--- /dev/null
+/*****************************************************************************
+ * md5.c: not so strong MD5 hashing
+ *****************************************************************************
+ * Copyright (C) 2004-2005 VideoLAN
+ * $Id: drms.c 10101 2005-03-02 16:47:31Z robux4 $
+ *
+ * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
+ * Sam Hocevar <sam@zoy.org>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+#include <string.h>
+#include <vlc/vlc.h>
+#include "vlc_md5.h"
+
+#ifdef WORDS_BIGENDIAN
+/*****************************************************************************
+ * Reverse: reverse byte order
+ *****************************************************************************/
+static inline void Reverse( uint32_t *p_buffer, int n )
+{
+ int i;
+
+ for( i = 0; i < n; i++ )
+ {
+ p_buffer[ i ] = GetDWLE(&p_buffer[ i ]);
+ }
+}
+# define REVERSE( p, n ) Reverse( p, n )
+#else
+# define REVERSE( p, n )
+#endif
+
+#define F1( x, y, z ) ((z) ^ ((x) & ((y) ^ (z))))
+#define F2( x, y, z ) F1((z), (x), (y))
+#define F3( x, y, z ) ((x) ^ (y) ^ (z))
+#define F4( x, y, z ) ((y) ^ ((x) | ~(z)))
+
+#define MD5_DO( f, w, x, y, z, data, s ) \
+ ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
+
+/*****************************************************************************
+ * Digest: update the MD5 digest with 64 bytes of data
+ *****************************************************************************/
+void Digest( struct md5_s *p_md5, uint32_t *p_input )
+{
+ uint32_t a, b, c, d;
+
+ REVERSE( p_input, 16 );
+
+ a = p_md5->p_digest[ 0 ];
+ b = p_md5->p_digest[ 1 ];
+ c = p_md5->p_digest[ 2 ];
+ d = p_md5->p_digest[ 3 ];
+
+ MD5_DO( F1, a, b, c, d, p_input[ 0 ] + 0xd76aa478, 7 );
+ MD5_DO( F1, d, a, b, c, p_input[ 1 ] + 0xe8c7b756, 12 );
+ MD5_DO( F1, c, d, a, b, p_input[ 2 ] + 0x242070db, 17 );
+ MD5_DO( F1, b, c, d, a, p_input[ 3 ] + 0xc1bdceee, 22 );
+ MD5_DO( F1, a, b, c, d, p_input[ 4 ] + 0xf57c0faf, 7 );
+ MD5_DO( F1, d, a, b, c, p_input[ 5 ] + 0x4787c62a, 12 );
+ MD5_DO( F1, c, d, a, b, p_input[ 6 ] + 0xa8304613, 17 );
+ MD5_DO( F1, b, c, d, a, p_input[ 7 ] + 0xfd469501, 22 );
+ MD5_DO( F1, a, b, c, d, p_input[ 8 ] + 0x698098d8, 7 );
+ MD5_DO( F1, d, a, b, c, p_input[ 9 ] + 0x8b44f7af, 12 );
+ MD5_DO( F1, c, d, a, b, p_input[ 10 ] + 0xffff5bb1, 17 );
+ MD5_DO( F1, b, c, d, a, p_input[ 11 ] + 0x895cd7be, 22 );
+ MD5_DO( F1, a, b, c, d, p_input[ 12 ] + 0x6b901122, 7 );
+ MD5_DO( F1, d, a, b, c, p_input[ 13 ] + 0xfd987193, 12 );
+ MD5_DO( F1, c, d, a, b, p_input[ 14 ] + 0xa679438e, 17 );
+ MD5_DO( F1, b, c, d, a, p_input[ 15 ] + 0x49b40821, 22 );
+
+ MD5_DO( F2, a, b, c, d, p_input[ 1 ] + 0xf61e2562, 5 );
+ MD5_DO( F2, d, a, b, c, p_input[ 6 ] + 0xc040b340, 9 );
+ MD5_DO( F2, c, d, a, b, p_input[ 11 ] + 0x265e5a51, 14 );
+ MD5_DO( F2, b, c, d, a, p_input[ 0 ] + 0xe9b6c7aa, 20 );
+ MD5_DO( F2, a, b, c, d, p_input[ 5 ] + 0xd62f105d, 5 );
