text: /*
   * DES and 3DES-EDE ciphers
   *
   * Modifications to LibTomCrypt implementation:
   * Copyright (c) 2006-2009, Jouni Malinen <j@w1.fi>
   *
   * This software may be distributed under the terms of the BSD license.
   * See README for more details.
   */
  
  
  #include "utils/includes.h"
  
  #include "utils/common.h"
  #include "crypto.h"
  //#include "des_i.h"
  
  /*
   * This implementation is based on a DES implementation included in
   * LibTomCrypt. The version here is modified to fit in wpa_supplicant/hostapd
   * coding style.
   */
  
  /* LibTomCrypt, modular cryptographic library -- Tom St Denis
   *
   * LibTomCrypt is a library that provides various cryptographic
   * algorithms in a highly modular and flexible manner.
   *
   * The library is free for all purposes without any express
   * guarantee it works.
   *
   * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
   */
  
  /**
    DES code submitted by Dobes Vandermeer
  */
  
  #define ROLc(x, y) \
  	((((unsigned long) (x) << (unsigned long) ((y) & 31)) | \
  	  (((unsigned long) (x) & 0xFFFFFFFFUL) >> \
  	   (unsigned long) (32 - ((y) & 31)))) & 0xFFFFFFFFUL)
  #define RORc(x, y) \
  	(((((unsigned long) (x) & 0xFFFFFFFFUL) >> \
  	   (unsigned long) ((y) & 31)) | \
  	  ((unsigned long) (x) << (unsigned long) (32 - ((y) & 31)))) & \
  	 0xFFFFFFFFUL)
  
  
  static const u32 bytebit[8] =
  {
  	0200, 0100, 040, 020, 010, 04, 02, 01 
  };
  
  static const u32 bigbyte[24] =
  {
  	0x800000UL,  0x400000UL,  0x200000UL,  0x100000UL,
  	0x80000UL,   0x40000UL,   0x20000UL,   0x10000UL,
  	0x8000UL,    0x4000UL,    0x2000UL,    0x1000UL,
  	0x800UL,     0x400UL,     0x200UL,     0x100UL,
  	0x80UL,      0x40UL,      0x20UL,      0x10UL,
  	0x8UL,       0x4UL,       0x2UL,       0x1L 
  };
  
  /* Use the key schedule specific in the standard (ANSI X3.92-1981) */
  
  static const u8 pc1[56] = {
  	56, 48, 40, 32, 24, 16,  8,  0, 57, 49, 41, 33, 25, 17,  
  	 9,  1, 58, 50, 42, 34, 26, 18, 10,  2, 59, 51, 43, 35, 
  	62, 54, 46, 38, 30, 22, 14,  6, 61, 53, 45, 37, 29, 21,
  	13,  5, 60, 52, 44, 36, 28, 20, 12,  4, 27, 19, 11,  3 
  };
  
  static const u8 totrot[16] = {
  	1,   2,  4,  6,
  	8,  10, 12, 14, 
  	15, 17, 19, 21, 
  	23, 25, 27, 28
  };
  
  static const u8 pc2[48] = {
  	13, 16, 10, 23,  0,  4,      2, 27, 14,  5, 20,  9,
  	22, 18, 11,  3, 25,  7,     15,  6, 26, 19, 12,  1,
  	40, 51, 30, 36, 46, 54,     29, 39, 50, 44, 32, 47,
  	43, 48, 38, 55, 33, 52,     45, 41, 49, 35, 28, 31
  };
  
