| /* |
| * 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 |
| */ |
| |
| /* |
| * ECDH/ECDSA low level APIs are deprecated for public use, but still ok for |
| * internal use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <string.h> |
| #include <openssl/core_dispatch.h> |
| #include <openssl/core_names.h> |
| #include <openssl/bn.h> |
| #include <openssl/err.h> |
| #include <openssl/objects.h> |
| #include <openssl/proverr.h> |
| #include "crypto/bn.h" |
| #include "crypto/ec.h" |
| #include "prov/implementations.h" |
| #include "prov/providercommon.h" |
| #include "prov/provider_ctx.h" |
| #include "internal/param_build_set.h" |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| # include "crypto/sm2.h" |
| # endif |
| #endif |
| |
| static OSSL_FUNC_keymgmt_new_fn ec_newdata; |
| static OSSL_FUNC_keymgmt_gen_init_fn ec_gen_init; |
| static OSSL_FUNC_keymgmt_gen_set_template_fn ec_gen_set_template; |
| static OSSL_FUNC_keymgmt_gen_set_params_fn ec_gen_set_params; |
| static OSSL_FUNC_keymgmt_gen_settable_params_fn ec_gen_settable_params; |
| static OSSL_FUNC_keymgmt_gen_fn ec_gen; |
| static OSSL_FUNC_keymgmt_gen_cleanup_fn ec_gen_cleanup; |
| static OSSL_FUNC_keymgmt_load_fn ec_load; |
| static OSSL_FUNC_keymgmt_free_fn ec_freedata; |
| static OSSL_FUNC_keymgmt_get_params_fn ec_get_params; |
| static OSSL_FUNC_keymgmt_gettable_params_fn ec_gettable_params; |
| static OSSL_FUNC_keymgmt_set_params_fn ec_set_params; |
| static OSSL_FUNC_keymgmt_settable_params_fn ec_settable_params; |
| static OSSL_FUNC_keymgmt_has_fn ec_has; |
| static OSSL_FUNC_keymgmt_match_fn ec_match; |
| static OSSL_FUNC_keymgmt_validate_fn ec_validate; |
| static OSSL_FUNC_keymgmt_import_fn ec_import; |
| static OSSL_FUNC_keymgmt_import_types_fn ec_import_types; |
| static OSSL_FUNC_keymgmt_export_fn ec_export; |
| static OSSL_FUNC_keymgmt_export_types_fn ec_export_types; |
| static OSSL_FUNC_keymgmt_query_operation_name_fn ec_query_operation_name; |
| static OSSL_FUNC_keymgmt_dup_fn ec_dup; |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static OSSL_FUNC_keymgmt_new_fn sm2_newdata; |
| static OSSL_FUNC_keymgmt_gen_init_fn sm2_gen_init; |
| static OSSL_FUNC_keymgmt_gen_fn sm2_gen; |
| static OSSL_FUNC_keymgmt_get_params_fn sm2_get_params; |
| static OSSL_FUNC_keymgmt_gettable_params_fn sm2_gettable_params; |
| static OSSL_FUNC_keymgmt_settable_params_fn sm2_settable_params; |
| static OSSL_FUNC_keymgmt_import_fn sm2_import; |
| static OSSL_FUNC_keymgmt_query_operation_name_fn sm2_query_operation_name; |
| static OSSL_FUNC_keymgmt_validate_fn sm2_validate; |
| # endif |
| #endif |
| |
| #define EC_DEFAULT_MD "SHA256" |
| #define EC_POSSIBLE_SELECTIONS \ |
| (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) |
| #define SM2_DEFAULT_MD "SM3" |
| |
| static |
| const char *ec_query_operation_name(int operation_id) |
| { |
| switch (operation_id) { |
| case OSSL_OP_KEYEXCH: |
| return "ECDH"; |
| case OSSL_OP_SIGNATURE: |
| return "ECDSA"; |
| } |
| return NULL; |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static |
| const char *sm2_query_operation_name(int operation_id) |
| { |
| switch (operation_id) { |
| case OSSL_OP_SIGNATURE: |
| return "SM2"; |
| } |
| return NULL; |
| } |
| # endif |
| #endif |
| |
| /* |
| * Callers of key_to_params MUST make sure that domparams_to_params is also |
| * called! |
| * |
| * This function only exports the bare keypair, domain parameters and other |
| * parameters are exported separately. |
| */ |
| static ossl_inline |
| int key_to_params(const EC_KEY *eckey, OSSL_PARAM_BLD *tmpl, |
| OSSL_PARAM params[], int include_private, |
| unsigned char **pub_key) |
| { |
| BIGNUM *x = NULL, *y = NULL; |
| const BIGNUM *priv_key = NULL; |
| const EC_POINT *pub_point = NULL; |
| const EC_GROUP *ecg = NULL; |
| size_t pub_key_len = 0; |
| int ret = 0; |
| BN_CTX *bnctx = NULL; |
| |
| if (eckey == NULL |
| || (ecg = EC_KEY_get0_group(eckey)) == NULL) |
| return 0; |
| |
| priv_key = EC_KEY_get0_private_key(eckey); |
| pub_point = EC_KEY_get0_public_key(eckey); |
| |
| if (pub_point != NULL) { |
| OSSL_PARAM *p = NULL, *px = NULL, *py = NULL; |
| /* |
| * EC_POINT_point2buf() can generate random numbers in some |
| * implementations so we need to ensure we use the correct libctx. |
| */ |
| bnctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(eckey)); |
| if (bnctx == NULL) |
| goto err; |
| |
| |
| /* If we are doing a get then check first before decoding the point */ |
| if (tmpl == NULL) { |
| p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_PUB_KEY); |
| px = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_EC_PUB_X); |
| py = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_EC_PUB_Y); |
| } |
| |
| if (p != NULL || tmpl != NULL) { |
| /* convert pub_point to a octet string according to the SECG standard */ |
| if ((pub_key_len = EC_POINT_point2buf(ecg, pub_point, |
| POINT_CONVERSION_COMPRESSED, |
| pub_key, bnctx)) == 0 |
| || !ossl_param_build_set_octet_string(tmpl, p, |
| OSSL_PKEY_PARAM_PUB_KEY, |
| *pub_key, pub_key_len)) |
| goto err; |
| } |
| if (px != NULL || py != NULL) { |
| if (px != NULL) |
| x = BN_CTX_get(bnctx); |
| if (py != NULL) |
| y = BN_CTX_get(bnctx); |
| |
| if (!EC_POINT_get_affine_coordinates(ecg, pub_point, x, y, bnctx)) |
| goto err; |
| if (px != NULL |
| && !ossl_param_build_set_bn(tmpl, px, |
| OSSL_PKEY_PARAM_EC_PUB_X, x)) |
