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- /* Copyright (C) 1992 Eric Young - see COPYING for more details */
- /* Collected from libdes and modified for SECURE RPC by Martin Kuck 1994 */
- #include <string.h>
- #include "des.h"
-
-
- static unsigned long des_SPtrans[8][64]={
- /* nibble 0 */
- 0x00820200, 0x00020000, 0x80800000, 0x80820200,
- 0x00800000, 0x80020200, 0x80020000, 0x80800000,
- 0x80020200, 0x00820200, 0x00820000, 0x80000200,
- 0x80800200, 0x00800000, 0x00000000, 0x80020000,
- 0x00020000, 0x80000000, 0x00800200, 0x00020200,
- 0x80820200, 0x00820000, 0x80000200, 0x00800200,
- 0x80000000, 0x00000200, 0x00020200, 0x80820000,
- 0x00000200, 0x80800200, 0x80820000, 0x00000000,
- 0x00000000, 0x80820200, 0x00800200, 0x80020000,
- 0x00820200, 0x00020000, 0x80000200, 0x00800200,
- 0x80820000, 0x00000200, 0x00020200, 0x80800000,
- 0x80020200, 0x80000000, 0x80800000, 0x00820000,
- 0x80820200, 0x00020200, 0x00820000, 0x80800200,
- 0x00800000, 0x80000200, 0x80020000, 0x00000000,
- 0x00020000, 0x00800000, 0x80800200, 0x00820200,
- 0x80000000, 0x80820000, 0x00000200, 0x80020200,
-
- /* nibble 1 */
- 0x10042004, 0x00000000, 0x00042000, 0x10040000,
- 0x10000004, 0x00002004, 0x10002000, 0x00042000,
- 0x00002000, 0x10040004, 0x00000004, 0x10002000,
- 0x00040004, 0x10042000, 0x10040000, 0x00000004,
- 0x00040000, 0x10002004, 0x10040004, 0x00002000,
- 0x00042004, 0x10000000, 0x00000000, 0x00040004,
- 0x10002004, 0x00042004, 0x10042000, 0x10000004,
- 0x10000000, 0x00040000, 0x00002004, 0x10042004,
- 0x00040004, 0x10042000, 0x10002000, 0x00042004,
- 0x10042004, 0x00040004, 0x10000004, 0x00000000,
- 0x10000000, 0x00002004, 0x00040000, 0x10040004,
- 0x00002000, 0x10000000, 0x00042004, 0x10002004,
- 0x10042000, 0x00002000, 0x00000000, 0x10000004,
- 0x00000004, 0x10042004, 0x00042000, 0x10040000,
- 0x10040004, 0x00040000, 0x00002004, 0x10002000,
- 0x10002004, 0x00000004, 0x10040000, 0x00042000,
-
- /* nibble 2 */
- 0x41000000, 0x01010040, 0x00000040, 0x41000040,
- 0x40010000, 0x01000000, 0x41000040, 0x00010040,
- 0x01000040, 0x00010000, 0x01010000, 0x40000000,
- 0x41010040, 0x40000040, 0x40000000, 0x41010000,
- 0x00000000, 0x40010000, 0x01010040, 0x00000040,
- 0x40000040, 0x41010040, 0x00010000, 0x41000000,
- 0x41010000, 0x01000040, 0x40010040, 0x01010000,
- 0x00010040, 0x00000000, 0x01000000, 0x40010040,
- 0x01010040, 0x00000040, 0x40000000, 0x00010000,
- 0x40000040, 0x40010000, 0x01010000, 0x41000040,
- 0x00000000, 0x01010040, 0x00010040, 0x41010000,
- 0x40010000, 0x01000000, 0x41010040, 0x40000000,
- 0x40010040, 0x41000000, 0x01000000, 0x41010040,
- 0x00010000, 0x01000040, 0x41000040, 0x00010040,
- 0x01000040, 0x00000000, 0x41010000, 0x40000040,
- 0x41000000, 0x40010040, 0x00000040, 0x01010000,
-
- /* nibble 3 */
- 0x00100402, 0x04000400, 0x00000002, 0x04100402,
- 0x00000000, 0x04100000, 0x04000402, 0x00100002,
- 0x04100400, 0x04000002, 0x04000000, 0x00000402,
- 0x04000002, 0x00100402, 0x00100000, 0x04000000,
- 0x04100002, 0x00100400, 0x00000400, 0x00000002,
- 0x00100400, 0x04000402, 0x04100000, 0x00000400,
- 0x00000402, 0x00000000, 0x00100002, 0x04100400,
- 0x04000400, 0x04100002, 0x04100402, 0x00100000,
