get0.
const EC_GROUP* group = EC_KEY_get0_group(eckey);
if (!group) {
fprintf(stderr, "error: EC_KEY_get0_group() failed.\n");
return 3;
}
const EC_POINT* pubkey_point = EC_KEY_get0_public_key(eckey);
if (!pubkey_point) {
fprintf(stderr, "error: EC_KEY_get0_public_key() failed.\n");
return 3;
}
size_t octets_len = 256;
unsigned char octets[256];
octets_len = EC_POINT_point2oct(group, pubkey_point,
POINT_CONVERSION_UNCOMPRESSED,
octets, octets_len, NULL);
if (0 == octets_len) {
fprintf(stderr, "error: EC_POINT_point2oct() failed.\n");
return 3;
}
if (octets_len != X962_UNCOMPRESSED_SIZE) {
fprintf(stderr, "error: EC_POINT_point2oct() produced %lu bytes.\n",
(unsigned long) octets_len);
return 3;
}
if (octets[0] != X962_UNCOMPRESSED_HEADER) {
fprintf(stderr, "error: EC_POINT_point2oct() produced compressed data.\n");
return 3;
}
int result = verify_x962_octets_are_on_p256(octets, octets_len);
if (result != 0) {
return result;
}
return print_octets(octets, octets_len, version);
}
static int pkcs11_ecdh_compute_key_common(unsigned char **out, size_t *outlen,
const EC_POINT *point, const EC_KEY *key,
struct pkcs11_key_data *pkd)
{
int rv = 0;
if(pkd != NULL) {
unsigned char oct[256];
const EC_GROUP *group = EC_KEY_get0_group(key);
size_t len = EC_POINT_point2oct(group, point, POINT_CONVERSION_UNCOMPRESSED, oct, sizeof(oct), NULL);
if(len > 0) {
CK_ECDH1_DERIVE_PARAMS params = { CKD_NULL, 0, NULL, len, oct };
CK_BBOOL ck_true = TRUE;
CK_BBOOL ck_false = FALSE;
CK_OBJECT_HANDLE derived = CK_INVALID_HANDLE;
CK_OBJECT_CLASS class = CKO_SECRET_KEY;
CK_KEY_TYPE type = CKK_GENERIC_SECRET;
CK_ATTRIBUTE template[] = {
size_t polypseud_decrypt(const polypseud_ctx *ctx, pseudonym *ep, const BIGNUM *privkey, const BIGNUM *closingkey, unsigned char **pp) {
if(EC_POINT_mul(ctx->ec_group, ep->a, NULL, ep->a, privkey, ctx->bn_ctx) == 0)
return 0;
if(EC_POINT_invert(ctx->ec_group, ep->a, ctx->bn_ctx) == 0)
return 0;
if(EC_POINT_add(ctx->ec_group, ep->a, ep->b, ep->a, ctx->bn_ctx) == 0)
return 0;
if(EC_POINT_mul(ctx->ec_group, ep->a, NULL, ep->a, closingkey, ctx->bn_ctx) == 0)
return 0;
unsigned char octstring[100];
size_t len = EC_POINT_point2oct(ctx->ec_group, ep->a, POINT_CONVERSION_UNCOMPRESSED, octstring, 100, ctx->bn_ctx);
return hash(octstring, len, pp);
}
void b58encode_address(const EC_POINT *ppoint, const EC_GROUP *pgroup, int addrtype, char *result)
{
unsigned char eckey_buf[128], *pend;
unsigned char binres[21] = {0,};
unsigned char hash1[32];
pend = eckey_buf;
EC_POINT_point2oct(pgroup,
ppoint,
POINT_CONVERSION_UNCOMPRESSED,
eckey_buf,
sizeof(eckey_buf),
NULL);
pend = eckey_buf + 0x41;
binres[0] = addrtype;
SHA256(eckey_buf, pend - eckey_buf, hash1);
RIPEMD160(hash1, sizeof(hash1), &binres[1]);
b58encode_check(binres, sizeof(binres), result);
}
void CBAddPoints(uint8_t * point1, uint8_t * point2){
// Get group
EC_GROUP * group = EC_GROUP_new_by_curve_name(NID_secp256k1);
// Get OpenSSL representations of points
EC_POINT * p1 = EC_POINT_new(group);
EC_POINT * p2 = EC_POINT_new(group);
BN_CTX * ctx = BN_CTX_new();
EC_POINT_oct2point(group, p1, point1, 33, ctx);
EC_POINT_oct2point(group, p2, point2, 33, ctx);
// Add points together
EC_POINT * result = EC_POINT_new(group);
EC_POINT_add(group, result, p1, p2, ctx);
// Free points
EC_POINT_free(p1);
EC_POINT_free(p2);
// Write result to point1
EC_POINT_point2oct(group, result, POINT_CONVERSION_COMPRESSED, point1, 33, ctx);
// Free result, group and ctx
EC_POINT_free(result);
EC_GROUP_free(group);
BN_CTX_free(ctx);
}
u2fs_rc dump_user_key(const u2fs_EC_KEY_t * key, char **output)
{
//TODO add PEM - current output is openssl octet string
if (key == NULL || output == NULL)
return U2FS_MEMORY_ERROR;
EC_GROUP *ecg = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1);
point_conversion_form_t pcf = POINT_CONVERSION_UNCOMPRESSED;
if (ecg == NULL)
return U2FS_MEMORY_ERROR;
const EC_POINT *point = EC_KEY_get0_public_key((EC_KEY *) key);
*output = malloc(U2FS_PUBLIC_KEY_LEN);
if (*output == NULL) {
EC_GROUP_free(ecg);
ecg = NULL;
return U2FS_MEMORY_ERROR;
}
if (EC_POINT_point2oct
(ecg, point, pcf, (unsigned char *) *output, U2FS_PUBLIC_KEY_LEN,
NULL) != U2FS_PUBLIC_KEY_LEN) {
free(ecg);
ecg = NULL;
free(*output);
*output = NULL;
return U2FS_CRYPTO_ERROR;
}
EC_GROUP_free(ecg);
ecg = NULL;
return U2FS_OK;
}
int main() {
srand((unsigned)time(NULL));
int i;
EC_KEY* key;
//key = EC_KEY_new_by_curve_name(415);
key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
const EC_GROUP *group = EC_KEY_get0_group(key);
if (EC_KEY_generate_key(key)==0) {
printf("Error generate key\n");
return -1;
}
unsigned char pk_b[33];
const EC_POINT *pub = EC_KEY_get0_public_key(key);
if (EC_POINT_point2oct(group, pub, POINT_CONVERSION_COMPRESSED, pk_b, 33, 0)!=33) {
printf("Error 2\n");
return -1;
}
unsigned char h1[16],h2[16];
printf("\x02");
for (i=0;i<16;i++) {
h1[i]=rand()%256;
printf("%c",h1[i]);
}
for (i=0;i<33;i++)
printf("%c",pk_b[i]);
fflush(stdout);
//get h2
for (i=0;i<16;i++)
h2[i]=rand()%256;
for (i=0;i<16;i++)
scanf("%c",&h2[i]);
//get peerpk_b
unsigned char peerpk_b[33]={2 , 30 , 25 , 50 , 17 , 242 , 232 , 55 , 157 , 18 , 106 , 115 , 214 , 193 , 192 , 39 , 207 , 226 , 184 , 216 , 244 , 147 , 111 , 188 , 125 , 230 , 38 , 125 , 231 , 50 , 56 , 152 , 148 };
for (i=0;i<33;i++)
scanf("%c",&peerpk_b[i]);
EC_POINT *peerpk = EC_POINT_new(group);
if (EC_POINT_oct2point(group, peerpk, peerpk_b, 33, 0)==0) {
printf("Error 3\n");
return -1;
}
unsigned char skey[33];
if (ECDH_compute_key(skey, 32, peerpk, key, NULL)==0) {
printf("Error 4\n");
return -1;
}
SHA512_CTX shactx;
unsigned char hash[SHA512_DIGEST_LENGTH];
SHA512_Init(&shactx);
SHA512_Update(&shactx, h2, 16);
SHA512_Update(&shactx, skey, 32);
SHA512_Update(&shactx, h1, 16);
SHA512_Final(hash, &shactx);
for (i=0;i<64;i++)
printf("%02x",hash[i]);
fflush(stdout);
struct cipher c;
c.recvfd=0;
c.sendfd=1;
for (i=0;i<16;i++)
c.sendkey[i]=hash[i];
for (i=0;i<4;i++)
c.sendiv[i]=hash[32+i];
for (i=0;i<16;i++)
c.recvkey[i]=hash[16+i];
for (i=0;i<4;i++)
c.recviv[i]=hash[36+i];
c.sendcnt=0;
c.recvcnt=0;
unsigned char d[1000];
unsigned char oiv[8];
int op;
char dlen;
while (true) {
scanf("%d",&op);
scanf("%c",&dlen);
scanf("%c",&dlen);
for (i=0;i<dlen;i++)
scanf("%c",&d[i]);
if (op==1) {
for (i=0;i<8;i++)
oiv[i]=rand()%256;
encrypt(c,d,dlen,oiv);
c.recvcnt+=1;
} else if (op==2) {
for (i=0;i<8;i++)
scanf("%c",&oiv[i]);
decrypt(c,d,dlen,oiv, NULL);
c.sendcnt+=1;
}
fflush(stdout);
}
return 0;
}
int ssh_server_ecdh_init(ssh_session session, ssh_buffer packet){
/* ECDH keys */
ssh_string q_c_string = NULL;
ssh_string q_s_string = NULL;
EC_KEY *ecdh_key=NULL;
const EC_GROUP *group;
const EC_POINT *ecdh_pubkey;
bignum_CTX ctx;
/* SSH host keys (rsa,dsa,ecdsa) */
ssh_key privkey;
ssh_string sig_blob = NULL;
int len;
int rc;
enter_function();
/* Extract the client pubkey from the init packet */
q_c_string = buffer_get_ssh_string(packet);
if (q_c_string == NULL) {
ssh_set_error(session,SSH_FATAL, "No Q_C ECC point in packet");
goto error;
}
session->next_crypto->ecdh_client_pubkey = q_c_string;
/* Build server's keypair */
ctx = BN_CTX_new();
ecdh_key = EC_KEY_new_by_curve_name(NISTP256);
group = EC_KEY_get0_group(ecdh_key);
EC_KEY_generate_key(ecdh_key);
ecdh_pubkey=EC_KEY_get0_public_key(ecdh_key);
len = EC_POINT_point2oct(group,ecdh_pubkey,POINT_CONVERSION_UNCOMPRESSED,
NULL,0,ctx);
q_s_string=ssh_string_new(len);
EC_POINT_point2oct(group,ecdh_pubkey,POINT_CONVERSION_UNCOMPRESSED,
ssh_string_data(q_s_string),len,ctx);
BN_CTX_free(ctx);
session->next_crypto->ecdh_privkey = ecdh_key;
session->next_crypto->ecdh_server_pubkey = q_s_string;
buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_REPLY);
/* build k and session_id */
if (ecdh_build_k(session) < 0) {
ssh_set_error(session, SSH_FATAL, "Cannot build k number");
goto error;
}
if (ssh_get_key_params(session, &privkey) == SSH_ERROR)
goto error;
if (make_sessionid(session) != SSH_OK) {
ssh_set_error(session, SSH_FATAL, "Could not create a session id");
goto error;
}
/* add host's public key */
buffer_add_ssh_string(session->out_buffer, session->next_crypto->server_pubkey);
/* add ecdh public key */
buffer_add_ssh_string(session->out_buffer,q_s_string);
/* add signature blob */
sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
if (sig_blob == NULL) {
ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
goto error;
}
buffer_add_ssh_string(session->out_buffer, sig_blob);
ssh_string_free(sig_blob);
/* Free private keys as they should not be readable after this point */
if (session->srv.rsa_key) {
ssh_key_free(session->srv.rsa_key);
session->srv.rsa_key = NULL;
}
if (session->srv.dsa_key) {
ssh_key_free(session->srv.dsa_key);
session->srv.dsa_key = NULL;
}
ssh_log(session,SSH_LOG_PROTOCOL, "SSH_MSG_KEXDH_REPLY sent");
rc = packet_send(session);
if (rc == SSH_ERROR)
goto error;
/* Send the MSG_NEWKEYS */
if (buffer_add_u8(session->out_buffer, SSH2_MSG_NEWKEYS) < 0) {
goto error;
}
session->dh_handshake_state=DH_STATE_NEWKEYS_SENT;
rc=packet_send(session);
ssh_log(session, SSH_LOG_PROTOCOL, "SSH_MSG_NEWKEYS sent");
return rc;
error:
return SSH_ERROR;
}
static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype) {
uint8_t *buffer = NULL;
const char *ecstr;
size_t buf_len = 0, i;
int ret = 0, reason = ERR_R_BIO_LIB;
BN_CTX *ctx = NULL;
const EC_GROUP *group;
const EC_POINT *public_key;
const BIGNUM *priv_key;
uint8_t *pub_key_bytes = NULL;
size_t pub_key_bytes_len = 0;
if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
reason = ERR_R_PASSED_NULL_PARAMETER;
goto err;
}
ctx = BN_CTX_new();
if (ctx == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
if (ktype > 0) {
public_key = EC_KEY_get0_public_key(x);
if (public_key != NULL) {
pub_key_bytes_len = EC_POINT_point2oct(
group, public_key, EC_KEY_get_conv_form(x), NULL, 0, ctx);
if (pub_key_bytes_len == 0) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
pub_key_bytes = OPENSSL_malloc(pub_key_bytes_len);
if (pub_key_bytes == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
pub_key_bytes_len =
EC_POINT_point2oct(group, public_key, EC_KEY_get_conv_form(x),
pub_key_bytes, pub_key_bytes_len, ctx);
if (pub_key_bytes_len == 0) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
buf_len = pub_key_bytes_len;
}
}
if (ktype == 2) {
priv_key = EC_KEY_get0_private_key(x);
if (priv_key && (i = (size_t)BN_num_bytes(priv_key)) > buf_len) {
buf_len = i;
}
} else {
priv_key = NULL;
}
if (ktype > 0) {
buf_len += 10;
if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
}
if (ktype == 2) {
ecstr = "Private-Key";
} else if (ktype == 1) {
ecstr = "Public-Key";
} else {
ecstr = "ECDSA-Parameters";
}
if (!BIO_indent(bp, off, 128)) {
goto err;
}
const BIGNUM *order = EC_GROUP_get0_order(group);
if (BIO_printf(bp, "%s: (%d bit)\n", ecstr, BN_num_bits(order)) <= 0) {
goto err;
}
if ((priv_key != NULL) &&
!ASN1_bn_print(bp, "priv:", priv_key, buffer, off)) {
goto err;
}
if (pub_key_bytes != NULL) {
BIO_hexdump(bp, pub_key_bytes, pub_key_bytes_len, off);
}
/* TODO(fork): implement */
/*
if (!ECPKParameters_print(bp, group, off))
goto err; */
ret = 1;
err:
if (!ret) {
OPENSSL_PUT_ERROR(EVP, reason);
}
OPENSSL_free(pub_key_bytes);
BN_CTX_free(ctx);
OPENSSL_free(buffer);
return ret;
}
/* Our version of the ossl_ecdh_compute_key replaced in the EC_KEY_METHOD */
