des.c

NIST推荐的素域上的椭圆曲线

/* DES code submitted by Dobes Vandermeer */
#include "mycrypt.h"

#ifdef DES

#define EN0 0 
#define DE1 1

const struct _cipher_descriptor des_desc =
{
    "des",
    13,
    8, 8, 8, 16,
    &des_setup,
    &des_ecb_encrypt,
    &des_ecb_decrypt,
    &des_test,
    &des_keysize
};

const struct _cipher_descriptor des3_desc =
{
    "3des",
    14,
    24, 24, 8, 16,
    &des3_setup,
    &des3_ecb_encrypt,
    &des3_ecb_decrypt,
    &des3_test,
    &des3_keysize
};

static const unsigned char Df_Key[24] =
{
    0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
    0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
    0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67 
};

static const unsigned short bytebit[8] =
{
    0200, 0100, 040, 020, 010, 04, 02, 01 
};

static const unsigned long bigbyte[24] =
{
    0x800000L,  0x400000L,  0x200000L,  0x100000L,
    0x80000L,   0x40000L,   0x20000L,   0x10000L,
    0x8000L,    0x4000L,    0x2000L,    0x1000L,
    0x800L,     0x400L,     0x200L,     0x100L,
    0x80L,      0x40L,      0x20L,      0x10L,
    0x8L,       0x4L,       0x2L,       0x1L 
};

/* Use the key schedule specific in the standard (ANSI X3.92-1981) */

static const unsigned char 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 unsigned char totrot[16] = {
    1,   2,  4,  6,
    8,  10, 12, 14, 
    15, 17, 19, 21, 
    23, 25, 27, 28
};

static const unsigned char 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 unsigned long SP1[64] =
{
    0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,
    0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,
    0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,
    0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,
    0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,
    0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,
    0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,
    0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,
    0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,
    0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,
    0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,
    0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,
    0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,
    0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,
    0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,
    0x00010004L, 0x00010400L, 0x00000000L, 0x01010004
};

static const unsigned long SP2[64] =
{
    0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,
    0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,
    0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,
    0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,
    0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,
    0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,
    0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,
    0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,
    0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,
    0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,
    0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,
    0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,
    0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,
    0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,
    0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,
    0x80000000L, 0x80100020L, 0x80108020L, 0x00108000
};

static const unsigned long SP3[64] =
{
    0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,
    0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,
    0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,
    0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,
    0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,
    0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,
    0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,
    0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,
    0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,
    0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,
    0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,
    0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,
    0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,
    0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,
    0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,
    0x00020208L, 0x00000008L, 0x08020008L, 0x00020200
};

static const unsigned long SP4[64] =
{
    0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
    0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,
    0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,
    0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,
    0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,
    0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,
    0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,
    0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,
    0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,
    0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,
    0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,
    0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
    0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,
    0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,
    0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,
    0x00000080L, 0x00800000L, 0x00002000L, 0x00802080
};

static const unsigned long SP5[64] =
{
    0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,
    0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,
    0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,
    0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,
    0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,
    0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,
    0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,
    0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,
    0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,
    0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,
    0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,
    0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,
    0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,
    0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,
    0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,
    0x00000000L, 0x40080000L, 0x02080100L, 0x40000100
};

static const unsigned long SP6[64] =
{
    0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,
    0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L,
    0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L,
    0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L,
    0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L,
    0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L,
    0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L,
    0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L,
    0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L,
    0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L,
    0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L,
    0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L,
    0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L,
    0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L,
    0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L,
    0x20404000L, 0x20000000L, 0x00400010L, 0x20004010
};

static const unsigned long SP7[64] =
{
    0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,
    0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,
    0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,
    0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,
    0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,
    0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,
    0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,
    0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,
    0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,
    0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,
    0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,
    0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,
    0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,
    0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,
    0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,
    0x04000002L, 0x04000800L, 0x00000800L, 0x00200002
};

static const unsigned long SP8[64] =
{
    0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,
    0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,
    0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,
    0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,
    0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,
    0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,
    0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,
    0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,
    0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,
    0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,
    0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,
    0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,
    0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,
    0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,
    0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,
    0x00001040L, 0x00040040L, 0x10000000L, 0x10041000
};


static void cookey(const unsigned long *raw1, unsigned long *keyout);

#ifdef CLEAN_STACK
void _deskey(const unsigned char *key, short edf, unsigned long *keyout)
#else
void deskey(const unsigned char *key, short edf, unsigned long *keyout)
#endif
{
    int i, j, l, m, n;
    unsigned char pc1m[56], pcr[56];
    unsigned long kn[32];

    for(j=0; j < 56; j++)
    {
        l = pc1[j];
        m = l & 07;
        pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0;
    }

    for(i=0; i < 16; i++)
    {
        if(edf == DE1) m = (15 - i) << 1;
        else m = i << 1;
        n = m + 1;
        kn[m] = kn[n] = 0L;
        for(j=0; j < 28; j++) 
        {
            l = j + totrot[i];
            if(l < 28) pcr[j] = pc1m[l];
            else pcr[j] = pc1m[l - 28];
        }
        for(/*j = 28*/; j < 56; j++)
        {
            l = j + totrot[i];
            if(l < 56) pcr[j] = pc1m[l];
            else pcr[j] = pc1m[l - 28];
        }
        for(j=0; j < 24; j++)
        {
            if(pcr[pc2[j]]) kn[m] |= bigbyte[j];
            if(pcr[pc2[j+24]]) kn[n] |= bigbyte[j];
        }
    }

    cookey(kn, keyout);
}

#ifdef CLEAN_STACK
void deskey(const unsigned char *key, short edf, unsigned long *keyout)
{
   _deskey(key, edf, keyout);
   burn_stack(sizeof(int)*5 + sizeof(unsigned long)*32 + sizeof(unsigned char)*112);
}
#endif

#ifdef CLEAN_STACK
static void _cookey(const unsigned long *raw1, unsigned long *keyout)
#else
static void cookey(const unsigned long *raw1, unsigned long *keyout)
#endif
{
    unsigned long *cook;
    const unsigned long *raw0;
    unsigned long 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);
    }

    memcpy(keyout, dough, sizeof dough);
}

#ifdef CLEAN_STACK
static void cookey(const unsigned long *raw1, unsigned long *keyout)
{
   _cookey(raw1, keyout);
   burn_stack(sizeof(unsigned long *) * 2 + sizeof(unsigned long)*32 + sizeof(int));
}
#endif

#ifndef CLEAN_STACK
static void desfunc(unsigned long *block, const unsigned long *keys)
#else
static void _desfunc(unsigned long *block, const unsigned long *keys)
#endif
{
    unsigned long fval, work, right, leftt;
    int 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 = ((right << 1) | ((right >> 31) & 1L)) & 0xFFFFFFFFL;
    work = (leftt ^ right) & 0xaaaaaaaaL;
    
    leftt ^= work;
    right ^= work;
    leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL;