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d02b48c6 | 1 | /* crypto/evp/digest.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
0f113f3e | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
5ba372b1 BM |
58 | /* ==================================================================== |
59 | * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
5ba372b1 BM |
67 | * |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
d02b48c6 RE |
111 | |
112 | #include <stdio.h> | |
b39fc560 | 113 | #include "internal/cryptlib.h" |
ec577822 BM |
114 | #include <openssl/objects.h> |
115 | #include <openssl/evp.h> | |
0b13e9f0 | 116 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 117 | # include <openssl/engine.h> |
0b13e9f0 | 118 | #endif |
ab0a14bb | 119 | #include "internal/evp_int.h" |
77a01145 | 120 | #include "evp_locl.h" |
d02b48c6 | 121 | |
74cabf3f | 122 | /* This call frees resources associated with the context */ |
959ed531 | 123 | int EVP_MD_CTX_reset(EVP_MD_CTX *ctx) |
0f113f3e | 124 | { |
74cabf3f RL |
125 | if (ctx == NULL) |
126 | return 1; | |
127 | ||
128 | /* | |
129 | * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because | |
130 | * sometimes only copies of the context are ever finalised. | |
131 | */ | |
132 | if (ctx->digest && ctx->digest->cleanup | |
133 | && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED)) | |
134 | ctx->digest->cleanup(ctx); | |
135 | if (ctx->digest && ctx->digest->ctx_size && ctx->md_data | |
136 | && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) { | |
137 | OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size); | |
138 | } | |
139 | EVP_PKEY_CTX_free(ctx->pctx); | |
140 | #ifndef OPENSSL_NO_ENGINE | |
141 | if (ctx->engine) | |
142 | /* | |
143 | * The EVP_MD we used belongs to an ENGINE, release the functional | |
144 | * reference we held for this reason. | |
145 | */ | |
146 | ENGINE_finish(ctx->engine); | |
147 | #endif | |
16f8d4eb | 148 | memset(ctx, 0, sizeof(*ctx)); |
74cabf3f RL |
149 | |
150 | return 1; | |
0f113f3e | 151 | } |
dbad1690 | 152 | |
959ed531 | 153 | EVP_MD_CTX *EVP_MD_CTX_new(void) |
0f113f3e | 154 | { |
74cabf3f RL |
155 | return OPENSSL_zalloc(sizeof(EVP_MD_CTX)); |
156 | } | |
dbad1690 | 157 | |
959ed531 | 158 | void EVP_MD_CTX_free(EVP_MD_CTX *ctx) |
74cabf3f | 159 | { |
959ed531 | 160 | EVP_MD_CTX_reset(ctx); |
74cabf3f | 161 | OPENSSL_free(ctx); |
0f113f3e | 162 | } |
dbad1690 | 163 | |
2dc769a1 | 164 | int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) |
0f113f3e | 165 | { |
959ed531 | 166 | EVP_MD_CTX_reset(ctx); |
0f113f3e MC |
167 | return EVP_DigestInit_ex(ctx, type, NULL); |
168 | } | |
0fea7ed4 | 169 | |
11a57c7b | 170 | int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) |
0f113f3e MC |
171 | { |
172 | EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); | |
0b13e9f0 | 173 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
174 | /* |
175 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
176 | * this context may already have an ENGINE! Try to avoid releasing the | |
177 | * previous handle, re-querying for an ENGINE, and having a | |
178 | * reinitialisation, when it may all be unecessary. | |
179 | */ | |
180 | if (ctx->engine && ctx->digest && (!type || | |
181 | (type | |
182 | && (type->type == | |
183 | ctx->digest->type)))) | |
184 | goto skip_to_init; | |
185 | if (type) { | |
186 | /* | |
187 | * Ensure an ENGINE left lying around from last time is cleared (the | |
188 | * previous check attempted to avoid this if the same ENGINE and | |
189 | * EVP_MD could be used). | |
190 | */ | |
191 | if (ctx->engine) | |
192 | ENGINE_finish(ctx->engine); | |
193 | if (impl) { | |
194 | if (!ENGINE_init(impl)) { | |
195 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
196 | return 0; | |
197 | } | |
198 | } else | |
199 | /* Ask if an ENGINE is reserved for this job */ | |
200 | impl = ENGINE_get_digest_engine(type->type); | |
201 | if (impl) { | |
202 | /* There's an ENGINE for this job ... (apparently) */ | |
203 | const EVP_MD *d = ENGINE_get_digest(impl, type->type); | |
204 | if (!d) { | |
205 | /* Same comment from evp_enc.c */ | |
206 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
207 | ENGINE_finish(impl); | |
208 | return 0; | |
209 | } | |
210 | /* We'll use the ENGINE's private digest definition */ | |
211 | type = d; | |
212 | /* | |
213 | * Store the ENGINE functional reference so we know 'type' came | |
214 | * from an ENGINE and we need to release it when done. | |
215 | */ | |
216 | ctx->engine = impl; | |
217 | } else | |
218 | ctx->engine = NULL; | |
a0108702 MC |
219 | } else { |
220 | if (!ctx->digest) { | |
221 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET); | |
222 | return 0; | |
223 | } | |
224 | type = ctx->digest; | |
0f113f3e | 225 | } |
90e8a310 | 226 | #endif |
0f113f3e MC |
227 | if (ctx->digest != type) { |
228 | if (ctx->digest && ctx->digest->ctx_size) | |
229 | OPENSSL_free(ctx->md_data); | |
230 | ctx->digest = type; | |
231 | if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) { | |
232 | ctx->update = type->update; | |
