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
);
57 if (locpctx
->keytype
== NULL
)
62 mdname
= EVP_MD_name(type
);
63 } else if (pkey
!= NULL
) {
65 * TODO(v3.0) work out a better way for EVP_PKEYs with no legacy
68 if (pkey
->pkey
.ptr
!= NULL
) {
70 if (EVP_PKEY_get_default_digest_nid(pkey
, &def_nid
) > 0)
71 mdname
= OBJ_nid2sn(def_nid
);
76 /* Ensure that the key is provided. If not, go legacy */
77 tmp_keymgmt
= locpctx
->keymgmt
;
78 provkey
= evp_pkey_make_provided(locpctx
->pkey
, locpctx
->libctx
,
79 &tmp_keymgmt
, locpctx
->propquery
, 0);
82 if (!EVP_KEYMGMT_up_ref(tmp_keymgmt
)) {
83 ERR_raise(ERR_LIB_EVP
, EVP_R_INITIALIZATION_ERROR
);
86 EVP_KEYMGMT_free(locpctx
->keymgmt
);
87 locpctx
->keymgmt
= tmp_keymgmt
;
89 if (locpctx
->keymgmt
->query_operation_name
!= NULL
)
91 locpctx
->keymgmt
->query_operation_name(OSSL_OP_SIGNATURE
);
94 * If we didn't get a supported sig, assume there is one with the
95 * same name as the key type.
97 if (supported_sig
== NULL
)
98 supported_sig
= locpctx
->keytype
;
101 * Because we cleared out old ops, we shouldn't need to worry about
102 * checking if signature is already there.
104 signature
= EVP_SIGNATURE_fetch(locpctx
->libctx
, supported_sig
,
107 if (signature
== NULL
108 || (EVP_KEYMGMT_provider(locpctx
->keymgmt
)
109 != EVP_SIGNATURE_provider(signature
))) {
111 * We don't have the full support we need with provided methods,
112 * let's go see if legacy does. Also, we don't need to free
113 * ctx->keymgmt here, as it's not necessarily tied to this
114 * operation. It will be freed by EVP_PKEY_CTX_free().
116 EVP_SIGNATURE_free(signature
);
120 /* 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
;
135 * This might be requested by a later call to EVP_MD_CTX_md(). In that
136 * case the "explicit fetch" rules apply for that function (as per
137 * man pages), i.e. the ref count is not updated so the EVP_MD should
138 * not be used beyound the lifetime of the EVP_MD_CTX.
140 ctx
->reqdigest
= ctx
->fetched_digest
=
141 EVP_MD_fetch(locpctx
->libctx
, mdname
, props
);
145 if (signature
->digest_verify_init
== NULL
) {
146 ERR_raise(ERR_LIB_EVP
, EVP_R_INITIALIZATION_ERROR
);
149 ret
= signature
->digest_verify_init(locpctx
->op
.sig
.sigprovctx
,
150 mdname
, props
, provkey
);
152 if (signature
->digest_sign_init
== NULL
) {
153 ERR_raise(ERR_LIB_EVP
, EVP_R_INITIALIZATION_ERROR
);
156 ret
= signature
->digest_sign_init(locpctx
->op
.sig
.sigprovctx
,
157 mdname
, props
, provkey
);
162 evp_pkey_ctx_free_old_ops(locpctx
);
163 locpctx
->operation
= EVP_PKEY_OP_UNDEFINED
;
167 if (ctx
->pctx
->pmeth
== NULL
) {
168 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE
);
172 if (!(ctx
->pctx
->pmeth
->flags
& EVP_PKEY_FLAG_SIGCTX_CUSTOM
)) {
176 if (EVP_PKEY_get_default_digest_nid(pkey
, &def_nid
) > 0)
177 type
= EVP_get_digestbynid(def_nid
);
181 EVPerr(EVP_F_DO_SIGVER_INIT
, EVP_R_NO_DEFAULT_DIGEST
);
187 if (ctx
->pctx
->pmeth
->verifyctx_init
) {
188 if (ctx
->pctx
->pmeth
->verifyctx_init(ctx
->pctx
, ctx
) <= 0)
190 ctx
->pctx
->operation
= EVP_PKEY_OP_VERIFYCTX
;
191 } else if (ctx
->pctx
->pmeth
->digestverify
!= 0) {
192 ctx
->pctx
->operation
= EVP_PKEY_OP_VERIFY
;
193 ctx
->update
= update
;
194 } else if (EVP_PKEY_verify_init(ctx
->pctx
) <= 0) {
198 if (ctx
->pctx
->pmeth
->signctx_init
) {
199 if (ctx
->pctx
->pmeth
->signctx_init(ctx
->pctx
, ctx
) <= 0)
201 ctx
->pctx
->operation
= EVP_PKEY_OP_SIGNCTX
;
202 } else if (ctx
->pctx
->pmeth
->digestsign
!= 0) {
203 ctx
->pctx
->operation
= EVP_PKEY_OP_SIGN
;
204 ctx
->update
= update
;
205 } else if (EVP_PKEY_sign_init(ctx
->pctx
) <= 0) {
209 if (EVP_PKEY_CTX_set_signature_md(ctx
->pctx
, type
) <= 0)
213 if (ctx
->pctx
->pmeth
->flags
& EVP_PKEY_FLAG_SIGCTX_CUSTOM
)
215 if (!EVP_DigestInit_ex(ctx
, type
, e
))
218 * This indicates the current algorithm requires
219 * special treatment before hashing the tbs-message.
