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-rw-r--r--polarssl/src/library/md2.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/polarssl/src/library/md2.c b/polarssl/src/library/md2.c
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+/*
+ * RFC 1115/1319 compliant MD2 implementation
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ * The MD2 algorithm was designed by Ron Rivest in 1989.
+ *
+ * http://www.ietf.org/rfc/rfc1115.txt
+ * http://www.ietf.org/rfc/rfc1319.txt
+ */
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_MD2_C)
+
+#include "polarssl/md2.h"
+
+#if defined(POLARSSL_FS_IO) || defined(POLARSSL_SELF_TEST)
+#include <stdio.h>
+#endif
+
+static const unsigned char PI_SUBST[256] =
+{
+ 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
+ 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
+ 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
+ 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
+ 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
+ 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
+ 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
+ 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
+ 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
+ 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
+ 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
+ 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
+ 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
+ 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
+ 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
+ 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
+ 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
+ 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
+ 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
+ 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
+ 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
+ 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
+ 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
+ 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
+ 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
+ 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
+};
+
+/*
+ * MD2 context setup
+ */
+void md2_starts( md2_context *ctx )
+{
+ memset( ctx->cksum, 0, 16 );
+ memset( ctx->state, 0, 46 );
+ memset( ctx->buffer, 0, 16 );
+ ctx->left = 0;
+}
+
+static void md2_process( md2_context *ctx )
+{
+ int i, j;
+ unsigned char t = 0;
+
+ for( i = 0; i < 16; i++ )
+ {
+ ctx->state[i + 16] = ctx->buffer[i];
+ ctx->state[i + 32] =
+ (unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
+ }
+
+ for( i = 0; i < 18; i++ )
+ {
+ for( j = 0; j < 48; j++ )
+ {
+ ctx->state[j] = (unsigned char)
+ ( ctx->state[j] ^ PI_SUBST[t] );
+ t = ctx->state[j];
+ }
+
+ t = (unsigned char)( t + i );
+ }
+
+ t = ctx->cksum[15];
+
+ for( i = 0; i < 16; i++ )
+ {
+ ctx->cksum[i] = (unsigned char)
+ ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
+ t = ctx->cksum[i];
+ }
+}
+
+/*
+ * MD2 process buffer
+ */
+void md2_update( md2_context *ctx, const unsigned char *input, size_t ilen )
+{
+ size_t fill;
+
+ while( ilen > 0 )
+ {
+ if( ctx->left + ilen > 16 )
+ fill = 16 - ctx->left;
+ else
+ fill = ilen;
+
+ memcpy( ctx->buffer + ctx->left, input, fill );
+
+ ctx->left += fill;
+ input += fill;
+ ilen -= fill;
+
+ if( ctx->left == 16 )
+ {
+ ctx->left = 0;
+ md2_process( ctx );
+ }
+ }
+}
+
+/*
+ * MD2 final digest
+ */
+void md2_finish( md2_context *ctx, unsigned char output[16] )
+{
+ size_t i;
+ unsigned char x;
+
+ x = (unsigned char)( 16 - ctx->left );
+
+ for( i = ctx->left; i < 16; i++ )
+ ctx->buffer[i] = x;
+
+ md2_process( ctx );
+
+ memcpy( ctx->buffer, ctx->cksum, 16 );
+ md2_process( ctx );
+
+ memcpy( output, ctx->state, 16 );
+}
+
+/*
+ * output = MD2( input buffer )
+ */
+void md2( const unsigned char *input, size_t ilen, unsigned char output[16] )
+{
+ md2_context ctx;
+
+ md2_starts( &ctx );
+ md2_update( &ctx, input, ilen );
+ md2_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( md2_context ) );
+}