  
  static const u32 SP1[64] =
  {
  	0x01010400UL, 0x00000000UL, 0x00010000UL, 0x01010404UL,
  	0x01010004UL, 0x00010404UL, 0x00000004UL, 0x00010000UL,
  	0x00000400UL, 0x01010400UL, 0x01010404UL, 0x00000400UL,
  	0x01000404UL, 0x01010004UL, 0x01000000UL, 0x00000004UL,
  	0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00010400UL,
  	0x00010400UL, 0x01010000UL, 0x01010000UL, 0x01000404UL,
  	0x00010004UL, 0x01000004UL, 0x01000004UL, 0x00010004UL,
  	0x00000000UL, 0x00000404UL, 0x00010404UL, 0x01000000UL,
  	0x00010000UL, 0x01010404UL, 0x00000004UL, 0x01010000UL,
  	0x01010400UL, 0x01000000UL, 0x01000000UL, 0x00000400UL,
  	0x01010004UL, 0x00010000UL, 0x00010400UL, 0x01000004UL,
  	0x00000400UL, 0x00000004UL, 0x01000404UL, 0x00010404UL,
  	0x01010404UL, 0x00010004UL, 0x01010000UL, 0x01000404UL,
  	0x01000004UL, 0x00000404UL, 0x00010404UL, 0x01010400UL,
  	0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00000000UL,
  	0x00010004UL, 0x00010400UL, 0x00000000UL, 0x01010004UL
  };
  
  static const u32 SP2[64] =
  {
  	0x80108020UL, 0x80008000UL, 0x00008000UL, 0x00108020UL,
  	0x00100000UL, 0x00000020UL, 0x80100020UL, 0x80008020UL,
  	0x80000020UL, 0x80108020UL, 0x80108000UL, 0x80000000UL,
  	0x80008000UL, 0x00100000UL, 0x00000020UL, 0x80100020UL,
  	0x00108000UL, 0x00100020UL, 0x80008020UL, 0x00000000UL,
  	0x80000000UL, 0x00008000UL, 0x00108020UL, 0x80100000UL,
  	0x00100020UL, 0x80000020UL, 0x00000000UL, 0x00108000UL,
  	0x00008020UL, 0x80108000UL, 0x80100000UL, 0x00008020UL,
  	0x00000000UL, 0x00108020UL, 0x80100020UL, 0x00100000UL,
  	0x80008020UL, 0x80100000UL, 0x80108000UL, 0x00008000UL,
  	0x80100000UL, 0x80008000UL, 0x00000020UL, 0x80108020UL,
  	0x00108020UL, 0x00000020UL, 0x00008000UL, 0x80000000UL,
  	0x00008020UL, 0x80108000UL, 0x00100000UL, 0x80000020UL,
  	0x00100020UL, 0x80008020UL, 0x80000020UL, 0x00100020UL,
  	0x00108000UL, 0x00000000UL, 0x80008000UL, 0x00008020UL,
  	0x80000000UL, 0x80100020UL, 0x80108020UL, 0x00108000UL
  };
  
  static const u32 SP3[64] =
  {
  	0x00000208UL, 0x08020200UL, 0x00000000UL, 0x08020008UL,
  	0x08000200UL, 0x00000000UL, 0x00020208UL, 0x08000200UL,
  	0x00020008UL, 0x08000008UL, 0x08000008UL, 0x00020000UL,
  	0x08020208UL, 0x00020008UL, 0x08020000UL, 0x00000208UL,
  	0x08000000UL, 0x00000008UL, 0x08020200UL, 0x00000200UL,
  	0x00020200UL, 0x08020000UL, 0x08020008UL, 0x00020208UL,
  	0x08000208UL, 0x00020200UL, 0x00020000UL, 0x08000208UL,
  	0x00000008UL, 0x08020208UL, 0x00000200UL, 0x08000000UL,
  	0x08020200UL, 0x08000000UL, 0x00020008UL, 0x00000208UL,
  	0x00020000UL, 0x08020200UL, 0x08000200UL, 0x00000000UL,
  	0x00000200UL, 0x00020008UL, 0x08020208UL, 0x08000200UL,
  	0x08000008UL, 0x00000200UL, 0x00000000UL, 0x08020008UL,
  	0x08000208UL, 0x00020000UL, 0x08000000UL, 0x08020208UL,
  	0x00000008UL, 0x00020208UL, 0x00020200UL, 0x08000008UL,
  	0x08020000UL, 0x08000208UL, 0x00000208UL, 0x08020000UL,
  	0x00020208UL, 0x00000008UL, 0x08020008UL, 0x00020200UL
  };
  
