uint32_t decrypt_with_mode(const BYTE *password, const BYTE* data, uint32_t len, BYTE* ans, encrypt_mode mode, encrypt_method method) {
uint32_t outl;
switch (mode) {
case AES128:
outl = decrypt_aes128(password, data, len, ans, method);
break;
case AES192:
outl = decrypt_aes192(password, data, len, ans, method);
break;
case AES256:
outl = decrypt_aes256(password, data, len, ans, method);
break;
case DES:
outl = decrypt_des(password, data, len, ans, method);
break;
}
return outl;
}
int main() {
DES_cblock cb1 = { 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE };
DES_cblock cb2 = { 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE };
DES_cblock cb3 = { 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE, 0xAE };
DES_key_schedule ks1,ks2,ks3;
DES_cblock cblock = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
char string[] = "I am a software developer, bbbxxxxxxxxxx, gjeogjeogjeojsb";
int ret = -1;
// ---------------------------------------------
// I use sizeof instead of strlen because I want
// to count the '\0' at the end, strlen would
// not count it
int stringLen = strlen(string) + 1;
int cipherLen = stringLen *2;
printf("Plain Text : %s\n",string);
char *cipher = (char*)malloc(cipherLen);
char *text = (char*)malloc(stringLen);
memset(cipher, 0, cipherLen);
memset(text,0,stringLen);
DES_set_odd_parity(&cblock);
if (DES_set_key_checked(&cb1, &ks1) ||
DES_set_key_checked(&cb2, &ks2) ||
DES_set_key_checked(&cb3, &ks3)) {
printf("Key error, exiting ....\n");
return 1;
}
// ks1的值是根据解密是的数据变化的，所以该方法失败。
ret = encrypt_des(&cblock, &ks1, &ks2, &ks3, cipher, string, stringLen);
if (ret < 0) {
return ret;
}
ret = decrypt_des(cipher, text, &ks1, &ks2, &ks3, &cblock, cipherLen);
if (ret < 0) {
return ret;
}
return 0;
}
static void des_test_withmode(int mode)
{
DEBUG("\n\n== des_test_withmode (%s) ==\n", des_getmode(mode));
char *testData = des_padding(gTestData0);
if (testData == NULL) return NULL;
size_t out_len = 0;
char *encrypted = encrypt_des((const char*)testData, strlen(testData), gPassword, mode, &out_len);
if (encrypted != NULL) {
des_dump(encrypted, out_len);
char *plain = decrypt_des(encrypted, out_len, gPassword, mode, &out_len);
if (plain != NULL) {
DEBUG("%s : plain text =\n%s \n", __func__, plain);
if (strncmp(plain, testData, strlen(testData)) == 0) {
DEBUG("%s : Success \n", __func__);
} else {
DEBUG("%s : Fail \n", __func__);
}
DO_FREE(plain);
}
DO_FREE(encrypted);
}
DO_FREE(testData);
}