Bug Summary

File:src/lib/libcrypto/evp/evp_digest.c
Warning:line 162, column 9
Access to field 'init' results in a dereference of a null pointer (loaded from field 'digest')

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name evp_digest.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/lib/libcrypto/obj -resource-dir /usr/local/llvm16/lib/clang/16 -D LIBRESSL_INTERNAL -D HAVE_FUNOPEN -I /usr/src/lib/libcrypto -I /usr/src/lib/libcrypto/arch/amd64 -I /usr/src/lib/libcrypto/asn1 -I /usr/src/lib/libcrypto/bio -I /usr/src/lib/libcrypto/bn -I /usr/src/lib/libcrypto/bn/arch/amd64 -I /usr/src/lib/libcrypto/bytestring -I /usr/src/lib/libcrypto/curve25519 -I /usr/src/lib/libcrypto/dh -I /usr/src/lib/libcrypto/dsa -I /usr/src/lib/libcrypto/ec -I /usr/src/lib/libcrypto/ecdsa -I /usr/src/lib/libcrypto/evp -I /usr/src/lib/libcrypto/hidden -I /usr/src/lib/libcrypto/hmac -I /usr/src/lib/libcrypto/kdf -I /usr/src/lib/libcrypto/modes -I /usr/src/lib/libcrypto/ocsp -I /usr/src/lib/libcrypto/pkcs12 -I /usr/src/lib/libcrypto/rsa -I /usr/src/lib/libcrypto/sha -I /usr/src/lib/libcrypto/ts -I /usr/src/lib/libcrypto/x509 -I /usr/src/lib/libcrypto/obj -D AES_ASM -D BSAES_ASM -D VPAES_ASM -D OPENSSL_IA32_SSE2 -D RSA_ASM -D OPENSSL_BN_ASM_MONT -D OPENSSL_BN_ASM_MONT5 -D MD5_ASM -D GHASH_ASM -D RC4_MD5_ASM -D SHA1_ASM -D SHA256_ASM -D SHA512_ASM -D WHIRLPOOL_ASM -D OPENSSL_CPUID_OBJ -internal-isystem /usr/local/llvm16/lib/clang/16/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/lib/libcrypto/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fno-jump-tables -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/scan/2024-01-11-140451-98009-1 -x c /usr/src/lib/libcrypto/evp/evp_digest.c
1/* $OpenBSD: evp_digest.c,v 1.7 2023/12/29 07:22:47 tb 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_init(ctx);
127 return EVP_DigestInit_ex(ctx, type, NULL((void *)0));
128}
129
130int
131EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
132{
133 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED0x0002);
7
←
Calling 'EVP_MD_CTX_clear_flags'
→
8
←
Returning from 'EVP_MD_CTX_clear_flags'
→
134
135 if (ctx->digest != type) {
9
←
Assuming 'type' is equal to field 'digest'
→
10
←
Taking false branch
→
136 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data &&
137 !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE0x0004)) {
138 freezero(ctx->md_data, ctx->digest->ctx_size);
139 ctx->md_data = NULL((void *)0);
140 }
141 ctx->digest = type;
142 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT0x0100) && type->ctx_size) {
143 ctx->update = type->update;
144 ctx->md_data = calloc(1, type->ctx_size);
145 if (ctx->md_data == NULL((void *)0)) {
146 EVP_PKEY_CTX_free(ctx->pctx);
147 ctx->pctx = NULL((void *)0);
148 EVPerror(ERR_R_MALLOC_FAILURE)ERR_put_error(6,(0xfff),((1|64)),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,148);
149 return 0;
150 }
151 }
152 }
153 if (ctx->pctx
10.1
Field 'pctx' is null
) {
11
←
Taking false branch
→
154 int r;
155 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG((1<<3) | (1<<4) | (1<<5) | (1<<6) | (
1<<7)),
156 EVP_PKEY_CTRL_DIGESTINIT7, 0, ctx);
157 if (r <= 0 && (r != -2))
158 return 0;
159 }
160 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT0x0100)
12
←
Taking false branch
→
161 return 1;
162 return ctx->digest->init(ctx);
13
←
Access to field 'init' results in a dereference of a null pointer (loaded from field 'digest')
163}
164
165int
166EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
167{
168 return ctx->update(ctx, data, count);
169}
170
171/* The caller can assume that this removes any secret data from the context */
172int
173EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
174{
175 int ret;
176
177 ret = EVP_DigestFinal_ex(ctx, md, size);
178 EVP_MD_CTX_cleanup(ctx);
179 return ret;
180}
181