- 0x04100002, 0x00000402, 0x00100000, 0x04000002,
- 0x00100400, 0x04000400, 0x00000002, 0x04100000,
- 0x04000402, 0x00000000, 0x00000400, 0x00100002,
- 0x00000000, 0x04100002, 0x04100400, 0x00000400,
- 0x04000000, 0x04100402, 0x00100402, 0x00100000,
- 0x04100402, 0x00000002, 0x04000400, 0x00100402,
- 0x00100002, 0x00100400, 0x04100000, 0x04000402,
- 0x00000402, 0x04000000, 0x04000002, 0x04100400,
-
- /* nibble 4 */
- 0x02000000, 0x00004000, 0x00000100, 0x02004108,
- 0x02004008, 0x02000100, 0x00004108, 0x02004000,
- 0x00004000, 0x00000008, 0x02000008, 0x00004100,
- 0x02000108, 0x02004008, 0x02004100, 0x00000000,
- 0x00004100, 0x02000000, 0x00004008, 0x00000108,
- 0x02000100, 0x00004108, 0x00000000, 0x02000008,
- 0x00000008, 0x02000108, 0x02004108, 0x00004008,
- 0x02004000, 0x00000100, 0x00000108, 0x02004100,
- 0x02004100, 0x02000108, 0x00004008, 0x02004000,
- 0x00004000, 0x00000008, 0x02000008, 0x02000100,
- 0x02000000, 0x00004100, 0x02004108, 0x00000000,
- 0x00004108, 0x02000000, 0x00000100, 0x00004008,
- 0x02000108, 0x00000100, 0x00000000, 0x02004108,
- 0x02004008, 0x02004100, 0x00000108, 0x00004000,
- 0x00004100, 0x02004008, 0x02000100, 0x00000108,
- 0x00000008, 0x00004108, 0x02004000, 0x02000008,
-
- /* nibble 5 */
- 0x20000010, 0x00080010, 0x00000000, 0x20080800,
- 0x00080010, 0x00000800, 0x20000810, 0x00080000,
- 0x00000810, 0x20080810, 0x00080800, 0x20000000,
- 0x20000800, 0x20000010, 0x20080000, 0x00080810,
- 0x00080000, 0x20000810, 0x20080010, 0x00000000,
- 0x00000800, 0x00000010, 0x20080800, 0x20080010,
- 0x20080810, 0x20080000, 0x20000000, 0x00000810,
- 0x00000010, 0x00080800, 0x00080810, 0x20000800,
- 0x00000810, 0x20000000, 0x20000800, 0x00080810,
- 0x20080800, 0x00080010, 0x00000000, 0x20000800,
- 0x20000000, 0x00000800, 0x20080010, 0x00080000,
- 0x00080010, 0x20080810, 0x00080800, 0x00000010,
- 0x20080810, 0x00080800, 0x00080000, 0x20000810,
- 0x20000010, 0x20080000, 0x00080810, 0x00000000,
- 0x00000800, 0x20000010, 0x20000810, 0x20080800,
- 0x20080000, 0x00000810, 0x00000010, 0x20080010,
-
- /* nibble 6 */
- 0x00001000, 0x00000080, 0x00400080, 0x00400001,
- 0x00401081, 0x00001001, 0x00001080, 0x00000000,
- 0x00400000, 0x00400081, 0x00000081, 0x00401000,
- 0x00000001, 0x00401080, 0x00401000, 0x00000081,
- 0x00400081, 0x00001000, 0x00001001, 0x00401081,
- 0x00000000, 0x00400080, 0x00400001, 0x00001080,
- 0x00401001, 0x00001081, 0x00401080, 0x00000001,
- 0x00001081, 0x00401001, 0x00000080, 0x00400000,
- 0x00001081, 0x00401000, 0x00401001, 0x00000081,
- 0x00001000, 0x00000080, 0x00400000, 0x00401001,
- 0x00400081, 0x00001081, 0x00001080, 0x00000000,
- 0x00000080, 0x00400001, 0x00000001, 0x00400080,
- 0x00000000, 0x00400081, 0x00400080, 0x00001080,
- 0x00000081, 0x00001000, 0x00401081, 0x00400000,
- 0x00401080, 0x00000001, 0x00001001, 0x00401081,
- 0x00400001, 0x00401080, 0x00401000, 0x00001001,
-
- /* nibble 7 */
- 0x08200020, 0x08208000, 0x00008020, 0x00000000,
- 0x08008000, 0x00200020, 0x08200000, 0x08208020,
- 0x00000020, 0x08000000, 0x00208000, 0x00008020,
- 0x00208020, 0x08008020, 0x08000020, 0x08200000,
- 0x00008000, 0x00208020, 0x00200020, 0x08008000,
