| /* |
| * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <openssl/des.h> |
| |
| #include <stdlib.h> |
| |
| #include "internal.h" |
| |
| |
| /* 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) \ |
| do { \ |
| (t) = ((((a) >> (n)) ^ (b)) & (m)); \ |
| (b) ^= (t); \ |
| (a) ^= ((t) << (n)); \ |
| } while (0) |
| |
| #define IP(l, r) \ |
| do { \ |
| uint32_t tt; \ |
| PERM_OP(r, l, tt, 4, 0x0f0f0f0fL); \ |
| PERM_OP(l, r, tt, 16, 0x0000ffffL); \ |
| PERM_OP(r, l, tt, 2, 0x33333333L); \ |
| PERM_OP(l, r, tt, 8, 0x00ff00ffL); \ |
| PERM_OP(r, l, tt, 1, 0x55555555L); \ |
| } while (0) |
| |
| #define FP(l, r) \ |
| do { \ |
| uint32_t tt; \ |
| PERM_OP(l, r, tt, 1, 0x55555555L); \ |
| PERM_OP(r, l, tt, 8, 0x00ff00ffL); \ |
| PERM_OP(l, r, tt, 2, 0x33333333L); \ |
| PERM_OP(r, l, tt, 16, 0x0000ffffL); \ |
| PERM_OP(l, r, tt, 4, 0x0f0f0f0fL); \ |
| } while (0) |
| |
| #define LOAD_DATA(ks, R, S, u, t, E0, E1) \ |
| do { \ |
| (u) = (R) ^ (ks)->subkeys[S][0]; \ |
| (t) = (R) ^ (ks)->subkeys[S][1]; \ |
| } while (0) |
| |
| #define D_ENCRYPT(ks, LL, R, S) \ |
| do { \ |
| LOAD_DATA(ks, R, S, u, t, E0, E1); \ |
| t = CRYPTO_rotr_u32(t, 4); \ |
| (LL) ^= \ |
| DES_SPtrans[0][(u >> 2L) & 0x3f] ^ DES_SPtrans[2][(u >> 10L) & 0x3f] ^ \ |
| DES_SPtrans[4][(u >> 18L) & 0x3f] ^ \ |
| DES_SPtrans[6][(u >> 26L) & 0x3f] ^ DES_SPtrans[1][(t >> 2L) & 0x3f] ^ \ |
| DES_SPtrans[3][(t >> 10L) & 0x3f] ^ \ |
| DES_SPtrans[5][(t >> 18L) & 0x3f] ^ DES_SPtrans[7][(t >> 26L) & 0x3f]; \ |
| } while (0) |
| |
| #define ITERATIONS 16 |
| #define HALF_ITERATIONS 8 |
| |
| static const uint32_t 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, }}; |
| |
| static const uint32_t DES_SPtrans[8][64] = { |
| { // nibble 0 |
| 0x02080800, 0x00080000, 0x02000002, 0x02080802, 0x02000000, |
| 0x00080802, 0x00080002, 0x02000002, 0x00080802, 0x02080800, |
| 0x02080000, 0x00000802, 0x02000802, 0x02000000, 0x00000000, |
| 0x00080002, 0x00080000, 0x00000002, 0x02000800, 0x00080800, |
| 0x02080802, 0x02080000, 0x00000802, 0x02000800, 0x00000002, |
| 0x00000800, 0x00080800, 0x02080002, 0x00000800, 0x02000802, |
| 0x02080002, 0x00000000, 0x00000000, 0x02080802, 0x02000800, |
| 0x00080002, 0x02080800, 0x00080000, 0x00000802, 0x02000800, |
| 0x02080002, 0x00000800, 0x00080800, 0x02000002, 0x00080802, |
| 0x00000002, 0x02000002, 0x02080000, 0x02080802, 0x00080800, |
| 0x02080000, 0x02000802, 0x02000000, 0x00000802, 0x00080002, |
| 0x00000000, 0x00080000, 0x02000000, 0x02000802, 0x02080800, |
| 0x00000002, 0x02080002, 0x00000800, 0x00080802, }, |
| { // nibble 1 |