static int pkcs11_ec_ckey(void *out,
size_t outlen,
const EC_POINT *ecpointpeer,
const EC_KEY *ecdh,
void *(*KDF) (const void *in,
size_t inlen,
void *out,
size_t *outlen))
{
int ret = -1;
size_t buflen;
unsigned char *buf = NULL;
size_t peerbuflen;
unsigned char *peerbuf = NULL;
const EC_GROUP *ecgroup = NULL;
const EC_POINT *ecpoint = NULL;
CK_ECDH1_DERIVE_PARAMS ecdh_parms;
PKCS11_KEY * key = NULL;
key = (PKCS11_KEY *) EC_KEY_get_ex_data(ecdh, ec_key_ex_index);
if (key == NULL) {
ret -1;
goto err;
}
/* both peer and ecdh use same group parameters */
ecgroup = EC_KEY_get0_group(ecdh);
buflen = (EC_GROUP_get_degree(ecgroup) + 7) / 8;
peerbuflen = 2*buflen + 1;
peerbuf = OPENSSL_malloc(peerbuflen);
if (peerbuf == NULL) {
ret = -1;
goto err;
}
ecdh_parms.kdf = CKD_NULL;
ecdh_parms.ulSharedDataLen = 0;
ecdh_parms.pSharedData = NULL;
ecdh_parms.ulPublicDataLen = peerbuflen;
ret = EC_POINT_point2oct(ecgroup,
ecpointpeer,
POINT_CONVERSION_UNCOMPRESSED,
peerbuf, peerbuflen,NULL);
ecdh_parms.ulPublicDataLen = peerbuflen;
ecdh_parms.pPublicData = peerbuf;
ret = pkcs11_ecdh_derive_internal(&buf, &buflen, CKM_ECDH1_DERIVE,
(const void *)&ecdh_parms, NULL, key);
if (KDF != 0) {
if (KDF(buf, buflen, out, &outlen) == NULL) {
ret -1;
goto err;
}
ret = outlen;
} else {
if (outlen > buflen)
outlen = buflen;
memcpy(out, buf, outlen);
ret = outlen;
}
err:
OPENSSL_free(buf);
return (ret);
}
CK_RV PKCS11_Objects_OpenSSL::GetAttributeValue(Cryptoki_Session_Context* pSessionCtx, CK_OBJECT_HANDLE hObject, CK_ATTRIBUTE_PTR pTemplate, CK_ULONG ulCount)
{
OBJECT_DATA* pObj = PKCS11_Objects_OpenSSL::GetObjectFromHandle(pSessionCtx, hObject);
if(pObj == NULL) return CKR_OBJECT_HANDLE_INVALID;
if(pObj->Type == CertificateType)
{
CERT_DATA* pCertData = (CERT_DATA*)pObj->Data;
X509* pCert = pCertData->cert;
INT32 valLen = 0;
for(int i=0; i<(int)ulCount; i++)
{
switch(pTemplate[i].type)
{
case CKA_CLASS:
*(INT32*)pTemplate[i].pValue = SwapEndianIfBEc32(CKO_CERTIFICATE);
break;
case CKA_PRIVATE:
*(INT32*)pTemplate[i].pValue = SwapEndianIfBEc32(pCertData->privKeyData.key == NULL ? 0 : 1);
valLen = sizeof(INT32);
break;
case CKA_VALUE_BITS:
{
*(INT32*)pTemplate[i].pValue = SwapEndianIfBEc32(pCertData->pubKeyData.size);
valLen = sizeof(INT32);
}
break;
case CKA_KEY_TYPE:
{
*(UINT32*)pTemplate[i].pValue = SwapEndianIfBEc32(pCertData->pubKeyData.type);
valLen = sizeof(UINT32);
}
break;
case CKA_ISSUER:
{
char* name=X509_NAME_oneline(X509_get_issuer_name(pCert),NULL,0);
valLen = TINYCLR_SSL_STRLEN(name) + 1;
if(valLen > pTemplate[i].ulValueLen) valLen = pTemplate[i].ulValueLen;
hal_strcpy_s((char*)pTemplate[i].pValue, valLen, name);
OPENSSL_free(name);
}
break;
case CKA_SUBJECT:
{
char* subject=X509_NAME_oneline(X509_get_subject_name(pCert),NULL,0);
valLen = TINYCLR_SSL_STRLEN(subject) + 1;
if(valLen > pTemplate[i].ulValueLen) valLen = pTemplate[i].ulValueLen;
hal_strcpy_s((char*)pTemplate[i].pValue, valLen, subject);
OPENSSL_free(subject);
}
break;
case CKA_SERIAL_NUMBER:
{
ASN1_INTEGER* asn = X509_get_serialNumber(pCert);
valLen = asn->length;
if(valLen > pTemplate[i].ulValueLen) valLen = pTemplate[i].ulValueLen;
TINYCLR_SSL_MEMCPY(pTemplate[i].pValue, asn->data, valLen);
}
break;
case CKA_MECHANISM_TYPE:
if(pCert->sig_alg != NULL)
{
int signature_nid;
CK_MECHANISM_TYPE type = CKM_VENDOR_DEFINED;
signature_nid = OBJ_obj2nid(pCert->sig_alg->algorithm);
switch(signature_nid)
{
case NID_sha1WithRSA:
case NID_sha1WithRSAEncryption:
//szNid = "1.2.840.113549.1.1.5";
type = CKM_SHA1_RSA_PKCS;
break;
case NID_md5WithRSA:
case NID_md5WithRSAEncryption:
//szNid = "1.2.840.113549.1.1.4";
type = CKM_MD5_RSA_PKCS;
break;
case NID_sha256WithRSAEncryption:
//szNid = "1.2.840.113549.1.1.11";
type = CKM_SHA256_RSA_PKCS;
break;
case NID_sha384WithRSAEncryption:
//szNid = "1.2.840.113549.1.1.12";
type = CKM_SHA384_RSA_PKCS;
break;
case NID_sha512WithRSAEncryption:
//szNid = "1.2.840.113549.1.1.13";
type = CKM_SHA512_RSA_PKCS;
break;
}
valLen = sizeof(CK_MECHANISM_TYPE);
*(CK_MECHANISM_TYPE*)pTemplate[i].pValue = SwapEndianIfBEc32(type);
}
break;
case CKA_START_DATE:
{
DATE_TIME_INFO dti;
ssl_get_ASN1_UTCTIME(X509_get_notBefore(pCert), &dti);
valLen = (INT32)pTemplate[i].ulValueLen;
if(valLen > sizeof(dti)) valLen = sizeof(dti);
TINYCLR_SSL_MEMCPY(pTemplate[i].pValue, &dti, valLen);
}
break;
case CKA_END_DATE:
{
DATE_TIME_INFO dti;
ssl_get_ASN1_UTCTIME(X509_get_notAfter(pCert), &dti);
valLen = pTemplate[i].ulValueLen;
if(valLen > sizeof(dti)) valLen = sizeof(dti);
TINYCLR_SSL_MEMCPY(pTemplate[i].pValue, &dti, valLen);
}
break;
case CKA_VALUE:
{
UINT8* pData = (UINT8*)pTemplate[i].pValue;
UINT8* pTmp = pData;
valLen = i2d_X509(pCert, NULL);
if(valLen > pTemplate[i].ulValueLen) return CKR_DEVICE_MEMORY;
valLen = i2d_X509(pCert, &pTmp);
if(valLen < 0) return CKR_FUNCTION_FAILED;
}
break;
case CKA_VALUE_LEN:
*(UINT32*)pTemplate[i].pValue = SwapEndianIfBEc32(valLen);
break;
default:
return CKR_ATTRIBUTE_TYPE_INVALID;
}
}
}
else if(pObj->Type == KeyType)
{
KEY_DATA* pKey = (KEY_DATA*)pObj->Data;
int valLen = 0;
bool isPrivate = false;
for(int i=0; i<(int)ulCount; i++)
{
switch(pTemplate[i].type)
{
case CKA_CLASS:
*(INT32*)pTemplate[i].pValue = SwapEndianIfBEc32((0 != (pKey->attrib & Private) ? CKO_PRIVATE_KEY : 0 != (pKey->attrib & Public) ? CKO_PUBLIC_KEY : CKO_SECRET_KEY));
break;
case CKA_MODULUS:
if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->n, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_EXPONENT_1:
if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->dmp1, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_EXPONENT_2:
if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->dmq1, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_COEFFICIENT:
if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->iqmp, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_PRIME_1:
if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->p, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_PRIME_2:
if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->q, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_PRIVATE_EXPONENT:
if(pKey->type == CKK_DSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.dsa->priv_key, (UINT8*)pTemplate[i].pValue);
}
else if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->d, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_PUBLIC_EXPONENT:
if(pKey->type == CKK_DSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.dsa->pub_key, (UINT8*)pTemplate[i].pValue);
}
else if(pKey->type == CKK_EC)
{
UINT8 pTmp[66*2+1];
EC_KEY* pEC = ((EVP_PKEY*)pKey->key)->pkey.ec;
const EC_POINT* point = EC_KEY_get0_public_key(pEC);
valLen = EC_POINT_point2oct(EC_KEY_get0_group(pEC), point, POINT_CONVERSION_UNCOMPRESSED, (UINT8*)pTmp, ARRAYSIZE(pTmp), NULL);
if(valLen == 0) return CKR_FUNCTION_FAILED;
memmove(pTemplate[i].pValue, &pTmp[1], valLen-1); // remove POINT_CONVERSION_UNCOMPRESSED header byte
}
else if(pKey->type == CKK_RSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.rsa->e, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_PRIME:
if(pKey->type == CKK_DSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.dsa->p, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_SUBPRIME:
if(pKey->type == CKK_DSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.dsa->q, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_BASE:
if(pKey->type == CKK_DSA)
{
EVP_PKEY* pRealKey = (EVP_PKEY*)pKey->key;
valLen = BN_bn2bin(pRealKey->pkey.dsa->g, (UINT8*)pTemplate[i].pValue);
}
break;
case CKA_PRIVATE:
isPrivate = 0 != *(INT32*)pTemplate[i].pValue;
break;
case CKA_KEY_TYPE:
*(INT32*)pTemplate[i].pValue = SwapEndianIfBEc32(pKey->type);
break;
case CKA_VALUE_BITS:
*(UINT32*)pTemplate[i].pValue = SwapEndianIfBEc32(pKey->size);
break;
case CKA_VALUE:
switch(pKey->type)
{
case CKK_AES:
case CKK_GENERIC_SECRET:
{
// TODO: Add permissions to export key
int len = (pKey->size + 7) / 8;
if(len > (INT32)pTemplate[i].ulValueLen) len = (int)pTemplate[i].ulValueLen;
TINYCLR_SSL_MEMCPY(pTemplate[i].pValue, pKey->key, len);
valLen = len;
}
break;
default:
return CKR_ATTRIBUTE_TYPE_INVALID;
}
break;
case CKA_VALUE_LEN:
switch(pKey->type)
{
case CKK_EC:
*(UINT32*)pTemplate[i].pValue = SwapEndianIfBEc32(valLen);
break;
default:
return CKR_ATTRIBUTE_TYPE_INVALID;
}
break;
default:
return CKR_ATTRIBUTE_TYPE_INVALID;
}
}
}
return CKR_OK;
}
int verifyRingSignature(data_chunk &keyImage, uint256 &txnHash, int nRingSize, const uint8_t *pPubkeys, const uint8_t *pSigc, const uint8_t *pSigr)
{
if (fDebugRingSig)
{
// LogPrintf("%s size %d\n", __func__, nRingSize); // happens often
};
int rv = 0;
BN_CTX_start(bnCtx);
BIGNUM *bnT = BN_CTX_get(bnCtx);
BIGNUM *bnH = BN_CTX_get(bnCtx);
BIGNUM *bnC = BN_CTX_get(bnCtx);
BIGNUM *bnR = BN_CTX_get(bnCtx);
BIGNUM *bnSum = BN_CTX_get(bnCtx);
EC_POINT *ptT1 = NULL;
EC_POINT *ptT2 = NULL;
EC_POINT *ptT3 = NULL;
EC_POINT *ptPk = NULL;
EC_POINT *ptKi = NULL;
EC_POINT *ptL = NULL;
EC_POINT *ptR = NULL;
EC_POINT *ptSi = NULL;
uint8_t tempData[66]; // hold raw point data to hash
uint256 commitHash;
CHashWriter ssCommitHash(SER_GETHASH, PROTOCOL_VERSION);
ssCommitHash << txnHash;
// zero sum
if (!bnSum || !(BN_zero(bnSum)))
{
LogPrintf("%s: BN_zero failed.\n", __func__);
rv = 1; goto End;
};
if ( !(ptT1 = EC_POINT_new(ecGrp))
|| !(ptT2 = EC_POINT_new(ecGrp))
|| !(ptT3 = EC_POINT_new(ecGrp))
|| !(ptPk = EC_POINT_new(ecGrp))
|| !(ptKi = EC_POINT_new(ecGrp))
|| !(ptL = EC_POINT_new(ecGrp))
|| !(ptSi = EC_POINT_new(ecGrp))
|| !(ptR = EC_POINT_new(ecGrp)))
{
LogPrintf("%s: EC_POINT_new failed.\n", __func__);
rv = 1; goto End;
};
// get keyimage as point
if (!(bnT = BN_bin2bn(&keyImage[0], EC_COMPRESSED_SIZE, bnT))
|| !(ptKi) || !(ptKi = EC_POINT_bn2point(ecGrp, bnT, ptKi, bnCtx)))
{
LogPrintf("%s: extract ptKi failed.\n", __func__);
rv = 1; goto End;
};
for (int i = 0; i < nRingSize; ++i)
{
// Li = ci * Pi + ri * G
// Ri = ci * I + ri * Hp(Pi)
if ( !bnC || !(bnC = BN_bin2bn(&pSigc[i * EC_SECRET_SIZE], EC_SECRET_SIZE, bnC))
|| !bnR || !(bnR = BN_bin2bn(&pSigr[i * EC_SECRET_SIZE], EC_SECRET_SIZE, bnR)))
{
LogPrintf("%s: extract bnC and bnR failed.\n", __func__);
rv = 1; goto End;
};
// get Pk i as point
if (!(bnT = BN_bin2bn(&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT))
|| !(ptPk) || !(ptPk = EC_POINT_bn2point(ecGrp, bnT, ptPk, bnCtx)))
{
LogPrintf("%s: extract ptPk failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = ci * Pi
if (!EC_POINT_mul(ecGrp, ptT1, NULL, ptPk, bnC, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 = ri * G
if (!EC_POINT_mul(ecGrp, ptT2, bnR, NULL, NULL, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptL = ptT1 + ptT2
if (!EC_POINT_add(ecGrp, ptL, ptT1, ptT2, bnCtx))
{
LogPrintf("%s: EC_POINT_add failed.\n", __func__);
rv = 1; goto End;
};
// ptT3 = Hp(Pi)
if (hashToEC(&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT, ptT3) != 0)
{
LogPrintf("%s: hashToEC failed.\n", __func__);
rv = 1; goto End;
};
// DEBUGGING: ------- check if we can find the signer...
// ptSi = Pi * bnT
if ((!EC_POINT_mul(ecGrp, ptSi, NULL, ptPk, bnT, bnCtx)
|| false)
&& (rv = errorN(1, "%s: EC_POINT_mul failed.1", __func__)))
goto End;
if (0 == EC_POINT_cmp(ecGrp, ptSi, ptKi, bnCtx) )
LogPrintf("signer is index %d\n", i);
// DEBUGGING: - End - check if we can find the signer...
// ptT1 = k1 * I
if (!EC_POINT_mul(ecGrp, ptT1, NULL, ptKi, bnC, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 = k2 * ptT3
if (!EC_POINT_mul(ecGrp, ptT2, NULL, ptT3, bnR, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptR = ptT1 + ptT2
if (!EC_POINT_add(ecGrp, ptR, ptT1, ptT2, bnCtx))
{
LogPrintf("%s: EC_POINT_add failed.\n", __func__);
rv = 1; goto End;
};
// sum = (sum + ci) % N
if (!BN_mod_add(bnSum, bnSum, bnC, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_add failed.\n", __func__);
rv = 1; goto End;
};
// -- add ptL and ptR to hash
if ( !(EC_POINT_point2oct(ecGrp, ptL, POINT_CONVERSION_COMPRESSED, &tempData[0], 33, bnCtx) == (int) EC_COMPRESSED_SIZE)
|| !(EC_POINT_point2oct(ecGrp, ptR, POINT_CONVERSION_COMPRESSED, &tempData[33], 33, bnCtx) == (int) EC_COMPRESSED_SIZE))
{
LogPrintf("%s: extract ptL and ptR failed.\n", __func__);
rv = 1; goto End;
};
ssCommitHash.write((const char*)&tempData[0], 66);
};
commitHash = ssCommitHash.GetHash();
if (!(bnH) || !(bnH = BN_bin2bn(commitHash.begin(), EC_SECRET_SIZE, bnH)))
{
LogPrintf("%s: commitHash -> bnH failed.\n", __func__);
rv = 1; goto End;
};
if (!BN_mod(bnH, bnH, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod failed.\n", __func__);
rv = 1; goto End;
};
// bnT = (bnH - bnSum) % N
if (!BN_mod_sub(bnT, bnH, bnSum, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_sub failed.\n", __func__);
rv = 1; goto End;
};
// test bnT == 0 (bnSum == bnH)
if (!BN_is_zero(bnT))
{
LogPrintf("%s: signature does not verify.\n", __func__);
rv = 2;
};
End:
EC_POINT_free(ptT1);
EC_POINT_free(ptT2);
EC_POINT_free(ptT3);
EC_POINT_free(ptPk);
EC_POINT_free(ptKi);
EC_POINT_free(ptL);
EC_POINT_free(ptR);
EC_POINT_free(ptSi);
BN_CTX_end(bnCtx);
return rv;
};
int
sc_pkcs15_convert_prkey(struct sc_pkcs15_prkey *pkcs15_key, void *evp_key)
{
#ifdef ENABLE_OPENSSL
EVP_PKEY *pk = (EVP_PKEY *)evp_key;
switch (pk->type) {
case EVP_PKEY_RSA: {
struct sc_pkcs15_prkey_rsa *dst = &pkcs15_key->u.rsa;
RSA *src = EVP_PKEY_get1_RSA(pk);
pkcs15_key->algorithm = SC_ALGORITHM_RSA;
if (!sc_pkcs15_convert_bignum(&dst->modulus, src->n)
|| !sc_pkcs15_convert_bignum(&dst->exponent, src->e)
|| !sc_pkcs15_convert_bignum(&dst->d, src->d)
|| !sc_pkcs15_convert_bignum(&dst->p, src->p)
|| !sc_pkcs15_convert_bignum(&dst->q, src->q))
return SC_ERROR_NOT_SUPPORTED;
if (src->iqmp && src->dmp1 && src->dmq1) {
sc_pkcs15_convert_bignum(&dst->iqmp, src->iqmp);
sc_pkcs15_convert_bignum(&dst->dmp1, src->dmp1);
sc_pkcs15_convert_bignum(&dst->dmq1, src->dmq1);
}
RSA_free(src);
break;
}
case EVP_PKEY_DSA: {
struct sc_pkcs15_prkey_dsa *dst = &pkcs15_key->u.dsa;
DSA *src = EVP_PKEY_get1_DSA(pk);
pkcs15_key->algorithm = SC_ALGORITHM_DSA;
sc_pkcs15_convert_bignum(&dst->pub, src->pub_key);
sc_pkcs15_convert_bignum(&dst->p, src->p);
sc_pkcs15_convert_bignum(&dst->q, src->q);
sc_pkcs15_convert_bignum(&dst->g, src->g);
sc_pkcs15_convert_bignum(&dst->priv, src->priv_key);
DSA_free(src);
break;
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000L && !defined(OPENSSL_NO_EC)
case NID_id_GostR3410_2001: {
struct sc_pkcs15_prkey_gostr3410 *dst = &pkcs15_key->u.gostr3410;
EC_KEY *src = EVP_PKEY_get0(pk);
assert(src);
pkcs15_key->algorithm = SC_ALGORITHM_GOSTR3410;
assert(EC_KEY_get0_private_key(src));
sc_pkcs15_convert_bignum(&dst->d, EC_KEY_get0_private_key(src));
break;
}
case EVP_PKEY_EC: {
struct sc_pkcs15_prkey_ec *dst = &pkcs15_key->u.ec;
EC_KEY *src = NULL;
const EC_GROUP *grp = NULL;
unsigned char buf[255];
size_t buflen = 255;
int nid;
src = EVP_PKEY_get0(pk);
assert(src);
assert(EC_KEY_get0_private_key(src));
assert(EC_KEY_get0_public_key(src));
pkcs15_key->algorithm = SC_ALGORITHM_EC;
if (!sc_pkcs15_convert_bignum(&dst->privateD, EC_KEY_get0_private_key(src)))
return SC_ERROR_INCOMPATIBLE_KEY;
grp = EC_KEY_get0_group(src);
if(grp == 0)
return SC_ERROR_INCOMPATIBLE_KEY;
/* get curve name */
nid = EC_GROUP_get_curve_name(grp);
if(nid != 0)
dst->params.named_curve = strdup(OBJ_nid2sn(nid));
/* Decode EC_POINT from a octet string */
buflen = EC_POINT_point2oct(grp, (const EC_POINT *) EC_KEY_get0_public_key(src),
POINT_CONVERSION_UNCOMPRESSED, buf, buflen, NULL);
if (!buflen)
return SC_ERROR_INCOMPATIBLE_KEY;
/* copy the public key */
dst->ecpointQ.value = malloc(buflen);
memcpy(dst->ecpointQ.value, buf, buflen);
dst->ecpointQ.len = buflen;
/* calculate the field length */
dst->params.field_length = (buflen - 1) / 2 * 8;
/* Octetstring may need leading zeros if BN is to short */
if (dst->privateD.len < dst->params.field_length/8) {
size_t d = dst->params.field_length/8 - dst->privateD.len;
dst->privateD.data = realloc(dst->privateD.data, dst->privateD.len + d);
if (!dst->privateD.data)
return SC_ERROR_OUT_OF_MEMORY;
memmove(dst->privateD.data + d, dst->privateD.data, dst->privateD.len);
memset(dst->privateD.data, 0, d);
dst->privateD.len += d;
}
break;
}
#endif /* OPENSSL_VERSION_NUMBER >= 0x10000000L && !defined(OPENSSL_NO_EC) */
default:
return SC_ERROR_NOT_SUPPORTED;
}
return SC_SUCCESS;
#else
return SC_ERROR_NOT_IMPLEMENTED;
#endif
}
int
sc_pkcs15_convert_pubkey(struct sc_pkcs15_pubkey *pkcs15_key, void *evp_key)
{
#ifdef ENABLE_OPENSSL
EVP_PKEY *pk = (EVP_PKEY *)evp_key;
switch (pk->type) {
case EVP_PKEY_RSA: {
struct sc_pkcs15_pubkey_rsa *dst = &pkcs15_key->u.rsa;
RSA *src = EVP_PKEY_get1_RSA(pk);
pkcs15_key->algorithm = SC_ALGORITHM_RSA;
if (!sc_pkcs15_convert_bignum(&dst->modulus, src->n) || !sc_pkcs15_convert_bignum(&dst->exponent, src->e))
return SC_ERROR_INVALID_DATA;
RSA_free(src);
break;
}
case EVP_PKEY_DSA: {
struct sc_pkcs15_pubkey_dsa *dst = &pkcs15_key->u.dsa;
DSA *src = EVP_PKEY_get1_DSA(pk);
pkcs15_key->algorithm = SC_ALGORITHM_DSA;
sc_pkcs15_convert_bignum(&dst->pub, src->pub_key);
sc_pkcs15_convert_bignum(&dst->p, src->p);
sc_pkcs15_convert_bignum(&dst->q, src->q);
sc_pkcs15_convert_bignum(&dst->g, src->g);
DSA_free(src);
break;
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000L && !defined(OPENSSL_NO_EC)
case NID_id_GostR3410_2001: {
struct sc_pkcs15_pubkey_gostr3410 *dst = &pkcs15_key->u.gostr3410;
EC_KEY *eckey = EVP_PKEY_get0(pk);
const EC_POINT *point;
BIGNUM *X, *Y;
int r = 0;
assert(eckey);
point = EC_KEY_get0_public_key(eckey);
if (!point)
return SC_ERROR_INTERNAL;
X = BN_new();
Y = BN_new();
if (X && Y && EC_KEY_get0_group(eckey))
r = EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(eckey),
point, X, Y, NULL);
if (r == 1) {
dst->xy.len = BN_num_bytes(X) + BN_num_bytes(Y);
dst->xy.data = malloc(dst->xy.len);
if (dst->xy.data) {
BN_bn2bin(Y, dst->xy.data);
BN_bn2bin(X, dst->xy.data + BN_num_bytes(Y));
r = sc_mem_reverse(dst->xy.data, dst->xy.len);
if (!r)
r = 1;
pkcs15_key->algorithm = SC_ALGORITHM_GOSTR3410;
}
else
r = -1;
}
BN_free(X);
BN_free(Y);
if (r != 1)
return SC_ERROR_INTERNAL;
break;
}
case EVP_PKEY_EC: {
struct sc_pkcs15_pubkey_ec *dst = &pkcs15_key->u.ec;
EC_KEY *src = NULL;
const EC_GROUP *grp = NULL;
unsigned char buf[255];
size_t buflen = 255;
int nid;
src = EVP_PKEY_get0(pk);
assert(src);
assert(EC_KEY_get0_public_key(src));
pkcs15_key->algorithm = SC_ALGORITHM_EC;
grp = EC_KEY_get0_group(src);
if(grp == 0)
return SC_ERROR_INCOMPATIBLE_KEY;
/* Decode EC_POINT from a octet string */
buflen = EC_POINT_point2oct(grp, (const EC_POINT *) EC_KEY_get0_public_key(src),
POINT_CONVERSION_UNCOMPRESSED, buf, buflen, NULL);
/* get curve name */
nid = EC_GROUP_get_curve_name(grp);
if(nid != 0) {
const char *name = OBJ_nid2sn(nid);
if(sizeof(name) > 0)
dst->params.named_curve = strdup(name);
}
/* copy the public key */
if (buflen > 0) {
dst->ecpointQ.value = malloc(buflen);
memcpy(dst->ecpointQ.value, buf, buflen);
dst->ecpointQ.len = buflen;
/* calculate the field length */
dst->params.field_length = (buflen - 1) / 2 * 8;
}
else
return SC_ERROR_INCOMPATIBLE_KEY;
break;
}
#endif /* OPENSSL_VERSION_NUMBER >= 0x10000000L && !defined(OPENSSL_NO_EC) */
default:
return SC_ERROR_NOT_SUPPORTED;
}
return SC_SUCCESS;
#else
return SC_ERROR_NOT_IMPLEMENTED;
#endif
}
SM2_CIPHERTEXT_VALUE *SM2_do_encrypt(const EVP_MD *kdf_md, const EVP_MD *mac_md,
const unsigned char *in, size_t inlen, EC_KEY *ec_key)
{
int ok = 0;
SM2_CIPHERTEXT_VALUE *cv = NULL;
const EC_GROUP *ec_group = EC_KEY_get0_group(ec_key);
const EC_POINT *pub_key = EC_KEY_get0_public_key(ec_key);
KDF_FUNC kdf = KDF_get_x9_63(kdf_md);
EC_POINT *point = NULL;
BIGNUM *n = NULL;
BIGNUM *h = NULL;
BIGNUM *k = NULL;
BN_CTX *bn_ctx = NULL;
EVP_MD_CTX *md_ctx = NULL;
unsigned char buf[(OPENSSL_ECC_MAX_FIELD_BITS + 7)/4 + 1];
int nbytes;
size_t len;
int i;
if (!ec_group || !pub_key) {
goto end;
}
if (!kdf) {
goto end;
}
/* init ciphertext_value */
if (!(cv = OPENSSL_malloc(sizeof(SM2_CIPHERTEXT_VALUE)))) {
goto end;
}
bzero(cv, sizeof(SM2_CIPHERTEXT_VALUE));
cv->ephem_point = EC_POINT_new(ec_group);
cv->ciphertext = OPENSSL_malloc(inlen);
cv->ciphertext_size = inlen;
if (!cv->ephem_point || !cv->ciphertext) {
goto end;
}
point = EC_POINT_new(ec_group);
n = BN_new();
h = BN_new();
k = BN_new();
bn_ctx = BN_CTX_new();
md_ctx = EVP_MD_CTX_create();
if (!point || !n || !h || !k || !bn_ctx || !md_ctx) {
goto end;
}
/* init ec domain parameters */
if (!EC_GROUP_get_order(ec_group, n, bn_ctx)) {
goto end;
}
if (!EC_GROUP_get_cofactor(ec_group, h, bn_ctx)) {
goto end;
}
nbytes = (EC_GROUP_get_degree(ec_group) + 7) / 8;
OPENSSL_assert(nbytes == BN_num_bytes(n));
#if 0
/* check sm2 curve and md is 256 bits */
OPENSSL_assert(nbytes == 32);
OPENSSL_assert(EVP_MD_size(kdf_md) == 32);
OPENSSL_assert(EVP_MD_size(mac_md) == 32);
#endif
do
{
/* A1: rand k in [1, n-1] */
do {
BN_rand_range(k, n);
} while (BN_is_zero(k));
/* A2: C1 = [k]G = (x1, y1) */
if (!EC_POINT_mul(ec_group, cv->ephem_point, k, NULL, NULL, bn_ctx)) {
goto end;
}
/* A3: check [h]P_B != O */
if (!EC_POINT_mul(ec_group, point, NULL, pub_key, h, bn_ctx)) {
goto end;
}
if (EC_POINT_is_at_infinity(ec_group, point)) {
goto end;
}
/* A4: compute ECDH [k]P_B = (x2, y2) */
if (!EC_POINT_mul(ec_group, point, NULL, pub_key, k, bn_ctx)) {
goto end;
}
if (!(len = EC_POINT_point2oct(ec_group, point,
POINT_CONVERSION_UNCOMPRESSED, buf, sizeof(buf), bn_ctx))) {
goto end;
}
OPENSSL_assert(len == nbytes * 2 + 1);
/* A5: t = KDF(x2 || y2, klen) */
kdf(buf + 1, len - 1, cv->ciphertext, &cv->ciphertext_size);
for (i = 0; i < cv->ciphertext_size; i++) {
if (cv->ciphertext[i]) {
break;
}
}
if (i == cv->ciphertext_size) {
continue;
}
break;
} while (1);
/* A6: C2 = M xor t */
for (i = 0; i < inlen; i++) {
cv->ciphertext[i] ^= in[i];
}
/* A7: C3 = Hash(x2 || M || y2) */
if (!EVP_DigestInit_ex(md_ctx, mac_md, NULL)) {
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1, nbytes)) {
goto end;
}
if (!EVP_DigestUpdate(md_ctx, in, inlen)) {
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1 + nbytes, nbytes)) {
goto end;
}
if (!EVP_DigestFinal_ex(md_ctx, cv->mactag, &cv->mactag_size)) {
goto end;
}
ok = 1;
end:
if (!ok && cv) {
SM2_CIPHERTEXT_VALUE_free(cv);
cv = NULL;
}
if (point) EC_POINT_free(point);
if (n) BN_free(n);
if (h) BN_free(h);
if (k) BN_free(k);
if (bn_ctx) BN_CTX_free(bn_ctx);
if (md_ctx) EVP_MD_CTX_destroy(md_ctx);
return cv;
}
void char2_field_tests()
{
BN_CTX *ctx = NULL;
BIGNUM *p, *a, *b;
EC_GROUP *group;
EC_GROUP *C2_K163 = NULL, *C2_K233 = NULL, *C2_K283 = NULL, *C2_K409 = NULL, *C2_K571 = NULL;
EC_GROUP *C2_B163 = NULL, *C2_B233 = NULL, *C2_B283 = NULL, *C2_B409 = NULL, *C2_B571 = NULL;
EC_POINT *P, *Q, *R;
BIGNUM *x, *y, *z, *cof;
unsigned char buf[100];
size_t i, len;
int k;
#if 1 /* optional */
ctx = BN_CTX_new();
if (!ctx) ABORT;
#endif
p = BN_new();
a = BN_new();
b = BN_new();
if (!p || !a || !b) ABORT;
if (!BN_hex2bn(&p, "13")) ABORT;
if (!BN_hex2bn(&a, "3")) ABORT;
if (!BN_hex2bn(&b, "1")) ABORT;
group = EC_GROUP_new(EC_GF2m_simple_method()); /* applications should use EC_GROUP_new_curve_GF2m
* so that the library gets to choose the EC_METHOD */
if (!group) ABORT;
if (!EC_GROUP_set_curve_GF2m(group, p, a, b, ctx)) ABORT;
{
EC_GROUP *tmp;
tmp = EC_GROUP_new(EC_GROUP_method_of(group));
if (!tmp) ABORT;
if (!EC_GROUP_copy(tmp, group)) ABORT;
EC_GROUP_free(group);
group = tmp;
}
if (!EC_GROUP_get_curve_GF2m(group, p, a, b, ctx)) ABORT;
fprintf(stdout, "Curve defined by Weierstrass equation\n y^2 + x*y = x^3 + a*x^2 + b (mod 0x");
BN_print_fp(stdout, p);
fprintf(stdout, ")\n a = 0x");
BN_print_fp(stdout, a);
fprintf(stdout, "\n b = 0x");
BN_print_fp(stdout, b);
fprintf(stdout, "\n(0x... means binary polynomial)\n");
P = EC_POINT_new(group);
Q = EC_POINT_new(group);
R = EC_POINT_new(group);
if (!P || !Q || !R) ABORT;
if (!EC_POINT_set_to_infinity(group, P)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
buf[0] = 0;
if (!EC_POINT_oct2point(group, Q, buf, 1, ctx)) ABORT;
if (!EC_POINT_add(group, P, P, Q, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
x = BN_new();
y = BN_new();
z = BN_new();
cof = BN_new();
if (!x || !y || !z || !cof) ABORT;
if (!BN_hex2bn(&x, "6")) ABORT;
/* Change test based on whether binary point compression is enabled or not. */
#ifdef OPENSSL_EC_BIN_PT_COMP
if (!EC_POINT_set_compressed_coordinates_GF2m(group, Q, x, 1, ctx)) ABORT;
#else
if (!BN_hex2bn(&y, "8")) ABORT;
if (!EC_POINT_set_affine_coordinates_GF2m(group, Q, x, y, ctx)) ABORT;
#endif
if (!EC_POINT_is_on_curve(group, Q, ctx))
{
/* Change test based on whether binary point compression is enabled or not. */
#ifdef OPENSSL_EC_BIN_PT_COMP
if (!EC_POINT_get_affine_coordinates_GF2m(group, Q, x, y, ctx)) ABORT;
#endif
fprintf(stderr, "Point is not on curve: x = 0x");
BN_print_fp(stderr, x);
fprintf(stderr, ", y = 0x");
BN_print_fp(stderr, y);
