Example usage for org.apache.commons.codec.digest HmacUtils hmacSha512

Introduction

In this page you can find the example usage for org.apache.commons.codec.digest HmacUtils hmacSha512.

Prototype

public static byte[] hmacSha512(final String key, final String valueToDigest) 

Source Link

Document

Returns a HmacSHA512 Message Authentication Code (MAC) for the given key and value.

Usage

From source file:com.vmware.o11n.plugin.crypto.service.CryptoDigestService.java

/**
 * HmacSHA512/*from   www.  j av  a 2 s  .  c o m*/
 *
 * @param keyB64 Secret key Base64 encoded
 * @param dataB64 Data to sign Base64 encoded
 * @return HmacSha512 MAC for the given key and data Base64 encoded
 */
public String hmacSha512(String keyB64, String dataB64) {
    validateB64(keyB64);
    validateB64(dataB64);
    final byte[] key = Base64.decodeBase64(keyB64);
    final byte[] data = Base64.decodeBase64(dataB64);

    return Base64.encodeBase64String(HmacUtils.hmacSha512(key, data));
}

---

From source file:se.sawano.java.security.otp.rfc6238.ExploratoryTests.java

@Test
public void should_perform_TOTP() throws Exception {
    System.out.println("--> " + hexStr2Bytes(seed).length);

    final ReferenceDataRepository testData = new ReferenceDataRepository().init();

    final ReferenceDataRepository.ReferenceData data = testData
            .getForMode(ReferenceDataRepository.ReferenceData.Mode.SHA512);

    assertArrayEquals(hexStr2Bytes(seed64), secret().value());

    final int numberOfDigitsInCode = 8;
    final long T0 = ReferenceDataRepository.T0.toEpochMilli();
    final long stepSize = ReferenceDataRepository.TIME_STEP.toMillis();
    final long T = (data.time.toEpochMilli() - T0) / stepSize; // Number of steps

    final String hexT = StringUtils.leftPad(Long.toHexString(T), 16, '0');

    System.out.println("Thex=" + hexT);
    assertEquals(data.hexTime, hexT);/*from   w  ww  . java2s . com*/

    final byte[] hexTBytes = Hex.decodeHex(hexT.toCharArray());
    final byte[] hextBytes2 = hexStr2Bytes(hexT);
    assertArrayEquals(hextBytes2, hexTBytes);

    final byte[] hashBytes = HmacUtils.hmacSha512(secret().value(), hexTBytes);
    System.out.println(hashBytes.length);

    final int binary = truncate(hashBytes);

    int otp = binary % DIGITS_POWER[numberOfDigitsInCode];

    final String totpString = StringUtils.leftPad(Integer.toString(otp), numberOfDigitsInCode, '0');
    System.out.println(totpString);
    assertEquals(data.totp, totpString);
}

---