| 0x40108010, 0x00000000, 0x00108000, 0x40100000, 0x40000010, |
| 0x00008010, 0x40008000, 0x00108000, 0x00008000, 0x40100010, |
| 0x00000010, 0x40008000, 0x00100010, 0x40108000, 0x40100000, |
| 0x00000010, 0x00100000, 0x40008010, 0x40100010, 0x00008000, |
| 0x00108010, 0x40000000, 0x00000000, 0x00100010, 0x40008010, |
| 0x00108010, 0x40108000, 0x40000010, 0x40000000, 0x00100000, |
| 0x00008010, 0x40108010, 0x00100010, 0x40108000, 0x40008000, |
| 0x00108010, 0x40108010, 0x00100010, 0x40000010, 0x00000000, |
| 0x40000000, 0x00008010, 0x00100000, 0x40100010, 0x00008000, |
| 0x40000000, 0x00108010, 0x40008010, 0x40108000, 0x00008000, |
| 0x00000000, 0x40000010, 0x00000010, 0x40108010, 0x00108000, |
| 0x40100000, 0x40100010, 0x00100000, 0x00008010, 0x40008000, |
| 0x40008010, 0x00000010, 0x40100000, 0x00108000, }, |
| { // nibble 2 |
| 0x04000001, 0x04040100, 0x00000100, 0x04000101, 0x00040001, |
| 0x04000000, 0x04000101, 0x00040100, 0x04000100, 0x00040000, |
| 0x04040000, 0x00000001, 0x04040101, 0x00000101, 0x00000001, |
| 0x04040001, 0x00000000, 0x00040001, 0x04040100, 0x00000100, |
| 0x00000101, 0x04040101, 0x00040000, 0x04000001, 0x04040001, |
| 0x04000100, 0x00040101, 0x04040000, 0x00040100, 0x00000000, |
| 0x04000000, 0x00040101, 0x04040100, 0x00000100, 0x00000001, |
| 0x00040000, 0x00000101, 0x00040001, 0x04040000, 0x04000101, |
| 0x00000000, 0x04040100, 0x00040100, 0x04040001, 0x00040001, |
| 0x04000000, 0x04040101, 0x00000001, 0x00040101, 0x04000001, |
| 0x04000000, 0x04040101, 0x00040000, 0x04000100, 0x04000101, |
| 0x00040100, 0x04000100, 0x00000000, 0x04040001, 0x00000101, |
| 0x04000001, 0x00040101, 0x00000100, 0x04040000, }, |
| { // nibble 3 |
| 0x00401008, 0x10001000, 0x00000008, 0x10401008, 0x00000000, |
| 0x10400000, 0x10001008, 0x00400008, 0x10401000, 0x10000008, |
| 0x10000000, 0x00001008, 0x10000008, 0x00401008, 0x00400000, |
| 0x10000000, 0x10400008, 0x00401000, 0x00001000, 0x00000008, |
| 0x00401000, 0x10001008, 0x10400000, 0x00001000, 0x00001008, |
| 0x00000000, 0x00400008, 0x10401000, 0x10001000, 0x10400008, |
| 0x10401008, 0x00400000, 0x10400008, 0x00001008, 0x00400000, |
| 0x10000008, 0x00401000, 0x10001000, 0x00000008, 0x10400000, |
| 0x10001008, 0x00000000, 0x00001000, 0x00400008, 0x00000000, |
| 0x10400008, 0x10401000, 0x00001000, 0x10000000, 0x10401008, |
| 0x00401008, 0x00400000, 0x10401008, 0x00000008, 0x10001000, |
| 0x00401008, 0x00400008, 0x00401000, 0x10400000, 0x10001008, |
| 0x00001008, 0x10000000, 0x10000008, 0x10401000, }, |
| { // nibble 4 |
| 0x08000000, 0x00010000, 0x00000400, 0x08010420, 0x08010020, |
