Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1999 - 2006 Pekka Riikonen
+ Copyright (C) 1999 - 2007 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
SILC_GET32_LSB(d[_i], s + (_i * 4)); \
} while(0);
-/* CBC mode macros (LSB). */
+/* CBC mode 128-bit block, LSB, 32-bit block argument must be encrypted */
-#define SILC_CBC_GET_IV(d, s) \
-do { \
- SILC_GET32_LSB(d[0], &s[0]); \
- SILC_GET32_LSB(d[1], &s[4]); \
- SILC_GET32_LSB(d[2], &s[8]); \
- SILC_GET32_LSB(d[3], &s[12]); \
-} while(0);
+#define SILC_CBC_ENC_LSB_128_32(len, iv, block, src, dst, i, enc) \
+do { \
+ SILC_ASSERT((len & (16 - 1)) == 0); \
+ if (len & (16 - 1)) \
+ return FALSE; \
+ \
+ SILC_GET32_LSB(block[0], &iv[0]); \
+ SILC_GET32_LSB(block[1], &iv[4]); \
+ SILC_GET32_LSB(block[2], &iv[8]); \
+ SILC_GET32_LSB(block[3], &iv[12]); \
+ \
+ for (i = 0; i < len; i += 16) { \
+ SILC_GET32_X_LSB(block[0], &src[0]); \
+ SILC_GET32_X_LSB(block[1], &src[4]); \
+ SILC_GET32_X_LSB(block[2], &src[8]); \
+ SILC_GET32_X_LSB(block[3], &src[12]); \
+ \
+ enc; \
+ \
+ SILC_PUT32_LSB(block[0], &dst[0]); \
+ SILC_PUT32_LSB(block[1], &dst[4]); \
+ SILC_PUT32_LSB(block[2], &dst[8]); \
+ SILC_PUT32_LSB(block[3], &dst[12]); \
+ \
+ dst += 16; \
+ src += 16; \
+ } \
+ \
+ SILC_PUT32_LSB(block[0], &iv[0]); \
+ SILC_PUT32_LSB(block[1], &iv[4]); \
+ SILC_PUT32_LSB(block[2], &iv[8]); \
+ SILC_PUT32_LSB(block[3], &iv[12]); \
+} while(0)
-#define SILC_CBC_PUT_IV(s, d) \
-do { \
- SILC_PUT32_LSB(s[0], &d[0]); \
- SILC_PUT32_LSB(s[1], &d[4]); \
- SILC_PUT32_LSB(s[2], &d[8]); \
- SILC_PUT32_LSB(s[3], &d[12]); \
-} while(0);
+/* CBC mode 128-bit block, LSB, decrypt block to block_dec. */
-#define SILC_CBC_ENC_PRE(d, s) \
-do { \
- SILC_GET32_X_LSB(d[0], &s[0]); \
- SILC_GET32_X_LSB(d[1], &s[4]); \
- SILC_GET32_X_LSB(d[2], &s[8]); \
- SILC_GET32_X_LSB(d[3], &s[12]); \
-} while(0);
+#define SILC_CBC_DEC_LSB_128_32(len, iv, block_prev, block, \
+ block_dec, src, dst, i, dec) \
+do { \
+ if (len & (16 - 1)) \
+ return FALSE; \
+ \
+ SILC_GET32_LSB(block_prev[0], &iv[0]); \
+ SILC_GET32_LSB(block_prev[1], &iv[4]); \
+ SILC_GET32_LSB(block_prev[2], &iv[8]); \
+ SILC_GET32_LSB(block_prev[3], &iv[12]); \
+ \
+ for (i = 0; i < len; i += 16) { \
+ SILC_GET32_LSB(block[0], &src[0]); \
+ SILC_GET32_LSB(block[1], &src[4]); \
+ SILC_GET32_LSB(block[2], &src[8]); \
+ SILC_GET32_LSB(block[3], &src[12]); \
+ \
+ dec; \