  static const u32 SP4[64] =
  {
  	0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
  	0x00802080UL, 0x00800081UL, 0x00800001UL, 0x00002001UL,
  	0x00000000UL, 0x00802000UL, 0x00802000UL, 0x00802081UL,
  	0x00000081UL, 0x00000000UL, 0x00800080UL, 0x00800001UL,
  	0x00000001UL, 0x00002000UL, 0x00800000UL, 0x00802001UL,
  	0x00000080UL, 0x00800000UL, 0x00002001UL, 0x00002080UL,
  	0x00800081UL, 0x00000001UL, 0x00002080UL, 0x00800080UL,
  	0x00002000UL, 0x00802080UL, 0x00802081UL, 0x00000081UL,
  	0x00800080UL, 0x00800001UL, 0x00802000UL, 0x00802081UL,
  	0x00000081UL, 0x00000000UL, 0x00000000UL, 0x00802000UL,
  	0x00002080UL, 0x00800080UL, 0x00800081UL, 0x00000001UL,
  	0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
  	0x00802081UL, 0x00000081UL, 0x00000001UL, 0x00002000UL,
  	0x00800001UL, 0x00002001UL, 0x00802080UL, 0x00800081UL,
  	0x00002001UL, 0x00002080UL, 0x00800000UL, 0x00802001UL,
  	0x00000080UL, 0x00800000UL, 0x00002000UL, 0x00802080UL
  };
  
  static const u32 SP5[64] =
  {
  	0x00000100UL, 0x02080100UL, 0x02080000UL, 0x42000100UL,
  	0x00080000UL, 0x00000100UL, 0x40000000UL, 0x02080000UL,
  	0x40080100UL, 0x00080000UL, 0x02000100UL, 0x40080100UL,
  	0x42000100UL, 0x42080000UL, 0x00080100UL, 0x40000000UL,
  	0x02000000UL, 0x40080000UL, 0x40080000UL, 0x00000000UL,
  	0x40000100UL, 0x42080100UL, 0x42080100UL, 0x02000100UL,
  	0x42080000UL, 0x40000100UL, 0x00000000UL, 0x42000000UL,
  	0x02080100UL, 0x02000000UL, 0x42000000UL, 0x00080100UL,
  	0x00080000UL, 0x42000100UL, 0x00000100UL, 0x02000000UL,
  	0x40000000UL, 0x02080000UL, 0x42000100UL, 0x40080100UL,
  	0x02000100UL, 0x40000000UL, 0x42080000UL, 0x02080100UL,
  	0x40080100UL, 0x00000100UL, 0x02000000UL, 0x42080000UL,
  	0x42080100UL, 0x00080100UL, 0x42000000UL, 0x42080100UL,
  	0x02080000UL, 0x00000000UL, 0x40080000UL, 0x42000000UL,
  	0x00080100UL, 0x02000100UL, 0x40000100UL, 0x00080000UL,
  	0x00000000UL, 0x40080000UL, 0x02080100UL, 0x40000100UL
  };
  
  static const u32 SP6[64] =
  {
  	0x20000010UL, 0x20400000UL, 0x00004000UL, 0x20404010UL,
  	0x20400000UL, 0x00000010UL, 0x20404010UL, 0x00400000UL,
  	0x20004000UL, 0x00404010UL, 0x00400000UL, 0x20000010UL,
  	0x00400010UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
  	0x00000000UL, 0x00400010UL, 0x20004010UL, 0x00004000UL,
  	0x00404000UL, 0x20004010UL, 0x00000010UL, 0x20400010UL,
  	0x20400010UL, 0x00000000UL, 0x00404010UL, 0x20404000UL,
  	0x00004010UL, 0x00404000UL, 0x20404000UL, 0x20000000UL,
  	0x20004000UL, 0x00000010UL, 0x20400010UL, 0x00404000UL,
  	0x20404010UL, 0x00400000UL, 0x00004010UL, 0x20000010UL,
  	0x00400000UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
  	0x20000010UL, 0x20404010UL, 0x00404000UL, 0x20400000UL,
  	0x00404010UL, 0x20404000UL, 0x00000000UL, 0x20400010UL,
  	0x00000010UL, 0x00004000UL, 0x20400000UL, 0x00404010UL,
  	0x00004000UL, 0x00400010UL, 0x20004010UL, 0x00000000UL,
  	0x20404000UL, 0x20000000UL, 0x00400010UL, 0x20004010UL
  };
  
