2 * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/crypto.h>
11 #include <openssl/evp.h>
12 #include <openssl/core_dispatch.h>
13 #include <openssl/core_names.h>
14 #include <openssl/params.h>
15 #include <openssl/err.h>
16 #include <crypto/sm2.h>
17 #include "prov/providercommonerr.h"
18 #include "prov/provider_ctx.h"
19 #include "prov/implementations.h"
20 #include "prov/provider_util.h"
22 static OSSL_FUNC_asym_cipher_newctx_fn sm2_newctx;
23 static OSSL_FUNC_asym_cipher_encrypt_init_fn sm2_init;
24 static OSSL_FUNC_asym_cipher_encrypt_fn sm2_asym_encrypt;
25 static OSSL_FUNC_asym_cipher_decrypt_init_fn sm2_init;
26 static OSSL_FUNC_asym_cipher_decrypt_fn sm2_asym_decrypt;
27 static OSSL_FUNC_asym_cipher_freectx_fn sm2_freectx;
28 static OSSL_FUNC_asym_cipher_dupctx_fn sm2_dupctx;
29 static OSSL_FUNC_asym_cipher_get_ctx_params_fn sm2_get_ctx_params;
30 static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn sm2_gettable_ctx_params;
31 static OSSL_FUNC_asym_cipher_set_ctx_params_fn sm2_set_ctx_params;
32 static OSSL_FUNC_asym_cipher_settable_ctx_params_fn sm2_settable_ctx_params;
35 * What's passed as an actual key is defined by the KEYMGMT interface.
36 * We happen to know that our KEYMGMT simply passes EC_KEY structures, so
37 * we use that here too.
46 static void *sm2_newctx(void *provctx)
48 PROV_SM2_CTX *psm2ctx = OPENSSL_zalloc(sizeof(PROV_SM2_CTX));
52 psm2ctx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
57 static int sm2_init(void *vpsm2ctx, void *vkey)
59 PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx;
61 if (psm2ctx == NULL || vkey == NULL || !EC_KEY_up_ref(vkey))
63 EC_KEY_free(psm2ctx->key);
69 static const EVP_MD *sm2_get_md(PROV_SM2_CTX *psm2ctx)
71 const EVP_MD *md = ossl_prov_digest_md(&psm2ctx->md);
74 md = ossl_prov_digest_fetch(&psm2ctx->md, psm2ctx->libctx, "SM3", NULL);
79 static int sm2_asym_encrypt(void *vpsm2ctx, unsigned char *out, size_t *outlen,
80 size_t outsize, const unsigned char *in,
83 PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx;
84 const EVP_MD *md = sm2_get_md(psm2ctx);
90 if (!sm2_ciphertext_size(psm2ctx->key, md, inlen, outlen)) {
91 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
97 return sm2_encrypt(psm2ctx->key, md, in, inlen, out, outlen);
100 static int sm2_asym_decrypt(void *vpsm2ctx, unsigned char *out, size_t *outlen,
101 size_t outsize, const unsigned char *in,
104 PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx;
105 const EVP_MD *md = sm2_get_md(psm2ctx);
111 if (!sm2_plaintext_size(psm2ctx->key, md, inlen, outlen))
116 return sm2_decrypt(psm2ctx->key, md, in, inlen, out, outlen);
119 static void sm2_freectx(void *vpsm2ctx)
121 PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx;
123 EC_KEY_free(psm2ctx->key);
124 ossl_prov_digest_reset(&psm2ctx->md);
126 OPENSSL_free(psm2ctx);
129 static void *sm2_dupctx(void *vpsm2ctx)
131 PROV_SM2_CTX *srcctx = (PROV_SM2_CTX *)vpsm2ctx;
132 PROV_SM2_CTX *dstctx;
134 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
139 if (dstctx->key != NULL && !EC_KEY_up_ref(dstctx->key)) {
140 OPENSSL_free(dstctx);
144 if (!ossl_prov_digest_copy(&dstctx->md, &srcctx->md)) {
152 static int sm2_get_ctx_params(void *vpsm2ctx, OSSL_PARAM *params)
154 PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx;
157 if (vpsm2ctx == NULL || params == NULL)
160 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_DIGEST);
162 const EVP_MD *md = ossl_prov_digest_md(&psm2ctx->md);
164 if (!OSSL_PARAM_set_utf8_string(p, md == NULL ? ""
172 static const OSSL_PARAM known_gettable_ctx_params[] = {
173 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST, NULL, 0),
177 static const OSSL_PARAM *sm2_gettable_ctx_params(ossl_unused void *provctx)
179 return known_gettable_ctx_params;
182 static int sm2_set_ctx_params(void *vpsm2ctx, const OSSL_PARAM params[])
184 PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx;
186 if (psm2ctx == NULL || params == NULL)
189 if (!ossl_prov_digest_load_from_params(&psm2ctx->md, params,
196 static const OSSL_PARAM known_settable_ctx_params[] = {
197 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST, NULL, 0),
198 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PROPERTIES, NULL, 0),
199 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_ENGINE, NULL, 0),
203 static const OSSL_PARAM *sm2_settable_ctx_params(ossl_unused void *provctx)
205 return known_settable_ctx_params;
208 const OSSL_DISPATCH sm2_asym_cipher_functions[] = {
209 { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))sm2_newctx },
210 { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))sm2_init },
211 { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))sm2_asym_encrypt },
212 { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))sm2_init },
213 { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))sm2_asym_decrypt },
214 { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))sm2_freectx },
215 { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))sm2_dupctx },
216 { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
217 (void (*)(void))sm2_get_ctx_params },
218 { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
219 (void (*)(void))sm2_gettable_ctx_params },
220 { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
221 (void (*)(void))sm2_set_ctx_params },
222 { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
223 (void (*)(void))sm2_settable_ctx_params },