void
EC_KEY_set_conv_form(EC_KEY * key, point_conversion_form_t cform)
{
key->conv_form = cform;
if (key->group != NULL)
EC_GROUP_set_point_conversion_form(key->group, cform);
}
static int generate_ec_keypair(EVP_PKEY* pkey, const keymaster_ec_keygen_params_t* ec_params) {
Unique_EC_GROUP group;
switch (ec_params->field_size) {
case 224:
group.reset(EC_GROUP_new_by_curve_name(NID_secp224r1));
break;
case 256:
group.reset(EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1));
break;
case 384:
group.reset(EC_GROUP_new_by_curve_name(NID_secp384r1));
break;
case 521:
group.reset(EC_GROUP_new_by_curve_name(NID_secp521r1));
break;
default:
break;
}
if (group.get() == NULL) {
logOpenSSLError("generate_ec_keypair");
return -1;
}
#if !defined(OPENSSL_IS_BORINGSSL)
EC_GROUP_set_point_conversion_form(group.get(), POINT_CONVERSION_UNCOMPRESSED);
EC_GROUP_set_asn1_flag(group.get(), OPENSSL_EC_NAMED_CURVE);
#endif
/* initialize EC key */
Unique_EC_KEY eckey(EC_KEY_new());
if (eckey.get() == NULL) {
logOpenSSLError("generate_ec_keypair");
return -1;
}
if (EC_KEY_set_group(eckey.get(), group.get()) != 1) {
logOpenSSLError("generate_ec_keypair");
return -1;
}
if (EC_KEY_generate_key(eckey.get()) != 1 || EC_KEY_check_key(eckey.get()) < 0) {
logOpenSSLError("generate_ec_keypair");
return -1;
}
if (EVP_PKEY_assign_EC_KEY(pkey, eckey.get()) == 0) {
logOpenSSLError("generate_ec_keypair");
return -1;
}
release_because_ownership_transferred(eckey);
return 0;
}
/**
* eccx08_eckey_convert()
*
* \brief Converts raw 64 bytes of public key (ATECC508 format) to the
* openssl EC_KEY structure. It allocates EC_KEY structure and
* does not free it (must be a caller to free)
*
* \param[out] p_eckey Pointer to EC_KEY with Public Key on success
* \param[in] raw_pubkey Raw public key, 64 bytes length 32-byte X following with 32-byte Y
* \param[in] serial_number 9 bytes of ATECCX08 serial number
* \param[in] serial_len Size of the ATECCX08 serial number buffer
* \return 1 on success, 0 on error
*/
int eccx08_eckey_convert(EC_KEY **p_eckey, uint8_t *raw_pubkey, uint8_t *serial_number, int serial_len)
{
int rc = 0;
int ret = 0;
EC_GROUP *ecgroup = NULL, *ecgroup_old = NULL;
EC_KEY *eckey = *p_eckey;
EC_POINT *ecpoint = NULL;
BN_CTX *bnctx = NULL;
int asn1_flag = OPENSSL_EC_NAMED_CURVE;
point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
char tmp_buf[MEM_BLOCK_SIZE * 2 + 1];
/* Openssl raw key has a leading byte with conversion form id */
tmp_buf[0] = POINT_CONVERSION_UNCOMPRESSED;
memcpy(&tmp_buf[1], raw_pubkey, MEM_BLOCK_SIZE * 2);
if (!eckey) {
eckey = EC_KEY_new();
if (!eckey) goto done;
}
ecgroup = eckey->group;
if (!ecgroup) {
ecgroup = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1);
if (!ecgroup) goto done;
EC_GROUP_set_point_conversion_form(ecgroup, form);
EC_GROUP_set_asn1_flag(ecgroup, asn1_flag);
}
if (!eckey->group) {
ret = EC_KEY_set_group(eckey, ecgroup);
if (!ret) goto done;
}
ret = eccx08_generate_key(eckey, serial_number, serial_len);
if (!ret) goto done;
ecgroup = eckey->group;
ecpoint = eckey->pub_key;
if (!ecpoint) {
ecpoint = EC_POINT_new(ecgroup);
if (!ecpoint) goto done;
}
ret = EC_POINT_oct2point(ecgroup, ecpoint, tmp_buf, MEM_BLOCK_SIZE * 2 + 1, NULL);
if (!ret) goto done;
*p_eckey = eckey;
rc = 1;
done:
return (rc);
}
u2fs_rc decode_user_key(const unsigned char *data, u2fs_EC_KEY_t ** key)
{
if (key == NULL)
return U2FS_MEMORY_ERROR;
EC_GROUP *ecg = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1);
*key = (u2fs_EC_KEY_t *) EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