  static const u32 SP7[64] =
  {
  	0x00200000UL, 0x04200002UL, 0x04000802UL, 0x00000000UL,
  	0x00000800UL, 0x04000802UL, 0x00200802UL, 0x04200800UL,
  	0x04200802UL, 0x00200000UL, 0x00000000UL, 0x04000002UL,
  	0x00000002UL, 0x04000000UL, 0x04200002UL, 0x00000802UL,
  	0x04000800UL, 0x00200802UL, 0x00200002UL, 0x04000800UL,
  	0x04000002UL, 0x04200000UL, 0x04200800UL, 0x00200002UL,
  	0x04200000UL, 0x00000800UL, 0x00000802UL, 0x04200802UL,
  	0x00200800UL, 0x00000002UL, 0x04000000UL, 0x00200800UL,
  	0x04000000UL, 0x00200800UL, 0x00200000UL, 0x04000802UL,
  	0x04000802UL, 0x04200002UL, 0x04200002UL, 0x00000002UL,
  	0x00200002UL, 0x04000000UL, 0x04000800UL, 0x00200000UL,
  	0x04200800UL, 0x00000802UL, 0x00200802UL, 0x04200800UL,
  	0x00000802UL, 0x04000002UL, 0x04200802UL, 0x04200000UL,
  	0x00200800UL, 0x00000000UL, 0x00000002UL, 0x04200802UL,
  	0x00000000UL, 0x00200802UL, 0x04200000UL, 0x00000800UL,
  	0x04000002UL, 0x04000800UL, 0x00000800UL, 0x00200002UL
  };
  
  static const u32 SP8[64] =
  {
  	0x10001040UL, 0x00001000UL, 0x00040000UL, 0x10041040UL,
  	0x10000000UL, 0x10001040UL, 0x00000040UL, 0x10000000UL,
  	0x00040040UL, 0x10040000UL, 0x10041040UL, 0x00041000UL,
  	0x10041000UL, 0x00041040UL, 0x00001000UL, 0x00000040UL,
  	0x10040000UL, 0x10000040UL, 0x10001000UL, 0x00001040UL,
  	0x00041000UL, 0x00040040UL, 0x10040040UL, 0x10041000UL,
  	0x00001040UL, 0x00000000UL, 0x00000000UL, 0x10040040UL,
  	0x10000040UL, 0x10001000UL, 0x00041040UL, 0x00040000UL,
  	0x00041040UL, 0x00040000UL, 0x10041000UL, 0x00001000UL,
  	0x00000040UL, 0x10040040UL, 0x00001000UL, 0x00041040UL,
  	0x10001000UL, 0x00000040UL, 0x10000040UL, 0x10040000UL,
  	0x10040040UL, 0x10000000UL, 0x00040000UL, 0x10001040UL,
  	0x00000000UL, 0x10041040UL, 0x00040040UL, 0x10000040UL,
  	0x10040000UL, 0x10001000UL, 0x10001040UL, 0x00000000UL,
  	0x10041040UL, 0x00041000UL, 0x00041000UL, 0x00001040UL,
  	0x00001040UL, 0x00040040UL, 0x10000000UL, 0x10041000UL
  };
  
  static void cookey(const u32 *raw1, u32 *keyout)
  {
  	u32 *cook;
  	const u32 *raw0;
  	u32 dough[32];
  	int i;
  
  	cook = dough;
  	for (i = 0; i < 16; i++, raw1++) {
  		raw0 = raw1++;
  		*cook    = (*raw0 & 0x00fc0000L) << 6;
  		*cook   |= (*raw0 & 0x00000fc0L) << 10;
  		*cook   |= (*raw1 & 0x00fc0000L) >> 10;
  		*cook++ |= (*raw1 & 0x00000fc0L) >> 6;
  		*cook    = (*raw0 & 0x0003f000L) << 12;
  		*cook   |= (*raw0 & 0x0000003fL) << 16;
  		*cook   |= (*raw1 & 0x0003f000L) >> 4;
  		*cook++ |= (*raw1 & 0x0000003fL);
  	}
  
