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