EC_POINT *point = EC_POINT_new(ecg);
point_conversion_form_t pcf = POINT_CONVERSION_UNCOMPRESSED;
EC_GROUP_set_point_conversion_form(ecg, pcf);
if (EC_POINT_oct2point(ecg, point, data, U2FS_PUBLIC_KEY_LEN, NULL) == 0) {
if (debug) {
unsigned long err = 0;
err = ERR_get_error();
fprintf(stderr, "Error: %s, %s, %s\n",
ERR_lib_error_string(err),
ERR_func_error_string(err), ERR_reason_error_string(err));
}
*key = NULL;
EC_GROUP_free(ecg);
ecg = NULL;
EC_POINT_free(point);
point = NULL;
return U2FS_CRYPTO_ERROR;
}
EC_GROUP_free(ecg);
ecg = NULL;
if (EC_KEY_set_public_key((EC_KEY *) * key, point) == 0) {
if (debug) {
unsigned long err = 0;
err = ERR_get_error();
fprintf(stderr, "Error: %s, %s, %s\n",
ERR_lib_error_string(err),
ERR_func_error_string(err), ERR_reason_error_string(err));
}
*key = NULL;
EC_POINT_free(point);
point = NULL;
return U2FS_CRYPTO_ERROR;
}
EC_POINT_free(point);
point = NULL;
return U2FS_OK;
}
static int openssl_ec_group_point_conversion_form(lua_State*L)
{
EC_GROUP* group = CHECK_OBJECT(1, EC_GROUP, "openssl.ec_group");
point_conversion_form_t form = 0;
if (lua_isnone(L, 2))
{
form = EC_GROUP_get_point_conversion_form(group);
if (form == POINT_CONVERSION_COMPRESSED)
lua_pushstring(L, "compressed");
else if (form == POINT_CONVERSION_UNCOMPRESSED)
lua_pushstring(L, "uncompressed");
else if (form == POINT_CONVERSION_HYBRID)
lua_pushstring(L, "hybrid");
else
lua_pushnil(L);
lua_pushinteger(L, form);
return 2;
} else if (lua_isstring(L, 2))
{
const char* options[] = {"compressed", "uncompressed", "hybrid", NULL};
int f = luaL_checkoption(L, 2, NULL, options);
if (f == 0)
form = POINT_CONVERSION_COMPRESSED;
else if (f == 1)
form = POINT_CONVERSION_UNCOMPRESSED;
else if (f == 2)
form = POINT_CONVERSION_HYBRID;
else
luaL_argerror(L, 2, "not accept value point_conversion_form");
EC_GROUP_set_point_conversion_form(group, form);
} else if (lua_isnumber(L, 2))
{
form = luaL_checkint(L, 2);
EC_GROUP_set_point_conversion_form(group, form);
} else
luaL_argerror(L, 2, "not accept type of point_conversion_form");
return 0;
}
static int createNewKey(EC_GROUP *group, EC_KEY *eckey) {
int asn1Flag = OPENSSL_EC_NAMED_CURVE;
int form = POINT_CONVERSION_UNCOMPRESSED;
EC_GROUP_set_asn1_flag(group, asn1Flag);
EC_GROUP_set_point_conversion_form(group, form);
int setGroupError = EC_KEY_set_group(eckey, group);
int resultFromKeyGen = EC_KEY_generate_key(eckey);
if (resultFromKeyGen != 1 || setGroupError != 1){
return ERROR;
}
return NOERROR;
}
int
ecparam_main(int argc, char **argv)
{
EC_GROUP *group = NULL;
point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
int new_form = 0;
int asn1_flag = OPENSSL_EC_NAMED_CURVE;
int new_asn1_flag = 0;
char *curve_name = NULL, *inrand = NULL;
int list_curves = 0, no_seed = 0, check = 0, badops = 0, text = 0,
i, genkey = 0;
char *infile = NULL, *outfile = NULL, *prog;
BIO *in = NULL, *out = NULL;
int informat, outformat, noout = 0, C = 0, ret = 1;
char *engine = NULL;
BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL, *ec_gen = NULL,
*ec_order = NULL, *ec_cofactor = NULL;
unsigned char *buffer = NULL;
if (!load_config(bio_err, NULL))
goto end;
informat = FORMAT_PEM;
outformat = FORMAT_PEM;
prog = argv[0];
argc--;
argv++;
while (argc >= 1) {
if (strcmp(*argv, "-inform") == 0) {
if (--argc < 1)
goto bad;
informat = str2fmt(*(++argv));
} else if (strcmp(*argv, "-outform") == 0) {
if (--argc < 1)
goto bad;
outformat = str2fmt(*(++argv));
} else if (strcmp(*argv, "-in") == 0) {
if (--argc < 1)
goto bad;
infile = *(++argv);
