+++ /dev/null
-/* Modified for SILC. -Pekka */x\r
-\r
-/* This is an independent implementation of the encryption algorithm: */\r
-/* */\r
-/* Serpent by Ross Anderson, Eli Biham and Lars Knudsen */\r
-/* */\r
-/* which is a candidate algorithm in the Advanced Encryption Standard */\r
-/* programme of the US National Institute of Standards and Technology. */\r
-/* */\r
-/* Copyright in this implementation is held by Dr B R Gladman but I */\r
-/* hereby give permission for its free direct or derivative use subject */\r
-/* to acknowledgment of its origin and compliance with any conditions */\r
-/* that the originators of the algorithm place on its exploitation. */\r
-/* */\r
-/* Dr Brian Gladman (gladman@seven77.demon.co.uk) 14th January 1999 */\r
-\r
-/* Timing data for Serpent (serpent.c)\r
-\r
-Core timing without I/O endian conversion:\r
-\r
-128 bit key:\r
-Key Setup: 2402 cycles\r
-Encrypt: 952 cycles = 26.9 mbits/sec\r
-Decrypt: 914 cycles = 28.0 mbits/sec\r
-Mean: 933 cycles = 27.4 mbits/sec\r
-\r
-192 bit key:\r
-Key Setup: 2449 cycles\r
-Encrypt: 952 cycles = 26.9 mbits/sec\r
-Decrypt: 914 cycles = 28.0 mbits/sec\r
-Mean: 933 cycles = 27.4 mbits/sec\r
-\r
-256 bit key:\r
-Key Setup: 2349 cycles\r
-Encrypt: 952 cycles = 26.9 mbits/sec\r
-Decrypt: 914 cycles = 28.0 mbits/sec\r
-Mean: 933 cycles = 27.4 mbits/sec\r
-\r
-Full timing with I/O endian conversion:\r
-\r
-128 bit key:\r
-Key Setup: 2415 cycles\r
-Encrypt: 985 cycles = 26.0 mbits/sec\r
-Decrypt: 954 cycles = 26.8 mbits/sec\r
-Mean: 970 cycles = 26.4 mbits/sec\r
-\r
-192 bit key:\r
-Key Setup: 2438 cycles\r
-Encrypt: 985 cycles = 26.0 mbits/sec\r
-Decrypt: 954 cycles = 26.8 mbits/sec\r
-Mean: 970 cycles = 26.4 mbits/sec\r
-\r
-256 bit key:\r
-Key Setup: 2463 cycles\r
-Encrypt: 985 cycles = 26.0 mbits/sec\r
-Decrypt: 954 cycles = 26.8 mbits/sec\r
-Mean: 970 cycles = 26.4 mbits/sec\r
-\r
-*/\r
-\r
-#include <stdio.h>\r
-#include <sys/types.h>\r
-#include "serpent_internal.h"\r
-\r
-/* Partially optimised Serpent S Box boolean functions derived */\r
-/* using a recursive descent analyser but without a full search */\r
-/* of all subtrees. This set of S boxes is the result of work */\r
-/* by Sam Simpson and Brian Gladman using the spare time on a */\r
-/* cluster of high capacity servers to search for S boxes with */\r
-/* this customised search engine. */\r
-/* */\r
-/* Copyright: Dr B. R Gladman (gladman@seven77.demon.co.uk) */\r
-/* and Sam Simpson (s.simpson@mia.co.uk) */ \r
-/* 17th December 1998 */\r
-/* */\r
-/* We hereby give permission for information in this file to be */\r
-/* used freely subject only to acknowledgement of its origin */\r
-\r
-/* 15 terms */\r
