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ce64d3ee | 1 | /* |
4333b89f | 2 | * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. |
ce64d3ee MC |
3 | * |
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 | |
8 | */ | |
9 | ||
5b5eea4b SL |
10 | #include "internal/deprecated.h" |
11 | ||
ce64d3ee MC |
12 | #include <openssl/crypto.h> |
13 | #include <openssl/evp.h> | |
14 | #include <openssl/core_dispatch.h> | |
15 | #include <openssl/core_names.h> | |
16 | #include <openssl/params.h> | |
17 | #include <openssl/err.h> | |
2741128e | 18 | #include <openssl/proverr.h> |
9d0dd1d5 | 19 | #include "crypto/sm2.h" |
ce64d3ee MC |
20 | #include "prov/provider_ctx.h" |
21 | #include "prov/implementations.h" | |
22 | #include "prov/provider_util.h" | |
23 | ||
24 | static OSSL_FUNC_asym_cipher_newctx_fn sm2_newctx; | |
25 | static OSSL_FUNC_asym_cipher_encrypt_init_fn sm2_init; | |
26 | static OSSL_FUNC_asym_cipher_encrypt_fn sm2_asym_encrypt; | |
27 | static OSSL_FUNC_asym_cipher_decrypt_init_fn sm2_init; | |
28 | static OSSL_FUNC_asym_cipher_decrypt_fn sm2_asym_decrypt; | |
29 | static OSSL_FUNC_asym_cipher_freectx_fn sm2_freectx; | |
30 | static OSSL_FUNC_asym_cipher_dupctx_fn sm2_dupctx; | |
31 | static OSSL_FUNC_asym_cipher_get_ctx_params_fn sm2_get_ctx_params; | |
32 | static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn sm2_gettable_ctx_params; | |
33 | static OSSL_FUNC_asym_cipher_set_ctx_params_fn sm2_set_ctx_params; | |
34 | static OSSL_FUNC_asym_cipher_settable_ctx_params_fn sm2_settable_ctx_params; | |
35 | ||
36 | /* | |
37 | * What's passed as an actual key is defined by the KEYMGMT interface. | |
38 | * We happen to know that our KEYMGMT simply passes EC_KEY structures, so | |
39 | * we use that here too. | |
40 | */ | |
41 | ||
42 | typedef struct { | |
b4250010 | 43 | OSSL_LIB_CTX *libctx; |
ce64d3ee MC |
44 | EC_KEY *key; |
45 | PROV_DIGEST md; | |
46 | } PROV_SM2_CTX; | |
47 | ||
48 | static void *sm2_newctx(void *provctx) | |
49 | { | |
50 | PROV_SM2_CTX *psm2ctx = OPENSSL_zalloc(sizeof(PROV_SM2_CTX)); | |
51 | ||
52 | if (psm2ctx == NULL) | |
53 | return NULL; | |
a829b735 | 54 | psm2ctx->libctx = PROV_LIBCTX_OF(provctx); |
ce64d3ee MC |
55 | |
56 | return psm2ctx; | |
57 | } | |
58 | ||
cbdeb04c | 59 | static int sm2_init(void *vpsm2ctx, void *vkey, const OSSL_PARAM params[]) |
ce64d3ee MC |
60 | { |
61 | PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; | |
62 | ||
63 | if (psm2ctx == NULL || vkey == NULL || !EC_KEY_up_ref(vkey)) | |
64 | return 0; | |
65 | EC_KEY_free(psm2ctx->key); | |
66 | psm2ctx->key = vkey; | |
67 | ||
cbdeb04c | 68 | return sm2_set_ctx_params(psm2ctx, params); |
ce64d3ee MC |
69 | } |
70 | ||
71 | static const EVP_MD *sm2_get_md(PROV_SM2_CTX *psm2ctx) | |
72 | { | |
73 | const EVP_MD *md = ossl_prov_digest_md(&psm2ctx->md); | |
74 | ||
75 | if (md == NULL) | |
76 | md = ossl_prov_digest_fetch(&psm2ctx->md, psm2ctx->libctx, "SM3", NULL); | |
77 | ||
78 | return md; | |
79 | } | |
80 | ||
81 | static int sm2_asym_encrypt(void *vpsm2ctx, unsigned char *out, size_t *outlen, | |
82 | size_t outsize, const unsigned char *in, | |
83 | size_t inlen) | |
84 | { | |
85 | PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; | |
86 | const EVP_MD *md = sm2_get_md(psm2ctx); | |
87 | ||
88 | if (md == NULL) | |
89 | return 0; | |
90 | ||
91 | if (out == NULL) { | |
32ab57cb | 92 | if (!ossl_sm2_ciphertext_size(psm2ctx->key, md, inlen, outlen)) { |
ce64d3ee MC |
93 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY); |
94 | return 0; | |
95 | } | |
96 | return 1; | |
97 | } | |
98 | ||
32ab57cb | 99 | return ossl_sm2_encrypt(psm2ctx->key, md, in, inlen, out, outlen); |
ce64d3ee MC |
100 | } |
101 | ||
102 | static int sm2_asym_decrypt(void *vpsm2ctx, unsigned char *out, size_t *outlen, | |
103 | size_t outsize, const unsigned char *in, | |
104 | size_t inlen) | |
105 | { | |
106 | PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; | |
107 | const EVP_MD *md = sm2_get_md(psm2ctx); | |
108 | ||
109 | if (md == NULL) | |
110 | return 0; | |
111 | ||
112 | if (out == NULL) { | |
36cf45ef | 113 | if (!ossl_sm2_plaintext_size(in, inlen, outlen)) |
ce64d3ee MC |
114 | return 0; |
115 | return 1; | |
116 | } | |
117 | ||