+ MD5_DO( F2, d, a, b, c, p_input[ 10 ] + 0x02441453, 9 );
+ MD5_DO( F2, c, d, a, b, p_input[ 15 ] + 0xd8a1e681, 14 );
+ MD5_DO( F2, b, c, d, a, p_input[ 4 ] + 0xe7d3fbc8, 20 );
+ MD5_DO( F2, a, b, c, d, p_input[ 9 ] + 0x21e1cde6, 5 );
+ MD5_DO( F2, d, a, b, c, p_input[ 14 ] + 0xc33707d6, 9 );
+ MD5_DO( F2, c, d, a, b, p_input[ 3 ] + 0xf4d50d87, 14 );
+ MD5_DO( F2, b, c, d, a, p_input[ 8 ] + 0x455a14ed, 20 );
+ MD5_DO( F2, a, b, c, d, p_input[ 13 ] + 0xa9e3e905, 5 );
+ MD5_DO( F2, d, a, b, c, p_input[ 2 ] + 0xfcefa3f8, 9 );
+ MD5_DO( F2, c, d, a, b, p_input[ 7 ] + 0x676f02d9, 14 );
+ MD5_DO( F2, b, c, d, a, p_input[ 12 ] + 0x8d2a4c8a, 20 );
+
+ MD5_DO( F3, a, b, c, d, p_input[ 5 ] + 0xfffa3942, 4 );
+ MD5_DO( F3, d, a, b, c, p_input[ 8 ] + 0x8771f681, 11 );
+ MD5_DO( F3, c, d, a, b, p_input[ 11 ] + 0x6d9d6122, 16 );
+ MD5_DO( F3, b, c, d, a, p_input[ 14 ] + 0xfde5380c, 23 );
+ MD5_DO( F3, a, b, c, d, p_input[ 1 ] + 0xa4beea44, 4 );
+ MD5_DO( F3, d, a, b, c, p_input[ 4 ] + 0x4bdecfa9, 11 );
+ MD5_DO( F3, c, d, a, b, p_input[ 7 ] + 0xf6bb4b60, 16 );
+ MD5_DO( F3, b, c, d, a, p_input[ 10 ] + 0xbebfbc70, 23 );
+ MD5_DO( F3, a, b, c, d, p_input[ 13 ] + 0x289b7ec6, 4 );
+ MD5_DO( F3, d, a, b, c, p_input[ 0 ] + 0xeaa127fa, 11 );
+ MD5_DO( F3, c, d, a, b, p_input[ 3 ] + 0xd4ef3085, 16 );
+ MD5_DO( F3, b, c, d, a, p_input[ 6 ] + 0x04881d05, 23 );
+ MD5_DO( F3, a, b, c, d, p_input[ 9 ] + 0xd9d4d039, 4 );
+ MD5_DO( F3, d, a, b, c, p_input[ 12 ] + 0xe6db99e5, 11 );
+ MD5_DO( F3, c, d, a, b, p_input[ 15 ] + 0x1fa27cf8, 16 );
+ MD5_DO( F3, b, c, d, a, p_input[ 2 ] + 0xc4ac5665, 23 );
+
+ MD5_DO( F4, a, b, c, d, p_input[ 0 ] + 0xf4292244, 6 );
+ MD5_DO( F4, d, a, b, c, p_input[ 7 ] + 0x432aff97, 10 );
+ MD5_DO( F4, c, d, a, b, p_input[ 14 ] + 0xab9423a7, 15 );
+ MD5_DO( F4, b, c, d, a, p_input[ 5 ] + 0xfc93a039, 21 );
+ MD5_DO( F4, a, b, c, d, p_input[ 12 ] + 0x655b59c3, 6 );
+ MD5_DO( F4, d, a, b, c, p_input[ 3 ] + 0x8f0ccc92, 10 );
+ MD5_DO( F4, c, d, a, b, p_input[ 10 ] + 0xffeff47d, 15 );
+ MD5_DO( F4, b, c, d, a, p_input[ 1 ] + 0x85845dd1, 21 );
+ MD5_DO( F4, a, b, c, d, p_input[ 8 ] + 0x6fa87e4f, 6 );
+ MD5_DO( F4, d, a, b, c, p_input[ 15 ] + 0xfe2ce6e0, 10 );
+ MD5_DO( F4, c, d, a, b, p_input[ 6 ] + 0xa3014314, 15 );
+ MD5_DO( F4, b, c, d, a, p_input[ 13 ] + 0x4e0811a1, 21 );
+ MD5_DO( F4, a, b, c, d, p_input[ 4 ] + 0xf7537e82, 6 );
+ MD5_DO( F4, d, a, b, c, p_input[ 11 ] + 0xbd3af235, 10 );
+ MD5_DO( F4, c, d, a, b, p_input[ 2 ] + 0x2ad7d2bb, 15 );
+ MD5_DO( F4, b, c, d, a, p_input[ 9 ] + 0xeb86d391, 21 );
+
+ p_md5->p_digest[ 0 ] += a;
+ p_md5->p_digest[ 1 ] += b;
+ p_md5->p_digest[ 2 ] += c;
+ p_md5->p_digest[ 3 ] += d;
+}
+
+/*****************************************************************************
+ * InitMD5: initialise an MD5 message
+ *****************************************************************************
+ * The MD5 message-digest algorithm is described in RFC 1321