-\r
-#define sb0(a,b,c,d,e,f,g,h) \\r
- t1 = a ^ d; \\r
- t2 = a & d; \\r
- t3 = c ^ t1; \\r
- t6 = b & t1; \\r
- t4 = b ^ t3; \\r
- t10 = ~t3; \\r
- h = t2 ^ t4; \\r
- t7 = a ^ t6; \\r
- t14 = ~t7; \\r
- t8 = c | t7; \\r
- t11 = t3 ^ t7; \\r
- g = t4 ^ t8; \\r
- t12 = h & t11; \\r
- f = t10 ^ t12; \\r
- e = t12 ^ t14\r
-\r
-/* 15 terms */\r
-\r
-#define ib0(a,b,c,d,e,f,g,h) \\r
- t1 = ~a; \\r
- t2 = a ^ b; \\r
- t3 = t1 | t2; \\r
- t4 = d ^ t3; \\r
- t7 = d & t2; \\r
- t5 = c ^ t4; \\r
- t8 = t1 ^ t7; \\r
- g = t2 ^ t5; \\r
- t11 = a & t4; \\r
- t9 = g & t8; \\r
- t14 = t5 ^ t8; \\r
- f = t4 ^ t9; \\r
- t12 = t5 | f; \\r
- h = t11 ^ t12; \\r
- e = h ^ t14\r
-\r
-/* 14 terms! */\r
-\r
-#define sb1(a,b,c,d,e,f,g,h) \\r
- t1 = ~a; \\r
- t2 = b ^ t1; \\r
- t3 = a | t2; \\r
- t4 = d | t2; \\r
- t5 = c ^ t3; \\r
- g = d ^ t5; \\r
- t7 = b ^ t4; \\r
- t8 = t2 ^ g; \\r
- t9 = t5 & t7; \\r
- h = t8 ^ t9; \\r
- t11 = t5 ^ t7; \\r
- f = h ^ t11; \\r
- t13 = t8 & t11; \\r
- e = t5 ^ t13\r
-\r
-/* 17 terms */\r
-\r
-#define ib1(a,b,c,d,e,f,g,h) \\r
- t1 = a ^ d; \\r
- t2 = a & b; \\r
- t3 = b ^ c; \\r
- t4 = a ^ t3; \\r
- t5 = b | d; \\r
- t7 = c | t1; \\r
- h = t4 ^ t5; \\r
- t8 = b ^ t7; \\r
- t11 = ~t2; \\r
- t9 = t4 & t8; \\r
- f = t1 ^ t9; \\r
- t13 = t9 ^ t11; \\r
- t12 = h & f; \\r
- g = t12 ^ t13; \\r
- t15 = a & d; \\r
- t16 = c ^ t13; \\r
- e = t15 ^ t16\r
-\r
-/* 16 terms */\r
-\r
-#define sb2(a,b,c,d,e,f,g,h) \\r
- t1 = ~a; \\r
- t2 = b ^ d; \\r
- t3 = c & t1; \\r
- t13 = d | t1; \\r
- e = t2 ^ t3; \\r
- t5 = c ^ t1; \\r
- t6 = c ^ e; \\r
- t7 = b & t6; \\r
- t10 = e | t5; \\r
- h = t5 ^ t7; \\r
- t9 = d | t7; \\r
- t11 = t9 & t10; \\r
- t14 = t2 ^ h; \\r
- g = a ^ t11; \\r
- t15 = g ^ t13; \\r
- f = t14 ^ t15\r
-\r
-/* 16 terms */\r
-\r
-#define ib2(a,b,c,d,e,f,g,h) \\r
- t1 = b ^ d; \\r
- t2 = ~t1; \\r
- t3 = a ^ c; \\r
- t4 = c ^ t1; \\r
- t7 = a | t2; \\r
- t5 = b & t4; \\r
- t8 = d ^ t7; \\r
- t11 = ~t4; \\r
- e = t3 ^ t5; \\r
- t9 = t3 | t8; \\r
- t14 = d & t11; \\r
- h = t1 ^ t9; \\r
- t12 = e | h; \\r
- f = t11 ^ t12; \\r
- t15 = t3 ^ t12; \\r
- g = t14 ^ t15\r
-\r
-/* 17 terms */\r
-\r
-#define sb3(a,b,c,d,e,f,g,h) \\r
- t1 = a ^ c; \\r
- t2 = d ^ t1; \\r
- t3 = a & t2; \\r
- t4 = d ^ t3; \\r
- t5 = b & t4; \\r
- g = t2 ^ t5; \\r
- t7 = a | g; \\r
- t8 = b | d; \\r
- t11 = a | d; \\r
- t9 = t4 & t7; \\r
- f = t8 ^ t9; \\r
- t12 = b ^ t11; \\r
- t13 = g ^ t9; \\r
- t15 = t3 ^ t8; \\r
- h = t12 ^ t13; \\r
- t16 = c & t15; \\r
- e = t12 ^ t16\r
-\r
-/* 16 term solution that performs less well than 17 term one\r
- in my environment (PPro/PII) \r
-\r
-#define sb3(a,b,c,d,e,f,g,h) \\r
- t1 = a ^ b; \\r
- t2 = a & c; \\r
