About Us | Site Map | Privacy Policy | Contact Us | ©2005 POSABC.COM #ifndef _CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_NO_DEPRECATE 1
#endif
#include <string.h>
#include "des.h"
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i) \
{ \
(n) = ( (unsigned long) (b)[(i) ] << 24 ) \
| ( (unsigned long) (b)[(i) + 1] << 16 ) \
| ( (unsigned long) (b)[(i) + 2] << 8 ) \
| ( (unsigned long) (b)[(i) + 3] ); \
}
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i) \
{ \
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 3] = (unsigned char) ( (n) ); \
}
#endif
/*
* Expanded DES S-boxes
*/
static const unsigned long SB1[64] =
{
0x01010400, 0x00000000, 0x00010000, 0x01010404,
0x01010004, 0x00010404, 0x00000004, 0x00010000,
0x00000400, 0x01010400, 0x01010404, 0x00000400,
0x01000404, 0x01010004, 0x01000000, 0x00000004,
0x00000404, 0x01000400, 0x01000400, 0x00010400,
0x00010400, 0x01010000, 0x01010000, 0x01000404,
0x00010004, 0x01000004, 0x01000004, 0x00010004,
0x00000000, 0x00000404, 0x00010404, 0x01000000,
0x00010000, 0x01010404, 0x00000004, 0x01010000,
0x01010400, 0x01000000, 0x01000000, 0x00000400,
0x01010004, 0x00010000, 0x00010400, 0x01000004,
0x00000400, 0x00000004, 0x01000404, 0x00010404,
0x01010404, 0x00010004, 0x01010000, 0x01000404,
0x01000004, 0x00000404, 0x00010404, 0x01010400,
0x00000404, 0x01000400, 0x01000400, 0x00000000,
0x00010004, 0x00010400, 0x00000000, 0x01010004
};
static const unsigned long SB2[64] =
{
0x80108020, 0x80008000, 0x00008000, 0x00108020,
0x00100000, 0x00000020, 0x80100020, 0x80008020,
0x80000020, 0x80108020, 0x80108000, 0x80000000,
0x80008000, 0x00100000, 0x00000020, 0x80100020,
0x00108000, 0x00100020, 0x80008020, 0x00000000,
0x80000000, 0x00008000, 0x00108020, 0x80100000,
0x00100020, 0x80000020, 0x00000000, 0x00108000,
0x00008020, 0x80108000, 0x80100000, 0x00008020,
0x00000000, 0x00108020, 0x80100020, 0x00100000,
0x80008020, 0x80100000, 0x80108000, 0x00008000,
0x80100000, 0x80008000, 0x00000020, 0x80108020,
0x00108020, 0x00000020, 0x00008000, 0x80000000,
0x00008020, 0x80108000, 0x00100000, 0x80000020,
0x00100020, 0x80008020, 0x80000020, 0x00100020,
0x00108000, 0x00000000, 0x80008000, 0x00008020,
0x80000000, 0x80100020, 0x80108020, 0x00108000
};
static const unsigned long SB3[64] =
{
0x00000208, 0x08020200, 0x00000000, 0x08020008,
0x08000200, 0x00000000, 0x00020208, 0x08000200,
0x00020008, 0x08000008, 0x08000008, 0x00020000,
0x08020208, 0x00020008, 0x08020000, 0x00000208,
0x08000000, 0x00000008, 0x08020200, 0x00000200,
0x00020200, 0x08020000, 0x08020008, 0x00020208,
0x08000208, 0x00020200, 0x00020000, 0x08000208,
0x00000008, 0x08020208, 0x00000200, 0x08000000,
0x08020200, 0x08000000, 0x00020008, 0x00000208,
0x00020000, 0x08020200, 0x08000200, 0x00000000,
0x00000200, 0x00020008, 0x08020208, 0x08000200,