| 0x08000400, 0x00010420, 0x08010000, 0x00010000, 0x00000020, |
| 0x08000020, 0x00010400, 0x08000420, 0x08010020, 0x08010400, |
| 0x00000000, 0x00010400, 0x08000000, 0x00010020, 0x00000420, |
| 0x08000400, 0x00010420, 0x00000000, 0x08000020, 0x00000020, |
| 0x08000420, 0x08010420, 0x00010020, 0x08010000, 0x00000400, |
| 0x00000420, 0x08010400, 0x08010400, 0x08000420, 0x00010020, |
| 0x08010000, 0x00010000, 0x00000020, 0x08000020, 0x08000400, |
| 0x08000000, 0x00010400, 0x08010420, 0x00000000, 0x00010420, |
| 0x08000000, 0x00000400, 0x00010020, 0x08000420, 0x00000400, |
| 0x00000000, 0x08010420, 0x08010020, 0x08010400, 0x00000420, |
| 0x00010000, 0x00010400, 0x08010020, 0x08000400, 0x00000420, |
| 0x00000020, 0x00010420, 0x08010000, 0x08000020, }, |
| { // nibble 5 |
| 0x80000040, 0x00200040, 0x00000000, 0x80202000, 0x00200040, |
| 0x00002000, 0x80002040, 0x00200000, 0x00002040, 0x80202040, |
| 0x00202000, 0x80000000, 0x80002000, 0x80000040, 0x80200000, |
| 0x00202040, 0x00200000, 0x80002040, 0x80200040, 0x00000000, |
| 0x00002000, 0x00000040, 0x80202000, 0x80200040, 0x80202040, |
| 0x80200000, 0x80000000, 0x00002040, 0x00000040, 0x00202000, |
| 0x00202040, 0x80002000, 0x00002040, 0x80000000, 0x80002000, |
| 0x00202040, 0x80202000, 0x00200040, 0x00000000, 0x80002000, |
| 0x80000000, 0x00002000, 0x80200040, 0x00200000, 0x00200040, |
| 0x80202040, 0x00202000, 0x00000040, 0x80202040, 0x00202000, |
| 0x00200000, 0x80002040, 0x80000040, 0x80200000, 0x00202040, |
| 0x00000000, 0x00002000, 0x80000040, 0x80002040, 0x80202000, |
| 0x80200000, 0x00002040, 0x00000040, 0x80200040, }, |
| { // nibble 6 |
| 0x00004000, 0x00000200, 0x01000200, 0x01000004, 0x01004204, |
| 0x00004004, 0x00004200, 0x00000000, 0x01000000, 0x01000204, |
| 0x00000204, 0x01004000, 0x00000004, 0x01004200, 0x01004000, |
| 0x00000204, 0x01000204, 0x00004000, 0x00004004, 0x01004204, |
| 0x00000000, 0x01000200, 0x01000004, 0x00004200, 0x01004004, |
| 0x00004204, 0x01004200, 0x00000004, 0x00004204, 0x01004004, |
| 0x00000200, 0x01000000, 0x00004204, 0x01004000, 0x01004004, |
| 0x00000204, 0x00004000, 0x00000200, 0x01000000, 0x01004004, |
| 0x01000204, 0x00004204, 0x00004200, 0x00000000, 0x00000200, |
| 0x01000004, 0x00000004, 0x01000200, 0x00000000, 0x01000204, |
| 0x01000200, 0x00004200, 0x00000204, 0x00004000, 0x01004204, |
| 0x01000000, 0x01004200, 0x00000004, 0x00004004, 0x01004204, |
| 0x01000004, 0x01004200, 0x01004000, 0x00004004, }, |
| { // nibble 7 |
| 0x20800080, 0x20820000, 0x00020080, 0x00000000, 0x20020000, |