- t3 = a | d; \\r
- t4 = c ^ d; \\r
- t5 = t1 & t3; \\r
- t6 = t2 | t5; \\r
- g = t4 ^ t6; \\r
- t8 = b ^ t3; \\r
- t9 = t6 ^ t8; \\r
- t10 = t4 & t9; \\r
- e = t1 ^ t10; \\r
- t12 = g & e; \\r
- f = t9 ^ t12; \\r
- t14 = b | d; \\r
- t15 = t4 ^ t12; \\r
- h = t14 ^ t15\r
-*/\r
-\r
-/* 17 terms */\r
-\r
-#define ib3(a,b,c,d,e,f,g,h) \\r
- t1 = b ^ c; \\r
- t2 = b | c; \\r
- t3 = a ^ c; \\r
- t7 = a ^ d; \\r
- t4 = t2 ^ t3; \\r
- t5 = d | t4; \\r
- t9 = t2 ^ t7; \\r
- e = t1 ^ t5; \\r
- t8 = t1 | t5; \\r
- t11 = a & t4; \\r
- g = t8 ^ t9; \\r
- t12 = e | t9; \\r
- f = t11 ^ t12; \\r
- t14 = a & g; \\r
- t15 = t2 ^ t14; \\r
- t16 = e & t15; \\r
- h = t4 ^ t16\r
-\r
-/* 15 terms */\r
-\r
-#define sb4(a,b,c,d,e,f,g,h) \\r
- t1 = a ^ d; \\r
- t2 = d & t1; \\r
- t3 = c ^ t2; \\r
- t4 = b | t3; \\r
- h = t1 ^ t4; \\r
- t6 = ~b; \\r
- t7 = t1 | t6; \\r
- e = t3 ^ t7; \\r
- t9 = a & e; \\r
- t10 = t1 ^ t6; \\r
- t11 = t4 & t10; \\r
- g = t9 ^ t11; \\r
- t13 = a ^ t3; \\r
- t14 = t10 & g; \\r
- f = t13 ^ t14\r
-\r
-/* 17 terms */\r
-\r
-#define ib4(a,b,c,d,e,f,g,h) \\r
- t1 = c ^ d; \\r
- t2 = c | d; \\r
- t3 = b ^ t2; \\r
- t4 = a & t3; \\r
- f = t1 ^ t4; \\r
- t6 = a ^ d; \\r
- t7 = b | d; \\r
- t8 = t6 & t7; \\r
- h = t3 ^ t8; \\r
- t10 = ~a; \\r
- t11 = c ^ h; \\r
- t12 = t10 | t11;\\r
- e = t3 ^ t12; \\r
- t14 = c | t4; \\r
- t15 = t7 ^ t14; \\r
- t16 = h | t10; \\r
- g = t15 ^ t16\r
-\r
-/* 16 terms */\r
-\r
-#define sb5(a,b,c,d,e,f,g,h) \\r
- t1 = ~a; \\r
- t2 = a ^ b; \\r
- t3 = a ^ d; \\r
- t4 = c ^ t1; \\r
- t5 = t2 | t3; \\r
- e = t4 ^ t5; \\r
- t7 = d & e; \\r
- t8 = t2 ^ e; \\r
- t10 = t1 | e; \\r
- f = t7 ^ t8; \\r
- t11 = t2 | t7; \\r
- t12 = t3 ^ t10; \\r
- t14 = b ^ t7; \\r
- g = t11 ^ t12; \\r
- t15 = f & t12; \\r
- h = t14 ^ t15\r
-\r
-/* 16 terms */\r
-\r
-#define ib5(a,b,c,d,e,f,g,h) \\r
- t1 = ~c; \\r
- t2 = b & t1; \\r
- t3 = d ^ t2; \\r
- t4 = a & t3; \\r
- t5 = b ^ t1; \\r
- h = t4 ^ t5; \\r
- t7 = b | h; \\r
- t8 = a & t7; \\r
- f = t3 ^ t8; \\r
- t10 = a | d; \\r
- t11 = t1 ^ t7; \\r
- e = t10 ^ t11; \\r
- t13 = a ^ c; \\r
- t14 = b & t10; \\r
- t15 = t4 | t13; \\r
- g = t14 ^ t15\r
-\r
-/* 15 terms */\r
-\r
-#define sb6(a,b,c,d,e,f,g,h) \\r
- t1 = ~a; \\r
- t2 = a ^ d; \\r
- t3 = b ^ t2; \\r
- t4 = t1 | t2; \\r
- t5 = c ^ t4; \\r
- f = b ^ t5; \\r
- t13 = ~t5; \\r
- t7 = t2 | f; \\r
- t8 = d ^ t7; \\r
- t9 = t5 & t8; \\r
- g = t3 ^ t9; \\r
- t11 = t5 ^ t8; \\r
- e = g ^ t11; \\r
- t14 = t3 & t11; \\r
- h = t13 ^ t14\r
-\r
-/* 15 terms */\r
-\r
-#define ib6(a,b,c,d,e,f,g,h) \\r
- t1 = ~a; \\r
- t2 = a ^ b; \\r
- t3 = c ^ t2; \\r
- t4 = c | t1; \\r
- t5 = d ^ t4; \\r
- t13 = d & t1; \\r
- f = t3 ^ t5; \\r
- t7 = t3 & t5; \\r
