| /* |
| * Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* |
| * Low level APIs related to EC_KEY are deprecated for public use, |
| * but still ok for internal use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <openssl/core_names.h> |
| #include <openssl/objects.h> |
| #include <openssl/params.h> |
| #include <openssl/err.h> |
| #ifndef FIPS_MODULE |
| # include <openssl/engine.h> |
| # include <openssl/x509.h> |
| #endif |
| #include "crypto/bn.h" |
| #include "crypto/ec.h" |
| #include "ec_local.h" |
| #include "internal/e_os.h" |
| #include "internal/param_build_set.h" |
| |
| /* Mapping between a flag and a name */ |
| static const OSSL_ITEM encoding_nameid_map[] = { |
| { OPENSSL_EC_EXPLICIT_CURVE, OSSL_PKEY_EC_ENCODING_EXPLICIT }, |
| { OPENSSL_EC_NAMED_CURVE, OSSL_PKEY_EC_ENCODING_GROUP }, |
| }; |
| |
| static const OSSL_ITEM check_group_type_nameid_map[] = { |
| { 0, OSSL_PKEY_EC_GROUP_CHECK_DEFAULT }, |
| { EC_FLAG_CHECK_NAMED_GROUP, OSSL_PKEY_EC_GROUP_CHECK_NAMED }, |
| { EC_FLAG_CHECK_NAMED_GROUP_NIST, OSSL_PKEY_EC_GROUP_CHECK_NAMED_NIST }, |
| }; |
| |
| static const OSSL_ITEM format_nameid_map[] = { |
| { (int)POINT_CONVERSION_UNCOMPRESSED, OSSL_PKEY_EC_POINT_CONVERSION_FORMAT_UNCOMPRESSED }, |
| { (int)POINT_CONVERSION_COMPRESSED, OSSL_PKEY_EC_POINT_CONVERSION_FORMAT_COMPRESSED }, |
| { (int)POINT_CONVERSION_HYBRID, OSSL_PKEY_EC_POINT_CONVERSION_FORMAT_HYBRID }, |
| }; |
| |
| int ossl_ec_encoding_name2id(const char *name) |
| { |
| size_t i, sz; |
| |
| /* Return the default value if there is no name */ |
| if (name == NULL) |
| return OPENSSL_EC_NAMED_CURVE; |
| |
| for (i = 0, sz = OSSL_NELEM(encoding_nameid_map); i < sz; i++) { |
| if (OPENSSL_strcasecmp(name, encoding_nameid_map[i].ptr) == 0) |
| return encoding_nameid_map[i].id; |
| } |
| return -1; |
| } |
| |
| static char *ec_param_encoding_id2name(int id) |
| { |
| size_t i, sz; |
| |
| for (i = 0, sz = OSSL_NELEM(encoding_nameid_map); i < sz; i++) { |
| if (id == (int)encoding_nameid_map[i].id) |
| return encoding_nameid_map[i].ptr; |
| } |
| return NULL; |
| } |
| |
| char *ossl_ec_check_group_type_id2name(int id) |
| { |
| size_t i, sz; |
| |
| for (i = 0, sz = OSSL_NELEM(check_group_type_nameid_map); i < sz; i++) { |
| if (id == (int)check_group_type_nameid_map[i].id) |
| return check_group_type_nameid_map[i].ptr; |
| } |
| return NULL; |
| } |
| |
| static int ec_check_group_type_name2id(const char *name) |
| { |
| size_t i, sz; |
| |
| /* Return the default value if there is no name */ |
| if (name == NULL) |
| return 0; |
| |
| for (i = 0, sz = OSSL_NELEM(check_group_type_nameid_map); i < sz; i++) { |
| if (OPENSSL_strcasecmp(name, check_group_type_nameid_map[i].ptr) == 0) |
| return check_group_type_nameid_map[i].id; |
| } |
| return -1; |
| } |
| |
| int ossl_ec_set_check_group_type_from_name(EC_KEY *ec, const char *name) |
| { |
| int flags = ec_check_group_type_name2id(name); |
| |
| if (flags == -1) |
| return 0; |
| EC_KEY_clear_flags(ec, EC_FLAG_CHECK_NAMED_GROUP_MASK); |
| EC_KEY_set_flags(ec, flags); |
| return 1; |
| } |
| |
| static int ec_set_check_group_type_from_param(EC_KEY *ec, const OSSL_PARAM *p) |
| { |
| const char *name = NULL; |
| int status = 0; |
| |
| switch (p->data_type) { |
| case OSSL_PARAM_UTF8_STRING: |
| name = p->data; |
| status = (name != NULL); |
| break; |
| case OSSL_PARAM_UTF8_PTR: |
| status = OSSL_PARAM_get_utf8_ptr(p, &name); |
| break; |
| } |
| if (status) |
| return ossl_ec_set_check_group_type_from_name(ec, name); |
| return 0; |
| } |
| |
| int ossl_ec_pt_format_name2id(const char *name) |
| { |
| size_t i, sz; |
| |
| /* Return the default value if there is no name */ |
| if (name == NULL) |
| return (int)POINT_CONVERSION_UNCOMPRESSED; |
| |
