--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/evp/digest.c	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,353 @@
+/* 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
+
+EXPORT_C void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
+	{
+	memset(ctx,'\0',sizeof *ctx);
+	}
+
+EXPORT_C EVP_MD_CTX *EVP_MD_CTX_create(void)
+	{
+	EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
+    if(ctx==NULL)
+	{
+	   return ctx;
+	}
+	EVP_MD_CTX_init(ctx);
+
+	return ctx;
+	}
+
+EXPORT_C int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
+	{
+	EVP_MD_CTX_init(ctx);
+	return EVP_DigestInit_ex(ctx, type, NULL);
+	}
+
+EXPORT_C 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);
+				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)
+		  { if(ctx->md_data)
+			  OPENSSL_free(ctx->md_data);
+		  }
+		ctx->digest=type;
+		if (type->ctx_size)
+		{
+			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
+	return ctx->digest->init(ctx);
+	}
+
+EXPORT_C int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data,
+	     size_t count)
+	{
+	return ctx->digest->update(ctx,data,count);
+	}
+
+/* The caller can assume that this removes any secret data from the context */
+EXPORT_C 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 */
+EXPORT_C int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
+	{
+	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);
+		}
+	if(ctx->md_data)	
+	memset(ctx->md_data,0,ctx->digest->ctx_size);
+	return ret;
+	}
+
+EXPORT_C 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);
+	}
+
+EXPORT_C 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 (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==NULL||in->md_data==NULL)
+        {
+           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);
+		}
+
+	if (out->digest->copy)
+		return out->digest->copy(out,in);
+	
+	return 1;
+	}
+
+EXPORT_C 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;
+	}
+
+EXPORT_C void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
+	{
+	EVP_MD_CTX_cleanup(ctx);
+	OPENSSL_free(ctx);
+	}
+
+/* This call frees resources associated with the context */
+EXPORT_C int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
+	{
+	/* 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);
+		}
+#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
+	memset(ctx,'\0',sizeof *ctx);
+
+	return 1;
+	}