cryb.to/cryb-to
1
0
Fork 0
mirror of https://github.com/cryb-to/cryb-to.git synced 2024-11-30 09:35:43 +00:00
Code Issues Projects Releases Packages Wiki Activity
cryb-to/lib/rsaref/desc.c
Dag-Erling Smørgrav ae99587ba4 initial code drop
2014-07-04 11:18:53 +00:00

645 lines
21 KiB
C
Raw Blame History

/* DESC.C - Data Encryption Standard routines for RSAREF
Based on "Karn/Hoey/Outerbridge" implementation (KHODES)
*/
#include "global.h"
#include "rsaref.h"
#include "des.h"
static UINT2 BYTE_BIT[8] = {
0200, 0100, 040, 020, 010, 04, 02, 01
};
static UINT4 BIG_BYTE[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
};
static 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 unsigned char TOTAL_ROTATIONS[16] = {
1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28
};
static 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 UINT4 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 UINT4 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 UINT4 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 UINT4 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 UINT4 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 UINT4 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 UINT4 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 UINT4 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 Unpack PROTO_LIST ((unsigned char *, UINT4 *));
static void Pack PROTO_LIST ((UINT4 *, unsigned char *));
static void DESKey PROTO_LIST ((UINT4 *, unsigned char *, int));
static void CookKey PROTO_LIST ((UINT4 *, UINT4 *, int));
static void DESFunction PROTO_LIST ((UINT4 *, UINT4 *));
/* Initialize context. Caller must zeroize the context when finished.
*/
void DES_CBCInit (context, key, iv, encrypt)
DES_CBC_CTX *context; /* context */
unsigned char key[8]; /* key */
unsigned char iv[8]; /* initializing vector */
int encrypt; /* encrypt flag (1 = encrypt, 0 = decrypt) */
{
/* Copy encrypt flag to context.
*/
context->encrypt = encrypt;
/* Pack initializing vector into context.
*/
Pack (context->iv, iv);
/* Save the IV for use in Restart */
context->originalIV[0] = context->iv[0];
context->originalIV[1] = context->iv[1];
/* Precompute key schedule
*/
DESKey (context->subkeys, key, encrypt);
}
/* DES-CBC block update operation. Continues a DES-CBC encryption
operation, processing eight-byte message blocks, and updating
the context.
*/
int DES_CBCUpdate (context, output, input, len)
DES_CBC_CTX *context; /* context */
unsigned char *output; /* output block */
unsigned char *input; /* input block */
unsigned int len; /* length of input and output blocks */
{
UINT4 inputBlock[2], work[2];
unsigned int i;
if (len % 8)
return (RE_LEN);
for (i = 0; i < len/8; i++) {
Pack (inputBlock, &input[8*i]);
/* Chain if encrypting.
*/
if (context->encrypt) {
work[0] = inputBlock[0] ^ context->iv[0];
work[1] = inputBlock[1] ^ context->iv[1];
}
else {
work[0] = inputBlock[0];
work[1] = inputBlock[1];
}
DESFunction (work, context->subkeys);
/* Chain if decrypting, then update IV.
*/
if (context->encrypt) {
context->iv[0] = work[0];
context->iv[1] = work[1];
}
else {
work[0] ^= context->iv[0];
work[1] ^= context->iv[1];
context->iv[0] = inputBlock[0];
context->iv[1] = inputBlock[1];
}
Unpack (&output[8*i], work);
}
/* Zeroize sensitive information.
*/
R_memset ((POINTER)inputBlock, 0, sizeof (inputBlock));
R_memset ((POINTER)work, 0, sizeof (work));
return (0);
}
void DES_CBCRestart (context)
DES_CBC_CTX *context;
{
/* Reset to the original IV */
context->iv[0] = context->originalIV[0];
context->iv[1] = context->originalIV[1];
}
/* Initialize context. Caller must zeroize the context when finished.