- t8 = t2 ^ t7; \\r
- t9 = b | t8; \\r
- h = t5 ^ t9; \\r
- t11 = b | h; \\r
- e = t8 ^ t11; \\r
- t14 = t3 ^ t11; \\r
- g = t13 ^ t14\r
-\r
-/* 17 terms */\r
-\r
-#define sb7(a,b,c,d,e,f,g,h) \\r
- t1 = ~c; \\r
- t2 = b ^ c; \\r
- t3 = b | t1; \\r
- t4 = d ^ t3; \\r
- t5 = a & t4; \\r
- t7 = a ^ d; \\r
- h = t2 ^ t5; \\r
- t8 = b ^ t5; \\r
- t9 = t2 | t8; \\r
- t11 = d & t3; \\r
- f = t7 ^ t9; \\r
- t12 = t5 ^ f; \\r
- t15 = t1 | t4; \\r
- t13 = h & t12; \\r
- g = t11 ^ t13; \\r
- t16 = t12 ^ g; \\r
- e = t15 ^ t16\r
-\r
-/* 17 terms */\r
-\r
-#define ib7(a,b,c,d,e,f,g,h) \\r
- t1 = a & b; \\r
- t2 = a | b; \\r
- t3 = c | t1; \\r
- t4 = d & t2; \\r
- h = t3 ^ t4; \\r
- t6 = ~d; \\r
- t7 = b ^ t4; \\r
- t8 = h ^ t6; \\r
- t11 = c ^ t7; \\r
- t9 = t7 | t8; \\r
- f = a ^ t9; \\r
- t12 = d | f; \\r
- e = t11 ^ t12; \\r
- t14 = a & h; \\r
- t15 = t3 ^ f; \\r
- t16 = e ^ t14; \\r
- g = t15 ^ t16\r
-\r
-#define k_xor(r,a,b,c,d) \\r
- a ^= l_key[4 * r + 8]; \\r
- b ^= l_key[4 * r + 9]; \\r
- c ^= l_key[4 * r + 10]; \\r
- d ^= l_key[4 * r + 11]\r
-\r
-#define k_set(r,a,b,c,d) \\r
- a = l_key[4 * r + 8]; \\r
- b = l_key[4 * r + 9]; \\r
- c = l_key[4 * r + 10]; \\r
- d = l_key[4 * r + 11]\r
-\r
-#define k_get(r,a,b,c,d) \\r
- l_key[4 * r + 8] = a; \\r
- l_key[4 * r + 9] = b; \\r
- l_key[4 * r + 10] = c; \\r
- l_key[4 * r + 11] = d\r
-\r
-/* the linear transformation and its inverse */\r
-\r
-#define rot(a,b,c,d) \\r
- a = rotl(a, 13); \\r
- c = rotl(c, 3); \\r
- d ^= c ^ (a << 3); \\r
- b ^= a ^ c; \\r
- d = rotl(d, 7); \\r
- b = rotl(b, 1); \\r
- a ^= b ^ d; \\r
- c ^= d ^ (b << 7); \\r
- a = rotl(a, 5); \\r
- c = rotl(c, 22)\r
-\r
-#define irot(a,b,c,d) \\r
- c = rotr(c, 22); \\r
- a = rotr(a, 5); \\r
- c ^= d ^ (b << 7); \\r
- a ^= b ^ d; \\r
- d = rotr(d, 7); \\r
- b = rotr(b, 1); \\r
- d ^= c ^ (a << 3); \\r
- b ^= a ^ c; \\r
- c = rotr(c, 3); \\r
- a = rotr(a, 13)\r
-\r
-/* initialise the key schedule from the user supplied key */\r
-\r
-u4byte *serpent_set_key(SerpentContext *ctx,\r
- const u4byte in_key[], const u4byte key_len)\r
-{ \r
- u4byte i,lk,a,b,c,d,e,f,g,h;\r
- u4byte t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;\r
- u4byte *l_key = ctx->l_key;\r
-\r
- if(key_len < 0 || key_len > 256)\r
-\r
- return (u4byte*)0;\r
-\r
- i = 0; lk = (key_len + 31) / 32;\r
- \r
- while(i < lk)\r
- {\r
-#ifdef BLOCK_SWAP\r
- l_key[i] = io_swap(in_key[lk - i - 1]);\r
-#else\r
- l_key[i] = in_key[i];\r
-#endif \r
- i++;\r
- }\r
-\r
- if(key_len < 256)\r
- {\r
- while(i < 8)\r
-\r
- l_key[i++] = 0;\r
-\r
- i = key_len / 32; lk = 1 << key_len % 32; \r
-\r
- l_key[i] = l_key[i] & (lk - 1) | lk;\r
- }\r
-\r
- for(i = 0; i < 132; ++i)\r
