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diff --git a/src/lib/libcrypto/evp/evp_digest.c b/src/lib/libcrypto/evp/evp_digest.c
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1/* $OpenBSD: evp_digest.c,v 1.14 2024/04/10 15:00:38 beck Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 */
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 */
111
112#include <stdio.h>
113#include <string.h>
114
115#include <openssl/opensslconf.h>
116
117#include <openssl/err.h>
118#include <openssl/evp.h>
119#include <openssl/objects.h>
120
121#include "evp_local.h"
122
123int
124EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
125{
126 EVP_MD_CTX_legacy_clear(ctx);
127 return EVP_DigestInit_ex(ctx, type, NULL);
128}
129LCRYPTO_ALIAS(EVP_DigestInit);
130
131int
132EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
133{
134 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
135
136 if (ctx->digest != type) {
137 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data &&
138 !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
139 freezero(ctx->md_data, ctx->digest->ctx_size);
140 ctx->md_data = NULL;
141 }
142 ctx->digest = type;
143 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
144 ctx->update = type->update;
145 ctx->md_data = calloc(1, type->ctx_size);
146 if (ctx->md_data == NULL) {
147 EVP_PKEY_CTX_free(ctx->pctx);
148 ctx->pctx = NULL;
149 EVPerror(ERR_R_MALLOC_FAILURE);
150 return 0;
151 }
152 }
153 }
154 if (ctx->pctx) {
155 int r;
156 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
157 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
158 if (r <= 0 && (r != -2))
159 return 0;
160 }
161 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
162 return 1;
163 return ctx->digest->init(ctx);
164}
165LCRYPTO_ALIAS(EVP_DigestInit_ex);
166
167int
168EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
169{
170 return ctx->update(ctx, data, count);
171}
172LCRYPTO_ALIAS(EVP_DigestUpdate);
173
174/* The caller can assume that this removes any secret data from the context */
175int
176EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
177{
178 int ret;
179
180 ret = EVP_DigestFinal_ex(ctx, md, size);
181 EVP_MD_CTX_cleanup(ctx);
182 return ret;
183}
184LCRYPTO_ALIAS(EVP_DigestFinal);
185
186/* The caller can assume that this removes any secret data from the context */
187int
188EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
189{
190 int ret;
191
192 if ((size_t)ctx->digest->md_size > EVP_MAX_MD_SIZE) {
193 EVPerror(EVP_R_TOO_LARGE);
194 return 0;
195 }
196 ret = ctx->digest->final(ctx, md);
197 if (size != NULL)
198 *size = ctx->digest->md_size;
199 if (ctx->digest->cleanup) {
200 ctx->digest->cleanup(ctx);
201 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
202 }
203 memset(ctx->md_data, 0, ctx->digest->ctx_size);
204 return ret;
205}
206LCRYPTO_ALIAS(EVP_DigestFinal_ex);
207
208int
209EVP_Digest(const void *data, size_t count,
210 unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
211{
212 EVP_MD_CTX ctx;
213 int ret;
214
215 EVP_MD_CTX_legacy_clear(&ctx);
216 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_ONESHOT);
217 ret = EVP_DigestInit_ex(&ctx, type, NULL) &&
218 EVP_DigestUpdate(&ctx, data, count) &&
219 EVP_DigestFinal_ex(&ctx, md, size);
220 EVP_MD_CTX_cleanup(&ctx);
221
222 return ret;
223}
224LCRYPTO_ALIAS(EVP_Digest);
225
226EVP_MD_CTX *
227EVP_MD_CTX_new(void)
228{
229 return calloc(1, sizeof(EVP_MD_CTX));
230}
231LCRYPTO_ALIAS(EVP_MD_CTX_new);
232
233void
234EVP_MD_CTX_free(EVP_MD_CTX *ctx)
235{
236 if (ctx == NULL)
237 return;
238
239 EVP_MD_CTX_cleanup(ctx);
240
241 free(ctx);
242}
243LCRYPTO_ALIAS(EVP_MD_CTX_free);
244
245EVP_MD_CTX *
246EVP_MD_CTX_create(void)
247{
248 return EVP_MD_CTX_new();
249}
250LCRYPTO_ALIAS(EVP_MD_CTX_create);
251
252void
253EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
254{
255 EVP_MD_CTX_free(ctx);
256}
257LCRYPTO_ALIAS(EVP_MD_CTX_destroy);
258
259void
260EVP_MD_CTX_legacy_clear(EVP_MD_CTX *ctx)
261{
262 memset(ctx, 0, sizeof(*ctx));
263}
264
265int
266EVP_MD_CTX_init(EVP_MD_CTX *ctx)
267{
268 return EVP_MD_CTX_cleanup(ctx);
269}
270LCRYPTO_ALIAS(EVP_MD_CTX_init);
271
272int
273EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
274{
275 return EVP_MD_CTX_cleanup(ctx);
276}
277LCRYPTO_ALIAS(EVP_MD_CTX_reset);
278
279int
280EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
281{
282 if (ctx == NULL)
283 return 1;
284
285 /*
286 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
287 * because sometimes only copies of the context are ever finalised.
288 */
289 if (ctx->digest && ctx->digest->cleanup &&
290 !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
291 ctx->digest->cleanup(ctx);
292 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data &&
293 !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))
294 freezero(ctx->md_data, ctx->digest->ctx_size);
295 /*
296 * If EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set, EVP_MD_CTX_set_pkey() was
297 * called and its strange API contract implies we don't own ctx->pctx.
298 */
299 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
300 EVP_PKEY_CTX_free(ctx->pctx);
301 memset(ctx, 0, sizeof(*ctx));
302
303 return 1;
304}
305LCRYPTO_ALIAS(EVP_MD_CTX_cleanup);
306
307int
308EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
309{
310 EVP_MD_CTX_legacy_clear(out);
311 return EVP_MD_CTX_copy_ex(out, in);
312}
313LCRYPTO_ALIAS(EVP_MD_CTX_copy);
314
315int
316EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
317{
318 unsigned char *tmp_buf;
319
320 if ((in == NULL) || (in->digest == NULL)) {
321 EVPerror(EVP_R_INPUT_NOT_INITIALIZED);
322 return 0;
323 }
324
325 if (out->digest == in->digest) {
326 tmp_buf = out->md_data;
327 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
328 } else
329 tmp_buf = NULL;
330 EVP_MD_CTX_cleanup(out);
331 memcpy(out, in, sizeof *out);
332 out->md_data = NULL;
333 out->pctx = NULL;
334
335 /*
336 * Because of the EVP_PKEY_CTX_dup() below, EVP_MD_CTX_cleanup() needs
337 * to free out->pctx in all cases (even if this flag is set on in).
338 */
339 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
340
341 if (in->md_data && out->digest->ctx_size) {
342 if (tmp_buf) {
343 out->md_data = tmp_buf;
344 } else {
345 out->md_data = calloc(1, out->digest->ctx_size);
346 if (out->md_data == NULL) {
347 EVPerror(ERR_R_MALLOC_FAILURE);
348 return 0;
349 }
350 }
351 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
352 }
353
354 out->update = in->update;
355
356 if (in->pctx) {
357 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
358 if (!out->pctx) {
359 EVP_MD_CTX_cleanup(out);
360 return 0;
361 }
362 }
363
364 if (out->digest->copy)
365 return out->digest->copy(out, in);
366
367 return 1;
368}
369LCRYPTO_ALIAS(EVP_MD_CTX_copy_ex);
370
371int
372EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
373{
374 int ret;
375
376 if (!ctx->digest) {
377 EVPerror(EVP_R_NO_CIPHER_SET);
378 return 0;
379 }
380
381 if (!ctx->digest->md_ctrl) {
382 EVPerror(EVP_R_CTRL_NOT_IMPLEMENTED);
383 return 0;
384 }
385
386 ret = ctx->digest->md_ctrl(ctx, type, arg, ptr);
387 if (ret == -1) {
388 EVPerror(EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
389 return 0;
390 }
391 return ret;
392}
393LCRYPTO_ALIAS(EVP_MD_CTX_ctrl);
394
395const EVP_MD *
396EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
397{
398 if (!ctx)
399 return NULL;
400 return ctx->digest;
401}
402LCRYPTO_ALIAS(EVP_MD_CTX_md);
403
404void
405EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
406{
407 ctx->flags &= ~flags;
408}
409LCRYPTO_ALIAS(EVP_MD_CTX_clear_flags);
410
411void
412EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
413{
414 ctx->flags |= flags;
415}
416LCRYPTO_ALIAS(EVP_MD_CTX_set_flags);
417
418int
419EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
420{
421 return (ctx->flags & flags);
422}
423LCRYPTO_ALIAS(EVP_MD_CTX_test_flags);
424
425void *
426EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
427{
428 return ctx->md_data;
429}
430LCRYPTO_ALIAS(EVP_MD_CTX_md_data);
431
432EVP_PKEY_CTX *
433EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
434{
435 return ctx->pctx;
436}
437LCRYPTO_ALIAS(EVP_MD_CTX_pkey_ctx);
438
439void
440EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
441{
442 if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) {
443 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
444 } else {
445 EVP_PKEY_CTX_free(ctx->pctx);
446 }
447
448 ctx->pctx = pctx;
449
450 if (pctx != NULL) {
451 /*
452 * For unclear reasons it was decided that the caller keeps
453 * ownership of pctx. So a flag was invented to make sure we
454 * don't free it in EVP_MD_CTX_cleanup(). We also need to
455 * unset it in EVP_MD_CTX_copy_ex(). Fortunately, the flag
456 * isn't public...
457 */
458 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
459 }
460}
461LCRYPTO_ALIAS(EVP_MD_CTX_set_pkey_ctx);
462
463int
464EVP_MD_type(const EVP_MD *md)
465{
466 return md->type;
467}
468LCRYPTO_ALIAS(EVP_MD_type);
469
470int
471EVP_MD_pkey_type(const EVP_MD *md)
472{
473 return md->pkey_type;
474}
475LCRYPTO_ALIAS(EVP_MD_pkey_type);
476
477int
478EVP_MD_size(const EVP_MD *md)
479{
480 if (!md) {
481 EVPerror(EVP_R_MESSAGE_DIGEST_IS_NULL);
482 return -1;
483 }
484 return md->md_size;
485}
486LCRYPTO_ALIAS(EVP_MD_size);
487
488unsigned long
489EVP_MD_flags(const EVP_MD *md)
490{
491 return md->flags;
492}
493LCRYPTO_ALIAS(EVP_MD_flags);
494
495int
496EVP_MD_block_size(const EVP_MD *md)
497{
498 return md->block_size;
499}
500LCRYPTO_ALIAS(EVP_MD_block_size);
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