Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1999 - 2007 Pekka Riikonen
+ Copyright (C) 1999 - 2008 Pekka Riikonen
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
#ifndef CIPHERS_DEF_H
#define CIPHERS_DEF_H
+
+#include "silclog.h"
+
/* General definitions for algorithms */
typedef unsigned char u1byte;
typedef SilcUInt32 u4byte;
SILC_PUT32_MSB(block[1], &iv[4]); \
} while(0)
+#ifndef WORDS_BIGENDIAN
-/* CTR mode 128-bit block, MSB, MSB counter, the 8-bit enc_ctr argument must
- be encrypted */
+/* CTR mode 128-bit block, MSB, MSB counter, the 8-bit ctr argument must
+ be encrypted to enc_ctr */
-#define SILC_CTR_MSB_128_8(iv, ctr, enc_ctr, pad, src, dst, enc) \
+#define SILC_CTR_MSB_128_8(ctr, enc_ctr, pad, src, dst, enc) \
do { \
- SILC_GET32_MSB(ctr[0], iv); \
- SILC_GET32_MSB(ctr[1], iv + 4); \
- SILC_GET32_MSB(ctr[2], iv + 8); \
- SILC_GET32_MSB(ctr[3], iv + 12); \
- \
- if (pad == 0) \
- pad = 16; \
- \
- while (len-- > 0) { \
+ while (len > 0) { \
if (pad == 16) { \
- if (++ctr[3] == 0) \
- if (++ctr[2] == 0) \
- if (++ctr[1] == 0) \
- ++ctr[0]; \
- \
- SILC_PUT32_MSB(ctr[0], enc_ctr); \
- SILC_PUT32_MSB(ctr[1], enc_ctr + 4); \
- SILC_PUT32_MSB(ctr[2], enc_ctr + 8); \
- SILC_PUT32_MSB(ctr[3], enc_ctr + 12); \
+ for (i = 15; i >= 0; i--) \
+ if (++ctr[i]) \
+ break; \
\
enc; \
+ \
+ if (len >= 16) { \
+ *(SilcUInt64 *)dst = *(SilcUInt64 *)src ^ *(SilcUInt64 *)enc_ctr; \
+ *(SilcUInt64 *)(dst + 8) = *(SilcUInt64 *)(src + 8) ^ \
+ *(SilcUInt64 *)(enc_ctr + 8); \
+ src += 16; \
+ dst += 16; \
+ len -= 16; \
+ silc_prefetch((void *)src, 0, 0); \
+ continue; \
+ } \
pad = 0; \
} \
*dst++ = *src++ ^ enc_ctr[pad++]; \
+ len--; \
} \
- \
- SILC_PUT32_MSB(ctr[0], iv); \
- SILC_PUT32_MSB(ctr[1], iv + 4); \
- SILC_PUT32_MSB(ctr[2], iv + 8); \
- SILC_PUT32_MSB(ctr[3], iv + 12); \
} while(0)
-/* CTR mode 128-bit block, MSB, MSB counter, the 32-bit ctr argument must
- be encrypted to enc_ctr */
+#else /* WORDS_BIGENDIAN */
-#define SILC_CTR_MSB_128_32(iv, ctr, enc_ctr, pad, src, dst, enc) \
+#define SILC_CTR_MSB_128_8(ctr, enc_ctr, pad, src, dst, enc) \
do { \
- SILC_GET32_MSB(ctr[0], iv); \
- SILC_GET32_MSB(ctr[1], iv + 4); \
- SILC_GET32_MSB(ctr[2], iv + 8); \
- SILC_GET32_MSB(ctr[3], iv + 12); \
- \
- if (pad == 0) \
- pad = 16; \
- \
while (len-- > 0) { \
if (pad == 16) { \
- if (++ctr[3] == 0) \
- if (++ctr[2] == 0) \
- if (++ctr[1] == 0) \
- ++ctr[0]; \
+ for (i = 15; i >= 0; i--) \
+ if (++ctr[i]) \
+ break; \
\
enc; \
- SILC_PUT32_MSB(enc_ctr[0], iv); \
- SILC_PUT32_MSB(enc_ctr[1], iv + 4); \
- SILC_PUT32_MSB(enc_ctr[2], iv + 8); \
- SILC_PUT32_MSB(enc_ctr[3], iv + 12); \
pad = 0; \
} \
*dst++ = *src++ ^ enc_ctr[pad++]; \
} \
- \
- SILC_PUT32_MSB(ctr[0], iv); \
- SILC_PUT32_MSB(ctr[1], iv + 4); \
- SILC_PUT32_MSB(ctr[2], iv + 8); \
- SILC_PUT32_MSB(ctr[3], iv + 12); \