| for (i = 0, sz = OSSL_NELEM(format_nameid_map); i < sz; i++) { |
| if (OPENSSL_strcasecmp(name, format_nameid_map[i].ptr) == 0) |
| return format_nameid_map[i].id; |
| } |
| return -1; |
| } |
| |
| char *ossl_ec_pt_format_id2name(int id) |
| { |
| size_t i, sz; |
| |
| for (i = 0, sz = OSSL_NELEM(format_nameid_map); i < sz; i++) { |
| if (id == (int)format_nameid_map[i].id) |
| return format_nameid_map[i].ptr; |
| } |
| return NULL; |
| } |
| |
| static int ec_group_explicit_todata(const EC_GROUP *group, OSSL_PARAM_BLD *tmpl, |
| OSSL_PARAM params[], BN_CTX *bnctx, |
| unsigned char **genbuf) |
| { |
| int ret = 0, fid; |
| const char *field_type; |
| const OSSL_PARAM *param = NULL; |
| const OSSL_PARAM *param_p = NULL; |
| const OSSL_PARAM *param_a = NULL; |
| const OSSL_PARAM *param_b = NULL; |
| |
| fid = EC_GROUP_get_field_type(group); |
| |
| if (fid == NID_X9_62_prime_field) { |
| field_type = SN_X9_62_prime_field; |
| } else if (fid == NID_X9_62_characteristic_two_field) { |
| #ifdef OPENSSL_NO_EC2M |
| ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
| goto err; |
| #else |
| field_type = SN_X9_62_characteristic_two_field; |
| #endif |
| } else { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_FIELD); |
| return 0; |
| } |
| |
| param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_P); |
| param_a = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_A); |
| param_b = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_B); |
| if (tmpl != NULL || param_p != NULL || param_a != NULL || param_b != NULL) |
| { |
| BIGNUM *p = BN_CTX_get(bnctx); |
| BIGNUM *a = BN_CTX_get(bnctx); |
| BIGNUM *b = BN_CTX_get(bnctx); |
| |
| if (b == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| if (!EC_GROUP_get_curve(group, p, a, b, bnctx)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_CURVE); |
| goto err; |
| } |
| if (!ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_P, p) |
| || !ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_A, a) |
| || !ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_B, b)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_ORDER); |
| if (tmpl != NULL || param != NULL) { |
| const BIGNUM *order = EC_GROUP_get0_order(group); |
| |
| if (order == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_GROUP_ORDER); |
| goto err; |
| } |
| if (!ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_ORDER, |
| order)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_FIELD_TYPE); |
| if (tmpl != NULL || param != NULL) { |
| if (!ossl_param_build_set_utf8_string(tmpl, params, |
| OSSL_PKEY_PARAM_EC_FIELD_TYPE, |
| field_type)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_GENERATOR); |
| if (tmpl != NULL || param != NULL) { |
| size_t genbuf_len; |
| const EC_POINT *genpt = EC_GROUP_get0_generator(group); |
| point_conversion_form_t genform = EC_GROUP_get_point_conversion_form(group); |
| |
| if (genpt == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_GENERATOR); |
| goto err; |
| } |
| genbuf_len = EC_POINT_point2buf(group, genpt, genform, genbuf, bnctx); |
| if (genbuf_len == 0) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_GENERATOR); |
| goto err; |
| } |
| if (!ossl_param_build_set_octet_string(tmpl, params, |
| OSSL_PKEY_PARAM_EC_GENERATOR, |
| *genbuf, genbuf_len)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_COFACTOR); |
| if (tmpl != NULL || param != NULL) { |
| const BIGNUM *cofactor = EC_GROUP_get0_cofactor(group); |
| |
| if (cofactor != NULL |
| && !ossl_param_build_set_bn(tmpl, params, |
| OSSL_PKEY_PARAM_EC_COFACTOR, cofactor)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_SEED); |
| if (tmpl != NULL || param != NULL) { |
| unsigned char *seed = EC_GROUP_get0_seed(group); |
| size_t seed_len = EC_GROUP_get_seed_len(group); |
