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Created a single function at the Util static class that exposes interfaces for SHA1, RIPEMD160 & SHA-256 hash functions

develop
Nelson R. Perez 2019-07-11 13:21:30 -05:00
parent 12ce0ef276
commit d953dae81b
1 changed files with 44 additions and 1 deletions
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45
graphenej/src/main/java/cy/agorise/graphenej/Util.java
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@ -2,14 +2,25 @@ package cy.agorise.graphenej;
import com.google.common.primitives.Bytes;
import com.google.common.primitives.UnsignedLong;
import org.spongycastle.crypto.DataLengthException;
import org.spongycastle.crypto.InvalidCipherTextException;
import org.spongycastle.crypto.digests.GeneralDigest;
import org.spongycastle.crypto.digests.RIPEMD160Digest;
import org.spongycastle.crypto.digests.SHA1Digest;
import org.spongycastle.crypto.digests.SHA256Digest;
import org.spongycastle.crypto.engines.AESFastEngine;
import org.spongycastle.crypto.modes.CBCBlockCipher;
import org.spongycastle.crypto.paddings.PaddedBufferedBlockCipher;
import org.spongycastle.crypto.params.KeyParameter;
import org.spongycastle.crypto.params.ParametersWithIV;
import org.tukaani.xz.*;
import org.tukaani.xz.CorruptedInputException;
import org.tukaani.xz.FinishableOutputStream;
import org.tukaani.xz.LZMA2Options;
import org.tukaani.xz.LZMAInputStream;
import org.tukaani.xz.LZMAOutputStream;
import org.tukaani.xz.XZInputStream;
import org.tukaani.xz.XZOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
@ -378,4 +389,36 @@ public class Util {
public static long toBase(double value, int precision){
return (long) (value * Math.pow(10, precision));
}
/**
* Creates a hash for HTLC operations.
*
* @param preimage The data we want to operate on.
* @param hashType The type of hash.
* @return The hash.
* @throws NoSuchAlgorithmException
*/
public static byte[] htlcHash(byte[] preimage, HtlcHashType hashType) throws NoSuchAlgorithmException {
byte[] out = null;
GeneralDigest digest = null;
switch(hashType){
case RIPEMD160:
digest = new RIPEMD160Digest();
out = new byte[20];
break;
case SHA1:
digest = new SHA1Digest();
out = new byte[20];
break;
case SHA256:
digest = new SHA256Digest();
out = new byte[32];
break;
default:
throw new IllegalArgumentException("Not supported hash function!");
}
digest.update(preimage, 0, preimage.length);
digest.doFinal(out, 0);
return out;
}
}