} while(0)
-/* CTR mode 128-bit block, LSB, MSB counter, the 32-bit enc_ctr argument
- must be encrypted */
+#endif /* !WORDS_BIGENDIAN */
+
+/* CTR mode 128-bit block, LSB, MSB counter, the 32-bit tmp argument
+ must be encrypted, enc_ctr must have the encrypted data too. */
-#define SILC_CTR_LSB_128_32(iv, ctr, enc_ctr, pad, src, dst, enc) \
+#define SILC_CTR_LSB_128_32(ctr, tmp, enc_ctr, pad, src, dst, enc) \
do { \
- SILC_GET32_MSB(ctr[0], iv); \
- SILC_GET32_MSB(ctr[1], iv + 4); \
- SILC_GET32_MSB(ctr[2], iv + 8); \
- SILC_GET32_MSB(ctr[3], iv + 12); \
- \
- if (pad == 0) \
- pad = 16; \
- \
while (len-- > 0) { \
if (pad == 16) { \
- if (++ctr[3] == 0) \
- if (++ctr[2] == 0) \
- if (++ctr[1] == 0) \
- ++ctr[0]; \
- \
- enc_ctr[0] = SILC_SWAB_32(ctr[0]); \
- enc_ctr[1] = SILC_SWAB_32(ctr[1]); \
- enc_ctr[2] = SILC_SWAB_32(ctr[2]); \
- enc_ctr[3] = SILC_SWAB_32(ctr[3]); \
+ for (i = 15; i >= 0; i--) \
+ if (++ctr[i]) \
+ break; \
\
+ SILC_GET32_LSB(tmp[0], ctr); \
+ SILC_GET32_LSB(tmp[1], ctr + 4); \
+ SILC_GET32_LSB(tmp[2], ctr + 8); \
+ SILC_GET32_LSB(tmp[3], ctr + 12); \
enc; \
- SILC_PUT32_LSB(enc_ctr[0], iv); \
- SILC_PUT32_LSB(enc_ctr[1], iv + 4); \
- SILC_PUT32_LSB(enc_ctr[2], iv + 8); \
- SILC_PUT32_LSB(enc_ctr[3], iv + 12); \
+ SILC_PUT32_LSB(tmp[0], enc_ctr); \
+ SILC_PUT32_LSB(tmp[1], enc_ctr + 4); \
+ SILC_PUT32_LSB(tmp[2], enc_ctr + 8); \
+ SILC_PUT32_LSB(tmp[3], enc_ctr + 12); \
pad = 0; \
} \
- *dst++ = *src++ ^ iv[pad++]; \
+ *dst++ = *src++ ^ enc_ctr[pad++]; \
} \
- \
- SILC_PUT32_MSB(ctr[0], iv); \
- SILC_PUT32_MSB(ctr[1], iv + 4); \
- SILC_PUT32_MSB(ctr[2], iv + 8); \
- SILC_PUT32_MSB(ctr[3], iv + 12); \
} while(0)
-/* CTR mode 64-bit block, MSB, MSB counter, the 32-bit ctr argument must
- be encrypted to enc_ctr */
+/* CTR mode 128-bit block, LSB, MSB counter, the 32-bit tmp argument
+ must be encrypted, enc_ctr must have the encrypted data too. */
-#define SILC_CTR_MSB_64_32(iv, ctr, enc_ctr, pad, src, dst, enc) \
+#define SILC_CTR_MSB_64_32(ctr, tmp, enc_ctr, pad, src, dst, enc) \
do { \
- SILC_GET32_MSB(ctr[0], iv); \
- SILC_GET32_MSB(ctr[1], iv + 4); \
- \
- if (pad == 0) \
- pad = 8; \
- \
while (len-- > 0) { \
if (pad == 8) { \
- if (++ctr[1] == 0) \
- ++ctr[0]; \
+ for (i = 7; i >= 0; i--) \
+ if (++ctr[i]) \
+ break; \
\
+ SILC_GET32_MSB(tmp[0], ctr); \
+ SILC_GET32_MSB(tmp[1], ctr + 4); \
enc; \
- SILC_PUT32_MSB(enc_ctr[0], iv); \
- SILC_PUT32_MSB(enc_ctr[1], iv + 4); \
+ SILC_PUT32_MSB(tmp[0], enc_ctr); \
+ SILC_PUT32_MSB(tmp[1], enc_ctr + 4); \
pad = 0; \
} \
- *dst++ = *src++ ^ iv[pad++]; \
+ *dst++ = *src++ ^ enc_ctr[pad++]; \
} \
- \
- SILC_PUT32_MSB(ctr[0], iv); \
- SILC_PUT32_MSB(ctr[1], iv + 4); \
} while(0)
/* CFB 128-bit block, LSB, the 32-bit cfb argument must be encrypted. */
projects / crypto.git / blobdiff