+ \
+ block_dec[0] ^= block_prev[0]; \
+ block_dec[1] ^= block_prev[1]; \
+ block_dec[2] ^= block_prev[2]; \
+ block_dec[3] ^= block_prev[3]; \
+ \
+ SILC_PUT32_LSB(block_dec[0], &dst[0]); \
+ SILC_PUT32_LSB(block_dec[1], &dst[4]); \
+ SILC_PUT32_LSB(block_dec[2], &dst[8]); \
+ SILC_PUT32_LSB(block_dec[3], &dst[12]); \
+ \
+ block_prev[0] = block[0]; \
+ block_prev[1] = block[1]; \
+ block_prev[2] = block[2]; \
+ block_prev[3] = block[3]; \
+ \
+ dst += 16; \
+ src += 16; \
+ } \
+ \
+ SILC_PUT32_LSB(block[0], &iv[0]); \
+ SILC_PUT32_LSB(block[1], &iv[4]); \
+ SILC_PUT32_LSB(block[2], &iv[8]); \
+ SILC_PUT32_LSB(block[3], &iv[12]); \
+} while(0)
-#define SILC_CBC_ENC_POST(s, d, t) \
-do { \
- SILC_PUT32_LSB(s[0], &d[0]); \
- SILC_PUT32_LSB(s[1], &d[4]); \
- SILC_PUT32_LSB(s[2], &d[8]); \
- SILC_PUT32_LSB(s[3], &d[12]); \
- \
- d += 16; \
- t += 16; \
-} while(0);
+/* CBC mode 128-bit block, MSB, 32-bit block argument must be encrypted */
-#define SILC_CBC_DEC_PRE(d, s) \
-do { \
- SILC_GET32_LSB(d[0], &s[0]); \
- SILC_GET32_LSB(d[1], &s[4]); \
- SILC_GET32_LSB(d[2], &s[8]); \
- SILC_GET32_LSB(d[3], &s[12]); \
-} while(0);
+#define SILC_CBC_ENC_MSB_128_32(len, iv, block, src, dst, i, enc) \
+do { \
+ SILC_ASSERT((len & (16 - 1)) == 0); \
+ if (len & (16 - 1)) \
+ return FALSE; \
+ \
+ SILC_GET32_MSB(block[0], &iv[0]); \
+ SILC_GET32_MSB(block[1], &iv[4]); \
+ SILC_GET32_MSB(block[2], &iv[8]); \
+ SILC_GET32_MSB(block[3], &iv[12]); \
+ \
+ for (i = 0; i < len; i += 16) { \
+ SILC_GET32_X_MSB(block[0], &src[0]); \
+ SILC_GET32_X_MSB(block[1], &src[4]); \
+ SILC_GET32_X_MSB(block[2], &src[8]); \
+ SILC_GET32_X_MSB(block[3], &src[12]); \
+ \
+ enc; \
+ \
+ SILC_PUT32_MSB(block[0], &dst[0]); \
+ SILC_PUT32_MSB(block[1], &dst[4]); \
+ SILC_PUT32_MSB(block[2], &dst[8]); \
+ SILC_PUT32_MSB(block[3], &dst[12]); \
+ \
+ dst += 16; \
+ src += 16; \
+ } \
+ \
+ SILC_PUT32_MSB(block[0], &iv[0]); \
+ SILC_PUT32_MSB(block[1], &iv[4]); \
+ SILC_PUT32_MSB(block[2], &iv[8]); \
+ SILC_PUT32_MSB(block[3], &iv[12]); \
+} while(0)
-#define SILC_CBC_DEC_POST(s, d, p, t, siv) \
-do { \
- s[0] ^= siv[0]; \
- s[1] ^= siv[1]; \
- s[2] ^= siv[2]; \
- s[3] ^= siv[3]; \
- \
- SILC_PUT32_LSB(s[0], &d[0]); \
- SILC_PUT32_LSB(s[1], &d[4]); \
- SILC_PUT32_LSB(s[2], &d[8]); \
- SILC_PUT32_LSB(s[3], &d[12]); \
- \
- siv[0] = t[0]; \
- siv[1] = t[1]; \
- siv[2] = t[2]; \
