[英]BouncyCastle RSA cannot cast android
我在C#中使用BouncyCastle的代碼
var jsonToSend = "{\"Number\":\"string\",\"Name\":\"string\",\"NameOnCard\":\"string\",\"ExpMonth\":0,\"ExpYear\":0}";
var PemBase64string = "LS0tLS1CRUdJTiBQVUJMSUMgS0VZLS0tLS0NCk1JR2ZNQTBHQ1NxR1NJYjNEUUVCQVFVQUE0R05BRENCaVFLQmdRQ1lrTnVuSGx0dkI1Vm5TamVJZ0hJNEx4bmkNCjlzVzZoL0d0TXRld2pGaWFrUVYxSUg2QUlEeHgzRU9LYW85Tk85LzZ4ZlFzZWVLN2lXbFRUajd4M0VqNmpBOFYNCkExTmJzTEZGVkNuVEpsWHQ0M012N0dYQVovQTZpVEtCQSt5eGREYXJkVUVObmJQSnJFMEJvMEkvNTFnLzJKemQNCkJIRUFpN3c3ZDhCRGRCN1FiUUlEQVFBQg0KLS0tLS1FTkQgUFVCTElDIEtFWS0tLS0tDQo = ";
var pemKey = Encoding.UTF8.GetString(Convert.FromBase64String(PemBase64string));
var sr = new StringReader(pemKey);
var pubKey = (RsaKeyParameters)new PemReader(sr).ReadObject();
//Setup encryption engine
IAsymmetricBlockCipher eng = new Pkcs1Encoding(new RsaEngine());
eng.Init(true, pubKey);
byte[] encdata = Encoding.UTF8.GetBytes(jsonToSend); //convert json string to bytes
encdata = eng.ProcessBlock(encdata, 0, encdata.Length); //encrypt bytes
string result = Convert.ToBase64String(encdata); //convert encrypted bytes to Base64 string to send
我試圖在java中重寫這段代碼
byte[] pemKey = Base64.decode(PemBase64String, Base64.DEFAULT);
String result;
try {
Reader sr = new StringReader(new String(pemKey, "UTF-8"));
RSAKeyParameters pubKey = (RSAKeyParameters) new PEMReader(sr).readObject();
PKCS1Encoding eng = new PKCS1Encoding(new RSAEngine());
eng.init(true, pubKey);
byte[] encData = jsonToSend.getBytes("UTF-8");
encData = eng.processBlock(encData, 0, encData.length);
result = new String(Base64.decode(encData, Base64.DEFAULT), "UTF-8");
} catch (Exception e) {
Logger.e(TAG, e.getMessage(), e);
throw new CryptoException(e.getMessage());
}
但是,這給了我
com.android.org.bouncycastle.jcajce.provider.asymmetric.rsa.BCRSAPublicKey無法強制轉換為org.bouncycastle.crypto.params.RSAKeyParameters
我怎么解決這個問題?
我在RSAKeyParameters期間遇到此錯誤pubKey =(RSAKeyParameters)new PEMReader(sr).readObject();
PS在java中我使用相同的BouncyCastle庫
正確的代碼是
RSAPublicKey pubKey = (RSAPublicKey) new PEMReader(sr).readObject();
RSAKeyParameters rsaKeyParameters = new RSAKeyParameters(false, pubKey.getModulus(), pubKey.getPublicExponent());
AsymmetricBlockCipher eng = new PKCS1Encoding(new RSAEngine());
eng.init(true, rsaKeyParameters);
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