org.spongycastle.crypto.digests.SHA512Digest Java Examples

private private_key derive_private_key(String strWifKey, int nSeqNumber) {
    String strData = strWifKey + " " + nSeqNumber;
    byte[] bytesBuffer = strData.getBytes();
    SHA512Digest digest = new SHA512Digest();
    digest.update(bytesBuffer, 0, bytesBuffer.length);

    byte[] out = new byte[64];
    digest.doFinal(out, 0);

    SHA256Digest digest256 = new SHA256Digest();
    byte[] outSeed = new byte[32];
    digest256.update(out, 0, out.length);
    digest.doFinal(outSeed, 0);

    return new private_key(outSeed);
}
 

private private_key derive_private_key(String strWifKey, int nSeqNumber) {
    String strData = strWifKey + " " + nSeqNumber;
    byte[] bytesBuffer = strData.getBytes();
    SHA512Digest digest = new SHA512Digest();
    digest.update(bytesBuffer, 0, bytesBuffer.length);

    byte[] out = new byte[64];
    digest.doFinal(out, 0);

    SHA256Digest digest256 = new SHA256Digest();
    byte[] outSeed = new byte[32];
    digest256.update(out, 0, out.length);
    digest.doFinal(outSeed, 0);

    return new private_key(outSeed);
}
 

public static sha512_object create_from_string(String strContent) {
    SHA512Digest digest = new SHA512Digest();
    byte[] bytePassword = strContent.getBytes();
    digest.update(bytePassword, 0, bytePassword.length);

    byte[] byteHash = new byte[64];
    digest.doFinal(byteHash, 0);

    sha512_object sha512Object = new sha512_object();
    System.arraycopy(byteHash, 0, sha512Object.hash, 0, byteHash.length);

    return sha512Object;
}
 

public static sha512_object create_from_byte_array(byte[] byteArray, int offset, int length) {
    SHA512Digest digest = new SHA512Digest();
    digest.update(byteArray, offset, length);

    byte[] byteHash = new byte[64];
    digest.doFinal(byteHash, 0);

    sha512_object sha512Object = new sha512_object();
    System.arraycopy(byteHash, 0, sha512Object.hash, 0, byteHash.length);

    return sha512Object;
}
 

public static sha512_object create_from_string(String strContent) {
    SHA512Digest digest = new SHA512Digest();
    byte[] bytePassword = strContent.getBytes();
    digest.update(bytePassword, 0, bytePassword.length);

    byte[] byteHash = new byte[64];
    digest.doFinal(byteHash, 0);

    sha512_object sha512Object = new sha512_object();
    System.arraycopy(byteHash, 0, sha512Object.hash, 0, byteHash.length);

    return sha512Object;
}
 

public static sha512_object create_from_byte_array(byte[] byteArray, int offset, int length) {
    SHA512Digest digest = new SHA512Digest();
    digest.update(byteArray, offset, length);

    byte[] byteHash = new byte[64];
    digest.doFinal(byteHash, 0);

    sha512_object sha512Object = new sha512_object();
    System.arraycopy(byteHash, 0, sha512Object.hash, 0, byteHash.length);

    return sha512Object;
}
 

public static sha512_object create_from_string(String strContent) {
    SHA512Digest digest = new SHA512Digest();
    byte[] bytePassword = strContent.getBytes();
    digest.update(bytePassword, 0, bytePassword.length);

    byte[] byteHash = new byte[64];
    digest.doFinal(byteHash, 0);

    sha512_object sha512Object = new sha512_object();
    System.arraycopy(byteHash, 0, sha512Object.hash, 0, byteHash.length);

    return sha512Object;
}
 

public static sha512_object create_from_byte_array(byte[] byteArray, int offset, int length) {
    SHA512Digest digest = new SHA512Digest();
    digest.update(byteArray, offset, length);

    byte[] byteHash = new byte[64];
    digest.doFinal(byteHash, 0);

    sha512_object sha512Object = new sha512_object();
    System.arraycopy(byteHash, 0, sha512Object.hash, 0, byteHash.length);

    return sha512Object;
}
 

public static byte[] generateHmac512(byte[] key, String msg) throws UnsupportedEncodingException {

		HMac hmac = new HMac(new SHA512Digest());
		byte[] result = new byte[hmac.getMacSize()];
		byte[] msgAry = msg.getBytes("UTF-8");
		hmac.init(new KeyParameter(key));
		hmac.reset();
		hmac.update(msgAry, 0, msgAry.length);
		hmac.doFinal(result, 0);
		return result;
	}
 

static HMac createHmacSha512Digest(byte[] key) {
    SHA512Digest digest = new SHA512Digest();
    HMac hMac = new HMac(digest);
    hMac.init(new KeyParameter(key));
    return hMac;
}
 

static HMac createHmacSha512Digest(byte[] key) {
    SHA512Digest digest = new SHA512Digest();
    HMac hMac = new HMac(digest);
    hMac.init(new KeyParameter(key));
    return hMac;
}
 

static HMac createHmacSha512Digest(byte[] key) {
    SHA512Digest digest = new SHA512Digest();
    HMac hMac = new HMac(digest);
    hMac.init(new KeyParameter(key));
    return hMac;
}
 

static HMac createHmacSha512Digest(byte[] key) {
    SHA512Digest digest = new SHA512Digest();
    HMac hMac = new HMac(digest);
    hMac.init(new KeyParameter(key));
    return hMac;
}
 

/**
 * To create a binary seed from the mnemonic, we use the PBKDF2 function with a
 * mnemonic sentence (in UTF-8 NFKD) used as the password and the string "mnemonic"
 * + passphrase (again in UTF-8 NFKD) used as the salt. The iteration count is set
 * to 2048 and HMAC-SHA512 is used as the pseudo-random function. The length of the
 * derived key is 512 bits (= 64 bytes).
 *
 * @param mnemonic The input mnemonic which should be 128-160 bits in length containing
 *                 only valid words
 * @param passphrase The passphrase which will be used as part of salt for PBKDF2
 *                   function
 * @return Byte array representation of the generated seed
 */
public static byte[] generateSeed(String mnemonic, String passphrase) {
    validateMnemonic(mnemonic);
    passphrase = passphrase == null ? "" : passphrase;

    String salt = String.format("mnemonic%s", passphrase);
    PKCS5S2ParametersGenerator gen = new PKCS5S2ParametersGenerator(new SHA512Digest());
    gen.init(mnemonic.getBytes(Charset.forName("UTF-8")), salt.getBytes(Charset.forName("UTF-8")), SEED_ITERATIONS);

    return ((KeyParameter) gen.generateDerivedParameters(SEED_KEY_SIZE)).getKey();
}