- siv[3] = t[3]; \
- \
- d += 16; \
- p += 16; \
-} while(0);
+/* CBC mode 128-bit block, MSB, decrypt block to block_dec. */
-/* CBC mode macros (MSB). */
+#define SILC_CBC_DEC_MSB_128_32(len, iv, block_prev, block, \
+ block_dec, src, dst, i, dec) \
+do { \
+ if (len & (16 - 1)) \
+ return FALSE; \
+ \
+ SILC_GET32_MSB(block_prev[0], &iv[0]); \
+ SILC_GET32_MSB(block_prev[1], &iv[4]); \
+ SILC_GET32_MSB(block_prev[2], &iv[8]); \
+ SILC_GET32_MSB(block_prev[3], &iv[12]); \
+ \
+ for (i = 0; i < len; i += 16) { \
+ SILC_GET32_MSB(block[0], &src[0]); \
+ SILC_GET32_MSB(block[1], &src[4]); \
+ SILC_GET32_MSB(block[2], &src[8]); \
+ SILC_GET32_MSB(block[3], &src[12]); \
+ \
+ dec; \
+ \
+ block_dec[0] ^= block_prev[0]; \
+ block_dec[1] ^= block_prev[1]; \
+ block_dec[2] ^= block_prev[2]; \
+ block_dec[3] ^= block_prev[3]; \
+ \
+ SILC_PUT32_MSB(block_dec[0], &dst[0]); \
+ SILC_PUT32_MSB(block_dec[1], &dst[4]); \
+ SILC_PUT32_MSB(block_dec[2], &dst[8]); \
+ SILC_PUT32_MSB(block_dec[3], &dst[12]); \
+ \
+ block_prev[0] = block[0]; \
+ block_prev[1] = block[1]; \
+ block_prev[2] = block[2]; \
+ block_prev[3] = block[3]; \
+ \
+ dst += 16; \
+ src += 16; \
+ } \
+ \
+ SILC_PUT32_MSB(block[0], &iv[0]); \
+ SILC_PUT32_MSB(block[1], &iv[4]); \
+ SILC_PUT32_MSB(block[2], &iv[8]); \
+ SILC_PUT32_MSB(block[3], &iv[12]); \
+} while(0)
-#define SILC_CBC_MSB_GET_IV(d, s, l) \
-do { \
- SILC_GET32_MSB(d[0], &s[0]); \
- SILC_GET32_MSB(d[1], &s[4]); \
- if (l > 8) { \
- SILC_GET32_MSB(d[2], &s[8]); \
- SILC_GET32_MSB(d[3], &s[12]); \
- } \
-} while(0);
+/* CBC mode 64-bit block, MSB, 32-bit block argument must be encrypted */
-#define SILC_CBC_MSB_PUT_IV(s, d, l) \
-do { \
- SILC_PUT32_MSB(s[0], &d[0]); \
- SILC_PUT32_MSB(s[1], &d[4]); \
- if (l > 8) { \
- SILC_PUT32_MSB(s[2], &d[8]); \
- SILC_PUT32_MSB(s[3], &d[12]); \
- } \
-} while(0);
+#define SILC_CBC_ENC_MSB_64_32(len, iv, block, src, dst, i, enc) \
+do { \
+ SILC_ASSERT((len & (8 - 1)) == 0); \
+ if (len & (8 - 1)) \
+ return FALSE; \
+ \
+ SILC_GET32_MSB(block[0], &iv[0]); \
+ SILC_GET32_MSB(block[1], &iv[4]); \
+ \
+ for (i = 0; i < len; i += 8) { \
+ SILC_GET32_X_MSB(block[0], &src[0]); \
+ SILC_GET32_X_MSB(block[1], &src[4]); \
+ \
+ enc; \
+ \
+ SILC_PUT32_MSB(block[0], &dst[0]); \
+ SILC_PUT32_MSB(block[1], &dst[4]); \
+ \
+ dst += 8; \
+ src += 8; \
+ } \
+ \
+ SILC_PUT32_MSB(block[0], &iv[0]); \
