Remove internal md5 and sha2 implementations

The internal implementations for md5 and sha256 checksums have not been merged
from upstream sources for a long time.  Instead of us carrying copies of code
from other projects, we should just support building against multiple libraries
that provide such functionality.

This patch removes the md5 and sha2 code (originally obtained from PolarSSL)
from our repository.  The configure script will now error unless at least one
library supporting checksum generation is present, with the only library
currently supported being openssl.  It will be relatively simple for other
such libraries (e.g. nettle) to be supported if anyone wishes to add them.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 0 insertions, 65 deletions

diff --git a/lib/libalpm/sha2.h b/lib/libalpm/sha2.h
deleted file mode 100644
index 99267de9..00000000
--- a/lib/libalpm/sha2.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- *  SHA-224 and SHA-256 cryptographic hash function
- *
- *  Copyright (C) 2006-2010, Brainspark B.V.
- *
- *  This file is part of PolarSSL (http://www.polarssl.org)
- *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
- *
- *  All rights reserved.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef SHA2_H
-#define SHA2_H
-
-#include <string.h>
-
-/**
- * \brief          SHA-256 context structure
- */
-typedef struct
-{
-    unsigned long total[2];     /*!< number of bytes processed  */
-    unsigned long state[8];     /*!< intermediate digest state  */
-    unsigned char buffer[64];   /*!< data block being processed */
-
-    int is224;                  /*!< 0 => SHA-256, else SHA-224 */
-}
-sha2_context;
-
-/**
- * \brief          Output = SHA-256( input buffer )
- *
- * \param input    buffer holding the  data
- * \param ilen     length of the input data
- * \param output   SHA-224/256 checksum result
- * \param is224    0 = use SHA256, 1 = use SHA224
- */
-void sha2( const unsigned char *input, size_t ilen,
-           unsigned char output[32], int is224 );
-
-/**
- * \brief          Output = SHA-256( file contents )
- *
- * \param path     input file name
- * \param output   SHA-224/256 checksum result
- * \param is224    0 = use SHA256, 1 = use SHA224
- *
- * \return         0 if successful, 1 if fopen failed,
- *                 or 2 if fread failed
- */
-int sha2_file( const char *path, unsigned char output[32], int is224 );
-
-#endif /* sha2.h */