本文整理了Java中org.bouncycastle.crypto.digests.SHA256Digest.getDigestSize()方法的一些代码示例，展示了SHA256Digest.getDigestSize()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。SHA256Digest.getDigestSize()方法的具体详情如下：
包路径：org.bouncycastle.crypto.digests.SHA256Digest
类名称：SHA256Digest
方法名：getDigestSize

SHA256Digest.getDigestSize介绍

暂无

代码示例

代码示例来源：origin: puppetlabs/europa

private void validateDigest(String digest, byte[] encodedState) {
    SHA256Digest computedDigest = new SHA256Digest(encodedState);
    byte[] computedBytes = new byte[computedDigest.getDigestSize()];
    computedDigest.doFinal(computedBytes, 0);
    String computed = "sha256:" + printHexBinary(computedBytes);
    computed = computed.toLowerCase();
    if ( ! digest.equals(computed) ) {
      throw new RegistryError("Invalid digest, expected "+computed+", but got "+digest,
                  RegistryErrorCode.DIGEST_INVALID);
    }
  }
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

private static BigInteger deriveSessionKey(BigInteger keyingMaterial)
  {
    /*
     * You should use a secure key derivation function (KDF) to derive the session key.
     * 
     * For the purposes of this example, I'm just going to use a hash of the keying material.
     */
    SHA256Digest digest = new SHA256Digest();
    
    byte[] keyByteArray = keyingMaterial.toByteArray();
    
    byte[] output = new byte[digest.getDigestSize()];
    
    digest.update(keyByteArray, 0, keyByteArray.length);

    digest.doFinal(output, 0);

    return new BigInteger(output);
  }
}

代码示例来源：origin: redfish64/TinyTravelTracker

private static BigInteger deriveSessionKey(BigInteger keyingMaterial)
  {
    /*
     * You should use a secure key derivation function (KDF) to derive the session key.
     * 
     * For the purposes of this example, I'm just going to use a hash of the keying material.
     */
    SHA256Digest digest = new SHA256Digest();
    
    byte[] keyByteArray = keyingMaterial.toByteArray();
    
    byte[] output = new byte[digest.getDigestSize()];
    
    digest.update(keyByteArray, 0, keyByteArray.length);

    digest.doFinal(output, 0);

    return new BigInteger(output);
  }
}

代码示例来源：origin: org.opendaylight.usc/usc-channel-impl

static byte[] sha256DigestOf(byte[] input) {
  SHA256Digest d = new SHA256Digest();
  d.update(input, 0, input.length);
  byte[] result = new byte[d.getDigestSize()];
  d.doFinal(result, 0);
  return result;
}

代码示例来源：origin: io.github.in-toto/in-toto

private void collect(String filename) {
    FileInputStream file = null;
    try {
      file = new FileInputStream(filename);
    } catch (FileNotFoundException e) {
      throw new RuntimeException("The file " + filename + " couldn't be recorded");
    }
    SHA256Digest digest =  new SHA256Digest();
    byte[] result = new byte[digest.getDigestSize()];
    int length;
    try {
      while ((length = file.read(result)) != -1) {
        digest.update(result, 0, length);
      }
    } catch (IOException e) {
      throw new RuntimeException("The file " + filename + " couldn't be recorded");
    }
    digest.doFinal(result, 0);
    // We should be able to submit more hashes, but we will do sha256
    // only for the time being
    this.put("sha256", Hex.toHexString(result));
  }
}

代码示例来源：origin: io.github.in-toto/in-toto

/**
   * Returns the signer associated with the signing method for this key
   *
   * @return a Signer instance that can be used to sign or verify using
   * RSASSA-PSS
   */
  public Signer getSigner() {
    RSAEngine engine = new RSAEngine();
    try {
      engine.init(false, getPrivate());
    } catch (IOException e) {
      throw new RuntimeException(e.toString());
    }
    SHA256Digest digest = new SHA256Digest();
    return new PSSSigner(engine, digest, digest.getDigestSize());
  }
}

代码示例来源：origin: io.github.in-toto/in-toto

/**
 * Convenience method to obtain the keyid for this key
 *
 * @return the keyid for this key (Sha256 is baked in, for the time being)
 */
public String computeKeyId() {
  if (this.kpr == null)
    return null;
  byte[] JSONrepr = getJSONEncodeableFields();
  // initialize digest
  SHA256Digest digest =  new SHA256Digest();
  byte[] result = new byte[digest.getDigestSize()];
  digest.update(JSONrepr, 0, JSONrepr.length);
  digest.doFinal(result, 0);
  return Hex.toHexString(result);
}

代码示例来源：origin: stackoverflow.com

byte[] retValue = new byte[digester.getDigestSize()];
digester.update(key.getBytes(), 0, key.length());
digester.doFinal(retValue,0);

代码示例来源：origin: horrorho/LiquidDonkey

byte[] shared = Curve25519.create().agreement(otherPublicKey, myPrivateKey);
byte[] pad = new byte[]{0x00, 0x00, 0x00, 0x01};
byte[] hash = new byte[sha256.getDigestSize()];

代码示例来源：origin: horrorho/InflatableDonkey

public static Optional<byte[]> curve25519Unwrap(
      byte[] myPublicKey,
      byte[] myPrivateKey,
      byte[] otherPublicKey,
      byte[] wrappedKey) {

    SHA256Digest sha256 = new SHA256Digest();

    byte[] shared = Curve25519.agreement(otherPublicKey, myPrivateKey);
    logger.debug("-- curve25519Unwrap() - shared agreement: 0x{}", Hex.toHexString(shared));

    // Stripped down NIST SP 800-56A KDF.
    byte[] counter = new byte[]{0x00, 0x00, 0x00, 0x01};
    byte[] hash = new byte[sha256.getDigestSize()];

    sha256.reset();
    sha256.update(counter, 0, counter.length);
    sha256.update(shared, 0, shared.length);
    sha256.update(otherPublicKey, 0, otherPublicKey.length);
    sha256.update(myPublicKey, 0, myPublicKey.length);
    sha256.doFinal(hash, 0);

    logger.debug("-- curve25519Unwrap() - kek: {}", Hex.toHexString(hash));
    return RFC3394Wrap.unwrapAES(hash, wrappedKey);
  }
}