| |
| if (seed != NULL |
| && seed_len > 0 |
| && !ossl_param_build_set_octet_string(tmpl, params, |
| OSSL_PKEY_PARAM_EC_SEED, |
| seed, seed_len)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| ret = 1; |
| err: |
| return ret; |
| } |
| |
| int ossl_ec_group_todata(const EC_GROUP *group, OSSL_PARAM_BLD *tmpl, |
| OSSL_PARAM params[], OSSL_LIB_CTX *libctx, |
| const char *propq, |
| BN_CTX *bnctx, unsigned char **genbuf) |
| { |
| int ret = 0, curve_nid, encoding_flag; |
| const char *encoding_name, *pt_form_name; |
| point_conversion_form_t genform; |
| |
| if (group == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| genform = EC_GROUP_get_point_conversion_form(group); |
| pt_form_name = ossl_ec_pt_format_id2name(genform); |
| if (pt_form_name == NULL |
| || !ossl_param_build_set_utf8_string( |
| tmpl, params, |
| OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, pt_form_name)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_FORM); |
| return 0; |
| } |
| encoding_flag = EC_GROUP_get_asn1_flag(group) & OPENSSL_EC_NAMED_CURVE; |
| encoding_name = ec_param_encoding_id2name(encoding_flag); |
| if (encoding_name == NULL |
| || !ossl_param_build_set_utf8_string(tmpl, params, |
| OSSL_PKEY_PARAM_EC_ENCODING, |
| encoding_name)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_ENCODING); |
| return 0; |
| } |
| |
| curve_nid = EC_GROUP_get_curve_name(group); |
| |
| /* |
| * Get the explicit parameters in these two cases: |
| * - We do not have a template, i.e. specific parameters are requested |
| * - The curve is not a named curve |
| */ |
| if (tmpl == NULL || curve_nid == NID_undef) |
| if (!ec_group_explicit_todata(group, tmpl, params, bnctx, genbuf)) |
| goto err; |
| |
| if (curve_nid != NID_undef) { |
| /* Named curve */ |
| const char *curve_name = OSSL_EC_curve_nid2name(curve_nid); |
| |
| if (curve_name == NULL |
| || !ossl_param_build_set_utf8_string(tmpl, params, |
| OSSL_PKEY_PARAM_GROUP_NAME, |
| curve_name)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_CURVE); |
| goto err; |
| } |
| } |
| ret = 1; |
| err: |
| return ret; |
| } |
| |
| /* |
| * The intention with the "backend" source file is to offer backend support |
| * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider |
| * implementations alike. |
| */ |
| int ossl_ec_set_ecdh_cofactor_mode(EC_KEY *ec, int mode) |
| { |
| const EC_GROUP *ecg = EC_KEY_get0_group(ec); |
| const BIGNUM *cofactor; |
| /* |
| * mode can be only 0 for disable, or 1 for enable here. |
| * |
| * This is in contrast with the same parameter on an ECDH EVP_PKEY_CTX that |
| * also supports mode == -1 with the meaning of "reset to the default for |
| * the associated key". |
| */ |
| if (mode < 0 || mode > 1) |
| return 0; |
| |
| if ((cofactor = EC_GROUP_get0_cofactor(ecg)) == NULL ) |
| return 0; |
| |
| /* ECDH cofactor mode has no effect if cofactor is 1 */ |
| if (BN_is_one(cofactor)) |
| return 1; |
| |
| if (mode == 1) |
| EC_KEY_set_flags(ec, EC_FLAG_COFACTOR_ECDH); |
| else if (mode == 0) |
| EC_KEY_clear_flags(ec, EC_FLAG_COFACTOR_ECDH); |
| |
| return 1; |
| } |
| |
| /* |
| * Callers of ossl_ec_key_fromdata MUST make sure that ec_key_params_fromdata has |
| * been called before! |
| * |
| * This function only gets the bare keypair, domain parameters and other |
| * parameters are treated separately, and domain parameters are required to |
| * define a keypair. |
| */ |
| int ossl_ec_key_fromdata(EC_KEY *ec, const OSSL_PARAM params[], int include_private) |
| { |
| const OSSL_PARAM *param_priv_key = NULL, *param_pub_key = NULL; |
| BN_CTX *ctx = NULL; |
| BIGNUM *priv_key = NULL; |
| unsigned char *pub_key = NULL; |
| size_t pub_key_len; |
| const EC_GROUP *ecg = NULL; |
| EC_POINT *pub_point = NULL; |