fprintf(stderr, "\n");
ABORT;
}
fprintf(stdout, "A cyclic subgroup:\n");
k = 100;
do
{
if (k-- == 0) ABORT;
if (EC_POINT_is_at_infinity(group, P))
fprintf(stdout, " point at infinity\n");
else
{
if (!EC_POINT_get_affine_coordinates_GF2m(group, P, x, y, ctx)) ABORT;
fprintf(stdout, " x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, ", y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
}
if (!EC_POINT_copy(R, P)) ABORT;
if (!EC_POINT_add(group, P, P, Q, ctx)) ABORT;
}
while (!EC_POINT_is_at_infinity(group, P));
if (!EC_POINT_add(group, P, Q, R, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
/* Change test based on whether binary point compression is enabled or not. */
#ifdef OPENSSL_EC_BIN_PT_COMP
len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_COMPRESSED, buf, sizeof buf, ctx);
if (len == 0) ABORT;
if (!EC_POINT_oct2point(group, P, buf, len, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, Q, ctx)) ABORT;
fprintf(stdout, "Generator as octet string, compressed form:\n ");
for (i = 0; i < len; i++) fprintf(stdout, "%02X", buf[i]);
#endif
len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_UNCOMPRESSED, buf, sizeof buf, ctx);
if (len == 0) ABORT;
if (!EC_POINT_oct2point(group, P, buf, len, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, Q, ctx)) ABORT;
fprintf(stdout, "\nGenerator as octet string, uncompressed form:\n ");
for (i = 0; i < len; i++) fprintf(stdout, "%02X", buf[i]);
/* Change test based on whether binary point compression is enabled or not. */
#ifdef OPENSSL_EC_BIN_PT_COMP
len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_HYBRID, buf, sizeof buf, ctx);
if (len == 0) ABORT;
if (!EC_POINT_oct2point(group, P, buf, len, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, Q, ctx)) ABORT;
fprintf(stdout, "\nGenerator as octet string, hybrid form:\n ");
for (i = 0; i < len; i++) fprintf(stdout, "%02X", buf[i]);
#endif
fprintf(stdout, "\n");
if (!EC_POINT_invert(group, P, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, R, ctx)) ABORT;
/* Curve K-163 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve K-163",
"0800000000000000000000000000000000000000C9",
"1",
"1",
"02FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE8",
"0289070FB05D38FF58321F2E800536D538CCDAA3D9",
1,
"04000000000000000000020108A2E0CC0D99F8A5EF",
"2",
163,
C2_K163
);
/* Curve B-163 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve B-163",
"0800000000000000000000000000000000000000C9",
"1",
"020A601907B8C953CA1481EB10512F78744A3205FD",
"03F0EBA16286A2D57EA0991168D4994637E8343E36",
"00D51FBC6C71A0094FA2CDD545B11C5C0C797324F1",
1,
"040000000000000000000292FE77E70C12A4234C33",
"2",
163,
C2_B163
);
/* Curve K-233 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve K-233",
"020000000000000000000000000000000000000004000000000000000001",
"0",
"1",
"017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD6126",
"01DB537DECE819B7F70F555A67C427A8CD9BF18AEB9B56E0C11056FAE6A3",
0,
"008000000000000000000000000000069D5BB915BCD46EFB1AD5F173ABDF",
"4",
233,
C2_K233
);
/* Curve B-233 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve B-233",
"020000000000000000000000000000000000000004000000000000000001",
"000000000000000000000000000000000000000000000000000000000001",
"0066647EDE6C332C7F8C0923BB58213B333B20E9CE4281FE115F7D8F90AD",
"00FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B",
"01006A08A41903350678E58528BEBF8A0BEFF867A7CA36716F7E01F81052",
1,
"01000000000000000000000000000013E974E72F8A6922031D2603CFE0D7",
"2",
233,
C2_B233
);
/* Curve K-283 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve K-283",
"0800000000000000000000000000000000000000000000000000000000000000000010A1",
"0",
"1",
"0503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC2458492836",
"01CCDA380F1C9E318D90F95D07E5426FE87E45C0E8184698E45962364E34116177DD2259",
0,
"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE9AE2ED07577265DFF7F94451E061E163C61",
"4",
283,
C2_K283
);
/* Curve B-283 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve B-283",
"0800000000000000000000000000000000000000000000000000000000000000000010A1",
"000000000000000000000000000000000000000000000000000000000000000000000001",
"027B680AC8B8596DA5A4AF8A19A0303FCA97FD7645309FA2A581485AF6263E313B79A2F5",
"05F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B12053",
"03676854FE24141CB98FE6D4B20D02B4516FF702350EDDB0826779C813F0DF45BE8112F4",
1,
"03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF90399660FC938A90165B042A7CEFADB307",
"2",
283,
C2_B283
);
/* Curve K-409 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve K-409",
"02000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000000001",
"0",
"1",
"0060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE9023746",
"01E369050B7C4E42ACBA1DACBF04299C3460782F918EA427E6325165E9EA10E3DA5F6C42E9C55215AA9CA27A5863EC48D8E0286B",
1,
"007FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE5F83B2D4EA20400EC4557D5ED3E3E7CA5B4B5C83B8E01E5FCF",
"4",
409,
C2_K409
);
/* Curve B-409 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve B-409",
"02000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000000001",
"00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
"0021A5C2C8EE9FEB5C4B9A753B7B476B7FD6422EF1F3DD674761FA99D6AC27C8A9A197B272822F6CD57A55AA4F50AE317B13545F",
"015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A7",
"0061B1CFAB6BE5F32BBFA78324ED106A7636B9C5A7BD198D0158AA4F5488D08F38514F1FDF4B4F40D2181B3681C364BA0273C706",
1,
"010000000000000000000000000000000000000000000000000001E2AAD6A612F33307BE5FA47C3C9E052F838164CD37D9A21173",
"2",
409,
C2_B409
);
/* Curve K-571 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve K-571",
"80000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000425",
"0",
"1",
"026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C8972",
"0349DC807F4FBF374F4AEADE3BCA95314DD58CEC9F307A54FFC61EFC006D8A2C9D4979C0AC44AEA74FBEBBB9F772AEDCB620B01A7BA7AF1B320430C8591984F601CD4C143EF1C7A3",
0,
"020000000000000000000000000000000000000000000000000000000000000000000000131850E1F19A63E4B391A8DB917F4138B630D84BE5D639381E91DEB45CFE778F637C1001",
"4",
571,
C2_K571
);
/* Curve B-571 (FIPS PUB 186-2, App. 6) */
CHAR2_CURVE_TEST
(
"NIST curve B-571",
"80000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000425",
"000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
"02F40E7E2221F295DE297117B7F3D62F5C6A97FFCB8CEFF1CD6BA8CE4A9A18AD84FFABBD8EFA59332BE7AD6756A66E294AFD185A78FF12AA520E4DE739BACA0C7FFEFF7F2955727A",
"0303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19",
"037BF27342DA639B6DCCFFFEB73D69D78C6C27A6009CBBCA1980F8533921E8A684423E43BAB08A576291AF8F461BB2A8B3531D2F0485C19B16E2F1516E23DD3C1A4827AF1B8AC15B",
1,
"03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE661CE18FF55987308059B186823851EC7DD9CA1161DE93D5174D66E8382E9BB2FE84E47",
"2",
571,
C2_B571
);
/* more tests using the last curve */
if (!EC_POINT_copy(Q, P)) ABORT;
if (EC_POINT_is_at_infinity(group, Q)) ABORT;
if (!EC_POINT_dbl(group, P, P, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!EC_POINT_invert(group, Q, ctx)) ABORT; /* P = -2Q */
if (!EC_POINT_add(group, R, P, Q, ctx)) ABORT;
if (!EC_POINT_add(group, R, R, Q, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, R)) ABORT; /* R = P + 2Q */
{
const EC_POINT *points[3];
const BIGNUM *scalars[3];
if (EC_POINT_is_at_infinity(group, Q)) ABORT;
points[0] = Q;
points[1] = Q;
points[2] = Q;
if (!BN_add(y, z, BN_value_one())) ABORT;
if (BN_is_odd(y)) ABORT;
if (!BN_rshift1(y, y)) ABORT;
scalars[0] = y; /* (group order + 1)/2, so y*Q + y*Q = Q */
scalars[1] = y;
fprintf(stdout, "combined multiplication ...");
fflush(stdout);
/* z is still the group order */
if (!EC_POINTs_mul(group, P, NULL, 2, points, scalars, ctx)) ABORT;
if (!EC_POINTs_mul(group, R, z, 2, points, scalars, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, R, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, R, Q, ctx)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
if (!BN_pseudo_rand(y, BN_num_bits(y), 0, 0)) ABORT;
if (!BN_add(z, z, y)) ABORT;
BN_set_negative(z, 1);
scalars[0] = y;
scalars[1] = z; /* z = -(order + y) */
if (!EC_POINTs_mul(group, P, NULL, 2, points, scalars, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
if (!BN_pseudo_rand(x, BN_num_bits(y) - 1, 0, 0)) ABORT;
if (!BN_add(z, x, y)) ABORT;
BN_set_negative(z, 1);
scalars[0] = x;
scalars[1] = y;
scalars[2] = z; /* z = -(x+y) */
if (!EC_POINTs_mul(group, P, NULL, 3, points, scalars, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
fprintf(stdout, " ok\n\n");
}
#if 0
timings(C2_K163, TIMING_BASE_PT, ctx);
timings(C2_K163, TIMING_RAND_PT, ctx);
timings(C2_K163, TIMING_SIMUL, ctx);
timings(C2_B163, TIMING_BASE_PT, ctx);
timings(C2_B163, TIMING_RAND_PT, ctx);
timings(C2_B163, TIMING_SIMUL, ctx);
timings(C2_K233, TIMING_BASE_PT, ctx);
timings(C2_K233, TIMING_RAND_PT, ctx);
timings(C2_K233, TIMING_SIMUL, ctx);
timings(C2_B233, TIMING_BASE_PT, ctx);
timings(C2_B233, TIMING_RAND_PT, ctx);
timings(C2_B233, TIMING_SIMUL, ctx);
timings(C2_K283, TIMING_BASE_PT, ctx);
timings(C2_K283, TIMING_RAND_PT, ctx);
timings(C2_K283, TIMING_SIMUL, ctx);
timings(C2_B283, TIMING_BASE_PT, ctx);
timings(C2_B283, TIMING_RAND_PT, ctx);
timings(C2_B283, TIMING_SIMUL, ctx);
timings(C2_K409, TIMING_BASE_PT, ctx);
timings(C2_K409, TIMING_RAND_PT, ctx);
timings(C2_K409, TIMING_SIMUL, ctx);
timings(C2_B409, TIMING_BASE_PT, ctx);
timings(C2_B409, TIMING_RAND_PT, ctx);
timings(C2_B409, TIMING_SIMUL, ctx);
timings(C2_K571, TIMING_BASE_PT, ctx);
timings(C2_K571, TIMING_RAND_PT, ctx);
timings(C2_K571, TIMING_SIMUL, ctx);
timings(C2_B571, TIMING_BASE_PT, ctx);
timings(C2_B571, TIMING_RAND_PT, ctx);
timings(C2_B571, TIMING_SIMUL, ctx);
#endif
if (ctx)
BN_CTX_free(ctx);
BN_free(p); BN_free(a); BN_free(b);
EC_GROUP_free(group);
EC_POINT_free(P);
EC_POINT_free(Q);
EC_POINT_free(R);
BN_free(x); BN_free(y); BN_free(z); BN_free(cof);
if (C2_K163) EC_GROUP_free(C2_K163);
if (C2_B163) EC_GROUP_free(C2_B163);
if (C2_K233) EC_GROUP_free(C2_K233);
if (C2_B233) EC_GROUP_free(C2_B233);
if (C2_K283) EC_GROUP_free(C2_K283);
if (C2_B283) EC_GROUP_free(C2_B283);
if (C2_K409) EC_GROUP_free(C2_K409);
if (C2_B409) EC_GROUP_free(C2_B409);
if (C2_K571) EC_GROUP_free(C2_K571);
if (C2_B571) EC_GROUP_free(C2_B571);
}
int verifyRingSignatureAB(data_chunk &keyImage, uint256 &txnHash, int nRingSize, const uint8_t *pPubkeys, const data_chunk &sigC, const uint8_t *pSigS)
{
// https://bitcointalk.org/index.php?topic=972541.msg10619684
// forall_{i=1..n} compute e_i=s_i*G+c_i*P_i and E_i=s_i*H(P_i)+c_i*I_j and c_{i+1}=h(P_1,...,P_n,e_i,E_i)
// check c_{n+1}=c_1
if (fDebugRingSig)
{
//LogPrintf("%s size %d\n", __func__, nRingSize); // happens often
};
if (sigC.size() != EC_SECRET_SIZE)
return errorN(1, "%s: sigC size != EC_SECRET_SIZE.", __func__);
if (keyImage.size() != EC_COMPRESSED_SIZE)
return errorN(1, "%s: keyImage size != EC_COMPRESSED_SIZE.", __func__);
int rv = 0;
uint256 tmpPkHash;
uint256 tmpHash;
uint8_t tempData[66]; // hold raw point data to hash
CHashWriter ssPkHash(SER_GETHASH, PROTOCOL_VERSION);
CHashWriter ssCjHash(SER_GETHASH, PROTOCOL_VERSION);
for (int i = 0; i < nRingSize; ++i)
{
ssPkHash.write((const char*)&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE);
};
tmpPkHash = ssPkHash.GetHash();
BN_CTX_start(bnCtx);
BIGNUM *bnC = BN_CTX_get(bnCtx);
BIGNUM *bnC1 = BN_CTX_get(bnCtx);
BIGNUM *bnT = BN_CTX_get(bnCtx);
BIGNUM *bnS = BN_CTX_get(bnCtx);
EC_POINT *ptKi = NULL;
EC_POINT *ptT1 = NULL;
EC_POINT *ptT2 = NULL;
EC_POINT *ptT3 = NULL;
EC_POINT *ptPk = NULL;
EC_POINT *ptSi = NULL;
if ( !(ptKi = EC_POINT_new(ecGrp))
|| !(ptT1 = EC_POINT_new(ecGrp))
|| !(ptT2 = EC_POINT_new(ecGrp))
|| !(ptT3 = EC_POINT_new(ecGrp))
|| !(ptPk = EC_POINT_new(ecGrp))
|| !(ptSi = EC_POINT_new(ecGrp)))
{
LogPrintf("%s: EC_POINT_new failed.\n", __func__);
rv = 1; goto End;
};
// get keyimage as point
if (!EC_POINT_oct2point(ecGrp, ptKi, &keyImage[0], EC_COMPRESSED_SIZE, bnCtx))
{
LogPrintf("%s: extract ptKi failed.\n", __func__);
rv = 1; goto End;
};
if (!bnC1 || !BN_bin2bn(&sigC[0], EC_SECRET_SIZE, bnC1))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
if (!BN_copy(bnC, bnC1))
{
LogPrintf("%s: BN_copy failed.\n", __func__);
rv = 1; goto End;
};
for (int i = 0; i < nRingSize; ++i)
{
if (!bnS || !(BN_bin2bn(&pSigS[i * EC_SECRET_SIZE], EC_SECRET_SIZE, bnS)))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 <- pk
if (!EC_POINT_oct2point(ecGrp, ptPk, &pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnCtx))
{
LogPrintf("%s: EC_POINT_oct2point failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = e_i=s_i*G+c_i*P_i
if (!EC_POINT_mul(ecGrp, ptT1, bnS, ptPk, bnC, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
if (!(EC_POINT_point2oct(ecGrp, ptT1, POINT_CONVERSION_COMPRESSED, &tempData[0], 33, bnCtx) == (int) EC_COMPRESSED_SIZE))
{
LogPrintf("%s: extract ptT1 failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 =E_i=s_i*H(P_i)+c_i*I_j
// ptT2 =H(P_i)
if (hashToEC(&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT, ptT2) != 0)
{
LogPrintf("%s: hashToEC failed.\n", __func__);
rv = 1; goto End;
};
// DEBUGGING: ------- check if we can find the signer...
// ptSi = Pi * bnT
if ((!EC_POINT_mul(ecGrp, ptSi, NULL, ptPk, bnT, bnCtx)
|| false)
&& (rv = errorN(1, "%s: EC_POINT_mul failed.", __func__)))
goto End;
if (0 == EC_POINT_cmp(ecGrp, ptSi, ptKi, bnCtx) )
LogPrintf("signer is index %d\n", i);
// DEBUGGING: - End - check if we can find the signer...