The key has the DES key, input whitener and output whitener concatenated.
*/
void DESX_CBCInit (context, key, iv, encrypt)
DESX_CBC_CTX *context;
unsigned char key[24]; /* DES key and whiteners */
unsigned char iv[8]; /* DES initializing vector */
int encrypt; /* encrypt flag (1 = encrypt, 0 = decrypt) */
{
/* Copy encrypt flag to context.
*/
context->encrypt = encrypt;
/* Pack initializing vector and whiteners into context.
*/
Pack (context->iv, iv);
Pack (context->inputWhitener, key + 8);
Pack (context->outputWhitener, key + 16);
/* Save the IV for use in Restart */
context->originalIV[0] = context->iv[0];
context->originalIV[1] = context->iv[1];
/* Precompute key schedule.
*/
DESKey (context->subkeys, key, encrypt);
}
/* DESX-CBC block update operation. Continues a DESX-CBC encryption
operation, processing eight-byte message blocks, and updating
the context.
*/
int DESX_CBCUpdate (context, output, input, len)
DESX_CBC_CTX *context; /* context */
unsigned char *output; /* output block */
unsigned char *input; /* input block */
unsigned int len; /* length of input and output blocks */
{
UINT4 inputBlock[2], work[2];
unsigned int i;
if (len % 8)
return (RE_LEN);
for (i = 0; i < len/8; i++) {
Pack (inputBlock, &input[8*i]);
/* Chain if encrypting, and xor with whitener.
*/
if (context->encrypt) {
work[0] =
inputBlock[0] ^ context->iv[0] ^ context->inputWhitener[0];
work[1] =
inputBlock[1] ^ context->iv[1] ^ context->inputWhitener[1];
}
else {
work[0] = inputBlock[0] ^ context->outputWhitener[0];
work[1] = inputBlock[1] ^ context->outputWhitener[1];
}
DESFunction (work, context->subkeys);
/* Xor with whitener, chain if decrypting, then update IV.
*/
if (context->encrypt) {
work[0] ^= context->outputWhitener[0];
work[1] ^= context->outputWhitener[1];
context->iv[0] = work[0];
context->iv[1] = work[1];
}
else {
work[0] ^= context->iv[0] ^ context->inputWhitener[0];
work[1] ^= context->iv[1] ^ context->inputWhitener[1];
context->iv[0] = inputBlock[0];
context->iv[1] = inputBlock[1];
}
Unpack (&output[8*i], work);
}
/* Zeroize sensitive information.
*/
R_memset ((POINTER)inputBlock, 0, sizeof (inputBlock));
R_memset ((POINTER)work, 0, sizeof (work));
return (0);
}
void DESX_CBCRestart (context)
DESX_CBC_CTX *context;
{
/* Reset to the original IV */
context->iv[0] = context->originalIV[0];
context->iv[1] = context->originalIV[1];
}
/* Initialize context. Caller must zeroize the context when finished.
*/
void DES3_CBCInit(context, key, iv, encrypt)
DES3_CBC_CTX *context; /* context */
unsigned char key[24]; /* key */
unsigned char iv[8]; /* initializing vector */
int encrypt; /* encrypt flag (1 = encrypt, 0 = decrypt) */
{
/* Copy encrypt flag to context.
*/
context->encrypt = encrypt;
/* Pack initializing vector into context.
*/
Pack (context->iv, iv);
/* Save the IV for use in Restart */
context->originalIV[0] = context->iv[0];
context->originalIV[1] = context->iv[1];
/* Precompute key schedules.
*/
DESKey (context->subkeys[0], encrypt ? key : &key[16], encrypt);
DESKey (context->subkeys[1], &key[8], !encrypt);
DESKey (context->subkeys[2], encrypt ? &key[16] : key, encrypt);
}
int DES3_CBCUpdate (context, output, input, len)
DES3_CBC_CTX *context; /* context */
unsigned char *output; /* output block */
unsigned char *input; /* input block */
unsigned int len; /* length of input and output blocks */
{
UINT4 inputBlock[2], work[2];
unsigned int i;
if (len % 8)
return (RE_LEN);
for (i = 0; i < len/8; i++) {
Pack (inputBlock, &input[8*i]);
/* Chain if encrypting.