0x08000008, 0x00000200, 0x00000000, 0x08020008,
0x08000208, 0x00020000, 0x08000000, 0x08020208,
0x00000008, 0x00020208, 0x00020200, 0x08000008,
0x08020000, 0x08000208, 0x00000208, 0x08020000,
0x00020208, 0x00000008, 0x08020008, 0x00020200
};
static const unsigned long SB4[64] =
{
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802080, 0x00800081, 0x00800001, 0x00002001,
0x00000000, 0x00802000, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00800080, 0x00800001,
0x00000001, 0x00002000, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002001, 0x00002080,
0x00800081, 0x00000001, 0x00002080, 0x00800080,
0x00002000, 0x00802080, 0x00802081, 0x00000081,
0x00800080, 0x00800001, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00000000, 0x00802000,
0x00002080, 0x00800080, 0x00800081, 0x00000001,
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802081, 0x00000081, 0x00000001, 0x00002000,
0x00800001, 0x00002001, 0x00802080, 0x00800081,
0x00002001, 0x00002080, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002000, 0x00802080
};
static const unsigned long SB5[64] =
{
0x00000100, 0x02080100, 0x02080000, 0x42000100,
0x00080000, 0x00000100, 0x40000000, 0x02080000,
0x40080100, 0x00080000, 0x02000100, 0x40080100,
0x42000100, 0x42080000, 0x00080100, 0x40000000,
0x02000000, 0x40080000, 0x40080000, 0x00000000,
0x40000100, 0x42080100, 0x42080100, 0x02000100,
0x42080000, 0x40000100, 0x00000000, 0x42000000,
0x02080100, 0x02000000, 0x42000000, 0x00080100,
0x00080000, 0x42000100, 0x00000100, 0x02000000,
0x40000000, 0x02080000, 0x42000100, 0x40080100,
0x02000100, 0x40000000, 0x42080000, 0x02080100,
0x40080100, 0x00000100, 0x02000000, 0x42080000,
0x42080100, 0x00080100, 0x42000000, 0x42080100,
0x02080000, 0x00000000, 0x40080000, 0x42000000,
0x00080100, 0x02000100, 0x40000100, 0x00080000,
0x00000000, 0x40080000, 0x02080100, 0x40000100
};
static const unsigned long SB6[64] =
{
0x20000010, 0x20400000, 0x00004000, 0x20404010,
0x20400000, 0x00000010, 0x20404010, 0x00400000,
0x20004000, 0x00404010, 0x00400000, 0x20000010,
0x00400010, 0x20004000, 0x20000000, 0x00004010,
0x00000000, 0x00400010, 0x20004010, 0x00004000,
0x00404000, 0x20004010, 0x00000010, 0x20400010,
0x20400010, 0x00000000, 0x00404010, 0x20404000,
0x00004010, 0x00404000, 0x20404000, 0x20000000,
0x20004000, 0x00000010, 0x20400010, 0x00404000,
0x20404010, 0x00400000, 0x00004010, 0x20000010,
0x00400000, 0x20004000, 0x20000000, 0x00004010,
0x20000010, 0x20404010, 0x00404000, 0x20400000,
0x00404010, 0x20404000, 0x00000000, 0x20400010,
0x00000010, 0x00004000, 0x20400000, 0x00404010,
0x00004000, 0x00400010, 0x20004010, 0x00000000,
0x20404000, 0x20000000, 0x00400010, 0x20004010
};
static const unsigned long SB7[64] =
{
0x00200000, 0x04200002, 0x04000802, 0x00000000,