- 0x08208020, 0x08000020, 0x00000000, 0x00208000,
- 0x08000000, 0x00200000, 0x08008020, 0x08200020,
- 0x00200000, 0x00008000, 0x08208000, 0x00000020,
- 0x00200000, 0x00008000, 0x08000020, 0x08208020,
- 0x00008020, 0x08000000, 0x00000000, 0x00208000,
- 0x08200020, 0x08008020, 0x08008000, 0x00200020,
- 0x08208000, 0x00000020, 0x00200020, 0x08008000,
- 0x08208020, 0x00200000, 0x08200000, 0x08000020,
- 0x00208000, 0x00008020, 0x08008020, 0x08200000,
- 0x00000020, 0x08208000, 0x00208020, 0x00000000,
- 0x08000000, 0x08200020, 0x00008000, 0x00208020};
-
- static unsigned long des_skb[8][64]={
- /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
- 0x00000000,0x00000010,0x20000000,0x20000010,
- 0x00010000,0x00010010,0x20010000,0x20010010,
- 0x00000800,0x00000810,0x20000800,0x20000810,
- 0x00010800,0x00010810,0x20010800,0x20010810,
- 0x00000020,0x00000030,0x20000020,0x20000030,
- 0x00010020,0x00010030,0x20010020,0x20010030,
- 0x00000820,0x00000830,0x20000820,0x20000830,
- 0x00010820,0x00010830,0x20010820,0x20010830,
- 0x00080000,0x00080010,0x20080000,0x20080010,
- 0x00090000,0x00090010,0x20090000,0x20090010,
- 0x00080800,0x00080810,0x20080800,0x20080810,
- 0x00090800,0x00090810,0x20090800,0x20090810,
- 0x00080020,0x00080030,0x20080020,0x20080030,
- 0x00090020,0x00090030,0x20090020,0x20090030,
- 0x00080820,0x00080830,0x20080820,0x20080830,
- 0x00090820,0x00090830,0x20090820,0x20090830,
- /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
- 0x00000000,0x02000000,0x00002000,0x02002000,
- 0x00200000,0x02200000,0x00202000,0x02202000,
- 0x00000004,0x02000004,0x00002004,0x02002004,
- 0x00200004,0x02200004,0x00202004,0x02202004,
- 0x00000400,0x02000400,0x00002400,0x02002400,
- 0x00200400,0x02200400,0x00202400,0x02202400,
- 0x00000404,0x02000404,0x00002404,0x02002404,
- 0x00200404,0x02200404,0x00202404,0x02202404,
- 0x10000000,0x12000000,0x10002000,0x12002000,
- 0x10200000,0x12200000,0x10202000,0x12202000,
- 0x10000004,0x12000004,0x10002004,0x12002004,
- 0x10200004,0x12200004,0x10202004,0x12202004,
- 0x10000400,0x12000400,0x10002400,0x12002400,
- 0x10200400,0x12200400,0x10202400,0x12202400,
- 0x10000404,0x12000404,0x10002404,0x12002404,
- 0x10200404,0x12200404,0x10202404,0x12202404,
- /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
- 0x00000000,0x00000001,0x00040000,0x00040001,
- 0x01000000,0x01000001,0x01040000,0x01040001,
- 0x00000002,0x00000003,0x00040002,0x00040003,
- 0x01000002,0x01000003,0x01040002,0x01040003,
- 0x00000200,0x00000201,0x00040200,0x00040201,
- 0x01000200,0x01000201,0x01040200,0x01040201,
- 0x00000202,0x00000203,0x00040202,0x00040203,
- 0x01000202,0x01000203,0x01040202,0x01040203,
- 0x08000000,0x08000001,0x08040000,0x08040001,
- 0x09000000,0x09000001,0x09040000,0x09040001,
- 0x08000002,0x08000003,0x08040002,0x08040003,
- 0x09000002,0x09000003,0x09040002,0x09040003,
- 0x08000200,0x08000201,0x08040200,0x08040201,
- 0x09000200,0x09000201,0x09040200,0x09040201,
- 0x08000202,0x08000203,0x08040202,0x08040203,
- 0x09000202,0x09000203,0x09040202,0x09040203,
- /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
- 0x00000000,0x00100000,0x00000100,0x00100100,