| goto err; |
| if (py != NULL |
| && !ossl_param_build_set_bn(tmpl, py, |
| OSSL_PKEY_PARAM_EC_PUB_Y, y)) |
| goto err; |
| } |
| } |
| |
| if (priv_key != NULL && include_private) { |
| size_t sz; |
| int ecbits; |
| |
| /* |
| * 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. |
| */ |
| ecbits = EC_GROUP_order_bits(ecg); |
| if (ecbits <= 0) |
| goto err; |
| sz = (ecbits + 7) / 8; |
| |
| if (!ossl_param_build_set_bn_pad(tmpl, params, |
| OSSL_PKEY_PARAM_PRIV_KEY, |
| priv_key, sz)) |
| goto err; |
| } |
| ret = 1; |
| err: |
| BN_CTX_free(bnctx); |
| return ret; |
| } |
| |
| static ossl_inline |
| int otherparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl, |
| OSSL_PARAM params[]) |
| { |
| int ecdh_cofactor_mode = 0, group_check = 0; |
| const char *name = NULL; |
| point_conversion_form_t format; |
| |
| if (ec == NULL) |
| return 0; |
| |
| format = EC_KEY_get_conv_form(ec); |
| name = ossl_ec_pt_format_id2name((int)format); |
| if (name != NULL |
| && !ossl_param_build_set_utf8_string(tmpl, params, |
| OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, |
| name)) |
| return 0; |
| |
| group_check = EC_KEY_get_flags(ec) & EC_FLAG_CHECK_NAMED_GROUP_MASK; |
| name = ossl_ec_check_group_type_id2name(group_check); |
| if (name != NULL |
| && !ossl_param_build_set_utf8_string(tmpl, params, |
| OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE, |
| name)) |
| return 0; |
| |
| if ((EC_KEY_get_enc_flags(ec) & EC_PKEY_NO_PUBKEY) != 0 |
| && !ossl_param_build_set_int(tmpl, params, |
| OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, 0)) |
| return 0; |
| |
| ecdh_cofactor_mode = |
| (EC_KEY_get_flags(ec) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0; |
| return ossl_param_build_set_int(tmpl, params, |
| OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, |
| ecdh_cofactor_mode); |
| } |
| |
| static |
| void *ec_newdata(void *provctx) |
| { |
| if (!ossl_prov_is_running()) |
| return NULL; |
| return EC_KEY_new_ex(PROV_LIBCTX_OF(provctx), NULL); |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static |
| void *sm2_newdata(void *provctx) |
| { |
| if (!ossl_prov_is_running()) |
| return NULL; |
| return EC_KEY_new_by_curve_name_ex(PROV_LIBCTX_OF(provctx), NULL, NID_sm2); |
| } |
| # endif |
| #endif |
| |
| static |
| void ec_freedata(void *keydata) |
| { |
| EC_KEY_free(keydata); |
| } |
| |
| static |
| int ec_has(const void *keydata, int selection) |
| { |
| const EC_KEY *ec = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || ec == NULL) |
| return 0; |
| if ((selection & EC_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* the selection is not missing */ |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) |
| ok = ok && (EC_KEY_get0_public_key(ec) != NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && (EC_KEY_get0_private_key(ec) != NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| ok = ok && (EC_KEY_get0_group(ec) != NULL); |
| /* |
| * We consider OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS to always be |
| * available, so no extra check is needed other than the previous one |
| * against EC_POSSIBLE_SELECTIONS. |
| */ |
| return ok; |
| } |
| |
| static int ec_match(const void *keydata1, const void *keydata2, int selection) |
| { |
| const EC_KEY *ec1 = keydata1; |
| const EC_KEY *ec2 = keydata2; |
| const EC_GROUP *group_a = EC_KEY_get0_group(ec1); |
| const EC_GROUP *group_b = EC_KEY_get0_group(ec2); |
| BN_CTX *ctx = NULL; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running()) |
| return 0; |
| |
| ctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(ec1)); |
| if (ctx == NULL) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| ok = ok && group_a != NULL && group_b != NULL |
| && EC_GROUP_cmp(group_a, group_b, ctx) == 0; |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int key_checked = 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) { |
| const EC_POINT *pa = EC_KEY_get0_public_key(ec1); |
| const EC_POINT *pb = EC_KEY_get0_public_key(ec2); |
| |
| if (pa != NULL && pb != NULL) { |
| ok = ok && EC_POINT_cmp(group_b, pa, pb, ctx) == 0; |
| key_checked = 1; |
| } |
| } |
| if (!key_checked |
| && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) { |
| const BIGNUM *pa = EC_KEY_get0_private_key(ec1); |
| const BIGNUM *pb = EC_KEY_get0_private_key(ec2); |
| |
| if (pa != NULL && pb != NULL) { |
| ok = ok && BN_cmp(pa, pb) == 0; |
| key_checked = 1; |
| } |
| } |
| ok = ok && key_checked; |
| } |
| BN_CTX_free(ctx); |
| return ok; |
| } |
| |
| static int common_check_sm2(const EC_KEY *ec, int sm2_wanted) |
| { |
| const EC_GROUP *ecg = NULL; |
| |
| /* |
| * sm2_wanted: import the keys or domparams only on SM2 Curve |
| * !sm2_wanted: import the keys or domparams only not on SM2 Curve |
| */ |
| if ((ecg = EC_KEY_get0_group(ec)) == NULL |
| || (sm2_wanted ^ (EC_GROUP_get_curve_name(ecg) == NID_sm2))) |
| return 0; |
| return 1; |
| } |
| |
| static |
| int common_import(void *keydata, int selection, const OSSL_PARAM params[], |
| int sm2_wanted) |
| { |
| EC_KEY *ec = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || ec == NULL) |
| return 0; |
| |
| /* |
| * In this implementation, we can export/import only keydata in the |
| * following combinations: |
| * - domain parameters (+optional other params) |
| * - public key with associated domain parameters (+optional other params) |