0x00000800, 0x04000802, 0x00200802, 0x04200800,
0x04200802, 0x00200000, 0x00000000, 0x04000002,
0x00000002, 0x04000000, 0x04200002, 0x00000802,
0x04000800, 0x00200802, 0x00200002, 0x04000800,
0x04000002, 0x04200000, 0x04200800, 0x00200002,
0x04200000, 0x00000800, 0x00000802, 0x04200802,
0x00200800, 0x00000002, 0x04000000, 0x00200800,
0x04000000, 0x00200800, 0x00200000, 0x04000802,
0x04000802, 0x04200002, 0x04200002, 0x00000002,
0x00200002, 0x04000000, 0x04000800, 0x00200000,
0x04200800, 0x00000802, 0x00200802, 0x04200800,
0x00000802, 0x04000002, 0x04200802, 0x04200000,
0x00200800, 0x00000000, 0x00000002, 0x04200802,
0x00000000, 0x00200802, 0x04200000, 0x00000800,
0x04000002, 0x04000800, 0x00000800, 0x00200002
};
static const unsigned long SB8[64] =
{
0x10001040, 0x00001000, 0x00040000, 0x10041040,
0x10000000, 0x10001040, 0x00000040, 0x10000000,
0x00040040, 0x10040000, 0x10041040, 0x00041000,
0x10041000, 0x00041040, 0x00001000, 0x00000040,
0x10040000, 0x10000040, 0x10001000, 0x00001040,
0x00041000, 0x00040040, 0x10040040, 0x10041000,
0x00001040, 0x00000000, 0x00000000, 0x10040040,
0x10000040, 0x10001000, 0x00041040, 0x00040000,
0x00041040, 0x00040000, 0x10041000, 0x00001000,
0x00000040, 0x10040040, 0x00001000, 0x00041040,
0x10001000, 0x00000040, 0x10000040, 0x10040000,
0x10040040, 0x10000000, 0x00040000, 0x10001040,
0x00000000, 0x10041040, 0x00040040, 0x10000040,
0x10040000, 0x10001000, 0x10001040, 0x00000000,
0x10041040, 0x00041000, 0x00041000, 0x00001040,
0x00001040, 0x00040040, 0x10000000, 0x10041000
};
/*
* PC1: left and right halves bit-swap
*/
static const unsigned long LHs[16] =
{
0x00000000, 0x00000001, 0x00000100, 0x00000101,
0x00010000, 0x00010001, 0x00010100, 0x00010101,
0x01000000, 0x01000001, 0x01000100, 0x01000101,
0x01010000, 0x01010001, 0x01010100, 0x01010101
};
static const unsigned long RHs[16] =
{
0x00000000, 0x01000000, 0x00010000, 0x01010000,
0x00000100, 0x01000100, 0x00010100, 0x01010100,
0x00000001, 0x01000001, 0x00010001, 0x01010001,
0x00000101, 0x01000101, 0x00010101, 0x01010101,
};
/*
* Initial Permutation macro
*/
#define DES_IP(X,Y) \
{ \
T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4); \
T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16); \
T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2); \
T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8); \
Y = ((Y << 1) | (Y >> 31)) & 0xFFFFFFFF; \
T = (X ^ Y) & 0xAAAAAAAA; Y ^= T; X ^= T; \
X = ((X << 1) | (X >> 31)) & 0xFFFFFFFF; \
}
/*
* Final Permutation macro
*/
#define DES_FP(X,Y) \
{ \
X = ((X << 31) | (X >> 1)) & 0xFFFFFFFF; \
T = (X ^ Y) & 0xAAAAAAAA; X ^= T; Y ^= T; \
Y = ((Y << 31) | (Y >> 1)) & 0xFFFFFFFF; \
T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8); \
T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2); \
T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16); \