- {\r
- lk = l_key[i] ^ l_key[i + 3] ^ l_key[i + 5] \r
- ^ l_key[i + 7] ^ 0x9e3779b9 ^ i;\r
-\r
- l_key[i + 8] = (lk << 11) | (lk >> 21); \r
- }\r
-\r
- k_set( 0,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get( 0,e,f,g,h);\r
- k_set( 1,a,b,c,d);sb2(a,b,c,d,e,f,g,h);k_get( 1,e,f,g,h);\r
- k_set( 2,a,b,c,d);sb1(a,b,c,d,e,f,g,h);k_get( 2,e,f,g,h);\r
- k_set( 3,a,b,c,d);sb0(a,b,c,d,e,f,g,h);k_get( 3,e,f,g,h);\r
- k_set( 4,a,b,c,d);sb7(a,b,c,d,e,f,g,h);k_get( 4,e,f,g,h);\r
- k_set( 5,a,b,c,d);sb6(a,b,c,d,e,f,g,h);k_get( 5,e,f,g,h);\r
- k_set( 6,a,b,c,d);sb5(a,b,c,d,e,f,g,h);k_get( 6,e,f,g,h);\r
- k_set( 7,a,b,c,d);sb4(a,b,c,d,e,f,g,h);k_get( 7,e,f,g,h);\r
- k_set( 8,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get( 8,e,f,g,h);\r
- k_set( 9,a,b,c,d);sb2(a,b,c,d,e,f,g,h);k_get( 9,e,f,g,h);\r
- k_set(10,a,b,c,d);sb1(a,b,c,d,e,f,g,h);k_get(10,e,f,g,h);\r
- k_set(11,a,b,c,d);sb0(a,b,c,d,e,f,g,h);k_get(11,e,f,g,h);\r
- k_set(12,a,b,c,d);sb7(a,b,c,d,e,f,g,h);k_get(12,e,f,g,h);\r
- k_set(13,a,b,c,d);sb6(a,b,c,d,e,f,g,h);k_get(13,e,f,g,h);\r
- k_set(14,a,b,c,d);sb5(a,b,c,d,e,f,g,h);k_get(14,e,f,g,h);\r
- k_set(15,a,b,c,d);sb4(a,b,c,d,e,f,g,h);k_get(15,e,f,g,h);\r
- k_set(16,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get(16,e,f,g,h);\r
- k_set(17,a,b,c,d);sb2(a,b,c,d,e,f,g,h);k_get(17,e,f,g,h);\r
- k_set(18,a,b,c,d);sb1(a,b,c,d,e,f,g,h);k_get(18,e,f,g,h);\r
- k_set(19,a,b,c,d);sb0(a,b,c,d,e,f,g,h);k_get(19,e,f,g,h);\r
- k_set(20,a,b,c,d);sb7(a,b,c,d,e,f,g,h);k_get(20,e,f,g,h);\r
- k_set(21,a,b,c,d);sb6(a,b,c,d,e,f,g,h);k_get(21,e,f,g,h);\r
- k_set(22,a,b,c,d);sb5(a,b,c,d,e,f,g,h);k_get(22,e,f,g,h);\r
- k_set(23,a,b,c,d);sb4(a,b,c,d,e,f,g,h);k_get(23,e,f,g,h);\r
- k_set(24,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get(24,e,f,g,h);\r
- k_set(25,a,b,c,d);sb2(a,b,c,d,e,f,g,h);k_get(25,e,f,g,h);\r
- k_set(26,a,b,c,d);sb1(a,b,c,d,e,f,g,h);k_get(26,e,f,g,h);\r
- k_set(27,a,b,c,d);sb0(a,b,c,d,e,f,g,h);k_get(27,e,f,g,h);\r
- k_set(28,a,b,c,d);sb7(a,b,c,d,e,f,g,h);k_get(28,e,f,g,h);\r
- k_set(29,a,b,c,d);sb6(a,b,c,d,e,f,g,h);k_get(29,e,f,g,h);\r
- k_set(30,a,b,c,d);sb5(a,b,c,d,e,f,g,h);k_get(30,e,f,g,h);\r
- k_set(31,a,b,c,d);sb4(a,b,c,d,e,f,g,h);k_get(31,e,f,g,h);\r
- k_set(32,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get(32,e,f,g,h);\r
-\r
- return l_key;\r
-};\r
-\r
-/* encrypt a block of text */\r
-\r
-void serpent_encrypt(SerpentContext *ctx,\r
- const u4byte in_blk[4], u4byte out_blk[])\r
-{ \r
- u4byte a,b,c,d,e,f,g,h;\r
- u4byte t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;\r
- u4byte *l_key = ctx->l_key;\r
-\r
-#ifdef BLOCK_SWAP\r
- a = io_swap(in_blk[3]); b = io_swap(in_blk[2]); \r
