/src/openssl/crypto/evp/digest.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. |
3 | | * |
4 | | * Licensed under the Apache License 2.0 (the "License"). You may not use |
5 | | * this file except in compliance with the License. You can obtain a copy |
6 | | * in the file LICENSE in the source distribution or at |
7 | | * https://www.openssl.org/source/license.html |
8 | | */ |
9 | | |
10 | | #include <stdio.h> |
11 | | #include <openssl/objects.h> |
12 | | #include <openssl/evp.h> |
13 | | #include <openssl/engine.h> |
14 | | #include <openssl/params.h> |
15 | | #include <openssl/core_names.h> |
16 | | #include "internal/cryptlib.h" |
17 | | #include "crypto/evp.h" |
18 | | #include "internal/provider.h" |
19 | | #include "evp_local.h" |
20 | | |
21 | | /* This call frees resources associated with the context */ |
22 | | int EVP_MD_CTX_reset(EVP_MD_CTX *ctx) |
23 | 0 | { |
24 | 0 | if (ctx == NULL) |
25 | 0 | return 1; |
26 | | |
27 | 0 | #ifndef FIPS_MODE |
28 | | /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */ |
29 | | /* |
30 | | * pctx should be freed by the user of EVP_MD_CTX |
31 | | * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set |
32 | | */ |
33 | 0 | if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) |
34 | 0 | EVP_PKEY_CTX_free(ctx->pctx); |
35 | 0 | #endif |
36 | |
|
37 | 0 | EVP_MD_free(ctx->fetched_digest); |
38 | 0 | ctx->fetched_digest = NULL; |
39 | 0 | ctx->reqdigest = NULL; |
40 | |
|
41 | 0 | if (ctx->provctx != NULL) { |
42 | 0 | if (ctx->digest->freectx != NULL) |
43 | 0 | ctx->digest->freectx(ctx->provctx); |
44 | 0 | ctx->provctx = NULL; |
45 | 0 | EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
46 | 0 | } |
47 | | |
48 | | /* TODO(3.0): Remove legacy code below */ |
49 | | |
50 | | /* |
51 | | * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because |
52 | | * sometimes only copies of the context are ever finalised. |
53 | | */ |
54 | 0 | if (ctx->digest && ctx->digest->cleanup |
55 | 0 | && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED)) |
56 | 0 | ctx->digest->cleanup(ctx); |
57 | 0 | if (ctx->digest && ctx->digest->ctx_size && ctx->md_data |
58 | 0 | && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) { |
59 | 0 | OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size); |
60 | 0 | } |
61 | |
|
62 | 0 | #if !defined(FIPS_MODE) && !defined(OPENSSL_NO_ENGINE) |
63 | 0 | ENGINE_finish(ctx->engine); |
64 | 0 | #endif |
65 | | |
66 | | /* TODO(3.0): End of legacy code */ |
67 | |
|
68 | 0 | OPENSSL_cleanse(ctx, sizeof(*ctx)); |
69 | |
|
70 | 0 | return 1; |
71 | 0 | } |
72 | | |
73 | | EVP_MD_CTX *EVP_MD_CTX_new(void) |
74 | 0 | { |
75 | 0 | return OPENSSL_zalloc(sizeof(EVP_MD_CTX)); |
76 | 0 | } |
77 | | |
78 | | void EVP_MD_CTX_free(EVP_MD_CTX *ctx) |
79 | 0 | { |
80 | 0 | if (ctx == NULL) |
81 | 0 | return; |
82 | | |
83 | 0 | EVP_MD_CTX_reset(ctx); |
84 | |
|
85 | 0 | OPENSSL_free(ctx); |
86 | 0 | return; |
87 | 0 | } |
88 | | |
89 | | int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) |
90 | 0 | { |
91 | 0 | EVP_MD_CTX_reset(ctx); |
92 | 0 | return EVP_DigestInit_ex(ctx, type, NULL); |
93 | 0 | } |
94 | | |
95 | | int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) |
96 | 0 | { |
97 | 0 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
98 | 0 | ENGINE *tmpimpl = NULL; |
99 | 0 | #endif |
100 | |
|
101 | 0 | EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
102 | |
|
103 | 0 | if (ctx->provctx != NULL) { |
104 | 0 | if (!ossl_assert(ctx->digest != NULL)) { |
105 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
106 | 0 | return 0; |
107 | 0 | } |
108 | 0 | if (ctx->digest->freectx != NULL) |
109 | 0 | ctx->digest->freectx(ctx->provctx); |
110 | 0 | ctx->provctx = NULL; |
111 | 0 | } |
112 | | |
113 | 0 | if (type != NULL) |
114 | 0 | ctx->reqdigest = type; |
115 | | |
116 | | /* TODO(3.0): Legacy work around code below. Remove this */ |
117 | 0 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
118 | | /* |
119 | | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so |
