267 lines
7.6 KiB
C++
267 lines
7.6 KiB
C++
|
|
|
|
#include "StdAfx.h"
|
|
#include "sm4.h"
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
|
|
#ifndef GET_ULONG_BE
|
|
#define GET_ULONG_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_ULONG_BE
|
|
#define PUT_ULONG_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
|
|
|
|
|
|
#define SHL(x,n) (((x) & 0xFFFFFFFF) << n)
|
|
#define ROTL(x,n) (SHL((x),n) | ((x) >> (32 - n)))
|
|
|
|
#define SWAP(a,b) { unsigned long t = a; a = b; b = t; t = 0; }
|
|
|
|
static const unsigned char SboxTable[16][16] =
|
|
{
|
|
{0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05},
|
|
{0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99},
|
|
{0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62},
|
|
{0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6},
|
|
{0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8},
|
|
{0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35},
|
|
{0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87},
|
|
{0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e},
|
|
{0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1},
|
|
{0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3},
|
|
{0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f},
|
|
{0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51},
|
|
{0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8},
|
|
{0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0},
|
|
{0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84},
|
|
{0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48}
|
|
};
|
|
|
|
static const unsigned long FK[4] = {0xa3b1bac6,0x56aa3350,0x677d9197,0xb27022dc};
|
|
static const unsigned long CK[32] =
|
|
{
|
|
0x00070e15,0x1c232a31,0x383f464d,0x545b6269,
|
|
0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,
|
|
0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,
|
|
0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,
|
|
0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,
|
|
0x30373e45,0x4c535a61,0x686f767d,0x848b9299,
|
|
0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,
|
|
0x10171e25,0x2c333a41,0x484f565d,0x646b7279
|
|
};
|
|
|
|
|
|
|
|
static unsigned char sm4Sbox(unsigned char inch)
|
|
{
|
|
unsigned char *pTable = (unsigned char *)SboxTable;
|
|
unsigned char retVal = (unsigned char)(pTable[inch]);
|
|
return retVal;
|
|
}
|
|
|
|
|
|
static unsigned long sm4Lt(unsigned long ka)
|
|
{
|
|
unsigned long bb = 0;
|
|
unsigned long c = 0;
|
|
unsigned char a[4];
|
|
unsigned char b[4];
|
|
PUT_ULONG_BE(ka,a,0)
|
|
b[0] = sm4Sbox(a[0]);
|
|
b[1] = sm4Sbox(a[1]);
|
|
b[2] = sm4Sbox(a[2]);
|
|
b[3] = sm4Sbox(a[3]);
|
|
GET_ULONG_BE(bb,b,0)
|
|
c =bb^(ROTL(bb, 2))^(ROTL(bb, 10))^(ROTL(bb, 18))^(ROTL(bb, 24));
|
|
return c;
|
|
}
|
|
|
|
|
|
static unsigned long sm4F(unsigned long x0, unsigned long x1, unsigned long x2, unsigned long x3, unsigned long rk)
|
|
{
|
|
return (x0^sm4Lt(x1^x2^x3^rk));
|
|
}
|
|
|
|
|
|
|
|
static unsigned long sm4CalciRK(unsigned long ka)
|
|
{
|
|
unsigned long bb = 0;
|
|
unsigned long rk = 0;
|
|
unsigned char a[4];
|
|
unsigned char b[4];
|
|
PUT_ULONG_BE(ka,a,0)
|
|
b[0] = sm4Sbox(a[0]);
|
|
b[1] = sm4Sbox(a[1]);
|
|
b[2] = sm4Sbox(a[2]);
|
|
b[3] = sm4Sbox(a[3]);
|
|
GET_ULONG_BE(bb,b,0)
|
|
rk = bb^(ROTL(bb, 13))^(ROTL(bb, 23));
|
|
return rk;
|
|
}
|
|
|
|
static void sm4_setkey( unsigned long SK[32], unsigned char key[16] )
|
|
{
|
|
unsigned long MK[4];
|
|
unsigned long k[36];