| * - private key with associated domain parameters and optional public key |
| * (+optional other params) |
| * |
| * This means: |
| * - domain parameters must always be requested |
| * - private key must be requested alongside public key |
| * - other parameters are always optional |
| */ |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) == 0) |
| return 0; |
| |
| ok = ok && ossl_ec_group_fromdata(ec, params); |
| |
| if (!common_check_sm2(ec, sm2_wanted)) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int include_private = |
| selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; |
| |
| ok = ok && ossl_ec_key_fromdata(ec, params, include_private); |
| } |
| if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0) |
| ok = ok && ossl_ec_key_otherparams_fromdata(ec, params); |
| |
| return ok; |
| } |
| |
| static |
| int ec_import(void *keydata, int selection, const OSSL_PARAM params[]) |
| { |
| return common_import(keydata, selection, params, 0); |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static |
| int sm2_import(void *keydata, int selection, const OSSL_PARAM params[]) |
| { |
| return common_import(keydata, selection, params, 1); |
| } |
| # endif |
| #endif |
| |
| static |
| int ec_export(void *keydata, int selection, OSSL_CALLBACK *param_cb, |
| void *cbarg) |
| { |
| EC_KEY *ec = keydata; |
| OSSL_PARAM_BLD *tmpl = NULL; |
| OSSL_PARAM *params = NULL; |
| unsigned char *pub_key = NULL, *genbuf = NULL; |
| BN_CTX *bnctx = NULL; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || ec == NULL) |
| return 0; |
| |
| /* |
| * In this implementation, we can export/import only keydata in the |
| * following combinations: |
| * - domain parameters (+optional other params) |
| * - public key with associated domain parameters (+optional other params) |
| * - private key with associated public key and domain parameters |
| * (+optional other params) |
| * |
| * This means: |
| * - domain parameters must always be requested |
| * - private key must be requested alongside public key |
| * - other parameters are always optional |
| */ |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) == 0) |
| return 0; |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0 |
| && (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) == 0) |
| return 0; |
| |
| tmpl = OSSL_PARAM_BLD_new(); |
| if (tmpl == NULL) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| bnctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(ec)); |
| if (bnctx == NULL) { |
| ok = 0; |
| goto end; |
| } |
| BN_CTX_start(bnctx); |
| ok = ok && ossl_ec_group_todata(EC_KEY_get0_group(ec), tmpl, NULL, |
| ossl_ec_key_get_libctx(ec), |
| ossl_ec_key_get0_propq(ec), |
| bnctx, &genbuf); |
| } |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int include_private = |
| selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; |
| |
| ok = ok && key_to_params(ec, tmpl, NULL, include_private, &pub_key); |
| } |
| if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0) |
| ok = ok && otherparams_to_params(ec, tmpl, NULL); |
| |
| if (ok && (params = OSSL_PARAM_BLD_to_param(tmpl)) != NULL) |
| ok = param_cb(params, cbarg); |
| end: |
| OSSL_PARAM_free(params); |
| OSSL_PARAM_BLD_free(tmpl); |
| OPENSSL_free(pub_key); |
| OPENSSL_free(genbuf); |
| BN_CTX_end(bnctx); |
| BN_CTX_free(bnctx); |
| return ok; |
| } |
| |
| /* IMEXPORT = IMPORT + EXPORT */ |
| |
| # define EC_IMEXPORTABLE_DOM_PARAMETERS \ |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0), \ |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING, NULL, 0), \ |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, NULL, 0),\ |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_FIELD_TYPE, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_P, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_A, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_B, NULL, 0), \ |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_GENERATOR, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_ORDER, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_COFACTOR, NULL, 0), \ |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_SEED, NULL, 0) |
| |
| # define EC_IMEXPORTABLE_PUBLIC_KEY \ |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0) |
| # define EC_IMEXPORTABLE_PRIVATE_KEY \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0) |
| # define EC_IMEXPORTABLE_OTHER_PARAMETERS \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, NULL) |
| |
| /* |
| * Include all the possible combinations of OSSL_PARAM arrays for |
| * ec_imexport_types(). |
| * |
| * They are in a separate file as it is ~100 lines of unreadable and |
| * uninteresting machine generated stuff. |
| */ |
| #include "ec_kmgmt_imexport.inc" |
| |
| static ossl_inline |
| const OSSL_PARAM *ec_imexport_types(int selection) |
| { |
| int type_select = 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| type_select += 1; |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) |
| type_select += 2; |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| type_select += 4; |
| if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0) |
| type_select += 8; |
| return ec_types[type_select]; |
| } |
| |
| static |
| const OSSL_PARAM *ec_import_types(int selection) |
| { |
| return ec_imexport_types(selection); |
| } |
| |
| static |
| const OSSL_PARAM *ec_export_types(int selection) |