120 | | * this context may already have an ENGINE! Try to avoid releasing the |
121 | | * previous handle, re-querying for an ENGINE, and having a |
122 | | * reinitialisation, when it may all be unnecessary. |
123 | | */ |
124 | 0 | if (ctx->engine && ctx->digest && |
125 | 0 | (type == NULL || (type->type == ctx->digest->type))) |
126 | 0 | goto skip_to_init; |
127 | | |
128 | 0 | if (type != NULL) { |
129 | | /* |
130 | | * Ensure an ENGINE left lying around from last time is cleared (the |
131 | | * previous check attempted to avoid this if the same ENGINE and |
132 | | * EVP_MD could be used). |
133 | | */ |
134 | 0 | ENGINE_finish(ctx->engine); |
135 | 0 | ctx->engine = NULL; |
136 | 0 | } |
137 | |
|
138 | 0 | if (type != NULL && impl == NULL) |
139 | 0 | tmpimpl = ENGINE_get_digest_engine(type->type); |
140 | 0 | #endif |
141 | | |
142 | | /* |
143 | | * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we |
144 | | * should use legacy handling for now. |
145 | | */ |
146 | 0 | if (ctx->engine != NULL |
147 | 0 | || impl != NULL |
148 | 0 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
149 | 0 | || tmpimpl != NULL |
150 | 0 | #endif |
151 | 0 | || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) { |
152 | 0 | if (ctx->digest == ctx->fetched_digest) |
153 | 0 | ctx->digest = NULL; |
154 | 0 | EVP_MD_free(ctx->fetched_digest); |
155 | 0 | ctx->fetched_digest = NULL; |
156 | 0 | goto legacy; |
157 | 0 | } |
158 | | |
159 | 0 | if (ctx->digest != NULL && ctx->digest->ctx_size > 0) { |
160 | 0 | OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size); |
161 | 0 | ctx->md_data = NULL; |
162 | 0 | } |
163 | | |
164 | | /* TODO(3.0): Start of non-legacy code below */ |
165 | |
|
166 | 0 | if (type->prov == NULL) { |
167 | | #ifdef FIPS_MODE |
168 | | /* We only do explicit fetches inside the FIPS module */ |
169 | | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
170 | | return 0; |
171 | | #else |
172 | 0 | EVP_MD *provmd = EVP_MD_fetch(NULL, OBJ_nid2sn(type->type), ""); |
173 | |
|
174 | 0 | if (provmd == NULL) { |
175 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
176 | 0 | return 0; |
177 | 0 | } |
178 | 0 | type = provmd; |
179 | 0 | EVP_MD_free(ctx->fetched_digest); |
180 | 0 | ctx->fetched_digest = provmd; |
181 | 0 | #endif |
182 | 0 | } |
183 | | |
184 | 0 | if (ctx->provctx != NULL && ctx->digest != NULL && ctx->digest != type) { |
185 | 0 | if (ctx->digest->freectx != NULL) |
186 | 0 | ctx->digest->freectx(ctx->provctx); |
187 | 0 | ctx->provctx = NULL; |
188 | 0 | } |
189 | 0 | ctx->digest = type; |
190 | 0 | if (ctx->provctx == NULL) { |
191 | 0 | ctx->provctx = ctx->digest->newctx(ossl_provider_ctx(type->prov)); |
192 | 0 | if (ctx->provctx == NULL) { |
193 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
194 | 0 | return 0; |
195 | 0 | } |
196 | 0 | } |
197 | | |
198 | 0 | if (ctx->digest->dinit == NULL) { |
199 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
200 | 0 | return 0; |
201 | 0 | } |
202 | | |
203 | 0 | return ctx->digest->dinit(ctx->provctx); |
204 | | |
205 | | /* TODO(3.0): Remove legacy code below */ |
206 | 0 | legacy: |
207 | |
|
208 | 0 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
209 | 0 | if (type) { |
210 | 0 | if (impl != NULL) { |
211 | 0 | if (!ENGINE_init(impl)) { |
212 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
213 | 0 | return 0; |
214 | 0 | } |
215 | 0 | } else { |
216 | | /* Ask if an ENGINE is reserved for this job */ |
217 | 0 | impl = tmpimpl; |
218 | 0 | } |
219 | 0 | if (impl != NULL) { |
220 | | /* There's an ENGINE for this job ... (apparently) */ |
221 | 0 | const EVP_MD *d = ENGINE_get_digest(impl, type->type); |
222 | |
|
223 | 0 | if (d == NULL) { |
224 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); |
225 | 0 | ENGINE_finish(impl); |
226 | 0 | return 0; |
227 | 0 | } |
228 | | /* We'll use the ENGINE's private digest definition */ |
229 | 0 | type = d; |
230 | | /* |
231 | | * Store the ENGINE functional reference so we know 'type' came |