T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4); \
}
/*
* DES round macro
*/
#define DES_ROUND(X,Y) \
{ \
T = *SK++ ^ X; \
Y ^= SB8[ (T ) & 0x3F ] ^ \
SB6[ (T >> 8) & 0x3F ] ^ \
SB4[ (T >> 16) & 0x3F ] ^ \
SB2[ (T >> 24) & 0x3F ]; \
\
T = *SK++ ^ ((X << 28) | (X >> 4)); \
Y ^= SB7[ (T ) & 0x3F ] ^ \
SB5[ (T >> 8) & 0x3F ] ^ \
SB3[ (T >> 16) & 0x3F ] ^ \
SB1[ (T >> 24) & 0x3F ]; \
}
static void des_main_ks( unsigned long SK[32], unsigned char key[8] )
{
int i;
unsigned long X, Y, T;
GET_UINT32_BE( X, key, 0 );
GET_UINT32_BE( Y, key, 4 );
/*
* Permuted Choice 1
*/
T = ((Y >> 4) ^ X) & 0x0F0F0F0F; X ^= T; Y ^= (T << 4);
T = ((Y ) ^ X) & 0x10101010; X ^= T; Y ^= (T );
X = (LHs[ (X ) & 0xF] << 3) | (LHs[ (X >> 8) & 0xF ] << 2)
| (LHs[ (X >> 16) & 0xF] << 1) | (LHs[ (X >> 24) & 0xF ] )
| (LHs[ (X >> 5) & 0xF] << 7) | (LHs[ (X >> 13) & 0xF ] << 6)
| (LHs[ (X >> 21) & 0xF] << 5) | (LHs[ (X >> 29) & 0xF ] << 4);
Y = (RHs[ (Y >> 1) & 0xF] << 3) | (RHs[ (Y >> 9) & 0xF ] << 2)
| (RHs[ (Y >> 17) & 0xF] << 1) | (RHs[ (Y >> 25) & 0xF ] )
| (RHs[ (Y >> 4) & 0xF] << 7) | (RHs[ (Y >> 12) & 0xF ] << 6)
| (RHs[ (Y >> 20) & 0xF] << 5) | (RHs[ (Y >> 28) & 0xF ] << 4);
X &= 0x0FFFFFFF;
Y &= 0x0FFFFFFF;
/*
* calculate subkeys
*/
for( i = 0; i < 16; i++ )
{
if( i < 2 || i == 8 || i == 15 )
{
X = ((X << 1) | (X >> 27)) & 0x0FFFFFFF;
Y = ((Y << 1) | (Y >> 27)) & 0x0FFFFFFF;
}
else
{
X = ((X << 2) | (X >> 26)) & 0x0FFFFFFF;
Y = ((Y << 2) | (Y >> 26)) & 0x0FFFFFFF;
}
*SK++ = ((X << 4) & 0x24000000) | ((X << 28) & 0x10000000)
| ((X << 14) & 0x08000000) | ((X << 18) & 0x02080000)
| ((X << 6) & 0x01000000) | ((X << 9) & 0x00200000)
| ((X >> 1) & 0x00100000) | ((X << 10) & 0x00040000)
| ((X << 2) & 0x00020000) | ((X >> 10) & 0x00010000)
| ((Y >> 13) & 0x00002000) | ((Y >> 4) & 0x00001000)
| ((Y << 6) & 0x00000800) | ((Y >> 1) & 0x00000400)
| ((Y >> 14) & 0x00000200) | ((Y ) & 0x00000100)
| ((Y >> 5) & 0x00000020) | ((Y >> 10) & 0x00000010)
| ((Y >> 3) & 0x00000008) | ((Y >> 18) & 0x00000004)
| ((Y >> 26) & 0x00000002) | ((Y >> 24) & 0x00000001);
*SK++ = ((X << 15) & 0x20000000) | ((X << 17) & 0x10000000)
| ((X << 10) & 0x08000000) | ((X << 22) & 0x04000000)
| ((X >> 2) & 0x02000000) | ((X << 1) & 0x01000000)
| ((X << 16) & 0x00200000) | ((X << 11) & 0x00100000)
| ((X << 3) & 0x00080000) | ((X >> 6) & 0x00040000)
| ((X << 15) & 0x00020000) | ((X >> 4) & 0x00010000)
| ((Y >> 2) & 0x00002000) | ((Y << 8) & 0x00001000)
| ((Y >> 14) & 0x00000808) | ((Y >> 9) & 0x00000400)
| ((Y ) & 0x00000200) | ((Y << 7) & 0x00000100)
| ((Y >> 7) & 0x00000020) | ((Y >> 3) & 0x00000011)
| ((Y << 2) & 0x00000004) | ((Y >> 21) & 0x00000002);
}
}
/*
* DES key schedule (56-bit)
*/
void des_set_key( des_context *ctx, unsigned char key[8] )
{
int i;
