ref: 68fe504f349dd77566041e69f6b2534ec57707e0
dir: /libsec/des.c/
#include "os.h" #include <libsec.h> /* * integrated sbox & p perm */ static u32int spbox[] = { 0x00808200,0x00000000,0x00008000,0x00808202,0x00808002,0x00008202,0x00000002,0x00008000, 0x00000200,0x00808200,0x00808202,0x00000200,0x00800202,0x00808002,0x00800000,0x00000002, 0x00000202,0x00800200,0x00800200,0x00008200,0x00008200,0x00808000,0x00808000,0x00800202, 0x00008002,0x00800002,0x00800002,0x00008002,0x00000000,0x00000202,0x00008202,0x00800000, 0x00008000,0x00808202,0x00000002,0x00808000,0x00808200,0x00800000,0x00800000,0x00000200, 0x00808002,0x00008000,0x00008200,0x00800002,0x00000200,0x00000002,0x00800202,0x00008202, 0x00808202,0x00008002,0x00808000,0x00800202,0x00800002,0x00000202,0x00008202,0x00808200, 0x00000202,0x00800200,0x00800200,0x00000000,0x00008002,0x00008200,0x00000000,0x00808002, 0x40084010,0x40004000,0x00004000,0x00084010,0x00080000,0x00000010,0x40080010,0x40004010, 0x40000010,0x40084010,0x40084000,0x40000000,0x40004000,0x00080000,0x00000010,0x40080010, 0x00084000,0x00080010,0x40004010,0x00000000,0x40000000,0x00004000,0x00084010,0x40080000, 0x00080010,0x40000010,0x00000000,0x00084000,0x00004010,0x40084000,0x40080000,0x00004010, 0x00000000,0x00084010,0x40080010,0x00080000,0x40004010,0x40080000,0x40084000,0x00004000, 0x40080000,0x40004000,0x00000010,0x40084010,0x00084010,0x00000010,0x00004000,0x40000000, 0x00004010,0x40084000,0x00080000,0x40000010,0x00080010,0x40004010,0x40000010,0x00080010, 0x00084000,0x00000000,0x40004000,0x00004010,0x40000000,0x40080010,0x40084010,0x00084000, 0x00000104,0x04010100,0x00000000,0x04010004,0x04000100,0x00000000,0x00010104,0x04000100, 0x00010004,0x04000004,0x04000004,0x00010000,0x04010104,0x00010004,0x04010000,0x00000104, 0x04000000,0x00000004,0x04010100,0x00000100,0x00010100,0x04010000,0x04010004,0x00010104, 0x04000104,0x00010100,0x00010000,0x04000104,0x00000004,0x04010104,0x00000100,0x04000000, 0x04010100,0x04000000,0x00010004,0x00000104,0x00010000,0x04010100,0x04000100,0x00000000, 0x00000100,0x00010004,0x04010104,0x04000100,0x04000004,0x00000100,0x00000000,0x04010004, 0x04000104,0x00010000,0x04000000,0x04010104,0x00000004,0x00010104,0x00010100,0x04000004, 0x04010000,0x04000104,0x00000104,0x04010000,0x00010104,0x00000004,0x04010004,0x00010100, 0x80401000,0x80001040,0x80001040,0x00000040,0x00401040,0x80400040,0x80400000,0x80001000, 0x00000000,0x00401000,0x00401000,0x80401040,0x80000040,0x00000000,0x00400040,0x80400000, 0x80000000,0x00001000,0x00400000,0x80401000,0x00000040,0x00400000,0x80001000,0x00001040, 0x80400040,0x80000000,0x00001040,0x00400040,0x00001000,0x00401040,0x80401040,0x80000040, 0x00400040,0x80400000,0x00401000,0x80401040,0x80000040,0x00000000,0x00000000,0x00401000, 0x00001040,0x00400040,0x80400040,0x80000000,0x80401000,0x80001040,0x80001040,0x00000040, 