232 | | * from an ENGINE and we need to release it when done. |
233 | | */ |
234 | 0 | ctx->engine = impl; |
235 | 0 | } else |
236 | 0 | ctx->engine = NULL; |
237 | 0 | } else { |
238 | 0 | if (!ctx->digest) { |
239 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET); |
240 | 0 | return 0; |
241 | 0 | } |
242 | 0 | type = ctx->digest; |
243 | 0 | } |
244 | 0 | #endif |
245 | 0 | if (ctx->digest != type) { |
246 | 0 | if (ctx->digest && ctx->digest->ctx_size) { |
247 | 0 | OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size); |
248 | 0 | ctx->md_data = NULL; |
249 | 0 | } |
250 | 0 | ctx->digest = type; |
251 | 0 | if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) { |
252 | 0 | ctx->update = type->update; |
253 | 0 | ctx->md_data = OPENSSL_zalloc(type->ctx_size); |
254 | 0 | if (ctx->md_data == NULL) { |
255 | 0 | EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE); |
256 | 0 | return 0; |
257 | 0 | } |
258 | 0 | } |
259 | 0 | } |
260 | 0 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
261 | 0 | skip_to_init: |
262 | 0 | #endif |
263 | 0 | #ifndef FIPS_MODE |
264 | | /* |
265 | | * TODO(3.0): Temporarily no support for EVP_DigestSign* inside FIPS module |
266 | | * or when using providers. |
267 | | */ |
268 | 0 | if (ctx->pctx != NULL |
269 | 0 | && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx) |
270 | 0 | || ctx->pctx->op.sig.signature == NULL)) { |
271 | 0 | int r; |
272 | 0 | r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, |
273 | 0 | EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); |
274 | 0 | if (r <= 0 && (r != -2)) |
275 | 0 | return 0; |
276 | 0 | } |
277 | 0 | #endif |
278 | 0 | if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) |
279 | 0 | return 1; |
280 | 0 | return ctx->digest->init(ctx); |
281 | 0 | } |
282 | | |
283 | | int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count) |
284 | 0 | { |
285 | 0 | if (count == 0) |
286 | 0 | return 1; |
287 | | |
288 | 0 | if (ctx->pctx != NULL |
289 | 0 | && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx) |
290 | 0 | && ctx->pctx->op.sig.sigprovctx != NULL) { |
291 | | /* |
292 | | * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and |
293 | | * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate(). |
294 | | * Some code calls EVP_DigestUpdate() directly even when initialised |
295 | | * with EVP_DigestSignInit_ex() or EVP_DigestVerifyInit_ex(), so we |
296 | | * detect that and redirect to the correct EVP_Digest*Update() function |
297 | | */ |
298 | 0 | if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX) |
299 | 0 | return EVP_DigestSignUpdate(ctx, data, count); |
300 | 0 | if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX) |
301 | 0 | return EVP_DigestVerifyUpdate(ctx, data, count); |
302 | 0 | EVPerr(EVP_F_EVP_DIGESTUPDATE, EVP_R_UPDATE_ERROR); |
303 | 0 | return 0; |
304 | 0 | } |
305 | | |
306 | 0 | if (ctx->digest == NULL |
307 | 0 | || ctx->digest->prov == NULL |
308 | 0 | || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) |
309 | 0 | goto legacy; |
310 | | |
311 | 0 | if (ctx->digest->dupdate == NULL) { |
312 | 0 | EVPerr(EVP_F_EVP_DIGESTUPDATE, EVP_R_UPDATE_ERROR); |
313 | 0 | return 0; |
314 | 0 | } |
315 | 0 | return ctx->digest->dupdate(ctx->provctx, data, count); |
316 | | |
317 | | /* TODO(3.0): Remove legacy code below */ |
318 | 0 | legacy: |
319 | 0 | return ctx->update(ctx, data, count); |
320 | 0 | } |
321 | | |
322 | | /* The caller can assume that this removes any secret data from the context */ |
323 | | int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) |
324 | 0 | { |
325 | 0 | int ret; |
326 | 0 | ret = EVP_DigestFinal_ex(ctx, md, size); |
327 | 0 | EVP_MD_CTX_reset(ctx); |
328 | 0 | return ret; |
329 | 0 | } |
330 | | |
331 | | /* The caller can assume that this removes any secret data from the context */ |
332 | | int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize) |
333 | 0 | { |
334 | 0 | int ret; |
335 | 0 | size_t size = 0; |
336 | 0 | size_t mdsize = EVP_MD_size(ctx->digest); |
