diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2006-05-24 17:30:09 +0000 |
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committer | Dr. Stephen Henson <steve@openssl.org> | 2006-05-24 17:30:09 +0000 |
commit | 91c9e62123febf74866fa17983e6068ab4962bd7 (patch) | |
tree | fc0c2f965f03b6c6315fb40c9e4915c028f3a93e /crypto/evp/m_sigver.c | |
parent | 0e3453536ec9ce09e4dd276c2fa4d62e362789e9 (diff) |
New functions for enchanced digest sign/verify.
Diffstat (limited to 'crypto/evp/m_sigver.c')
-rw-r--r-- | crypto/evp/m_sigver.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/crypto/evp/m_sigver.c b/crypto/evp/m_sigver.c new file mode 100644 index 0000000000..95382118b2 --- /dev/null +++ b/crypto/evp/m_sigver.c @@ -0,0 +1,142 @@ +/* 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); + } |