0x80401040,0x80000040,0x80000000,0x00001000,0x80400000,0x80001000,0x00401040,0x80400040, 0x80001000,0x00001040,0x00400000,0x80401000,0x00000040,0x00400000,0x00001000,0x00401040, 0x00000080,0x01040080,0x01040000,0x21000080,0x00040000,0x00000080,0x20000000,0x01040000, 0x20040080,0x00040000,0x01000080,0x20040080,0x21000080,0x21040000,0x00040080,0x20000000, 0x01000000,0x20040000,0x20040000,0x00000000,0x20000080,0x21040080,0x21040080,0x01000080, 0x21040000,0x20000080,0x00000000,0x21000000,0x01040080,0x01000000,0x21000000,0x00040080, 0x00040000,0x21000080,0x00000080,0x01000000,0x20000000,0x01040000,0x21000080,0x20040080, 0x01000080,0x20000000,0x21040000,0x01040080,0x20040080,0x00000080,0x01000000,0x21040000, 0x21040080,0x00040080,0x21000000,0x21040080,0x01040000,0x00000000,0x20040000,0x21000000, 0x00040080,0x01000080,0x20000080,0x00040000,0x00000000,0x20040000,0x01040080,0x20000080, 0x10000008,0x10200000,0x00002000,0x10202008,0x10200000,0x00000008,0x10202008,0x00200000, 0x10002000,0x00202008,0x00200000,0x10000008,0x00200008,0x10002000,0x10000000,0x00002008, 0x00000000,0x00200008,0x10002008,0x00002000,0x00202000,0x10002008,0x00000008,0x10200008, 0x10200008,0x00000000,0x00202008,0x10202000,0x00002008,0x00202000,0x10202000,0x10000000, 0x10002000,0x00000008,0x10200008,0x00202000,0x10202008,0x00200000,0x00002008,0x10000008, 0x00200000,0x10002000,0x10000000,0x00002008,0x10000008,0x10202008,0x00202000,0x10200000, 0x00202008,0x10202000,0x00000000,0x10200008,0x00000008,0x00002000,0x10200000,0x00202008, 0x00002000,0x00200008,0x10002008,0x00000000,0x10202000,0x10000000,0x00200008,0x10002008, 0x00100000,0x02100001,0x02000401,0x00000000,0x00000400,0x02000401,0x00100401,0x02100400, 0x02100401,0x00100000,0x00000000,0x02000001,0x00000001,0x02000000,0x02100001,0x00000401, 0x02000400,0x00100401,0x00100001,0x02000400,0x02000001,0x02100000,0x02100400,0x00100001, 0x02100000,0x00000400,0x00000401,0x02100401,0x00100400,0x00000001,0x02000000,0x00100400, 0x02000000,0x00100400,0x00100000,0x02000401,0x02000401,0x02100001,0x02100001,0x00000001, 0x00100001,0x02000000,0x02000400,0x00100000,0x02100400,0x00000401,0x00100401,0x02100400, 0x00000401,0x02000001,0x02100401,0x02100000,0x00100400,0x00000000,0x00000001,0x02100401, 0x00000000,0x00100401,0x02100000,0x00000400,0x02000001,0x02000400,0x00000400,0x00100001, 0x08000820,0x00000800,0x00020000,0x08020820,0x08000000,0x08000820,0x00000020,0x08000000, 0x00020020,0x08020000,0x08020820,0x00020800,0x08020800,0x00020820,0x00000800,0x00000020, 0x08020000,0x08000020,0x08000800,0x00000820,0x00020800,0x00020020,0x08020020,0x08020800, 0x00000820,0x00000000,0x00000000,0x08020020,0x08000020,0x08000800,0x00020820,0x00020000, 0x00020820,0x00020000,0x08020800,0x00000800,0x00000020,0x08020020,0x00000800,0x00020820, 0x08000800,0x00000020,0x08000020,0x08020000,0x08020020,0x08000000,0x00020000,0x08000820, 