221 if (ctx
->pctx
->pmeth
->digest_custom
!= NULL
)
222 return ctx
->pctx
->pmeth
->digest_custom(ctx
->pctx
, ctx
);
227 int EVP_DigestSignInit_ex(EVP_MD_CTX
*ctx
, EVP_PKEY_CTX
**pctx
,
228 const char *mdname
, const char *props
, EVP_PKEY
*pkey
)
230 return do_sigver_init(ctx
, pctx
, NULL
, mdname
, props
, NULL
, pkey
, 0);
233 int EVP_DigestSignInit(EVP_MD_CTX
*ctx
, EVP_PKEY_CTX
**pctx
,
234 const EVP_MD
*type
, ENGINE
*e
, EVP_PKEY
*pkey
)
236 return do_sigver_init(ctx
, pctx
, type
, NULL
, NULL
, e
, pkey
, 0);
239 int EVP_DigestVerifyInit_ex(EVP_MD_CTX
*ctx
, EVP_PKEY_CTX
**pctx
,
240 const char *mdname
, const char *props
,
243 return do_sigver_init(ctx
, pctx
, NULL
, mdname
, props
, NULL
, pkey
, 1);
246 int EVP_DigestVerifyInit(EVP_MD_CTX
*ctx
, EVP_PKEY_CTX
**pctx
,
247 const EVP_MD
*type
, ENGINE
*e
, EVP_PKEY
*pkey
)
249 return do_sigver_init(ctx
, pctx
, type
, NULL
, NULL
, e
, pkey
, 1);
251 #endif /* FIPS_MDOE */
253 int EVP_DigestSignUpdate(EVP_MD_CTX
*ctx
, const void *data
, size_t dsize
)
255 EVP_PKEY_CTX
*pctx
= ctx
->pctx
;
258 || pctx
->operation
!= EVP_PKEY_OP_SIGNCTX
259 || pctx
->op
.sig
.sigprovctx
== NULL
260 || pctx
->op
.sig
.signature
== NULL
)
263 return pctx
->op
.sig
.signature
->digest_sign_update(pctx
->op
.sig
.sigprovctx
,
267 return EVP_DigestUpdate(ctx
, data
, dsize
);
270 int EVP_DigestVerifyUpdate(EVP_MD_CTX
*ctx
, const void *data
, size_t dsize
)
272 EVP_PKEY_CTX
*pctx
= ctx
->pctx
;
275 || pctx
->operation
!= EVP_PKEY_OP_VERIFYCTX
276 || pctx
->op
.sig
.sigprovctx
== NULL
277 || pctx
->op
.sig
.signature
== NULL
)
280 return pctx
->op
.sig
.signature
->digest_verify_update(pctx
->op
.sig
.sigprovctx
,
284 return EVP_DigestUpdate(ctx
, data
, dsize
);
288 int EVP_DigestSignFinal(EVP_MD_CTX
*ctx
, unsigned char *sigret
,
292 EVP_PKEY_CTX
*pctx
= ctx
->pctx
;
295 || pctx
->operation
!= EVP_PKEY_OP_SIGNCTX
296 || pctx
->op
.sig
.sigprovctx
== NULL
297 || pctx
->op
.sig
.signature
== NULL
)
300 return pctx
->op
.sig
.signature
->digest_sign_final(pctx
->op
.sig
.sigprovctx
,
301 sigret
, siglen
, SIZE_MAX
);
304 if (pctx
== NULL
|| pctx
->pmeth
== NULL
) {
305 ERR_raise(ERR_LIB_EVP
, EVP_R_INITIALIZATION_ERROR
);
309 if (pctx
->pmeth
->flags
& EVP_PKEY_FLAG_SIGCTX_CUSTOM
) {
311 return pctx
->pmeth
->signctx(pctx
, sigret
, siglen
, ctx
);
312 if (ctx
->flags
& EVP_MD_CTX_FLAG_FINALISE
)
313 r
= pctx
->pmeth
->signctx(pctx
, sigret
, siglen
, ctx
);
315 EVP_PKEY_CTX
*dctx
= EVP_PKEY_CTX_dup(pctx
);
319 r
= dctx
->pmeth
->signctx(dctx
, sigret
, siglen
, ctx
);
320 EVP_PKEY_CTX_free(dctx
);
324 if (pctx
->pmeth
->signctx
!= NULL
)
328 if (sigret
!= NULL
) {
329 unsigned char md
[EVP_MAX_MD_SIZE