- 0x00000008,0x00100008,0x00000108,0x00100108,
- 0x00001000,0x00101000,0x00001100,0x00101100,
- 0x00001008,0x00101008,0x00001108,0x00101108,
- 0x04000000,0x04100000,0x04000100,0x04100100,
- 0x04000008,0x04100008,0x04000108,0x04100108,
- 0x04001000,0x04101000,0x04001100,0x04101100,
- 0x04001008,0x04101008,0x04001108,0x04101108,
- 0x00020000,0x00120000,0x00020100,0x00120100,
- 0x00020008,0x00120008,0x00020108,0x00120108,
- 0x00021000,0x00121000,0x00021100,0x00121100,
- 0x00021008,0x00121008,0x00021108,0x00121108,
- 0x04020000,0x04120000,0x04020100,0x04120100,
- 0x04020008,0x04120008,0x04020108,0x04120108,
- 0x04021000,0x04121000,0x04021100,0x04121100,
- 0x04021008,0x04121008,0x04021108,0x04121108,
- /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
- 0x00000000,0x10000000,0x00010000,0x10010000,
- 0x00000004,0x10000004,0x00010004,0x10010004,
- 0x20000000,0x30000000,0x20010000,0x30010000,
- 0x20000004,0x30000004,0x20010004,0x30010004,
- 0x00100000,0x10100000,0x00110000,0x10110000,
- 0x00100004,0x10100004,0x00110004,0x10110004,
- 0x20100000,0x30100000,0x20110000,0x30110000,
- 0x20100004,0x30100004,0x20110004,0x30110004,
- 0x00001000,0x10001000,0x00011000,0x10011000,
- 0x00001004,0x10001004,0x00011004,0x10011004,
- 0x20001000,0x30001000,0x20011000,0x30011000,
- 0x20001004,0x30001004,0x20011004,0x30011004,
- 0x00101000,0x10101000,0x00111000,0x10111000,
- 0x00101004,0x10101004,0x00111004,0x10111004,
- 0x20101000,0x30101000,0x20111000,0x30111000,
- 0x20101004,0x30101004,0x20111004,0x30111004,
- /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
- 0x00000000,0x08000000,0x00000008,0x08000008,
- 0x00000400,0x08000400,0x00000408,0x08000408,
- 0x00020000,0x08020000,0x00020008,0x08020008,
- 0x00020400,0x08020400,0x00020408,0x08020408,
- 0x00000001,0x08000001,0x00000009,0x08000009,
- 0x00000401,0x08000401,0x00000409,0x08000409,
- 0x00020001,0x08020001,0x00020009,0x08020009,
- 0x00020401,0x08020401,0x00020409,0x08020409,
- 0x02000000,0x0A000000,0x02000008,0x0A000008,
- 0x02000400,0x0A000400,0x02000408,0x0A000408,
- 0x02020000,0x0A020000,0x02020008,0x0A020008,
- 0x02020400,0x0A020400,0x02020408,0x0A020408,
- 0x02000001,0x0A000001,0x02000009,0x0A000009,
- 0x02000401,0x0A000401,0x02000409,0x0A000409,
- 0x02020001,0x0A020001,0x02020009,0x0A020009,
- 0x02020401,0x0A020401,0x02020409,0x0A020409,
- /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
- 0x00000000,0x00000100,0x00080000,0x00080100,
- 0x01000000,0x01000100,0x01080000,0x01080100,
- 0x00000010,0x00000110,0x00080010,0x00080110,
- 0x01000010,0x01000110,0x01080010,0x01080110,
- 0x00200000,0x00200100,0x00280000,0x00280100,
- 0x01200000,0x01200100,0x01280000,0x01280100,
- 0x00200010,0x00200110,0x00280010,0x00280110,
- 0x01200010,0x01200110,0x01280010,0x01280110,
- 0x00000200,0x00000300,0x00080200,0x00080300,
- 0x01000200,0x01000300,0x01080200,0x01080300,
- 0x00000210,0x00000310,0x00080210,0x00080310,
- 0x01000210,0x01000310,0x01080210,0x01080310,
- 0x00200200,0x00200300,0x00280200,0x00280300,
- 0x01200200,0x01200300,0x01280200,0x01280300,
- 0x00200210,0x00200310,0x00280210,0x00280310,
- 0x01200210,0x01200310,0x01280210,0x01280310,