0x00000000,0x08020820,0x00020020,0x08000020,0x08020000,0x08000800,0x08000820,0x00000000, 0x08020820,0x00020800,0x00020800,0x00000820,0x00000820,0x00020020,0x08000000,0x08020800, }; /* * for manual index calculation * #define fetch(box, i, sh) (*((u32int*)((uchar*)spbox + (box << 8) + ((i >> (sh)) & 0xfc)))) */ #define fetch(box, i, sh) ((spbox+(box << 6))[((i >> (sh + 2)) & 0x3f)]) /* * DES electronic codebook encryption of one block */ void block_cipher(ulong key[32], uchar text[8], int decrypting) { u32int right, left, v0, v1; int i, keystep; /* * initial permutation */ v0 = text[0] | ((u32int)text[2]<<8) | ((u32int)text[4]<<16) | ((u32int)text[6]<<24); left = text[1] | ((u32int)text[3]<<8) | ((u32int)text[5]<<16) | ((u32int)text[7]<<24); right = (left & 0xaaaaaaaa) | ((v0 >> 1) & 0x55555555); left = ((left << 1) & 0xaaaaaaaa) | (v0 & 0x55555555); left = ((left << 6) & 0x33003300) | (left & 0xcc33cc33) | ((left >> 6) & 0x00cc00cc); left = ((left << 12) & 0x0f0f0000) | (left & 0xf0f00f0f) | ((left >> 12) & 0x0000f0f0); right = ((right << 6) & 0x33003300) | (right & 0xcc33cc33) | ((right >> 6) & 0x00cc00cc); right = ((right << 12) & 0x0f0f0000) | (right & 0xf0f00f0f) | ((right >> 12) & 0x0000f0f0); if (decrypting) { keystep = -2; key = key + 32 - 2; } else keystep = 2; for (i = 0; i < 8; i++) { v0 = key[0]; v0 ^= (right >> 1) | (right << 31); left ^= fetch(0, v0, 24) ^ fetch(2, v0, 16) ^ fetch(4, v0, 8) ^ fetch(6, v0, 0); v1 = key[1]; v1 ^= (right << 3) | (right >> 29); left ^= fetch(1, v1, 24) ^ fetch(3, v1, 16) ^ fetch(5, v1, 8) ^ fetch(7, v1, 0); key += keystep; v0 = key[0]; v0 ^= (left >> 1) | (left << 31); right ^= fetch(0, v0, 24) ^ fetch(2, v0, 16) ^ fetch(4, v0, 8) ^ fetch(6, v0, 0); v1 = key[1]; v1 ^= (left << 3) | (left >> 29); right ^= fetch(1, v1, 24) ^ fetch(3, v1, 16) ^ fetch(5, v1, 8) ^ fetch(7, v1, 0); key += keystep; } /* * final permutation, inverse initial permutation */ v0 = ((left << 1) & 0xaaaaaaaa) | (right & 0x55555555); v1 = (left & 0xaaaaaaaa) | ((right >> 1) & 0x55555555); v1 = ((v1 << 6) & 0x33003300) | (v1 & 0xcc33cc33) | ((v1 >> 6) & 0x00cc00cc); v1 = ((v1 << 12) & 0x0f0f0000) | (v1 & 0xf0f00f0f) | ((v1 >> 12) & 0x0000f0f0); v0 = ((v0 << 6) & 0x33003300) | (v0 & 0xcc33cc33) | ((v0 >> 6) & 0x00cc00cc); v0 = ((v0 << 12) & 0x0f0f0000) | (v0 & 0xf0f00f0f) | ((v0 >> 12) & 0x0000f0f0); text[0] = v0; text[2] = v0 >> 8; text[4] = v0 >> 16; text[6] = v0 >> 24; text[1] = v1; text[3] = v1 >> 8; text[5] = v1 >> 16; text[7] = v1 >> 24; } /* * triple DES electronic codebook encryption of one block */ void triple_block_cipher(ulong expanded_key[3][32], uchar text[8], int ende) { ulong *key; u32int right, left, v0, v1; int i, j, keystep; /* * initial permutation */ v0 = text[0] | ((u32int)text[2]<<8) | ((u32int)text[4]<<16) | ((u32int)text[6]<<24); left = text[1] | ((u32int)text[3]<<8) | ((u32int)text[5]<<16) | ((u32int)text[7]<<24); right = (left & 0xaaaaaaaa) | ((v0 >> 1) & 0x55555555); left = ((left << 1) & 0xaaaaaaaa) | (v0 & 0x55555555); left = ((left << 6) & 0x33003300) | (left & 0xcc33cc33) | ((left >> 6) & 0x00cc00cc); left = ((left << 12) & 0x0f0f0000) | (left & 0xf0f00f0f) | ((left >> 12) & 0x0000f0f0); right = ((right << 6) & 0x33003300) | (right & 0xcc33cc33) | ((right >> 6) & 0x00cc00cc); right = ((right << 12) & 0x0f0f0000) | (right & 0xf0f00f0f) | ((right >> 12) & 0x0000f0f0); for(j = 0; j < 3; j++){ if((ende & 1) == DES3D) { key = &expanded_key[2-j][32-2]; keystep = -2; } else { key = &expanded_key[j][0]; keystep = 2; } ende >>= 1; for (i = 0; i < 8; i++) { v0 = key[0]; v0 ^= (right >> 1) | (right << 31); left ^= fetch(0, v0, 24) ^ fetch(2, v0, 16) ^ fetch(4, v0, 8) ^ fetch(6, v0, 0); v1 = key[1]; v1 ^= (right << 3) | (right >> 29); left ^= fetch(1, v1, 24) ^ fetch(3, v1, 16) ^ fetch(5, v1, 8) ^ fetch(7, v1, 0); key += keystep; v0 = key[0]; v0 ^= (left >> 1) | (left << 31); right ^= fetch(0, v0, 24) ^ fetch(2, v0, 16) ^ fetch(4, v0, 8) ^ fetch(6, v0, 0); v1 = key[1]; v1 ^= (left << 3) | (left >> 29); right ^= fetch(1, v1, 24) ^ fetch(3, v1, 16) ^ fetch(5, v1, 8) ^ fetch(7, v1, 0); key += keystep; } v0 = left; left = right; right = v0; } /* * final permutation, inverse initial permutation * left and right are swapped here */ v0 = ((right << 1) & 0xaaaaaaaa) | (left & 0x55555555); v1 = (right & 0xaaaaaaaa) | ((left >> 1) & 0x55555555); v1 = ((v1 << 6) & 0x33003300) | (v1 & 0xcc33cc33) | ((v1 >> 6) & 0x00cc00cc); v1 = ((v1 << 12) & 0x0f0f0000) | (v1 & 0xf0f00f0f) | ((v1 >> 12) & 0x0000f0f0); v0 = ((v0 << 6) & 0x33003300) | (v0 & 0xcc33cc33) | ((v0 >> 6) & 0x00cc00cc); v0 = ((v0 << 12) & 0x0f0f0000) | (v0 & 0xf0f00f0f) | ((v0 >> 12) & 0x0000f0f0); text[0] = v0; text[2] = v0 >> 8; text[4] = v0 >> 16; text[6] = v0 >> 24; text[1] = v1; text[3] = v1 >> 8; text[5] = v1 >> 16; text[7] = v1 >> 24; } /* * key compression permutation, 4 bits at a time */ static u32int comptab[] = { 0x000000,0x010000,0x000008,0x010008,0x000080,0x010080,0x000088,0x010088, 0x000000,0x010000,0x000008,0x010008,0x000080,0x010080,0x000088,0x010088, 0x000000,0x100000,0x000800,0x100800,0x000000,0x100000,0x000800,0x100800, 0x002000,0x102000,0x002800,0x102800,0x002000,0x102000,0x002800,0x102800, 0x000000,0x000004,0x000400,0x000404,0x000000,0x000004,0x000400,0x000404, 0x400000,0x400004,0x400400,0x400404,0x400000,0x400004,0x400400,0x400404, 0x000000,0x000020,0x008000,0x008020,0x800000,0x800020,0x808000,0x808020, 0x000002,0x000022,0x008002,0x008022,0x800002,0x800022,0x808002,0x808022, 0x000000,0x000200,0x200000,0x200200,0x001000,0x001200,0x201000,0x201200, 0x000000,0x000200,0x200000,0x200200,0x001000,0x001200,0x201000,0x201200, 