337 | |
|
338 | 0 | if (ctx->digest == NULL || ctx->digest->prov == NULL) |
339 | 0 | goto legacy; |
340 | | |
341 | 0 | if (ctx->digest->dfinal == NULL) { |
342 | 0 | EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR); |
343 | 0 | return 0; |
344 | 0 | } |
345 | | |
346 | 0 | ret = ctx->digest->dfinal(ctx->provctx, md, &size, mdsize); |
347 | |
|
348 | 0 | if (isize != NULL) { |
349 | 0 | if (size <= UINT_MAX) { |
350 | 0 | *isize = (int)size; |
351 | 0 | } else { |
352 | 0 | EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR); |
353 | 0 | ret = 0; |
354 | 0 | } |
355 | 0 | } |
356 | |
|
357 | 0 | return ret; |
358 | | |
359 | | /* TODO(3.0): Remove legacy code below */ |
360 | 0 | legacy: |
361 | 0 | OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE); |
362 | 0 | ret = ctx->digest->final(ctx, md); |
363 | 0 | if (isize != NULL) |
364 | 0 | *isize = mdsize; |
365 | 0 | if (ctx->digest->cleanup) { |
366 | 0 | ctx->digest->cleanup(ctx); |
367 | 0 | EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
368 | 0 | } |
369 | 0 | OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); |
370 | 0 | return ret; |
371 | 0 | } |
372 | | |
373 | | int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size) |
374 | 0 | { |
375 | 0 | int ret = 0; |
376 | 0 | OSSL_PARAM params[2]; |
377 | 0 | size_t i = 0; |
378 | |
|
379 | 0 | if (ctx->digest == NULL || ctx->digest->prov == NULL) |
380 | 0 | goto legacy; |
381 | | |
382 | 0 | if (ctx->digest->dfinal == NULL) { |
383 | 0 | EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_FINAL_ERROR); |
384 | 0 | return 0; |
385 | 0 | } |
386 | | |
387 | 0 | params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size); |
388 | 0 | params[i++] = OSSL_PARAM_construct_end(); |
389 | |
|
390 | 0 | if (EVP_MD_CTX_set_params(ctx, params) > 0) |
391 | 0 | ret = ctx->digest->dfinal(ctx->provctx, md, &size, size); |
392 | 0 | EVP_MD_CTX_reset(ctx); |
393 | 0 | return ret; |
394 | | |
395 | 0 | legacy: |
396 | 0 | if (ctx->digest->flags & EVP_MD_FLAG_XOF |
397 | 0 | && size <= INT_MAX |
398 | 0 | && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) { |
399 | 0 | ret = ctx->digest->final(ctx, md); |
400 | 0 | if (ctx->digest->cleanup != NULL) { |
401 | 0 | ctx->digest->cleanup(ctx); |
402 | 0 | EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
403 | 0 | } |
404 | 0 | OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); |
405 | 0 | } else { |
406 | 0 | EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH); |
407 | 0 | } |
408 | |
|
409 | 0 | return ret; |
410 | 0 | } |
411 | | |
412 | | int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
413 | 0 | { |
414 | 0 | EVP_MD_CTX_reset(out); |
415 | 0 | return EVP_MD_CTX_copy_ex(out, in); |
416 | 0 | } |
417 | | |
418 | | int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
419 | 0 | { |
420 | 0 | unsigned char *tmp_buf; |
421 | |
|
422 | 0 | if (in == NULL || in->digest == NULL) { |
423 | 0 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED); |
424 | 0 | return 0; |
425 | 0 | } |
426 | | |
427 | 0 | if (in->digest->prov == NULL |
428 | 0 | || (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) |
429 | 0 | goto legacy; |
430 | | |
431 | 0 | if (in->digest->dupctx == NULL) { |
432 | 0 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX); |
433 | 0 | return 0; |
434 | 0 | } |
435 | | |
436 | 0 | EVP_MD_CTX_reset(out); |
437 | 0 | if (out->fetched_digest != NULL) |
438 | 0 | EVP_MD_free(out->fetched_digest); |
439 | 0 | *out = *in; |
440 | | /* NULL out pointers in case of error */ |
441 | 0 | out->pctx = NULL; |
442 | 0 | out->provctx = NULL; |
443 | |
|
444 | 0 | if (in->fetched_digest != NULL) |
445 | 0 | EVP_MD_up_ref(in->fetched_digest); |
446 | |
|
447 | 0 | out->provctx = in->digest->dupctx(in->provctx); |
448 | 0 | if (out->provctx == NULL) { |
449 | 0 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX); |
450 | 0 | return 0; |
451 | 0 | } |
452 | | |
453 | | /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */ |
454 | 0 | EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX); |
455 | 0 | #ifndef FIPS_MODE |
456 | | /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */ |
457 | 0 | if (in->pctx != NULL) { |
458 | 0 | out->pctx = EVP_PKEY_CTX_dup(in->pctx); |
459 | 0 | if (out->pctx == NULL) { |
460 | 0 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX); |
461 | 0 | EVP_MD_CTX_reset(out); |
462 | 0 | return 0; |
463 | 0 | } |
464 | 0 | } |
465 | 0 | #endif |
466 | | |
467 | 0 | return 1; |
468 | | |
469 | | /* TODO(3.0): Remove legacy code below */ |
470 | 0 | legacy: |
471 | 0 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
472 | | /* Make sure it's safe to copy a digest context using an ENGINE */ |
473 | 0 | if (in->engine && !ENGINE_init(in->engine)) { |
474 | 0 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB); |
475 | 0 | return 0; |
476 | 0 | } |
477 | 0 | #endif |
478 | | |
479 | 0 | if (out->digest == in->digest) { |
480 | 0 | tmp_buf = out->md_data; |
481 | 0 | EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE); |
482 | 0 | } else |
483 | 0 | tmp_buf = NULL; |
484 | 0 | EVP_MD_CTX_reset(out); |
485 | 0 | memcpy(out, in, sizeof(*out)); |
486 | | |
487 | | /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */ |
488 | 0 | EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX); |
489 | | |
490 | | /* Null these variables, since they are getting fixed up |
491 | | * properly below. Anything else may cause a memleak and/or |
492 | | * double free if any of the memory allocations below fail |
493 | | */ |
494 | 0 | out->md_data = NULL; |
495 | 0 | out->pctx = NULL; |
496 | |
|
497 | 0 | if (in->md_data && out->digest->ctx_size) { |
498 | 0 | if (tmp_buf) |
499 | 0 | out->md_data = tmp_buf; |
500 | 0 | else { |
501 | 0 | out->md_data = OPENSSL_malloc(out->digest->ctx_size); |
502 | 0 | if (out->md_data == NULL) { |
503 | 0 | EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE); |
504 | 0 | return 0; |
505 | 0 | } |
506 | 0 | } |
507 | 0 | memcpy(out->md_data, in->md_data, out->digest->ctx_size); |
508 | 0 | } |
509 | | |
510 | 0 | out->update = in->update; |
511 | |
|
512 | 0 | #ifndef FIPS_MODE |
513 | | /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */ |
514 | 0 | if (in->pctx) { |
515 | 0 | out->pctx = EVP_PKEY_CTX_dup(in->pctx); |
516 | 0 | if (!out->pctx) { |
517 | 0 | EVP_MD_CTX_reset(out); |
518 | 0 | return 0; |
519 | 0 | } |
520 | 0 | } |
521 | 0 | #endif |
522 | | |
523 | 0 | if (out->digest->copy) |
524 | 0 | return out->digest->copy(out, in); |
525 | | |
526 | 0 | return 1; |
527 | 0 | } |
528 | | |
529 | | int EVP_Digest(const void *data, size_t count, |
530 | | unsigned char *md, unsigned int *size, const EVP_MD *type, |
531 | | ENGINE *impl) |
532 | 0 | { |
533 | 0 | EVP_MD_CTX *ctx = EVP_MD_CTX_new(); |
534 | 0 | int ret; |
535 | |
|
536 | 0 | if (ctx == NULL) |
537 | 0 | return 0; |
538 | 0 | EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT); |
539 | 0 | ret = EVP_DigestInit_ex(ctx, type, impl) |
540 | 0 | && EVP_DigestUpdate(ctx, data, count) |
541 | 0 | && EVP_DigestFinal_ex(ctx, md, size); |
542 | 0 | EVP_MD_CTX_free(ctx); |
543 | |
|
544 | 0 | return ret; |
545 | 0 | } |
546 | | |
547 | | int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[]) |
548 | 0 | { |
549 | 0 | if (digest != NULL && digest->get_params != NULL) |
550 | 0 | return digest->get_params(params); |
551 | 0 | return 0; |
552 | 0 | } |
553 | | |
554 | | const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest) |
555 | 0 | { |
556 | 0 | if (digest != NULL && digest->gettable_params != NULL) |
557 | 0 | return digest->gettable_params(); |
558 | 0 | return NULL; |
559 | 0 | } |
560 | | |
561 | | int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[]) |
562 | 0 | { |
563 | 0 | EVP_PKEY_CTX *pctx = ctx->pctx; |
564 | |
|
565 | 0 | if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL) |
566 | 0 | return ctx->digest->set_ctx_params(ctx->provctx, params); |
567 | | |
568 | 0 | if (pctx != NULL |
569 | 0 | && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