| int ok = 0; |
| |
| ecg = EC_KEY_get0_group(ec); |
| if (ecg == NULL) |
| return 0; |
| |
| param_pub_key = |
| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY); |
| if (include_private) |
| param_priv_key = |
| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY); |
| |
| ctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(ec)); |
| if (ctx == NULL) |
| goto err; |
| |
| if (param_pub_key != NULL) |
| if (!OSSL_PARAM_get_octet_string(param_pub_key, |
| (void **)&pub_key, 0, &pub_key_len) |
| || (pub_point = EC_POINT_new(ecg)) == NULL |
| || !EC_POINT_oct2point(ecg, pub_point, pub_key, pub_key_len, ctx)) |
| goto err; |
| |
| if (param_priv_key != NULL && include_private) { |
| int fixed_words; |
| const BIGNUM *order; |
| |
| /* |
| * Key import/export should never leak the bit length of the secret |
| * scalar in the key. |
| * |
| * For this reason, on export we use padded BIGNUMs with fixed length. |
| * |
| * When importing we also should make sure that, even if short lived, |
| * the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as |
| * soon as possible, so that any processing of this BIGNUM might opt for |
| * constant time implementations in the backend. |
| * |
| * Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have |
| * to preallocate the BIGNUM internal buffer to a fixed public size big |
| * enough that operations performed during the processing never trigger |
| * a realloc which would leak the size of the scalar through memory |
| * accesses. |
| * |
| * Fixed Length |
| * ------------ |
| * |
| * The order of the large prime subgroup of the curve is our choice for |
| * a fixed public size, as that is generally the upper bound for |
| * generating a private key in EC cryptosystems and should fit all valid |
| * secret scalars. |
| * |
| * For padding on export we just use the bit length of the order |
| * converted to bytes (rounding up). |
| * |
| * For preallocating the BIGNUM storage we look at the number of "words" |
| * required for the internal representation of the order, and we |
| * preallocate 2 extra "words" in case any of the subsequent processing |
| * might temporarily overflow the order length. |
| */ |
| order = EC_GROUP_get0_order(ecg); |
| if (order == NULL || BN_is_zero(order)) |
| goto err; |
| |
| fixed_words = bn_get_top(order) + 2; |
| |
| if ((priv_key = BN_secure_new()) == NULL) |
| goto err; |
| if (bn_wexpand(priv_key, fixed_words) == NULL) |
| goto err; |
| BN_set_flags(priv_key, BN_FLG_CONSTTIME); |
| |
| if (!OSSL_PARAM_get_BN(param_priv_key, &priv_key)) |
| goto err; |
| } |
| |
| if (priv_key != NULL |
| && !EC_KEY_set_private_key(ec, priv_key)) |
| goto err; |
| |
| if (pub_point != NULL |
| && !EC_KEY_set_public_key(ec, pub_point)) |
| goto err; |
| |
| ok = 1; |
| |
| err: |
| BN_CTX_free(ctx); |
| BN_clear_free(priv_key); |
| OPENSSL_free(pub_key); |
| EC_POINT_free(pub_point); |
| return ok; |
| } |
| |
| int ossl_ec_group_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) |
| { |
| int ok = 0; |
| EC_GROUP *group = NULL; |
| |
| if (ec == NULL) |
| return 0; |
| |
| group = EC_GROUP_new_from_params(params, ossl_ec_key_get_libctx(ec), |
| ossl_ec_key_get0_propq(ec)); |
| |
| if (!EC_KEY_set_group(ec, group)) |
| goto err; |
| ok = 1; |
| err: |
| EC_GROUP_free(group); |
| return ok; |
| } |
| |
| static int ec_key_point_format_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) |
| { |
| const OSSL_PARAM *p; |
| int format = -1; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT); |
| if (p != NULL) { |
| if (!ossl_ec_pt_format_param2id(p, &format)) { |
| ECerr(0, EC_R_INVALID_FORM); |
| return 0; |
| } |
| EC_KEY_set_conv_form(ec, format); |
| } |
| return 1; |
| } |
| |