*/
if (context->encrypt) {
work[0] = inputBlock[0] ^ context->iv[0];
work[1] = inputBlock[1] ^ context->iv[1];
}
else {
work[0] = inputBlock[0];
work[1] = inputBlock[1];
}
DESFunction (work, context->subkeys[0]);
DESFunction (work, context->subkeys[1]);
DESFunction (work, context->subkeys[2]);
/* Chain if decrypting, then update IV.
*/
if (context->encrypt) {
context->iv[0] = work[0];
context->iv[1] = work[1];
}
else {
work[0] ^= context->iv[0];
work[1] ^= context->iv[1];
context->iv[0] = inputBlock[0];
context->iv[1] = inputBlock[1];
}
Unpack (&output[8*i], work);
}
/* Zeroize sensitive information.
*/
R_memset ((POINTER)inputBlock, 0, sizeof (inputBlock));
R_memset ((POINTER)work, 0, sizeof (work));
return (0);
}
void DES3_CBCRestart (context)
DES3_CBC_CTX *context;
{
/* Reset to the original IV */
context->iv[0] = context->originalIV[0];
context->iv[1] = context->originalIV[1];
}
static void Pack (into, outof)
UINT4 *into;
unsigned char *outof;
{
*into = (*outof++ & 0xffL) << 24;
*into |= (*outof++ & 0xffL) << 16;
*into |= (*outof++ & 0xffL) << 8;
*into++ |= (*outof++ & 0xffL);
*into = (*outof++ & 0xffL) << 24;
*into |= (*outof++ & 0xffL) << 16;
*into |= (*outof++ & 0xffL) << 8;
*into |= (*outof & 0xffL);
}
static void Unpack (into, outof)
unsigned char *into;
UINT4 *outof;
{
*into++ = (unsigned char)((*outof >> 24) & 0xffL);
*into++ = (unsigned char)((*outof >> 16) & 0xffL);
*into++ = (unsigned char)((*outof >> 8) & 0xffL);
*into++ = (unsigned char)( *outof++ & 0xffL);
*into++ = (unsigned char)((*outof >> 24) & 0xffL);
*into++ = (unsigned char)((*outof >> 16) & 0xffL);
*into++ = (unsigned char)((*outof >> 8) & 0xffL);
*into = (unsigned char)( *outof & 0xffL);
}
static void DESKey (subkeys, key, encrypt)
UINT4 subkeys[32];
unsigned char key[8];
int encrypt;
{
UINT4 kn[32];
int i, j, l, m, n;
unsigned char pc1m[56], pcr[56];
for (j = 0; j < 56; j++) {
l = PC1[j];
m = l & 07;
pc1m[j] = (unsigned char)((key[l >> 3] & BYTE_BIT[m]) ? 1 : 0);
}
for (i = 0; i < 16; i++) {
m = i << 1;
n = m + 1;
kn[m] = kn[n] = 0L;
for (j = 0; j < 28; j++) {
l = j + TOTAL_ROTATIONS[i];
if (l < 28)
pcr[j] = pc1m[l];
else
pcr[j] = pc1m[l - 28];
}
for (j = 28; j < 56; j++) {
l = j + TOTAL_ROTATIONS[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] |= BIG_BYTE[j];
if (pcr[PC2[j+24]])
kn[n] |= BIG_BYTE[j];
}
}
CookKey (subkeys, kn, encrypt);
/* Zeroize sensitive information.