// ptT3 = s_i*ptT2
if (!EC_POINT_mul(ecGrp, ptT3, NULL, ptT2, bnS, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = c_i*I_j
if (!EC_POINT_mul(ecGrp, ptT1, NULL, ptKi, bnC, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 = ptT3 + ptT1
if (!EC_POINT_add(ecGrp, ptT2, ptT3, ptT1, bnCtx))
{
LogPrintf("%s: EC_POINT_add failed.\n", __func__);
rv = 1; goto End;
};
if (!(EC_POINT_point2oct(ecGrp, ptT2, POINT_CONVERSION_COMPRESSED, &tempData[33], 33, bnCtx) == (int) EC_COMPRESSED_SIZE))
{
LogPrintf("%s: extract ptT2 failed.\n", __func__);
rv = 1; goto End;
};
CHashWriter ssCHash(SER_GETHASH, PROTOCOL_VERSION);
ssCHash.write((const char*)tmpPkHash.begin(), 32);
ssCHash.write((const char*)&tempData[0], 66);
tmpHash = ssCHash.GetHash();
if (!bnC || !(BN_bin2bn(tmpHash.begin(), EC_SECRET_SIZE, bnC))
|| !BN_mod(bnC, bnC, bnOrder, bnCtx))
{
LogPrintf("%s: tmpHash -> bnC failed.\n", __func__);
rv = 1; goto End;
};
};
// bnT = (bnC - bnC1) % N
if (!BN_mod_sub(bnT, bnC, bnC1, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_sub failed.\n", __func__);
rv = 1; goto End;
};
// test bnT == 0 (bnC == bnC1)
if (!BN_is_zero(bnT))
{
LogPrintf("%s: signature does not verify.\n", __func__);
rv = 2;
};
End:
BN_CTX_end(bnCtx);
EC_POINT_free(ptKi);
EC_POINT_free(ptT1);
EC_POINT_free(ptT2);
EC_POINT_free(ptT3);
EC_POINT_free(ptPk);
EC_POINT_free(ptSi);
return rv;
};
void prime_field_tests()
{
BN_CTX *ctx = NULL;
BIGNUM *p, *a, *b;
EC_GROUP *group;
EC_GROUP *P_160 = NULL, *P_192 = NULL, *P_224 = NULL, *P_256 = NULL, *P_384 = NULL, *P_521 = NULL;
EC_POINT *P, *Q, *R;
BIGNUM *x, *y, *z;
unsigned char buf[100];
size_t i, len;
int k;
#if 1 /* optional */
ctx = BN_CTX_new();
if (!ctx) ABORT;
#endif
p = BN_new();
a = BN_new();
b = BN_new();
if (!p || !a || !b) ABORT;
if (!BN_hex2bn(&p, "17")) ABORT;
if (!BN_hex2bn(&a, "1")) ABORT;
if (!BN_hex2bn(&b, "1")) ABORT;
group = EC_GROUP_new(EC_GFp_mont_method()); /* applications should use EC_GROUP_new_curve_GFp
* so that the library gets to choose the EC_METHOD */
if (!group) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
{
EC_GROUP *tmp;
tmp = EC_GROUP_new(EC_GROUP_method_of(group));
if (!tmp) ABORT;
if (!EC_GROUP_copy(tmp, group)) ABORT;
EC_GROUP_free(group);
group = tmp;
}
if (!EC_GROUP_get_curve_GFp(group, p, a, b, ctx)) ABORT;
fprintf(stdout, "Curve defined by Weierstrass equation\n y^2 = x^3 + a*x + b (mod 0x");
BN_print_fp(stdout, p);
fprintf(stdout, ")\n a = 0x");
BN_print_fp(stdout, a);
fprintf(stdout, "\n b = 0x");
BN_print_fp(stdout, b);
fprintf(stdout, "\n");
P = EC_POINT_new(group);
Q = EC_POINT_new(group);
R = EC_POINT_new(group);
if (!P || !Q || !R) ABORT;
if (!EC_POINT_set_to_infinity(group, P)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
buf[0] = 0;
if (!EC_POINT_oct2point(group, Q, buf, 1, ctx)) ABORT;
if (!EC_POINT_add(group, P, P, Q, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
x = BN_new();
y = BN_new();
z = BN_new();
if (!x || !y || !z) ABORT;
if (!BN_hex2bn(&x, "D")) ABORT;
if (!EC_POINT_set_compressed_coordinates_GFp(group, Q, x, 1, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, Q, ctx))
{
if (!EC_POINT_get_affine_coordinates_GFp(group, Q, x, y, ctx)) ABORT;
fprintf(stderr, "Point is not on curve: x = 0x");
BN_print_fp(stderr, x);
fprintf(stderr, ", y = 0x");
BN_print_fp(stderr, y);
fprintf(stderr, "\n");
ABORT;
}
fprintf(stdout, "A cyclic subgroup:\n");
k = 100;
do
{
if (k-- == 0) ABORT;
if (EC_POINT_is_at_infinity(group, P))
fprintf(stdout, " point at infinity\n");
else
{
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, " x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, ", y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
}
if (!EC_POINT_copy(R, P)) ABORT;
if (!EC_POINT_add(group, P, P, Q, ctx)) ABORT;
#if 0 /* optional */
{
EC_POINT *points[3];
points[0] = R;
points[1] = Q;
points[2] = P;
if (!EC_POINTs_make_affine(group, 2, points, ctx)) ABORT;
}
#endif
}
while (!EC_POINT_is_at_infinity(group, P));
if (!EC_POINT_add(group, P, Q, R, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_COMPRESSED, buf, sizeof buf, ctx);
if (len == 0) ABORT;
if (!EC_POINT_oct2point(group, P, buf, len, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, Q, ctx)) ABORT;
fprintf(stdout, "Generator as octect string, compressed form:\n ");
for (i = 0; i < len; i++) fprintf(stdout, "%02X", buf[i]);
len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_UNCOMPRESSED, buf, sizeof buf, ctx);
if (len == 0) ABORT;
if (!EC_POINT_oct2point(group, P, buf, len, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, Q, ctx)) ABORT;
fprintf(stdout, "\nGenerator as octect string, uncompressed form:\n ");
for (i = 0; i < len; i++) fprintf(stdout, "%02X", buf[i]);
len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_HYBRID, buf, sizeof buf, ctx);
if (len == 0) ABORT;
if (!EC_POINT_oct2point(group, P, buf, len, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, Q, ctx)) ABORT;
fprintf(stdout, "\nGenerator as octect string, hybrid form:\n ");
for (i = 0; i < len; i++) fprintf(stdout, "%02X", buf[i]);
if (!EC_POINT_get_Jprojective_coordinates_GFp(group, R, x, y, z, ctx)) ABORT;
fprintf(stdout, "\nA representation of the inverse of that generator in\nJacobian projective coordinates:\n X = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, ", Y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, ", Z = 0x");
BN_print_fp(stdout, z);
fprintf(stdout, "\n");
if (!EC_POINT_invert(group, P, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, R, ctx)) ABORT;
/* Curve secp160r1 (Certicom Research SEC 2 Version 1.0, section 2.4.2, 2000)
* -- not a NIST curve, but commonly used */
if (!BN_hex2bn(&p, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF")) ABORT;
if (1 != BN_is_prime_ex(p, BN_prime_checks, ctx, NULL)) ABORT;
if (!BN_hex2bn(&a, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC")) ABORT;
if (!BN_hex2bn(&b, "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45")) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
if (!BN_hex2bn(&x, "4A96B5688EF573284664698968C38BB913CBFC82")) ABORT;
if (!BN_hex2bn(&y, "23a628553168947d59dcc912042351377ac5fb32")) ABORT;
if (!EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!BN_hex2bn(&z, "0100000000000000000001F4C8F927AED3CA752257")) ABORT;
if (!EC_GROUP_set_generator(group, P, z, BN_value_one())) ABORT;
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, "\nSEC2 curve secp160r1 -- Generator:\n x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, "\n y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
/* G_y value taken from the standard: */
if (!BN_hex2bn(&z, "23a628553168947d59dcc912042351377ac5fb32")) ABORT;
if (0 != BN_cmp(y, z)) ABORT;
fprintf(stdout, "verify degree ...");
if (EC_GROUP_get_degree(group) != 160) ABORT;
fprintf(stdout, " ok\n");
fprintf(stdout, "verify group order ...");
fflush(stdout);
if (!EC_GROUP_get_order(group, z, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
if (!EC_GROUP_precompute_mult(group, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, " ok\n");
if (!(P_160 = EC_GROUP_new(EC_GROUP_method_of(group)))) ABORT;
if (!EC_GROUP_copy(P_160, group)) ABORT;
/* Curve P-192 (FIPS PUB 186-2, App. 6) */
if (!BN_hex2bn(&p, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF")) ABORT;
if (1 != BN_is_prime_ex(p, BN_prime_checks, ctx, NULL)) ABORT;
if (!BN_hex2bn(&a, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC")) ABORT;
if (!BN_hex2bn(&b, "64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1")) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
if (!BN_hex2bn(&x, "188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012")) ABORT;
if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!BN_hex2bn(&z, "FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831")) ABORT;
if (!EC_GROUP_set_generator(group, P, z, BN_value_one())) ABORT;
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, "\nNIST curve P-192 -- Generator:\n x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, "\n y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
/* G_y value taken from the standard: */
if (!BN_hex2bn(&z, "07192B95FFC8DA78631011ED6B24CDD573F977A11E794811")) ABORT;
if (0 != BN_cmp(y, z)) ABORT;
fprintf(stdout, "verify degree ...");
if (EC_GROUP_get_degree(group) != 192) ABORT;
fprintf(stdout, " ok\n");
fprintf(stdout, "verify group order ...");
fflush(stdout);
if (!EC_GROUP_get_order(group, z, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
#if 0
if (!EC_GROUP_precompute_mult(group, ctx)) ABORT;
#endif
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, " ok\n");
if (!(P_192 = EC_GROUP_new(EC_GROUP_method_of(group)))) ABORT;
if (!EC_GROUP_copy(P_192, group)) ABORT;
/* Curve P-224 (FIPS PUB 186-2, App. 6) */
if (!BN_hex2bn(&p, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001")) ABORT;
if (1 != BN_is_prime_ex(p, BN_prime_checks, ctx, NULL)) ABORT;
if (!BN_hex2bn(&a, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE")) ABORT;
if (!BN_hex2bn(&b, "B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4")) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
if (!BN_hex2bn(&x, "B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21")) ABORT;
if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 0, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!BN_hex2bn(&z, "FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D")) ABORT;
if (!EC_GROUP_set_generator(group, P, z, BN_value_one())) ABORT;
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, "\nNIST curve P-224 -- Generator:\n x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, "\n y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
/* G_y value taken from the standard: */
if (!BN_hex2bn(&z, "BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34")) ABORT;
if (0 != BN_cmp(y, z)) ABORT;
fprintf(stdout, "verify degree ...");
if (EC_GROUP_get_degree(group) != 224) ABORT;
fprintf(stdout, " ok\n");
fprintf(stdout, "verify group order ...");
fflush(stdout);
if (!EC_GROUP_get_order(group, z, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
#if 0
if (!EC_GROUP_precompute_mult(group, ctx)) ABORT;
#endif
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, " ok\n");
if (!(P_224 = EC_GROUP_new(EC_GROUP_method_of(group)))) ABORT;
if (!EC_GROUP_copy(P_224, group)) ABORT;
/* Curve P-256 (FIPS PUB 186-2, App. 6) */
if (!BN_hex2bn(&p, "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF")) ABORT;
if (1 != BN_is_prime_ex(p, BN_prime_checks, ctx, NULL)) ABORT;
if (!BN_hex2bn(&a, "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC")) ABORT;
if (!BN_hex2bn(&b, "5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B")) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
if (!BN_hex2bn(&x, "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296")) ABORT;
if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!BN_hex2bn(&z, "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E"
"84F3B9CAC2FC632551")) ABORT;
if (!EC_GROUP_set_generator(group, P, z, BN_value_one())) ABORT;
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, "\nNIST curve P-256 -- Generator:\n x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, "\n y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
/* G_y value taken from the standard: */
if (!BN_hex2bn(&z, "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5")) ABORT;
if (0 != BN_cmp(y, z)) ABORT;
fprintf(stdout, "verify degree ...");
if (EC_GROUP_get_degree(group) != 256) ABORT;
fprintf(stdout, " ok\n");
fprintf(stdout, "verify group order ...");
fflush(stdout);
if (!EC_GROUP_get_order(group, z, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
#if 0
if (!EC_GROUP_precompute_mult(group, ctx)) ABORT;
#endif
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, " ok\n");
if (!(P_256 = EC_GROUP_new(EC_GROUP_method_of(group)))) ABORT;
if (!EC_GROUP_copy(P_256, group)) ABORT;
/* Curve P-384 (FIPS PUB 186-2, App. 6) */
if (!BN_hex2bn(&p, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF")) ABORT;
if (1 != BN_is_prime_ex(p, BN_prime_checks, ctx, NULL)) ABORT;
if (!BN_hex2bn(&a, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC")) ABORT;
if (!BN_hex2bn(&b, "B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141"
"120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF")) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
if (!BN_hex2bn(&x, "AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B"
"9859F741E082542A385502F25DBF55296C3A545E3872760AB7")) ABORT;
if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!BN_hex2bn(&z, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973")) ABORT;
if (!EC_GROUP_set_generator(group, P, z, BN_value_one())) ABORT;
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, "\nNIST curve P-384 -- Generator:\n x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, "\n y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
/* G_y value taken from the standard: */
if (!BN_hex2bn(&z, "3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A14"
"7CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F")) ABORT;
if (0 != BN_cmp(y, z)) ABORT;
fprintf(stdout, "verify degree ...");
if (EC_GROUP_get_degree(group) != 384) ABORT;
fprintf(stdout, " ok\n");
fprintf(stdout, "verify group order ...");
fflush(stdout);
if (!EC_GROUP_get_order(group, z, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
#if 0
if (!EC_GROUP_precompute_mult(group, ctx)) ABORT;
#endif
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, " ok\n");
if (!(P_384 = EC_GROUP_new(EC_GROUP_method_of(group)))) ABORT;
if (!EC_GROUP_copy(P_384, group)) ABORT;
/* Curve P-521 (FIPS PUB 186-2, App. 6) */
if (!BN_hex2bn(&p, "1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFFFFFFFFFFFF")) ABORT;
if (1 != BN_is_prime_ex(p, BN_prime_checks, ctx, NULL)) ABORT;
if (!BN_hex2bn(&a, "1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFFFFFFFFFFFC")) ABORT;
if (!BN_hex2bn(&b, "051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B"
"315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573"
"DF883D2C34F1EF451FD46B503F00")) ABORT;
if (!EC_GROUP_set_curve_GFp(group, p, a, b, ctx)) ABORT;
if (!BN_hex2bn(&x, "C6858E06B70404E9CD9E3ECB662395B4429C648139053F"
"B521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B"
"3C1856A429BF97E7E31C2E5BD66")) ABORT;
if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 0, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!BN_hex2bn(&z, "1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5"
"C9B8899C47AEBB6FB71E91386409")) ABORT;
if (!EC_GROUP_set_generator(group, P, z, BN_value_one())) ABORT;
if (!EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)) ABORT;
fprintf(stdout, "\nNIST curve P-521 -- Generator:\n x = 0x");
BN_print_fp(stdout, x);
fprintf(stdout, "\n y = 0x");
BN_print_fp(stdout, y);
fprintf(stdout, "\n");
/* G_y value taken from the standard: */
if (!BN_hex2bn(&z, "11839296A789A3BC0045C8A5FB42C7D1BD998F54449579"
"B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C"
"7086A272C24088BE94769FD16650")) ABORT;
if (0 != BN_cmp(y, z)) ABORT;
fprintf(stdout, "verify degree ...");
if (EC_GROUP_get_degree(group) != 521) ABORT;
fprintf(stdout, " ok\n");
fprintf(stdout, "verify group order ...");
fflush(stdout);
if (!EC_GROUP_get_order(group, z, ctx)) ABORT;
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
#if 0
if (!EC_GROUP_precompute_mult(group, ctx)) ABORT;
#endif
if (!EC_POINT_mul(group, Q, z, NULL, NULL, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, Q)) ABORT;
fprintf(stdout, " ok\n");
if (!(P_521 = EC_GROUP_new(EC_GROUP_method_of(group)))) ABORT;
if (!EC_GROUP_copy(P_521, group)) ABORT;
/* more tests using the last curve */
if (!EC_POINT_copy(Q, P)) ABORT;
if (EC_POINT_is_at_infinity(group, Q)) ABORT;
if (!EC_POINT_dbl(group, P, P, ctx)) ABORT;
if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT;
if (!EC_POINT_invert(group, Q, ctx)) ABORT; /* P = -2Q */
if (!EC_POINT_add(group, R, P, Q, ctx)) ABORT;
if (!EC_POINT_add(group, R, R, Q, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, R)) ABORT; /* R = P + 2Q */
{
const EC_POINT *points[3];
const BIGNUM *scalars[3];
if (EC_POINT_is_at_infinity(group, Q)) ABORT;
points[0] = Q;
points[1] = Q;
points[2] = Q;
if (!BN_add(y, z, BN_value_one())) ABORT;
if (BN_is_odd(y)) ABORT;
if (!BN_rshift1(y, y)) ABORT;
scalars[0] = y; /* (group order + 1)/2, so y*Q + y*Q = Q */
scalars[1] = y;
fprintf(stdout, "combined multiplication ...");
fflush(stdout);
/* z is still the group order */
if (!EC_POINTs_mul(group, P, NULL, 2, points, scalars, ctx)) ABORT;
if (!EC_POINTs_mul(group, R, z, 2, points, scalars, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, P, R, ctx)) ABORT;
if (0 != EC_POINT_cmp(group, R, Q, ctx)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
if (!BN_pseudo_rand(y, BN_num_bits(y), 0, 0)) ABORT;
if (!BN_add(z, z, y)) ABORT;
BN_set_negative(z, 1);
scalars[0] = y;
scalars[1] = z; /* z = -(order + y) */
if (!EC_POINTs_mul(group, P, NULL, 2, points, scalars, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
fprintf(stdout, ".");
fflush(stdout);
if (!BN_pseudo_rand(x, BN_num_bits(y) - 1, 0, 0)) ABORT;
if (!BN_add(z, x, y)) ABORT;
BN_set_negative(z, 1);
scalars[0] = x;
scalars[1] = y;
scalars[2] = z; /* z = -(x+y) */
if (!EC_POINTs_mul(group, P, NULL, 3, points, scalars, ctx)) ABORT;
if (!EC_POINT_is_at_infinity(group, P)) ABORT;
fprintf(stdout, " ok\n\n");
}
#if 0
timings(P_160, TIMING_BASE_PT, ctx);
timings(P_160, TIMING_RAND_PT, ctx);
timings(P_160, TIMING_SIMUL, ctx);
timings(P_192, TIMING_BASE_PT, ctx);
timings(P_192, TIMING_RAND_PT, ctx);
timings(P_192, TIMING_SIMUL, ctx);
timings(P_224, TIMING_BASE_PT, ctx);
timings(P_224, TIMING_RAND_PT, ctx);
timings(P_224, TIMING_SIMUL, ctx);
timings(P_256, TIMING_BASE_PT, ctx);
timings(P_256, TIMING_RAND_PT, ctx);
timings(P_256, TIMING_SIMUL, ctx);
timings(P_384, TIMING_BASE_PT, ctx);
timings(P_384, TIMING_RAND_PT, ctx);
timings(P_384, TIMING_SIMUL, ctx);
timings(P_521, TIMING_BASE_PT, ctx);
timings(P_521, TIMING_RAND_PT, ctx);
timings(P_521, TIMING_SIMUL, ctx);
#endif
if (ctx)
BN_CTX_free(ctx);
BN_free(p); BN_free(a); BN_free(b);
EC_GROUP_free(group);
EC_POINT_free(P);
EC_POINT_free(Q);
EC_POINT_free(R);
BN_free(x); BN_free(y); BN_free(z);
if (P_160) EC_GROUP_free(P_160);
if (P_192) EC_GROUP_free(P_192);
if (P_224) EC_GROUP_free(P_224);
if (P_256) EC_GROUP_free(P_256);
if (P_384) EC_GROUP_free(P_384);
if (P_521) EC_GROUP_free(P_521);
}
static int
gen_publickey_from_ec_evp(LIBSSH2_SESSION *session,
unsigned char **method,
size_t *method_len,
unsigned char **pubkeydata,
size_t *pubkeydata_len,
EVP_PKEY *pk)
{
int rc = 0;
EC_KEY *ec = NULL;
unsigned char *p;
unsigned char *method_buf = NULL;
unsigned char *key;
size_t key_len = 0;
unsigned char *octal_value = NULL;
size_t octal_len;
const EC_POINT *public_key;
const EC_GROUP *group;
BN_CTX *bn_ctx;
libssh2_curve_type type;
_libssh2_debug(session,
LIBSSH2_TRACE_AUTH,
"Computing public key from EC private key envelop");
bn_ctx = BN_CTX_new();
if(bn_ctx == NULL)
return -1;
ec = EVP_PKEY_get1_EC_KEY(pk);
if(ec == NULL) {
rc = -1;
goto clean_exit;
}
public_key = EC_KEY_get0_public_key(ec);
group = EC_KEY_get0_group(ec);
type = _libssh2_ecdsa_key_get_curve_type(ec);
method_buf = LIBSSH2_ALLOC(session, 19);
if(method_buf == NULL) {
return _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"out of memory");
}
if(type == LIBSSH2_EC_CURVE_NISTP256)
memcpy(method_buf, "ecdsa-sha2-nistp256", 19);
else if(type == LIBSSH2_EC_CURVE_NISTP384)
memcpy(method_buf, "ecdsa-sha2-nistp384", 19);
else if(type == LIBSSH2_EC_CURVE_NISTP521)
memcpy(method_buf, "ecdsa-sha2-nistp521", 19);
else {
_libssh2_debug(session,
LIBSSH2_TRACE_ERROR,
"Unsupported EC private key type");
rc = -1;
goto clean_exit;
}
/* get length */
octal_len = EC_POINT_point2oct(group, public_key, POINT_CONVERSION_UNCOMPRESSED, NULL, 0, bn_ctx);
if(octal_len > EC_MAX_POINT_LEN) {
rc = -1;
goto clean_exit;
}
octal_value = malloc(octal_len);
if(octal_value == NULL) {
rc = -1;
goto clean_exit;
}
/* convert to octal */
if(EC_POINT_point2oct(group, public_key, POINT_CONVERSION_UNCOMPRESSED,
octal_value, octal_len, bn_ctx) != octal_len) {
rc = -1;
goto clean_exit;
}
/* Key form is: type_len(4) + type(19) + domain_len(4) + domain(8) + pub_key_len(4) + pub_key(~65). */
key_len = 4 + 19 + 4 + 8 + 4 + octal_len;
key = LIBSSH2_ALLOC(session, key_len);
if(key == NULL) {
rc = -1;
goto clean_exit;
}
/* Process key encoding. */
p = key;
/* Key type */
_libssh2_store_str(&p, (const char *)method_buf, 19);
/* Name domain */
_libssh2_store_str(&p, (const char *)method_buf + 11, 8);
/* Public key */
_libssh2_store_str(&p, (const char *)octal_value, octal_len);
*method = method_buf;
*method_len = 19;
*pubkeydata = key;
*pubkeydata_len = key_len;
clean_exit:
if(ec != NULL)
EC_KEY_free(ec);
if(bn_ctx != NULL) {
BN_CTX_free(bn_ctx);
}
if(octal_value != NULL)
free(octal_value);
if(rc == 0)
return 0;
if(method_buf != NULL)
LIBSSH2_FREE(session, method_buf);
return -1;
}
int generateRingSignatureAB(data_chunk &keyImage, uint256 &txnHash, int nRingSize, int nSecretOffset, ec_secret secret, const uint8_t *pPubkeys, data_chunk &sigC, uint8_t *pSigS)
{
// https://bitcointalk.org/index.php?topic=972541.msg10619684
if (fDebugRingSig)
LogPrintf("%s: Ring size %d.\n", __func__, nRingSize);
assert(nRingSize < 200);
RandAddSeedPerfmon();
memset(pSigS, 0, EC_SECRET_SIZE * nRingSize);
int rv = 0;
int nBytes;
uint256 tmpPkHash;
uint256 tmpHash;
uint8_t tempData[66]; // hold raw point data to hash
ec_secret sAlpha;
if (0 != GenerateRandomSecret(sAlpha))
return errorN(1, "%s: GenerateRandomSecret failed.", __func__);
CHashWriter ssPkHash(SER_GETHASH, PROTOCOL_VERSION);
CHashWriter ssCjHash(SER_GETHASH, PROTOCOL_VERSION);
uint256 test;
for (int i = 0; i < nRingSize; ++i)
{
ssPkHash.write((const char*)&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE);
if (i == nSecretOffset)
continue;
int k;
// NOTE: necessary to clamp?
