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;
39 if (ctx->provctx != NULL) {
40 if (!ossl_assert(ctx->digest != NULL)) {
41 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
44 if (ctx->digest->freectx != NULL)
45 ctx->digest->freectx(ctx->provctx);
49 if (ctx->pctx == NULL)
50 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
51 if (ctx->pctx == NULL)
55 evp_pkey_ctx_free_old_ops(locpctx);
58 * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
59 * calls can be removed.
63 if (locpctx->keytype == NULL)
68 mdname = EVP_MD_name(type);
69 } else if (pkey != NULL) {
71 * TODO(v3.0) work out a better way for EVP_PKEYs with no legacy
74 if (pkey->pkey.ptr != NULL) {
76 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
77 mdname = OBJ_nid2sn(def_nid);
82 /* Ensure that the key is provided. If not, go legacy */
83 tmp_keymgmt = locpctx->keymgmt;
84 provkey = evp_pkey_make_provided(locpctx->pkey, locpctx->libctx,
85 &tmp_keymgmt, locpctx->propquery, 0);
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: */
134 locpctx->op.sig.signature = signature;
135 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
136 : EVP_PKEY_OP_SIGNCTX;
137 locpctx->op.sig.sigprovctx
138 = signature->newctx(ossl_provider_ctx(signature->prov));
139 if (locpctx->op.sig.sigprovctx == NULL) {
140 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
144 ctx->reqdigest = type;
147 * This might be requested by a later call to EVP_MD_CTX_md(). In that
148 * case the "explicit fetch" rules apply for that function (as per
149 * man pages), i.e. the ref count is not updated so the EVP_MD should
150 * not be used beyound the lifetime of the EVP_MD_CTX.
152 ctx->reqdigest = ctx->fetched_digest =
153 EVP_MD_fetch(locpctx->libctx, mdname, props);
157 if (signature->digest_verify_init == NULL) {
158 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
161 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
162 mdname, props, provkey);
164 if (signature->digest_sign_init == NULL) {
165 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
168 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
169 mdname, props, provkey);
174 evp_pkey_ctx_free_old_ops(locpctx);
175 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
180 * TODO remove this when legacy is gone
181 * If we don't have the full support we need with provided methods,
182 * let's go see if legacy does.
186 if (ctx->pctx->pmeth == NULL) {
187 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
191 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
195 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
196 type = EVP_get_digestbynid(def_nid);
200 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
206 if (ctx->pctx->pmeth->verifyctx_init) {
207 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
209 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
210 } else if (ctx->pctx->pmeth->digestverify != 0) {
211 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
212 ctx->update = update;
213 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
217 if (ctx->pctx->pmeth->signctx_init) {
218 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
220 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
221 } else if (ctx->pctx->pmeth->digestsign != 0) {
222 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
223 ctx->update = update;
224 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
228 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
232 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
234 if (!EVP_DigestInit_ex(ctx, type, e))
237 * This indicates the current algorithm requires
238 * special treatment before hashing the tbs-message.
240 if (ctx->pctx->pmeth->digest_custom != NULL)
241 return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
246 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
247 const char *mdname, const char *props, EVP_PKEY *pkey)
249 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 0);
252 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
253 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
255 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 0);
258 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
259 const char *mdname, const char *props,
262 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 1);
265 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
266 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
268 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 1);
270 #endif /* FIPS_MDOE */
272 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
274 EVP_PKEY_CTX *pctx = ctx->pctx;
277 || pctx->operation != EVP_PKEY_OP_SIGNCTX
278 || pctx->op.sig.sigprovctx == NULL
279 || pctx->op.sig.signature == NULL)
282 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
286 return EVP_DigestUpdate(ctx, data, dsize);
289 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
291 EVP_PKEY_CTX *pctx = ctx->pctx;
294 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
295 || pctx->op.sig.sigprovctx == NULL
296 || pctx->op.sig.signature == NULL)
299 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
303 return EVP_DigestUpdate(ctx, data, dsize);
307 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
311 EVP_PKEY_CTX *pctx = ctx->pctx;
314 || pctx->operation != EVP_PKEY_OP_SIGNCTX
315 || pctx->op.sig.sigprovctx == NULL
316 || pctx->op.sig.signature == NULL)
319 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
320 sigret, siglen, SIZE_MAX);
323 if (pctx == NULL || pctx->pmeth == NULL) {
324 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
328 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
330 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
331 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
332 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
334 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(pctx);
338 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
339 EVP_PKEY_CTX_free(dctx);
343 if (pctx->pmeth->signctx != NULL)
347 if (sigret != NULL) {
348 unsigned char md[EVP_MAX_MD_SIZE];
349 unsigned int mdlen = 0;
351 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
353 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
355 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
357 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
361 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
362 EVP_MD_CTX_free(tmp_ctx);
366 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
367 sigret, siglen, tmp_ctx);
369 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
370 EVP_MD_CTX_free(tmp_ctx);
374 if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
378 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
381 int s = EVP_MD_size(ctx->digest);
383 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
390 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
391 const unsigned char *tbs, size_t tbslen)
393 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
394 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
395 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
397 return EVP_DigestSignFinal(ctx, sigret, siglen);
400 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
403 unsigned char md[EVP_MAX_MD_SIZE];
405 unsigned int mdlen = 0;
407 EVP_PKEY_CTX *pctx = ctx->pctx;
410 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
411 || pctx->op.sig.sigprovctx == NULL
412 || pctx->op.sig.signature == NULL)
415 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
419 if (pctx == NULL || pctx->pmeth == NULL) {
420 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
424 if (pctx->pmeth->verifyctx != NULL)
428 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
430 r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
432 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
434 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
437 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
438 EVP_MD_CTX_free(tmp_ctx);
442 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
443 sig, siglen, tmp_ctx);
445 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
446 EVP_MD_CTX_free(tmp_ctx);
450 return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
453 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
454 size_t siglen, const unsigned char *tbs, size_t tbslen)
456 if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
457 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
458 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
460 return EVP_DigestVerifyFinal(ctx, sigret, siglen);
462 #endif /* FIPS_MODE */