int main()
{
UINT64 plain, key, o;
char *passphrase = "SECURITY";
char *plaintext = "NETWORK INFORMATION SECURITY";
char output[100];
char output2[100];
key = *(UINT64*)passphrase;
int len = strlen(plaintext)+1;
int outputlen = (len+7)&0xfffffff8;
for (int i=0; i<len; i+=8) {
*(UINT64*)(output+i) = DES_encrypt(*(UINT64*)(plaintext+i), key);
}
puts("\nDES (CBC mode) final result:");
for (int i=0; i<outputlen; i++) {
printf("%02hhx ", output[i]);
}
puts("\n");
// decrypt to verify
puts("decrypt the text to verify:");
for (int i=0; i<outputlen; i+=8) {
*(UINT64*)(output2+i) = DES_decrypt(*(UINT64*)(output+i), key);
}
puts(output2);
return 0;
}
int main()
{
freopen("./tests.txt", "r", stdin);
int tests_count = 0;
scanf("%d\n", &tests_count);
for (int test = 0; test < tests_count; ++test) {
uint8_t key[8] = {0};
read_block(key);
uint8_t data[block_length] = {0};
uint8_t encrypted[block_length] = {0};
read_block(data);
uint8_t expected_result[block_length] = {0};
read_block(expected_result);
DES_encrypt(data, encrypted, key, block_length);
for (size_t i = 0; i < block_length; ++i) {
assert(encrypted[i] == expected_result[i]);
}
uint8_t decrypted[block_length] = {0};
DES_decrypt(encrypted, decrypted, key, block_length);
for (size_t i = 0; i < block_length; ++i) {
assert(decrypted[i] == data[i]);
}
}
printf("All tests passed\n");
return 0;
}
