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,
42 OPENSSL_CTX *libctx, int ver)
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) {
64 ctx->pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, props);
66 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
68 if (ctx->pctx == NULL)
72 evp_pkey_ctx_free_old_ops(locpctx);
75 * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
76 * calls can be removed.
80 if (locpctx->engine != NULL || locpctx->keytype == NULL)
84 * Ensure that the key is provided, either natively, or as a cached export.
87 tmp_keymgmt = locpctx->keymgmt;
88 provkey = evp_pkey_export_to_provider(locpctx->pkey, locpctx->libctx,
89 &tmp_keymgmt, locpctx->propquery);
92 if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
93 ERR_clear_last_mark();
94 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
97 EVP_KEYMGMT_free(locpctx->keymgmt);
98 locpctx->keymgmt = tmp_keymgmt;
100 if (locpctx->keymgmt->query_operation_name != NULL)
102 locpctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
105 * If we didn't get a supported sig, assume there is one with the
106 * same name as the key type.
108 if (supported_sig == NULL)
109 supported_sig = locpctx->keytype;
112 * Because we cleared out old ops, we shouldn't need to worry about
113 * checking if signature is already there.
115 signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
118 if (signature == NULL
119 || (EVP_KEYMGMT_provider(locpctx->keymgmt)
120 != EVP_SIGNATURE_provider(signature))) {
122 * We don't need to free ctx->keymgmt here, as it's not necessarily
123 * tied to this operation. It will be freed by EVP_PKEY_CTX_free().
125 EVP_SIGNATURE_free(signature);
130 * TODO remove this when legacy is gone
131 * If we don't have the full support we need with provided methods,
132 * let's go see if legacy does.
136 /* No more legacy from here down to legacy: */
141 locpctx->op.sig.signature = signature;
142 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
143 : EVP_PKEY_OP_SIGNCTX;
144 locpctx->op.sig.sigprovctx
145 = signature->newctx(ossl_provider_ctx(signature->prov));
146 if (locpctx->op.sig.sigprovctx == NULL) {
147 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
151 ctx->reqdigest = type;
153 mdname = canon_mdname(EVP_MD_name(type));
156 && EVP_PKEY_get_default_digest_name(locpctx->pkey, locmdname,
158 mdname = canon_mdname(locmdname);
160 if (mdname != NULL) {
162 * This might be requested by a later call to EVP_MD_CTX_md().
163 * In that case the "explicit fetch" rules apply for that
164 * function (as per man pages), i.e. the ref count is not updated
165 * so the EVP_MD should not be used beyound the lifetime of the
168 ctx->reqdigest = ctx->fetched_digest =
169 EVP_MD_fetch(locpctx->libctx, mdname, props);
174 if (signature->digest_verify_init == NULL) {
175 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
178 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
179 mdname, props, provkey);
181 if (signature->digest_sign_init == NULL) {
182 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
185 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
186 mdname, props, provkey);
191 evp_pkey_ctx_free_old_ops(locpctx);
192 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
197 * TODO remove this when legacy is gone
198 * If we don't have the full support we need with provided methods,
199 * let's go see if legacy does.
203 if (ctx->pctx->pmeth == NULL) {
204 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
208 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
212 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
213 type = EVP_get_digestbynid(def_nid);
217 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
223 if (ctx->pctx->pmeth->verifyctx_init) {
224 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
226 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
227 } else if (ctx->pctx->pmeth->digestverify != 0) {
228 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
229 ctx->update = update;
230 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
234 if (ctx->pctx->pmeth->signctx_init) {
235 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
237 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
238 } else if (ctx->pctx->pmeth->digestsign != 0) {
239 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
240 ctx->update = update;
241 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
245 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
249 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
251 if (!EVP_DigestInit_ex(ctx, type, e))
254 * This indicates the current algorithm requires
255 * special treatment before hashing the tbs-message.