+ SILC_PUT32_MSB(block[1], &iv[4]); \
+} while(0)
-#define SILC_CBC_MSB_ENC_PRE(d, s, l) \
-do { \
- SILC_GET32_X_MSB(d[0], &s[0]); \
- SILC_GET32_X_MSB(d[1], &s[4]); \
- if (l > 8) { \
- SILC_GET32_X_MSB(d[2], &s[8]); \
- SILC_GET32_X_MSB(d[3], &s[12]); \
- } \
-} while(0);
+/* CBC mode 64-bit block, MSB, decrypt block to block_dec. */
-#define SILC_CBC_MSB_ENC_POST(s, d, t, l) \
-do { \
- SILC_PUT32_MSB(s[0], &d[0]); \
- SILC_PUT32_MSB(s[1], &d[4]); \
- if (l > 8) { \
- SILC_PUT32_MSB(s[2], &d[8]); \
- SILC_PUT32_MSB(s[3], &d[12]); \
- } \
- \
- d += l; \
- t += l; \
-} while(0);
+#define SILC_CBC_DEC_MSB_64_32(len, iv, block_prev, block, \
+ block_dec, src, dst, i, dec) \
+do { \
+ if (len & (8 - 1)) \
+ return FALSE; \
+ \
+ SILC_GET32_MSB(block_prev[0], &iv[0]); \
+ SILC_GET32_MSB(block_prev[1], &iv[4]); \
+ \
+ for (i = 0; i < len; i += 8) { \
+ SILC_GET32_MSB(block[0], &src[0]); \
+ SILC_GET32_MSB(block[1], &src[4]); \
+ \
+ dec; \
+ \
+ block_dec[0] ^= block_prev[0]; \
+ block_dec[1] ^= block_prev[1]; \
+ \
+ SILC_PUT32_MSB(block_dec[0], &dst[0]); \
+ SILC_PUT32_MSB(block_dec[1], &dst[4]); \
+ \
+ block_prev[0] = block[0]; \
+ block_prev[1] = block[1]; \
+ \
+ dst += 8; \
+ src += 8; \
+ } \
+ \
+ SILC_PUT32_MSB(block[0], &iv[0]); \
+ SILC_PUT32_MSB(block[1], &iv[4]); \
+} while(0)
-#define SILC_CBC_MSB_DEC_PRE(d, s, l) \
-do { \
- SILC_GET32_MSB(d[0], &s[0]); \
- SILC_GET32_MSB(d[1], &s[4]); \
- if (l > 8) { \
- SILC_GET32_MSB(d[2], &s[8]); \
- SILC_GET32_MSB(d[3], &s[12]); \
- } \
-} while(0);
-#define SILC_CBC_MSB_DEC_POST(s, d, p, t, siv, l) \
-do { \
- s[0] ^= siv[0]; \
- s[1] ^= siv[1]; \
- if (l > 8) { \
- s[2] ^= siv[2]; \
- s[3] ^= siv[3]; \
- } \
- \
- SILC_PUT32_MSB(s[0], &d[0]); \
- SILC_PUT32_MSB(s[1], &d[4]); \
- if (l > 8) { \
- SILC_PUT32_MSB(s[2], &d[8]); \
- SILC_PUT32_MSB(s[3], &d[12]); \
- } \
- \
- siv[0] = t[0]; \
- siv[1] = t[1]; \
- if (l > 8) { \
- siv[2] = t[2]; \
- siv[3] = t[3]; \
- } \
- \
- d += l; \
- p += l; \
-} while(0);
+/* CTR mode 128-bit block, MSB, MSB counter, the 8-bit enc_ctr argument must
+ be encrypted */
+
+#define SILC_CTR_MSB_128_8(iv, 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]; \
+ \
+ 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); \
+ \
+ enc; \
+ 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, MSB, MSB counter, the 32-bit ctr argument must
+ be encrypted to enc_ctr */
+
