]>
Commit | Line | Data |
---|---|---|
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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
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 :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
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. | |
52 | * | |
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 | |
66 | * notice, this list of conditions and the following disclaimer. | |
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> | |
113 | #include "cryptlib.h" | |
ec577822 BM |
114 | #include <openssl/objects.h> |
115 | #include <openssl/evp.h> | |
0b13e9f0 | 116 | #ifndef OPENSSL_NO_ENGINE |
11a57c7b | 117 | #include <openssl/engine.h> |
0b13e9f0 | 118 | #endif |
d02b48c6 | 119 | |
dbad1690 BL |
120 | void EVP_MD_CTX_init(EVP_MD_CTX *ctx) |
121 | { | |
122 | memset(ctx,'\0',sizeof *ctx); | |
123 | } | |
124 | ||
125 | EVP_MD_CTX *EVP_MD_CTX_create(void) | |
126 | { | |
127 | EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx); | |
128 | ||
fdb2c6e4 DSH |
129 | if (ctx) |
130 | EVP_MD_CTX_init(ctx); | |
dbad1690 BL |
131 | |
132 | return ctx; | |
133 | } | |
134 | ||
2dc769a1 | 135 | int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) |
d02b48c6 | 136 | { |
20d2186c | 137 | EVP_MD_CTX_init(ctx); |
11a57c7b GT |
138 | return EVP_DigestInit_ex(ctx, type, NULL); |
139 | } | |
0fea7ed4 | 140 | |
11a57c7b GT |
141 | int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) |
142 | { | |
0fea7ed4 | 143 | EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED); |
0b13e9f0 | 144 | #ifndef OPENSSL_NO_ENGINE |
11a57c7b GT |
145 | /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts |
146 | * so this context may already have an ENGINE! Try to avoid releasing | |
147 | * the previous handle, re-querying for an ENGINE, and having a | |
148 | * reinitialisation, when it may all be unecessary. */ | |
149 | if (ctx->engine && ctx->digest && (!type || | |
150 | (type && (type->type == ctx->digest->type)))) | |
151 | goto skip_to_init; | |
152 | if (type) | |
153 | { | |
154 | /* Ensure an ENGINE left lying around from last time is cleared | |
155 | * (the previous check attempted to avoid this if the same | |
156 | * ENGINE and EVP_MD could be used). */ | |
157 | if(ctx->engine) | |
158 | ENGINE_finish(ctx->engine); | |
bf6a9e66 DSH |
159 | if(impl) |
160 | { | |
161 | if (!ENGINE_init(impl)) | |
162 | { | |
8afca8d9 | 163 | EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR); |
bf6a9e66 DSH |
164 | return 0; |
165 | } | |
166 | } | |
167 | else | |
11a57c7b GT |
168 | /* Ask if an ENGINE is reserved for this job */ |
169 | impl = ENGINE_get_digest_engine(type->type); | |
170 | if(impl) | |
171 | { | |
172 | /* There's an ENGINE for this job ... (apparently) */ | |
173 | const EVP_MD *d = ENGINE_get_digest(impl, type->type); | |
174 | if(!d) | |
175 | { | |
176 | /* Same comment from evp_enc.c */ | |
8afca8d9 | 177 | EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR); |
8c4ce7ba | 178 | ENGINE_finish(impl); |
11a57c7b GT |
179 | return 0; |
180 | } | |
181 | /* We'll use the ENGINE's private digest definition */ | |
182 | type = d; | |
183 | /* Store the ENGINE functional reference so we know | |
184 | * 'type' came from an ENGINE and we need to release | |
185 | * it when done. */ | |
186 | ctx->engine = impl; | |
187 | } | |
188 | else | |
189 | ctx->engine = NULL; | |
190 | } | |
0b13e9f0 | 191 | else |
