diff options
Diffstat (limited to 'openssl/crypto/evp/m_sigver.c')
| -rw-r--r-- | openssl/crypto/evp/m_sigver.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/openssl/crypto/evp/m_sigver.c b/openssl/crypto/evp/m_sigver.c new file mode 100644 index 000000000..f0b7f9505 --- /dev/null +++ b/openssl/crypto/evp/m_sigver.c @@ -0,0 +1,200 @@ +/* m_sigver.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project 2006. + */ +/* ==================================================================== + * Copyright (c) 2006,2007 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> +#include "evp_locl.h" + +static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, + const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey, + int ver) + { + if (ctx->pctx == NULL) + ctx->pctx = EVP_PKEY_CTX_new(pkey, e); + if (ctx->pctx == NULL) + return 0; + + if (type == NULL) + { + int def_nid; + if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0) + type = EVP_get_digestbynid(def_nid); + } + + if (type == NULL) + { + EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST); + return 0; + } + + if (ver) + { + if (ctx->pctx->pmeth->verifyctx_init) + { + if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <=0) + return 0; + ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX; + } + else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) + return 0; + } + else + { + if (ctx->pctx->pmeth->signctx_init) + { + if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0) + return 0; + ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX; + } + 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; + if (!EVP_DigestInit_ex(ctx, type, e)) + return 0; + 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) + { + int sctx, r = 0; + if (ctx->pctx->pmeth->signctx) + sctx = 1; + else + sctx = 0; + 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 (sctx) + r = tmp_ctx.pctx->pmeth->signctx(tmp_ctx.pctx, + sigret, siglen, &tmp_ctx); + else + r = EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen); + EVP_MD_CTX_cleanup(&tmp_ctx); + if (sctx || !r) + return r; + if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0) + return 0; + } + else + { + if (sctx) + { + if (ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx) <= 0) + return 0; + } + else + { + int s = EVP_MD_size(ctx->digest); + if (s < 0 || EVP_PKEY_sign(ctx->pctx, sigret, siglen, NULL, s) <= 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]; + int r; + unsigned int mdlen; + int vctx; + + if (ctx->pctx->pmeth->verifyctx) + vctx = 1; + else + vctx = 0; + EVP_MD_CTX_init(&tmp_ctx); + if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) + return -1; + if (vctx) + { + r = tmp_ctx.pctx->pmeth->verifyctx(tmp_ctx.pctx, + sig, siglen, &tmp_ctx); + } + else + r = EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen); + EVP_MD_CTX_cleanup(&tmp_ctx); + if (vctx || !r) + return r; + return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen); + } |