int main(int argc,char *argv[])
{
if(argc < 2)
{
printf("usage:\n");
printf("%s string.\n",argv[0]);
return 0;
}
char *encdata = NULL;
int encLen = (strlen(argv[1])/16+1)*16;
encdata = malloc(encLen);
sm4_context ctx;
sm4_setkey_enc(&ctx,key);
sm4_crypt_ecb(&ctx,1,strlen((const char *)argv[1]),argv[1],encdata);
printf("Enc Data[%d] :",encLen);
printHex(encdata,encLen);
char *decdata = malloc(encLen);
sm4_setkey_dec(&ctx,key);
sm4_crypt_ecb(&ctx,0,encLen,encdata,decdata);
printf("Dec Data:%s\n",decdata);
free(encdata);
free(decdata);
}
int crypt_dec_block(cipher_context *cctx, uint8 *in, uint8 *out, int len)
{
if(len%cctx->block_size)
return 0;
switch(cctx->alg){
case ALG_AES_ECB:
case ALG_AES_CTR:
{
int j;
for(j=0; j<len; j+=cctx->block_size){
AES_decrypt(in+j, out+j, cctx->enc_ctx);
}
return 1;
}
case ALG_AES_CBC:
{
int i, j;
uint8 temp[MAX_CIPHER_BLOCK_SIZE];
for(j=0; j<len; j+=cctx->block_size){
memcpy(temp, in+j, cctx->block_size);
AES_decrypt(temp, out+j, cctx->enc_ctx);
for(i=0; i<cctx->block_size; i++){
out[j+i]^=cctx->iv[i];
}
memcpy(cctx->iv, temp, cctx->block_size);
}
return 1;
}
case ALG_SM4_ECB:
case ALG_SM4_CTR:
sm4_crypt_ecb(cctx->enc_ctx, SM4_DECRYPT, len, in, out);
return 1;
break;
case ALG_SM4_CBC:
sm4_crypt_cbc(cctx->enc_ctx, SM4_DECRYPT, len, cctx->iv, in, out);
return 1;
break;
}
return 0;
}
int crypt_enc_block(cipher_context *cctx, uint8 *in, uint8 *out, int len)
{
if(len%cctx->block_size)
return 0;
switch(cctx->alg){
case ALG_AES_ECB:
case ALG_AES_CTR:
{
int j;
for(j=0; j<len; j+=cctx->block_size){
AES_encrypt(in+j, out+j, cctx->enc_ctx);
}
return 1;
}
case ALG_AES_CBC:
{
int i, j;
uint8* piv;
uint8 temp[MAX_CIPHER_BLOCK_SIZE];
piv=cctx->iv;
for(j=0; j<len; j+=cctx->block_size){
for(i=0; i<cctx->block_size; i++)
temp[i]=in[j+i]^piv[i];
AES_encrypt(temp, out+j, cctx->enc_ctx);
piv=out+j;
}
memcpy(cctx->iv, out+j-cctx->block_size, cctx->block_size);
return 1;
}
case ALG_SM4_ECB:
case ALG_SM4_CTR:
sm4_crypt_ecb(cctx->enc_ctx, SM4_ENCRYPT, len, in, out);
return 1;
case ALG_SM4_CBC:
sm4_crypt_cbc(cctx->enc_ctx, SM4_ENCRYPT, len, cctx->iv, in, out);
return 1;
}
return 0;
}
