public static void main(String[] args) {
SHA1 sha = new SHA1();
byte[] dig1 = new byte[20];
byte[] dig2 = new byte[20];
byte[] dig3 = new byte[20];
/*
* We do not specify a charset name for getBytes(), since we assume that
* the JVM's default encoder maps the _used_ ASCII characters exactly as
* getBytes("US-ASCII") would do. (Ah, yes, too lazy to catch the
* exception that can be thrown by getBytes("US-ASCII")). Note: This has
* no effect on the SHA-1 implementation, this is just for the following
* test code.
*/
sha.update("abc".getBytes());
sha.digest(dig1);
sha.update("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".getBytes());
sha.digest(dig2);
for (int i = 0; i < 1000000; i++) sha.update((byte) 'a');
sha.digest(dig3);
String dig1_res = toHexString(dig1);
String dig2_res = toHexString(dig2);
String dig3_res = toHexString(dig3);
String dig1_ref = "A9993E364706816ABA3E25717850C26C9CD0D89D";
String dig2_ref = "84983E441C3BD26EBAAE4AA1F95129E5E54670F1";
String dig3_ref = "34AA973CD4C4DAA4F61EEB2BDBAD27316534016F";
if (dig1_res.equals(dig1_ref)) System.out.println("SHA-1 Test 1 OK.");
else System.out.println("SHA-1 Test 1 FAILED.");
if (dig2_res.equals(dig2_ref)) System.out.println("SHA-1 Test 2 OK.");
else System.out.println("SHA-1 Test 2 FAILED.");
if (dig3_res.equals(dig3_ref)) System.out.println("SHA-1 Test 3 OK.");
else System.out.println("SHA-1 Test 3 FAILED.");
if (dig3_res.equals(dig3_ref)) System.out.println("SHA-1 Test 3 OK.");
else System.out.println("SHA-1 Test 3 FAILED.");
}
/**
* To save from Attacks on Parameter Authentication one can send hash of parameters to other party
*
* @return byte[] of what???
*/
@Override
public byte[] getParametersHash() {
byte[] parms = NativeLib.getECParameters(ecGroup);
SHA1 sha1 = new SHA1(BLOCK_SIZE);
sha1.update(parms, 0, parms.length);
sha1.generate();
byte[] digest = sha1.getDigest();
return digest;
}
@Override
public boolean checkParametersHash(byte[] hash) {
if (hash == null || hash.length != BLOCK_SIZE) return false;
byte[] parms = NativeLib.getECParameters(ecGroup);
SHA1 sha1 = new SHA1(BLOCK_SIZE);
sha1.update(parms, 0, parms.length);
sha1.generate();
byte[] digest = sha1.getDigest();
for (int i = 0; i < digest.length; i++) if (digest[i] != hash[i]) return false;
return true;
}
/**
* Runs an integrity test.
*
* @return true: selftest passed / false: selftest failed
*/
public boolean selfTest() {
int nI;
SHA1 tester;
byte[] digest;
tester = new SHA1();
tester.update(SELFTEST_MESSAGE);
tester.finalize();
digest = tester.getDigest();
for (nI = 0; nI < DIGEST_SIZE; nI++) {
if (digest[nI] != SELFTEST_DIGEST[nI]) {
return false;
}
}
return true;
}