| 0x00800080, 0x20800000, 0x20820080, 0x00000080, 0x20000000, |
| 0x00820000, 0x00020080, 0x00820080, 0x20020080, 0x20000080, |
| 0x20800000, 0x00020000, 0x00820080, 0x00800080, 0x20020000, |
| 0x20820080, 0x20000080, 0x00000000, 0x00820000, 0x20000000, |
| 0x00800000, 0x20020080, 0x20800080, 0x00800000, 0x00020000, |
| 0x20820000, 0x00000080, 0x00800000, 0x00020000, 0x20000080, |
| 0x20820080, 0x00020080, 0x20000000, 0x00000000, 0x00820000, |
| 0x20800080, 0x20020080, 0x20020000, 0x00800080, 0x20820000, |
| 0x00000080, 0x00800080, 0x20020000, 0x20820080, 0x00800000, |
| 0x20800000, 0x20000080, 0x00820000, 0x00020080, 0x20020080, |
| 0x20800000, 0x00000080, 0x20820000, 0x00820080, 0x00000000, |
| 0x20000000, 0x20800080, 0x00020000, 0x00820080, }}; |
| |
| #define HPERM_OP(a, t, n, m) \ |
| ((t) = ((((a) << (16 - (n))) ^ (a)) & (m)), \ |
| (a) = (a) ^ (t) ^ ((t) >> (16 - (n)))) |
| |
| void DES_set_key(const DES_cblock *key, DES_key_schedule *schedule) { |
| DES_set_key_ex(key->bytes, schedule); |
| } |
| |
| void DES_set_key_ex(const uint8_t key[8], DES_key_schedule *schedule) { |
| static const int shifts2[16] = {0, 0, 1, 1, 1, 1, 1, 1, |
| 0, 1, 1, 1, 1, 1, 1, 0}; |
| uint32_t c, d, t, s, t2; |
| const uint8_t *in; |
| int i; |
| |
| in = key; |
| |
| c2l(in, c); |
| c2l(in, d); |
| |
| // do PC1 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 |
| t2 = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff; |
| schedule->subkeys[i][0] = CRYPTO_rotr_u32(t2, 30); |
| |
| t2 = ((s >> 16) | (t & 0xffff0000)); |
| schedule->subkeys[i][1] = CRYPTO_rotr_u32(t2, 26); |
| } |
| } |
| |
| static const uint8_t kOddParity[256] = { |
| 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, |
| 14, 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, |
| 31, 31, 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, |
| 44, 47, 47, 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, |
| 61, 61, 62, 62, 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, |
| 74, 76, 76, 79, 79, 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, |
| 91, 91, 93, 93, 94, 94, 97, 97, 98, 98, 100, 100, 103, 103, 104, |
| 104, 107, 107, 109, 109, 110, 110, 112, 112, 115, 115, 117, 117, 118, 118, |
| 121, 121, 122, 122, 124, 124, 127, 127, 128, 128, 131, 131, 133, 133, 134, |
| 134, 137, 137, 138, 138, 140, 140, 143, 143, 145, 145, 146, 146, 148, 148, |
| 151, 151, 152, 152, 155, 155, 157, 157, 158, 158, 161, 161, 162, 162, 164, |
| 164, 167, 167, 168, 168, 171, 171, 173, 173, 174, 174, 176, 176, 179, 179, |
| 181, 181, 182, 182, 185, 185, 186, 186, 188, 188, 191, 191, 193, 193, 194, |