| { |
| return ec_imexport_types(selection); |
| } |
| |
| static int ec_get_ecm_params(const EC_GROUP *group, OSSL_PARAM params[]) |
| { |
| #ifdef OPENSSL_NO_EC2M |
| return 1; |
| #else |
| int ret = 0, m; |
| unsigned int k1 = 0, k2 = 0, k3 = 0; |
| int basis_nid; |
| const char *basis_name = NULL; |
| int fid = EC_GROUP_get_field_type(group); |
| |
| if (fid != NID_X9_62_characteristic_two_field) |
| return 1; |
| |
| basis_nid = EC_GROUP_get_basis_type(group); |
| if (basis_nid == NID_X9_62_tpBasis) |
| basis_name = SN_X9_62_tpBasis; |
| else if (basis_nid == NID_X9_62_ppBasis) |
| basis_name = SN_X9_62_ppBasis; |
| else |
| goto err; |
| |
| m = EC_GROUP_get_degree(group); |
| if (!ossl_param_build_set_int(NULL, params, OSSL_PKEY_PARAM_EC_CHAR2_M, m) |
| || !ossl_param_build_set_utf8_string(NULL, params, |
| OSSL_PKEY_PARAM_EC_CHAR2_TYPE, |
| basis_name)) |
| goto err; |
| |
| if (basis_nid == NID_X9_62_tpBasis) { |
| if (!EC_GROUP_get_trinomial_basis(group, &k1) |
| || !ossl_param_build_set_int(NULL, params, |
| OSSL_PKEY_PARAM_EC_CHAR2_TP_BASIS, |
| (int)k1)) |
| goto err; |
| } else { |
| if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3) |
| || !ossl_param_build_set_int(NULL, params, |
| OSSL_PKEY_PARAM_EC_CHAR2_PP_K1, (int)k1) |
| || !ossl_param_build_set_int(NULL, params, |
| OSSL_PKEY_PARAM_EC_CHAR2_PP_K2, (int)k2) |
| || !ossl_param_build_set_int(NULL, params, |
| OSSL_PKEY_PARAM_EC_CHAR2_PP_K3, (int)k3)) |
| goto err; |
| } |
| ret = 1; |
| err: |
| return ret; |
| #endif /* OPENSSL_NO_EC2M */ |
| } |
| |
| static |
| int common_get_params(void *key, OSSL_PARAM params[], int sm2) |
| { |
| int ret = 0; |
| EC_KEY *eck = key; |
| const EC_GROUP *ecg = NULL; |
| OSSL_PARAM *p; |
| unsigned char *pub_key = NULL, *genbuf = NULL; |
| OSSL_LIB_CTX *libctx; |
| const char *propq; |
| BN_CTX *bnctx = NULL; |
| |
| ecg = EC_KEY_get0_group(eck); |
| if (ecg == NULL) |
| return 0; |
| |
| libctx = ossl_ec_key_get_libctx(eck); |
| propq = ossl_ec_key_get0_propq(eck); |
| |
| bnctx = BN_CTX_new_ex(libctx); |
| if (bnctx == NULL) |
| return 0; |
| BN_CTX_start(bnctx); |
| |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL |
| && !OSSL_PARAM_set_int(p, ECDSA_size(eck))) |
| goto err; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL |
| && !OSSL_PARAM_set_int(p, EC_GROUP_order_bits(ecg))) |
| goto err; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL) { |
| int ecbits, sec_bits; |
| |
| ecbits = EC_GROUP_order_bits(ecg); |
| |
| /* |
| * The following estimates are based on the values published |
| * in Table 2 of "NIST Special Publication 800-57 Part 1 Revision 4" |
| * at http://dx.doi.org/10.6028/NIST.SP.800-57pt1r4 . |
| * |
| * Note that the above reference explicitly categorizes algorithms in a |
| * discrete set of values {80, 112, 128, 192, 256}, and that it is |
| * relevant only for NIST approved Elliptic Curves, while OpenSSL |
| * applies the same logic also to other curves. |
| * |
| * Classifications produced by other standardazing bodies might differ, |
| * so the results provided for "bits of security" by this provider are |
| * to be considered merely indicative, and it is the users' |
| * responsibility to compare these values against the normative |
| * references that may be relevant for their intent and purposes. |
| */ |
| if (ecbits >= 512) |
| sec_bits = 256; |
| else if (ecbits >= 384) |
| sec_bits = 192; |
| else if (ecbits >= 256) |
| sec_bits = 128; |
| else if (ecbits >= 224) |
| sec_bits = 112; |
| else if (ecbits >= 160) |
| sec_bits = 80; |
| else |
| sec_bits = ecbits / 2; |
| |
| if (!OSSL_PARAM_set_int(p, sec_bits)) |
| goto err; |
| } |
| |
| if ((p = OSSL_PARAM_locate(params, |
| OSSL_PKEY_PARAM_EC_DECODED_FROM_EXPLICIT_PARAMS)) |
| != NULL) { |
| int explicitparams = EC_KEY_decoded_from_explicit_params(eck); |
| |
| if (explicitparams < 0 |
| || !OSSL_PARAM_set_int(p, explicitparams)) |
| goto err; |
| } |
| |
| if (!sm2) { |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL |
| && !OSSL_PARAM_set_utf8_string(p, EC_DEFAULT_MD)) |
| goto err; |
| } else { |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL |
| && !OSSL_PARAM_set_utf8_string(p, SM2_DEFAULT_MD)) |
| goto err; |
| } |
| |
| /* SM2 doesn't support this PARAM */ |
| if (!sm2) { |
| p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH); |
| if (p != NULL) { |
| int ecdh_cofactor_mode = 0; |
| |
| ecdh_cofactor_mode = |
| (EC_KEY_get_flags(eck) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0; |
| |
| if (!OSSL_PARAM_set_int(p, ecdh_cofactor_mode)) |
| goto err; |
| } |
| } |
| if ((p = OSSL_PARAM_locate(params, |
| OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY)) != NULL) { |
| p->return_size = EC_POINT_point2oct(EC_KEY_get0_group(key), |
| EC_KEY_get0_public_key(key), |
| POINT_CONVERSION_UNCOMPRESSED, |
| p->data, p->return_size, bnctx); |
| if (p->return_size == 0) |
| goto err; |
| } |
| |
| ret = ec_get_ecm_params(ecg, params) |
| && ossl_ec_group_todata(ecg, NULL, params, libctx, propq, bnctx, |
| &genbuf) |
| && key_to_params(eck, NULL, params, 1, &pub_key) |
| && otherparams_to_params(eck, NULL, params); |
| err: |
| OPENSSL_free(genbuf); |
| OPENSSL_free(pub_key); |
| BN_CTX_end(bnctx); |
| BN_CTX_free(bnctx); |
| return ret; |
| } |
| |
| static |
| int ec_get_params(void *key, OSSL_PARAM params[]) |
| { |
| return common_get_params(key, params, 0); |
