2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include "internal/cryptlib.h"
12 #include <openssl/evp.h>
13 #include <openssl/objects.h>
14 #include <openssl/x509.h>
15 #include "crypto/evp.h"
16 #include "internal/provider.h"
17 #include "evp_local.h"
21 static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
23 EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
28 * If we get the "NULL" md then the name comes back as "UNDEF". We want to use
31 static const char *canon_mdname(const char *mdname)
33 if (mdname != NULL && strcmp(mdname, "UNDEF") == 0)
39 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
40 const EVP_MD *type, const char *mdname,
41 const char *props, ENGINE *e, EVP_PKEY *pkey,
44 EVP_PKEY_CTX *locpctx = NULL;
45 EVP_SIGNATURE *signature = NULL;
46 EVP_KEYMGMT *tmp_keymgmt = NULL;
47 const char *supported_sig = NULL;
48 char locmdname[80] = ""; /* 80 chars should be enough */
52 if (ctx->provctx != NULL) {
53 if (!ossl_assert(ctx->digest != NULL)) {
54 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
57 if (ctx->digest->freectx != NULL)
58 ctx->digest->freectx(ctx->provctx);
62 if (ctx->pctx == NULL)
63 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
64 if (ctx->pctx == NULL)
68 evp_pkey_ctx_free_old_ops(locpctx);
71 * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
72 * calls can be removed.
76 if (locpctx->engine != NULL || locpctx->keytype == NULL)
80 * Ensure that the key is provided, either natively, or as a cached export.
83 tmp_keymgmt = locpctx->keymgmt;
84 provkey = evp_pkey_export_to_provider(locpctx->pkey, locpctx->libctx,
85 &tmp_keymgmt, locpctx->propquery);
88 if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
89 ERR_clear_last_mark();
90 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
93 EVP_KEYMGMT_free(locpctx->keymgmt);
94 locpctx->keymgmt = tmp_keymgmt;
96 if (locpctx->keymgmt->query_operation_name != NULL)
98 locpctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
101 * If we didn't get a supported sig, assume there is one with the
102 * same name as the key type.
104 if (supported_sig == NULL)
105 supported_sig = locpctx->keytype;
108 * Because we cleared out old ops, we shouldn't need to worry about
109 * checking if signature is already there.
111 signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
114 if (signature == NULL
115 || (EVP_KEYMGMT_provider(locpctx->keymgmt)
116 != EVP_SIGNATURE_provider(signature))) {
118 * We don't need to free ctx->keymgmt here, as it's not necessarily
119 * tied to this operation. It will be freed by EVP_PKEY_CTX_free().
121 EVP_SIGNATURE_free(signature);
126 * TODO remove this when legacy is gone
127 * If we don't have the full support we need with provided methods,
128 * let's go see if legacy does.
132 /* No more legacy from here down to legacy: */
137 locpctx->op.sig.signature = signature;
138 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
139 : EVP_PKEY_OP_SIGNCTX;
140 locpctx->op.sig.sigprovctx
141 = signature->newctx(ossl_provider_ctx(signature->prov));
142 if (locpctx->op.sig.sigprovctx == NULL) {
143 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
147 ctx->reqdigest = type;
149 mdname = canon_mdname(EVP_MD_name(type));
152 && EVP_PKEY_get_default_digest_name(locpctx->pkey, locmdname,
154 mdname = canon_mdname(locmdname);
156 if (mdname != NULL) {
158 * This might be requested by a later call to EVP_MD_CTX_md().
159 * In that case the "explicit fetch" rules apply for that
160 * function (as per man pages), i.e. the ref count is not updated
161 * so the EVP_MD should not be used beyound the lifetime of the
164 ctx->reqdigest = ctx->fetched_digest =
165 EVP_MD_fetch(locpctx->libctx, mdname, props);
170 if (signature->digest_verify_init == NULL) {
171 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
174 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
175 mdname, props, provkey);
177 if (signature->digest_sign_init == NULL) {
178 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
181 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
182 mdname, props, provkey);
187 evp_pkey_ctx_free_old_ops(locpctx);
188 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
193 * TODO remove this when legacy is gone
194 * If we don't have the full support we need with provided methods,
195 * let's go see if legacy does.
199 if (ctx->pctx->pmeth == NULL) {
200 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
204 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
208 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
209 type = EVP_get_digestbynid(def_nid);
213 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
219 if (ctx->pctx->pmeth->verifyctx_init) {
220 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
222 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
223 } else if (ctx->pctx->pmeth->digestverify != 0) {
224 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
225 ctx->update = update;
226 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
230 if (ctx->pctx->pmeth->signctx_init) {
231 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
233 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
234 } else if (ctx->pctx->pmeth->digestsign != 0) {
235 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
236 ctx->update = update;
237 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
241 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
245 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
247 if (!EVP_DigestInit_ex(ctx, type, e))
250 * This indicates the current algorithm requires
251 * special treatment before hashing the tbs-message.