| 194, 196, 196, 199, 199, 200, 200, 203, 203, 205, 205, 206, 206, 208, 208, |
| 211, 211, 213, 213, 214, 214, 217, 217, 218, 218, 220, 220, 223, 223, 224, |
| 224, 227, 227, 229, 229, 230, 230, 233, 233, 234, 234, 236, 236, 239, 239, |
| 241, 241, 242, 242, 244, 244, 247, 247, 248, 248, 251, 251, 253, 253, 254, |
| 254 |
| }; |
| |
| void DES_set_odd_parity(DES_cblock *key) { |
| unsigned i; |
| |
| for (i = 0; i < DES_KEY_SZ; i++) { |
| key->bytes[i] = kOddParity[key->bytes[i]]; |
| } |
| } |
| |
| static void DES_encrypt1(uint32_t data[2], const DES_key_schedule *ks, |
| int enc) { |
| uint32_t l, r, t, u; |
| |
| r = data[0]; |
| l = data[1]; |
| |
| IP(r, l); |
| // 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. |
| // clear the top bits on machines with 8byte longs |
| // shift left by 2 |
| r = CRYPTO_rotr_u32(r, 29); |
| l = CRYPTO_rotr_u32(l, 29); |
| |
| // I don't know if it is worth the effort of loop unrolling the |
| // inner loop |
| if (enc) { |
| D_ENCRYPT(ks, l, r, 0); |
| D_ENCRYPT(ks, r, l, 1); |
| D_ENCRYPT(ks, l, r, 2); |
| D_ENCRYPT(ks, r, l, 3); |
| D_ENCRYPT(ks, l, r, 4); |
| D_ENCRYPT(ks, r, l, 5); |
| D_ENCRYPT(ks, l, r, 6); |
| D_ENCRYPT(ks, r, l, 7); |
| D_ENCRYPT(ks, l, r, 8); |
| D_ENCRYPT(ks, r, l, 9); |
| D_ENCRYPT(ks, l, r, 10); |
| D_ENCRYPT(ks, r, l, 11); |
| D_ENCRYPT(ks, l, r, 12); |
| D_ENCRYPT(ks, r, l, 13); |
| D_ENCRYPT(ks, l, r, 14); |
| D_ENCRYPT(ks, r, l, 15); |
| } else { |
| D_ENCRYPT(ks, l, r, 15); |
| D_ENCRYPT(ks, r, l, 14); |
| D_ENCRYPT(ks, l, r, 13); |
| D_ENCRYPT(ks, r, l, 12); |
| D_ENCRYPT(ks, l, r, 11); |
| D_ENCRYPT(ks, r, l, 10); |
| D_ENCRYPT(ks, l, r, 9); |
| D_ENCRYPT(ks, r, l, 8); |
| D_ENCRYPT(ks, l, r, 7); |
| D_ENCRYPT(ks, r, l, 6); |
| D_ENCRYPT(ks, l, r, 5); |
| D_ENCRYPT(ks, r, l, 4); |
| D_ENCRYPT(ks, l, r, 3); |
| D_ENCRYPT(ks, r, l, 2); |
| D_ENCRYPT(ks, l, r, 1); |
| D_ENCRYPT(ks, r, l, 0); |
| } |
| |
| // rotate and clear the top bits on machines with 8byte longs |
| l = CRYPTO_rotr_u32(l, 3); |
| r = CRYPTO_rotr_u32(r, 3); |
| |
| FP(r, l); |
| data[0] = l; |
| data[1] = r; |
| } |
| |
| static void DES_encrypt2(uint32_t data[2], const DES_key_schedule *ks, |
| int enc) { |
| uint32_t l, r, t, u; |
| |
| r = data[0]; |
| l = data[1]; |
| |
| // 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. |
| // clear the top bits on machines with 8byte longs |
| r = CRYPTO_rotr_u32(r, 29); |
| l = CRYPTO_rotr_u32(l, 29); |
| |
| // I don't know if it is worth the effort of loop unrolling the |
| // inner loop |
