1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2006,2007 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com). */
56 #include <openssl/evp.h>
58 #include <openssl/digest.h>
59 #include <openssl/err.h>
62 #include "../digest/internal.h"
65 /* md_begin_digset is a callback from the |EVP_MD_CTX| code that is called when
66 * a new digest is begun. */
67 static int md_begin_digest(EVP_MD_CTX *ctx) {
68 int r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
69 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
70 return r > 0 || r == -2;
73 static const struct evp_md_pctx_ops md_pctx_ops = {
79 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
80 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
82 if (ctx->pctx == NULL) {
83 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
85 if (ctx->pctx == NULL) {
88 ctx->pctx_ops = &md_pctx_ops;
95 OPENSSL_PUT_ERROR(EVP, do_sigver_init, EVP_R_NO_DEFAULT_DIGEST);
100 if (ctx->pctx->pmeth->verifyctx_init) {
101 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0) {
104 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
105 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
109 if (ctx->pctx->pmeth->signctx_init) {
110 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0) {
113 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
114 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
118 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0) {
124 if (!EVP_DigestInit_ex(ctx, type, e)) {
130 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, const EVP_MD *type,
131 ENGINE *e, EVP_PKEY *pkey) {
132 return do_sigver_init(ctx, pctx, type, e, pkey, 0);
135 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
136 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) {
137 return do_sigver_init(ctx, pctx, type, e, pkey, 1);
140 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
141 return EVP_DigestUpdate(ctx, data, len);
144 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
145 return EVP_DigestUpdate(ctx, data, len);
148 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, uint8_t *out_sig,
149 size_t *out_sig_len) {
151 const int has_signctx = ctx->pctx->pmeth->signctx != NULL;
155 uint8_t md[EVP_MAX_MD_SIZE];
158 EVP_MD_CTX_init(&tmp_ctx);
159 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx)) {
163 r = tmp_ctx.pctx->pmeth->signctx(tmp_ctx.pctx, out_sig, out_sig_len, &tmp_ctx);
165 r = EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen);
167 EVP_MD_CTX_cleanup(&tmp_ctx);
168 if (has_signctx || !r) {
171 if (EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, md, mdlen) <= 0) {
176 if (ctx->pctx->pmeth->signctx(ctx->pctx, out_sig, out_sig_len, ctx) <= 0) {
180 size_t s = EVP_MD_size(ctx->digest);
181 if (EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, NULL, s) <= 0) {
189 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig,
192 uint8_t md[EVP_MAX_MD_SIZE];
195 const int has_verifyctx = ctx->pctx->pmeth->verifyctx != NULL;
197 EVP_MD_CTX_init(&tmp_ctx);
198 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx)) {
202 r = tmp_ctx.pctx->pmeth->verifyctx(tmp_ctx.pctx, sig, sig_len, &tmp_ctx);
204 r = EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen);
207 EVP_MD_CTX_cleanup(&tmp_ctx);
208 if (has_verifyctx || !r) {
211 return EVP_PKEY_verify(ctx->pctx, sig, sig_len, md, mdlen);