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Diffstat (limited to 'crypto/des/des.pl')
| -rw-r--r-- | crypto/des/des.pl | 552 |
1 files changed, 552 insertions, 0 deletions
diff --git a/crypto/des/des.pl b/crypto/des/des.pl new file mode 100644 index 0000000000..8a3f7e3ed6 --- /dev/null +++ b/crypto/des/des.pl @@ -0,0 +1,552 @@ +#!/usr/local/bin/perl +# des.pl - eric young 22/11/1991 eay@cryptsoft.com +# +# Copyright (C) 1993 Eric Young +# +# 11 April 1996 - patched to circumvent Perl 5 (through 5.002) problem +# with sign-extension on right shift operations. +# Ed Kubaitis - ejk@uiuc.edu +# +# eay - 92/08/31 - I think I have fixed all problems for 64bit +# versions of perl but I could be wrong since I have not tested it yet :-). +# +# This is an implementation of DES in perl. +# The two routines (des_set_key and des_ecb_encrypt) +# take 8 byte objects as arguments. +# +# des_set_key takes an 8 byte string as a key and returns a key schedule +# for use in calls to des_ecb_encrypt. +# des_ecb_encrypt takes three arguments, the first is a key schedule +# (make sure to pass it by reference with the *), the second is 1 +# to encrypt, 0 to decrypt. The third argument is an 8 byte object +# to encrypt. The function returns an 8 byte object that has been +# DES encrypted. +# +# example: +# require 'des.pl' +# +# $key =pack("C8",0x12,0x23,0x45,0x67,0x89,0xab,0xcd,0xef); +# @ks= &des_set_key($key); +# +# $outbytes= &des_ecb_encrypt(*ks,1,$data); +# @enc =unpack("C8",$outbytes); +# + +package des; + +eval("use integer;") if (int($]) > 4); + +# The following 8 arrays are used in des_set_key +@skb0=( +# 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, +); +@skb1=( +# 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, +); +@skb2=( +# 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, +); +@skb3=( +# 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, +); +@skb4=( +# 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, +); +@skb5=( +# 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, +); +@skb6=( +# 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, +); +@skb7=( +# 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, +); + +@shifts2=(0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0); + +# used in ecb_encrypt +@SP0=( +0x00410100, 0x00010000, 0x40400000, 0x40410100, +0x00400000, 0x40010100, 0x40010000, 0x40400000, +0x40010100, 0x00410100, 0x00410000, 0x40000100, +0x40400100, 0x00400000, 0x00000000, 0x40010000, +0x00010000, 0x40000000, 0x00400100, 0x00010100, +0x40410100, 0x00410000, 0x40000100, 0x00400100, +0x40000000, 0x00000100, 0x00010100, 0x40410000, +0x00000100, 0x40400100, 0x40410000, 0x00000000, +0x00000000, 0x40410100, 0x00400100, 0x40010000, +0x00410100, 0x00010000, 0x40000100, 0x00400100, +0x40410000, 0x00000100, 0x00010100, 0x40400000, +0x40010100, 0x40000000, 0x40400000, 0x00410000, +0x40410100, 0x00010100, 0x00410000, 0x40400100, +0x00400000, 0x40000100, 0x40010000, 0x00000000, +0x00010000, 0x00400000, 0x40400100, 0x00410100, +0x40000000, 0x40410000, 0x00000100, 0x40010100, +); +@SP1=( +0x08021002, 0x00000000, 0x00021000, 0x08020000, +0x08000002, 0x00001002, 0x08001000, 0x00021000, +0x00001000, 0x08020002, 0x00000002, 0x08001000, +0x00020002, 