} else if (strcmp(*argv, "-out") == 0) {
if (--argc < 1)
goto bad;
outfile = *(++argv);
} else if (strcmp(*argv, "-text") == 0)
text = 1;
else if (strcmp(*argv, "-C") == 0)
C = 1;
else if (strcmp(*argv, "-check") == 0)
check = 1;
else if (strcmp(*argv, "-name") == 0) {
if (--argc < 1)
goto bad;
curve_name = *(++argv);
} else if (strcmp(*argv, "-list_curves") == 0)
list_curves = 1;
else if (strcmp(*argv, "-conv_form") == 0) {
if (--argc < 1)
goto bad;
++argv;
new_form = 1;
if (strcmp(*argv, "compressed") == 0)
form = POINT_CONVERSION_COMPRESSED;
else if (strcmp(*argv, "uncompressed") == 0)
form = POINT_CONVERSION_UNCOMPRESSED;
else if (strcmp(*argv, "hybrid") == 0)
form = POINT_CONVERSION_HYBRID;
else
goto bad;
} else if (strcmp(*argv, "-param_enc") == 0) {
if (--argc < 1)
goto bad;
++argv;
new_asn1_flag = 1;
if (strcmp(*argv, "named_curve") == 0)
asn1_flag = OPENSSL_EC_NAMED_CURVE;
else if (strcmp(*argv, "explicit") == 0)
asn1_flag = 0;
else
goto bad;
} else if (strcmp(*argv, "-no_seed") == 0)
no_seed = 1;
else if (strcmp(*argv, "-noout") == 0)
noout = 1;
else if (strcmp(*argv, "-genkey") == 0) {
genkey = 1;
} else if (strcmp(*argv, "-rand") == 0) {
if (--argc < 1)
goto bad;
inrand = *(++argv);
} else if (strcmp(*argv, "-engine") == 0) {
if (--argc < 1)
goto bad;
engine = *(++argv);
} else {
BIO_printf(bio_err, "unknown option %s\n", *argv);
badops = 1;
break;
}
argc--;
argv++;
}
if (badops) {
bad:
BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
BIO_printf(bio_err, "where options are\n");
BIO_printf(bio_err, " -inform arg input format - "
"default PEM (DER or PEM)\n");
BIO_printf(bio_err, " -outform arg output format - "
"default PEM\n");
BIO_printf(bio_err, " -in arg input file - "
"default stdin\n");
BIO_printf(bio_err, " -out arg output file - "
"default stdout\n");
BIO_printf(bio_err, " -noout do not print the "
"ec parameter\n");
BIO_printf(bio_err, " -text print the ec "
"parameters in text form\n");
BIO_printf(bio_err, " -check validate the ec "
"parameters\n");
BIO_printf(bio_err, " -C print a 'C' "
"function creating the parameters\n");
BIO_printf(bio_err, " -name arg use the "
"ec parameters with 'short name' name\n");
BIO_printf(bio_err, " -list_curves prints a list of "
"all currently available curve 'short names'\n");
BIO_printf(bio_err, " -conv_form arg specifies the "
"point conversion form \n");
BIO_printf(bio_err, " possible values:"
" compressed\n");
BIO_printf(bio_err, " "
" uncompressed (default)\n");
BIO_printf(bio_err, " "
" hybrid\n");
BIO_printf(bio_err, " -param_enc arg specifies the way"
" the ec parameters are encoded\n");
BIO_printf(bio_err, " in the asn1 der "
"encoding\n");
BIO_printf(bio_err, " possible values:"
" named_curve (default)\n");
BIO_printf(bio_err, " "
" explicit\n");
BIO_printf(bio_err, " -no_seed if 'explicit'"
" parameters are chosen do not"
" use the seed\n");
BIO_printf(bio_err, " -genkey generate ec"
" key\n");
BIO_printf(bio_err, " -rand file files to use for"
" random number input\n");
BIO_printf(bio_err, " -engine e use engine e, "
"possibly a hardware device\n");
goto end;
}
ERR_load_crypto_strings();
in = BIO_new(BIO_s_file());
out = BIO_new(BIO_s_file());
if ((in == NULL) || (out == NULL)) {
ERR_print_errors(bio_err);
goto end;
}
if (infile == NULL)
BIO_set_fp(in, stdin, BIO_NOCLOSE);
else {
if (BIO_read_filename(in, infile) <= 0) {
perror(infile);
goto end;
}
}
if (outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
} else {
if (BIO_write_filename(out, outfile) <= 0) {
perror(outfile);
goto end;
}
}
