引用this，我必须使用算法 AGCM256-KW 进行加密。我正在使用Java密码学，但未找到任何此类算法。我发现的最接近的是 AES_256 / GCM / NoPadding ，但是它没有KW(密钥包装)。
这是我的测试代码
public void testEncryption(String algo) {
String shared_secret = "LyQnklSrxsk3Ch2+AHi9HoDW@//x1LwM123QP/ln";
try {
// Step 1 - Create SHA-256 digest of the shared key
MessageDigest md = MessageDigest.getInstance("SHA-256");
byte[] digest = md.digest(shared_secret.getBytes("UTF-8"));
// Step 2 - generate a 256 bit Content Encryption Key(CEK)
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(256);
SecretKey cek = kg.generateKey();
// Step 3 - encrypt the CEK using 256 bit digest generated in Step 1
// and 96 bit random IV. Algorithm should be
// random 96 bit Initialize Vector
SecureRandom random = new SecureRandom();
// byte iv[] = new byte[96];
// random.nextBytes(iv);
byte iv[] = random.generateSeed(96);
System.out.println("IV: " + toBase64(iv) + " length: " + iv.length);
IvParameterSpec ivspec = new IvParameterSpec(iv);
GCMParameterSpec gspec = new GCMParameterSpec(96, iv);
// encrypt
Cipher cipher = Cipher.getInstance(algo);
System.out.println(String.format("CEK Cipher alg:%S provider:%S", cipher.getAlgorithm(),
cipher.getProvider().getName()));
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(digest, "AES"), gspec);
byte[] result = cipher.doFinal(cek.getEncoded());
System.out.println(String.format("Encrypted CEK :%S", toBase64(result)));
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidKeyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidAlgorithmParameterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (BadPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
更新1
我想我可以使用jose4j库，该库具有JWE的API。
参考方案
是的，Visa令牌服务似乎正在使用JWE(现在为RFC 7516)，因此您可以为此使用jose4j。这是一些示例代码，显示了使用A256GCMKW和AGCM256使用JWE加密和解密某些内容:
// shared secret hashed to key from your example
String shared_secret = "LyQnklSrxsk3Ch2+AHi9HoDW@//x1LwM123QP/ln";
MessageDigest md = MessageDigest.getInstance("SHA-256");
byte[] digest = md.digest(shared_secret.getBytes("UTF-8"));
JsonWebEncryption jwe = new JsonWebEncryption();
// A256GCMKW for key wrap
jwe.setAlgorithmHeaderValue(KeyManagementAlgorithmIdentifiers.A256GCMKW);
// A256GCM for content encryption
jwe.setEncryptionMethodHeaderParameter(ContentEncryptionAlgorithmIdentifiers.AES_256_GCM);
// the key (from above)
jwe.setKey(new SecretKeySpec(digest, "AES"));
// whatever content you want to encrypt
jwe.setPayload("some important content to be encrypted and integrity protected");
// Produce the JWE compact serialization, which is where the actual encryption is done.
// The JWE compact serialization consists of five base64url encoded parts
// combined with a dot ('.') character in the general format of
// <header>.<encrypted key>.<initialization vector>.<ciphertext>.<authentication tag>
String serializedJwe = jwe.getCompactSerialization();
// Do something with the JWE. Like send it to some other party over the clouds
// and through the interwebs.
System.out.println("JWE compact serialization: " + serializedJwe);
// That other party, the receiver, can then use JsonWebEncryption to decrypt the message.
JsonWebEncryption receiverJwe = new JsonWebEncryption();
// Set the compact serialization on new Json Web Encryption object
receiverJwe.setCompactSerialization(serializedJwe);
// Symmetric encryption, like we are doing here, requires that both parties have the same key.
// The key will have had to have been securely exchanged out-of-band somehow.
receiverJwe.setKey(new SecretKeySpec(digest, "AES"));
// Get the message that was encrypted in the JWE. This step performs the actual decryption steps.
String plaintext = receiverJwe.getPlaintextString();
// And do whatever you need to do with the clear text message.
System.out.println("plaintext: " + plaintext);
如何用'\'替换单个'\\'？当我运行replaceAll()时，我收到此错误消息。Exception in thread "main" java.util.regex.PatternSyntaxException: Unexpected internal error near index 1 \ …
Java-如何将此字符串转换为日期？ - java我从服务器收到此消息，我不明白T和Z的含义，2012-08-24T09:59:59Z将此字符串转换为Date对象的正确SimpleDateFormat模式是什么？ java大神给出的解决方案 这是ISO 8601标准。您可以使用SimpleDateFormat simpleFormat = new SimpleDateFormat("yyyy-MM…
错误:任务':app:lintVitalRelease'的执行失败，任何人都可以解决吗？ - java为什么我收到此错误，我尝试清理和重建应用程序并制作应用程序发布为真，并且出现相同的错误 错误:任务':app:lintVitalRelease'的执行失败。 java.lang.IllegalStateException:预期为BEGIN_ARRAY，但位于第1行第1列路径$ apply plugin: 'com.android.applicati…
Java:我可以在Hashmaps中使用数组吗？ - java我可以在Hashmaps中使用数组吗？如果是这样，则声明这种哈希图的确切语法是什么？谢谢 参考方案 数组也是对象。甚至像int[]这样的原始数组。Map<String,String[]> map = new HashMap<String,String[]>();
为什么`if(guess!='a'|| guess!='A'||…)`不起作用？ - javaImprove this question 这是我的代码，我知道if语句真的很长，代码可能会更高效，但是我只是想知道答案，因为它使我发疯。while (whileloop == 1) { if (guess != 'a' || guess != 'A' || guess != 'b' || gues…