];
330 unsigned int mdlen
= 0;
332 if (ctx
->flags
& EVP_MD_CTX_FLAG_FINALISE
) {
334 r
= pctx
->pmeth
->signctx(pctx
, sigret
, siglen
, ctx
);
336 r
= EVP_DigestFinal_ex(ctx
, md
, &mdlen
);
338 EVP_MD_CTX
*tmp_ctx
= EVP_MD_CTX_new();
342 if (!EVP_MD_CTX_copy_ex(tmp_ctx
, ctx
)) {
343 EVP_MD_CTX_free(tmp_ctx
);
347 r
= tmp_ctx
->pctx
->pmeth
->signctx(tmp_ctx
->pctx
,
348 sigret
, siglen
, tmp_ctx
);
350 r
= EVP_DigestFinal_ex(tmp_ctx
, md
, &mdlen
);
351 EVP_MD_CTX_free(tmp_ctx
);
355 if (EVP_PKEY_sign(pctx
, sigret
, siglen
, md
, mdlen
) <= 0)
359 if (pctx
->pmeth
->signctx(pctx
, sigret
, siglen
, ctx
) <= 0)
362 int s
= EVP_MD_size(ctx
->digest
);
364 if (s
< 0 || EVP_PKEY_sign(pctx
, sigret
, siglen
, NULL
, s
) <= 0)
371 int EVP_DigestSign(EVP_MD_CTX
*ctx
, unsigned char *sigret
, size_t *siglen
,
372 const unsigned char *tbs
, size_t tbslen
)
374 if (ctx
->pctx
->pmeth
!= NULL
&& ctx
->pctx
->pmeth
->digestsign
!= NULL
)
375 return ctx
->pctx
->pmeth
->digestsign(ctx
, sigret
, siglen
, tbs
, tbslen
);
376 if (sigret
!= NULL
&& EVP_DigestSignUpdate(ctx
, tbs
, tbslen
) <= 0)
378 return EVP_DigestSignFinal(ctx
, sigret
, siglen
);
381 int EVP_DigestVerifyFinal(EVP_MD_CTX
*ctx
, const unsigned char *sig
,
384 unsigned char md
[EVP_MAX_MD_SIZE
];
386 unsigned int mdlen
= 0;
388 EVP_PKEY_CTX
*pctx
= ctx
->pctx
;
391 || pctx
->operation
!= EVP_PKEY_OP_VERIFYCTX
392 || pctx
->op
.sig
.sigprovctx
== NULL
393 || pctx
->op
.sig
.signature
== NULL
)
396 return pctx
->op
.sig
.signature
->digest_verify_final(pctx
->op
.sig
.sigprovctx
,
400 if (pctx
== NULL
|| pctx
->pmeth
== NULL
) {
401 ERR_raise(ERR_LIB_EVP
, EVP_R_INITIALIZATION_ERROR
);
405 if (pctx
->pmeth
->verifyctx
!= NULL
)
409 if (ctx
->flags
& EVP_MD_CTX_FLAG_FINALISE
) {
411 r
= pctx
->pmeth
->verifyctx(pctx
, sig
, siglen
, ctx
);
413 r
= EVP_DigestFinal_ex(ctx
, md
, &mdlen
);
415 EVP_MD_CTX
*tmp_ctx
= EVP_MD_CTX_new();
418 if (!EVP_MD_CTX_copy_ex(tmp_ctx
, ctx
)) {
419 EVP_MD_CTX_free(tmp_ctx
);
423 r
= tmp_ctx
->pctx
->pmeth
->verifyctx(tmp_ctx
->pctx
,
424 sig
, siglen
, tmp_ctx
);
426 r
= EVP_DigestFinal_ex(tmp_ctx
, md
, &mdlen
);
427 EVP_MD_CTX_free(tmp_ctx
);
431 return EVP_PKEY_verify(pctx
, sig
, siglen
, md
, mdlen
);
434 int EVP_DigestVerify(EVP_MD_CTX
*ctx
, const unsigned char *sigret
,
435 size_t siglen
, const unsigned char *tbs
, size_t tbslen
)
437 if (ctx
->pctx
->pmeth
!= NULL
&& ctx
->pctx
->pmeth
->digestverify
!= NULL
)
438 return ctx
->pctx
->pmeth
->digestverify(ctx
, sigret
, siglen
, tbs
, tbslen
);
439 if (EVP_DigestVerifyUpdate(ctx
, tbs
, tbslen
) <= 0)
441 return EVP_DigestVerifyFinal(ctx
, sigret
, siglen
);
443 #endif /* FIPS_MODE */