SECStatus
SGN_End(SGNContext *cx, SECItem *result)
{
unsigned char digest[HASH_LENGTH_MAX];
unsigned part1;
int signatureLen;
SECStatus rv;
SECItem digder, sigitem;
PLArenaPool *arena = 0;
SECKEYPrivateKey *privKey = cx->key;
SGNDigestInfo *di = 0;
result->data = 0;
digder.data = 0;
/* Finish up digest function */
if (cx->hashcx == NULL) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
(*cx->hashobj->end)(cx->hashcx, digest, &part1, sizeof(digest));
if (privKey->keyType == rsaKey) {
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( !arena ) {
rv = SECFailure;
goto loser;
}
/* Construct digest info */
di = SGN_CreateDigestInfo(cx->hashalg, digest, part1);
if (!di) {
rv = SECFailure;
goto loser;
}
/* Der encode the digest as a DigestInfo */
rv = DER_Encode(arena, &digder, SGNDigestInfoTemplate,
di);
if (rv != SECSuccess) {
goto loser;
}
} else {
digder.data = digest;
digder.len = part1;
}
/*
** Encrypt signature after constructing appropriate PKCS#1 signature
** block
*/
signatureLen = PK11_SignatureLen(privKey);
if (signatureLen <= 0) {
PORT_SetError(SEC_ERROR_INVALID_KEY);
rv = SECFailure;
goto loser;
}
sigitem.len = signatureLen;
sigitem.data = (unsigned char*) PORT_Alloc(signatureLen);
if (sigitem.data == NULL) {
rv = SECFailure;
goto loser;
}
rv = PK11_Sign(privKey, &sigitem, &digder);
if (rv != SECSuccess) {
PORT_Free(sigitem.data);
sigitem.data = NULL;
goto loser;
}
if ((cx->signalg == SEC_OID_ANSIX9_DSA_SIGNATURE) ||
(cx->signalg == SEC_OID_ANSIX962_EC_PUBLIC_KEY)) {
/* DSAU_EncodeDerSigWithLen works for DSA and ECDSA */
rv = DSAU_EncodeDerSigWithLen(result, &sigitem, sigitem.len);
PORT_Free(sigitem.data);
if (rv != SECSuccess)
goto loser;
} else {
result->len = sigitem.len;
result->data = sigitem.data;
}
loser:
SGN_DestroyDigestInfo(di);
if (arena != NULL) {
PORT_FreeArena(arena, PR_FALSE);
}
return rv;
}
SECStatus
SGN_Digest(SECKEYPrivateKey *privKey,
SECOidTag algtag, SECItem *result, SECItem *digest)
{
int modulusLen;
SECStatus rv;
SECItem digder;
PLArenaPool *arena = 0;
SGNDigestInfo *di = 0;
result->data = 0;
if (privKey->keyType == rsaKey) {
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( !arena ) {
rv = SECFailure;
goto loser;
}
/* Construct digest info */
di = SGN_CreateDigestInfo(algtag, digest->data, digest->len);
if (!di) {
rv = SECFailure;
goto loser;
}
/* Der encode the digest as a DigestInfo */
rv = DER_Encode(arena, &digder, SGNDigestInfoTemplate,
di);
if (rv != SECSuccess) {
goto loser;
}
} else {
digder.data = digest->data;
digder.len = digest->len;
}
/*
** Encrypt signature after constructing appropriate PKCS#1 signature
** block
*/
modulusLen = PK11_SignatureLen(privKey);
if (modulusLen <= 0) {
PORT_SetError(SEC_ERROR_INVALID_KEY);
rv = SECFailure;
goto loser;
}
result->len = modulusLen;
result->data = (unsigned char*) PORT_Alloc(modulusLen);
result->type = siBuffer;
if (result->data == NULL) {
rv = SECFailure;
goto loser;
}
rv = PK11_Sign(privKey, result, &digder);
if (rv != SECSuccess) {
PORT_Free(result->data);
result->data = NULL;
}
loser:
SGN_DestroyDigestInfo(di);
if (arena != NULL) {
PORT_FreeArena(arena, PR_FALSE);
}
return rv;
}
SGNDigestInfo *
SGN_CreateDigestInfo(SECOidTag algorithm, const unsigned char *sig,
unsigned len)
{
SGNDigestInfo *di;
SECStatus rv;
PLArenaPool *arena;
SECItem *null_param;
SECItem dummy_value;
switch (algorithm) {
case SEC_OID_MD2:
case SEC_OID_MD5:
case SEC_OID_SHA1:
case SEC_OID_SHA224:
case SEC_OID_SHA256:
case SEC_OID_SHA384:
case SEC_OID_SHA512:
break;
default:
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
return NULL;
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (arena == NULL) {
return NULL;
}
di = (SGNDigestInfo *) PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
if (di == NULL) {
PORT_FreeArena(arena, PR_FALSE);
return NULL;
}
di->arena = arena;
/*
* PKCS #1 specifies that the AlgorithmID must have a NULL parameter
* (as opposed to no parameter at all).