570 | 0 | || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
571 | 0 | && pctx->op.sig.sigprovctx != NULL |
572 | 0 | && pctx->op.sig.signature->set_ctx_md_params != NULL) |
573 | 0 | return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.sigprovctx, |
574 | 0 | params); |
575 | 0 | return 0; |
576 | 0 | } |
577 | | |
578 | | const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md) |
579 | 0 | { |
580 | 0 | if (md != NULL && md->settable_ctx_params != NULL) |
581 | 0 | return md->settable_ctx_params(); |
582 | 0 | return NULL; |
583 | 0 | } |
584 | | |
585 | | const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx) |
586 | 0 | { |
587 | 0 | EVP_PKEY_CTX *pctx; |
588 | |
|
589 | 0 | if (ctx != NULL |
590 | 0 | && ctx->digest != NULL |
591 | 0 | && ctx->digest->settable_ctx_params != NULL) |
592 | 0 | return ctx->digest->settable_ctx_params(); |
593 | | |
594 | 0 | pctx = ctx->pctx; |
595 | 0 | if (pctx != NULL |
596 | 0 | && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
597 | 0 | || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
598 | 0 | && pctx->op.sig.sigprovctx != NULL |
599 | 0 | && pctx->op.sig.signature->settable_ctx_md_params != NULL) |
600 | 0 | return pctx->op.sig.signature->settable_ctx_md_params( |
601 | 0 | pctx->op.sig.sigprovctx); |
602 | | |
603 | 0 | return NULL; |
604 | 0 | } |
605 | | |
606 | | int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[]) |
607 | 0 | { |
608 | 0 | EVP_PKEY_CTX *pctx = ctx->pctx; |
609 | |
|
610 | 0 | if (ctx->digest != NULL && ctx->digest->get_params != NULL) |
611 | 0 | return ctx->digest->get_ctx_params(ctx->provctx, params); |
612 | | |
613 | 0 | if (pctx != NULL |
614 | 0 | && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
615 | 0 | || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
616 | 0 | && pctx->op.sig.sigprovctx != NULL |
617 | 0 | && pctx->op.sig.signature->get_ctx_md_params != NULL) |
618 | 0 | return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.sigprovctx, |
619 | 0 | params); |
620 | | |
621 | 0 | return 0; |
622 | 0 | } |
623 | | |
624 | | const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md) |
625 | 0 | { |
626 | 0 | if (md != NULL && md->gettable_ctx_params != NULL) |
627 | 0 | return md->gettable_ctx_params(); |
628 | 0 | return NULL; |
629 | 0 | } |
630 | | |
631 | | const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx) |
632 | 0 | { |
633 | 0 | EVP_PKEY_CTX *pctx; |
634 | |
|
635 | 0 | if (ctx != NULL |
636 | 0 | && ctx->digest != NULL |
637 | 0 | && ctx->digest->gettable_ctx_params != NULL) |
638 | 0 | return ctx->digest->gettable_ctx_params(); |
639 | | |
640 | 0 | pctx = ctx->pctx; |
641 | 0 | if (pctx != NULL |
642 | 0 | && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
643 | 0 | || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
644 | 0 | && pctx->op.sig.sigprovctx != NULL |
645 | 0 | && pctx->op.sig.signature->gettable_ctx_md_params != NULL) |
646 | 0 | return pctx->op.sig.signature->gettable_ctx_md_params( |
647 | 0 | pctx->op.sig.sigprovctx); |
648 | | |
649 | 0 | return NULL; |
650 | 0 | } |
651 | | |
652 | | /* TODO(3.0): Remove legacy code below - only used by engines & DigestSign */ |
653 | | int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2) |
654 | 0 | { |
655 | 0 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
656 | 0 | int set_params = 1; |
657 | 0 | size_t sz; |
658 | 0 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
659 | |
|
660 | 0 | if (ctx == NULL || ctx->digest == NULL) { |
661 | 0 | ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL); |
662 | 0 | return 0; |
663 | 0 | } |
664 | | |
665 | 0 | if (ctx->digest->prov == NULL) |
666 | 0 | goto legacy; |
667 | | |
668 | 0 | switch (cmd) { |
669 | 0 | case EVP_MD_CTRL_XOF_LEN: |
670 | 0 | sz = (size_t)p1; |
671 | 0 | params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz); |
672 | 0 | break; |
673 | 0 | case EVP_MD_CTRL_MICALG: |
674 | 0 | set_params = 0; |
675 | 0 | params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG, |