| static int ec_key_group_check_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) |
| { |
| const OSSL_PARAM *p; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE); |
| if (p != NULL) |
| return ec_set_check_group_type_from_param(ec, p); |
| return 1; |
| } |
| |
| static int ec_set_include_public(EC_KEY *ec, int include) |
| { |
| int flags = EC_KEY_get_enc_flags(ec); |
| |
| if (!include) |
| flags |= EC_PKEY_NO_PUBKEY; |
| else |
| flags &= ~EC_PKEY_NO_PUBKEY; |
| EC_KEY_set_enc_flags(ec, flags); |
| return 1; |
| } |
| |
| int ossl_ec_key_otherparams_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) |
| { |
| const OSSL_PARAM *p; |
| |
| if (ec == NULL) |
| return 0; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH); |
| if (p != NULL) { |
| int mode; |
| |
| if (!OSSL_PARAM_get_int(p, &mode) |
| || !ossl_ec_set_ecdh_cofactor_mode(ec, mode)) |
| return 0; |
| } |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC); |
| if (p != NULL) { |
| int include = 1; |
| |
| if (!OSSL_PARAM_get_int(p, &include) |
| || !ec_set_include_public(ec, include)) |
| return 0; |
| } |
| if (!ec_key_point_format_fromdata(ec, params)) |
| return 0; |
| if (!ec_key_group_check_fromdata(ec, params)) |
| return 0; |
| return 1; |
| } |
| |
| int ossl_ec_key_is_foreign(const EC_KEY *ec) |
| { |
| #ifndef FIPS_MODULE |
| if (ec->engine != NULL || EC_KEY_get_method(ec) != EC_KEY_OpenSSL()) |
| return 1; |
| #endif |
| return 0; |
| |
| } |
| |
| EC_KEY *ossl_ec_key_dup(const EC_KEY *src, int selection) |
| { |
| EC_KEY *ret; |
| |
| if (src == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
| return NULL; |
| } |
| |
| if ((ret = ossl_ec_key_new_method_int(src->libctx, src->propq, |
| src->engine)) == NULL) |
| return NULL; |
| |
| /* copy the parameters */ |
| if (src->group != NULL |
| && (selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| ret->group = ossl_ec_group_new_ex(src->libctx, src->propq, |
| src->group->meth); |
| if (ret->group == NULL |
| || !EC_GROUP_copy(ret->group, src->group)) |
| goto err; |
| |
| if (src->meth != NULL) { |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| if (src->engine != NULL && ENGINE_init(src->engine) == 0) |
| goto err; |
| ret->engine = src->engine; |
| #endif |
| ret->meth = src->meth; |
| } |
| } |
| |
| /* copy the public key */ |
| if (src->pub_key != NULL |
| && (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) { |
| if (ret->group == NULL) |
| /* no parameter-less keys allowed */ |
| goto err; |
| ret->pub_key = EC_POINT_new(ret->group); |
| if (ret->pub_key == NULL |
| || !EC_POINT_copy(ret->pub_key, src->pub_key)) |
| goto err; |
| } |
| |
| /* copy the private key */ |
| if (src->priv_key != NULL |
| && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) { |
| if (ret->group == NULL) |
| /* no parameter-less keys allowed */ |
| goto err; |
| ret->priv_key = BN_new(); |
| if (ret->priv_key == NULL || !BN_copy(ret->priv_key, src->priv_key)) |
| goto err; |
| if (ret->group->meth->keycopy |
| && ret->group->meth->keycopy(ret, src) == 0) |
| goto err; |
| } |
| |
| /* copy the rest */ |
| if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0) { |
| ret->enc_flag = src->enc_flag; |
| ret->conv_form = src->conv_form; |
| } |
| |
| ret->version = src->version; |
| ret->flags = src->flags; |
| |
| #ifndef FIPS_MODULE |
| if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY, |
| &ret->ex_data, &src->ex_data)) |
| goto err; |
| #endif |
| |
| if (ret->meth != NULL && ret->meth->copy != NULL) { |
| if ((selection |
| & OSSL_KEYMGMT_SELECT_KEYPAIR) != OSSL_KEYMGMT_SELECT_KEYPAIR) |
| goto err; |
| if (ret->meth->copy(ret, src) == 0) |
| goto err; |
| } |
| |
| return ret; |
| err: |
| EC_KEY_free(ret); |
| return NULL; |
| } |
| |