*/
dummy_value.data = NULL;
dummy_value.len = 0;
null_param = SEC_ASN1EncodeItem(NULL, NULL, &dummy_value, SEC_NullTemplate);
if (null_param == NULL) {
goto loser;
}
rv = SECOID_SetAlgorithmID(arena, &di->digestAlgorithm, algorithm,
null_param);
SECITEM_FreeItem(null_param, PR_TRUE);
if (rv != SECSuccess) {
goto loser;
}
di->digest.data = (unsigned char *) PORT_ArenaAlloc(arena, len);
if (di->digest.data == NULL) {
goto loser;
}
di->digest.len = len;
PORT_Memcpy(di->digest.data, sig, len);
return di;
loser:
SGN_DestroyDigestInfo(di);
return NULL;
}
SECStatus
SGN_End(SGNContext *cx, SECItem *result)
{
unsigned char digest[HASH_LENGTH_MAX];
unsigned part1;
int signatureLen;
SECStatus rv;
SECItem digder, sigitem;
PLArenaPool *arena = 0;
SECKEYPrivateKey *privKey = cx->key;
SGNDigestInfo *di = 0;
result->data = 0;
digder.data = 0;
sigitem.data = 0;
/* Finish up digest function */
if (cx->hashcx == NULL) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
(*cx->hashobj->end)(cx->hashcx, digest, &part1, sizeof(digest));
if (privKey->keyType == rsaKey &&
cx->signalg != SEC_OID_PKCS1_RSA_PSS_SIGNATURE) {
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
rv = SECFailure;
goto loser;
}
/* Construct digest info */
di = SGN_CreateDigestInfo(cx->hashalg, digest, part1);
if (!di) {
rv = SECFailure;
goto loser;
}
/* Der encode the digest as a DigestInfo */
rv = DER_Encode(arena, &digder, SGNDigestInfoTemplate,
di);
if (rv != SECSuccess) {
goto loser;
}
} else {
digder.data = digest;
digder.len = part1;
}
/*
** Encrypt signature after constructing appropriate PKCS#1 signature
** block
*/
signatureLen = PK11_SignatureLen(privKey);
if (signatureLen <= 0) {
PORT_SetError(SEC_ERROR_INVALID_KEY);
rv = SECFailure;
goto loser;
}
sigitem.len = signatureLen;
sigitem.data = (unsigned char *)PORT_Alloc(signatureLen);
if (sigitem.data == NULL) {
rv = SECFailure;
goto loser;
}
if (cx->signalg == SEC_OID_PKCS1_RSA_PSS_SIGNATURE) {
CK_RSA_PKCS_PSS_PARAMS mech;
SECItem mechItem = { siBuffer, (unsigned char *)&mech, sizeof(mech) };
PORT_Memset(&mech, 0, sizeof(mech));
if (cx->params && cx->params->data) {
SECKEYRSAPSSParams params;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
rv = SECFailure;
goto loser;
}
PORT_Memset(¶ms, 0, sizeof(params));
rv = SEC_QuickDERDecodeItem(arena, ¶ms,
SECKEY_RSAPSSParamsTemplate,
cx->params);
if (rv != SECSuccess) {
goto loser;
}
rv = sec_RSAPSSParamsToMechanism(&mech, ¶ms);
if (rv != SECSuccess) {
goto loser;
}
} else {
mech.hashAlg = CKM_SHA_1;
mech.mgf = CKG_MGF1_SHA1;
mech.sLen = digder.len;
}
rv = PK11_SignWithMechanism(privKey, CKM_RSA_PKCS_PSS, &mechItem,
&sigitem, &digder);
if (rv != SECSuccess) {
goto loser;
}
} else {
rv = PK11_Sign(privKey, &sigitem, &digder);
if (rv != SECSuccess) {
goto loser;
}
}
if ((cx->signalg == SEC_OID_ANSIX9_DSA_SIGNATURE) ||
(cx->signalg == SEC_OID_ANSIX962_EC_PUBLIC_KEY)) {
/* DSAU_EncodeDerSigWithLen works for DSA and ECDSA */
rv = DSAU_EncodeDerSigWithLen(result, &sigitem, sigitem.len);
if (rv != SECSuccess)
goto loser;
SECITEM_FreeItem(&sigitem, PR_FALSE);
} else {
result->len = sigitem.len;