| } |
| |
| #ifndef OPENSSL_NO_EC2M |
| # define EC2M_GETTABLE_DOM_PARAMS \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_CHAR2_M, NULL), \ |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_CHAR2_TYPE, NULL, 0), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_CHAR2_TP_BASIS, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_CHAR2_PP_K1, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_CHAR2_PP_K2, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_CHAR2_PP_K3, NULL), |
| #else |
| # define EC2M_GETTABLE_DOM_PARAMS |
| #endif |
| |
| static const OSSL_PARAM ec_known_gettable_params[] = { |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_DECODED_FROM_EXPLICIT_PARAMS, NULL), |
| EC_IMEXPORTABLE_DOM_PARAMETERS, |
| EC2M_GETTABLE_DOM_PARAMS |
| EC_IMEXPORTABLE_PUBLIC_KEY, |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_PUB_X, NULL, 0), |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_PUB_Y, NULL, 0), |
| EC_IMEXPORTABLE_PRIVATE_KEY, |
| EC_IMEXPORTABLE_OTHER_PARAMETERS, |
| OSSL_PARAM_END |
| }; |
| |
| static |
| const OSSL_PARAM *ec_gettable_params(void *provctx) |
| { |
| return ec_known_gettable_params; |
| } |
| |
| static const OSSL_PARAM ec_known_settable_params[] = { |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, NULL, 0), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_SEED, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, NULL), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE, NULL, 0), |
| OSSL_PARAM_END |
| }; |
| |
| static |
| const OSSL_PARAM *ec_settable_params(void *provctx) |
| { |
| return ec_known_settable_params; |
| } |
| |
| static |
| int ec_set_params(void *key, const OSSL_PARAM params[]) |
| { |
| EC_KEY *eck = key; |
| const OSSL_PARAM *p; |
| |
| if (key == NULL) |
| return 0; |
| if (params == NULL) |
| return 1; |
| |
| |
| if (!ossl_ec_group_set_params((EC_GROUP *)EC_KEY_get0_group(key), params)) |
| return 0; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY); |
| if (p != NULL) { |
| BN_CTX *ctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(key)); |
| int ret = 1; |
| |
| if (ctx == NULL |
| || p->data_type != OSSL_PARAM_OCTET_STRING |
| || !EC_KEY_oct2key(key, p->data, p->data_size, ctx)) |
| ret = 0; |
| BN_CTX_free(ctx); |
| if (!ret) |
| return 0; |
| } |
| |
| return ossl_ec_key_otherparams_fromdata(eck, params); |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static |
| int sm2_get_params(void *key, OSSL_PARAM params[]) |
| { |
| return common_get_params(key, params, 1); |
| } |
| |
| static const OSSL_PARAM sm2_known_gettable_params[] = { |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_EC_DECODED_FROM_EXPLICIT_PARAMS, NULL), |
| EC_IMEXPORTABLE_DOM_PARAMETERS, |
| EC_IMEXPORTABLE_PUBLIC_KEY, |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_PUB_X, NULL, 0), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_PUB_Y, NULL, 0), |
| EC_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| |
| static |
| const OSSL_PARAM *sm2_gettable_params(ossl_unused void *provctx) |
| { |
| return sm2_known_gettable_params; |
| } |
| |
| static const OSSL_PARAM sm2_known_settable_params[] = { |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0), |
| OSSL_PARAM_END |
| }; |
| |
| static |
| const OSSL_PARAM *sm2_settable_params(ossl_unused void *provctx) |
| { |
| return sm2_known_settable_params; |
| } |
| |
| static |
| int sm2_validate(const void *keydata, int selection, int checktype) |
| { |
| const EC_KEY *eck = keydata; |
| int ok = 1; |
| BN_CTX *ctx = NULL; |
| |
| if (!ossl_prov_is_running()) |
| return 0; |
| |
| if ((selection & EC_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* nothing to validate */ |
| |
| ctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(eck)); |
| if (ctx == NULL) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| ok = ok && EC_GROUP_check(EC_KEY_get0_group(eck), ctx); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) { |
| if (checktype == OSSL_KEYMGMT_VALIDATE_QUICK_CHECK) |
| ok = ok && ossl_ec_key_public_check_quick(eck, ctx); |
| else |
| ok = ok && ossl_ec_key_public_check(eck, ctx); |
| } |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && ossl_sm2_key_private_check(eck); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == OSSL_KEYMGMT_SELECT_KEYPAIR) |
| ok = ok && ossl_ec_key_pairwise_check(eck, ctx); |
| |
| BN_CTX_free(ctx); |
| return ok; |
| } |
| # endif |
| #endif |
| |
| static |
| int ec_validate(const void *keydata, int selection, int checktype) |
| { |
| const EC_KEY *eck = keydata; |
| int ok = 1; |
| BN_CTX *ctx = NULL; |
| |
| if (!ossl_prov_is_running()) |
| return 0; |
| |
| if ((selection & EC_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* nothing to validate */ |
| |
| ctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(eck)); |
| if (ctx == NULL) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| int flags = EC_KEY_get_flags(eck); |
| |
| if ((flags & EC_FLAG_CHECK_NAMED_GROUP) != 0) |
| ok = ok && EC_GROUP_check_named_curve(EC_KEY_get0_group(eck), |
| (flags & EC_FLAG_CHECK_NAMED_GROUP_NIST) != 0, ctx); |
| else |
| ok = ok && EC_GROUP_check(EC_KEY_get0_group(eck), ctx); |
| } |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) { |
| if (checktype == OSSL_KEYMGMT_VALIDATE_QUICK_CHECK) |
| ok = ok && ossl_ec_key_public_check_quick(eck, ctx); |
| else |
