无法在.NET中解密Java中使用RSA/ECB/OAEPwithSHA-256andMGF1Padding的加密

Question

                 // Encrypt the symetric key
                 X509Certificate cert = ConduentCertificateLocator.getConduentCertificate();
                 PublicKey certKey = cert.getPublicKey();
                 Cipher c2 = Cipher.getInstance("RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING");
                 //Cipher c2 = Cipher.getInstance("RSA");
                 c2.init(Cipher.ENCRYPT_MODE, certKey);
                 byte[] inputCertKey = key.getEncoded();
                 byte[] encryptedKey = c2.doFinal(inputCertKey);
                 String encryptedKeyUrl = encodeToURL(encryptedKey);

           using (RSACryptoServiceProvider csp = new RSACryptoServiceProvider())
            {
                using (var stream = File.OpenRead(_appSettings.PEM))
                using (var reader = new PemUtils.PemReader(stream))
                {
                    var rsaParameters = reader.ReadRsaKey();
                    csp.ImportParameters(rsaParameters);

                    var resultBytes = csp.Decrypt(ksBytes, true);
                    finalResult = Convert.ToBase64String(resultBytes);
                }
            }

           using (RSA rsa = new RSACng())
            {
                using (var stream = File.OpenRead(_appSettings.PEM))
                using (var reader = new PemUtils.PemReader(stream))
                    rsa.ImportParameters(reader.ReadRsaKey());
                byte[] decrypted2 = rsa.Decrypt(ksBytes, RSAEncryptionPadding.OaepSHA256);
                var ss = Encoding.UTF8.GetString(decrypted2);
            }

          using (RSA rsa = RSA.Create())
            {
                using (var stream = File.OpenRead(_appSettings.PEM))
                using (var reader = new PemUtils.PemReader(stream))
                {
                    var rsaParameters = reader.ReadRsaKey();

                    rsa.ImportParameters(rsaParameters);
                }


                finalResult = rsa.Decrypt(ksBytes, RSAEncryptionPadding.OaepSHA256);
            }

d.奇尔卡特

       using (PrivateKey pkey = new PrivateKey())
        {
            pkey.LoadPemFile(_appSettings.PEMFile);
            key = pkey.GetXml();
        }

        using (Chilkat.Rsa decryptor = new Chilkat.Rsa())
            {
                decryptor.ImportPrivateKey(key);

                // Make sure we have the same settings used for encryption.
                decryptor.OaepPadding = true;
                decryptor.EncodingMode = "hex";
                decryptor.OaepHash = "sha-256";

                string eStr = decryptor.DecryptStringENC(ks, true);
            }

e.弹力城堡

        AsymmetricCipherKeyPair keyPair;
        using (var reader = File.OpenText(_appSettings.PEM))
            keyPair = (AsymmetricCipherKeyPair)new 
           Org.BouncyCastle.OpenSsl.PemReader(reader).ReadObject();
          var decryptEngine = new OaepEncoding(new RsaBlindedEngine(), new Sha256Digest(), new 
               Sha1Digest(), null);
            decryptEngine.Init(false, keyPair.Private);
            var decrypted = Encoding.UTF8.GetString(decryptEngine.ProcessBlock(ksBytes, 0, 
             ksBytes.Length));

Answer 1

我的情况有点不同，但它应该对你有帮助。我需要在java中进行解密，而它在.NET中进行了加密。与所提出的问题相反，但与其他人所提到的一样。即使您指定了RSA/ECB/OAEPwithSHA-256andMGF1Padding,在场景下的引擎盖下的Java也默认为SHA-1。对我来说，诀窍是传递一个额外的参数，告诉它实际使用SHA-256。

Java：

private static byte[] decryptBytes(byte[] buffer, Key key) throws InvalidKeyException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
    Cipher rsa;
    rsa = Cipher.getInstance("RSA/ECB/OAEPWithSHA-256AndMGF1Padding");
    rsa.init(Cipher.DECRYPT_MODE, key, new OAEPParameterSpec("SHA-256", "MGF1", new MGF1ParameterSpec("SHA-256"), PSource.PSpecified.DEFAULT));
    return rsa.doFinal(buffer);
}

.NET

var encryptedBytes = publicKey.Encrypt(bytesToEncrypt, RSAEncryptionPadding.OaepSHA256);