for (k = 0; k < 32; ++k)
{
if (1 != RAND_bytes(&pSigS[i * EC_SECRET_SIZE], 32))
return errorN(1, "%s: RAND_bytes ERR_get_error %u.", __func__, ERR_get_error());
memcpy(test.begin(), &pSigS[i * EC_SECRET_SIZE], 32);
if (test > MIN_SECRET && test < MAX_SECRET)
break;
};
if (k > 31)
return errorN(1, "%s: Failed to generate a valid key.", __func__);
};
tmpPkHash = ssPkHash.GetHash();
BN_CTX_start(bnCtx);
BIGNUM *bnT = BN_CTX_get(bnCtx);
BIGNUM *bnT2 = BN_CTX_get(bnCtx);
BIGNUM *bnS = BN_CTX_get(bnCtx);
BIGNUM *bnC = BN_CTX_get(bnCtx);
BIGNUM *bnCj = BN_CTX_get(bnCtx);
BIGNUM *bnA = BN_CTX_get(bnCtx);
EC_POINT *ptKi = NULL;
EC_POINT *ptPk = NULL;
EC_POINT *ptT1 = NULL;
EC_POINT *ptT2 = NULL;
EC_POINT *ptT3 = NULL;
EC_POINT *ptT4 = NULL;
if ( !(ptKi = EC_POINT_new(ecGrp))
|| !(ptPk = EC_POINT_new(ecGrp))
|| !(ptT1 = EC_POINT_new(ecGrp))
|| !(ptT2 = EC_POINT_new(ecGrp))
|| !(ptT3 = EC_POINT_new(ecGrp))
|| !(ptT4 = EC_POINT_new(ecGrp)))
{
LogPrintf("%s: EC_POINT_new failed.\n", __func__);
rv = 1; goto End;
};
// get keyimage as point
if (!EC_POINT_oct2point(ecGrp, ptKi, &keyImage[0], EC_COMPRESSED_SIZE, bnCtx))
{
LogPrintf("%s: extract ptKi failed.\n", __func__);
rv = 1; goto End;
};
// c_{j+1} = h(P_1,...,P_n,alpha*G,alpha*H(P_j))
if (!bnA || !(BN_bin2bn(&sAlpha.e[0], EC_SECRET_SIZE, bnA)))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = alpha * G
if (!EC_POINT_mul(ecGrp, ptT1, bnA, NULL, NULL, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT3 = H(Pj)
if (hashToEC(&pPubkeys[nSecretOffset * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT2, ptT3) != 0)
{
LogPrintf("%s: hashToEC failed.\n", __func__);
rv = 1; goto End;
};
ssCjHash.write((const char*)tmpPkHash.begin(), 32);
// ptT2 = alpha * H(P_j)
// ptT2 = alpha * ptT3
if (!EC_POINT_mul(ecGrp, ptT2, NULL, ptT3, bnA, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
if ( !(EC_POINT_point2oct(ecGrp, ptT1, POINT_CONVERSION_COMPRESSED, &tempData[0], 33, bnCtx) == (int) EC_COMPRESSED_SIZE)
|| !(EC_POINT_point2oct(ecGrp, ptT2, POINT_CONVERSION_COMPRESSED, &tempData[33], 33, bnCtx) == (int) EC_COMPRESSED_SIZE))
{
LogPrintf("%s: extract ptL and ptR failed.\n", __func__);
rv = 1; goto End;
};
ssCjHash.write((const char*)&tempData[0], 66);
tmpHash = ssCjHash.GetHash();
if (!bnC || !(BN_bin2bn(tmpHash.begin(), EC_SECRET_SIZE, bnC)) // bnC lags i by 1
|| !BN_mod(bnC, bnC, bnOrder, bnCtx))
{
LogPrintf("%s: hash -> bnC failed.\n", __func__);
rv = 1; goto End;
};
// c_{j+2} = h(P_1,...,P_n,s_{j+1}*G+c_{j+1}*P_{j+1},s_{j+1}*H(P_{j+1})+c_{j+1}*I_j)
for (int k = 0, ib = (nSecretOffset + 1) % nRingSize, i = (nSecretOffset + 2) % nRingSize;
k < nRingSize;
++k, ib=i, i=(i+1) % nRingSize)
{
if (k == nRingSize - 1)
{
// s_j = alpha - c_j*x_j mod n.
if (!bnT || !BN_bin2bn(&secret.e[0], EC_SECRET_SIZE, bnT))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
if (!BN_mul(bnT2, bnCj, bnT, bnCtx))
{
LogPrintf("%s: BN_mul failed.\n", __func__);
rv = 1; goto End;
};
if (!BN_mod_sub(bnS, bnA, bnT2, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_sub failed.\n", __func__);
rv = 1; goto End;
};
if (!bnS || (nBytes = BN_num_bytes(bnS)) > (int) EC_SECRET_SIZE
|| BN_bn2bin(bnS, &pSigS[nSecretOffset * EC_SECRET_SIZE + (EC_SECRET_SIZE-nBytes)]) != nBytes)
{
LogPrintf("%s: bnS -> pSigS failed.\n", __func__);
rv = 1; goto End;
};
if (nSecretOffset != nRingSize - 1)
break;
};
if (!bnS || !(BN_bin2bn(&pSigS[ib * EC_SECRET_SIZE], EC_SECRET_SIZE, bnS)))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
// bnC is from last round (ib)
if (!EC_POINT_oct2point(ecGrp, ptPk, &pPubkeys[ib * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnCtx))
{
LogPrintf("%s: EC_POINT_oct2point failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = s_{j+1}*G+c_{j+1}*P_{j+1}
if (!EC_POINT_mul(ecGrp, ptT1, bnS, ptPk, bnC, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
//s_{j+1}*H(P_{j+1})+c_{j+1}*I_j
if (hashToEC(&pPubkeys[ib * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT2, ptT2) != 0)
{
LogPrintf("%s: hashToEC failed.\n", __func__);
rv = 1; goto End;
};
// ptT3 = s_{j+1}*H(P_{j+1})
if (!EC_POINT_mul(ecGrp, ptT3, NULL, ptT2, bnS, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT4 = c_{j+1}*I_j
if (!EC_POINT_mul(ecGrp, ptT4, NULL, ptKi, bnC, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 = ptT3 + ptT4
if (!EC_POINT_add(ecGrp, ptT2, ptT3, ptT4, bnCtx))
{
LogPrintf("%s: EC_POINT_add failed.\n", __func__);
rv = 1; goto End;
};
if ( !(EC_POINT_point2oct(ecGrp, ptT1, POINT_CONVERSION_COMPRESSED, &tempData[0], 33, bnCtx) == (int) EC_COMPRESSED_SIZE)
|| !(EC_POINT_point2oct(ecGrp, ptT2, POINT_CONVERSION_COMPRESSED, &tempData[33], 33, bnCtx) == (int) EC_COMPRESSED_SIZE))
{
LogPrintf("%s: extract ptL and ptR failed.\n", __func__);
rv = 1; goto End;
};
CHashWriter ssCHash(SER_GETHASH, PROTOCOL_VERSION);
ssCHash.write((const char*)tmpPkHash.begin(), 32);
ssCHash.write((const char*)&tempData[0], 66);
tmpHash = ssCHash.GetHash();
if (!bnC || !(BN_bin2bn(tmpHash.begin(), EC_SECRET_SIZE, bnC)) // bnC lags i by 1
|| !BN_mod(bnC, bnC, bnOrder, bnCtx))
{
LogPrintf("%s: hash -> bnC failed.\n", __func__);
rv = 1; goto End;
};
if (i == nSecretOffset
&& !BN_copy(bnCj, bnC))
{
LogPrintf("%s: BN_copy failed.\n", __func__);
rv = 1; goto End;
};
if (i == 0)
{
memset(tempData, 0, EC_SECRET_SIZE);
if ((nBytes = BN_num_bytes(bnC)) > (int) EC_SECRET_SIZE
|| BN_bn2bin(bnC, &tempData[0 + (EC_SECRET_SIZE-nBytes)]) != nBytes)
{
LogPrintf("%s: bnC -> sigC failed.\n", __func__);
rv = 1; goto End;
};
try { sigC.resize(32); } catch (std::exception& e)
{
LogPrintf("%s: sigC.resize failed.\n", __func__);
rv = 1; goto End;
};
memcpy(&sigC[0], tempData, EC_SECRET_SIZE);
};
};
End:
EC_POINT_free(ptKi);
EC_POINT_free(ptPk);
EC_POINT_free(ptT1);
EC_POINT_free(ptT2);
EC_POINT_free(ptT3);
EC_POINT_free(ptT4);
BN_CTX_end(bnCtx);
return rv;
};
size_t EC_KEY_public_key_to_oct(const EC_KEY *key, uint8_t *out, size_t out_len) {
return EC_POINT_point2oct(EC_KEY_get0_group(key), EC_KEY_get0_public_key(key),
out, out_len, NULL);
}
static SM9Signature *SM9_do_sign_type1curve(SM9PublicParameters *mpk,
const unsigned char *dgst, size_t dgstlen, SM9PrivateKey *sk)
{
int e = 1;
SM9Signature *ret = NULL;
BN_CTX *bn_ctx = NULL;
EC_GROUP *group = NULL;
EC_POINT *point = NULL;
BN_GFP2 *w = NULL;
unsigned char *buf = NULL;
BIGNUM *r;
BIGNUM *l;
const EVP_MD *md;
int point_form = POINT_CONVERSION_UNCOMPRESSED;
size_t size;
if (!mpk || !dgst || dgstlen <= 0 || !sk) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE,
ERR_R_PASSED_NULL_PARAMETER);
return NULL;
}
if (dgstlen > EVP_MAX_MD_SIZE) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE,
SM9_R_INVALID_DIGEST);
return NULL;
}
/* BN_CTX */
if (!(bn_ctx = BN_CTX_new())) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE,
ERR_R_MALLOC_FAILURE);
goto end;
}
BN_CTX_start(bn_ctx);
/* EC_GROUP */
if (!(group = EC_GROUP_new_type1curve_ex(mpk->p,
mpk->a, mpk->b, mpk->pointP1->data, mpk->pointP1->length,
mpk->order, mpk->cofactor, bn_ctx))) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, SM9_R_INVALID_TYPE1CURVE);
goto end;
}
/* malloc */
ret = SM9Signature_new();
point = EC_POINT_new(group);
r = BN_CTX_get(bn_ctx);
l = BN_CTX_get(bn_ctx);
if (!ret || !point || !r || !l) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_MALLOC_FAILURE);
goto end;
}
/* md = mpk->hashfcn */
if (!(md = EVP_get_digestbyobj(mpk->hashfcn))) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, SM9_R_INVALID_MD);
goto end;
}
do {
/* rand r in [1, mpk->order - 1] */
do {
if (!BN_rand_range(r, mpk->order)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_BN_LIB);
goto end;
}
} while (BN_is_zero(r));
/* get w = mpk->g = e(mpk->pointP1, mpk->pointPpub) */
if (!BN_bn2gfp2(mpk->g1, w, mpk->p, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_BN_LIB);
goto end;
}
/* w = w^r = (mpk->g)^r in F_p^2 */
if (!BN_GFP2_exp(w, w, r, mpk->p, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_BN_LIB);
goto end;
}
/* prepare w buf and canonical(w, order=0) */
if (!BN_GFP2_canonical(w, NULL, &size, 0, mpk->p, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_BN_LIB);
goto end;
}
if (!(buf = OPENSSL_malloc(size))) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!BN_GFP2_canonical(w, buf, &size, 0, mpk->p, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_BN_LIB);
goto end;
}
/* ret->h = H2(H(m)||w) in range defined by mpk->order */
if (!SM9_hash2(md, &ret->h, dgst, dgstlen, buf, size, mpk->order, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_SM9_LIB);
goto end;
}
/* l = (r - ret->h) (mod mpk->order) */
if (!BN_mod_sub(l, r, ret->h, mpk->order, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_BN_LIB);
goto end;
}
/* if l == 0, re-generate r */
} while (BN_is_zero(l));
/* point = sk->prointPoint */
if (!EC_POINT_oct2point(group, point,
sk->privatePoint->data, sk->privatePoint->length, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_EC_LIB);
goto end;
}
/* sig->pointS = sk->privatePoint * l */
if (!EC_POINT_mul(group, point, NULL, point, l, bn_ctx)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_EC_LIB);
goto end;
}
if (!(size = EC_POINT_point2oct(group, point, point_form,
NULL, 0, bn_ctx))) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_EC_LIB);
goto end;
}
if (!ASN1_OCTET_STRING_set(ret->pointS, NULL, size)) {
SM9err(SM9_F_SM9_DO_SIGN_TYPE1CURVE, ERR_R_EC_LIB);
goto end;
}
if (!EC_POINT_point2oct(group, point, point_form,
ret->pointS->data, ret->pointS->length, bn_ctx)) {
goto end;
}
e = 0;
end:
if (e && ret) {
SM9Signature_free(ret);
ret = NULL;
}
if (bn_ctx) {
BN_CTX_end(bn_ctx);
}
BN_CTX_free(bn_ctx);
EC_GROUP_free(group);
EC_POINT_free(point);
BN_GFP2_free(w);
OPENSSL_free(buf);
return NULL;
}
static int extract_ec_params(CPK_MASTER_SECRET *master, CPK_PUBLIC_PARAMS *param)
{
int ret = 0;
EC_KEY *ec_key = NULL;
const EC_GROUP *ec_group;
BIGNUM *bn = BN_new();
BIGNUM *order = BN_new();
BN_CTX *ctx = BN_CTX_new();
EC_POINT *pt = NULL;
int i, bn_size, pt_size, num_factors;
const unsigned char *bn_ptr;
unsigned char *pt_ptr;
if (!bn || !order || !ctx) {
goto err;
}
if (!(ec_key = X509_ALGOR_get1_EC_KEY(master->pkey_algor))) {
goto err;
}
ec_group = EC_KEY_get0_group(ec_key);
if (!(EC_GROUP_get_order(ec_group, order, ctx))) {
goto err;
}
bn_size = BN_num_bytes(order);
pt_size = bn_size + 1;
if ((num_factors = CPK_MAP_num_factors(master->map_algor)) <= 0) {
goto err;
}
if (M_ASN1_STRING_length(master->secret_factors) != bn_size * num_factors) {
goto err;
}
if (!ASN1_STRING_set(param->public_factors, NULL, pt_size * num_factors)) {
goto err;
}
bn_ptr = M_ASN1_STRING_data(master->secret_factors);
pt_ptr = M_ASN1_STRING_data(param->public_factors);
memset(pt_ptr, 0, M_ASN1_STRING_length(param->public_factors));
if (!(pt = EC_POINT_new(ec_group))) {
goto err;
}
for (i = 0; i < num_factors; i++) {
if (!BN_bin2bn(bn_ptr, bn_size, bn)) {
goto err;
}
if (BN_is_zero(bn) || BN_cmp(bn, order) >= 0) {
goto err;
}
if (!EC_POINT_mul(ec_group, pt, bn, NULL, NULL, ctx)) {
goto err;
}
if (!EC_POINT_point2oct(ec_group, pt,
POINT_CONVERSION_COMPRESSED, pt_ptr, pt_size, ctx)) {
goto err;
}
bn_ptr += bn_size;
pt_ptr += pt_size;
}
ret = 1;
err:
if (ec_key) EC_KEY_free(ec_key);
if (bn) BN_free(bn);
if (order) BN_free(order);
if (ctx) BN_CTX_free(ctx);
if (pt) EC_POINT_free(pt);
return ret;
}
int generateRingSignature(data_chunk &keyImage, uint256 &txnHash, int nRingSize, int nSecretOffset, ec_secret secret, const uint8_t *pPubkeys, uint8_t *pSigc, uint8_t *pSigr)
{
if (fDebugRingSig)
LogPrintf("%s: Ring size %d.\n", __func__, nRingSize);
int rv = 0;
int nBytes;
BN_CTX_start(bnCtx);