32ab57cb | 118 | return ossl_sm2_decrypt(psm2ctx->key, md, in, inlen, out, outlen); |
ce64d3ee MC |
119 | } |
120 | ||
121 | static void sm2_freectx(void *vpsm2ctx) | |
122 | { | |
123 | PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; | |
124 | ||
125 | EC_KEY_free(psm2ctx->key); | |
126 | ossl_prov_digest_reset(&psm2ctx->md); | |
127 | ||
128 | OPENSSL_free(psm2ctx); | |
129 | } | |
130 | ||
131 | static void *sm2_dupctx(void *vpsm2ctx) | |
132 | { | |
133 | PROV_SM2_CTX *srcctx = (PROV_SM2_CTX *)vpsm2ctx; | |
134 | PROV_SM2_CTX *dstctx; | |
135 | ||
136 | dstctx = OPENSSL_zalloc(sizeof(*srcctx)); | |
137 | if (dstctx == NULL) | |
138 | return NULL; | |
139 | ||
140 | *dstctx = *srcctx; | |
141 | if (dstctx->key != NULL && !EC_KEY_up_ref(dstctx->key)) { | |
142 | OPENSSL_free(dstctx); | |
143 | return NULL; | |
144 | } | |
145 | ||
146 | if (!ossl_prov_digest_copy(&dstctx->md, &srcctx->md)) { | |
147 | sm2_freectx(dstctx); | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | return dstctx; | |
152 | } | |
153 | ||
154 | static int sm2_get_ctx_params(void *vpsm2ctx, OSSL_PARAM *params) | |
155 | { | |
156 | PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; | |
157 | OSSL_PARAM *p; | |
158 | ||
cbdeb04c | 159 | if (vpsm2ctx == NULL) |
ce64d3ee MC |
160 | return 0; |
161 | ||
162 | p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_DIGEST); | |
163 | if (p != NULL) { | |
164 | const EVP_MD *md = ossl_prov_digest_md(&psm2ctx->md); | |
165 | ||
166 | if (!OSSL_PARAM_set_utf8_string(p, md == NULL ? "" | |
ed576acd | 167 | : EVP_MD_get0_name(md))) |
ce64d3ee MC |
168 | return 0; |
169 | } | |
170 | ||
171 | return 1; | |
172 | } | |
173 | ||
174 | static const OSSL_PARAM known_gettable_ctx_params[] = { | |
175 | OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST, NULL, 0), | |
176 | OSSL_PARAM_END | |
177 | }; | |
178 | ||
fb67126e TM |
179 | static const OSSL_PARAM *sm2_gettable_ctx_params(ossl_unused void *vpsm2ctx, |
180 | ossl_unused void *provctx) | |
ce64d3ee MC |
181 | { |
182 | return known_gettable_ctx_params; | |
183 | } | |
184 | ||
185 | static int sm2_set_ctx_params(void *vpsm2ctx, const OSSL_PARAM params[]) | |
186 | { | |
187 | PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; | |
188 | ||
cbdeb04c | 189 | if (psm2ctx == NULL) |
ce64d3ee | 190 | return 0; |
cbdeb04c P |
191 | if (params == NULL) |
192 | return 1; | |
ce64d3ee MC |
193 | |
194 | if (!ossl_prov_digest_load_from_params(&psm2ctx->md, params, | |
195 | psm2ctx->libctx)) | |
196 | return 0; | |
197 | ||
198 | return 1; | |
199 | } | |
200 | ||
201 | static const OSSL_PARAM known_settable_ctx_params[] = { | |
202 | OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_DIGEST, NULL, 0), | |
203 | OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PROPERTIES, NULL, 0), | |
204 | OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_ENGINE, NULL, 0), | |
205 | OSSL_PARAM_END | |
206 | }; | |
207 | ||
fb67126e TM |
208 | static const OSSL_PARAM *sm2_settable_ctx_params(ossl_unused void *vpsm2ctx, |
209 | ossl_unused void *provctx) | |
ce64d3ee MC |
210 | { |
211 | return known_settable_ctx_params; | |
212 | } | |
213 | ||
58f422f6 | 214 | const OSSL_DISPATCH ossl_sm2_asym_cipher_functions[] = { |
ce64d3ee MC |
215 | { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))sm2_newctx }, |
216 | { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))sm2_init }, | |
217 | { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))sm2_asym_encrypt }, | |
218 | { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))sm2_init }, | |
219 | { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))sm2_asym_decrypt }, | |
220 | { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))sm2_freectx }, | |
221 | { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))sm2_dupctx }, | |
222 | { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS, | |
223 | (void (*)(void))sm2_get_ctx_params }, | |
224 | { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS, | |
225 | (void (*)(void))sm2_gettable_ctx_params }, | |
226 | { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS, | |
227 | (void (*)(void))sm2_set_ctx_params }, | |
228 | { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS, | |
229 | (void (*)(void))sm2_settable_ctx_params }, | |
230 | { 0, NULL } | |
231 | }; |