676 | 0 | p2, p1 ? p1 : 9999); |
677 | 0 | break; |
678 | 0 | case EVP_CTRL_SSL3_MASTER_SECRET: |
679 | 0 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS, |
680 | 0 | p2, p1); |
681 | 0 | break; |
682 | 0 | default: |
683 | 0 | goto conclude; |
684 | 0 | } |
685 | | |
686 | 0 | if (set_params) |
687 | 0 | ret = EVP_MD_CTX_set_params(ctx, params); |
688 | 0 | else |
689 | 0 | ret = EVP_MD_CTX_get_params(ctx, params); |
690 | 0 | goto conclude; |
691 | | |
692 | | |
693 | | /* TODO(3.0): Remove legacy code below */ |
694 | 0 | legacy: |
695 | 0 | if (ctx->digest->md_ctrl == NULL) { |
696 | 0 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); |
697 | 0 | return 0; |
698 | 0 | } |
699 | | |
700 | 0 | ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2); |
701 | 0 | conclude: |
702 | 0 | if (ret <= 0) |
703 | 0 | return 0; |
704 | 0 | return ret; |
705 | 0 | } |
706 | | |
707 | | EVP_MD *evp_md_new(void) |
708 | 0 | { |
709 | 0 | EVP_MD *md = OPENSSL_zalloc(sizeof(*md)); |
710 | |
|
711 | 0 | if (md != NULL) { |
712 | 0 | md->lock = CRYPTO_THREAD_lock_new(); |
713 | 0 | if (md->lock == NULL) { |
714 | 0 | OPENSSL_free(md); |
715 | 0 | return NULL; |
716 | 0 | } |
717 | 0 | md->refcnt = 1; |
718 | 0 | } |
719 | 0 | return md; |
720 | 0 | } |
721 | | |
722 | | /* |
723 | | * FIPS module note: since internal fetches will be entirely |
724 | | * provider based, we know that none of its code depends on legacy |
725 | | * NIDs or any functionality that use them. |
726 | | */ |
727 | | #ifndef FIPS_MODE |
728 | | /* TODO(3.x) get rid of the need for legacy NIDs */ |
729 | | static void set_legacy_nid(const char *name, void *vlegacy_nid) |
730 | 0 | { |
731 | 0 | int nid; |
732 | 0 | int *legacy_nid = vlegacy_nid; |
733 | | /* |
734 | | * We use lowest level function to get the associated method, because |
735 | | * higher level functions such as EVP_get_digestbyname() have changed |
736 | | * to look at providers too. |
737 | | */ |
738 | 0 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH); |
739 | |
|
740 | 0 | if (*legacy_nid == -1) /* We found a clash already */ |
741 | 0 | return; |
742 | | |
743 | 0 | if (legacy_method == NULL) |
744 | 0 | return; |
745 | 0 | nid = EVP_MD_nid(legacy_method); |
746 | 0 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
747 | 0 | *legacy_nid = -1; |
748 | 0 | return; |
749 | 0 | } |
750 | 0 | *legacy_nid = nid; |
751 | 0 | } |
752 | | #endif |
753 | | |
754 | | static void *evp_md_from_dispatch(int name_id, |
755 | | const OSSL_DISPATCH *fns, |
756 | | OSSL_PROVIDER *prov) |
757 | 0 | { |
758 | 0 | EVP_MD *md = NULL; |
759 | 0 | int fncnt = 0; |
760 | | |
761 | | /* EVP_MD_fetch() will set the legacy NID if available */ |
762 | 0 | if ((md = evp_md_new()) == NULL) { |
763 | 0 | EVPerr(0, ERR_R_MALLOC_FAILURE); |
764 | 0 | return NULL; |
765 | 0 | } |
766 | | |
767 | 0 | #ifndef FIPS_MODE |
768 | | /* TODO(3.x) get rid of the need for legacy NIDs */ |
769 | 0 | md->type = NID_undef; |
770 | 0 | evp_names_do_all(prov, name_id, set_legacy_nid, &md->type); |
771 | 0 | if (md->type == -1) { |
772 | 0 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); |
773 | 0 | EVP_MD_free(md); |
774 | 0 | return NULL; |
775 | 0 | } |
776 | 0 | #endif |
777 | | |
778 | 0 | md->name_id = name_id; |
779 | |
|
780 | 0 | for (; fns->function_id != 0; fns++) { |
781 | 0 | switch (fns->function_id) { |
782 | 0 | case OSSL_FUNC_DIGEST_NEWCTX: |
783 | 0 | if (md->newctx == NULL) { |
784 | 0 | md->newctx = OSSL_get_OP_digest_newctx(fns); |
785 | 0 | fncnt++; |
786 | 0 | } |
787 | 0 | break; |
788 | 0 | case OSSL_FUNC_DIGEST_INIT: |
789 | 0 | if (md->dinit == NULL) { |
790 | 0 | md->dinit = OSSL_get_OP_digest_init(fns); |
791 | 0 | fncnt++; |
792 | 0 | } |
793 | 0 | break; |
794 | 0 | case OSSL_FUNC_DIGEST_UPDATE: |
795 | 0 | if (md->dupdate == NULL) { |
796 | 0 | md->dupdate = OSSL_get_OP_digest_update(fns); |
797 | 0 | fncnt++; |
798 | 0 | } |
799 | 0 | break; |
800 | 0 | case OSSL_FUNC_DIGEST_FINAL: |
801 | 0 | if (md->dfinal == NULL) { |
