* 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>
+#include <openssl/engine.h>
void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
{
int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
{
- if(ctx->digest != 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);
+ /* 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)
{
- OPENSSL_free(ctx->md_data);
+ /* 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, 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, EVP_R_INITIALIZATION_ERROR);
+ 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, EVP_R_NO_DIGEST_SET);
+ return 0;
+ }
+ if (ctx->digest != type)
+ {
+ if (ctx->digest && ctx->digest->ctx_size)
+ OPENSSL_free(ctx->md_data);
ctx->digest=type;
- ctx->md_data=OPENSSL_malloc(type->ctx_size);
+ if (type->ctx_size)
+ ctx->md_data=OPENSSL_malloc(type->ctx_size);
}
- return type->init(ctx->md_data);
+skip_to_init:
+ return ctx->digest->init(ctx);
}
int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data,
unsigned int count)
{
- return ctx->digest->update(ctx->md_data,data,(unsigned long)count);
+ return ctx->digest->update(ctx,data,(unsigned long)count);
}
/* 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=ctx->digest->final(md,ctx->md_data);
+ 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)
+ {
+ int ret;
+ ret=ctx->digest->final(ctx,md);
if (size != NULL)
*size=ctx->digest->md_size;
- /* FIXME: add a cleanup function to the ctx? */
+ 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;
}
int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
-{
- if ((in == NULL) || (in->digest == NULL)) {
- EVPerr(EVP_F_EVP_MD_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
- return 0;
- }
- EVP_MD_CTX_cleanup(out);
- memcpy(out,in,sizeof *out);
- out->md_data=OPENSSL_malloc(out->digest->ctx_size);
- /* FIXME: we really need a per-MD copy function */
- memcpy(out->md_data,in->md_data,out->digest->ctx_size);
- return 1;
-}
+ {
+ 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)
+ {
+ if ((in == NULL) || (in->digest == NULL))
+ {
+ EVPerr(EVP_F_EVP_MD_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
+ return 0;
+ }
+ /* 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,ERR_R_ENGINE_LIB);
+ return 0;
+ }
+
+ EVP_MD_CTX_cleanup(out);
+ memcpy(out,in,sizeof *out);
+
+ if (out->digest->ctx_size)
+ {
+ out->md_data=OPENSSL_malloc(out->digest->ctx_size);
+ memcpy(out->md_data,in->md_data,out->digest->ctx_size);
+ }
+
+ if (out->digest->copy)
+ return out->digest->copy(out,in);
+
+ return 1;
+ }
int EVP_Digest(void *data, unsigned int count,
- unsigned char *md, unsigned int *size, const EVP_MD *type)
-{
+ unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
+ {
EVP_MD_CTX ctx;
int ret;
EVP_MD_CTX_init(&ctx);
- ret=EVP_DigestInit(&ctx, type)
+ 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(&ctx, md, size);
+ && EVP_DigestFinal_ex(&ctx, md, size);
EVP_MD_CTX_cleanup(&ctx);
return ret;
-}
+ }
void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
{
/* This call frees resources associated with the context */
int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
{
- /* assume ctx->md_data was cleaned in EVP_Digest_Final */
- OPENSSL_free(ctx->md_data);
+ /* 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)
+ {
+ memset(ctx->md_data,0,ctx->digest->ctx_size);
+ OPENSSL_free(ctx->md_data);
+ }
+ 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);
memset(ctx,'\0',sizeof *ctx);
return 1;
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