+ *****************************************************************************/
+void InitMD5( struct md5_s *p_md5 )
+{
+ p_md5->p_digest[ 0 ] = 0x67452301;
+ p_md5->p_digest[ 1 ] = 0xefcdab89;
+ p_md5->p_digest[ 2 ] = 0x98badcfe;
+ p_md5->p_digest[ 3 ] = 0x10325476;
+
+ memset( p_md5->p_data, 0, 64 );
+ p_md5->i_bits = 0;
+}
+
+/*****************************************************************************
+ * AddMD5: add i_len bytes to an MD5 message
+ *****************************************************************************/
+void AddMD5( struct md5_s *p_md5, const uint8_t *p_src, uint32_t i_len )
+{
+ unsigned int i_current; /* Current bytes in the spare buffer */
+ unsigned int i_offset = 0;
+
+ i_current = (p_md5->i_bits / 8) & 63;
+
+ p_md5->i_bits += 8 * i_len;
+
+ /* If we can complete our spare buffer to 64 bytes, do it and add the
+ * resulting buffer to the MD5 message */
+ if( i_len >= (64 - i_current) )
+ {
+ memcpy( ((uint8_t *)p_md5->p_data) + i_current, p_src,
+ (64 - i_current) );
+ Digest( p_md5, p_md5->p_data );
+
+ i_offset += (64 - i_current);
+ i_len -= (64 - i_current);
+ i_current = 0;
+ }
+
+ /* Add as many entire 64 bytes blocks as we can to the MD5 message */
+ while( i_len >= 64 )
+ {
+ uint32_t p_tmp[ 16 ];
+ memcpy( p_tmp, p_src + i_offset, 64 );
+ Digest( p_md5, p_tmp );
+ i_offset += 64;
+ i_len -= 64;
+ }
+
+ /* Copy our remaining data to the message's spare buffer */
+ memcpy( ((uint8_t *)p_md5->p_data) + i_current, p_src + i_offset, i_len );
+}
+
+/*****************************************************************************
+ * EndMD5: finish an MD5 message
+ *****************************************************************************
+ * This function adds adequate padding to the end of the message, and appends
+ * the bit count so that we end at a block boundary.
+ *****************************************************************************/
+void EndMD5( struct md5_s *p_md5 )
+{
+ unsigned int i_current;
+
+ i_current = (p_md5->i_bits / 8) & 63;
+
+ /* Append 0x80 to our buffer. No boundary check because the temporary
+ * buffer cannot be full, otherwise AddMD5 would have emptied it. */
+ ((uint8_t *)p_md5->p_data)[ i_current++ ] = 0x80;
+
+ /* If less than 8 bytes are available at the end of the block, complete
+ * this 64 bytes block with zeros and add it to the message. We'll add
+ * our length at the end of the next block. */
+ if( i_current > 56 )
+ {
+ memset( ((uint8_t *)p_md5->p_data) + i_current, 0, (64 - i_current) );
+ Digest( p_md5, p_md5->p_data );
+ i_current = 0;
+ }
+
+ /* Fill the unused space in our last block with zeroes and put the
+ * message length at the end. */
+ memset( ((uint8_t *)p_md5->p_data) + i_current, 0, (56 - i_current) );
+ p_md5->p_data[ 14 ] = p_md5->i_bits & 0xffffffff;
+ p_md5->p_data[ 15 ] = (p_md5->i_bits >> 32);
+ REVERSE( &p_md5->p_data[ 14 ], 2 );
+
+ Digest( p_md5, p_md5->p_data );
+}
+
+
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