802 | 0 | md->dfinal = OSSL_get_OP_digest_final(fns); |
803 | 0 | fncnt++; |
804 | 0 | } |
805 | 0 | break; |
806 | 0 | case OSSL_FUNC_DIGEST_DIGEST: |
807 | 0 | if (md->digest == NULL) |
808 | 0 | md->digest = OSSL_get_OP_digest_digest(fns); |
809 | | /* We don't increment fnct for this as it is stand alone */ |
810 | 0 | break; |
811 | 0 | case OSSL_FUNC_DIGEST_FREECTX: |
812 | 0 | if (md->freectx == NULL) { |
813 | 0 | md->freectx = OSSL_get_OP_digest_freectx(fns); |
814 | 0 | fncnt++; |
815 | 0 | } |
816 | 0 | break; |
817 | 0 | case OSSL_FUNC_DIGEST_DUPCTX: |
818 | 0 | if (md->dupctx == NULL) |
819 | 0 | md->dupctx = OSSL_get_OP_digest_dupctx(fns); |
820 | 0 | break; |
821 | 0 | case OSSL_FUNC_DIGEST_GET_PARAMS: |
822 | 0 | if (md->get_params == NULL) |
823 | 0 | md->get_params = OSSL_get_OP_digest_get_params(fns); |
824 | 0 | break; |
825 | 0 | case OSSL_FUNC_DIGEST_SET_CTX_PARAMS: |
826 | 0 | if (md->set_ctx_params == NULL) |
827 | 0 | md->set_ctx_params = OSSL_get_OP_digest_set_ctx_params(fns); |
828 | 0 | break; |
829 | 0 | case OSSL_FUNC_DIGEST_GET_CTX_PARAMS: |
830 | 0 | if (md->get_ctx_params == NULL) |
831 | 0 | md->get_ctx_params = OSSL_get_OP_digest_get_ctx_params(fns); |
832 | 0 | break; |
833 | 0 | case OSSL_FUNC_DIGEST_GETTABLE_PARAMS: |
834 | 0 | if (md->gettable_params == NULL) |
835 | 0 | md->gettable_params = OSSL_get_OP_digest_gettable_params(fns); |
836 | 0 | break; |
837 | 0 | case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS: |
838 | 0 | if (md->settable_ctx_params == NULL) |
839 | 0 | md->settable_ctx_params = |
840 | 0 | OSSL_get_OP_digest_settable_ctx_params(fns); |
841 | 0 | break; |
842 | 0 | case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS: |
843 | 0 | if (md->gettable_ctx_params == NULL) |
844 | 0 | md->gettable_ctx_params = |
845 | 0 | OSSL_get_OP_digest_gettable_ctx_params(fns); |
846 | 0 | break; |
847 | 0 | } |
848 | 0 | } |
849 | 0 | if ((fncnt != 0 && fncnt != 5) |
850 | 0 | || (fncnt == 0 && md->digest == NULL)) { |
851 | | /* |
852 | | * In order to be a consistent set of functions we either need the |
853 | | * whole set of init/update/final etc functions or none of them. |
854 | | * The "digest" function can standalone. We at least need one way to |
855 | | * generate digests. |
856 | | */ |
857 | 0 | EVP_MD_free(md); |
858 | 0 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
859 | 0 | return NULL; |
860 | 0 | } |
861 | 0 | md->prov = prov; |
862 | 0 | if (prov != NULL) |
863 | 0 | ossl_provider_up_ref(prov); |
864 | |
|
865 | 0 | return md; |
866 | 0 | } |
867 | | |
868 | | static int evp_md_up_ref(void *md) |
869 | 0 | { |
870 | 0 | return EVP_MD_up_ref(md); |
871 | 0 | } |
872 | | |
873 | | static void evp_md_free(void *md) |
874 | 0 | { |
875 | 0 | EVP_MD_free(md); |
876 | 0 | } |
877 | | |
878 | | EVP_MD *EVP_MD_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
879 | | const char *properties) |
880 | 0 | { |
881 | 0 | EVP_MD *md = |
882 | 0 | evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties, |
883 | 0 | evp_md_from_dispatch, evp_md_up_ref, evp_md_free); |
884 | |
|
885 | 0 | return md; |
886 | 0 | } |
887 | | |
888 | | int EVP_MD_up_ref(EVP_MD *md) |
889 | 0 | { |
890 | 0 | int ref = 0; |
891 | |
|
892 | 0 | CRYPTO_UP_REF(&md->refcnt, &ref, md->lock); |
893 | 0 | return 1; |
894 | 0 | } |
895 | | |
896 | | void EVP_MD_free(EVP_MD *md) |
897 | 0 | { |
898 | 0 | int i; |
899 | |
|
900 | 0 | if (md == NULL) |
901 | 0 | return; |
902 | | |
903 | 0 | CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock); |
904 | 0 | if (i > 0) |
905 | 0 | return; |
906 | 0 | ossl_provider_free(md->prov); |
907 | 0 | CRYPTO_THREAD_lock_free(md->lock); |
908 | 0 | OPENSSL_free(md); |
909 | 0 | } |
910 | | |
911 | | void EVP_MD_do_all_provided(OPENSSL_CTX *libctx, |
912 | | void (*fn)(EVP_MD *mac, void *arg), |
913 | | void *arg) |
914 | 0 | { |
915 | 0 | evp_generic_do_all(libctx, OSSL_OP_DIGEST, |
916 | 0 | (void (*)(void *, void *))fn, arg, |
917 | 0 | evp_md_from_dispatch, evp_md_free); |
918 | 0 | } |