BIGNUM *bnKS = BN_CTX_get(bnCtx);
BIGNUM *bnK1 = BN_CTX_get(bnCtx);
BIGNUM *bnK2 = BN_CTX_get(bnCtx);
BIGNUM *bnT = BN_CTX_get(bnCtx);
BIGNUM *bnH = BN_CTX_get(bnCtx);
BIGNUM *bnSum = BN_CTX_get(bnCtx);
EC_POINT *ptT1 = NULL;
EC_POINT *ptT2 = NULL;
EC_POINT *ptT3 = NULL;
EC_POINT *ptPk = NULL;
EC_POINT *ptKi = NULL;
EC_POINT *ptL = NULL;
EC_POINT *ptR = NULL;
uint8_t tempData[66]; // hold raw point data to hash
uint256 commitHash;
ec_secret scData1, scData2;
CHashWriter ssCommitHash(SER_GETHASH, PROTOCOL_VERSION);
ssCommitHash << txnHash;
// zero signature
memset(pSigc, 0, EC_SECRET_SIZE * nRingSize);
memset(pSigr, 0, EC_SECRET_SIZE * nRingSize);
// ks = random 256 bit int mod P
if (GenerateRandomSecret(scData1)
&& (rv = errorN(1, "%s: GenerateRandomSecret failed.", __func__)))
goto End;
if (!bnKS || !(BN_bin2bn(&scData1.e[0], EC_SECRET_SIZE, bnKS)))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
// zero sum
if (!bnSum || !(BN_zero(bnSum)))
{
LogPrintf("%s: BN_zero failed.\n", __func__);
rv = 1; goto End;
};
if ( !(ptT1 = EC_POINT_new(ecGrp))
|| !(ptT2 = EC_POINT_new(ecGrp))
|| !(ptT3 = EC_POINT_new(ecGrp))
|| !(ptPk = EC_POINT_new(ecGrp))
|| !(ptKi = EC_POINT_new(ecGrp))
|| !(ptL = EC_POINT_new(ecGrp))
|| !(ptR = EC_POINT_new(ecGrp)))
{
LogPrintf("%s: EC_POINT_new failed.\n", __func__);
rv = 1; goto End;
};
// get keyimage as point
if (!(bnT = BN_bin2bn(&keyImage[0], EC_COMPRESSED_SIZE, bnT))
|| !(ptKi) || !(ptKi = EC_POINT_bn2point(ecGrp, bnT, ptKi, bnCtx)))
{
LogPrintf("%s: extract ptKi failed.\n", __func__);
rv = 1; goto End;
};
for (int i = 0; i < nRingSize; ++i)
{
if (i == nSecretOffset)
{
// k = random 256 bit int mod P
// L = k * G
// R = k * HashToEC(PKi)
if (!EC_POINT_mul(ecGrp, ptL, bnKS, NULL, NULL, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
if (hashToEC(&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT, ptT1) != 0)
{
LogPrintf("%s: hashToEC failed.\n", __func__);
rv = 1; goto End;
};
if (!EC_POINT_mul(ecGrp, ptR, NULL, ptT1, bnKS, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
} else
{
// k1 = random 256 bit int mod P
// k2 = random 256 bit int mod P
// Li = k1 * Pi + k2 * G
// Ri = k1 * I + k2 * Hp(Pi)
// ci = k1
// ri = k2
if (GenerateRandomSecret(scData1) != 0
|| !bnK1 || !(BN_bin2bn(&scData1.e[0], EC_SECRET_SIZE, bnK1))
|| GenerateRandomSecret(scData2) != 0
|| !bnK2 || !(BN_bin2bn(&scData2.e[0], EC_SECRET_SIZE, bnK2)))
{
LogPrintf("%s: k1 and k2 failed.\n", __func__);
rv = 1; goto End;
};
// get Pk i as point
if (!(bnT = BN_bin2bn(&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT))
|| !(ptPk) || !(ptPk = EC_POINT_bn2point(ecGrp, bnT, ptPk, bnCtx)))
{
LogPrintf("%s: extract ptPk failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = k1 * Pi
if (!EC_POINT_mul(ecGrp, ptT1, NULL, ptPk, bnK1, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 = k2 * G
if (!EC_POINT_mul(ecGrp, ptT2, bnK2, NULL, NULL, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptL = ptT1 + ptT2
if (!EC_POINT_add(ecGrp, ptL, ptT1, ptT2, bnCtx))
{
LogPrintf("%s: EC_POINT_add failed.\n", __func__);
rv = 1; goto End;
};
// ptT3 = Hp(Pi)
if (hashToEC(&pPubkeys[i * EC_COMPRESSED_SIZE], EC_COMPRESSED_SIZE, bnT, ptT3) != 0)
{
LogPrintf("%s: hashToEC failed.\n", __func__);
rv = 1; goto End;
};
// ptT1 = k1 * I
if (!EC_POINT_mul(ecGrp, ptT1, NULL, ptKi, bnK1, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptT2 = k2 * ptT3
if (!EC_POINT_mul(ecGrp, ptT2, NULL, ptT3, bnK2, bnCtx))
{
LogPrintf("%s: EC_POINT_mul failed.\n", __func__);
rv = 1; goto End;
};
// ptR = ptT1 + ptT2
if (!EC_POINT_add(ecGrp, ptR, ptT1, ptT2, bnCtx))
{
LogPrintf("%s: EC_POINT_add failed.\n", __func__);
rv = 1; goto End;
};
memcpy(&pSigc[i * EC_SECRET_SIZE], &scData1.e[0], EC_SECRET_SIZE);
memcpy(&pSigr[i * EC_SECRET_SIZE], &scData2.e[0], EC_SECRET_SIZE);
// sum = (sum + sigc) % N , sigc == bnK1
if (!BN_mod_add(bnSum, bnSum, bnK1, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_add failed.\n", __func__);
rv = 1; goto End;
};
};
// -- add ptL and ptR to hash
if ( !(EC_POINT_point2oct(ecGrp, ptL, POINT_CONVERSION_COMPRESSED, &tempData[0], 33, bnCtx) == (int) EC_COMPRESSED_SIZE)
|| !(EC_POINT_point2oct(ecGrp, ptR, POINT_CONVERSION_COMPRESSED, &tempData[33], 33, bnCtx) == (int) EC_COMPRESSED_SIZE))
{
LogPrintf("%s: extract ptL and ptR failed.\n", __func__);
rv = 1; goto End;
};
ssCommitHash.write((const char*)&tempData[0], 66);
};
commitHash = ssCommitHash.GetHash();
if (!(bnH) || !(bnH = BN_bin2bn(commitHash.begin(), EC_SECRET_SIZE, bnH)))
{
LogPrintf("%s: commitHash -> bnH failed.\n", __func__);
rv = 1; goto End;
};
if (!BN_mod(bnH, bnH, bnOrder, bnCtx)) // this is necessary
{
LogPrintf("%s: BN_mod failed.\n", __func__);
rv = 1; goto End;
};
// sigc[nSecretOffset] = (bnH - bnSum) % N
if (!BN_mod_sub(bnT, bnH, bnSum, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_sub failed.\n", __func__);
rv = 1; goto End;
};
if ((nBytes = BN_num_bytes(bnT)) > (int)EC_SECRET_SIZE
|| BN_bn2bin(bnT, &pSigc[nSecretOffset * EC_SECRET_SIZE + (EC_SECRET_SIZE-nBytes)]) != nBytes)
{
LogPrintf("%s: bnT -> pSigc failed.\n", __func__);
rv = 1; goto End;
};
// sigr[nSecretOffset] = (bnKS - sigc[nSecretOffset] * bnSecret) % N
// reuse bnH for bnSecret
if (!bnH || !(BN_bin2bn(&secret.e[0], EC_SECRET_SIZE, bnH)))
{
LogPrintf("%s: BN_bin2bn failed.\n", __func__);
rv = 1; goto End;
};
// bnT = sigc[nSecretOffset] * bnSecret , TODO: mod N ?
if (!BN_mul(bnT, bnT, bnH, bnCtx))
{
LogPrintf("%s: BN_mul failed.\n", __func__);
rv = 1; goto End;
};
if (!BN_mod_sub(bnT, bnKS, bnT, bnOrder, bnCtx))
{
LogPrintf("%s: BN_mod_sub failed.\n", __func__);
rv = 1; goto End;
};
if ((nBytes = BN_num_bytes(bnT)) > (int) EC_SECRET_SIZE
|| BN_bn2bin(bnT, &pSigr[nSecretOffset * EC_SECRET_SIZE + (EC_SECRET_SIZE-nBytes)]) != nBytes)
{
LogPrintf("%s: bnT -> pSigr failed.\n", __func__);
rv = 1; goto End;
};
End:
EC_POINT_free(ptT1);
EC_POINT_free(ptT2);
EC_POINT_free(ptT3);
EC_POINT_free(ptPk);
EC_POINT_free(ptKi);
EC_POINT_free(ptL);
EC_POINT_free(ptR);
BN_CTX_end(bnCtx);
return rv;
};
int ssh_server_ecdh_init(ssh_session session, ssh_buffer packet){
/* ECDH keys */
ssh_string q_c_string;
ssh_string q_s_string;
EC_KEY *ecdh_key;
const EC_GROUP *group;
const EC_POINT *ecdh_pubkey;
bignum_CTX ctx;
/* SSH host keys (rsa,dsa,ecdsa) */
ssh_key privkey;
ssh_string sig_blob = NULL;
int len;
int rc;
/* Extract the client pubkey from the init packet */
q_c_string = ssh_buffer_get_ssh_string(packet);
if (q_c_string == NULL) {
ssh_set_error(session,SSH_FATAL, "No Q_C ECC point in packet");
return SSH_ERROR;
}
session->next_crypto->ecdh_client_pubkey = q_c_string;
/* Build server's keypair */
ctx = BN_CTX_new();
ecdh_key = EC_KEY_new_by_curve_name(NISTP256);
if (ecdh_key == NULL) {
ssh_set_error_oom(session);
BN_CTX_free(ctx);
return SSH_ERROR;
}
group = EC_KEY_get0_group(ecdh_key);
EC_KEY_generate_key(ecdh_key);
ecdh_pubkey = EC_KEY_get0_public_key(ecdh_key);
len = EC_POINT_point2oct(group,
ecdh_pubkey,
POINT_CONVERSION_UNCOMPRESSED,
NULL,
0,
ctx);
q_s_string = ssh_string_new(len);
if (q_s_string == NULL) {
EC_KEY_free(ecdh_key);
BN_CTX_free(ctx);
return SSH_ERROR;
}
EC_POINT_point2oct(group,
ecdh_pubkey,
POINT_CONVERSION_UNCOMPRESSED,
ssh_string_data(q_s_string),
len,
ctx);
BN_CTX_free(ctx);
session->next_crypto->ecdh_privkey = ecdh_key;
session->next_crypto->ecdh_server_pubkey = q_s_string;
/* build k and session_id */
rc = ecdh_build_k(session);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "Cannot build k number");
return SSH_ERROR;
}
/* privkey is not allocated */
rc = ssh_get_key_params(session, &privkey);
if (rc == SSH_ERROR) {
return SSH_ERROR;
}
rc = ssh_make_sessionid(session);
if (rc != SSH_OK) {
ssh_set_error(session, SSH_FATAL, "Could not create a session id");
return SSH_ERROR;
}
sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
if (sig_blob == NULL) {
ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
return SSH_ERROR;
}
rc = ssh_buffer_pack(session->out_buffer,
"bSSS",
SSH2_MSG_KEXDH_REPLY,
session->next_crypto->server_pubkey, /* host's pubkey */
q_s_string, /* ecdh public key */
sig_blob); /* signature blob */
ssh_string_free(sig_blob);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
SSH_LOG(SSH_LOG_PROTOCOL, "SSH_MSG_KEXDH_REPLY sent");
rc = ssh_packet_send(session);
if (rc == SSH_ERROR) {
return SSH_ERROR;
}
/* Send the MSG_NEWKEYS */
rc = ssh_buffer_add_u8(session->out_buffer, SSH2_MSG_NEWKEYS);
if (rc < 0) {
return SSH_ERROR;;
}
session->dh_handshake_state = DH_STATE_NEWKEYS_SENT;
rc = ssh_packet_send(session);
SSH_LOG(SSH_LOG_PROTOCOL, "SSH_MSG_NEWKEYS sent");
return rc;
}
/* creates a bitcoin address+private key from the SHA256
* hash of string. converts to base58 if base58 is 'true'
* returns 1 if successful, 0 if not*/
int create_address_from_string(const unsigned char *string,
unsigned char *address,
unsigned char *priv_key,
EC_GROUP *precompgroup,
bool base58,
bool debug) {
u_int8_t * hash = malloc(SHA256_DIGEST_LENGTH);
BIGNUM * n = BN_new();
//first we hash the string
SHA256 (string, strlen(string), hash);
//then we convert the hash to the BIGNUM n
n = BN_bin2bn(hash, SHA256_DIGEST_LENGTH, n);
BIGNUM * order = BN_new();
BIGNUM * nmodorder = BN_new();
BN_CTX *bnctx;
bnctx = BN_CTX_new();
//then we create a new EC group with the curve secp256k1
EC_GROUP * pgroup;
pgroup = EC_GROUP_new_by_curve_name(NID_secp256k1);
if (!pgroup) {
printf("ERROR: Couldn't get new group\n");
return 0;
}
//now we need to get the order of the group, and make sure that
//the number we use for the private key is less than or equal to
//the group order by using "nmodorder = n % order"
EC_GROUP_get_order(pgroup, order, NULL);
BN_mod(nmodorder, n, order, bnctx);
if (BN_is_zero(nmodorder)) {
printf("ERROR: SHA256(string) % order == 0. Pick another string.\n");
return 0;
}
if (debug)
printf ("Secret number: %s\n", BN_bn2dec(nmodorder));
//now we create a new EC point, ecpoint, and place in it the secp256k1
//generator point multiplied by nmodorder. this newly created
//point is the public key
EC_POINT * ecpoint = EC_POINT_new(pgroup);
if (!EC_POINT_mul(pgroup, ecpoint, nmodorder, NULL, NULL, NULL))
{
printf("ERROR: Couldn't multiply the generator point with n\n");
return 0;
}
if (debug) {
BIGNUM *x=NULL, *y=NULL;
x=BN_new();
y=BN_new();
if (!EC_POINT_get_affine_coordinates_GFp(pgroup, ecpoint, x, y, NULL)) {
printf("ERROR: Failed getting coordinates.");
//don't fail on debug fail
//return 0;
}
printf ("Public key coordinates. x: %s, y: %s\n", BN_bn2dec(x), BN_bn2dec(y));
BN_free(x);
BN_free(y);
}
//then we need to convert the public key point to data
//first we get the required size of the buffer in which the data is placed
//by passing NULL as the buffer argument to EC_POINT_point2oct
unsigned int bufsize = EC_POINT_point2oct (pgroup, ecpoint, POINT_CONVERSION_UNCOMPRESSED, NULL, 0, NULL);
u_int8_t * buffer = malloc(bufsize);
//then we place the data in the buffer
int len = EC_POINT_point2oct (pgroup, ecpoint, POINT_CONVERSION_UNCOMPRESSED, buffer, bufsize, NULL);
if (len == 0) {
printf("ERROR: Couldn't convert point to octet string.");
return 0;
}
if (debug) {
printf("DER encoded public key: ");
print_hex(buffer, len);
}
//next we need to hash the public key data. first with SHA256, then with RIPEMD160
SHA256(buffer, len, hash);
if (debug) {
printf("SHA256 hash of public key: ");
print_hex(hash, SHA256_DIGEST_LENGTH);
}
u_int8_t * ripemd = malloc(RIPEMD160_DIGEST_LENGTH+1+4);
RIPEMD160(hash, SHA256_DIGEST_LENGTH, ripemd);
if (debug) {
printf("RIPEMD160 hash of SHA256 hash: ");
print_hex(ripemd, RIPEMD160_DIGEST_LENGTH);
}
if (base58 == true) {
