org.web3j.crypto

Class Hash

java.lang.Object

org.web3j.crypto.Hash

public class Hash
extends java.lang.Object

Cryptographic hash functions.

Method Summary

Modifier and Type	Method and Description
static byte[]	blake2b256(byte[] input) Blake2-256 hash function.
static byte[]	hash(byte[] input, java.lang.String algorithm) Generates a digest for the given input.
static byte[]	hmacSha512(byte[] key, byte[] input)
static byte[]	sha256(byte[] input) Generates SHA-256 digest for the given input.
static byte[]	sha256hash160(byte[] input)
static byte[]	sha3(byte[] input) Keccak-256 hash function.
static byte[]	sha3(byte[] input, int offset, int length) Keccak-256 hash function.
static java.lang.String	sha3(java.lang.String hexInput) Keccak-256 hash function.
static java.lang.String	sha3String(java.lang.String utf8String) Keccak-256 hash function that operates on a UTF-8 encoded String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

hash

public static byte[] hash(byte[] input,
                          java.lang.String algorithm)

Generates a digest for the given input.

Parameters:

input - The input to digest

algorithm - The hash algorithm to use

Returns:

The hash value for the given input

Throws:

java.lang.RuntimeException - If we couldn't find any provider for the given algorithm

sha3

public static java.lang.String sha3(java.lang.String hexInput)

Keccak-256 hash function.

Parameters:

hexInput - hex encoded input data with optional 0x prefix

Returns:

hash value as hex encoded string

sha3

public static byte[] sha3(byte[] input,
                          int offset,
                          int length)

Keccak-256 hash function.

Parameters:

input - binary encoded input data

offset - of start of data

length - of data

Returns:

hash value

sha3

public static byte[] sha3(byte[] input)

Keccak-256 hash function.

Parameters:

input - binary encoded input data

Returns:

hash value

sha3String

public static java.lang.String sha3String(java.lang.String utf8String)

Keccak-256 hash function that operates on a UTF-8 encoded String.

Parameters:

utf8String - UTF-8 encoded string

Returns:

hash value as hex encoded string

sha256

public static byte[] sha256(byte[] input)

Generates SHA-256 digest for the given input.

Parameters:

input - The input to digest

Returns:

The hash value for the given input

Throws:

java.lang.RuntimeException - If we couldn't find any SHA-256 provider

hmacSha512

public static byte[] hmacSha512(byte[] key,
                                byte[] input)

sha256hash160

public static byte[] sha256hash160(byte[] input)

blake2b256

public static byte[] blake2b256(byte[] input)

Blake2-256 hash function.

Parameters:

input - binary encoded input data

Returns:

hash value