- Added XTEA Algorithm (Not used in SSL)
diff --git a/library/Makefile b/library/Makefile
index b28c858..611540f 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -24,7 +24,7 @@
net.o padlock.o rsa.o \
sha1.o sha2.o sha4.o \
ssl_cli.o ssl_srv.o ssl_tls.o \
- timing.o x509parse.o
+ timing.o x509parse.o xtea.o
.SILENT:
diff --git a/library/xtea.c b/library/xtea.c
new file mode 100644
index 0000000..c775c1e
--- /dev/null
+++ b/library/xtea.c
@@ -0,0 +1,184 @@
+/*
+ * An 32-bit implementation of the XTEA algorithm
+ *
+ * Copyright (C) 2009 Paul Bakker
+ *
+ * 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.
+ */
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_XTEA_C)
+
+#include "polarssl/xtea.h"
+
+#include <string.h>
+
+/*
+ * 32-bit integer manipulation macros (big endian)
+ */
+#ifndef GET_ULONG_BE
+#define GET_ULONG_BE(n,b,i) \
+{ \
+ (n) = ( (unsigned long) (b)[(i) ] << 24 ) \
+ | ( (unsigned long) (b)[(i) + 1] << 16 ) \
+ | ( (unsigned long) (b)[(i) + 2] << 8 ) \
+ | ( (unsigned long) (b)[(i) + 3] ); \
+}
+#endif
+
+#ifndef PUT_ULONG_BE
+#define PUT_ULONG_BE(n,b,i) \
+{ \
+ (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
+ (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
+ (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
+ (b)[(i) + 3] = (unsigned char) ( (n) ); \
+}
+#endif
+
+/*
+ * XTEA key schedule
+ */
+void xtea_setup( xtea_context *ctx, unsigned char key[16] )
+{
+ int i;
+
+ memset(ctx, 0, sizeof(xtea_context));
+
+ for( i = 0; i < 4; i++ )
+ {
+ GET_ULONG_BE( ctx->k[i], key, i << 2 );
+ }
+}
+
+/*
+ * XTEA encrypt function
+ */
+void xtea_crypt_ecb( xtea_context *ctx, int mode, unsigned char input[8], unsigned char output[8])
+{
+ unsigned long *k, v0, v1, i;
+
+ k = ctx->k;
+
+ GET_ULONG_BE( v0, input, 0 );
+ GET_ULONG_BE( v1, input, 4 );
+
+ if( mode == XTEA_ENCRYPT )
+ {
+ unsigned long sum = 0, delta = 0x9E3779B9;
+
+ for( i = 0; i < 32; i++ )
+ {
+ v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);
+ sum += delta;
+ v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);
+ }
+ }
+ else /* XTEA_DECRYPT */
+ {
+ unsigned long delta = 0x9E3779B9, sum = delta * 32;
+
+ for( i = 0; i < 32; i++ )
+ {
+ v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);
+ sum -= delta;
+ v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);
+ }
+ }
+
+ PUT_ULONG_BE( v0, output, 0 );
+ PUT_ULONG_BE( v1, output, 4 );
+}
+
+#if defined(POLARSSL_SELF_TEST)
+
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * XTEA tests vectors (non-official)
+ */
+
+static const unsigned char xtea_test_key[6][16] =
+{
+ { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
+ { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
+ { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
+};
+
+static const unsigned char xtea_test_pt[6][8] =
+{
+ { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
+ { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
+ { 0x5a, 0x5b, 0x6e, 0x27, 0x89, 0x48, 0xd7, 0x7f },
+ { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
+ { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
+ { 0x70, 0xe1, 0x22, 0x5d, 0x6e, 0x4e, 0x76, 0x55 }
+};
+
+static const unsigned char xtea_test_ct[6][8] =
+{
+ { 0x49, 0x7d, 0xf3, 0xd0, 0x72, 0x61, 0x2c, 0xb5 },
+ { 0xe7, 0x8f, 0x2d, 0x13, 0x74, 0x43, 0x41, 0xd8 },
+ { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
+ { 0xa0, 0x39, 0x05, 0x89, 0xf8, 0xb8, 0xef, 0xa5 },
+ { 0xed, 0x23, 0x37, 0x5a, 0x82, 0x1a, 0x8c, 0x2d },
+ { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 }
+};
+
+/*
+ * Checkup routine
+ */
+int xtea_self_test( int verbose )
+{
+ int i;
+ unsigned char buf[8];
+ xtea_context ctx;
+
+ for( i = 0; i < 6; i++ )
+ {
+ if( verbose != 0 )
+ printf( " XTEA test #%d: ", i + 1 );
+
+ memcpy( buf, xtea_test_pt[i], 8 );
+
+ xtea_setup( &ctx, (unsigned char *) xtea_test_key[i] );
+ xtea_crypt_ecb( &ctx, XTEA_ENCRYPT, buf, buf );
+
+ if( memcmp( buf, xtea_test_ct[i], 8 ) != 0 )
+ {
+ if( verbose != 0 )
+ printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ if( verbose != 0 )
+ printf( "passed\n" );
+ }
+
+ if( verbose != 0 )
+ printf( "\n" );
+
+ return( 0 );
+}
+
+#endif
+
+#endif