des_main_ks( ctx->esk, key );
for( i = 0; i < 32; i += 2 )
{
ctx->dsk[i ] = ctx->esk[30 - i];
ctx->dsk[i + 1] = ctx->esk[31 - i];
}
}
static void des_crypt( unsigned long SK[32],
unsigned char input[8],
unsigned char output[8] )
{
unsigned long X, Y, T;
GET_UINT32_BE( X, input, 0 );
GET_UINT32_BE( Y, input, 4 );
DES_IP( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_FP( Y, X );
PUT_UINT32_BE( Y, output, 0 );
PUT_UINT32_BE( X, output, 4 );
}
/*
* DES block encryption (ECB mode)
*/
void des_encrypt( des_context *ctx,
unsigned char input[8],
unsigned char output[8] )
{
des_crypt( ctx->esk, input, output );
}
/*
* DES block decryption (ECB mode)
*/
void des_decrypt( des_context *ctx,
unsigned char input[8],
unsigned char output[8] )
{
des_crypt( ctx->dsk, input, output );
}
/*
* DES-CBC buffer encryption
*/
void des_cbc_encrypt( des_context *ctx,
unsigned char iv[8],
unsigned char *input,
unsigned char *output,
int len )
{
int i;
while( len > 0 )
{
for( i = 0; i < 8; i++ )
output[i] = input[i] ^ iv[i];
des_crypt( ctx->esk, output, output );
memcpy( iv, output, 8 );
input += 8;
output += 8;
len -= 8;
}
}
/*
* DES-CBC buffer decryption
*/
void des_cbc_decrypt( des_context *ctx,
unsigned char iv[8],
unsigned char *input,
unsigned char *output,
int len )
{
int i;
unsigned char temp[8];
while( len > 0 )
{
memcpy( temp, input, 8 );
des_crypt( ctx->dsk, input, output );
for( i = 0; i < 8; i++ )
output[i] = output[i] ^ iv[i];
memcpy( iv, temp, 8 );
input += 8;
output += 8;
len -= 8;
}
}
/*
* Triple-DES key schedule (112-bit)
*/
void des3_set_2keys( des3_context *ctx, unsigned char key[16] )
{
int i;
des_main_ks( ctx->esk , key );
des_main_ks( ctx->dsk + 32, key + 8 );
for( i = 0; i < 32; i += 2 )
{
ctx->dsk[i ] = ctx->esk[30 - i];
ctx->dsk[i + 1] = ctx->esk[31 - i];
ctx->esk[i + 32] = ctx->dsk[62 - i];
ctx->esk[i + 33] = ctx->dsk[63 - i];
ctx->esk[i + 64] = ctx->esk[ i];
ctx->esk[i + 65] = ctx->esk[ 1 + i];
ctx->dsk[i + 64] = ctx->dsk[ i];
ctx->dsk[i + 65] = ctx->dsk[ 1 + i];
}
}
/*
* Triple-DES key schedule (168-bit)
*/
void des3_set_3keys( des3_context *ctx, unsigned char key[24] )
{
int i;
des_main_ks( ctx->esk , key );
des_main_ks( ctx->dsk + 32, key + 8 );
des_main_ks( ctx->esk + 64, key + 16 );
for( i = 0; i < 32; i += 2 )
{
ctx->dsk[i ] = ctx->esk[94 - i];
ctx->dsk[i + 1] = ctx->esk[95 - i];
ctx->esk[i + 32] = ctx->dsk[62 - i];
ctx->esk[i + 33] = ctx->dsk[63 - i];
ctx->dsk[i + 64] = ctx->esk[30 - i];
ctx->dsk[i + 65] = ctx->esk[31 - i];
}
}
static void des3_crypt( unsigned long SK[96],
unsigned char input[8],
unsigned char output[8] )
{
unsigned long X, Y, T;
GET_UINT32_BE( X, input, 0 );
GET_UINT32_BE( Y, input, 4 );
DES_IP( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( X, Y ); DES_ROUND( Y, X );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_ROUND( Y, X ); DES_ROUND( X, Y );