#ifndef OPENSSL_NO_ENGINE
setup_engine(bio_err, engine, 0);
#endif
if (list_curves) {
EC_builtin_curve *curves = NULL;
size_t crv_len = 0;
size_t n = 0;
crv_len = EC_get_builtin_curves(NULL, 0);
curves = reallocarray(NULL, crv_len, sizeof(EC_builtin_curve));
if (curves == NULL)
goto end;
if (!EC_get_builtin_curves(curves, crv_len)) {
free(curves);
goto end;
}
for (n = 0; n < crv_len; n++) {
const char *comment;
const char *sname;
comment = curves[n].comment;
sname = OBJ_nid2sn(curves[n].nid);
if (comment == NULL)
comment = "CURVE DESCRIPTION NOT AVAILABLE";
if (sname == NULL)
sname = "";
BIO_printf(out, " %-10s: ", sname);
BIO_printf(out, "%s\n", comment);
}
free(curves);
ret = 0;
goto end;
}
if (curve_name != NULL) {
int nid;
/*
* workaround for the SECG curve names secp192r1 and
* secp256r1 (which are the same as the curves prime192v1 and
* prime256v1 defined in X9.62)
*/
if (!strcmp(curve_name, "secp192r1")) {
BIO_printf(bio_err, "using curve name prime192v1 "
"instead of secp192r1\n");
nid = NID_X9_62_prime192v1;
} else if (!strcmp(curve_name, "secp256r1")) {
BIO_printf(bio_err, "using curve name prime256v1 "
"instead of secp256r1\n");
nid = NID_X9_62_prime256v1;
} else
nid = OBJ_sn2nid(curve_name);
if (nid == 0) {
BIO_printf(bio_err, "unknown curve name (%s)\n",
curve_name);
goto end;
}
group = EC_GROUP_new_by_curve_name(nid);
if (group == NULL) {
BIO_printf(bio_err, "unable to create curve (%s)\n",
curve_name);
goto end;
}
EC_GROUP_set_asn1_flag(group, asn1_flag);
EC_GROUP_set_point_conversion_form(group, form);
} else if (informat == FORMAT_ASN1) {
group = d2i_ECPKParameters_bio(in, NULL);
} else if (informat == FORMAT_PEM) {
group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
} else {
BIO_printf(bio_err, "bad input format specified\n");
goto end;
}
if (group == NULL) {
BIO_printf(bio_err,
"unable to load elliptic curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
if (new_form)
EC_GROUP_set_point_conversion_form(group, form);
if (new_asn1_flag)
EC_GROUP_set_asn1_flag(group, asn1_flag);
if (no_seed) {
EC_GROUP_set_seed(group, NULL, 0);
}
if (text) {
if (!ECPKParameters_print(out, group, 0))
goto end;
}
if (check) {
if (group == NULL)
BIO_printf(bio_err, "no elliptic curve parameters\n");
BIO_printf(bio_err, "checking elliptic curve parameters: ");
if (!EC_GROUP_check(group, NULL)) {
BIO_printf(bio_err, "failed\n");
ERR_print_errors(bio_err);
} else
BIO_printf(bio_err, "ok\n");
}
if (C) {
size_t buf_len = 0, tmp_len = 0;
const EC_POINT *point;
int is_prime, len = 0;
const EC_METHOD *meth = EC_GROUP_method_of(group);
if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
(ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
(ec_order = BN_new()) == NULL ||
(ec_cofactor = BN_new()) == NULL) {
perror("malloc");
goto end;
}
is_prime = (EC_METHOD_get_field_type(meth) ==
NID_X9_62_prime_field);
if (is_prime) {
if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
ec_b, NULL))
goto end;
} else {
/* TODO */
goto end;
}
if ((point = EC_GROUP_get0_generator(group)) == NULL)
goto end;
if (!EC_POINT_point2bn(group, point,
EC_GROUP_get_point_conversion_form(group), ec_gen,
NULL))
goto end;
if (!EC_GROUP_get_order(group, ec_order, NULL))
goto end;
if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
goto end;
if (!ec_p || !ec_a || !ec_b || !ec_gen ||
!ec_order || !ec_cofactor)
goto end;
len = BN_num_bits(ec_order);