//here we add the version byte to the beginning of the public key and four checksum
//bytes at the end
prepare_for_address(ripemd, RIPEMD160_DIGEST_LENGTH, 0);
if (debug) {
printf("Address in hex with version byte and checksum: ");
print_hex(ripemd, RIPEMD160_DIGEST_LENGTH+1+4);
}
//and we convert the resulting data to base58
base58_encode(ripemd, RIPEMD160_DIGEST_LENGTH+1+4, address);
} else {
memcpy(address, ripemd, RIPEMD160_DIGEST_LENGTH);
}
//now we need to convert the big number nmodorder (private key) to data
int buflen = BN_num_bytes(nmodorder);
u_int8_t * buf = malloc(buflen+1+4);
int datalen;
//nmodorder is converted to binary representation
datalen = BN_bn2bin(nmodorder, buf);
if (debug) {
printf("Private key: ");
print_hex(buf, datalen);
}
if (base58 == true) {
//and we add version byte and four byte checksum to the data
prepare_for_address(buf, datalen, 0x80);
//and convert this to base58
base58_encode(buf, datalen+5, priv_key);
} else {
memcpy(priv_key, buf, datalen+5);
}
free(hash);
free(buffer);
free(ripemd);
free(buf);
BN_free(n);
BN_free(order);
BN_free(nmodorder);
if (precompgroup == NULL)
EC_GROUP_free(pgroup);
EC_POINT_free(ecpoint);
BN_CTX_free(bnctx);
return 1;
}
void *
vg_thread_loop(void *arg)
{
unsigned char hash_buf[128];
unsigned char *eckey_buf;
unsigned char hash1[32];
int i, c, len, output_interval;
int hash_len;
const BN_ULONG rekey_max = 10000000;
BN_ULONG npoints, rekey_at, nbatch;
vg_context_t *vcp = (vg_context_t *) arg;
EC_KEY *pkey = NULL;
const EC_GROUP *pgroup;
const EC_POINT *pgen;
const int ptarraysize = 256;
EC_POINT *ppnt[ptarraysize];
EC_POINT *pbatchinc;
vg_test_func_t test_func = vcp->vc_test;
vg_exec_context_t ctx;
vg_exec_context_t *vxcp;
struct timeval tvstart;
memset(&ctx, 0, sizeof(ctx));
vxcp = &ctx;
vg_exec_context_init(vcp, &ctx);
pkey = vxcp->vxc_key;
pgroup = EC_KEY_get0_group(pkey);
pgen = EC_GROUP_get0_generator(pgroup);
for (i = 0; i < ptarraysize; i++) {
ppnt[i] = EC_POINT_new(pgroup);
if (!ppnt[i]) {
fprintf(stderr, "ERROR: out of memory?\n");
exit(1);
}
}
pbatchinc = EC_POINT_new(pgroup);
if (!pbatchinc) {
fprintf(stderr, "ERROR: out of memory?\n");
exit(1);
}
BN_set_word(&vxcp->vxc_bntmp, ptarraysize);
EC_POINT_mul(pgroup, pbatchinc, &vxcp->vxc_bntmp, NULL, NULL,
vxcp->vxc_bnctx);
EC_POINT_make_affine(pgroup, pbatchinc, vxcp->vxc_bnctx);
npoints = 0;
rekey_at = 0;
nbatch = 0;
vxcp->vxc_key = pkey;
vxcp->vxc_binres[0] = vcp->vc_addrtype;
c = 0;
output_interval = 1000;
gettimeofday(&tvstart, NULL);
if (vcp->vc_format == VCF_SCRIPT) {
hash_buf[ 0] = 0x51; // OP_1
hash_buf[ 1] = 0x41; // pubkey length
// gap for pubkey
hash_buf[67] = 0x51; // OP_1
hash_buf[68] = 0xae; // OP_CHECKMULTISIG
eckey_buf = hash_buf + 2;
hash_len = 69;
} else {
eckey_buf = hash_buf;
hash_len = 65;
}
while (!vcp->vc_halt) {
if (++npoints >= rekey_at) {
vg_exec_context_upgrade_lock(vxcp);
/* Generate a new random private key */
EC_KEY_generate_key(pkey);
npoints = 0;
/* Determine rekey interval */
EC_GROUP_get_order(pgroup, &vxcp->vxc_bntmp,
vxcp->vxc_bnctx);
BN_sub(&vxcp->vxc_bntmp2,
&vxcp->vxc_bntmp,
EC_KEY_get0_private_key(pkey));
rekey_at = BN_get_word(&vxcp->vxc_bntmp2);
if ((rekey_at == BN_MASK2) || (rekey_at > rekey_max))
rekey_at = rekey_max;
assert(rekey_at > 0);
EC_POINT_copy(ppnt[0], EC_KEY_get0_public_key(pkey));
vg_exec_context_downgrade_lock(vxcp);
npoints++;
vxcp->vxc_delta = 0;
if (vcp->vc_pubkey_base)
EC_POINT_add(pgroup,
ppnt[0],
ppnt[0],
vcp->vc_pubkey_base,
vxcp->vxc_bnctx);
for (nbatch = 1;
(nbatch < ptarraysize) && (npoints < rekey_at);
nbatch++, npoints++) {
EC_POINT_add(pgroup,
ppnt[nbatch],
ppnt[nbatch-1],
pgen, vxcp->vxc_bnctx);
}
} else {
/*
* Common case
*
* EC_POINT_add() can skip a few multiplies if
* one or both inputs are affine (Z_is_one).
* This is the case for every point in ppnt, as
* well as pbatchinc.
*/
assert(nbatch == ptarraysize);
for (nbatch = 0;
(nbatch < ptarraysize) && (npoints < rekey_at);
nbatch++, npoints++) {
EC_POINT_add(pgroup,
ppnt[nbatch],
ppnt[nbatch],
pbatchinc,
vxcp->vxc_bnctx);
}
}
/*
* The single most expensive operation performed in this
* loop is modular inversion of ppnt->Z. There is an
* algorithm implemented in OpenSSL to do batched inversion
* that only does one actual BN_mod_inverse(), and saves
* a _lot_ of time.
*
* To take advantage of this, we batch up a few points,
* and feed them to EC_POINTs_make_affine() below.
*/
EC_POINTs_make_affine(pgroup, nbatch, ppnt, vxcp->vxc_bnctx);
for (i = 0; i < nbatch; i++, vxcp->vxc_delta++) {
/* Hash the public key */
len = EC_POINT_point2oct(pgroup, ppnt[i],
POINT_CONVERSION_UNCOMPRESSED,
eckey_buf,
65,
vxcp->vxc_bnctx);
assert(len == 65);
SHA256(hash_buf, hash_len, hash1);
RIPEMD160(hash1, sizeof(hash1), &vxcp->vxc_binres[1]);
switch (test_func(vxcp)) {
case 1:
npoints = 0;
rekey_at = 0;
i = nbatch;
break;
case 2:
goto out;
default:
break;
}
}
c += i;
if (c >= output_interval) {
output_interval = vg_output_timing(vcp, c, &tvstart);
if (output_interval > 250000)
output_interval = 250000;
c = 0;
}
vg_exec_context_yield(vxcp);
}
out:
vg_exec_context_del(&ctx);
vg_context_thread_exit(vcp);
for (i = 0; i < ptarraysize; i++)
if (ppnt[i])
EC_POINT_free(ppnt[i]);
if (pbatchinc)
EC_POINT_free(pbatchinc);
return NULL;
}
jbyteArray
Java_ru_ivanovpv_gorets_psm_nativelib_NativeLib_getECSharedKey( JNIEnv* env, jobject thiz,
jbyteArray privKey, jbyteArray pubKey, jint ecGroup)
{
EC_GROUP * ec_group = NULL;
EC_POINT * ec_pub = NULL;
EC_POINT * ec_res = NULL;
BN_CTX * bn_ctx = NULL;
BIGNUM * bn_priv = NULL;
jbyte * privKeyArr = NULL;
jbyte * pubKeyArr = NULL;
jbyteArray resKey = NULL;
jbyte resKeyArr[MAX_EC_KEY_SIZE];
jint privKeySize = 0;
jint pubKeySize = 0;
size_t resKeySize = 0;
if ( ((ecGroup != 1) && (ecGroup != 2) && (ecGroup != 3)) || (privKey == NULL) || (pubKey == NULL) )
{
goto cleanup;
}
privKeySize = (*env)->GetArrayLength(env, privKey);
pubKeySize = (*env)->GetArrayLength(env, pubKey);
if ( (privKeySize <= 0) || (pubKeySize <= 0) )
{
goto cleanup;
}
switch(ecGroup)
{
case 1:
if ( ( privKeySize < (112/8) ) || ( pubKeySize < (112/8+1) ) )
goto cleanup;
ec_group = EC_GROUP_new_by_curve_name(NID_secp112r1);
break;
case 2:
if ( ( privKeySize < (256/8) ) || ( pubKeySize < (256/8+1) ) )
goto cleanup;
ec_group = EC_GROUP_new_by_curve_name(NID_secp256k1);
break;
case 3:
if ( ( privKeySize < (384/8) ) || ( pubKeySize < (384/8+1) ) )
goto cleanup;
ec_group = EC_GROUP_new_by_curve_name(NID_secp384r1);
break;
default:
goto cleanup;
}
if (!ec_group)
{
goto cleanup;
}
if( (bn_priv = BN_new()) == NULL)
{
goto cleanup;
}
if( (privKeyArr = (*env)->GetByteArrayElements(env, privKey, NULL)) == NULL )
{
goto cleanup;
}
if ( BN_bin2bn((const unsigned char *)privKeyArr, (int) privKeySize, bn_priv) == NULL )
{
goto cleanup;
}
if ( (bn_ctx = BN_CTX_new()) == NULL )
{
goto cleanup;
}
if ( (ec_pub = EC_POINT_new(ec_group)) == NULL)
{
goto cleanup;
}
if( (pubKeyArr = (*env)->GetByteArrayElements(env, pubKey, NULL)) == NULL )
{
goto cleanup;
}
if ( EC_POINT_oct2point((const EC_GROUP *) ec_group, (EC_POINT *) ec_pub,
(unsigned char *) pubKeyArr, (size_t) pubKeySize, bn_ctx) == 0 )
{
goto cleanup;
}
if ( (ec_res = EC_POINT_new(ec_group)) == NULL)
{
goto cleanup;
}
if (!EC_POINT_mul((const EC_GROUP *) ec_group, ec_res, (const BIGNUM *)NULL, ec_pub, bn_priv, bn_ctx))
{
goto cleanup;
}
if ( (resKeySize = EC_POINT_point2oct((const EC_GROUP *) ec_group, (const EC_POINT *) ec_res,
POINT_CONVERSION_COMPRESSED, (unsigned char *) resKeyArr, (size_t) MAX_EC_KEY_SIZE, bn_ctx)) == 0 )
{
goto cleanup;
}
resKey = (*env)->NewByteArray(env, resKeySize);
if (resKey == NULL)
{
goto cleanup;
}
(*env)->SetByteArrayRegion(env, resKey,
0, resKeySize, (const jbyte*)resKeyArr);
memset (resKeyArr, 0, resKeySize);
cleanup:
if ( ec_group )
EC_GROUP_clear_free( ec_group );
if ( ec_pub )
EC_POINT_clear_free( ec_pub );
if ( ec_res )
EC_POINT_clear_free( ec_res );
if ( bn_priv )
BN_clear_free( bn_priv );
if ( privKeyArr )
(*env)->ReleaseByteArrayElements(env, privKey, privKeyArr, JNI_ABORT);
if ( pubKeyArr )
(*env)->ReleaseByteArrayElements(env, pubKey, pubKeyArr, JNI_ABORT);
return resKey;
}
int SM2_do_decrypt(const EVP_MD *kdf_md, const EVP_MD *mac_md,
const SM2_CIPHERTEXT_VALUE *cv, unsigned char *out, size_t *outlen,
EC_KEY *ec_key)
{
int ret = 0;
const EC_GROUP *ec_group = EC_KEY_get0_group(ec_key);
const BIGNUM *pri_key = EC_KEY_get0_private_key(ec_key);
KDF_FUNC kdf = KDF_get_x9_63(kdf_md);
EC_POINT *point = NULL;
BIGNUM *n = NULL;
BIGNUM *h = NULL;
BN_CTX *bn_ctx = NULL;
EVP_MD_CTX *md_ctx = NULL;
unsigned char buf[(OPENSSL_ECC_MAX_FIELD_BITS + 7)/4 + 1];
unsigned char mac[EVP_MAX_MD_SIZE];
unsigned int maclen;
int nbytes;
size_t size;
int i;
OPENSSL_assert(kdf_md && mac_md && cv && ec_key);
OPENSSL_assert(cv->ephem_point && cv->ciphertext);
if (!ec_group || !pri_key) {
goto end;
}
if (!kdf) {
goto end;
}
if (!out) {
*outlen = cv->ciphertext_size;
return 1;
}
if (*outlen < cv->ciphertext_size) {
goto end;
}
/* init vars */
point = EC_POINT_new(ec_group);
n = BN_new();
h = BN_new();
bn_ctx = BN_CTX_new();
md_ctx = EVP_MD_CTX_create();
if (!point || !n || !h || !bn_ctx || !md_ctx) {
goto end;
}
/* init ec domain parameters */
if (!EC_GROUP_get_order(ec_group, n, bn_ctx)) {
goto end;
}
if (!EC_GROUP_get_cofactor(ec_group, h, bn_ctx)) {
goto end;
}
nbytes = (EC_GROUP_get_degree(ec_group) + 7) / 8;
OPENSSL_assert(nbytes == BN_num_bytes(n));
#if 0
/* check sm2 curve and md is 256 bits */
OPENSSL_assert(nbytes == 32);
OPENSSL_assert(EVP_MD_size(kdf_md) == 32);
OPENSSL_assert(EVP_MD_size(mac_md) == 32);
#endif
/* B2: check [h]C1 != O */
if (!EC_POINT_mul(ec_group, point, NULL, cv->ephem_point, h, bn_ctx)) {
goto end;
}
if (EC_POINT_is_at_infinity(ec_group, point)) {
goto end;
}
/* B3: compute ECDH [d]C1 = (x2, y2) */
if (!EC_POINT_mul(ec_group, point, NULL, cv->ephem_point, pri_key, bn_ctx)) {
goto end;
}
if (!(size = EC_POINT_point2oct(ec_group, point,
POINT_CONVERSION_UNCOMPRESSED, buf, sizeof(buf), bn_ctx))) {
goto end;
}
OPENSSL_assert(size == 1 + nbytes * 2);
/* B4: compute t = KDF(x2 || y2, clen) */
*outlen = cv->ciphertext_size; //FIXME: duplicated code
kdf(buf + 1, size - 1, out, outlen);
/* B5: compute M = C2 xor t */
for (i = 0; i < cv->ciphertext_size; i++) {
out[i] ^= cv->ciphertext[i];
}
*outlen = cv->ciphertext_size;
/* B6: check Hash(x2 || M || y2) == C3 */
if (!EVP_DigestInit_ex(md_ctx, mac_md, NULL)) {
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1, nbytes)) {
goto end;
}
if (!EVP_DigestUpdate(md_ctx, out, *outlen)) {
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1 + nbytes, nbytes)) {
goto end;
}
if (!EVP_DigestFinal_ex(md_ctx, mac, &maclen)) {
goto end;
}
if (cv->mactag_size != maclen ||
memcmp(cv->mactag, mac, maclen)) {
goto end;
}
ret = 1;
end:
if (point) EC_POINT_free(point);
if (n) BN_free(n);
if (h) BN_free(h);
if (bn_ctx) BN_CTX_free(bn_ctx);
if (md_ctx) EVP_MD_CTX_destroy(md_ctx);
return ret;
}
ECPV1_KeyPair *keypair = (ECPV1_KeyPair*)obj;
ret = EC_KEY_generate_key(keypair->eckey);
if (ret == 0)
{
ret = -1;
goto final;
}
const EC_GROUP *grp = EC_KEY_get0_group(keypair->eckey);
keypair->group = grp;
EC_GROUP_get_order(grp, keypair->group_order, bnctx);
keypair->sk = EC_KEY_get0_private_key(keypair->eckey);
keypair->PK = EC_KEY_get0_public_key(keypair->eckey);
keypair->bytelen_go = BN_num_bytes(keypair->group_order);
keypair->bytelen_point = EC_POINT_point2oct(
grp, keypair->PK, POINT_CONVERSION_COMPRESSED, NULL, 0, bnctx);
ret = 0;
final:
return ret;
}
const char *ECPV1_get_name()
{
return "ECPV-aes256cbc";
}
void *ECPV1_signsess_new(void *keyobj, int bitlen_clr, int bitlen_rec, int bitlen_red)
{
