static void cookey(raw1)

register unsigned long *raw1; {

register unsigned long *cook, *raw0;

unsigned long dough[32];

register int i;

cook = dough;

for( i = 0; i < 16; i++, raw1++ )

*cook = (*raw0 & 0x00fc0000L) << 6;

usekey(dough); return; }

void cpkey(into)

register unsigned long *into;

{

register unsigned long *from, *endp;

from = KnL, endp = &KnL[32]; while( from < endp ) *into++ = *from++; return; }

void usekey(from)

register unsigned long *from;

{

register unsigned long *to, *endp;

to = KnL, endp = &KnL[32];

while( to < endp ) *to++ = *from++; return; }

void des(inblock, outblock)

unsigned char *inblock, *outblock; {

unsigned long work[2];

scrunch(inblock, work);

desfunc(work, KnL);

unscrun(work, outblock); return; }

static void scrunch(outof, into)

register unsigned char *outof;

register unsigned long *into;

static void unscrun(outof, into)

register unsigned long *outof;

register unsigned char *into; {

*into++ = (*outof >> 24) & 0xffL;

*into++ = (*outof >> 16) & 0xffL;

*into++ = (*outof >> 8) & 0xffL;

*into++ = *outof++ & 0xffL;

*into++ = (*outof >> 24) & 0xffL;

*into++ = (*outof >> 16) & 0xffL;

*into++ = (*outof >> 8) & 0xffL;

*into = *outof & 0xffL;

return; }

static 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, 0x01010004L };

static 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, 0x00108000L };

static 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, 0x00020200L };

static 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, 0x00802080L };

static 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, 0x40000100L };

static 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, 0x20004010L };

static 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, 0x00200002L };

static 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, 0x10041000L };

static void desfunc(block, keys)

register unsigned long *block, *keys;

leftt ^= work;

/* Validation sets: *

* Single-length key, single-length plaintext -

* Key : 0123 4567 89ab cdef

* Plain : 0123 4567 89ab cde7

* Cipher : c957 4425 6a5e d31d

*/

void des_key(des_ctx *dc, unsigned char *key){

deskey(key,EN0);

cpkey(dc->ek);

deskey(key,DE1);

cpkey(dc->dk); }

/* Encrypt several blocks in ECB mode. Caller is responsible for

short blocks. */

void des_enc(des_ctx *dc, unsigned char *data, int blocks){

unsigned long work[2];

int i ;

unsigned char *cp;

cp = data;

for(i=0;i<blocks;i++){

scrunch (cp,work);

desfunc(work,dc->ek);

unscrun(work,cp);

cp+=8; } }

void des_dec(des_ctx *dc, unsigned char *data, int blocks)

{

unsigned long work[2];

int i ;

unsigned char *cp;

cp = data; for(i=0;i<blocks;i++){

scrunch (cp,work);

desfunc(work,dc->dk);

unscrun(work,cp);

cp+=8; } }

void main(void)

{

des_ctx dc;

int i ;

unsigned long data[10];

char *cp,key[8] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef};

char x[8] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xe7};

cp = x;

des_key(&dc,key);

des_enc(&dc,cp,1);

printf("Enc(0..7,0..7) = ");

for(i=0;i<8;i++)

printf("%02x ", ((unsigned int) cp[i])&0x00ff);

printf("\n");

des_dec(&dc,cp,1);

printf("Dec(above,0..7) = ");

for(i=0;i<8;i++)

printf("%02x ",((unsigned int)cp[i])&0x00ff);

printf("\n");

cp = (char *) data;

for(i=0;i<10;i++)data[i]=i;

des_enc(&dc,cp,5); /* Enc 5 blocks. */

for(i=0;i<10;i+=2)

printf("Block %01d = %081x %081x\n",i/2,data[i],data[i+1]);

des_dec(&dc,cp,1);

des_dec(&dc,cp+8,4);

for(i=0;i<10;i+=2)

printf("Block %01d = %081x %081x\n",i/2,data[i],data[i+1]);

getch();

}

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