/**
* self-test routine for AES cipher
*
* @param args command line arguments
*/
public String _cryptAll(String data, int mode) {
AesAlgorithm aesAlgorithm = this;
if (data.length() / 16 > ((int) data.length() / 16)) {
int rest = data.length() - ((int) data.length() / 16) * 16;
for (int i = 0; i < rest; i++) data += " ";
}
int nParts = (int) data.length() / 16;
byte[] res = new byte[data.length()];
String partStr = "";
byte[] partByte = new byte[16];
for (int p = 0; p < nParts; p++) {
partStr = data.substring(p * 16, p * 16 + 16);
partByte = static_stringToByteArray(partStr);
if (mode == 1) partByte = aesAlgorithm.encrypt(partByte);
if (mode == 2) partByte = aesAlgorithm.decrypt(partByte);
for (int b = 0; b < 16; b++) res[p * 16 + b] = partByte[b];
}
return static_byteArrayToString(res);
}
/**
* self-test routine for AES cipher
*
* @param hkey key to test in hex
* @param hplain plaintext to test in hex
* @param hcipher ciphertext to test in hex
* @param lev trace level to use
*/
public static void self_test(String hkey, String hplain, String hcipher, int lev) {
// AES test triple (128-bit key test value from FIPS-197)
byte[] key = Util.hex2byte(hkey);
byte[] plain = Util.hex2byte(hplain);
byte[] cipher = Util.hex2byte(hcipher);
byte[] result;
AesAlgorithm testAES = new AesAlgorithm(); // create new AES instance to test triple
testAES.traceLevel = lev; // select level of trace info
testAES.setKey(key); // set key and display trace info
System.out.print(testAES.traceInfo);
result = testAES.encrypt(plain); // test encryption
System.out.print(testAES.traceInfo);
if (Arrays.equals(result, cipher)) System.out.print("Test OKn");
else System.out.print("Test Failed. Result was " + Util.toHEX(result) + "n");
result = testAES.decrypt(cipher); // test decryption
System.out.print(testAES.traceInfo);
if (Arrays.equals(result, plain)) System.out.print("Test OKn");
else System.out.print("Test Failed. Result was " + Util.toHEX(result) + "n");
System.out.println();
}