- /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
- 0x00000000,0x04000000,0x00040000,0x04040000,
- 0x00000002,0x04000002,0x00040002,0x04040002,
- 0x00002000,0x04002000,0x00042000,0x04042000,
- 0x00002002,0x04002002,0x00042002,0x04042002,
- 0x00000020,0x04000020,0x00040020,0x04040020,
- 0x00000022,0x04000022,0x00040022,0x04040022,
- 0x00002020,0x04002020,0x00042020,0x04042020,
- 0x00002022,0x04002022,0x00042022,0x04042022,
- 0x00000800,0x04000800,0x00040800,0x04040800,
- 0x00000802,0x04000802,0x00040802,0x04040802,
- 0x00002800,0x04002800,0x00042800,0x04042800,
- 0x00002802,0x04002802,0x00042802,0x04042802,
- 0x00000820,0x04000820,0x00040820,0x04040820,
- 0x00000822,0x04000822,0x00040822,0x04040822,
- 0x00002820,0x04002820,0x00042820,0x04042820,
- 0x00002822,0x04002822,0x00042822,0x04042822,
- };
-
- #define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
- l|=((unsigned long)(*((c)++)))<< 8, \
- l|=((unsigned long)(*((c)++)))<<16, \
- l|=((unsigned long)(*((c)++)))<<24)
-
- #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
- *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
- *((c)++)=(unsigned char)(((l)>>16)&0xff), \
- *((c)++)=(unsigned char)(((l)>>24)&0xff))
-
- /*
- * IP and FP
- * The problem is more of a geometric problem that random bit fiddling.
- * 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6
- * 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4
- * 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2
- * 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0
- *
- * 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7
- * 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5
- * 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3
- * 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1
- *
- * The output has been subject to swaps of the form
- * 0 1 -> 3 1 but the odd and even bits have been put into
- * 2 3 2 0
- * different words. The main trick is to remember that
- * t=((l>>size)^r)&(mask);
- * r^=t;
- * l^=(t<<size);
- * can be used to swap and move bits between words.
- *
- * So l = 0 1 2 3 r = 16 17 18 19
- * 4 5 6 7 20 21 22 23
- * 8 9 10 11 24 25 26 27
- * 12 13 14 15 28 29 30 31
- * becomes (for size == 2 and mask == 0x3333)
- * t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19
- * 6^20 7^21 -- -- 4 5 20 21 6 7 22 23
- * 10^24 11^25 -- -- 8 9 24 25 10 11 24 25
- * 14^28 15^29 -- -- 12 13 28 29 14 15 28 29
- *
- * Thanks for hints from Richard Outerbridge - he told me IP&FP
- * could be done in 15 xor, 10 shifts and 5 ands.
- * When I finally started to think of the problem in 2D
- * I first got ~42 operations without xors. When I remembered
- * how to use xors :-) I got it to its final state.
- */
-
- #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
- (b)^=(t),\
- (a)^=((t)<<(n)))
-
- #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
- (a)=(a)^(t)^(t>>(16-(n))))
-
-
- /* The changes to this macro may help or hinder, depending on the
- * compiler and the achitecture. gcc2 always seems to do well :-).
- * Inspired by Dana How <how@isl.stanford.edu>
- * DO NOT use the alternative version on machines with 8 byte longs.