233 | ctx->md_data = OPENSSL_malloc(type->ctx_size); | |
234 | if (ctx->md_data == NULL) { | |
235 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE); | |
236 | return 0; | |
237 | } | |
238 | } | |
239 | } | |
0b13e9f0 | 240 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 241 | skip_to_init: |
0b13e9f0 | 242 | #endif |
0f113f3e MC |
243 | if (ctx->pctx) { |
244 | int r; | |
245 | r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, | |
246 | EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); | |
247 | if (r <= 0 && (r != -2)) | |
248 | return 0; | |
249 | } | |
250 | if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) | |
251 | return 1; | |
252 | return ctx->digest->init(ctx); | |
253 | } | |
d02b48c6 | 254 | |
f80921b6 | 255 | int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count) |
0f113f3e MC |
256 | { |
257 | return ctx->update(ctx, data, count); | |
258 | } | |
d02b48c6 | 259 | |
dbad1690 | 260 | /* The caller can assume that this removes any secret data from the context */ |
2dc769a1 | 261 | int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) |
0f113f3e MC |
262 | { |
263 | int ret; | |
264 | ret = EVP_DigestFinal_ex(ctx, md, size); | |
959ed531 | 265 | EVP_MD_CTX_reset(ctx); |
0f113f3e MC |
266 | return ret; |
267 | } | |
20d2186c DSH |
268 | |
269 | /* The caller can assume that this removes any secret data from the context */ | |
270 | int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) | |
0f113f3e MC |
271 | { |
272 | int ret; | |
54a656ef | 273 | |
0f113f3e MC |
274 | OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE); |
275 | ret = ctx->digest->final(ctx, md); | |
276 | if (size != NULL) | |
277 | *size = ctx->digest->md_size; | |
278 | if (ctx->digest->cleanup) { | |
279 | ctx->digest->cleanup(ctx); | |
280 | EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); | |
281 | } | |
282 | memset(ctx->md_data, 0, ctx->digest->ctx_size); | |
283 | return ret; | |
284 | } | |
351d8998 | 285 | |
dbad1690 | 286 | int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
0f113f3e | 287 | { |
959ed531 | 288 | EVP_MD_CTX_reset(out); |
0f113f3e MC |
289 | return EVP_MD_CTX_copy_ex(out, in); |
290 | } | |
20d2186c DSH |
291 | |
292 | int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) | |
0f113f3e MC |
293 | { |
294 | unsigned char *tmp_buf; | |
295 | if ((in == NULL) || (in->digest == NULL)) { | |
296 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED); | |
297 | return 0; | |
298 | } | |
0b13e9f0 | 299 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
300 | /* Make sure it's safe to copy a digest context using an ENGINE */ |
301 | if (in->engine && !ENGINE_init(in->engine)) { | |
302 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB); | |
303 | return 0; | |
304 | } | |
0b13e9f0 | 305 | #endif |
26188931 | 306 | |
0f113f3e MC |
307 | if (out->digest == in->digest) { |
308 | tmp_buf = out->md_data; | |
309 | EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE); | |
310 | } else | |
311 | tmp_buf = NULL; | |
959ed531 | 312 | EVP_MD_CTX_reset(out); |
b4faea50 | 313 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
314 | |
315 | if (in->md_data && out->digest->ctx_size) { | |
316 | if (tmp_buf) | |
317 | out->md_data = tmp_buf; | |
318 | else { | |
319 | out->md_data = OPENSSL_malloc(out->digest->ctx_size); | |
90945fa3 | 320 | if (out->md_data == NULL) { |
0f113f3e MC |
321 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE); |
322 | return 0; | |
323 | } | |
324 | } | |
325 | memcpy(out->md_data, in->md_data, out->digest->ctx_size); | |
326 | } | |
26188931 | 327 | |
0f113f3e | 328 | out->update = in->update; |
d4575825 | 329 | |
0f113f3e MC |
330 | if (in->pctx) { |
331 | out->pctx = EVP_PKEY_CTX_dup(in->pctx); | |
332 | if (!out->pctx) { | |
959ed531 | 333 | EVP_MD_CTX_reset(out); |
0f113f3e MC |
334 | return 0; |
335 | } | |
336 | } | |
18327cd0 | 337 | |
0f113f3e MC |
338 | if (out->digest->copy) |
339 | return out->digest->copy(out, in); | |
3a828611 | 340 | |
0f113f3e MC |
341 | return 1; |
342 | } | |
88ce56f8 | 343 | |
9e0aad9f | 344 | int EVP_Digest(const void *data, size_t count, |
0f113f3e MC |
345 | unsigned char *md, unsigned int *size, const EVP_MD *type, |
346 | ENGINE *impl) | |
347 | { | |
74cabf3f | 348 | EVP_MD_CTX *ctx = EVP_MD_CTX_create(); |
0f113f3e | 349 | int ret; |
dbad1690 | 350 | |
74cabf3f RL |
351 | if (ctx == NULL) |
352 | return 0; | |
353 | EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT); | |
354 | ret = EVP_DigestInit_ex(ctx, type, impl) | |
355 | && EVP_DigestUpdate(ctx, data, count) | |
356 | && EVP_DigestFinal_ex(ctx, md, size); | |
357 | EVP_MD_CTX_destroy(ctx); | |
dbad1690 | 358 | |
0f113f3e MC |
359 | return ret; |
360 | } | |
dbad1690 | 361 | |
396d5fd0 DSH |
362 | int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2) |
363 | { | |
364 | if (ctx->digest && ctx->digest->md_ctrl) { | |
365 | int ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2); | |
366 | if (ret <= 0) | |
367 | return 0; | |
368 | return 1; | |
369 | } | |
370 | return 0; | |
371 | } |