| if (enc) { |
| D_ENCRYPT(ks, l, r, 0); |
| D_ENCRYPT(ks, r, l, 1); |
| D_ENCRYPT(ks, l, r, 2); |
| D_ENCRYPT(ks, r, l, 3); |
| D_ENCRYPT(ks, l, r, 4); |
| D_ENCRYPT(ks, r, l, 5); |
| D_ENCRYPT(ks, l, r, 6); |
| D_ENCRYPT(ks, r, l, 7); |
| D_ENCRYPT(ks, l, r, 8); |
| D_ENCRYPT(ks, r, l, 9); |
| D_ENCRYPT(ks, l, r, 10); |
| D_ENCRYPT(ks, r, l, 11); |
| D_ENCRYPT(ks, l, r, 12); |
| D_ENCRYPT(ks, r, l, 13); |
| D_ENCRYPT(ks, l, r, 14); |
| D_ENCRYPT(ks, r, l, 15); |
| } else { |
| D_ENCRYPT(ks, l, r, 15); |
| D_ENCRYPT(ks, r, l, 14); |
| D_ENCRYPT(ks, l, r, 13); |
| D_ENCRYPT(ks, r, l, 12); |
| D_ENCRYPT(ks, l, r, 11); |
| D_ENCRYPT(ks, r, l, 10); |
| D_ENCRYPT(ks, l, r, 9); |
| D_ENCRYPT(ks, r, l, 8); |
| D_ENCRYPT(ks, l, r, 7); |
| D_ENCRYPT(ks, r, l, 6); |
| D_ENCRYPT(ks, l, r, 5); |
| D_ENCRYPT(ks, r, l, 4); |
| D_ENCRYPT(ks, l, r, 3); |
| D_ENCRYPT(ks, r, l, 2); |
| D_ENCRYPT(ks, l, r, 1); |
| D_ENCRYPT(ks, r, l, 0); |
| } |
| // rotate and clear the top bits on machines with 8byte longs |
| data[0] = CRYPTO_rotr_u32(l, 3); |
| data[1] = CRYPTO_rotr_u32(r, 3); |
| } |
| |
| void DES_encrypt3(uint32_t data[2], const DES_key_schedule *ks1, |
| const DES_key_schedule *ks2, const DES_key_schedule *ks3) { |
| uint32_t l, r; |
| |
| l = data[0]; |
| r = data[1]; |
| IP(l, r); |
| data[0] = l; |
| data[1] = r; |
| DES_encrypt2(data, ks1, DES_ENCRYPT); |
| DES_encrypt2(data, ks2, DES_DECRYPT); |
| DES_encrypt2(data, ks3, DES_ENCRYPT); |
| l = data[0]; |
| r = data[1]; |
| FP(r, l); |
| data[0] = l; |
| data[1] = r; |
| } |
| |
| void DES_decrypt3(uint32_t data[2], const DES_key_schedule *ks1, |
| const DES_key_schedule *ks2, const DES_key_schedule *ks3) { |
| uint32_t l, r; |
| |
| l = data[0]; |
| r = data[1]; |
| IP(l, r); |
| data[0] = l; |
| data[1] = r; |
| DES_encrypt2(data, ks3, DES_DECRYPT); |
| DES_encrypt2(data, ks2, DES_ENCRYPT); |
| DES_encrypt2(data, ks1, DES_DECRYPT); |
| l = data[0]; |
| r = data[1]; |
| FP(r, l); |
| data[0] = l; |
| data[1] = r; |
| } |
| |
| void DES_ecb_encrypt(const DES_cblock *in_block, DES_cblock *out_block, |
| const DES_key_schedule *schedule, int is_encrypt) { |
| DES_ecb_encrypt_ex(in_block->bytes, out_block->bytes, schedule, is_encrypt); |
| } |
| |
| void DES_ecb_encrypt_ex(const uint8_t in[8], uint8_t out[8], |
| const DES_key_schedule *schedule, int is_encrypt) { |
| uint32_t ll[2]; |
| ll[0] = CRYPTO_load_u32_le(in); |
| ll[1] = CRYPTO_load_u32_le(in + 4); |
| DES_encrypt1(ll, schedule, is_encrypt); |
| CRYPTO_store_u32_le(out, ll[0]); |
| CRYPTO_store_u32_le(out + 4, ll[1]); |