| ok = ok && ossl_ec_key_public_check(eck, ctx); |
| } |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && ossl_ec_key_private_check(eck); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == OSSL_KEYMGMT_SELECT_KEYPAIR) |
| ok = ok && ossl_ec_key_pairwise_check(eck, ctx); |
| |
| BN_CTX_free(ctx); |
| return ok; |
| } |
| |
| struct ec_gen_ctx { |
| OSSL_LIB_CTX *libctx; |
| char *group_name; |
| char *encoding; |
| char *pt_format; |
| char *group_check; |
| char *field_type; |
| BIGNUM *p, *a, *b, *order, *cofactor; |
| unsigned char *gen, *seed; |
| size_t gen_len, seed_len; |
| int selection; |
| int ecdh_mode; |
| EC_GROUP *gen_group; |
| }; |
| |
| static void *ec_gen_init(void *provctx, int selection, |
| const OSSL_PARAM params[]) |
| { |
| OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx); |
| struct ec_gen_ctx *gctx = NULL; |
| |
| if (!ossl_prov_is_running() || (selection & (EC_POSSIBLE_SELECTIONS)) == 0) |
| return NULL; |
| |
| if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) { |
| gctx->libctx = libctx; |
| gctx->selection = selection; |
| gctx->ecdh_mode = 0; |
| } |
| if (!ec_gen_set_params(gctx, params)) { |
| OPENSSL_free(gctx); |
| gctx = NULL; |
| } |
| return gctx; |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static void *sm2_gen_init(void *provctx, int selection, |
| const OSSL_PARAM params[]) |
| { |
| struct ec_gen_ctx *gctx = ec_gen_init(provctx, selection, params); |
| |
| if (gctx != NULL) { |
| if (gctx->group_name != NULL) |
| return gctx; |
| if ((gctx->group_name = OPENSSL_strdup("sm2")) != NULL) |
| return gctx; |
| ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); |
| ec_gen_cleanup(gctx); |
| } |
| return NULL; |
| } |
| # endif |
| #endif |
| |
| static int ec_gen_set_group(void *genctx, const EC_GROUP *src) |
| { |
| struct ec_gen_ctx *gctx = genctx; |
| EC_GROUP *group; |
| |
| group = EC_GROUP_dup(src); |
| if (group == NULL) { |
| ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CURVE); |
| return 0; |
| } |
| EC_GROUP_free(gctx->gen_group); |
| gctx->gen_group = group; |
| return 1; |
| } |
| |
| static int ec_gen_set_template(void *genctx, void *templ) |
| { |
| struct ec_gen_ctx *gctx = genctx; |
| EC_KEY *ec = templ; |
| const EC_GROUP *ec_group; |
| |
| if (!ossl_prov_is_running() || gctx == NULL || ec == NULL) |
| return 0; |
| if ((ec_group = EC_KEY_get0_group(ec)) == NULL) |
| return 0; |
| return ec_gen_set_group(gctx, ec_group); |
| } |
| |
| #define COPY_INT_PARAM(params, key, val) \ |
| p = OSSL_PARAM_locate_const(params, key); \ |
| if (p != NULL && !OSSL_PARAM_get_int(p, &val)) \ |
| goto err; |
| |
| #define COPY_UTF8_PARAM(params, key, val) \ |
| p = OSSL_PARAM_locate_const(params, key); \ |
| if (p != NULL) { \ |
| if (p->data_type != OSSL_PARAM_UTF8_STRING) \ |
| goto err; \ |
| OPENSSL_free(val); \ |
| val = OPENSSL_strdup(p->data); \ |
| if (val == NULL) \ |
| goto err; \ |
| } |
| |
| #define COPY_OCTET_PARAM(params, key, val, len) \ |
| p = OSSL_PARAM_locate_const(params, key); \ |
| if (p != NULL) { \ |
| if (p->data_type != OSSL_PARAM_OCTET_STRING) \ |
| goto err; \ |
| OPENSSL_free(val); \ |
| len = p->data_size; \ |
| val = OPENSSL_memdup(p->data, p->data_size); \ |
| if (val == NULL) \ |
| goto err; \ |
| } |
| |
| #define COPY_BN_PARAM(params, key, bn) \ |
| p = OSSL_PARAM_locate_const(params, key); \ |
| if (p != NULL) { \ |
| if (bn == NULL) \ |
| bn = BN_new(); \ |
| if (bn == NULL || !OSSL_PARAM_get_BN(p, &bn)) \ |
| goto err; \ |
| } |
| |
| static int ec_gen_set_params(void *genctx, const OSSL_PARAM params[]) |
| { |
| int ret = 0; |
| struct ec_gen_ctx *gctx = genctx; |
| const OSSL_PARAM *p; |
| EC_GROUP *group = NULL; |
| |
| COPY_INT_PARAM(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, gctx->ecdh_mode); |
| |
| COPY_UTF8_PARAM(params, OSSL_PKEY_PARAM_GROUP_NAME, gctx->group_name); |
| COPY_UTF8_PARAM(params, OSSL_PKEY_PARAM_EC_FIELD_TYPE, gctx->field_type); |
| COPY_UTF8_PARAM(params, OSSL_PKEY_PARAM_EC_ENCODING, gctx->encoding); |
| COPY_UTF8_PARAM(params, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, gctx->pt_format); |
| COPY_UTF8_PARAM(params, OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE, gctx->group_check); |
| |
| COPY_BN_PARAM(params, OSSL_PKEY_PARAM_EC_P, gctx->p); |
| COPY_BN_PARAM(params, OSSL_PKEY_PARAM_EC_A, gctx->a); |
| COPY_BN_PARAM(params, OSSL_PKEY_PARAM_EC_B, gctx->b); |
| COPY_BN_PARAM(params, OSSL_PKEY_PARAM_EC_ORDER, gctx->order); |
| COPY_BN_PARAM(params, OSSL_PKEY_PARAM_EC_COFACTOR, gctx->cofactor); |
| |
| COPY_OCTET_PARAM(params, OSSL_PKEY_PARAM_EC_SEED, gctx->seed, gctx->seed_len); |
| COPY_OCTET_PARAM(params, OSSL_PKEY_PARAM_EC_GENERATOR, gctx->gen, |
| gctx->gen_len); |
| |
| ret = 1; |
| err: |
| EC_GROUP_free(group); |
| return ret; |
| } |
| |
| static int ec_gen_set_group_from_params(struct ec_gen_ctx *gctx) |
| { |
| int ret = 0; |
| OSSL_PARAM_BLD *bld; |
| OSSL_PARAM *params = NULL; |
| EC_GROUP *group = NULL; |
| |
| bld = OSSL_PARAM_BLD_new(); |
| if (bld == NULL) |
| return 0; |
| |
| if (gctx->encoding != NULL |
| && !OSSL_PARAM_BLD_push_utf8_string(bld, OSSL_PKEY_PARAM_EC_ENCODING, |
| gctx->encoding, 0)) |
| goto err; |
| |
| if (gctx->pt_format != NULL |
| && !OSSL_PARAM_BLD_push_utf8_string(bld, |
| OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, |
| gctx->pt_format, 0)) |
| goto err; |
| |
| if (gctx->group_name != NULL) { |