| int ossl_ec_encoding_param2id(const OSSL_PARAM *p, int *id) |
| { |
| const char *name = NULL; |
| int status = 0; |
| |
| switch (p->data_type) { |
| case OSSL_PARAM_UTF8_STRING: |
| /* The OSSL_PARAM functions have no support for this */ |
| name = p->data; |
| status = (name != NULL); |
| break; |
| case OSSL_PARAM_UTF8_PTR: |
| status = OSSL_PARAM_get_utf8_ptr(p, &name); |
| break; |
| } |
| if (status) { |
| int i = ossl_ec_encoding_name2id(name); |
| |
| if (i >= 0) { |
| *id = i; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| int ossl_ec_pt_format_param2id(const OSSL_PARAM *p, int *id) |
| { |
| const char *name = NULL; |
| int status = 0; |
| |
| switch (p->data_type) { |
| case OSSL_PARAM_UTF8_STRING: |
| /* The OSSL_PARAM functions have no support for this */ |
| name = p->data; |
| status = (name != NULL); |
| break; |
| case OSSL_PARAM_UTF8_PTR: |
| status = OSSL_PARAM_get_utf8_ptr(p, &name); |
| break; |
| } |
| if (status) { |
| int i = ossl_ec_pt_format_name2id(name); |
| |
| if (i >= 0) { |
| *id = i; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| #ifndef FIPS_MODULE |
| int ossl_x509_algor_is_sm2(const X509_ALGOR *palg) |
| { |
| int ptype = 0; |
| const void *pval = NULL; |
| |
| X509_ALGOR_get0(NULL, &ptype, &pval, palg); |
| |
| if (ptype == V_ASN1_OBJECT) |
| return OBJ_obj2nid((ASN1_OBJECT *)pval) == NID_sm2; |
| |
| if (ptype == V_ASN1_SEQUENCE) { |
| const ASN1_STRING *str = pval; |
| const unsigned char *der = str->data; |
| int derlen = str->length; |
| EC_GROUP *group; |
| int ret; |
| |
| if ((group = d2i_ECPKParameters(NULL, &der, derlen)) == NULL) |
| ret = 0; |
| else |
| ret = (EC_GROUP_get_curve_name(group) == NID_sm2); |
| |
| EC_GROUP_free(group); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| EC_KEY *ossl_ec_key_param_from_x509_algor(const X509_ALGOR *palg, |
| OSSL_LIB_CTX *libctx, const char *propq) |
| { |
| int ptype = 0; |
| const void *pval = NULL; |
| EC_KEY *eckey = NULL; |
| EC_GROUP *group = NULL; |
| |
| X509_ALGOR_get0(NULL, &ptype, &pval, palg); |
| if ((eckey = EC_KEY_new_ex(libctx, propq)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto ecerr; |
| } |
| |
| if (ptype == V_ASN1_SEQUENCE) { |
| const ASN1_STRING *pstr = pval; |
| const unsigned char *pm = pstr->data; |
| int pmlen = pstr->length; |
| |
| |
| if (d2i_ECParameters(&eckey, &pm, pmlen) == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR); |
| goto ecerr; |
| } |
| } else if (ptype == V_ASN1_OBJECT) { |
| const ASN1_OBJECT *poid = pval; |
| |
| /* |
| * type == V_ASN1_OBJECT => the parameters are given by an asn1 OID |
| */ |
| |
| group = EC_GROUP_new_by_curve_name_ex(libctx, propq, OBJ_obj2nid(poid)); |
| if (group == NULL) |
| goto ecerr; |
| EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE); |
| if (EC_KEY_set_group(eckey, group) == 0) |
| goto ecerr; |
| EC_GROUP_free(group); |
| } else { |
| ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR); |
| goto ecerr; |
| } |
| |
| return eckey; |
| |
| ecerr: |
| EC_KEY_free(eckey); |
| EC_GROUP_free(group); |
| return NULL; |
| } |
| |
| EC_KEY *ossl_ec_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf, |
| OSSL_LIB_CTX *libctx, const char *propq) |
| { |
| const unsigned char *p = NULL; |
| int pklen; |
| EC_KEY *eckey = NULL; |
| const X509_ALGOR *palg; |
| |
| if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8inf)) |
| return 0; |
| eckey = ossl_ec_key_param_from_x509_algor(palg, libctx, propq); |
| if (eckey == NULL) |
| goto err; |
| |
| /* We have parameters now set private key */ |
| if (!d2i_ECPrivateKey(&eckey, &p, pklen)) { |
| ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR); |
| goto err; |
| } |
| |
| return eckey; |
| err: |
| EC_KEY_free(eckey); |
| return NULL; |
| } |
| #endif |