0x08021000, 0x08020000, 0x00000002, +0x00020000, 0x08001002, 0x08020002, 0x00001000, +0x00021002, 0x08000000, 0x00000000, 0x00020002, +0x08001002, 0x00021002, 0x08021000, 0x08000002, +0x08000000, 0x00020000, 0x00001002, 0x08021002, +0x00020002, 0x08021000, 0x08001000, 0x00021002, +0x08021002, 0x00020002, 0x08000002, 0x00000000, +0x08000000, 0x00001002, 0x00020000, 0x08020002, +0x00001000, 0x08000000, 0x00021002, 0x08001002, +0x08021000, 0x00001000, 0x00000000, 0x08000002, +0x00000002, 0x08021002, 0x00021000, 0x08020000, +0x08020002, 0x00020000, 0x00001002, 0x08001000, +0x08001002, 0x00000002, 0x08020000, 0x00021000, +); +@SP2=( +0x20800000, 0x00808020, 0x00000020, 0x20800020, +0x20008000, 0x00800000, 0x20800020, 0x00008020, +0x00800020, 0x00008000, 0x00808000, 0x20000000, +0x20808020, 0x20000020, 0x20000000, 0x20808000, +0x00000000, 0x20008000, 0x00808020, 0x00000020, +0x20000020, 0x20808020, 0x00008000, 0x20800000, +0x20808000, 0x00800020, 0x20008020, 0x00808000, +0x00008020, 0x00000000, 0x00800000, 0x20008020, +0x00808020, 0x00000020, 0x20000000, 0x00008000, +0x20000020, 0x20008000, 0x00808000, 0x20800020, +0x00000000, 0x00808020, 0x00008020, 0x20808000, +0x20008000, 0x00800000, 0x20808020, 0x20000000, +0x20008020, 0x20800000, 0x00800000, 0x20808020, +0x00008000, 0x00800020, 0x20800020, 0x00008020, +0x00800020, 0x00000000, 0x20808000, 0x20000020, +0x20800000, 0x20008020, 0x00000020, 0x00808000, +); +@SP3=( +0x00080201, 0x02000200, 0x00000001, 0x02080201, +0x00000000, 0x02080000, 0x02000201, 0x00080001, +0x02080200, 0x02000001, 0x02000000, 0x00000201, +0x02000001, 0x00080201, 0x00080000, 0x02000000, +0x02080001, 0x00080200, 0x00000200, 0x00000001, +0x00080200, 0x02000201, 0x02080000, 0x00000200, +0x00000201, 0x00000000, 0x00080001, 0x02080200, +0x02000200, 0x02080001, 0x02080201, 0x00080000, +0x02080001, 0x00000201, 0x00080000, 0x02000001, +0x00080200, 0x02000200, 0x00000001, 0x02080000, +0x02000201, 0x00000000, 0x00000200, 0x00080001, +0x00000000, 0x02080001, 0x02080200, 0x00000200, +0x02000000, 0x02080201, 0x00080201, 0x00080000, +0x02080201, 0x00000001, 0x02000200, 0x00080201, +0x00080001, 0x00080200, 0x02080000, 0x02000201, +0x00000201, 0x02000000, 0x02000001, 0x02080200, +); +@SP4=( +0x01000000, 0x00002000, 0x00000080, 0x01002084, +0x01002004, 0x01000080, 0x00002084, 0x01002000, +0x00002000, 0x00000004, 0x01000004, 0x00002080, +0x01000084, 0x01002004, 0x01002080, 0x00000000, +0x00002080, 0x01000000, 0x00002004, 0x00000084, +0x01000080, 0x00002084, 0x00000000, 0x01000004, +0x00000004, 0x01000084, 0x01002084, 0x00002004, +0x01002000, 0x00000080, 0x00000084, 0x01002080, +0x01002080, 0x01000084, 0x00002004, 0x01002000, +0x00002000, 0x00000004, 0x01000004, 0x01000080, +0x01000000, 0x00002080, 0x01002084, 0x00000000, +0x00002084, 0x01000000, 0x00000080, 0x00002004, +0x01000084, 0x00000080, 0x00000000, 0x01002084, +0x01002004, 0x01002080, 0x00000084, 0x00002000, +0x00002080, 0x01002004, 0x01000080, 0x00000084, +0x00000004, 0x00002084, 0x01002000, 0x01000004, +); +@SP5=( +0x10000008, 0x00040008, 0x00000000, 0x10040400, +0x00040008, 0x00000400, 0x10000408, 0x00040000, +0x00000408, 0x10040408, 0x00040400, 0x10000000, +0x10000400, 0x10000008, 0x10040000, 0x00040408, +0x00040000, 0x10000408, 