  	os_memcpy(keyout, dough, sizeof(dough));
  }
  
  
  static void deskey(const u8 *key, int decrypt, u32 *keyout)
  {
  	u32 i, j, l, m, n, kn[32];
  	u8 pc1m[56], pcr[56];
  
  	for (j = 0; j < 56; j++) {
  		l = (u32) pc1[j];
  		m = l & 7;
  		pc1m[j] = (u8)
  			((key[l >> 3U] & bytebit[m]) == bytebit[m] ? 1 : 0);
  	}
  
  	for (i = 0; i < 16; i++) {
  		if (decrypt)
  			m = (15 - i) << 1;
  		else
  			m = i << 1;
  		n = m + 1;
  		kn[m] = kn[n] = 0L;
  		for (j = 0; j < 28; j++) {
  			l = j + (u32) totrot[i];
  			if (l < 28)
  				pcr[j] = pc1m[l];
  			else
  				pcr[j] = pc1m[l - 28];
  		}
  		for (/* j = 28 */; j < 56; j++) {
  			l = j + (u32) totrot[i];
  			if (l < 56)
  				pcr[j] = pc1m[l];
  			else
  				pcr[j] = pc1m[l - 28];
  		}
  		for (j = 0; j < 24; j++) {
  			if ((int) pcr[(int) pc2[j]] != 0)
  				kn[m] |= bigbyte[j];
  			if ((int) pcr[(int) pc2[j + 24]] != 0)
  				kn[n] |= bigbyte[j];
  		}
  	}
  
  	cookey(kn, keyout);
  }
  
  
  static void desfunc(u32 *block, const u32 *keys)
  {
  	u32 work, right, leftt;
  	int cur_round;
  
  	leftt = block[0];
  	right = block[1];
  
  	work = ((leftt >> 4)  ^ right) & 0x0f0f0f0fL;
  	right ^= work;
  	leftt ^= (work << 4);
  
  	work = ((leftt >> 16) ^ right) & 0x0000ffffL;
  	right ^= work;
  	leftt ^= (work << 16);
  
  	work = ((right >> 2)  ^ leftt) & 0x33333333L;
  	leftt ^= work;
  	right ^= (work << 2);
  
  	work = ((right >> 8)  ^ leftt) & 0x00ff00ffL;
  	leftt ^= work;
  	right ^= (work << 8);
  
  	right = ROLc(right, 1);
  	work = (leftt ^ right) & 0xaaaaaaaaL;
  
  	leftt ^= work;
  	right ^= work;
  	leftt = ROLc(leftt, 1);
  
  	for (cur_round = 0; cur_round < 8; cur_round++) {
  		work  = RORc(right, 4) ^ *keys++;
  		leftt ^= SP7[work        & 0x3fL]
  			^ SP5[(work >>  8) & 0x3fL]
  			^ SP3[(work >> 16) & 0x3fL]
  			^ SP1[(work >> 24) & 0x3fL];
  		work  = right ^ *keys++;
  		leftt ^= SP8[ work        & 0x3fL]
  			^  SP6[(work >>  8) & 0x3fL]
  			^  SP4[(work >> 16) & 0x3fL]
  			^  SP2[(work >> 24) & 0x3fL];
  
  		work = RORc(leftt, 4) ^ *keys++;
  		right ^= SP7[ work        & 0x3fL]
  			^  SP5[(work >>  8) & 0x3fL]
  			^  SP3[(work >> 16) & 0x3fL]
  			^  SP1[(work >> 24) & 0x3fL];
  		work  = leftt ^ *keys++;
  		right ^= SP8[ work        & 0x3fL]
  			^  SP6[(work >>  8) & 0x3fL]
  			^  SP4[(work >> 16) & 0x3fL]
  			^  SP2[(work >> 24) & 0x3fL];
  	}
  