result->data = sigitem.data;
}
loser:
if (rv != SECSuccess) {
SECITEM_FreeItem(&sigitem, PR_FALSE);
}
SGN_DestroyDigestInfo(di);
if (arena != NULL) {
PORT_FreeArena(arena, PR_FALSE);
}
return rv;
}
unsigned int NSSCryptoKeyRSA::signSHA1PKCS1Base64Signature(unsigned char * hashBuf,
unsigned int hashLen,
char * base64SignatureBuf,
unsigned int base64SignatureBufLen,
hashMethod hm) {
// Sign a pre-calculated hash using this key
if (mp_privkey == 0) {
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Attempt to sign data using a public or un-loaded key");
}
unsigned char * rawSig;
XSECnew(rawSig, unsigned char[base64SignatureBufLen]);
ArrayJanitor<unsigned char> j_rawSig(rawSig);
SECItem signature;
signature.type = siBuffer;
signature.data = rawSig;
signature.len = base64SignatureBufLen;
SECItem data;
data.data = 0;
SECOidTag hashalg;
PRArenaPool * arena = 0;
SGNDigestInfo *di = 0;
SECItem * res;
switch (hm) {
case (HASH_MD5):
hashalg = SEC_OID_MD5;
break;
case (HASH_SHA1):
hashalg = SEC_OID_SHA1;
break;
case (HASH_SHA256):
hashalg = SEC_OID_SHA256;
break;
case (HASH_SHA384):
hashalg = SEC_OID_SHA384;
break;
case (HASH_SHA512):
hashalg = SEC_OID_SHA512;
break;
default:
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Unsupported hash algorithm in RSA sign");
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error creating arena");
}
di = SGN_CreateDigestInfo(hashalg, hashBuf, hashLen);
if (di == NULL) {
PORT_FreeArena(arena, PR_FALSE);
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error creating digest info");
}
res = SEC_ASN1EncodeItem(arena, &data, di, NSS_Get_sgn_DigestInfoTemplate(NULL, 0));
if (!res) {
SGN_DestroyDigestInfo(di);
PORT_FreeArena(arena, PR_FALSE);
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error encoding digest info for RSA sign");
}
/* data.type = siBuffer;
data.data = hashBuf;
data.len = hashLen;*/
/* As of V1.3.1 - create a DigestInfo block */
SECStatus s = PK11_Sign(mp_privkey, &signature, &data);
SGN_DestroyDigestInfo(di);
PORT_FreeArena(arena, PR_FALSE);
if (s != SECSuccess) {
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error during signing operation");
}
// Now encode
XSCryptCryptoBase64 b64;
b64.encodeInit();
unsigned int ret = b64.encode(signature.data, signature.len, (unsigned char *) base64SignatureBuf, base64SignatureBufLen);
ret += b64.encodeFinish((unsigned char *) &base64SignatureBuf[ret], base64SignatureBufLen - ret);
return ret;
}
bool NSSCryptoKeyRSA::verifySHA1PKCS1Base64Signature(const unsigned char * hashBuf,
unsigned int hashLen,
const char * base64Signature,
unsigned int sigLen,
hashMethod hm) {
// Use the currently loaded key to validate the Base64 encoded signature
if (mp_pubkey == 0) {
// Try to import from the parameters
importKey();
if (mp_pubkey == 0) {
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Attempt to validate signature with empty key");
}
}
// Decode the signature
unsigned char * rawSig;
unsigned int rawSigLen;
XSECnew(rawSig, unsigned char[sigLen]);
ArrayJanitor<unsigned char> j_rawSig(rawSig);
// Decode the signature
XSCryptCryptoBase64 b64;
b64.decodeInit();