0b13e9f0 | 192 | if(!ctx->digest) |
11a57c7b | 193 | { |
8afca8d9 | 194 | EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_NO_DIGEST_SET); |
11a57c7b GT |
195 | return 0; |
196 | } | |
90e8a310 | 197 | #endif |
5ba372b1 | 198 | if (ctx->digest != type) |
dbad1690 | 199 | { |
5ba372b1 | 200 | if (ctx->digest && ctx->digest->ctx_size) |
e19ea557 | 201 | OPENSSL_free(ctx->md_data); |
dbad1690 | 202 | ctx->digest=type; |
74633553 DSH |
203 | if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) |
204 | { | |
205 | ctx->update = type->update; | |
26188931 | 206 | ctx->md_data=OPENSSL_malloc(type->ctx_size); |
338a61b9 DSH |
207 | if (ctx->md_data == NULL) |
208 | { | |
209 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, | |
210 | ERR_R_MALLOC_FAILURE); | |
211 | return 0; | |
212 | } | |
74633553 | 213 | } |
5a853853 | 214 | } |
0b13e9f0 | 215 | #ifndef OPENSSL_NO_ENGINE |
11a57c7b | 216 | skip_to_init: |
0b13e9f0 | 217 | #endif |
74633553 DSH |
218 | if (ctx->pctx) |
219 | { | |
220 | int r; | |
221 | r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, | |
222 | EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); | |
223 | if (r <= 0 && (r != -2)) | |
224 | return 0; | |
225 | } | |
226 | if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) | |
227 | return 1; | |
f1c2a9de | 228 | return ctx->digest->init(ctx); |
d02b48c6 RE |
229 | } |
230 | ||
f80921b6 | 231 | int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count) |
d02b48c6 | 232 | { |
74633553 | 233 | return ctx->update(ctx,data,count); |
d02b48c6 RE |
234 | } |
235 | ||
dbad1690 | 236 | /* The caller can assume that this removes any secret data from the context */ |
2dc769a1 | 237 | int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) |
20d2186c DSH |
238 | { |
239 | int ret; | |
240 | ret = EVP_DigestFinal_ex(ctx, md, size); | |
241 | EVP_MD_CTX_cleanup(ctx); | |
242 | return ret; | |
243 | } | |
244 | ||
245 | /* The caller can assume that this removes any secret data from the context */ | |
246 | int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) | |
d02b48c6 | 247 | { |
2dc769a1 | 248 | int ret; |
54a656ef BL |
249 | |
250 | OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE); | |
26188931 | 251 | ret=ctx->digest->final(ctx,md); |
d02b48c6 RE |
252 | if (size != NULL) |
253 | *size=ctx->digest->md_size; | |
0fea7ed4 BL |
254 | if (ctx->digest->cleanup) |
255 | { | |
256 | ctx->digest->cleanup(ctx); | |
257 | EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED); | |
258 | } | |
dbad1690 | 259 | memset(ctx->md_data,0,ctx->digest->ctx_size); |
2dc769a1 | 260 | return ret; |
d02b48c6 | 261 | } |
351d8998 | 262 | |
dbad1690 | 263 | int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
20d2186c DSH |
264 | { |
265 | EVP_MD_CTX_init(out); | |
266 | return EVP_MD_CTX_copy_ex(out, in); | |
267 | } | |
268 | ||
269 | int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) | |
26188931 | 270 | { |
d4575825 | 271 | unsigned char *tmp_buf; |
5ba372b1 BM |
272 | if ((in == NULL) || (in->digest == NULL)) |
273 | { | |
8afca8d9 | 274 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,EVP_R_INPUT_NOT_INITIALIZED); |
5ba372b1 BM |
275 | return 0; |
276 | } | |
0b13e9f0 | 277 | #ifndef OPENSSL_NO_ENGINE |
11a57c7b GT |
278 | /* Make sure it's safe to copy a digest context using an ENGINE */ |
279 | if (in->engine && !ENGINE_init(in->engine)) | |
280 | { | |
8afca8d9 | 281 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_ENGINE_LIB); |