253 ctx->pctx->flag_call_digest_custom = 0;
254 if (ctx->pctx->pmeth->digest_custom != NULL)
255 ctx->pctx->flag_call_digest_custom = 1;
260 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
261 const char *mdname, const char *props, EVP_PKEY *pkey)
263 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 0);
266 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
267 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
269 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 0);
272 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
273 const char *mdname, const char *props,
276 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 1);
279 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
280 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
282 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 1);
284 #endif /* FIPS_MDOE */
286 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
288 EVP_PKEY_CTX *pctx = ctx->pctx;
291 || pctx->operation != EVP_PKEY_OP_SIGNCTX
292 || pctx->op.sig.sigprovctx == NULL
293 || pctx->op.sig.signature == NULL)
296 if (pctx->op.sig.signature->digest_sign_update == NULL) {
297 ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
301 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
305 /* do_sigver_init() checked that |digest_custom| is non-NULL */
306 if (pctx->flag_call_digest_custom
307 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
309 pctx->flag_call_digest_custom = 0;
311 return EVP_DigestUpdate(ctx, data, dsize);
314 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
316 EVP_PKEY_CTX *pctx = ctx->pctx;
319 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
320 || pctx->op.sig.sigprovctx == NULL
321 || pctx->op.sig.signature == NULL)
324 if (pctx->op.sig.signature->digest_verify_update == NULL) {
325 ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
329 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
333 /* do_sigver_init() checked that |digest_custom| is non-NULL */
334 if (pctx->flag_call_digest_custom
335 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
337 pctx->flag_call_digest_custom = 0;
339 return EVP_DigestUpdate(ctx, data, dsize);
343 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
347 EVP_PKEY_CTX *pctx = ctx->pctx;
350 || pctx->operation != EVP_PKEY_OP_SIGNCTX
351 || pctx->op.sig.sigprovctx == NULL
352 || pctx->op.sig.signature == NULL)
355 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
356 sigret, siglen, SIZE_MAX);
359 if (pctx == NULL || pctx->pmeth == NULL) {
360 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
364 /* do_sigver_init() checked that |digest_custom| is non-NULL */
365 if (pctx->flag_call_digest_custom
366 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
368 pctx->flag_call_digest_custom = 0;
370 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
372 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
373 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
374 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
376 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(pctx);
380 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
381 EVP_PKEY_CTX_free(dctx);
385 if (pctx->pmeth->signctx != NULL)
389 if (sigret != NULL) {
390 unsigned char md[EVP_MAX_MD_SIZE];
391 unsigned int mdlen = 0;
393 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
395 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
397 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
399 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
403 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
404 EVP_MD_CTX_free(tmp_ctx);
408 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
409 sigret, siglen, tmp_ctx);
411 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
412 EVP_MD_CTX_free(tmp_ctx);
416 if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
420 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
423 int s = EVP_MD_size(ctx->digest);
425 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
432 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
433 const unsigned char *tbs, size_t tbslen)
435 EVP_PKEY_CTX *pctx = ctx->pctx;
438 && pctx->operation == EVP_PKEY_OP_SIGNCTX
439 && pctx->op.sig.sigprovctx != NULL
440 && pctx->op.sig.signature != NULL) {
441 if (pctx->op.sig.signature->digest_sign != NULL)
442 return pctx->op.sig.signature->digest_sign(pctx->op.sig.sigprovctx,
443 sigret, siglen, SIZE_MAX,
447 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
448 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
451 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
453 return EVP_DigestSignFinal(ctx, sigret, siglen);
456 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
459 unsigned char md[EVP_MAX_MD_SIZE];
461 unsigned int mdlen = 0;
463 EVP_PKEY_CTX *pctx = ctx->pctx;
466 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
467 || pctx->op.sig.sigprovctx == NULL
468 || pctx->op.sig.signature == NULL)
471 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
475 if (pctx == NULL || pctx->pmeth == NULL) {
476 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
480 /* do_sigver_init() checked that |digest_custom| is non-NULL */
481 if (pctx->flag_call_digest_custom
482 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
484 pctx->flag_call_digest_custom = 0;
486 if (pctx->pmeth->verifyctx != NULL)
490 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
492 r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
494 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
496 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
499 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
500 EVP_MD_CTX_free(tmp_ctx);
504 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
505 sig, siglen, tmp_ctx);
507 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
508 EVP_MD_CTX_free(tmp_ctx);
512 return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
515 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
516 size_t siglen, const unsigned char *tbs, size_t tbslen)
518 EVP_PKEY_CTX *pctx = ctx->pctx;
521 && pctx->operation == EVP_PKEY_OP_VERIFYCTX
522 && pctx->op.sig.sigprovctx != NULL
523 && pctx->op.sig.signature != NULL) {
524 if (pctx->op.sig.signature->digest_verify != NULL)
525 return pctx->op.sig.signature->digest_verify(pctx->op.sig.sigprovctx,
530 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
531 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
534 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
536 return EVP_DigestVerifyFinal(ctx, sigret, siglen);
538 #endif /* FIPS_MODE */