  	right = RORc(right, 1);
  	work = (leftt ^ right) & 0xaaaaaaaaL;
  	leftt ^= work;
  	right ^= work;
  	leftt = RORc(leftt, 1);
  	work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
  	right ^= work;
  	leftt ^= (work << 8);
  	/* -- */
  	work = ((leftt >> 2) ^ right) & 0x33333333L;
  	right ^= work;
  	leftt ^= (work << 2);
  	work = ((right >> 16) ^ leftt) & 0x0000ffffL;
  	leftt ^= work;
  	right ^= (work << 16);
  	work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
  	leftt ^= work;
  	right ^= (work << 4);
  
  	block[0] = right;
  	block[1] = leftt;
  }
  
  
  /* wpa_supplicant/hostapd specific wrapper */
  
  void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
  {
  	u8 pkey[8], next, tmp;
  	int i;
  	u32 ek[32], work[2];
  
  	/* Add parity bits to the key */
  	next = 0;
  	for (i = 0; i < 7; i++) {
  		tmp = key[i];
  		pkey[i] = (tmp >> i) | next | 1;
  		next = tmp << (7 - i);
  	}
  	pkey[i] = next | 1;
  
  	deskey(pkey, 0, ek);
  
  	work[0] = WPA_GET_BE32(clear);
  	work[1] = WPA_GET_BE32(clear + 4);
  	desfunc(work, ek);
  	WPA_PUT_BE32(cypher, work[0]);
  	WPA_PUT_BE32(cypher + 4, work[1]);
  
  	forced_memzero(pkey, sizeof(pkey));
  	forced_memzero(ek, sizeof(ek));
  }
  
  /*
  void des_key_setup(const u8 *key, u32 *ek, u32 *dk)
  {
  	deskey(key, 0, ek);
  	deskey(key, 1, dk);
  }
  
  
  void des_block_encrypt(const u8 *plain, const u32 *ek, u8 *crypt)
  {
  	u32 work[2];
  	work[0] = WPA_GET_BE32(plain);
  	work[1] = WPA_GET_BE32(plain + 4);
  	desfunc(work, ek);
  	WPA_PUT_BE32(crypt, work[0]);
  	WPA_PUT_BE32(crypt + 4, work[1]);
  }
  
  
  void des_block_decrypt(const u8 *crypt, const u32 *dk, u8 *plain)
  {
  	u32 work[2];
  	work[0] = WPA_GET_BE32(crypt);
  	work[1] = WPA_GET_BE32(crypt + 4);
  	desfunc(work, dk);
  	WPA_PUT_BE32(plain, work[0]);
  	WPA_PUT_BE32(plain + 4, work[1]);
  }
  
  
  void des3_key_setup(const u8 *key, struct des3_key_s *dkey)
  {
  	deskey(key, 0, dkey->ek[0]);
  	deskey(key + 8, 1, dkey->ek[1]);
  	deskey(key + 16, 0, dkey->ek[2]);
  
  	deskey(key, 1, dkey->dk[2]);
  	deskey(key + 8, 0, dkey->dk[1]);
  	deskey(key + 16, 1, dkey->dk[0]);
  }
  
  
  void des3_encrypt(const u8 *plain, const struct des3_key_s *key, u8 *crypt)
  {
  	u32 work[2];
  
  	work[0] = WPA_GET_BE32(plain);
  	work[1] = WPA_GET_BE32(plain + 4);
  	desfunc(work, key->ek[0]);
  	desfunc(work, key->ek[1]);
  	desfunc(work, key->ek[2]);
  	WPA_PUT_BE32(crypt, work[0]);
  	WPA_PUT_BE32(crypt + 4, work[1]);
  }
  
  
  void des3_decrypt(const u8 *crypt, const struct des3_key_s *key, u8 *plain)
  {
  	u32 work[2];
  
  	work[0] = WPA_GET_BE32(crypt);
  	work[1] = WPA_GET_BE32(crypt + 4);
  	desfunc(work, key->dk[0]);
  	desfunc(work, key->dk[1]);
  	desfunc(work, key->dk[2]);
  	WPA_PUT_BE32(plain, work[0]);
  	WPA_PUT_BE32(plain + 4, work[1]);
  }*/
  
  