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;
37 if (ctx->provctx != NULL) {
38 if (!ossl_assert(ctx->digest != NULL)) {
39 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
42 if (ctx->digest->freectx != NULL)
43 ctx->digest->freectx(ctx->provctx);
47 if (ctx->pctx == NULL)
48 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
49 if (ctx->pctx == NULL)
53 evp_pkey_ctx_free_old_ops(locpctx);
55 if (locpctx->keytype == NULL)
60 mdname = EVP_MD_name(type);
61 } else if (pkey != NULL) {
63 * TODO(v3.0) work out a better way for EVP_PKEYs with no legacy
66 if (pkey->pkey.ptr != NULL) {
68 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
69 mdname = OBJ_nid2sn(def_nid);
74 if (locpctx->keymgmt == NULL)
75 locpctx->keymgmt = EVP_KEYMGMT_fetch(locpctx->libctx, locpctx->keytype,
77 if (locpctx->keymgmt != NULL) {
78 const char *supported_sig = NULL;
80 if (locpctx->keymgmt->query_operation_name != NULL)
82 locpctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
85 * If we didn't get a supported sig, assume there is one with the
86 * same name as the key type.
88 if (supported_sig == NULL)
89 supported_sig = locpctx->keytype;
92 * Because we cleared out old ops, we shouldn't need to worry about
93 * checking if signature is already there.
95 signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
99 if (locpctx->keymgmt == NULL
101 || (EVP_KEYMGMT_provider(locpctx->keymgmt)
102 != EVP_SIGNATURE_provider(signature))) {
104 * We don't have the full support we need with provided methods,
105 * let's go see if legacy does. Also, we don't need to free
106 * ctx->keymgmt here, as it's not necessarily tied to this
107 * operation. It will be freed by EVP_PKEY_CTX_free().
109 EVP_SIGNATURE_free(signature);
113 /* No more legacy from here down to legacy: */
115 locpctx->op.sig.signature = signature;
118 evp_keymgmt_export_to_provider(locpctx->pkey, locpctx->keymgmt, 0);
119 /* If export failed, legacy may be able to pick it up */
123 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
124 : EVP_PKEY_OP_SIGNCTX;
126 locpctx->op.sig.sigprovctx
127 = signature->newctx(ossl_provider_ctx(signature->prov));
128 if (locpctx->op.sig.sigprovctx == NULL) {
129 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
133 ctx->reqdigest = type;
136 * This might be requested by a later call to EVP_MD_CTX_md(). In that
137 * case the "explicit fetch" rules apply for that function (as per
138 * man pages), i.e. the ref count is not updated so the EVP_MD should
139 * not be used beyound the lifetime of the EVP_MD_CTX.
141 ctx->reqdigest = ctx->fetched_digest =
142 EVP_MD_fetch(locpctx->libctx, mdname, props);
146 if (signature->digest_verify_init == NULL) {
147 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
150 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
151 mdname, props, provkey);
153 if (signature->digest_sign_init == NULL) {
154 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
157 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
158 mdname, props, provkey);
163 evp_pkey_ctx_free_old_ops(locpctx);
164 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
168 if (ctx->pctx->pmeth == NULL) {
169 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
173 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
177 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
178 type = EVP_get_digestbynid(def_nid);
182 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
188 if (ctx->pctx->pmeth->verifyctx_init) {
189 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
191 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
192 } else if (ctx->pctx->pmeth->digestverify != 0) {
193 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
194 ctx->update = update;
195 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
199 if (ctx->pctx->pmeth->signctx_init) {
200 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
202 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
203 } else if (ctx->pctx->pmeth->digestsign != 0) {
204 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
205 ctx->update = update;
206 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
210 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
214 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
216 if (!EVP_DigestInit_ex(ctx, type, e))
219 * This indicates the current algorithm requires
220 * special treatment before hashing the tbs-message.
222 if (ctx->pctx->pmeth->digest_custom != NULL)
223 return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
228 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
229 const char *mdname, const char *props, EVP_PKEY *pkey)
231 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 0);
234 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
235 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
237 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 0);
240 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
241 const char *mdname, const char *props,
244 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 1);
247 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
248 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
250 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 1);
252 #endif /* FIPS_MDOE */
254 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
256 EVP_PKEY_CTX *pctx = ctx->pctx;
259 || pctx->operation != EVP_PKEY_OP_SIGNCTX
260 || pctx->op.sig.sigprovctx == NULL
261 || pctx->op.sig.signature == NULL)
264 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
268 return EVP_DigestUpdate(ctx, data, dsize);
271 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
273 EVP_PKEY_CTX *pctx = ctx->pctx;
276 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
277 || pctx->op.sig.sigprovctx == NULL
278 || pctx->op.sig.signature == NULL)
281 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
285 return EVP_DigestUpdate(ctx, data, dsize);
289 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
293 EVP_PKEY_CTX *pctx = ctx->pctx;
296 || pctx->operation != EVP_PKEY_OP_SIGNCTX
297 || pctx->op.sig.sigprovctx == NULL
298 || pctx->op.sig.signature == NULL)
301 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
302 sigret, siglen, SIZE_MAX);
305 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
307 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
308 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
309 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
311 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
314 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
315 EVP_PKEY_CTX_free(dctx);
319 if (pctx->pmeth->signctx)
324 unsigned char md[EVP_MAX_MD_SIZE];
325 unsigned int mdlen = 0;
326 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
328 r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
330 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
332 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
335 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
336 EVP_MD_CTX_free(tmp_ctx);
340 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
341 sigret, siglen, tmp_ctx);
343 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
344 EVP_MD_CTX_free(tmp_ctx);
348 if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
352 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
355 int s = EVP_MD_size(ctx->digest);
356 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
363 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
364 const unsigned char *tbs, size_t tbslen)
366 if (ctx->pctx->pmeth->digestsign != NULL)
367 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
368 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
370 return EVP_DigestSignFinal(ctx, sigret, siglen);
373 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
376 unsigned char md[EVP_MAX_MD_SIZE];
378 unsigned int mdlen = 0;
380 EVP_PKEY_CTX *pctx = ctx->pctx;
383 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
384 || pctx->op.sig.sigprovctx == NULL
385 || pctx->op.sig.signature == NULL)
388 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
392 if (ctx->pctx->pmeth->verifyctx)
396 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
398 r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
400 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
402 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
405 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
406 EVP_MD_CTX_free(tmp_ctx);
410 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
411 sig, siglen, tmp_ctx);
413 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
414 EVP_MD_CTX_free(tmp_ctx);
418 return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
421 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
422 size_t siglen, const unsigned char *tbs, size_t tbslen)
424 if (ctx->pctx->pmeth->digestverify != NULL)
425 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
426 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
428 return EVP_DigestVerifyFinal(ctx, sigret, siglen);
430 #endif /* FIPS_MODE */