if ((tmp_len = (size_t) BN_num_bytes(ec_p)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t) BN_num_bytes(ec_a)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t) BN_num_bytes(ec_b)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t) BN_num_bytes(ec_gen)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t) BN_num_bytes(ec_order)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t) BN_num_bytes(ec_cofactor)) > buf_len)
buf_len = tmp_len;
buffer = (unsigned char *) malloc(buf_len);
if (buffer == NULL) {
perror("malloc");
goto end;
}
ecparam_print_var(out, ec_p, "ec_p", len, buffer);
ecparam_print_var(out, ec_a, "ec_a", len, buffer);
ecparam_print_var(out, ec_b, "ec_b", len, buffer);
ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
ecparam_print_var(out, ec_order, "ec_order", len, buffer);
ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
buffer);
BIO_printf(out, "\n\n");
BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
BIO_printf(out, "\tint ok=0;\n");
BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
BIO_printf(out, "\tEC_POINT *point = NULL;\n");
BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
"*tmp_3 = NULL;\n\n");
BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
"sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
"goto err;\n", len, len);
BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
"sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
"goto err;\n", len, len);
BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
"sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
"goto err;\n", len, len);
if (is_prime) {
BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
"GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
"\n\t\tgoto err;\n\n");
} else {
/* TODO */
goto end;
}
BIO_printf(out, "\t/* build generator */\n");
BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
"sizeof(ec_gen_%d), tmp_1)) == NULL)"
"\n\t\tgoto err;\n", len, len);
BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
"NULL, NULL);\n");
BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
"sizeof(ec_order_%d), tmp_2)) == NULL)"
"\n\t\tgoto err;\n", len, len);
BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
"sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
"\n\t\tgoto err;\n", len, len);
BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
" tmp_2, tmp_3))\n\t\tgoto err;\n");
BIO_printf(out, "\n\tok=1;\n");
BIO_printf(out, "err:\n");
BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
BIO_printf(out, "\tif (!ok)\n");
BIO_printf(out, "\t\t{\n");
BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
BIO_printf(out, "\t\tgroup = NULL;\n");
BIO_printf(out, "\t\t}\n");
BIO_printf(out, "\treturn(group);\n\t}\n");
}
if (!noout) {
if (outformat == FORMAT_ASN1)
i = i2d_ECPKParameters_bio(out, group);
else if (outformat == FORMAT_PEM)
i = PEM_write_bio_ECPKParameters(out, group);
else {
BIO_printf(bio_err, "bad output format specified for"
" outfile\n");
goto end;
}
if (!i) {
BIO_printf(bio_err, "unable to write elliptic "
"curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (genkey) {
EC_KEY *eckey = EC_KEY_new();
if (eckey == NULL)
goto end;
if (EC_KEY_set_group(eckey, group) == 0)
goto end;
if (!EC_KEY_generate_key(eckey)) {
EC_KEY_free(eckey);
goto end;
}
if (outformat == FORMAT_ASN1)
i = i2d_ECPrivateKey_bio(out, eckey);
else if (outformat == FORMAT_PEM)
i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
NULL, 0, NULL, NULL);
else {
BIO_printf(bio_err, "bad output format specified "
"for outfile\n");
EC_KEY_free(eckey);
goto end;
}
EC_KEY_free(eckey);
}
ret = 0;
end:
if (ec_p)
BN_free(ec_p);
if (ec_a)
BN_free(ec_a);
if (ec_b)
BN_free(ec_b);
if (ec_gen)