- c = io_swap(in_blk[1]); d = io_swap(in_blk[0]);\r
-#else\r
- a = in_blk[0]; b = in_blk[1]; c = in_blk[2]; d = in_blk[3];\r
-#endif\r
-\r
- k_xor( 0,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor( 1,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor( 2,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor( 3,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor( 4,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor( 5,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor( 6,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor( 7,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor( 8,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor( 9,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(10,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(11,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(12,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(13,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(14,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(15,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(16,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(17,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(18,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(19,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(20,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(21,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(22,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(23,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(24,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(25,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(26,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(27,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(28,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(29,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d); \r
- k_xor(30,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h); \r
- k_xor(31,e,f,g,h); sb7(e,f,g,h,a,b,c,d); k_xor(32,a,b,c,d); \r
- \r
-#ifdef BLOCK_SWAP\r
- out_blk[3] = io_swap(a); out_blk[2] = io_swap(b); \r
- out_blk[1] = io_swap(c); out_blk[0] = io_swap(d);\r
-#else\r
- out_blk[0] = a; out_blk[1] = b; out_blk[2] = c; out_blk[3] = d;\r
-#endif\r
-};\r
-\r
-/* decrypt a block of text */\r
-\r
-void serpent_decrypt(SerpentContext *ctx,\r
- const u4byte in_blk[4], u4byte out_blk[4])\r
-{ \r
- u4byte a,b,c,d,e,f,g,h;\r
- u4byte t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;\r
- u4byte *l_key = ctx->l_key;\r
- \r
-#ifdef BLOCK_SWAP\r
- a = io_swap(in_blk[3]); b = io_swap(in_blk[2]); \r
- c = io_swap(in_blk[1]); d = io_swap(in_blk[0]);\r
-#else\r
