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);
27 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
28 const EVP_MD *type, const char *mdname,
29 const char *props, ENGINE *e, EVP_PKEY *pkey,
32 EVP_PKEY_CTX *locpctx = NULL;
33 EVP_SIGNATURE *signature = NULL;
34 EVP_KEYMGMT *tmp_keymgmt = NULL;
35 const char *supported_sig = NULL;
36 char locmdname[80] = ""; /* 80 chars should be enough */
40 if (ctx->provctx != NULL) {
41 if (!ossl_assert(ctx->digest != NULL)) {
42 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
45 if (ctx->digest->freectx != NULL)
46 ctx->digest->freectx(ctx->provctx);
50 if (ctx->pctx == NULL)
51 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
52 if (ctx->pctx == NULL)
56 evp_pkey_ctx_free_old_ops(locpctx);
59 * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
60 * calls can be removed.
64 if (locpctx->keytype == NULL)
67 /* Ensure that the key is provided. If not, go legacy */
68 tmp_keymgmt = locpctx->keymgmt;
69 provkey = evp_pkey_make_provided(locpctx->pkey, locpctx->libctx,
70 &tmp_keymgmt, locpctx->propquery);
73 if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
74 ERR_clear_last_mark();
75 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
78 EVP_KEYMGMT_free(locpctx->keymgmt);
79 locpctx->keymgmt = tmp_keymgmt;
81 if (locpctx->keymgmt->query_operation_name != NULL)
83 locpctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
86 * If we didn't get a supported sig, assume there is one with the
87 * same name as the key type.
89 if (supported_sig == NULL)
90 supported_sig = locpctx->keytype;
93 * Because we cleared out old ops, we shouldn't need to worry about
94 * checking if signature is already there.
96 signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
100 || (EVP_KEYMGMT_provider(locpctx->keymgmt)
101 != EVP_SIGNATURE_provider(signature))) {
103 * We don't need to free ctx->keymgmt here, as it's not necessarily
104 * tied to this operation. It will be freed by EVP_PKEY_CTX_free().
106 EVP_SIGNATURE_free(signature);
111 * TODO remove this when legacy is gone
112 * If we don't have the full support we need with provided methods,
113 * let's go see if legacy does.
117 /* No more legacy from here down to legacy: */
122 locpctx->op.sig.signature = signature;
123 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
124 : EVP_PKEY_OP_SIGNCTX;
125 locpctx->op.sig.sigprovctx
126 = signature->newctx(ossl_provider_ctx(signature->prov));
127 if (locpctx->op.sig.sigprovctx == NULL) {
128 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
132 ctx->reqdigest = type;
134 mdname = EVP_MD_name(type);
137 && EVP_PKEY_get_default_digest_name(locpctx->pkey, locmdname,
141 if (mdname != NULL) {
143 * This might be requested by a later call to EVP_MD_CTX_md().
144 * In that case the "explicit fetch" rules apply for that
145 * function (as per man pages), i.e. the ref count is not updated
146 * so the EVP_MD should not be used beyound the lifetime of the
149 ctx->reqdigest = ctx->fetched_digest =
150 EVP_MD_fetch(locpctx->libctx, mdname, props);
155 if (signature->digest_verify_init == NULL) {
156 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
159 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
160 mdname, props, provkey);
162 if (signature->digest_sign_init == NULL) {
163 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
166 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
167 mdname, props, provkey);
172 evp_pkey_ctx_free_old_ops(locpctx);
173 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
178 * TODO remove this when legacy is gone
179 * If we don't have the full support we need with provided methods,
180 * let's go see if legacy does.
184 if (ctx->pctx->pmeth == NULL) {
185 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
189 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
193 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
194 type = EVP_get_digestbynid(def_nid);
198 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
204 if (ctx->pctx->pmeth->verifyctx_init) {
205 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
207 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
208 } else if (ctx->pctx->pmeth->digestverify != 0) {
209 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
210 ctx->update = update;
211 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
215 if (ctx->pctx->pmeth->signctx_init) {
216 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
218 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
219 } else if (ctx->pctx->pmeth->digestsign != 0) {
220 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
221 ctx->update = update;
222 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
226 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
230 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
232 if (!EVP_DigestInit_ex(ctx, type, e))
235 * This indicates the current algorithm requires
236 * special treatment before hashing the tbs-message.
238 if (ctx->pctx->pmeth->digest_custom != NULL)
239 return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
244 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
245 const char *mdname, const char *props, EVP_PKEY *pkey)
247 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 0);
250 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
251 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
253 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 0);
256 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
257 const char *mdname, const char *props,
260 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 1);
263 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
264 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
266 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 1);
268 #endif /* FIPS_MDOE */
270 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
272 EVP_PKEY_CTX *pctx = ctx->pctx;
275 || pctx->operation != EVP_PKEY_OP_SIGNCTX
276 || pctx->op.sig.sigprovctx == NULL
277 || pctx->op.sig.signature == NULL)
280 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
284 return EVP_DigestUpdate(ctx, data, dsize);
287 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
289 EVP_PKEY_CTX *pctx = ctx->pctx;
292 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
293 || pctx->op.sig.sigprovctx == NULL
294 || pctx->op.sig.signature == NULL)
297 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
301 return EVP_DigestUpdate(ctx, data, dsize);
305 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
309 EVP_PKEY_CTX *pctx = ctx->pctx;
312 || pctx->operation != EVP_PKEY_OP_SIGNCTX
313 || pctx->op.sig.sigprovctx == NULL
314 || pctx->op.sig.signature == NULL)
317 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
318 sigret, siglen, SIZE_MAX);
321 if (pctx == NULL || pctx->pmeth == NULL) {
322 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
326 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
328 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
329 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
330 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
332 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(pctx);
336 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
337 EVP_PKEY_CTX_free(dctx);
341 if (pctx->pmeth->signctx != NULL)
345 if (sigret != NULL) {
346 unsigned char md[EVP_MAX_MD_SIZE];
347 unsigned int mdlen = 0;
349 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
351 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
353 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
355 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
359 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
360 EVP_MD_CTX_free(tmp_ctx);
364 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
365 sigret, siglen, tmp_ctx);
367 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
368 EVP_MD_CTX_free(tmp_ctx);
372 if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
376 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
379 int s = EVP_MD_size(ctx->digest);
381 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
388 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
389 const unsigned char *tbs, size_t tbslen)
391 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
392 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
393 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
395 return EVP_DigestSignFinal(ctx, sigret, siglen);
398 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
401 unsigned char md[EVP_MAX_MD_SIZE];
403 unsigned int mdlen = 0;
405 EVP_PKEY_CTX *pctx = ctx->pctx;
408 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
409 || pctx->op.sig.sigprovctx == NULL
410 || pctx->op.sig.signature == NULL)
413 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
417 if (pctx == NULL || pctx->pmeth == NULL) {
418 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
422 if (pctx->pmeth->verifyctx != NULL)
426 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
428 r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
430 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
432 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
435 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
436 EVP_MD_CTX_free(tmp_ctx);
440 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
441 sig, siglen, tmp_ctx);
443 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
444 EVP_MD_CTX_free(tmp_ctx);
448 return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
451 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
452 size_t siglen, const unsigned char *tbs, size_t tbslen)
454 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
455 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
456 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
458 return EVP_DigestVerifyFinal(ctx, sigret, siglen);
460 #endif /* FIPS_MODE */