+#define SILC_CTR_MSB_128_32(iv, 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]; \
+ \
+ 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 */
+
+#define SILC_CTR_LSB_128_32(iv, 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]; \
+ \
+ 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]); \
+ \
+ 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); \
+ pad = 0; \
+ } \
+ *dst++ = *src++ ^ iv[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 */
+
+#define SILC_CTR_MSB_64_32(iv, ctr, 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]; \
+ \
+ enc; \
+ SILC_PUT32_MSB(enc_ctr[0], iv); \
+ SILC_PUT32_MSB(enc_ctr[1], iv + 4); \
+ pad = 0; \
+ } \
+ *dst++ = *src++ ^ iv[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. */
+
+#define SILC_CFB_ENC_LSB_128_32(iv, cfb, pad, src, dst, enc) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 16) { \
+ SILC_GET32_LSB(cfb[0], iv); \
+ SILC_GET32_LSB(cfb[1], iv + 4); \
+ SILC_GET32_LSB(cfb[2], iv + 8); \
+ SILC_GET32_LSB(cfb[3], iv + 12); \
+ \
+ enc; \
+ \
+ SILC_PUT32_LSB(cfb[0], iv); \
+ SILC_PUT32_LSB(cfb[1], iv + 4); \
+ SILC_PUT32_LSB(cfb[2], iv + 8); \
+ SILC_PUT32_LSB(cfb[3], iv + 12); \
+ pad = 0; \
+ } \
+ iv[pad] = (*dst = *src ^ iv[pad]); \
+ dst++; \
+ src++; \
+ pad++; \
+ } \
+} while(0)
+
+/* CFB 128-bit block, LSB, the 32-bit cfb argument must be decrypted. */
+
+#define SILC_CFB_DEC_LSB_128_32(iv, cfb, pad, src, dst, dec) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 16) { \
+ SILC_GET32_LSB(cfb[0], iv); \
+ SILC_GET32_LSB(cfb[1], iv + 4); \
+ SILC_GET32_LSB(cfb[2], iv + 8); \
+ SILC_GET32_LSB(cfb[3], iv + 12); \
+ \
+ dec; \
+ \
+ SILC_PUT32_LSB(cfb[0], iv); \
+ SILC_PUT32_LSB(cfb[1], iv + 4); \
+ SILC_PUT32_LSB(cfb[2], iv + 8); \
+ SILC_PUT32_LSB(cfb[3], iv + 12); \
+ pad = 0; \
+ } \
+ iv[pad] = *src ^ iv[pad]; \
+ *dst = iv[pad]; \
+ iv[pad++] = *src; \
+ dst++; \
+ src++; \
+ } \
+} while(0)
+
+/* CFB 128-bit block, MSB, the 32-bit cfb argument must be encrypted. */
+
+#define SILC_CFB_ENC_MSB_128_32(iv, cfb, pad, src, dst, enc) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 16) { \
+ SILC_GET32_MSB(cfb[0], iv); \
+ SILC_GET32_MSB(cfb[1], iv + 4); \
+ SILC_GET32_MSB(cfb[2], iv + 8); \
+ SILC_GET32_MSB(cfb[3], iv + 12); \
+ \
+ enc; \
+ \
+ SILC_PUT32_MSB(cfb[0], iv); \
+ SILC_PUT32_MSB(cfb[1], iv + 4); \
+ SILC_PUT32_MSB(cfb[2], iv + 8); \