BN_free(ec_gen);
if (ec_order)
BN_free(ec_order);
if (ec_cofactor)
BN_free(ec_cofactor);
free(buffer);
if (in != NULL)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (group != NULL)
EC_GROUP_free(group);
return (ret);
}
EC_GROUP* openssl_get_ec_group(lua_State* L, int ec_name_idx, int param_enc_idx,
int conv_form_idx)
{
int nid = NID_undef;
EC_GROUP* g = NULL;
if (lua_isnumber(L, ec_name_idx))
nid = lua_tointeger(L, ec_name_idx);
else if (lua_isstring(L, ec_name_idx))
{
const char* name = luaL_checkstring(L, ec_name_idx);
nid = OBJ_sn2nid(name);
} else if (lua_isuserdata(L, ec_name_idx))
{
if (auxiliar_isclass(L, "openssl.evp_pkey", ec_name_idx))
{
EVP_PKEY* pkey = CHECK_OBJECT(1, EVP_PKEY, "openssl.evp_pkey");
EC_KEY* ec_key = EVP_PKEY_get1_EC_KEY(pkey);
if (ec_key)
{
g = (EC_GROUP*)EC_KEY_get0_group(ec_key);
EC_KEY_free(ec_key);
}
} else if (auxiliar_isclass(L, "openssl.ec_key", ec_name_idx))
{
EC_KEY* ec_key = CHECK_OBJECT(1, EC_KEY, "openssl.ec_key");
g = (EC_GROUP*)EC_KEY_get0_group(ec_key);
}
if (g)
g = EC_GROUP_dup(g);
}
if (g == NULL && nid != NID_undef)
g = EC_GROUP_new_by_curve_name(nid);
if (g)
{
if (param_enc_idx)
{
int form = 0;
if (lua_isstring(L, param_enc_idx))
{
const char* options[] = {"compressed", "uncompressed", "hybrid", NULL};
int f = luaL_checkoption(L, param_enc_idx, NULL, options);
if (f == 0)
form = POINT_CONVERSION_COMPRESSED;
else if (f == 1)
form = POINT_CONVERSION_UNCOMPRESSED;
else if (f == 2)
form = POINT_CONVERSION_HYBRID;
else
luaL_argerror(L, param_enc_idx, "not accept value point_conversion_form");
EC_GROUP_set_point_conversion_form(g, form);
} else if (lua_isnumber(L, param_enc_idx))
{
form = luaL_checkint(L, param_enc_idx);
EC_GROUP_set_point_conversion_form(g, form);
} else if (lua_isnoneornil(L, param_enc_idx))
{
EC_GROUP_set_point_conversion_form(g, POINT_CONVERSION_UNCOMPRESSED);
}
else
luaL_argerror(L, param_enc_idx, "not accept type of point_conversion_form");
}else
EC_GROUP_set_point_conversion_form(g, POINT_CONVERSION_UNCOMPRESSED);
if (conv_form_idx)
{
int asn1_flag = 0;
if (lua_isstring(L, conv_form_idx))
{ /* OPENSSL_EC_NAMED_CURVE, 0 */
const char* const options[] = {"named_curve", "explicit", NULL};
asn1_flag = luaL_checkoption(L, conv_form_idx, NULL, options);
EC_GROUP_set_asn1_flag(g, asn1_flag);
} else if (lua_isnumber(L, conv_form_idx))
{
asn1_flag = luaL_checkint(L, conv_form_idx);
EC_GROUP_set_asn1_flag(g, asn1_flag);
} else if (lua_isnoneornil(L, conv_form_idx))
{
EC_GROUP_set_asn1_flag(g, OPENSSL_EC_NAMED_CURVE);
}
else
luaL_argerror(L, conv_form_idx, "not accept type of asn1 flag");
}else
EC_GROUP_set_asn1_flag(g, OPENSSL_EC_NAMED_CURVE);
}
return g;
}
int ecparam_main(int argc, char **argv)
{
BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
BIO *in = NULL, *out = NULL;
EC_GROUP *group = NULL;
point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
char *curve_name = NULL, *inrand = NULL;
char *infile = NULL, *outfile = NULL, *prog;
unsigned char *buffer = NULL;
OPTION_CHOICE o;
int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0, ret =
1;
int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
int text = 0, i, need_rand = 0, genkey = 0;
prog = opt_init(argc, argv, ecparam_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(ecparam_options);
ret = 0;
goto end;
case OPT_INFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
goto opthelp;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUTFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
goto opthelp;
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_TEXT:
text = 1;
break;
case OPT_C:
C = 1;
break;
case OPT_CHECK:
check = 1;
break;
case OPT_LIST_CURVES:
list_curves = 1;
break;
case OPT_NO_SEED:
no_seed = 1;
break;
case OPT_NOOUT:
noout = 1;
break;
case OPT_NAME:
curve_name = opt_arg();
break;
case OPT_CONV_FORM:
if (!opt_pair(opt_arg(), forms, &new_form))
goto opthelp;
form = new_form;
new_form = 1;
break;
case OPT_PARAM_ENC:
if (!opt_pair(opt_arg(), encodings, &asn1_flag))
goto opthelp;
new_asn1_flag = 1;
break;
case OPT_GENKEY:
genkey = need_rand = 1;
break;
case OPT_RAND:
inrand = opt_arg();
need_rand = 1;
break;
case OPT_ENGINE:
(void)setup_engine(opt_arg(), 0);
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
in = bio_open_default(infile, RB(informat));
if (in == NULL)
goto end;
out = bio_open_default(outfile, WB(outformat));
if (out == NULL)
goto end;
if (list_curves) {
EC_builtin_curve *curves = NULL;
size_t crv_len = EC_get_builtin_curves(NULL, 0);
size_t n;
curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
if (!EC_get_builtin_curves(curves, crv_len)) {
OPENSSL_free(curves);
goto end;
}
for (n = 0; n < crv_len; n++) {
const char *comment;
const char *sname;
comment = curves[n].comment;
sname = OBJ_nid2sn(curves[n].nid);
if (comment == NULL)
comment = "CURVE DESCRIPTION NOT AVAILABLE";
if (sname == NULL)
sname = "";
BIO_printf(out, " %-10s: ", sname);
BIO_printf(out, "%s\n", comment);
}
OPENSSL_free(curves);
ret = 0;
goto end;
}
if (curve_name != NULL) {
int nid;
/*
* workaround for the SECG curve names secp192r1 and secp256r1 (which
* are the same as the curves prime192v1 and prime256v1 defined in
* X9.62)
*/
if (strcmp(curve_name, "secp192r1") == 0) {
BIO_printf(bio_err, "using curve name prime192v1 "
"instead of secp192r1\n");
nid = NID_X9_62_prime192v1;
} else if (strcmp(curve_name, "secp256r1") == 0) {
BIO_printf(bio_err, "using curve name prime256v1 "
"instead of secp256r1\n");
nid = NID_X9_62_prime256v1;
} else
nid = OBJ_sn2nid(curve_name);
if (nid == 0)
nid = EC_curve_nist2nid(curve_name);
if (nid == 0) {
BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
goto end;
}
group = EC_GROUP_new_by_curve_name(nid);
if (group == NULL) {
BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
goto end;
}
EC_GROUP_set_asn1_flag(group, asn1_flag);
EC_GROUP_set_point_conversion_form(group, form);
} else if (informat == FORMAT_ASN1)
group = d2i_ECPKParameters_bio(in, NULL);
else
group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
if (group == NULL) {
BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
if (new_form)
EC_GROUP_set_point_conversion_form(group, form);
if (new_asn1_flag)
EC_GROUP_set_asn1_flag(group, asn1_flag);
if (no_seed) {
EC_GROUP_set_seed(group, NULL, 0);
}
if (text) {
if (!ECPKParameters_print(out, group, 0))
goto end;
}
if (check) {
if (group == NULL)
BIO_printf(bio_err, "no elliptic curve parameters\n");
BIO_printf(bio_err, "checking elliptic curve parameters: ");
if (!EC_GROUP_check(group, NULL)) {
BIO_printf(bio_err, "failed\n");
ERR_print_errors(bio_err);
} else
BIO_printf(bio_err, "ok\n");
}
if (C) {
size_t buf_len = 0, tmp_len = 0;
const EC_POINT *point;
int is_prime, len = 0;
const EC_METHOD *meth = EC_GROUP_method_of(group);
if ((ec_p = BN_new()) == NULL
|| (ec_a = BN_new()) == NULL
|| (ec_b = BN_new()) == NULL
|| (ec_gen = BN_new()) == NULL
|| (ec_order = BN_new()) == NULL
|| (ec_cofactor = BN_new()) == NULL) {
perror("Can't allocate BN");
goto end;
}
is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
if (!is_prime) {
BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
goto end;
}
if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
goto end;
if ((point = EC_GROUP_get0_generator(group)) == NULL)
goto end;
if (!EC_POINT_point2bn(group, point,
EC_GROUP_get_point_conversion_form(group),
ec_gen, NULL))
goto end;
if (!EC_GROUP_get_order(group, ec_order, NULL))
goto end;
if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
goto end;
if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
goto end;
len = BN_num_bits(ec_order);
if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
buf_len = tmp_len;
if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
buf_len = tmp_len;
buffer = app_malloc(buf_len, "BN buffer");
BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
print_bignum_var(out, ec_p, "ec_p", len, buffer);
print_bignum_var(out, ec_a, "ec_a", len, buffer);
print_bignum_var(out, ec_b, "ec_b", len, buffer);
print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
print_bignum_var(out, ec_order, "ec_order", len, buffer);
print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
BIO_printf(out, " int ok = 0;\n"
" EC_GROUP *group = NULL;\n"
" EC_POINT *point = NULL;\n"
" BIGNUM *tmp_1 = NULL;\n"
" BIGNUM *tmp_2 = NULL;\n"
" BIGNUM *tmp_3 = NULL;\n"
"\n");
BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof (ec_p_%d), NULL)) == NULL)\n"
" goto err;\n", len, len);
BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof (ec_a_%d), NULL)) == NULL)\n"
" goto err;\n", len, len);
BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof (ec_b_%d), NULL)) == NULL)\n"
" goto err;\n", len, len);
BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
" goto err;\n"
"\n");
BIO_printf(out, " /* build generator */\n");
BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof (ec_gen_%d), tmp_1)) == NULL)\n"
" goto err;\n", len, len);
BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
BIO_printf(out, " if (point == NULL)\n"
" goto err;\n");
BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof (ec_order_%d), tmp_2)) == NULL)\n"
" goto err;\n", len, len);
BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof (ec_cofactor_%d), tmp_3)) == NULL)\n"
" goto err;\n", len, len);
BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
" goto err;\n"
"ok = 1;"
"\n");
BIO_printf(out, "err:\n"
" BN_free(tmp_1);\n"
" BN_free(tmp_2);\n"
" BN_free(tmp_3);\n"
" EC_POINT_free(point);\n"
" if (!ok) {\n"
" EC_GROUP_free(group);\n"
" return NULL;\n"
" }\n"
" return (group);\n"
"}\n");
}
if (!noout) {
if (outformat == FORMAT_ASN1)
i = i2d_ECPKParameters_bio(out, group);
else
i = PEM_write_bio_ECPKParameters(out, group);
if (!i) {
BIO_printf(bio_err, "unable to write elliptic "
"curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (need_rand) {
app_RAND_load_file(NULL, (inrand != NULL));
if (inrand != NULL)
BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
app_RAND_load_files(inrand));
}
if (genkey) {
EC_KEY *eckey = EC_KEY_new();
if (eckey == NULL)
goto end;
assert(need_rand);
if (EC_KEY_set_group(eckey, group) == 0)
goto end;
if (!EC_KEY_generate_key(eckey)) {
EC_KEY_free(eckey);
goto end;
}
if (outformat == FORMAT_ASN1)
i = i2d_ECPrivateKey_bio(out, eckey);
else
i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
NULL, 0, NULL, NULL);
EC_KEY_free(eckey);
}
if (need_rand)
app_RAND_write_file(NULL);
ret = 0;
end:
BN_free(ec_p);
BN_free(ec_a);
BN_free(ec_b);
BN_free(ec_gen);
BN_free(ec_order);
BN_free(ec_cofactor);
OPENSSL_free(buffer);
BIO_free(in);
BIO_free_all(out);
EC_GROUP_free(group);
return (ret);
}
