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package org.bouncycastle.crypto.test;
import java.util.Random;
import org.bouncycastle.crypto.digests.Blake2sDigest;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Strings;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
public class Blake2sDigestTest
extends SimpleTest
{
// Vectors from BLAKE2 web site: https://blake2.net/blake2s-test.txt
private static final String[][] keyedTestVectors = {
// input/message, key, hash
{
"",
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
"48a8997da407876b3d79c0d92325ad3b89cbb754d86ab71aee047ad345fd2c49",
},
{
"00",
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
"40d15fee7c328830166ac3f918650f807e7e01e177258cdc0a39b11f598066f1",
},
{
"0001",
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
"6bb71300644cd3991b26ccd4d274acd1adeab8b1d7914546c1198bbe9fc9d803",
},
{
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f404142434445464748494a4b4c4d",
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
"172ffc67153d12e0ca76a8b6cd5d4731885b39ce0cac93a8972a18006c8b8baf",
},
{
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5d5e5f606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3",
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
"4f8ce1e51d2fe7f24043a904d898ebfc91975418753413aa099b795ecb35cedb",
},
{
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5d5e5f606162636465666768696a6b6c6d6e6f707172737475767778797a7b7c7d7e7f808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f8f9fafbfcfdfe",
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
"3fb735061abc519dfe979e54c1ee5bfad0a9d858b3315bad34bde999efd724dd",
},
};
public String getName()
{
return "BLAKE2s";
}
public void testDigestWithKeyedTestVectors()
{
Blake2sDigest digest = new Blake2sDigest(Hex.decode(
keyedTestVectors[0][1]));
for (int i = 0; i != keyedTestVectors.length; i++)
{
String[] keyedTestVector = keyedTestVectors[i];
byte[] input = Hex.decode(keyedTestVector[0]);
digest.reset();
digest.update(input, 0, input.length);
byte[] hash = new byte[32];
digest.doFinal(hash, 0);
if (!areEqual(Hex.decode(keyedTestVector[2]), hash))
{
fail("BLAKE2s mismatch on test vector ",
keyedTestVector[2],
new String(Hex.encode(hash)));
}
}
}
public void testDigestWithKeyedTestVectorsAndRandomUpdate()
{
Blake2sDigest digest = new Blake2sDigest(Hex.decode(
keyedTestVectors[0][1]));
Random random = new Random();
for (int i = 0; i < 100; i++)
{
for (int j = 0; j != keyedTestVectors.length; j++)
{
String[] keyedTestVector = keyedTestVectors[j];
byte[] input = Hex.decode(keyedTestVector[0]);
if (input.length < 3)
{
continue;
}
digest.reset();
int pos = (random.nextInt() & 0xffff) % input.length;
if (pos > 0)
{
digest.update(input, 0, pos);
}
digest.update(input[pos]);
if (pos < (input.length - 1))
{
digest.update(input, pos + 1, input.length - (pos + 1));
}
byte[] hash = new byte[32];
digest.doFinal(hash, 0);
if (!areEqual(Hex.decode(keyedTestVector[2]), hash))
{
fail("BLAKE2s mismatch on test vector ",
keyedTestVector[2],
new String(Hex.encode(hash)));
}
}
}
}
private void testLengthConstruction()
{
try
{
new Blake2sDigest(-1);
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("BLAKE2s digest bit length must be a multiple of 8 and not greater than 256", e.getMessage());
}
try
{
new Blake2sDigest(9);
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("BLAKE2s digest bit length must be a multiple of 8 and not greater than 256", e.getMessage());
}
try
{
new Blake2sDigest(512);
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("BLAKE2s digest bit length must be a multiple of 8 and not greater than 256", e.getMessage());