| } |
| |
| void DES_ncbc_encrypt(const uint8_t *in, uint8_t *out, size_t len, |
| const DES_key_schedule *schedule, DES_cblock *ivec, |
| int enc) { |
| DES_ncbc_encrypt_ex(in, out, len, schedule, ivec->bytes, enc); |
| } |
| |
| void DES_ncbc_encrypt_ex(const uint8_t *in, uint8_t *out, size_t len, |
| const DES_key_schedule *schedule, uint8_t ivec[8], |
| int enc) { |
| uint32_t tin0, tin1; |
| uint32_t tout0, tout1, xor0, xor1; |
| uint32_t tin[2]; |
| unsigned char *iv; |
| |
| iv = ivec; |
| |
| if (enc) { |
| c2l(iv, tout0); |
| c2l(iv, tout1); |
| for (; len >= 8; len -= 8) { |
| c2l(in, tin0); |
| c2l(in, tin1); |
| tin0 ^= tout0; |
| tin[0] = tin0; |
| tin1 ^= tout1; |
| tin[1] = tin1; |
| DES_encrypt1(tin, schedule, DES_ENCRYPT); |
| tout0 = tin[0]; |
| l2c(tout0, out); |
| tout1 = tin[1]; |
| l2c(tout1, out); |
| } |
| if (len != 0) { |
| c2ln(in, tin0, tin1, len); |
| tin0 ^= tout0; |
| tin[0] = tin0; |
| tin1 ^= tout1; |
| tin[1] = tin1; |
| DES_encrypt1(tin, schedule, DES_ENCRYPT); |
| tout0 = tin[0]; |
| l2c(tout0, out); |
| tout1 = tin[1]; |
| l2c(tout1, out); |
| } |
| iv = ivec; |
| l2c(tout0, iv); |
| l2c(tout1, iv); |
| } else { |
| c2l(iv, xor0); |
| c2l(iv, xor1); |
| for (; len >= 8; len -= 8) { |
| c2l(in, tin0); |
| tin[0] = tin0; |
| c2l(in, tin1); |
| tin[1] = tin1; |
| DES_encrypt1(tin, schedule, DES_DECRYPT); |
| tout0 = tin[0] ^ xor0; |
| tout1 = tin[1] ^ xor1; |
| l2c(tout0, out); |
| l2c(tout1, out); |
| xor0 = tin0; |
| xor1 = tin1; |
| } |
| if (len != 0) { |
| c2l(in, tin0); |
| tin[0] = tin0; |
| c2l(in, tin1); |
| tin[1] = tin1; |
| DES_encrypt1(tin, schedule, DES_DECRYPT); |
| tout0 = tin[0] ^ xor0; |
| tout1 = tin[1] ^ xor1; |
| l2cn(tout0, tout1, out, len); |
| xor0 = tin0; |
| xor1 = tin1; |
| } |
| iv = ivec; |
| l2c(xor0, iv); |
| l2c(xor1, iv); |
| } |
| tin[0] = tin[1] = 0; |
| } |
| |
| void DES_ecb3_encrypt(const DES_cblock *input, DES_cblock *output, |
| const DES_key_schedule *ks1, const DES_key_schedule *ks2, |
| const DES_key_schedule *ks3, int enc) { |
| DES_ecb3_encrypt_ex(input->bytes, output->bytes, ks1, ks2, ks3, enc); |
| } |
| |
| void DES_ecb3_encrypt_ex(const uint8_t in[8], uint8_t out[8], |
| const DES_key_schedule *ks1, |
| const DES_key_schedule *ks2, |
| const DES_key_schedule *ks3, int enc) { |
| uint32_t ll[2]; |
| ll[0] = CRYPTO_load_u32_le(in); |
| ll[1] = CRYPTO_load_u32_le(in + 4); |
| if (enc) { |
| DES_encrypt3(ll, ks1, ks2, ks3); |
| } else { |
| DES_decrypt3(ll, ks1, ks2, ks3); |
| } |
| CRYPTO_store_u32_le(out, ll[0]); |
| CRYPTO_store_u32_le(out + 4, ll[1]); |
