public void init()

in sdk1/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/internal/Hkdf.java [119:140]

• 20 lines of code
• 4 McCabe index (conditional complexity)

  public void init(final byte[] ikm, final byte[] salt) {
    byte[] realSalt = (salt == null) ? EMPTY_ARRAY : salt.clone();
    byte[] rawKeyMaterial = EMPTY_ARRAY;
    try {
      Mac extractionMac = Mac.getInstance(algorithm, provider);
      if (realSalt.length == 0) {
        realSalt = new byte[extractionMac.getMacLength()];
        Arrays.fill(realSalt, (byte) 0);
      }
      extractionMac.init(new SecretKeySpec(realSalt, algorithm));
      rawKeyMaterial = extractionMac.doFinal(ikm);
      SecretKeySpec key = new SecretKeySpec(rawKeyMaterial, algorithm);
      Arrays.fill(rawKeyMaterial, (byte) 0); // Zeroize temporary array
      unsafeInitWithoutKeyExtraction(key);
    } catch (GeneralSecurityException e) {
      // We've already checked all of the parameters so no exceptions
      // should be possible here.
      throw new RuntimeException("Unexpected exception", e);
    } finally {
      Arrays.fill(rawKeyMaterial, (byte) 0); // Zeroize temporary array
    }
  }