- */
- #ifdef ALT_ECB
- #define D_ENCRYPT(L,R,S) \
- u=((R^s[S ])<<2); \
- t= R^s[S+1]; \
- t=((t>>2)+(t<<30)); \
- L^= \
- *(unsigned long *)(des_SP+0x0100+((t )&0xfc))+ \
- *(unsigned long *)(des_SP+0x0300+((t>> 8)&0xfc))+ \
- *(unsigned long *)(des_SP+0x0500+((t>>16)&0xfc))+ \
- *(unsigned long *)(des_SP+0x0700+((t>>24)&0xfc))+ \
- *(unsigned long *)(des_SP+ ((u )&0xfc))+ \
- *(unsigned long *)(des_SP+0x0200+((u>> 8)&0xfc))+ \
- *(unsigned long *)(des_SP+0x0400+((u>>16)&0xfc))+ \
- *(unsigned long *)(des_SP+0x0600+((u>>24)&0xfc));
- #else /* original version */
- #define D_ENCRYPT(L,R,S) \
- u=(R^s[S ]); \
- t=R^s[S+1]; \
- t=((t>>4)+(t<<28)); \
- L^= des_SPtrans[1][(t )&0x3f]| \
- des_SPtrans[3][(t>> 8)&0x3f]| \
- des_SPtrans[5][(t>>16)&0x3f]| \
- des_SPtrans[7][(t>>24)&0x3f]| \
- des_SPtrans[0][(u )&0x3f]| \
- des_SPtrans[2][(u>> 8)&0x3f]| \
- des_SPtrans[4][(u>>16)&0x3f]| \
- des_SPtrans[6][(u>>24)&0x3f];
- #endif
-
- #define ITERATIONS 16
-
- static char shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0};
-
- static void des_set_key(key,schedule)
- char *key;
- unsigned long *schedule;
- {
- register unsigned long c,d,t,s;
- register unsigned char *in;
- register unsigned long *k;
- register int i;
-
- k=(unsigned long *)schedule;
- in=(unsigned char *)key;
-
- c2l(in,c);
- c2l(in,d);
-
- /* I now do it in 47 simple operations :-)
- * Thanks to John Fletcher (john_fletcher@lccmail.ocf.llnl.gov)
- * for the inspiration. :-) */
- PERM_OP (d,c,t,4,0x0f0f0f0f);
- HPERM_OP(c,t,-2,0xcccc0000);
- HPERM_OP(d,t,-2,0xcccc0000);
- PERM_OP (d,c,t,1,0x55555555);
- PERM_OP (c,d,t,8,0x00ff00ff);
- PERM_OP (d,c,t,1,0x55555555);
- d= (((d&0x000000ff)<<16)| (d&0x0000ff00) |
- ((d&0x00ff0000)>>16)|((c&0xf0000000)>>4));
- c&=0x0fffffff;
-
- for (i=0; i<ITERATIONS; i++) {
- if (shifts2[i])
- { c=((c>>2)|(c<<26)); d=((d>>2)|(d<<26)); }
- else
- { c=((c>>1)|(c<<27)); d=((d>>1)|(d<<27)); }
- c&=0x0fffffff;
- d&=0x0fffffff;
- /* could be a few less shifts but I am to lazy at this
- * point in time to investigate */
- s = des_skb[0][(c)&0x3f]|
- des_skb[1][((c>> 6)&0x03)|((c>> 7)&0x3c)]|
- des_skb[2][((c>>13)&0x0f)|((c>>14)&0x30)]|
- des_skb[3][((c>>20)&0x01)|((c>>21)&0x06)|((c>>22)&0x38)];
- t = des_skb[4][(d)&0x3f]|
- des_skb[5][((d>> 7)&0x03)|((d>> 8)&0x3c)]|
- des_skb[6][(d>>15)&0x3f]|
- des_skb[7][((d>>21)&0x0f)|((d>>22)&0x30)];
-
- /* table contained 0213 4657 */
- *(k++)=((t<<16)|(s&0x0000ffff))&0xffffffff;
- s= ((s>>16)|(t&0xffff0000));
-
- s=(s<<4)|(s>>28);
- *(k++)=s&0xffffffff;
- }
- }
-
-
- static void des_encrypt(buf,schedule,encrypt)
- unsigned long *buf;
- char *schedule;
- int encrypt;
- {
- register unsigned long l,r,t,u;
- #ifdef ALT_ECB
- register unsigned char *des_SP=(unsigned char *)des_SPtrans;
- #endif
- register int i;
- register unsigned long *s;
-
- l=buf[0];
- r=buf[1];
-
- /* do IP */
- PERM_OP(r,l,t, 4,0x0f0f0f0f);
- PERM_OP(l,r,t,16,0x0000ffff);
- PERM_OP(r,l,t, 2,0x33333333);
- PERM_OP(l,r,t, 8,0x00ff00ff);
- PERM_OP(r,l,t, 1,0x55555555);
- /* r and l are reversed - remember that :-) - fix
- * it in the next step */
-
- /* Things have been modified so that the initial rotate is
- * done outside the loop. This required the
- * des_SPtrans values in sp.h to be rotated 1 bit to the right.