| } |
| |
| void DES_ede3_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len, |
| const DES_key_schedule *ks1, |
| const DES_key_schedule *ks2, |
| const DES_key_schedule *ks3, DES_cblock *ivec, |
| int enc) { |
| DES_ede3_cbc_encrypt_ex(in, out, len, ks1, ks2, ks3, ivec->bytes, enc); |
| } |
| |
| void DES_ede3_cbc_encrypt_ex(const uint8_t *in, uint8_t *out, size_t len, |
| const DES_key_schedule *ks1, |
| const DES_key_schedule *ks2, |
| const DES_key_schedule *ks3, uint8_t ivec[8], |
| int enc) { |
| uint32_t tin0, tin1; |
| uint32_t tout0, tout1, xor0, xor1; |
| uint32_t tin[2]; |
| uint8_t *iv; |
| |
| iv = ivec; |
| |
| if (enc) { |
| c2l(iv, tout0); |
| c2l(iv, tout1); |
| for (; len >= 8; len -= 8) { |
| c2l(in, tin0); |
| c2l(in, tin1); |
| tin0 ^= tout0; |
| tin1 ^= tout1; |
| |
| tin[0] = tin0; |
| tin[1] = tin1; |
| DES_encrypt3(tin, ks1, ks2, ks3); |
| tout0 = tin[0]; |
| tout1 = tin[1]; |
| |
| l2c(tout0, out); |
| l2c(tout1, out); |
| } |
| if (len != 0) { |
| c2ln(in, tin0, tin1, len); |
| tin0 ^= tout0; |
| tin1 ^= tout1; |
| |
| tin[0] = tin0; |
| tin[1] = tin1; |
| DES_encrypt3(tin, ks1, ks2, ks3); |
| tout0 = tin[0]; |
| tout1 = tin[1]; |
| |
| l2c(tout0, out); |
| l2c(tout1, out); |
| } |
| iv = ivec; |
| l2c(tout0, iv); |
| l2c(tout1, iv); |
| } else { |
| uint32_t t0, t1; |
| |
| c2l(iv, xor0); |
| c2l(iv, xor1); |
| for (; len >= 8; len -= 8) { |
| c2l(in, tin0); |
| c2l(in, tin1); |
| |
| t0 = tin0; |
| t1 = tin1; |
| |
| tin[0] = tin0; |
| tin[1] = tin1; |
| DES_decrypt3(tin, ks1, ks2, ks3); |
| tout0 = tin[0]; |
| tout1 = tin[1]; |
| |
| tout0 ^= xor0; |
| tout1 ^= xor1; |
| l2c(tout0, out); |
| l2c(tout1, out); |
| xor0 = t0; |
| xor1 = t1; |
| } |
| if (len != 0) { |
| c2l(in, tin0); |
| c2l(in, tin1); |
| |
| t0 = tin0; |
| t1 = tin1; |
| |
| tin[0] = tin0; |
| tin[1] = tin1; |
| DES_decrypt3(tin, ks1, ks2, ks3); |
| tout0 = tin[0]; |
| tout1 = tin[1]; |
| |
| tout0 ^= xor0; |
| tout1 ^= xor1; |
| l2cn(tout0, tout1, out, len); |
| xor0 = t0; |
| xor1 = t1; |
| } |
| |
| iv = ivec; |
| l2c(xor0, iv); |
| l2c(xor1, iv); |
| } |
| |
| tin[0] = tin[1] = 0; |
| } |
| |
| void DES_ede2_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len, |
| const DES_key_schedule *ks1, |
| const DES_key_schedule *ks2, |
| DES_cblock *ivec, |
| int enc) { |
| DES_ede3_cbc_encrypt(in, out, len, ks1, ks2, ks1, ivec, enc); |
| } |
| |
| |
| // Deprecated functions. |
| |
| void DES_set_key_unchecked(const DES_cblock *key, DES_key_schedule *schedule) { |
| DES_set_key(key, schedule); |
| } |
