将 .Net RSA xml 密钥移植到 Java
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Porting .Net RSA xml keys to Java
提问by dvl
I have private and public keys from the .Net system in the xml format. I have to use this keys to perform encryption/decryption in Java. Is there any way to do it?
我有来自 .Net 系统的 xml 格式的私钥和公钥。我必须使用此密钥在 Java 中执行加密/解密。有什么办法吗？
Public key looks something like this:
公钥看起来像这样：
<RSAKeyValue>
<Modulus>jHIxcGzzpByFv...pvhxFnP0ssmlBfMALis</Modulus>
<Exponent>AQAB</Exponent>
</RSAKeyValue>
Private key:
私钥：
<RSAKeyValue>
<Modulus>4hjg1ibWXHIlH...ssmlBfMAListzrgk=</Modulus>
<Exponent>AQAB</Exponent>
<P>8QZCtrmJcr9uW7VRex+diH...jLHV5StmuBs1+vZZAQ==</P>
<Q>8CUvJTv...yeDszMWNCQ==</Q>
<DP>elh2Nv...cygE3657AQ==</DP>
<DQ>MBUh5XC...+PfiMfX0EQ==</DQ>
<InverseQ>oxvsj4WCbQ....LyjggXg==</InverseQ>
<D>KrhmqzAVasx...uxQ5VGZmZ6yOAE=</D>
</RSAKeyValue>
I have written a bit of code to encrypt data but I am not sure if its correct.
我写了一些代码来加密数据，但我不确定它是否正确。
Element modulusElem = root.getChild("Modulus");
Element exponentElem = root.getChild("Exponent");
byte[] expBytes = decoder.decodeBuffer(exponentElem.getText().trim());
byte[] modBytes = decoder.decodeBuffer(modulusElem.getText().trim());
RSAPublicKeySpec keySpec = new RSAPublicKeySpec(new BigInteger(1, modBytes), new BigInteger(1, expBytes));
KeyFactory fact = KeyFactory.getInstance("RSA");
PublicKey pubKey = fact.generatePublic(keySpec);
How can I make a private key from the xml to decrypt the data?
如何从xml制作私钥来解密数据？
回答by WhiteFang34
Is that decoderin your example doing the Base64 decoding? It looks like you might be relying on sun.misc.BASE64Decoderand it's generally not a good idea to depend on those internal classes (other JVM's won't have it for instance). You could use Apache Commons Codecthat has a Base64 class to decode with. Here's the rest of what you need though for RSA encryption and decryption:
那是decoder在您的示例中进行 Base64 解码吗？看起来您可能会依赖sun.misc.BASE64Decoder并且依赖这些内部类通常不是一个好主意（例如其他 JVM 不会有它）。您可以使用具有 Base64 类的Apache Commons Codec进行解码。以下是 RSA 加密和解密所需的其余内容：
byte[] expBytes = Base64.decodeBase64(exponentElem.getText().trim()));
byte[] modBytes = Base64.decodeBase64(modulusElem.getText().trim());
byte[] dBytes = Base64.decodeBase64(dElem.getText().trim());
BigInteger modules = new BigInteger(1, modBytes);
BigInteger exponent = new BigInteger(1, expBytes);
BigInteger d = new BigInteger(1, dBytes);
KeyFactory factory = KeyFactory.getInstance("RSA");
Cipher cipher = Cipher.getInstance("RSA");
String input = "test";
RSAPublicKeySpec pubSpec = new RSAPublicKeySpec(modules, exponent);
PublicKey pubKey = factory.generatePublic(pubSpec);
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
byte[] encrypted = cipher.doFinal(input.getBytes("UTF-8"));
System.out.println("encrypted: " + new String(encrypted));
RSAPrivateKeySpec privSpec = new RSAPrivateKeySpec(modules, d);
PrivateKey privKey = factory.generatePrivate(privSpec);
cipher.init(Cipher.DECRYPT_MODE, privKey);
byte[] decrypted = cipher.doFinal(encrypted);
System.out.println("decrypted: " + new String(decrypted));
回答by Jalal Khodabande
Try to use
尝试使用
RSAPrivateKeySpec privSpec = new RSAPrivateCrtKeySpec(iModulus,iExponentBytes,iDBytes,iPBytes,iQBytes,iDPBytes,iDQBytes,iInverseQBytes)
and add all private key component
并添加所有私钥组件