182/* The caller can assume that this removes any secret data from the context */
183int
184EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
185{
186 int ret;
187
188 if ((size_t)ctx->digest->md_size > EVP_MAX_MD_SIZE64) {
189 EVPerror(EVP_R_TOO_LARGE)ERR_put_error(6,(0xfff),(164),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,189);
190 return 0;
191 }
192 ret = ctx->digest->final(ctx, md);
193 if (size != NULL((void *)0))
194 *size = ctx->digest->md_size;
195 if (ctx->digest->cleanup) {
196 ctx->digest->cleanup(ctx);
197 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED0x0002);
198 }
199 memset(ctx->md_data, 0, ctx->digest->ctx_size);
200 return ret;
201}
202
203int
204EVP_Digest(const void *data, size_t count,
205 unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
206{
207 EVP_MD_CTX ctx;
208 int ret;
209
210 EVP_MD_CTX_init(&ctx);
1
Calling 'EVP_MD_CTX_init'
→
3
←
Returning from 'EVP_MD_CTX_init'
→
211 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_ONESHOT0x0001);
4
←
Calling 'EVP_MD_CTX_set_flags'
→
5
←
Returning from 'EVP_MD_CTX_set_flags'
→
212 ret = EVP_DigestInit_ex(&ctx, type, NULL((void *)0)) &&
6
←
Calling 'EVP_DigestInit_ex'
→
213 EVP_DigestUpdate(&ctx, data, count) &&
214 EVP_DigestFinal_ex(&ctx, md, size);
215 EVP_MD_CTX_cleanup(&ctx);
216
217 return ret;
218}
219
220EVP_MD_CTX *
221EVP_MD_CTX_new(void)
222{
223 return calloc(1, sizeof(EVP_MD_CTX));
224}
225
226void
227EVP_MD_CTX_free(EVP_MD_CTX *ctx)
228{
229 if (ctx == NULL((void *)0))
230 return;
231
232 EVP_MD_CTX_cleanup(ctx);
233
234 free(ctx);
235}
236
237EVP_MD_CTX *
238EVP_MD_CTX_create(void)
239{
240 return EVP_MD_CTX_new();
241}
242
243void
244EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
245{
246 EVP_MD_CTX_free(ctx);
247}
248
249void
250EVP_MD_CTX_init(EVP_MD_CTX *ctx)
251{
252 memset(ctx, 0, sizeof(*ctx));
2
←
Null pointer value stored to 'ctx.digest'
→
253}
254
255int
256EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
257{
258 return EVP_MD_CTX_cleanup(ctx);
259}
260
261/* This call frees resources associated with the context */
262int
263EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
264{
265 /*
266 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
267 * because sometimes only copies of the context are ever finalised.
268 */
269 if (ctx->digest && ctx->digest->cleanup &&
270 !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED0x0002))
271 ctx->digest->cleanup(ctx);
272 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data &&
273 !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE0x0004))
274 freezero(ctx->md_data, ctx->digest->ctx_size);
275 /*
276 * If EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set, EVP_MD_CTX_set_pkey() was
277 * called and its strange API contract implies we don't own ctx->pctx.
278 */
279 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX0x0400))
280 EVP_PKEY_CTX_free(ctx->pctx);
281 memset(ctx, 0, sizeof(*ctx));
282
283 return 1;
284}
285
286int
287EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
288{
289 EVP_MD_CTX_init(out);
290 return EVP_MD_CTX_copy_ex(out, in);
291}
292
293int
294EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
295{
296 unsigned char *tmp_buf;
297
298 if ((in == NULL((void *)0)) || (in->digest == NULL((void *)0))) {
299 EVPerror(EVP_R_INPUT_NOT_INITIALIZED)ERR_put_error(6,(0xfff),(111),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,299);
300 return 0;
301 }
302
303 if (out->digest == in->digest) {
304 tmp_buf = out->md_data;
305 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE0x0004);
306 } else
307 tmp_buf = NULL((void *)0);
308 EVP_MD_CTX_cleanup(out);
309 memcpy(out, in, sizeof *out);
310 out->md_data = NULL((void *)0);
311 out->pctx = NULL((void *)0);
312
313 /*
314 * Because of the EVP_PKEY_CTX_dup() below, EVP_MD_CTX_cleanup() needs
315 * to free out->pctx in all cases (even if this flag is set on in).