0x000000,0x000040,0x000010,0x000050,0x004000,0x004040,0x004010,0x004050, 0x040000,0x040040,0x040010,0x040050,0x044000,0x044040,0x044010,0x044050, 0x000000,0x000100,0x020000,0x020100,0x000001,0x000101,0x020001,0x020101, 0x080000,0x080100,0x0a0000,0x0a0100,0x080001,0x080101,0x0a0001,0x0a0101, 0x000000,0x000100,0x040000,0x040100,0x000000,0x000100,0x040000,0x040100, 0x000040,0x000140,0x040040,0x040140,0x000040,0x000140,0x040040,0x040140, 0x000000,0x400000,0x008000,0x408000,0x000008,0x400008,0x008008,0x408008, 0x000400,0x400400,0x008400,0x408400,0x000408,0x400408,0x008408,0x408408, 0x000000,0x001000,0x080000,0x081000,0x000020,0x001020,0x080020,0x081020, 0x004000,0x005000,0x084000,0x085000,0x004020,0x005020,0x084020,0x085020, 0x000000,0x000800,0x000000,0x000800,0x000010,0x000810,0x000010,0x000810, 0x800000,0x800800,0x800000,0x800800,0x800010,0x800810,0x800010,0x800810, 0x000000,0x010000,0x000200,0x010200,0x000000,0x010000,0x000200,0x010200, 0x100000,0x110000,0x100200,0x110200,0x100000,0x110000,0x100200,0x110200, 0x000000,0x000004,0x000000,0x000004,0x000080,0x000084,0x000080,0x000084, 0x002000,0x002004,0x002000,0x002004,0x002080,0x002084,0x002080,0x002084, 0x000000,0x000001,0x200000,0x200001,0x020000,0x020001,0x220000,0x220001, 0x000002,0x000003,0x200002,0x200003,0x020002,0x020003,0x220002,0x220003, }; static int keysh[] = { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1, }; static void keycompperm(u32int left, u32int right, ulong *ek) { u32int v0, v1; int i; for(i = 0; i < 16; i++){ left = (left << keysh[i]) | (left >> (28 - keysh[i])); left &= 0xfffffff0; right = (right << keysh[i]) | (right >> (28 - keysh[i])); right &= 0xfffffff0; v0 = comptab[6 * (1 << 4) + ((left >> (32-4)) & 0xf)] | comptab[5 * (1 << 4) + ((left >> (32-8)) & 0xf)] | comptab[4 * (1 << 4) + ((left >> (32-12)) & 0xf)] | comptab[3 * (1 << 4) + ((left >> (32-16)) & 0xf)] | comptab[2 * (1 << 4) + ((left >> (32-20)) & 0xf)] | comptab[1 * (1 << 4) + ((left >> (32-24)) & 0xf)] | comptab[0 * (1 << 4) + ((left >> (32-28)) & 0xf)]; v1 = comptab[13 * (1 << 4) + ((right >> (32-4)) & 0xf)] | comptab[12 * (1 << 4) + ((right >> (32-8)) & 0xf)] | comptab[11 * (1 << 4) + ((right >> (32-12)) & 0xf)] | comptab[10 * (1 << 4) + ((right >> (32-16)) & 0xf)] | comptab[9 * (1 << 4) + ((right >> (32-20)) & 0xf)] | comptab[8 * (1 << 4) + ((right >> (32-24)) & 0xf)] | comptab[7 * (1 << 4) + ((right >> (32-28)) & 0xf)]; ek[0] = (((v0 >> (24-6)) & 0x3f) << 26) | (((v0 >> (24-18)) & 0x3f) << 18) | (((v1 >> (24-6)) & 0x3f) << 10) | (((v1 >> (24-18)) & 0x3f) << 2); ek[1] = (((v0 >> (24-12)) & 0x3f) << 26) | (((v0 >> (24-24)) & 0x3f) << 18) | (((v1 >> (24-12)) & 0x3f) << 10) | (((v1 >> (24-24)) & 0x3f) << 2); ek += 2; } } void des_key_setup(uchar key[8], ulong *ek) { u32int left, right, v0, v1; v0 = key[0] | ((u32int)key[2] << 8) | ((u32int)key[4] << 