| if (!OSSL_PARAM_BLD_push_utf8_string(bld, OSSL_PKEY_PARAM_GROUP_NAME, |
| gctx->group_name, 0)) |
| goto err; |
| /* Ignore any other parameters if there is a group name */ |
| goto build; |
| } else if (gctx->field_type != NULL) { |
| if (!OSSL_PARAM_BLD_push_utf8_string(bld, OSSL_PKEY_PARAM_EC_FIELD_TYPE, |
| gctx->field_type, 0)) |
| goto err; |
| } else { |
| goto err; |
| } |
| if (gctx->p == NULL |
| || gctx->a == NULL |
| || gctx->b == NULL |
| || gctx->order == NULL |
| || !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_EC_P, gctx->p) |
| || !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_EC_A, gctx->a) |
| || !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_EC_B, gctx->b) |
| || !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_EC_ORDER, gctx->order)) |
| goto err; |
| |
| if (gctx->cofactor != NULL |
| && !OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_EC_COFACTOR, |
| gctx->cofactor)) |
| goto err; |
| |
| if (gctx->seed != NULL |
| && !OSSL_PARAM_BLD_push_octet_string(bld, OSSL_PKEY_PARAM_EC_SEED, |
| gctx->seed, gctx->seed_len)) |
| goto err; |
| |
| if (gctx->gen == NULL |
| || !OSSL_PARAM_BLD_push_octet_string(bld, OSSL_PKEY_PARAM_EC_GENERATOR, |
| gctx->gen, gctx->gen_len)) |
| goto err; |
| build: |
| params = OSSL_PARAM_BLD_to_param(bld); |
| if (params == NULL) |
| goto err; |
| group = EC_GROUP_new_from_params(params, gctx->libctx, NULL); |
| if (group == NULL) |
| goto err; |
| |
| EC_GROUP_free(gctx->gen_group); |
| gctx->gen_group = group; |
| |
| ret = 1; |
| err: |
| OSSL_PARAM_free(params); |
| OSSL_PARAM_BLD_free(bld); |
| return ret; |
| } |
| |
| static const OSSL_PARAM *ec_gen_settable_params(ossl_unused void *genctx, |
| ossl_unused void *provctx) |
| { |
| static OSSL_PARAM settable[] = { |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_EC_FIELD_TYPE, NULL, 0), |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_P, NULL, 0), |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_A, NULL, 0), |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_B, NULL, 0), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_GENERATOR, NULL, 0), |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_ORDER, NULL, 0), |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_EC_COFACTOR, NULL, 0), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_EC_SEED, NULL, 0), |
| OSSL_PARAM_END |
| }; |
| |
| return settable; |
| } |
| |
| static int ec_gen_assign_group(EC_KEY *ec, EC_GROUP *group) |
| { |
| if (group == NULL) { |
| ERR_raise(ERR_LIB_PROV, PROV_R_NO_PARAMETERS_SET); |
| return 0; |
| } |
| return EC_KEY_set_group(ec, group) > 0; |
| } |
| |
| /* |
| * The callback arguments (osslcb & cbarg) are not used by EC_KEY generation |
| */ |
| static void *ec_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg) |
| { |
| struct ec_gen_ctx *gctx = genctx; |
| EC_KEY *ec = NULL; |
| int ret = 0; |
| |
| if (!ossl_prov_is_running() |
| || gctx == NULL |
| || (ec = EC_KEY_new_ex(gctx->libctx, NULL)) == NULL) |
| return NULL; |
| |
| if (gctx->gen_group == NULL) { |
| if (!ec_gen_set_group_from_params(gctx)) |
| goto err; |
| } else { |
| if (gctx->encoding != NULL) { |
| int flags = ossl_ec_encoding_name2id(gctx->encoding); |
| |
| if (flags < 0) |
| goto err; |
| EC_GROUP_set_asn1_flag(gctx->gen_group, flags); |
| } |
| if (gctx->pt_format != NULL) { |
| int format = ossl_ec_pt_format_name2id(gctx->pt_format); |
| |
| if (format < 0) |
| goto err; |
| EC_GROUP_set_point_conversion_form(gctx->gen_group, format); |
| } |
| } |
| |
| /* We must always assign a group, no matter what */ |
| ret = ec_gen_assign_group(ec, gctx->gen_group); |
| |
| /* Whether you want it or not, you get a keypair, not just one half */ |
| if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) |
| ret = ret && EC_KEY_generate_key(ec); |
| |
| if (gctx->ecdh_mode != -1) |
| ret = ret && ossl_ec_set_ecdh_cofactor_mode(ec, gctx->ecdh_mode); |
| |
| if (gctx->group_check != NULL) |
| ret = ret && ossl_ec_set_check_group_type_from_name(ec, gctx->group_check); |
| if (ret) |
| return ec; |
| err: |
| /* Something went wrong, throw the key away */ |
| EC_KEY_free(ec); |
| return NULL; |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| /* |
| * The callback arguments (osslcb & cbarg) are not used by EC_KEY generation |
| */ |
| static void *sm2_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg) |
| { |
| struct ec_gen_ctx *gctx = genctx; |
| EC_KEY *ec = NULL; |
| int ret = 1; |
| |
| if (gctx == NULL |
| || (ec = EC_KEY_new_ex(gctx->libctx, NULL)) == NULL) |
| return NULL; |
| |
| if (gctx->gen_group == NULL) { |
| if (!ec_gen_set_group_from_params(gctx)) |
| goto err; |
| } else { |
| if (gctx->encoding) { |
| int flags = ossl_ec_encoding_name2id(gctx->encoding); |
| |
| if (flags < 0) |
| goto err; |
| EC_GROUP_set_asn1_flag(gctx->gen_group, flags); |
| } |
| if (gctx->pt_format != NULL) { |
| int format = ossl_ec_pt_format_name2id(gctx->pt_format); |
| |
| if (format < 0) |
| goto err; |
| EC_GROUP_set_point_conversion_form(gctx->gen_group, format); |
| } |
| } |
| |
| /* We must always assign a group, no matter what */ |
| ret = ec_gen_assign_group(ec, gctx->gen_group); |
| |
| /* Whether you want it or not, you get a keypair, not just one half */ |
| if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) |
| ret = ret && EC_KEY_generate_key(ec); |
| |
| if (ret) |
