java - xws-security(webservices-rt)中的GCM加解密

Question

我已经使用 JDK8 在 xws-security (EncryptionProcessor.java) 中成功实现了对 GCM 加密的支持，并针对其他系统进行了测试。但是我有解密问题。第一个问题如下java.security.InvalidAlgorithmParameterException:不支持的参数:javax.crypto.spec.IvParameterSpec。我通过将初始化 vector (iv) 从 IvParameterSpec() 更改为 GCMParameterSpec() 解决了这个问题，如下所示(来自 DecryptionProcessor.java 的代码片段)

          try {
        String dataAlgorithm =  JCEMapper.translateURItoJCEID(tmp);
        decryptor = Cipher.getInstance(dataAlgorithm);

        //decryptor = Cipher.getInstance("DESede/CBC/ISO10126Padding");

        int ivLen = decryptor.getBlockSize();
        byte[] ivBytes = new byte[ivLen];

        System.arraycopy(cipherInput, 0, ivBytes, 0, ivLen);
        if (dataAlgorithm.matches(".*[gG][cC][mM].*$")) { // TK 03/09/2015 - probably needs more places for decrypting body stuff
          GCMParameterSpec iv = new GCMParameterSpec(ivLen * Byte.SIZE, ivBytes);
          decryptor.init(Cipher.DECRYPT_MODE, symmetricKey, iv);
        }
        else {
          IvParameterSpec iv = new IvParameterSpec(ivBytes);
          decryptor.init(Cipher.DECRYPT_MODE, symmetricKey, iv); <===== old line 761
        }

        cipherOutput = decryptor.doFinal(cipherInput, ivLen, cipherInput.length-ivLen);
      } catch (Exception e) {
        log.log(Level.SEVERE, "WSS1232.failedto.decrypt.attachment", e);
        throw new XWSSecurityException(e);
      }

我现在在调用 doFinal() 时遇到以下错误

    javax.crypto.AEADBadTagException: Tag mismatch!
    at com.sun.crypto.provider.GaloisCounterMode.decryptFinal(GaloisCounterMode.java:524)
    at com.sun.crypto.provider.CipherCore.finalNoPadding(CipherCore.java:1023)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:960)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:824)
    at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:436)
    at javax.crypto.Cipher.doFinal(Cipher.java:2223)
    at com.sun.xml.wss.impl.apachecrypto.DecryptionProcessor.decryptAttachment(DecryptionProcessor.java:775)

对此有任何意见/建议将不胜感激

Answer 1

修复了解密 SWA 附件 - 感谢 dave_thompson_085 的提示。代码调整如下

        try {
        String dataAlgorithm =  JCEMapper.translateURItoJCEID(tmp);
        decryptor = Cipher.getInstance(dataAlgorithm);

        //decryptor = Cipher.getInstance("DESede/CBC/ISO10126Padding");

        int ivLen = decryptor.getBlockSize();
        byte[] ivBytes = null; // = new byte[ivLen];

        if (dataAlgorithm.matches(".*[gG][cC][mM].*$")) { // TK 03/09/2015 - probably needs more places for decrypting body stuff
          ivLen = 12; // 12 for GCM - also see wss4j-2.1.2/ws-security-common/src/main/java/org/apache/wss4j/common/util/AttachmentUtils.java
          ivBytes = new byte[ivLen];
          System.arraycopy(cipherInput, 0, ivBytes, 0, ivLen);
          GCMParameterSpec iv = new GCMParameterSpec(16 * Byte.SIZE, ivBytes);
          decryptor.init(Cipher.DECRYPT_MODE, symmetricKey, iv);
        }
        else {
          ivBytes = new byte[ivLen];
          System.arraycopy(cipherInput, 0, ivBytes, 0, ivLen);
          IvParameterSpec iv = new IvParameterSpec(ivBytes);
          decryptor.init(Cipher.DECRYPT_MODE, symmetricKey, iv);
        }

        cipherOutput = decryptor.doFinal(cipherInput, ivLen, cipherInput.length-ivLen);
    } catch (Exception e) {
        log.log(Level.SEVERE, "WSS1232.failedto.decrypt.attachment", e);
        throw new XWSSecurityException(e);
    }

现在GCM XML元素解密也有类似的问题。稍后会跟进。