| /* m_sigver.c */ |
| /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL |
| * project 2006. |
| */ |
| /* ==================================================================== |
| * Copyright (c) 2006 The OpenSSL Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * licensing@OpenSSL.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). |
| * |
| */ |
| |
| #include <stdio.h> |
| #include "cryptlib.h" |
| #include <openssl/evp.h> |
| #include <openssl/objects.h> |
| #include <openssl/x509.h> |
| |
| int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, |
| const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey, int ver) |
| { |
| if (!EVP_DigestInit_ex(ctx, type, e)) |
| return 0; |
| if (ctx->pctx == NULL) |
| ctx->pctx = EVP_PKEY_CTX_new(pkey, e); |
| if (ctx->pctx == NULL) |
| return 0; |
| if (ver) |
| { |
| if (EVP_PKEY_verify_init(ctx->pctx) <= 0) |
| return 0; |
| } |
| else |
| { |
| if (EVP_PKEY_sign_init(ctx->pctx) <= 0) |
| return 0; |
| } |
| if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0) |
| return 0; |
| if (pctx) |
| *pctx = ctx->pctx; |
| return 1; |
| } |
| |
| int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, |
| const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) |
| { |
| return do_sigver_init(ctx, pctx, type, e, pkey, 0); |
| } |
| |
| int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, |
| const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) |
| { |
| return do_sigver_init(ctx, pctx, type, e, pkey, 1); |
| } |
| |
| |
| int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen) |
| { |
| |
| if (sigret) |
| { |
| MS_STATIC EVP_MD_CTX tmp_ctx; |
| unsigned char md[EVP_MAX_MD_SIZE]; |
| unsigned int mdlen; |
| EVP_MD_CTX_init(&tmp_ctx); |
| if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) |
| return 0; |
| if (!EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen)) |
| return 0; |
| EVP_MD_CTX_cleanup(&tmp_ctx); |
| if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0) |
| return 0; |
| } |
| else |
| { |
| if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, NULL, |
| EVP_MD_size(ctx->digest)) <= 0) |
| return 0; |
| } |
| return 1; |
| } |
| |
| int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, unsigned char *sig, size_t siglen) |
| { |
| MS_STATIC EVP_MD_CTX tmp_ctx; |
| unsigned char md[EVP_MAX_MD_SIZE]; |
| unsigned int mdlen; |
| EVP_MD_CTX_init(&tmp_ctx); |
| if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) |
| return -1; |
| if (!EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen)) |
| return -1; |
| EVP_MD_CTX_cleanup(&tmp_ctx); |
| return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen); |
| } |