io.neow3j.crypto

Class Hash

java.lang.Object

io.neow3j.crypto.Hash

public class Hash
extends java.lang.Object

Cryptographic hash functions.

Method Summary

Modifier and Type	Method and Description
static byte[]	hash256(byte[] input) Applies SHA-256 twice to the input and returns the result.
static byte[]	hash256(byte[] input, int offset, int length) Applies SHA-256 twice to the slice of the given length of the input, starting at the given offset.
static byte[]	hmacSha512(byte[] key, byte[] input) Generates HMAC SHA-512 digest for the given input with the given key.
static byte[]	ripemd160(byte[] input) Generates RipeMD-160 digest for the given input.
static java.lang.String	ripemd160(java.lang.String hexInput) RipeMD-160 hash function.
static byte[]	sha256(byte[] input) Generates SHA-256 digest for the given input.
static byte[]	sha256(byte[] input, int offset, int length) Generates SHA-256 digest for the given input.
static byte[]	sha256AndThenRipemd160(byte[] input) Performs a SHA256 followed by a RIPEMD160.
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

sha256AndThenRipemd160

public static byte[] sha256AndThenRipemd160(byte[] input)

Performs a SHA256 followed by a RIPEMD160.

Parameters:

input - byte array with the input to be hashed

Returns:

hash value as byte array

ripemd160

public static java.lang.String ripemd160(java.lang.String hexInput)

RipeMD-160 hash function.

Parameters:

hexInput - hex encoded input data with optional 0x prefix

Returns:

hash value as hex encoded string

ripemd160

public static byte[] ripemd160(byte[] input)

Generates RipeMD-160 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 RipeMD160 provider

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

hmacSha512

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

Generates HMAC SHA-512 digest for the given input with the given key.

Parameters:

key - The key parameter

input - The input to digest

Returns:

The hash value for the given input

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

sha256

public static byte[] sha256(byte[] input,
                            int offset,
                            int length)

Generates SHA-256 digest for the given input.

Parameters:

input - binary encoded input data

offset - of start of data

length - of data

Returns:

The hash value for the given input

Throws:

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

hash256

public static byte[] hash256(byte[] input)

Applies SHA-256 twice to the input and returns the result.

Neo uses the name hash256 for hashes created in this way.

Parameters:

input - The input to hash.

Returns:

the hash value for the given input.

hash256

public static byte[] hash256(byte[] input,
                             int offset,
                             int length)

Applies SHA-256 twice to the slice of the given length of the input, starting at the given offset.

Neo uses the name hash256 for hashes created in this way.

Parameters:

input - The input to hash.

offset - The offset at which the slice starts.

length - The length of the slice to hash.

Returns:

the hash value.