+ SILC_PUT32_MSB(cfb[3], iv + 12); \
+ pad = 0; \
+ } \
+ iv[pad] = (*dst = *src ^ iv[pad]); \
+ dst++; \
+ src++; \
+ pad++; \
+ } \
+} while(0)
+
+/* CFB 128-bit block, MSB, the 32-bit cfb argument must be decrypted. */
+
+#define SILC_CFB_DEC_MSB_128_32(iv, cfb, pad, src, dst, dec) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 16) { \
+ SILC_GET32_MSB(cfb[0], iv); \
+ SILC_GET32_MSB(cfb[1], iv + 4); \
+ SILC_GET32_MSB(cfb[2], iv + 8); \
+ SILC_GET32_MSB(cfb[3], iv + 12); \
+ \
+ dec; \
+ \
+ SILC_PUT32_MSB(cfb[0], iv); \
+ SILC_PUT32_MSB(cfb[1], iv + 4); \
+ SILC_PUT32_MSB(cfb[2], iv + 8); \
+ SILC_PUT32_MSB(cfb[3], iv + 12); \
+ pad = 0; \
+ } \
+ iv[pad] = *src ^ iv[pad]; \
+ *dst = iv[pad]; \
+ iv[pad++] = *src; \
+ dst++; \
+ src++; \
+ } \
+} while(0)
+
+/* CFB 64-bit block, MSB, the 32-bit cfb argument must be encrypted. */
+
+#define SILC_CFB_ENC_MSB_64_32(iv, cfb, pad, src, dst, enc) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 8) { \
+ SILC_GET32_MSB(cfb[0], iv); \
+ SILC_GET32_MSB(cfb[1], iv + 4); \
+ \
+ enc; \
+ \
+ SILC_PUT32_MSB(cfb[0], iv); \
+ SILC_PUT32_MSB(cfb[1], iv + 4); \
+ pad = 0; \
+ } \
+ iv[pad] = (*dst = *src ^ iv[pad]); \
+ dst++; \
+ src++; \
+ pad++; \
+ } \
+} while(0)
+
+/* CFB 64-bit block, MSB, the 32-bit cfb argument must be decrypted. */
+
+#define SILC_CFB_DEC_MSB_64_32(iv, cfb, pad, src, dst, dec) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 8) { \
+ SILC_GET32_MSB(cfb[0], iv); \
+ SILC_GET32_MSB(cfb[1], iv + 4); \
+ \
+ dec; \
+ \
+ SILC_PUT32_MSB(cfb[0], iv); \
+ SILC_PUT32_MSB(cfb[1], iv + 4); \
+ pad = 0; \
+ } \
+ iv[pad] = *src ^ iv[pad]; \
+ *dst = iv[pad]; \
+ iv[pad++] = *src; \
+ dst++; \
+ src++; \
+ } \
+} while(0)
+
+/* CFB 128-bit block, MSB, the 8-bit iv argument must be encrypted. */
+
+#define SILC_CFB_ENC_MSB_128_8(iv, pad, src, dst, enc) \
+do { \
+ while (len-- > 0) { \
+ if (pad == 16) { \
+ enc; \
+ pad = 0; \
+ } \
+ iv[pad] = (*dst = *src ^ iv[pad]); \
+ dst++; \
+ src++; \
+ pad++; \
+ } \
+} while(0)
+
+/* CFB 128-bit block, MSB, the 8-bit iv argument must be decrypted. */
+
+#define SILC_CFB_DEC_MSB_128_8(iv, pad, src, dst, dec) \
+ do { \
+ while (len-- > 0) { \
+ if (pad == 16) { \
+ dec; \
+ pad = 0; \
+ } \
+ iv[pad] = *src ^ iv[pad]; \
+ *dst = iv[pad]; \
+ iv[pad++] = *src; \
+ dst++; \
+ src++; \
+ } \
+} while(0)
#endif
projects / silc.git / blobdiff