11a57c7b GT |
282 | return 0; |
283 | } | |
0b13e9f0 | 284 | #endif |
26188931 | 285 | |
d4575825 DSH |
286 | if (out->digest == in->digest) |
287 | { | |
288 | tmp_buf = out->md_data; | |
289 | EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE); | |
290 | } | |
291 | else tmp_buf = NULL; | |
5ba372b1 BM |
292 | EVP_MD_CTX_cleanup(out); |
293 | memcpy(out,in,sizeof *out); | |
26188931 | 294 | |
74633553 | 295 | if (in->md_data && out->digest->ctx_size) |
5ba372b1 | 296 | { |
fdb2c6e4 DSH |
297 | if (tmp_buf) |
298 | out->md_data = tmp_buf; | |
299 | else | |
300 | { | |
301 | out->md_data=OPENSSL_malloc(out->digest->ctx_size); | |
302 | if (!out->md_data) | |
303 | { | |
304 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_MALLOC_FAILURE); | |
305 | return 0; | |
306 | } | |
307 | } | |
5ba372b1 BM |
308 | memcpy(out->md_data,in->md_data,out->digest->ctx_size); |
309 | } | |
d4575825 | 310 | |
18327cd0 DSH |
311 | out->update = in->update; |
312 | ||
3a828611 DSH |
313 | if (in->pctx) |
314 | { | |
315 | out->pctx = EVP_PKEY_CTX_dup(in->pctx); | |
316 | if (!out->pctx) | |
317 | { | |
318 | EVP_MD_CTX_cleanup(out); | |
319 | return 0; | |
320 | } | |
321 | } | |
322 | ||
5ba372b1 BM |
323 | if (out->digest->copy) |
324 | return out->digest->copy(out,in); | |
325 | ||
326 | return 1; | |
327 | } | |
88ce56f8 | 328 | |
9e0aad9f | 329 | int EVP_Digest(const void *data, size_t count, |
20d2186c | 330 | unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl) |
5ba372b1 | 331 | { |
88ce56f8 | 332 | EVP_MD_CTX ctx; |
dbad1690 BL |
333 | int ret; |
334 | ||
335 | EVP_MD_CTX_init(&ctx); | |
26188931 | 336 | EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT); |
20d2186c | 337 | ret=EVP_DigestInit_ex(&ctx, type, impl) |
dbad1690 | 338 | && EVP_DigestUpdate(&ctx, data, count) |
20d2186c | 339 | && EVP_DigestFinal_ex(&ctx, md, size); |
dbad1690 BL |
340 | EVP_MD_CTX_cleanup(&ctx); |
341 | ||
342 | return ret; | |
5ba372b1 | 343 | } |
dbad1690 BL |
344 | |
345 | void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) | |
346 | { | |
347 | EVP_MD_CTX_cleanup(ctx); | |
348 | OPENSSL_free(ctx); | |
349 | } | |
350 | ||
351 | /* This call frees resources associated with the context */ | |
352 | int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) | |
353 | { | |
1f3b6580 BL |
354 | /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final, |
355 | * because sometimes only copies of the context are ever finalised. | |
356 | */ | |
0fea7ed4 | 357 | if (ctx->digest && ctx->digest->cleanup |
9dd5ae65 | 358 | && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED)) |
e8330cf5 | 359 | ctx->digest->cleanup(ctx); |
d4575825 DSH |
360 | if (ctx->digest && ctx->digest->ctx_size && ctx->md_data |
361 | && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) | |
e19ea557 | 362 | { |
4579924b | 363 | OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size); |
e19ea557 GT |
364 | OPENSSL_free(ctx->md_data); |
365 | } | |
b7683e3a DSH |
366 | if (ctx->pctx) |
367 | EVP_PKEY_CTX_free(ctx->pctx); | |
0b13e9f0 | 368 | #ifndef OPENSSL_NO_ENGINE |
11a57c7b GT |
369 | if(ctx->engine) |
370 | /* The EVP_MD we used belongs to an ENGINE, release the | |
371 | * functional reference we held for this reason. */ | |
372 | ENGINE_finish(ctx->engine); | |
0b13e9f0 | 373 | #endif |
dbad1690 BL |
374 | memset(ctx,'\0',sizeof *ctx); |
375 | ||
376 | return 1; | |
377 | } |