- a = in_blk[0]; b = in_blk[1]; c = in_blk[2]; d = in_blk[3];\r
-#endif\r
-\r
- k_xor(32,a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(31,e,f,g,h);\r
- irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(30,a,b,c,d);\r
- irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(29,e,f,g,h);\r
- irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(28,a,b,c,d);\r
- irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(27,e,f,g,h);\r
- irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(26,a,b,c,d);\r
- irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor(25,e,f,g,h);\r
- irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor(24,a,b,c,d);\r
- irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(23,e,f,g,h);\r
- irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(22,a,b,c,d);\r
- irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(21,e,f,g,h);\r
- irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(20,a,b,c,d);\r
- irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(19,e,f,g,h);\r
- irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(18,a,b,c,d);\r
- irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor(17,e,f,g,h);\r
- irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor(16,a,b,c,d);\r
- irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(15,e,f,g,h);\r
- irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(14,a,b,c,d);\r
- irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(13,e,f,g,h);\r
- irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(12,a,b,c,d);\r
- irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(11,e,f,g,h);\r
- irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(10,a,b,c,d);\r
- irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor( 9,e,f,g,h);\r
- irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor( 8,a,b,c,d);\r
- irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor( 7,e,f,g,h);\r
- irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor( 6,a,b,c,d);\r
- irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor( 5,e,f,g,h);\r
- irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor( 4,a,b,c,d);\r
- irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor( 3,e,f,g,h);\r
- irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor( 2,a,b,c,d);\r
- irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor( 1,e,f,g,h);\r
- irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor( 0,a,b,c,d);\r
- \r
-#ifdef BLOCK_SWAP\r
- out_blk[3] = io_swap(a); out_blk[2] = io_swap(b); \r
- out_blk[1] = io_swap(c); out_blk[0] = io_swap(d);\r
-#else\r
- out_blk[0] = a; out_blk[1] = b; out_blk[2] = c; out_blk[3] = d;\r
-#endif\r
-};\r
projects / silc.git / blobdiff