rawSigLen = b64.decode((unsigned char *) base64Signature, sigLen, rawSig, sigLen);
rawSigLen += b64.decodeFinish(&rawSig[rawSigLen], sigLen - rawSigLen);
SECItem signature;
signature.type = siBuffer;
signature.data = rawSig;
signature.len = rawSigLen;
SECItem data;
data.data = 0;
data.len = 0;
SECOidTag hashalg;
PRArenaPool * arena = 0;
SGNDigestInfo *di = 0;
SECItem * res;
switch (hm) {
case (HASH_MD5):
hashalg = SEC_OID_MD5;
break;
case (HASH_SHA1):
hashalg = SEC_OID_SHA1;
break;
case (HASH_SHA256):
hashalg = SEC_OID_SHA256;
break;
case (HASH_SHA384):
hashalg = SEC_OID_SHA384;
break;
case (HASH_SHA512):
hashalg = SEC_OID_SHA512;
break;
default:
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Unsupported hash algorithm in RSA sign");
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error creating arena");
}
di = SGN_CreateDigestInfo(hashalg, (unsigned char * )hashBuf, hashLen);
if (di == NULL) {
PORT_FreeArena(arena, PR_FALSE);
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error creating digest info");
}
res = SEC_ASN1EncodeItem(arena, &data, di, NSS_Get_sgn_DigestInfoTemplate(NULL, 0));
if (!res) {
SGN_DestroyDigestInfo(di);
PORT_FreeArena(arena, PR_FALSE);
throw XSECCryptoException(XSECCryptoException::RSAError,
"NSS:RSA - Error encoding digest info for RSA sign");
}
// Verify signature
SECStatus s = PK11_Verify(mp_pubkey, &signature, &data, NULL);
return s == SECSuccess;
}
/* search a certificate list for a nickname, a thumbprint, or both
* within a certificate bag. if the certificate could not be
* found or an error occurs, NULL is returned;
*/
static SEC_PKCS12CertAndCRL *
sec_pkcs12_find_cert_in_certbag(SEC_PKCS12CertAndCRLBag *certbag,
SECItem *nickname, SGNDigestInfo *thumbprint)
{
PRBool search_both = PR_FALSE, search_nickname = PR_FALSE;
int i, j;
if((certbag == NULL) || ((nickname == NULL) && (thumbprint == NULL))) {
return NULL;
}
if(thumbprint && nickname) {
search_both = PR_TRUE;
}
if(nickname) {
search_nickname = PR_TRUE;
}
search_again:
i = 0;
while(certbag->certAndCRLs[i] != NULL) {
SEC_PKCS12CertAndCRL *cert = certbag->certAndCRLs[i];
if(SECOID_FindOIDTag(&cert->BagID) == SEC_OID_PKCS12_X509_CERT_CRL_BAG) {
/* check nicknames */
if(search_nickname) {
if(SECITEM_CompareItem(nickname, &cert->nickname) == SECEqual) {
return cert;
}
} else {
/* check thumbprints */
SECItem **derCertList;
/* get pointer to certificate list, does not need to
* be freed since it is within the arena which will
* be freed later.
*/
derCertList = SEC_PKCS7GetCertificateList(&cert->value.x509->certOrCRL);
j = 0;
if(derCertList != NULL) {
while(derCertList[j] != NULL) {
SECComparison eq;
SGNDigestInfo *di;
di = sec_pkcs12_compute_thumbprint(derCertList[j]);
if(di) {
eq = SGN_CompareDigestInfo(thumbprint, di);
SGN_DestroyDigestInfo(di);
if(eq == SECEqual) {
/* copy the derCert for later reference */
cert->value.x509->derLeafCert = derCertList[j];
return cert;
}
} else {
/* an error occurred */
return NULL;
}
j++;
}
}
}
}
i++;
}
if(search_both) {
search_both = PR_FALSE;
search_nickname = PR_FALSE;
goto search_again;
}
return NULL;
}