0x10040008, 0x00000000, +0x00000400, 0x00000008, 0x10040400, 0x10040008, +0x10040408, 0x10040000, 0x10000000, 0x00000408, +0x00000008, 0x00040400, 0x00040408, 0x10000400, +0x00000408, 0x10000000, 0x10000400, 0x00040408, +0x10040400, 0x00040008, 0x00000000, 0x10000400, +0x10000000, 0x00000400, 0x10040008, 0x00040000, +0x00040008, 0x10040408, 0x00040400, 0x00000008, +0x10040408, 0x00040400, 0x00040000, 0x10000408, +0x10000008, 0x10040000, 0x00040408, 0x00000000, +0x00000400, 0x10000008, 0x10000408, 0x10040400, +0x10040000, 0x00000408, 0x00000008, 0x10040008, +); +@SP6=( +0x00000800, 0x00000040, 0x00200040, 0x80200000, +0x80200840, 0x80000800, 0x00000840, 0x00000000, +0x00200000, 0x80200040, 0x80000040, 0x00200800, +0x80000000, 0x00200840, 0x00200800, 0x80000040, +0x80200040, 0x00000800, 0x80000800, 0x80200840, +0x00000000, 0x00200040, 0x80200000, 0x00000840, +0x80200800, 0x80000840, 0x00200840, 0x80000000, +0x80000840, 0x80200800, 0x00000040, 0x00200000, +0x80000840, 0x00200800, 0x80200800, 0x80000040, +0x00000800, 0x00000040, 0x00200000, 0x80200800, +0x80200040, 0x80000840, 0x00000840, 0x00000000, +0x00000040, 0x80200000, 0x80000000, 0x00200040, +0x00000000, 0x80200040, 0x00200040, 0x00000840, +0x80000040, 0x00000800, 0x80200840, 0x00200000, +0x00200840, 0x80000000, 0x80000800, 0x80200840, +0x80200000, 0x00200840, 0x00200800, 0x80000800, +); +@SP7=( +0x04100010, 0x04104000, 0x00004010, 0x00000000, +0x04004000, 0x00100010, 0x04100000, 0x04104010, +0x00000010, 0x04000000, 0x00104000, 0x00004010, +0x00104010, 0x04004010, 0x04000010, 0x04100000, +0x00004000, 0x00104010, 0x00100010, 0x04004000, +0x04104010, 0x04000010, 0x00000000, 0x00104000, +0x04000000, 0x00100000, 0x04004010, 0x04100010, +0x00100000, 0x00004000, 0x04104000, 0x00000010, +0x00100000, 0x00004000, 0x04000010, 0x04104010, +0x00004010, 0x04000000, 0x00000000, 0x00104000, +0x04100010, 0x04004010, 0x04004000, 0x00100010, +0x04104000, 0x00000010, 0x00100010, 0x04004000, +0x04104010, 0x00100000, 0x04100000, 0x04000010, +0x00104000, 0x00004010, 0x04004010, 0x04100000, +0x00000010, 0x04104000, 0x00104010, 0x00000000, +0x04000000, 0x04100010, 0x00004000, 0x00104010, +); + +sub main'des_set_key + { + local($param)=@_; + local(@key); + local($c,$d,$i,$s,$t); + local(@ks)=(); + + # Get the bytes in the order we want. + @key=unpack("C8",$param); + + $c= ($key[0] )| + ($key[1]<< 8)| + ($key[2]<<16)| + ($key[3]<<24); + $d= ($key[4] )| + ($key[5]<< 8)| + ($key[6]<<16)| + ($key[7]<<24); + + &doPC1(*c,*d); + + for $i (@shifts2) + { + if ($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; + $s= $skb0[ ($c )&0x3f ]| + $skb1[(($c>> 6)&0x03)|(($c>> 7)&0x3c)]| + $skb2[(($c>>13)&0x0f)|(($c>>14)&0x30)]| + $skb3[(($c>>20)&0x01)|(($c>>21)&0x06) | + (($c>>22)&0x38)]; + $t= $skb4[ ($d )&0x3f ]| + $skb5[(($d>> 7)&0x03)|(($d>> 8)&0x3c)]| + $skb6[ ($d>>15)&0x3f ]| + $skb7[(($d>>21)&0x0f)|(($d>>22)&0x30)]; + push(@ks,(($t<<16)|($s&0x0000ffff))&0xffffffff); + $s= (($s>>16)&0x0000ffff)|($t&0xffff0000) ; + push(@ks,(($s<<4)|(($s>>28)&0xf))&0xffffffff); + } + @ks; + } + +sub doPC1 + { + local(*a,*b)=@_; + local($t); + + $t=(($b>>4)^$a)&0x0f0f0f0f; + $b^=($t<<4); $a^=$t; + # do $a first + $t=(($a<<18)^$a)&0xcccc0000; + $a=$a^$t^(($t>>18)&0x00003fff); + $t=(($a<<17)^$a)&0xaaaa0000; + $a=$a^$t^(($t>>17)&0x00007fff); + $t=(($a<< 