2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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 "internal/evp_int.h"
18 static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
20 EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
24 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
25 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
28 if (ctx->pctx == NULL)
29 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
30 if (ctx->pctx == NULL)
33 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
37 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
38 type = EVP_get_digestbynid(def_nid);
42 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
48 if (ctx->pctx->pmeth->verifyctx_init) {
49 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
51 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
52 } else if (ctx->pctx->pmeth->digestverify != 0) {
53 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
55 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
59 if (ctx->pctx->pmeth->signctx_init) {
60 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
62 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
63 } else if (ctx->pctx->pmeth->digestsign != 0) {
64 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
66 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
70 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
74 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
76 if (!EVP_DigestInit_ex(ctx, type, e))
79 * This indicates the current algorithm requires
80 * special treatment before hashing the tbs-message.
82 if (ctx->pctx->pmeth->digest_custom != NULL)
83 return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
88 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
89 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
91 return do_sigver_init(ctx, pctx, type, e, pkey, 0);
94 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
95 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
97 return do_sigver_init(ctx, pctx, type, e, pkey, 1);
100 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
104 EVP_PKEY_CTX *pctx = ctx->pctx;
105 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
107 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
108 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
109 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
111 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
114 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
115 EVP_PKEY_CTX_free(dctx);
119 if (pctx->pmeth->signctx)
124 unsigned char md[EVP_MAX_MD_SIZE];
125 unsigned int mdlen = 0;
126 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
128 r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
130 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
132 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
135 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
136 EVP_MD_CTX_free(tmp_ctx);
140 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
141 sigret, siglen, tmp_ctx);
143 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
144 EVP_MD_CTX_free(tmp_ctx);
148 if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
152 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
155 int s = EVP_MD_size(ctx->digest);
156 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
163 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
164 const unsigned char *tbs, size_t tbslen)
166 if (ctx->pctx->pmeth->digestsign != NULL)
167 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
168 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
170 return EVP_DigestSignFinal(ctx, sigret, siglen);
173 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
176 unsigned char md[EVP_MAX_MD_SIZE];
178 unsigned int mdlen = 0;
181 if (ctx->pctx->pmeth->verifyctx)
185 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
187 r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
189 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
191 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
194 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
195 EVP_MD_CTX_free(tmp_ctx);
199 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
200 sig, siglen, tmp_ctx);
202 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
203 EVP_MD_CTX_free(tmp_ctx);
207 return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
210 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
211 size_t siglen, const unsigned char *tbs, size_t tbslen)
213 if (ctx->pctx->pmeth->digestverify != NULL)
214 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
215 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
217 return EVP_DigestVerifyFinal(ctx, sigret, siglen);