2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2006,2007 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/evp.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
66 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
67 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
70 if (ctx->pctx == NULL)
71 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
72 if (ctx->pctx == NULL)
75 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM))
81 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
82 type = EVP_get_digestbynid(def_nid);
87 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
94 if (ctx->pctx->pmeth->verifyctx_init)
96 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <=0)
98 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
100 else if (EVP_PKEY_verify_init(ctx->pctx) <= 0)
105 if (ctx->pctx->pmeth->signctx_init)
107 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
109 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
111 else if (EVP_PKEY_sign_init(ctx->pctx) <= 0)
114 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
116 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
118 if (!EVP_DigestInit_ex(ctx, type, e))
123 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
124 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
126 return do_sigver_init(ctx, pctx, type, e, pkey, 0);
129 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
130 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
132 return do_sigver_init(ctx, pctx, type, e, pkey, 1);
135 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen)
138 EVP_PKEY_CTX *pctx = ctx->pctx;
139 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
143 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
144 dctx = EVP_PKEY_CTX_dup(ctx->pctx);
147 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
148 EVP_PKEY_CTX_free(dctx);
151 if (pctx->pmeth->signctx)
158 unsigned char md[EVP_MAX_MD_SIZE];
160 EVP_MD_CTX_init(&tmp_ctx);
161 if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx))
164 r = tmp_ctx.pctx->pmeth->signctx(tmp_ctx.pctx,
165 sigret, siglen, &tmp_ctx);
167 r = EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen);
168 EVP_MD_CTX_cleanup(&tmp_ctx);
171 if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
178 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
183 int s = EVP_MD_size(ctx->digest);
184 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
191 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
195 unsigned char md[EVP_MAX_MD_SIZE];
200 if (ctx->pctx->pmeth->verifyctx)
204 EVP_MD_CTX_init(&tmp_ctx);
205 if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx))
209 r = tmp_ctx.pctx->pmeth->verifyctx(tmp_ctx.pctx,
210 sig, siglen, &tmp_ctx);
213 r = EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen);
214 EVP_MD_CTX_cleanup(&tmp_ctx);
217 return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);