*/
R_memset ((POINTER)pc1m, 0, sizeof (pc1m));
R_memset ((POINTER)pcr, 0, sizeof (pcr));
R_memset ((POINTER)kn, 0, sizeof (kn));
}
static void CookKey (subkeys, kn, encrypt)
UINT4 *subkeys;
UINT4 *kn;
int encrypt;
{
UINT4 *cooked, *raw0, *raw1;
int increment;
unsigned int i;
raw1 = kn;
cooked = encrypt ? subkeys : &subkeys[30];
increment = encrypt ? 1 : -3;
for (i = 0; i < 16; i++, raw1++) {
raw0 = raw1++;
*cooked = (*raw0 & 0x00fc0000L) << 6;
*cooked |= (*raw0 & 0x00000fc0L) << 10;
*cooked |= (*raw1 & 0x00fc0000L) >> 10;
*cooked++ |= (*raw1 & 0x00000fc0L) >> 6;
*cooked = (*raw0 & 0x0003f000L) << 12;
*cooked |= (*raw0 & 0x0000003fL) << 16;
*cooked |= (*raw1 & 0x0003f000L) >> 4;
*cooked |= (*raw1 & 0x0000003fL);
cooked += increment;
}
}
static void DESFunction (block, subkeys)
UINT4 *block;
UINT4 *subkeys;
{
register UINT4 fval, work, right, left;
register int round;
left = block[0];
right = block[1];
work = ((left >> 4) ^ right) & 0x0f0f0f0fL;
right ^= work;
left ^= (work << 4);
work = ((left >> 16) ^ right) & 0x0000ffffL;
right ^= work;
left ^= (work << 16);
work = ((right >> 2) ^ left) & 0x33333333L;
left ^= work;
right ^= (work << 2);
work = ((right >> 8) ^ left) & 0x00ff00ffL;
left ^= work;
right ^= (work << 8);
right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL;
work = (left ^ right) & 0xaaaaaaaaL;
left ^= work;
right ^= work;
left = ((left << 1) | ((left >> 31) & 1L)) & 0xffffffffL;
for (round = 0; round < 8; round++) {
work = (right << 28) | (right >> 4);
work ^= *subkeys++;
fval = SP7[ work & 0x3fL];
fval |= SP5[(work >> 8) & 0x3fL];
fval |= SP3[(work >> 16) & 0x3fL];
fval |= SP1[(work >> 24) & 0x3fL];
work = right ^ *subkeys++;
fval |= SP8[ work & 0x3fL];
fval |= SP6[(work >> 8) & 0x3fL];
fval |= SP4[(work >> 16) & 0x3fL];
fval |= SP2[(work >> 24) & 0x3fL];
left ^= fval;
work = (left << 28) | (left >> 4);
work ^= *subkeys++;
fval = SP7[ work & 0x3fL];
fval |= SP5[(work >> 8) & 0x3fL];
fval |= SP3[(work >> 16) & 0x3fL];
fval |= SP1[(work >> 24) & 0x3fL];
work = left ^ *subkeys++;
fval |= SP8[ work & 0x3fL];
fval |= SP6[(work >> 8) & 0x3fL];
fval |= SP4[(work >> 16) & 0x3fL];
fval |= SP2[(work >> 24) & 0x3fL];
right ^= fval;
}
right = (right << 31) | (right >> 1);
work = (left ^ right) & 0xaaaaaaaaL;
left ^= work;
right ^= work;
left = (left << 31) | (left >> 1);
work = ((left >> 8) ^ right) & 0x00ff00ffL;
right ^= work;
left ^= (work << 8);
work = ((left >> 2) ^ right) & 0x33333333L;
right ^= work;
left ^= (work << 2);
work = ((right >> 16) ^ left) & 0x0000ffffL;
left ^= work;
right ^= (work << 16);
work = ((right >> 4) ^ left) & 0x0f0f0f0fL;
left ^= work;
right ^= (work << 4);
*block++ = right;
*block = left;
}
Reference in a new issue View git blame Copy permalink