316 */
317 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX0x0400);
318
319 if (in->md_data && out->digest->ctx_size) {
320 if (tmp_buf) {
321 out->md_data = tmp_buf;
322 } else {
323 out->md_data = calloc(1, out->digest->ctx_size);
324 if (out->md_data == NULL((void *)0)) {
325 EVPerror(ERR_R_MALLOC_FAILURE)ERR_put_error(6,(0xfff),((1|64)),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,325);
326 return 0;
327 }
328 }
329 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
330 }
331
332 out->update = in->update;
333
334 if (in->pctx) {
335 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
336 if (!out->pctx) {
337 EVP_MD_CTX_cleanup(out);
338 return 0;
339 }
340 }
341
342 if (out->digest->copy)
343 return out->digest->copy(out, in);
344
345 return 1;
346}
347
348int
349EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
350{
351 int ret;
352
353 if (!ctx->digest) {
354 EVPerror(EVP_R_NO_CIPHER_SET)ERR_put_error(6,(0xfff),(131),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,354);
355 return 0;
356 }
357
358 if (!ctx->digest->md_ctrl) {
359 EVPerror(EVP_R_CTRL_NOT_IMPLEMENTED)ERR_put_error(6,(0xfff),(132),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,359);
360 return 0;
361 }
362
363 ret = ctx->digest->md_ctrl(ctx, type, arg, ptr);
364 if (ret == -1) {
365 EVPerror(EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED)ERR_put_error(6,(0xfff),(133),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,365);
366 return 0;
367 }
368 return ret;
369}
370
371const EVP_MD *
372EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
373{
374 if (!ctx)
375 return NULL((void *)0);
376 return ctx->digest;
377}
378
379void
380EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
381{
382 ctx->flags &= ~flags;
383}
384
385void
386EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
387{
388 ctx->flags |= flags;
389}
390
391int
392EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
393{
394 return (ctx->flags & flags);
395}
396
397void *
398EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
399{
400 return ctx->md_data;
401}
402
403EVP_PKEY_CTX *
404EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
405{
406 return ctx->pctx;
407}
408
409void
410EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
411{
412 if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX0x0400)) {
413 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX0x0400);
414 } else {
415 EVP_PKEY_CTX_free(ctx->pctx);
416 }
417
418 ctx->pctx = pctx;
419
420 if (pctx != NULL((void *)0)) {
421 /*
422 * For unclear reasons it was decided that the caller keeps
423 * ownership of pctx. So a flag was invented to make sure we
424 * don't free it in EVP_MD_CTX_cleanup(). We also need to
425 * unset it in EVP_MD_CTX_copy_ex(). Fortunately, the flag
426 * isn't public...
427 */
428 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX0x0400);
429 }
430}
431
432int
433EVP_MD_type(const EVP_MD *md)
434{
435 return md->type;
436}
437
438int
439EVP_MD_pkey_type(const EVP_MD *md)
440{
441 return md->pkey_type;
442}
443
444int
445EVP_MD_size(const EVP_MD *md)
446{
447 if (!md) {
448 EVPerror(EVP_R_MESSAGE_DIGEST_IS_NULL)ERR_put_error(6,(0xfff),(159),"/usr/src/lib/libcrypto/evp/evp_digest.c"
,448);
449 return -1;
450 }
451 return md->md_size;
452}
453
454unsigned long
455EVP_MD_flags(const EVP_MD *md)
456{
457 return md->flags;
458}
459
460int
461EVP_MD_block_size(const EVP_MD *md)
462{
463 return md->block_size;
464}
465
466/*
467 * XXX - remove everything below in the next bump.
468 */
469
470EVP_MD *
471EVP_MD_meth_new(int md_type, int pkey_type)
472{
473 EVP_MD *md;
474
475 if ((md = calloc(1, sizeof(*md))) == NULL((void *)0))
476 return NULL((void *)0);
477
478 md->type = md_type;
479 md->pkey_type = pkey_type;
480
481 return md;
482}
483
484EVP_MD *
485EVP_MD_meth_dup(const EVP_MD *md)
486{
487 EVP_MD *to;
488
489 if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) == NULL((void *)0))
490 return NULL((void *)0);
491
492 memcpy(to, md, sizeof(*to));
493
494 return to;
495}
496
497void
498EVP_MD_meth_free(EVP_MD *md)
499{
500 freezero(md, sizeof(*md));
501}
502
503int
504EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
505{
506 md->block_size = blocksize;
507 return 1;
508}
509
510int
511EVP_MD_meth_set_result_size(EVP_MD *md, int result_size)
512{
513 md->md_size = result_size;
514 return 1;
515}
516
517int
518EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
519{
520 md->ctx_size = datasize;
521 return 1;
522}
523
524int
525EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
526{
527 md->flags = flags;
528 return 1;
529}
530
531int
532EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
533{
534 md->init = init;
535 return 1;
536}
537
538int
539EVP_MD_meth_set_update(EVP_MD *md,
540 int (*update)(EVP_MD_CTX *ctx, const void *data, size_t count))
541{
542 md->update = update;
543 return 1;
544}
545
546int
547EVP_MD_meth_set_final(EVP_MD *md,
548 int (*final)(EVP_MD_CTX *ctx, unsigned char *md))
549{
550 md->final = final;
551 return 1;
552}
553
554int
555EVP_MD_meth_set_copy(EVP_MD *md,
556 int (*copy)(EVP_MD_CTX *to, const EVP_MD_CTX *from))
557{
558 md->copy = copy;
559 return 1;
560}
561
562int
563EVP_MD_meth_set_cleanup(EVP_MD *md,
564 int (*cleanup)(EVP_MD_CTX *ctx))
565{
566 md->cleanup = cleanup;
567 return 1;
568}
569
570int
571EVP_MD_meth_set_ctrl(EVP_MD *md,
572 int (*ctrl)(EVP_MD_CTX *ctx, int cmd, int p1, void *p2))
573{
574 md->md_ctrl = ctrl;
575 return 1;
576}