}
try
{
new Blake2sDigest(null, -1, null, null);
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("Invalid digest length (required: 1 - 32)", e.getMessage());
}
try
{
new Blake2sDigest(null, 33, null, null);
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("Invalid digest length (required: 1 - 32)", e.getMessage());
}
}
private void testNullKeyVsUnkeyed()
{
byte[] abc = Strings.toByteArray("abc");
for (int i = 1; i != 32; i++)
{
Blake2sDigest dig1 = new Blake2sDigest(i * 8);
Blake2sDigest dig2 = new Blake2sDigest(null, i, null, null);
byte[] out1 = new byte[i];
byte[] out2 = new byte[i];
dig1.update(abc, 0, abc.length);
dig2.update(abc, 0, abc.length);
dig1.doFinal(out1, 0);
dig2.doFinal(out2, 0);
isTrue(Arrays.areEqual(out1, out2));
}
}
public void testReset()
{
// Generate a non-zero key
byte[] key = new byte[32];
for (byte i = 0; i < key.length; i++)
{
key[i] = i;
}
// Generate some non-zero input longer than the key
byte[] input = new byte[key.length + 1];
for (byte i = 0; i < input.length; i++)
{
input[i] = i;
}
// Hash the input
Blake2sDigest digest = new Blake2sDigest(key);
digest.update(input, 0, input.length);
byte[] hash = new byte[digest.getDigestSize()];
digest.doFinal(hash, 0);
// Create a second instance, hash the input without calling doFinal()
Blake2sDigest digest1 = new Blake2sDigest(key);
digest1.update(input, 0, input.length);
// Reset the second instance and hash the input again
digest1.reset();
digest1.update(input, 0, input.length);
byte[] hash1 = new byte[digest.getDigestSize()];
digest1.doFinal(hash1, 0);
// The hashes should be identical
if (!areEqual(hash, hash1))
{
fail("BLAKE2s mismatch on test vector ",
new String(Hex.encode(hash)),
new String(Hex.encode(hash1)));
}
}
// Self-test routine from https://tools.ietf.org/html/rfc7693#appendix-E
private static final String SELF_TEST_RESULT =
"6A411F08CE25ADCDFB02ABA641451CEC53C598B24F4FC787FBDC88797F4C1DFE";
private static final int[] SELF_TEST_DIGEST_LEN = {16, 20, 28, 32};
private static final int[] SELF_TEST_INPUT_LEN = {0, 3, 64, 65, 255, 1024};
private static byte[] selfTestSequence(int len, int seed)
{
int a = 0xDEAD4BAD * seed;
int b = 1;
int t;
byte[] out = new byte[len];
for (int i = 0; i < len; i++)
{
t = a + b;
a = b;
b = t;
out[i] = (byte)((t >> 24) & 0xFF);
}
return out;
}
public void runSelfTest()
{
Blake2sDigest testDigest = new Blake2sDigest();
byte[] md = new byte[32];
for (int i = 0; i < 4; i++)
{
int outlen = SELF_TEST_DIGEST_LEN[i];
for (int j = 0; j < 6; j++)
{
int inlen = SELF_TEST_INPUT_LEN[j];
// unkeyed hash
byte[] in = selfTestSequence(inlen, inlen);
Blake2sDigest unkeyedDigest = new Blake2sDigest(outlen * 8);
unkeyedDigest.update(in, 0, inlen);
unkeyedDigest.doFinal(md, 0);
// hash the hash
testDigest.update(md, 0, outlen);
// keyed hash
byte[] key = selfTestSequence(outlen, outlen);
Blake2sDigest keyedDigest = new Blake2sDigest(key, outlen, null,
null);
keyedDigest.update(in, 0, inlen);
keyedDigest.doFinal(md, 0);
// hash the hash
testDigest.update(md, 0, outlen);
}
}
byte[] hash = new byte[32];
testDigest.doFinal(hash, 0);
if (!areEqual(Hex.decode(SELF_TEST_RESULT), hash))
{
fail("BLAKE2s mismatch on test vector ",
SELF_TEST_RESULT,
new String(Hex.encode(hash)));
}
}
public void performTest()
throws Exception
{
testDigestWithKeyedTestVectors();
testDigestWithKeyedTestVectorsAndRandomUpdate();
testReset();
runSelfTest();
testNullKeyVsUnkeyed();
testLengthConstruction();
}
public static void main(String[] args)
throws Exception
{
runTest(new Blake2sDigestTest());
}
}