8)^$a)&0x00ff0000; + $a=$a^$t^(($t>> 8)&0x00ffffff); + $t=(($a<<17)^$a)&0xaaaa0000; + $a=$a^$t^(($t>>17)&0x00007fff); + + # now do $b + $t=(($b<<24)^$b)&0xff000000; + $b=$b^$t^(($t>>24)&0x000000ff); + $t=(($b<< 8)^$b)&0x00ff0000; + $b=$b^$t^(($t>> 8)&0x00ffffff); + $t=(($b<<14)^$b)&0x33330000; + $b=$b^$t^(($t>>14)&0x0003ffff); + $b=(($b&0x00aa00aa)<<7)|(($b&0x55005500)>>7)|($b&0xaa55aa55); + $b=(($b>>8)&0x00ffffff)|((($a&0xf0000000)>>4)&0x0fffffff); + $a&=0x0fffffff; + } + +sub doIP + { + local(*a,*b)=@_; + local($t); + + $t=(($b>> 4)^$a)&0x0f0f0f0f; + $b^=($t<< 4); $a^=$t; + $t=(($a>>16)^$b)&0x0000ffff; + $a^=($t<<16); $b^=$t; + $t=(($b>> 2)^$a)&0x33333333; + $b^=($t<< 2); $a^=$t; + $t=(($a>> 8)^$b)&0x00ff00ff; + $a^=($t<< 8); $b^=$t; + $t=(($b>> 1)^$a)&0x55555555; + $b^=($t<< 1); $a^=$t; + $t=$a; + $a=$b&0xffffffff; + $b=$t&0xffffffff; + } + +sub doFP + { + local(*a,*b)=@_; + local($t); + + $t=(($b>> 1)^$a)&0x55555555; + $b^=($t<< 1); $a^=$t; + $t=(($a>> 8)^$b)&0x00ff00ff; + $a^=($t<< 8); $b^=$t; + $t=(($b>> 2)^$a)&0x33333333; + $b^=($t<< 2); $a^=$t; + $t=(($a>>16)^$b)&0x0000ffff; + $a^=($t<<16); $b^=$t; + $t=(($b>> 4)^$a)&0x0f0f0f0f; + $b^=($t<< 4); $a^=$t; + $a&=0xffffffff; + $b&=0xffffffff; + } + +sub main'des_ecb_encrypt + { + local(*ks,$encrypt,$in)=@_; + local($l,$r,$i,$t,$u,@input); + + @input=unpack("C8",$in); + # Get the bytes in the order we want. + $l= ($input[0] )| + ($input[1]<< 8)| + ($input[2]<<16)| + ($input[3]<<24); + $r= ($input[4] )| + ($input[5]<< 8)| + ($input[6]<<16)| + ($input[7]<<24); + + $l&=0xffffffff; + $r&=0xffffffff; + &doIP(*l,*r); + if ($encrypt) + { + for ($i=0; $i<32; $i+=4) + { + $t=((($r&0x7fffffff)<<1)|(($r>>31)&0x00000001)); + $u=$t^$ks[$i ]; + $t=$t^$ks[$i+1]; + $t2=(($t&0x0000000f)<<28); + + $t=((($t>>4)&0x0fffffff)|(($t&0x0000000f)<<28)); + $l^= $SP1[ $t &0x3f]| + $SP3[($t>> 8)&0x3f]| + $SP5[($t>>16)&0x3f]| + $SP7[($t>>24)&0x3f]| + $SP0[ $u &0x3f]| + $SP2[($u>> 8)&0x3f]| + $SP4[($u>>16)&0x3f]| + $SP6[($u>>24)&0x3f]; + + $t=(($l<<1)|(($l>>31)&0x1))&0xffffffff; + $u=$t^$ks[$i+2]; + $t=$t^$ks[$i+3]; + $t=((($t>>4)&0x0fffffff)|($t<<28))&0xffffffff; + $r^= $SP1[ $t &0x3f]| + $SP3[($t>> 8)&0x3f]| + $SP5[($t>>16)&0x3f]| + $SP7[($t>>24)&0x3f]| + $SP0[ $u &0x3f]| + $SP2[($u>> 8)&0x3f]| + $SP4[($u>>16)&0x3f]| + $SP6[($u>>24)&0x3f]; + } + } + else + { + for ($i=30; $i>0; $i-=4) + { + $t=(($r<<1)|(($r>>31)&0x1))&0xffffffff; + $u=$t^$ks[$i ]; + $t=$t^$ks[$i+1]; + $t=((($t>>4)&0x0fffffff)|($t<<28))&0xffffffff; + $l^= $SP1[ $t &0x3f]| + $SP3[($t>> 8)&0x3f]| + $SP5[($t>>16)&0x3f]| + $SP7[($t>>24)&0x3f]| + $SP0[ $u &0x3f]| + $SP2[($u>> 8)&0x3f]| + $SP4[($u>>16)&0x3f]| + $SP6[($u>>24)&0x3f]; + + $t=(($l<<1)|(($l>>31)&0x1))&0xffffffff; + $u=$t^$ks[$i-2]; + $t=$t^$ks[$i-1]; + $t=((($t>>4)&0x0fffffff)|($t<<28))&0xffffffff; + $r^= $SP1[ $t &0x3f]| + $SP3[($t>> 8)&0x3f]| + $SP5[($t>>16)&0x3f]| + $SP7[($t>>24)&0x3f]| + $SP0[ $u &0x3f]| + $SP2[($u>> 8)&0x3f]| + $SP4[($u>>16)&0x3f]| + $SP6[($u>>24)&0x3f]; + } + } + &doFP(*l,*r); + pack("C8",$l&0xff, + ($l>> 8)&0x00ffffff, + ($l>>16)&0x0000ffff, + ($l>>24)&0x000000ff, + $r&0xff, + ($r>> 8)&0x00ffffff, + ($r>>16)&0x0000ffff, + ($r>>24)&0x000000ff); + } |