Java Code Examples for org.bouncycastle.crypto.digests.RIPEMD160Digest#doFinal()

/**
 * 根据公钥生成比特币钱包地址
 * @param publicKey
 * @return
 */
public static String getAddress(byte[] publicKey) {

	//1. 计算公钥的 SHA-256 哈希值
	byte[] sha256Bytes = Hash.sha3(publicKey);
	//2. 取上一步结果，计算 RIPEMD-160 哈希值
	RIPEMD160Digest digest = new RIPEMD160Digest();
	digest.update(sha256Bytes, 0, sha256Bytes.length);
	byte[] ripemd160Bytes = new byte[digest.getDigestSize()];
	digest.doFinal(ripemd160Bytes, 0);
	//3. 取上一步结果，前面加入地址版本号（主网版本号“0x00”）
	byte[] networkID = new BigInteger("00", 16).toByteArray();
	byte[] extendedRipemd160Bytes = ByteUtils.add(networkID, ripemd160Bytes);
	//4. 取上一步结果，计算 SHA-256 哈希值
	byte[] oneceSha256Bytes = Hash.sha3(extendedRipemd160Bytes);
	//5. 取上一步结果，再计算一下 SHA-256 哈希值
	byte[] twiceSha256Bytes = Hash.sha3(oneceSha256Bytes);
	//6. 取上一步结果的前4个字节（8位十六进制）
	byte[] checksum = new byte[4];
	System.arraycopy(twiceSha256Bytes, 0, checksum, 0, 4);
	//7. 把这4个字节加在第5步的结果后面，作为校验
	byte[] binaryAddressBytes = ByteUtils.add(extendedRipemd160Bytes, checksum);
	//8. 把结果用 Base58 编码算法进行一次编码
	return Base58.encode(binaryAddressBytes);
}
 

/**
 * Digesting input byte[] to RIPEMD160 format
 *
 * @param input - input byte[]
 * @return RIPEMD160 format
 */
@NotNull
private static byte[] digestRIPEMD160(@NotNull byte[] input) {
    RIPEMD160Digest digest = new RIPEMD160Digest();
    byte[] output = new byte[digest.getDigestSize()];
    digest.update(input, 0, input.length);
    digest.doFinal(output, 0);

    return output;
}
 

/**
 * 计算公钥的 RIPEMD160 Hash值
 *
 * @param pubKey 公钥
 * @return ipeMD160Hash(sha256 ( pubkey))
 */
public static byte[] ripeMD160Hash(byte[] pubKey) {
    //1. 先对公钥做 sha256 处理
    byte[] shaHashedKey = DigestUtils.sha256(pubKey);
    RIPEMD160Digest ripemd160 = new RIPEMD160Digest();
    ripemd160.update(shaHashedKey, 0, shaHashedKey.length);
    byte[] output = new byte[ripemd160.getDigestSize()];
    ripemd160.doFinal(output, 0);
    return output;
}
 

/**
 * Calculates RIPEMD160(SHA256(input)). This is used in Address calculations.
 *
 * @param input 字节数组
 */
public static byte[] sha256hash160(byte[] input) {
    byte[] sha256 = Sha256Hash.hash(input);
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(sha256, 0, sha256.length);
    byte[] out = new byte[20];
    digest.doFinal(out, 0);
    return out;
}
 

private static byte[] ripemd160(byte[] data) {
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(data, 0, data.length);
    byte[] out = new byte[20];
    digest.doFinal(out, 0);
    return out;
}
 

public static byte[] sha256hash160(byte[] input) {
    byte[] sha256 = sha256(input);
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(sha256, 0, sha256.length);
    byte[] out = new byte[20];
    digest.doFinal(out, 0);
    return out;
}
 

/**
 * Calculates RIPEMD160(SHA256(input)). This is used in Address calculations.
 */
public static byte[] sha256hash160(byte[] input) {
    byte[] sha256 = Sha256Hash.hash(input);
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(sha256, 0, sha256.length);
    byte[] out = new byte[20];
    digest.doFinal(out, 0);
    return out;
}
 

public static Hash ripemd160(byte[] bytes) {
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(bytes, 0, bytes.length);
    byte[] ripmemdHash = new byte[20];
    digest.doFinal(ripmemdHash, 0);
    return new Hash(ripmemdHash);
}
 

public static byte[] sha256hash160(byte[] input) {
    byte[] sha256 = sha256(input);
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(sha256, 0, sha256.length);
    byte[] out = new byte[20];
    digest.doFinal(out, 0);
    return out;
}
 

/**
 * generate bitcoin privatekey, publickey and address.
 *
 * @param childPrivateKey
 */
private static void bitcoinAddress(ExtendedPrivateKey childPrivateKey) {
    // 获取比特币私钥
    String privateKey = childPrivateKey.getPrivateKey();
    // 加80前缀和01后缀
    String rk = "80" + privateKey + "01";
    // 生成校验和
    byte[] checksum = Sha256.sha256(hexStringToByteArray(rk));
    checksum = Sha256.sha256(checksum);
    // 取校验和前4位（32bits）
    String end = String.valueOf(Hex.encodeHex(checksum)).substring(0, 8);
    rk = rk + end;
    // 进行base58编码
    String privateK = Base58.base58Encode(hexStringToByteArray(rk));


    // 获取比特币公钥
    String publicKey = childPrivateKey.neuter().getPublicKey();
    // 对公钥进行一次sha256
    byte[] pk256 = hexStringToByteArray(publicKey);
    pk256 = Sha256.sha256(pk256);
    // 进行ripe160加密（20位）
    RIPEMD160Digest digest = new RIPEMD160Digest();
    digest.update(pk256, 0, pk256.length);
    byte[] ripemd160Bytes = new byte[digest.getDigestSize()];
    digest.doFinal(ripemd160Bytes, 0);
    // 加00前缀（比特币主网）变成21位
    byte[] extendedRipemd160Bytes = hexStringToByteArray("00" + String.valueOf(Hex.encodeHex(ripemd160Bytes)));
    // 计算校验和
    checksum = Sha256.sha256(extendedRipemd160Bytes);
    checksum = Sha256.sha256(checksum);
    // 加校验和前4位，变成25位
    String pk = String.valueOf(Hex.encodeHex(extendedRipemd160Bytes)) + String.valueOf(Hex.encodeHex(checksum)).substring(0, 8);
    // base58加密
    String address = Base58.base58Encode(hexStringToByteArray(pk));

    System.out.println("bitcoin privateKey:" + privateK);
    System.out.println("bitcoin publicKey:" + publicKey);
    System.out.println("bitcoin address:" + address);

    generateSegwitAddress(address);
}