3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2006,2007 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/evp.h>
63 #include <openssl/objects.h>
64 #include <openssl/x509.h>
67 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
68 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
71 if (ctx->pctx == NULL)
72 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
73 if (ctx->pctx == NULL)
76 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
80 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
81 type = EVP_get_digestbynid(def_nid);
85 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
91 if (ctx->pctx->pmeth->verifyctx_init) {
92 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
94 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
95 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0)
98 if (ctx->pctx->pmeth->signctx_init) {
99 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
101 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
102 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0)
105 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
109 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
111 if (!EVP_DigestInit_ex(ctx, type, e))
116 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
117 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
119 return do_sigver_init(ctx, pctx, type, e, pkey, 0);
122 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
123 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
125 return do_sigver_init(ctx, pctx, type, e, pkey, 1);
128 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
132 EVP_PKEY_CTX *pctx = ctx->pctx;
133 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
136 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
137 dctx = EVP_PKEY_CTX_dup(ctx->pctx);
140 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
141 EVP_PKEY_CTX_free(dctx);
144 if (pctx->pmeth->signctx)
150 unsigned char md[EVP_MAX_MD_SIZE];
152 EVP_MD_CTX_init(&tmp_ctx);
153 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx))
156 r = tmp_ctx.pctx->pmeth->signctx(tmp_ctx.pctx,
157 sigret, siglen, &tmp_ctx);
159 r = EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen);
160 EVP_MD_CTX_cleanup(&tmp_ctx);
163 if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
167 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
170 int s = EVP_MD_size(ctx->digest);
171 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
178 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
182 unsigned char md[EVP_MAX_MD_SIZE];
187 if (ctx->pctx->pmeth->verifyctx)
191 EVP_MD_CTX_init(&tmp_ctx);
192 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx))
195 r = tmp_ctx.pctx->pmeth->verifyctx(tmp_ctx.pctx,
196 sig, siglen, &tmp_ctx);
198 r = EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen);
199 EVP_MD_CTX_cleanup(&tmp_ctx);
202 return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);