- * One perl script later and things have a 5% speed up on a sparc2.
- * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
- * for pointing this out. */
- t=(r<<1)|(r>>31);
- r=(l<<1)|(l>>31);
- l=t;
-
- /* clear the top bits on machines with 8byte longs */
- l&=0xffffffff;
- r&=0xffffffff;
-
- s=(unsigned long *)schedule;
- /* I don't know if it is worth the effort of loop unrolling the
- * inner loop */
- if (encrypt) {
- for (i=0; i<32; i+=4) {
- D_ENCRYPT(l,r,i+0); /* 1 */
- D_ENCRYPT(r,l,i+2); /* 2 */
- }
- } else {
- for (i=30; i>0; i-=4) {
- D_ENCRYPT(l,r,i-0); /* 16 */
- D_ENCRYPT(r,l,i-2); /* 15 */
- }
- }
- l=(l>>1)|(l<<31);
- r=(r>>1)|(r<<31);
- /* clear the top bits on machines with 8byte longs */
- l&=0xffffffff;
- r&=0xffffffff;
-
- /* swap l and r
- * we will not do the swap so just remember they are
- * reversed for the rest of the subroutine
- * luckily FP fixes this problem :-) */
-
- PERM_OP(r,l,t, 1,0x55555555);
- PERM_OP(l,r,t, 8,0x00ff00ff);
- PERM_OP(r,l,t, 2,0x33333333);
- PERM_OP(l,r,t,16,0x0000ffff);
- PERM_OP(r,l,t, 4,0x0f0f0f0f);
-
- buf[0]=l;
- buf[1]=r;
-
- l = r = t = u = 0;
- }
-
-
- int _des_crypt(buf,len,desp)
- char *buf;
- unsigned len;
- struct desparams *desp;
- {
- unsigned long schedule[32];
- register unsigned long tin0,tin1;
- register unsigned long tout0,tout1,xor0,xor1;
- register unsigned char *in, *out;
- unsigned long tbuf[2];
- unsigned char *iv, *oiv;
- int cbc_mode;
-
- cbc_mode = (desp->des_mode == CBC) ? 1 : 0;
-
- in=(unsigned char *)buf;
- out=(unsigned char *)buf;
- oiv=iv=(unsigned char *)desp->des_ivec;
-
- des_set_key(desp->des_key,schedule);
-
- if (desp->des_dir == ENCRYPT) {
- c2l(iv,tout0);
- c2l(iv,tout1);
- for (; len>0; len-=8) {
- c2l(in,tin0);
- c2l(in,tin1);
- if (cbc_mode) {
- tin0^=tout0;
- tin1^=tout1;
- }
- tbuf[0]=tin0;
- tbuf[1]=tin1;
- des_encrypt(tbuf,schedule,1);
- tout0=tbuf[0];
- tout1=tbuf[1];
- l2c(tout0,out);
- l2c(tout1,out);
- }
- l2c(tout0,oiv);
- l2c(tout1,oiv);
- } else {
- c2l(iv,xor0);
- c2l(iv,xor1);
- for (; len>0; len-=8) {
- c2l(in,tin0);
- c2l(in,tin1);
- tbuf[0]=tin0;
- tbuf[1]=tin1;
- des_encrypt(tbuf,schedule,0);
- if (cbc_mode) {
- tout0=tbuf[0]^xor0;
- tout1=tbuf[1]^xor1;
- xor0=tin0;
- xor1=tin1;
- } else {
- tout0=tbuf[0];
- tout1=tbuf[1];
- }
- l2c(tout0,out);
- l2c(tout1,out);
- }
- l2c(tin0,oiv);
- l2c(tin1,oiv);
- }
- tin0=tin1=tout0=tout1=xor0=xor1=0;
- tbuf[0]=tbuf[1]=0;
- bzero(schedule, sizeof(schedule));
-
- return(1);
- }
-
-