16) | ((u32int)key[6] << 24); v1 = key[1] | ((u32int)key[3] << 8) | ((u32int)key[5] << 16) | ((u32int)key[7] << 24); left = ((v0 >> 1) & 0x40404040) | ((v0 >> 2) & 0x10101010) | ((v0 >> 3) & 0x04040404) | ((v0 >> 4) & 0x01010101) | ((v1 >> 0) & 0x80808080) | ((v1 >> 1) & 0x20202020) | ((v1 >> 2) & 0x08080808) | ((v1 >> 3) & 0x02020202); right = ((v0 >> 1) & 0x04040404) | ((v0 << 2) & 0x10101010) | ((v0 << 5) & 0x40404040) | ((v1 << 0) & 0x08080808) | ((v1 << 3) & 0x20202020) | ((v1 << 6) & 0x80808080); left = ((left << 6) & 0x33003300) | (left & 0xcc33cc33) | ((left >> 6) & 0x00cc00cc); v0 = ((left << 12) & 0x0f0f0000) | (left & 0xf0f00f0f) | ((left >> 12) & 0x0000f0f0); right = ((right << 6) & 0x33003300) | (right & 0xcc33cc33) | ((right >> 6) & 0x00cc00cc); v1 = ((right << 12) & 0x0f0f0000) | (right & 0xf0f00f0f) | ((right >> 12) & 0x0000f0f0); left = v0 & 0xfffffff0; right = (v1 & 0xffffff00) | ((v0 << 4) & 0xf0); keycompperm(left, right, ek); } static uchar parity[128] = { 0x01, 0x02, 0x04, 0x07, 0x08, 0x0b, 0x0d, 0x0e, 0x10, 0x13, 0x15, 0x16, 0x19, 0x1a, 0x1c, 0x1f, 0x20, 0x23, 0x25, 0x26, 0x29, 0x2a, 0x2c, 0x2f, 0x31, 0x32, 0x34, 0x37, 0x38, 0x3b, 0x3d, 0x3e, 0x40, 0x43, 0x45, 0x46, 0x49, 0x4a, 0x4c, 0x4f, 0x51, 0x52, 0x54, 0x57, 0x58, 0x5b, 0x5d, 0x5e, 0x61, 0x62, 0x64, 0x67, 0x68, 0x6b, 0x6d, 0x6e, 0x70, 0x73, 0x75, 0x76, 0x79, 0x7a, 0x7c, 0x7f, 0x80, 0x83, 0x85, 0x86, 0x89, 0x8a, 0x8c, 0x8f, 0x91, 0x92, 0x94, 0x97, 0x98, 0x9b, 0x9d, 0x9e, 0xa1, 0xa2, 0xa4, 0xa7, 0xa8, 0xab, 0xad, 0xae, 0xb0, 0xb3, 0xb5, 0xb6, 0xb9, 0xba, 0xbc, 0xbf, 0xc1, 0xc2, 0xc4, 0xc7, 0xc8, 0xcb, 0xcd, 0xce, 0xd0, 0xd3, 0xd5, 0xd6, 0xd9, 0xda, 0xdc, 0xdf, 0xe0, 0xe3, 0xe5, 0xe6, 0xe9, 0xea, 0xec, 0xef, 0xf1, 0xf2, 0xf4, 0xf7, 0xf8, 0xfb, 0xfd, 0xfe, }; /* * convert a 7 byte key to an 8 byte one */ void des56to64(uchar *k56, uchar *k64) { u32int hi, lo; hi = ((u32int)k56[0]<<24)|((u32int)k56[1]<<16)|((u32int)k56[2]<<8)|k56[3]; lo = ((u32int)k56[4]<<24)|((u32int)k56[5]<<16)|((u32int)k56[6]<<8); k64[0] = parity[(hi>>25)&0x7f]; k64[1] = parity[(hi>>18)&0x7f]; k64[2] = parity[(hi>>11)&0x7f]; k64[3] = parity[(hi>>4)&0x7f]; k64[4] = parity[((hi<<3)|(lo>>29))&0x7f]; k64[5] = parity[(lo>>22)&0x7f]; k64[6] = parity[(lo>>15)&0x7f]; k64[7] = parity[(lo>>8)&0x7f]; } /* * convert an 8 byte key to a 7 byte one */ void des64to56(uchar *k64, uchar *k56) { u32int hi, lo; hi = (((u32int)k64[0]&0xfe)<<24)|(((u32int)k64[1]&0xfe)<<17)|(((u32int)k64[2]&0xfe)<<10) |((k64[3]&0xfe)<<3)|(k64[4]>>4); lo = (((u32int)k64[4]&0xfe)<<28)|(((u32int)k64[5]&0xfe)<<21)|(((u32int)k64[6]&0xfe)<<14) |(((u32int)k64[7]&0xfe)<<7); k56[0] = hi>>24; k56[1] = hi>>16; k56[2] = hi>>8; k56[3] = hi>>0; k56[4] = lo>>24; k56[5] = lo>>16; k56[6] = lo>>8; } void key_setup(uchar key[7], ulong *ek) { uchar k64[8]; des56to64(key, k64); des_key_setup(k64, ek); }