408 lines
12 KiB
C
408 lines
12 KiB
C
|
/* crypto/evp/digest.c */
|
||
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This package is an SSL implementation written
|
||
|
|
* by Eric Young (eay@cryptsoft.com).
|
||
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
||
|
|
*
|
||
|
|
* This library is free for commercial and non-commercial use as long as
|
||
|
|
* the following conditions are aheared to. The following conditions
|
||
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
||
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
||
|
|
* included with this distribution is covered by the same copyright terms
|
||
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
||
|
|
*
|
||
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
||
|
|
* the code are not to be removed.
|
||
|
|
* If this package is used in a product, Eric Young should be given attribution
|
||
|
|
* as the author of the parts of the library used.
|
||
|
|
* This can be in the form of a textual message at program startup or
|
||
|
|
* in documentation (online or textual) provided with the package.
|
||
|
|
*
|
||
|
|
* 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 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 acknowledgement:
|
||
|
|
* "This product includes cryptographic software written by
|
||
|
|
* Eric Young (eay@cryptsoft.com)"
|
||
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
||
|
|
* being used are not cryptographic related :-).
|
||
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
||
|
|
* the apps directory (application code) you must include an acknowledgement:
|
||
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
|
||
|
|
* ANY EXPRESS 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 AUTHOR OR 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.
|
||
|
|
*
|
||
|
|
* The licence and distribution terms for any publically available version or
|
||
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
||
|
|
* copied and put under another distribution licence
|
||
|
|
* [including the GNU Public Licence.]
|
||
|
|
*/
|
||
|
|
/* ====================================================================
|
||
|
|
* Copyright (c) 1998-2001 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
|
||
|
|
* openssl-core@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/objects.h>
|
||
|
|
#include <openssl/evp.h>
|
||
|
|
#ifndef OPENSSL_NO_ENGINE
|
||
|
|
#include <openssl/engine.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef OPENSSL_FIPS
|
||
|
|
#include <openssl/fips.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
|
||
|
|
{
|
||
|
|
memset(ctx,'\0',sizeof *ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
EVP_MD_CTX *EVP_MD_CTX_create(void)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
|
||
|
|
|
||
|
|
if (ctx)
|
||
|
|
EVP_MD_CTX_init(ctx);
|
||
|
|
|
||
|
|
return ctx;
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX_init(ctx);
|
||
|
|
return EVP_DigestInit_ex(ctx, type, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
|
||
|
|
#ifndef OPENSSL_NO_ENGINE
|
||
|
|
/* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
|
||
|
|
* so this context may already have an ENGINE! Try to avoid releasing
|
||
|
|
* the previous handle, re-querying for an ENGINE, and having a
|
||
|
|
* reinitialisation, when it may all be unecessary. */
|
||
|
|
if (ctx->engine && ctx->digest && (!type ||
|
||
|
|
(type && (type->type == ctx->digest->type))))
|
||
|
|
goto skip_to_init;
|
||
|
|
if (type)
|
||
|
|
{
|
||
|
|
/* Ensure an ENGINE left lying around from last time is cleared
|
||
|
|
* (the previous check attempted to avoid this if the same
|
||
|
|
* ENGINE and EVP_MD could be used). */
|
||
|
|
if(ctx->engine)
|
||
|
|
ENGINE_finish(ctx->engine);
|
||
|
|
if(impl)
|
||
|
|
{
|
||
|
|
if (!ENGINE_init(impl))
|
||
|
|
{
|
||
|
|
EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
/* Ask if an ENGINE is reserved for this job */
|
||
|
|
impl = ENGINE_get_digest_engine(type->type);
|
||
|
|
if(impl)
|
||
|
|
{
|
||
|
|
/* There's an ENGINE for this job ... (apparently) */
|
||
|
|
const EVP_MD *d = ENGINE_get_digest(impl, type->type);
|
||
|
|
if(!d)
|
||
|
|
{
|
||
|
|
/* Same comment from evp_enc.c */
|
||
|
|
EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR);
|
||
|
|
ENGINE_finish(impl);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
/* We'll use the ENGINE's private digest definition */
|
||
|
|
type = d;
|
||
|
|
/* Store the ENGINE functional reference so we know
|
||
|
|
* 'type' came from an ENGINE and we need to release
|
||
|
|
* it when done. */
|
||
|
|
ctx->engine = impl;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
ctx->engine = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(!ctx->digest)
|
||
|
|
{
|
||
|
|
EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_NO_DIGEST_SET);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
if (ctx->digest != type)
|
||
|
|
{
|
||
|
|
if (ctx->digest && ctx->digest->ctx_size)
|
||
|
|
OPENSSL_free(ctx->md_data);
|
||
|
|
ctx->digest=type;
|
||
|
|
if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size)
|
||
|
|
{
|
||
|
|
ctx->update = type->update;
|
||
|
|
ctx->md_data=OPENSSL_malloc(type->ctx_size);
|
||
|
|
if (ctx->md_data == NULL)
|
||
|
|
{
|
||
|
|
EVPerr(EVP_F_EVP_DIGESTINIT_EX,
|
||
|
|
ERR_R_MALLOC_FAILURE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#ifndef OPENSSL_NO_ENGINE
|
||
|
|
