public class Hash {
private Hash() { }
/**
* Keccak-256 hash function.
*
* @param hexInput hex encoded input data with optional 0x prefix
* @return hash value as hex encoded string
*/
public static String sha3(String hexInput) {
byte[] bytes = Numeric.hexStringToByteArray(hexInput);
byte[] result = sha3(bytes);
return Numeric.toHexString(result);
}
public static String sha3String(byte[] input) {
return DigestUtils.sha256Hex(input);
}
/**
* Keccak-256 hash function.
*
* @param input binary encoded input data
* @param offset of start of data
* @param length of data
* @return hash value
*/
public static byte[] sha3(byte[] input, int offset, int length) {
Keccak.DigestKeccak kecc = new Keccak.Digest256();
kecc.update(input, offset, length);
return kecc.digest();
}
/**
* Keccak-256 hash function.
*
* @param input binary encoded input data
* @return hash value
*/
public static byte[] sha3(byte[] input) {
return sha3(input, 0, input.length);
}
/**
* Keccak-256 hash function that operates on a UTF-8 encoded String.
*
* @param utf8String UTF-8 encoded string
* @return hash value as hex encoded string
*/
public static String sha3String(String utf8String) {
return Numeric.toHexString(sha3(utf8String.getBytes(StandardCharsets.UTF_8)));
}
/**
* Generates SHA-256 digest for the given {@code input}.
*
* @param input The input to digest
* @return The hash value for the given input
* @throws RuntimeException If we couldn't find any SHA-256 provider
*/
public static byte[] sha256(byte[] input) {
try {
MessageDigest digest = MessageDigest.getInstance("SHA-256");
return digest.digest(input);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Couldn't find a SHA-256 provider", e);
}
}
}
hash 工具类
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转载自blog.csdn.net/qq_39361915/article/details/105765503
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