|
|
unsigned long i = 0;
|
|
|
|
GET_ULONG_BE( MK[0], key, 0 );
|
|
GET_ULONG_BE( MK[1], key, 4 );
|
|
GET_ULONG_BE( MK[2], key, 8 );
|
|
GET_ULONG_BE( MK[3], key, 12 );
|
|
k[0] = MK[0]^FK[0];
|
|
k[1] = MK[1]^FK[1];
|
|
k[2] = MK[2]^FK[2];
|
|
k[3] = MK[3]^FK[3];
|
|
for(; i<32; i++)
|
|
{
|
|
k[i+4] = k[i] ^ (sm4CalciRK(k[i+1]^k[i+2]^k[i+3]^CK[i]));
|
|
SK[i] = k[i+4];
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static void sm4_one_round( unsigned long sk[32],
|
|
unsigned char input[16],
|
|
unsigned char output[16] )
|
|
{
|
|
unsigned long i = 0;
|
|
unsigned long ulbuf[36];
|
|
|
|
memset(ulbuf, 0, sizeof(ulbuf));
|
|
GET_ULONG_BE( ulbuf[0], input, 0 )
|
|
GET_ULONG_BE( ulbuf[1], input, 4 )
|
|
GET_ULONG_BE( ulbuf[2], input, 8 )
|
|
GET_ULONG_BE( ulbuf[3], input, 12 )
|
|
while(i<32)
|
|
{
|
|
ulbuf[i+4] = sm4F(ulbuf[i], ulbuf[i+1], ulbuf[i+2], ulbuf[i+3], sk[i]);
|
|
i++;
|
|
}
|
|
PUT_ULONG_BE(ulbuf[35],output,0);
|
|
PUT_ULONG_BE(ulbuf[34],output,4);
|
|
PUT_ULONG_BE(ulbuf[33],output,8);
|
|
PUT_ULONG_BE(ulbuf[32],output,12);
|
|
}
|
|
|
|
|
|
void sm4_setkey_enc( sm4_context *ctx, unsigned char key[16] )
|
|
{
|
|
ctx->mode = SM4_ENCRYPT;
|
|
sm4_setkey( ctx->sk, key );
|
|
}
|
|
|
|
|
|
void sm4_setkey_dec( sm4_context *ctx, unsigned char key[16] )
|
|
{
|
|
int i;
|
|
ctx->mode = SM4_ENCRYPT;
|
|
sm4_setkey( ctx->sk, key );
|
|
for( i = 0; i < 16; i ++ )
|
|
{
|
|
SWAP( ctx->sk[ i ], ctx->sk[ 31-i] );
|
|
}
|
|
}
|
|
|
|
|
|
void sm4_crypt_ecb( sm4_context *ctx,
|
|
int mode,
|
|
int length,
|
|
unsigned char *input,
|
|
unsigned char *output)
|
|
{
|
|
while( length > 0 )
|
|
{
|
|
sm4_one_round( ctx->sk, input, output );
|
|
input += 16;
|
|
output += 16;
|
|
length -= 16;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void sm4_crypt_cbc( sm4_context *ctx,
|
|
int mode,
|
|
int length,
|
|
unsigned char iv[16],
|
|
unsigned char *input,
|
|
unsigned char *output )
|
|
{
|
|
int i;
|
|
unsigned char temp[16];
|
|
|
|
if( mode == SM4_ENCRYPT )
|
|
{
|
|
while( length > 0 )
|
|
{
|
|
for( i = 0; i < 16; i++ )
|
|
output[i] = (unsigned char)( input[i] ^ iv[i] );
|
|
|
|
sm4_one_round( ctx->sk, output, output );
|
|
memcpy( iv, output, 16 );
|
|
|
|
input += 16;
|
|
output += 16;
|
|
length -= 16;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while( length > 0 )
|
|
{
|
|
memcpy( temp, input, 16 );
|
|
sm4_one_round( ctx->sk, input, output );
|
|
|
|
for( i = 0; i < 16; i++ )
|
|
output[i] = (unsigned char)( output[i] ^ iv[i] );
|
|
|
|
memcpy( iv, temp, 16 );
|
|
|
|
input += 16;
|
|
output += 16;
|
|
length -= 16;
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned char SM4publickey[ 16 ] = {0x21,0x05,0x35,0x57,0x81,0xcb,0xad,0x0f,0xf0,0xda,0xaa,0x58,0x36,0x34,0x22,0x16};
|
|
int SM4EnCrypt( const char *lpbufin, int bufinLen, char *lpbufout, int bufoutLen )
|
|
{
|
|
sm4_context ctx;
|
|
if ( lpbufin && bufinLen >0 && lpbufout && bufoutLen >0 ){
|
|
sm4_setkey_enc( &ctx,SM4publickey );
|
|
sm4_crypt_ecb (&ctx,1,bufinLen,(unsigned char*)lpbufin,(unsigned char*)lpbufout);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int SM4DeCrypt( const char *lpbufin, int bufinLen, char *lpbufout, int bufoutLen )
|
|
{
|
|
sm4_context ctx;
|
|
if ( lpbufin && bufinLen >0 && lpbufout && bufoutLen >0 ){
|
|
sm4_setkey_dec(&ctx,SM4publickey);
|
|
sm4_crypt_ecb(&ctx, 0, bufinLen, (unsigned char*)lpbufin, (unsigned char*)lpbufout);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
粤公网安备44010602013451号