skip_to_init:
|
||
|
|
#endif
|
||
|
|
if (ctx->pctx)
|
||
|
|
{
|
||
|
|
int r;
|
||
|
|
r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
|
||
|
|
EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
|
||
|
|
if (r <= 0 && (r != -2))
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
|
||
|
|
return 1;
|
||
|
|
#ifdef OPENSSL_FIPS
|
||
|
|
if (FIPS_mode())
|
||
|
|
{
|
||
|
|
if (FIPS_digestinit(ctx, type))
|
||
|
|
return 1;
|
||
|
|
OPENSSL_free(ctx->md_data);
|
||
|
|
ctx->md_data = NULL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
return ctx->digest->init(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
|
||
|
|
{
|
||
|
|
#ifdef OPENSSL_FIPS
|
||
|
|
return FIPS_digestupdate(ctx, data, count);
|
||
|
|
#else
|
||
|
|
return ctx->update(ctx,data,count);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The caller can assume that this removes any secret data from the context */
|
||
|
|
int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
ret = EVP_DigestFinal_ex(ctx, md, size);
|
||
|
|
EVP_MD_CTX_cleanup(ctx);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The caller can assume that this removes any secret data from the context */
|
||
|
|
int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
|
||
|
|
{
|
||
|
|
#ifdef OPENSSL_FIPS
|
||
|
|
return FIPS_digestfinal(ctx, md, size);
|
||
|
|
#else
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
|
||
|
|
ret=ctx->digest->final(ctx,md);
|
||
|
|
if (size != NULL)
|
||
|
|
*size=ctx->digest->md_size;
|
||
|
|
if (ctx->digest->cleanup)
|
||
|
|
{
|
||
|
|
ctx->digest->cleanup(ctx);
|
||
|
|
EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
|
||
|
|
}
|
||
|
|
memset(ctx->md_data,0,ctx->digest->ctx_size);
|
||
|
|
return ret;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX_init(out);
|
||
|
|
return EVP_MD_CTX_copy_ex(out, in);
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
|
||
|
|
{
|
||
|
|
unsigned char *tmp_buf;
|
||
|
|
if ((in == NULL) || (in->digest == NULL))
|
||
|
|
{
|
||
|
|
EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,EVP_R_INPUT_NOT_INITIALIZED);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#ifndef OPENSSL_NO_ENGINE
|
||
|
|
/* Make sure it's safe to copy a digest context using an ENGINE */
|
||
|
|
if (in->engine && !ENGINE_init(in->engine))
|
||
|
|
{
|
||
|
|
EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_ENGINE_LIB);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (out->digest == in->digest)
|
||
|
|
{
|
||
|
|
tmp_buf = out->md_data;
|
||
|
|
EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE);
|
||
|
|
}
|
||
|
|
else tmp_buf = NULL;
|
||
|
|
EVP_MD_CTX_cleanup(out);
|
||
|
|
memcpy(out,in,sizeof *out);
|
||
|
|
|
||
|
|
if (in->md_data && out->digest->ctx_size)
|
||
|
|
{
|
||
|
|
if (tmp_buf)
|
||
|
|
out->md_data = tmp_buf;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
out->md_data=OPENSSL_malloc(out->digest->ctx_size);
|
||
|
|
if (!out->md_data)
|
||
|
|
{
|
||
|
|
EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_MALLOC_FAILURE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
memcpy(out->md_data,in->md_data,out->digest->ctx_size);
|
||
|
|
}
|
||
|
|
|
||
|
|
out->update = in->update;
|
||
|
|
|
||
|
|
if (in->pctx)
|
||
|
|
{
|
||
|
|
out->pctx = EVP_PKEY_CTX_dup(in->pctx);
|
||
|
|
if (!out->pctx)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX_cleanup(out);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (out->digest->copy)
|
||
|
|
return out->digest->copy(out,in);
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_Digest(const void *data, size_t count,
|
||
|
|
unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX ctx;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
EVP_MD_CTX_init(&ctx);
|
||
|
|
EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT);
|
||
|
|
ret=EVP_DigestInit_ex(&ctx, type, impl)
|
||
|
|
&& EVP_DigestUpdate(&ctx, data, count)
|
||
|
|
&& EVP_DigestFinal_ex(&ctx, md, size);
|
||
|
|
EVP_MD_CTX_cleanup(&ctx);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
|
||
|
|
{
|
||
|
|
if (ctx)
|
||
|
|
{
|
||
|
|
EVP_MD_CTX_cleanup(ctx);
|
||
|
|
OPENSSL_free(ctx);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This call frees resources associated with the context */
|
||
|
|
int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
|
||
|
|
{
|
||
|
|
#ifndef OPENSSL_FIPS
|
||
|
|
/* Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
|
||
|
|
* because sometimes only copies of the context are ever finalised.
|
||
|
|
*/
|
||
|
|
if (ctx->digest && ctx->digest->cleanup
|
||
|
|
&& !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED))
|
||
|
|
ctx->digest->cleanup(ctx);
|
||
|
|
if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
|
||
|
|
&& !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))
|
||
|
|
{
|
||
|
|
OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);
|
||
|
|
OPENSSL_free(ctx->md_data);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
if (ctx->pctx)
|
||
|
|
EVP_PKEY_CTX_free(ctx->pctx);
|
||
|
|
#ifndef OPENSSL_NO_ENGINE
|
||
|
|
if(ctx->engine)
|
||
|
|
/* The EVP_MD we used belongs to an ENGINE, release the
|
||
|
|
* functional reference we held for this reason. */
|
||
|
|
ENGINE_finish(ctx->engine);
|
||
|
|
#endif
|
||
|
|
#ifdef OPENSSL_FIPS
|
||
|
|
FIPS_md_ctx_cleanup(ctx);
|
||
|
|
#endif
|
||
|
|
memset(ctx,'\0',sizeof *ctx);
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|