+
+#if defined(POLARSSL_FS_IO)
+/*
+ * output = MD2( file contents )
+ */
+int md2_file( const char *path, unsigned char output[16] )
+{
+ FILE *f;
+ size_t n;
+ md2_context ctx;
+ unsigned char buf[1024];
+
+ if( ( f = fopen( path, "rb" ) ) == NULL )
+ return( POLARSSL_ERR_MD2_FILE_IO_ERROR );
+
+ md2_starts( &ctx );
+
+ while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
+ md2_update( &ctx, buf, n );
+
+ md2_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( md2_context ) );
+
+ if( ferror( f ) != 0 )
+ {
+ fclose( f );
+ return( POLARSSL_ERR_MD2_FILE_IO_ERROR );
+ }
+
+ fclose( f );
+ return( 0 );
+}
+#endif /* POLARSSL_FS_IO */
+
+/*
+ * MD2 HMAC context setup
+ */
+void md2_hmac_starts( md2_context *ctx, const unsigned char *key, size_t keylen )
+{
+ size_t i;
+ unsigned char sum[16];
+
+ if( keylen > 16 )
+ {
+ md2( key, keylen, sum );
+ keylen = 16;
+ key = sum;
+ }
+
+ memset( ctx->ipad, 0x36, 16 );
+ memset( ctx->opad, 0x5C, 16 );
+
+ for( i = 0; i < keylen; i++ )
+ {
+ ctx->ipad[i] = (unsigned char)( ctx->ipad[i] ^ key[i] );
+ ctx->opad[i] = (unsigned char)( ctx->opad[i] ^ key[i] );
+ }
+
+ md2_starts( ctx );
+ md2_update( ctx, ctx->ipad, 16 );
+
+ memset( sum, 0, sizeof( sum ) );
+}
+
+/*
+ * MD2 HMAC process buffer
+ */
+void md2_hmac_update( md2_context *ctx, const unsigned char *input, size_t ilen )
+{
+ md2_update( ctx, input, ilen );
+}
+
+/*
+ * MD2 HMAC final digest
+ */
+void md2_hmac_finish( md2_context *ctx, unsigned char output[16] )
+{
+ unsigned char tmpbuf[16];
+
+ md2_finish( ctx, tmpbuf );
+ md2_starts( ctx );
+ md2_update( ctx, ctx->opad, 16 );
+ md2_update( ctx, tmpbuf, 16 );
+ md2_finish( ctx, output );
+
+ memset( tmpbuf, 0, sizeof( tmpbuf ) );
+}
+
+/*
+ * MD2 HMAC context reset
+ */
+void md2_hmac_reset( md2_context *ctx )
+{
+ md2_starts( ctx );
+ md2_update( ctx, ctx->ipad, 16 );
+}
+
+/*
+ * output = HMAC-MD2( hmac key, input buffer )
+ */
+void md2_hmac( const unsigned char *key, size_t keylen,
+ const unsigned char *input, size_t ilen,
+ unsigned char output[16] )
+{
+ md2_context ctx;
+
+ md2_hmac_starts( &ctx, key, keylen );
+ md2_hmac_update( &ctx, input, ilen );
+ md2_hmac_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( md2_context ) );
+}
+
+#if defined(POLARSSL_SELF_TEST)
+
+/*
+ * RFC 1319 test vectors
+ */
+static const char md2_test_str[7][81] =
+{
+ { "" },
+ { "a" },
+ { "abc" },
+ { "message digest" },
+ { "abcdefghijklmnopqrstuvwxyz" },
+ { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
+ { "12345678901234567890123456789012345678901234567890123456789012" \
+ "345678901234567890" }
+};
+
+static const unsigned char md2_test_sum[7][16] =
+{
+ { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
+ 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
+ { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
+ 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
+ { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
+ 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
+ { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
+ 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
+ { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
+ 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
+ { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
+ 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
+ { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
+ 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
+};
+
+/*
+ * Checkup routine
+ */
+int md2_self_test( int verbose )
+{
+ int i;
+ unsigned char md2sum[16];
+
+ for( i = 0; i < 7; i++ )
+ {
+ if( verbose != 0 )
+ printf( " MD2 test #%d: ", i + 1 );
+
+ md2( (unsigned char *) md2_test_str[i],
+ strlen( md2_test_str[i] ), md2sum );
+
+ if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
+ {
+ if( verbose != 0 )
+ printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ if( verbose != 0 )
+ printf( "passed\n" );
+ }
+
+ if( verbose != 0 )
+ printf( "\n" );
+
+ return( 0 );
+}
+
+#endif
+
+#endif
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