| return ec; |
| err: |
| /* Something went wrong, throw the key away */ |
| EC_KEY_free(ec); |
| return NULL; |
| } |
| # endif |
| #endif |
| |
| static void ec_gen_cleanup(void *genctx) |
| { |
| struct ec_gen_ctx *gctx = genctx; |
| |
| if (gctx == NULL) |
| return; |
| |
| EC_GROUP_free(gctx->gen_group); |
| BN_free(gctx->p); |
| BN_free(gctx->a); |
| BN_free(gctx->b); |
| BN_free(gctx->order); |
| BN_free(gctx->cofactor); |
| OPENSSL_free(gctx->group_name); |
| OPENSSL_free(gctx->field_type); |
| OPENSSL_free(gctx->pt_format); |
| OPENSSL_free(gctx->encoding); |
| OPENSSL_free(gctx->seed); |
| OPENSSL_free(gctx->gen); |
| OPENSSL_free(gctx); |
| } |
| |
| static void *common_load(const void *reference, size_t reference_sz, |
| int sm2_wanted) |
| { |
| EC_KEY *ec = NULL; |
| |
| if (ossl_prov_is_running() && reference_sz == sizeof(ec)) { |
| /* The contents of the reference is the address to our object */ |
| ec = *(EC_KEY **)reference; |
| |
| if (!common_check_sm2(ec, sm2_wanted)) |
| return NULL; |
| |
| /* We grabbed, so we detach it */ |
| *(EC_KEY **)reference = NULL; |
| return ec; |
| } |
| return NULL; |
| } |
| |
| static void *ec_load(const void *reference, size_t reference_sz) |
| { |
| return common_load(reference, reference_sz, 0); |
| } |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| static void *sm2_load(const void *reference, size_t reference_sz) |
| { |
| return common_load(reference, reference_sz, 1); |
| } |
| # endif |
| #endif |
| |
| static void *ec_dup(const void *keydata_from, int selection) |
| { |
| if (ossl_prov_is_running()) |
| return ossl_ec_key_dup(keydata_from, selection); |
| return NULL; |
| } |
| |
| const OSSL_DISPATCH ossl_ec_keymgmt_functions[] = { |
| { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))ec_newdata }, |
| { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))ec_gen_init }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, |
| (void (*)(void))ec_gen_set_template }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))ec_gen_set_params }, |
| { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS, |
| (void (*)(void))ec_gen_settable_params }, |
| { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))ec_gen }, |
| { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))ec_gen_cleanup }, |
| { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))ec_load }, |
| { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))ec_freedata }, |
| { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))ec_get_params }, |
| { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))ec_gettable_params }, |
| { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))ec_set_params }, |
| { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))ec_settable_params }, |
| { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))ec_has }, |
| { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))ec_match }, |
| { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))ec_validate }, |
| { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))ec_import }, |
| { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))ec_import_types }, |
| { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))ec_export }, |
| { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))ec_export_types }, |
| { OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME, |
| (void (*)(void))ec_query_operation_name }, |
| { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))ec_dup }, |
| { 0, NULL } |
| }; |
| |
| #ifndef FIPS_MODULE |
| # ifndef OPENSSL_NO_SM2 |
| const OSSL_DISPATCH ossl_sm2_keymgmt_functions[] = { |
| { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))sm2_newdata }, |
| { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))sm2_gen_init }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, |
| (void (*)(void))ec_gen_set_template }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))ec_gen_set_params }, |
| { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS, |
| (void (*)(void))ec_gen_settable_params }, |
| { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))sm2_gen }, |
| { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))ec_gen_cleanup }, |
| { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))sm2_load }, |
| { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))ec_freedata }, |
| { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))sm2_get_params }, |
| { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))sm2_gettable_params }, |
| { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))ec_set_params }, |
| { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))sm2_settable_params }, |
| { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))ec_has }, |
| { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))ec_match }, |
| { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))sm2_validate }, |
| { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))sm2_import }, |
| { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))ec_import_types }, |
| { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))ec_export }, |
| { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))ec_export_types }, |
| { OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME, |
| (void (*)(void))sm2_query_operation_name }, |
| { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))ec_dup }, |
| { 0, NULL } |
| }; |
| # endif |
| #endif |