257 ctx->pctx->flag_call_digest_custom = 0;
258 if (ctx->pctx->pmeth->digest_custom != NULL)
259 ctx->pctx->flag_call_digest_custom = 1;
264 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
265 const char *mdname, const char *props, EVP_PKEY *pkey,
268 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, libctx,
272 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
273 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
275 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 0);
278 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
279 const char *mdname, const char *props,
280 EVP_PKEY *pkey, OPENSSL_CTX *libctx)
282 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, libctx, 1);
285 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
286 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
288 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 1);
290 #endif /* FIPS_MDOE */
292 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
294 EVP_PKEY_CTX *pctx = ctx->pctx;
297 || pctx->operation != EVP_PKEY_OP_SIGNCTX
298 || pctx->op.sig.sigprovctx == NULL
299 || pctx->op.sig.signature == NULL)
302 if (pctx->op.sig.signature->digest_sign_update == NULL) {
303 ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
307 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
311 /* do_sigver_init() checked that |digest_custom| is non-NULL */
312 if (pctx->flag_call_digest_custom
313 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
315 pctx->flag_call_digest_custom = 0;
317 return EVP_DigestUpdate(ctx, data, dsize);
320 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
322 EVP_PKEY_CTX *pctx = ctx->pctx;
325 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
326 || pctx->op.sig.sigprovctx == NULL
327 || pctx->op.sig.signature == NULL)
330 if (pctx->op.sig.signature->digest_verify_update == NULL) {
331 ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
335 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
339 /* do_sigver_init() checked that |digest_custom| is non-NULL */
340 if (pctx->flag_call_digest_custom
341 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
343 pctx->flag_call_digest_custom = 0;
345 return EVP_DigestUpdate(ctx, data, dsize);
349 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
353 EVP_PKEY_CTX *pctx = ctx->pctx;
356 || pctx->operation != EVP_PKEY_OP_SIGNCTX
357 || pctx->op.sig.sigprovctx == NULL
358 || pctx->op.sig.signature == NULL)
361 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
362 sigret, siglen, SIZE_MAX);
365 if (pctx == NULL || pctx->pmeth == NULL) {
366 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
370 /* do_sigver_init() checked that |digest_custom| is non-NULL */
371 if (pctx->flag_call_digest_custom
372 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
374 pctx->flag_call_digest_custom = 0;
376 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
378 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
379 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
380 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
382 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(pctx);
386 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
387 EVP_PKEY_CTX_free(dctx);
391 if (pctx->pmeth->signctx != NULL)
395 if (sigret != NULL) {
396 unsigned char md[EVP_MAX_MD_SIZE];
397 unsigned int mdlen = 0;
399 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
401 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
403 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
405 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
409 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
410 EVP_MD_CTX_free(tmp_ctx);
414 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
415 sigret, siglen, tmp_ctx);
417 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
418 EVP_MD_CTX_free(tmp_ctx);
422 if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
426 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
429 int s = EVP_MD_size(ctx->digest);
431 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
438 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
439 const unsigned char *tbs, size_t tbslen)
441 EVP_PKEY_CTX *pctx = ctx->pctx;
444 && pctx->operation == EVP_PKEY_OP_SIGNCTX
445 && pctx->op.sig.sigprovctx != NULL
446 && pctx->op.sig.signature != NULL) {
447 if (pctx->op.sig.signature->digest_sign != NULL)
448 return pctx->op.sig.signature->digest_sign(pctx->op.sig.sigprovctx,
449 sigret, siglen, SIZE_MAX,
453 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
454 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
457 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
459 return EVP_DigestSignFinal(ctx, sigret, siglen);
462 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
465 unsigned char md[EVP_MAX_MD_SIZE];
467 unsigned int mdlen = 0;
469 EVP_PKEY_CTX *pctx = ctx->pctx;
472 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
473 || pctx->op.sig.sigprovctx == NULL
474 || pctx->op.sig.signature == NULL)
477 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
481 if (pctx == NULL || pctx->pmeth == NULL) {
482 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
486 /* do_sigver_init() checked that |digest_custom| is non-NULL */
487 if (pctx->flag_call_digest_custom
488 && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
490 pctx->flag_call_digest_custom = 0;
492 if (pctx->pmeth->verifyctx != NULL)
496 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
498 r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
500 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
502 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
505 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
506 EVP_MD_CTX_free(tmp_ctx);
510 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
511 sig, siglen, tmp_ctx);
513 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
514 EVP_MD_CTX_free(tmp_ctx);
518 return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
521 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
522 size_t siglen, const unsigned char *tbs, size_t tbslen)
524 EVP_PKEY_CTX *pctx = ctx->pctx;
527 && pctx->operation == EVP_PKEY_OP_VERIFYCTX
528 && pctx->op.sig.sigprovctx != NULL
529 && pctx->op.sig.signature != NULL) {
530 if (pctx->op.sig.signature->digest_verify != NULL)
531 return pctx->op.sig.signature->digest_verify(pctx->op.sig.sigprovctx,
536 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
537 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
540 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
542 return EVP_DigestVerifyFinal(ctx, sigret, siglen);
544 #endif /* FIPS_MODE */