DES_FP( Y, X );
PUT_UINT32_BE( Y, output, 0 );
PUT_UINT32_BE( X, output, 4 );
}
/*
* Triple-DES block encryption (ECB mode)
*/
void des3_encrypt( des3_context *ctx,
unsigned char input[8],
unsigned char output[8] )
{
des3_crypt( ctx->esk, input, output );
}
/*
* Triple-DES block decryption (ECB mode)
*/
void des3_decrypt( des3_context *ctx,
unsigned char input[8],
unsigned char output[8] )
{
des3_crypt( ctx->dsk, input, output );
}
/*
* 3DES-CBC buffer encryption
*/
void des3_cbc_encrypt( des3_context *ctx,
unsigned char iv[8],
unsigned char *input,
unsigned char *output,
int len )
{
int i;
while( len > 0 )
{
for( i = 0; i < 8; i++ )
output[i] = input[i] ^ iv[i];
des3_crypt( ctx->esk, output, output );
memcpy( iv, output, 8 );
input += 8;
output += 8;
len -= 8;
}
}
/*
* 3DES-CBC buffer decryption
*/
void des3_cbc_decrypt( des3_context *ctx,
unsigned char iv[8],
unsigned char *input,
unsigned char *output,
int len )
{
int i;
unsigned char temp[8];
while( len > 0 )
{
memcpy( temp, input, 8 );
des3_crypt( ctx->dsk, input, output );
for( i = 0; i < 8; i++ )
output[i] = output[i] ^ iv[i];
memcpy( iv, temp, 8 );
input += 8;
output += 8;
len -= 8;
}
}
void GetDES3Key(char *key,char *Des3key)
{
int i,j,len;
len = strlen(key);
for ( i=0,j=0;i<24;i++,j++) {
if(j>=len)
j=0;
Des3key[i]=key[j];
}
}
/*Out的容量必须可以包含In不是8的倍数时补位数据*/
int TZ_Des3_Encrypt(char *Out,char *In,long datalen,char *Key,char bInsertType)
{
des3_context ctx3;
char DES3_keys[24];
char bInsertByte[8];
char bFillByte;
int i, j;
GetDES3Key(Key,DES3_keys);
des3_set_3keys( &ctx3, (unsigned char *) DES3_keys );
j=datalen>>3;
for( i=0; i<j; i++)
{
des3_encrypt( &ctx3, In, Out );
Out+=8;
In+=8;
}
if((datalen&7)!=0)
{
j = (datalen&7);
for(i=0;i<j;i++)
bInsertByte[i] = *(In+i);
bFillByte = 0;
if(bInsertType==DES3_INSERT_OTHER_MODE)
bFillByte = 8-j;
for(i=j;i<8;i++)
bInsertByte[i] = bFillByte;
des3_encrypt( &ctx3, bInsertByte, Out );
datalen = (datalen+8)&0xfff8;
}
else
{
for(i=0;i<8;i++)
bInsertByte[i] = 8;
des3_encrypt( &ctx3, bInsertByte, Out );
datalen = datalen+8;
}
return datalen;
}
int TZ_Des3_Decrypt(char *Out,char *In,long datalen, char *Key,char bInsertType)
{
des3_context ctx3;
char DES3_keys[24];
int i, j;
char bLastByte;
char bInsertByte[8];
if((datalen&7)!=0)
return 0;
GetDES3Key(Key,DES3_keys);
des3_set_3keys( &ctx3, (unsigned char *) DES3_keys );
j=datalen>>3;
for( i=0; i<j; i++)
{
des3_decrypt( &ctx3, In, Out );
Out+=8;
In+=8;
}
if(bInsertType==DES3_INSERT_OTHER_MODE)
{
bLastByte = *(Out-1);
// if(bLastByte <=7)
{
for(i = (8-bLastByte) ;i<8;i++)
bInsertByte[i] = bLastByte;
if(memcmp(&bInsertByte[8-bLastByte],(Out-bLastByte),bLastByte)==0)
return (datalen-bLastByte);
}
}
return datalen;
}
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