import android.util.Log;
import org.bouncycastle.bcpg.ArmoredOutputStream;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openpgp.PGPCompressedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedData;
import org.bouncycastle.openpgp.PGPEncryptedDataGenerator;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPLiteralData;
import org.bouncycastle.openpgp.PGPLiteralDataGenerator;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPPublicKeyRingCollection;
import org.bouncycastle.openpgp.PGPUtil;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Date;
import java.util.Iterator;
import static android.support.constraint.Constraints.TAG;
public class RSAEncryption {
static dataToBeEncrypt = "Hello";
static String publickey = "-----BEGIN PGP PUBLIC KEY BLOCK-----\n" +
"\n" +
"mI0EXEr27gEEALybxOEubZ39PX1t+oU9iXhTTmqrc/+ha+J6TYd+yvYcNEBIOzPI\n" +
"1fG2Tz30zJYwT9uZOyW7LAGKRcsIH6p4SiKGaEYBLEWuCQrGfXPAAXaH+WNsKOmz\n" +
"SAZilPwugEcWknIUDZzfU0AD8PPCLqhJM6Ij7AJ/SNa2xUIsyUW+PwBdABEBAAG0\n" +
"BWplZXRziM4EEwEKADgWIQRp0+dcK5ZTXht9TIcw0CiFbn2j6gUCXEr27gIbAwUL\n" +
"CQgHAgYVCgkICwIEFgIDAQIeAQIXgAAKCRAw0CiFbn2j6um7A/9Ttzl8xHa4MvuF\n" +
"htOEAb6sXOk17B9BQyd3bkUCYtBjmFA3Q7XzWln5lm2QQTxW+AnlVJYwQS5zvVC0\n" +
"8WgPh6XP9sCi6/2ar748wpS8dL1wEAwaMOSYGEDCUpmW2uEGsrsAKfiMlKGhLiPC\n" +
"uUvPJ0x2jjHn9HHO1e9BES9tlkRPJLiNBFxK9u4BBADQtF6EajJMi2IPsVDR6PTX\n" +
"swjGgVbYKqwZRUwfLecJ95VeiQzznWUMpWFze4ESlAjCYeJf37voDazs6Ol5Uqz7\n" +
"7d5GurEk4kNjQp4Pm+chFQWLWU1seMghyJqsXCjWApy0lNJ2YPNbYKUqdJsZpJgT\n" +
"7qofPvEEPlGRRqzZxdN8oQARAQABiLYEGAEKACAWIQRp0+dcK5ZTXht9TIcw0CiF\n" +
"bn2j6gUCXEr27gIbDAAKCRAw0CiFbn2j6ky9BACgADAD/VIFIUjuQtNa4GEcAS0T\n" +
"vtJvsL26qW/Gohl5nb1ix7MLBwiH/l1Co6K52GKAVUrZBCnjkJW5zyGTKUkPGbGY\n" +
"Loh481phsvpYgXHqol7UQivBoF14EO1dNmn61QFRn7D3zhNirziOKQl3kLSuEdc5\n" +
"VpRF7ubkHL3jRrdQFA==\n" +
"=/lmV\n" +
"-----END PGP PUBLIC KEY BLOCK-----";
public static void main (String[] args){
String encrypted = null;
try {
encrypted = encryptToFile(dataToBeEncrypt, publicKey);
} catch (Exception e) {
Log.i(TAG, "Exception: " + e);
}
return encrypted;
}
public static String encryptToFile(String inputdata, String keyFile) throws Exception {
Security.addProvider(new BouncyCastleProvider());
byte[] original = inputdata.getBytes();
InputStream secKey = new ByteArrayInputStream(keyFile.getBytes("UTF-8"));
byte[] encrypted = encrypt(original, readPublicKey(secKey), true, true);
return new String(encrypted);
}
private static PGPPublicKey readPublicKey(InputStream in) throws IOException, PGPException {
PGPPublicKey k = null;
in = PGPUtil.getDecoderStream(in);
PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(in);
Iterator rIt = pgpPub.getKeyRings();
while (rIt.hasNext()) {
PGPPublicKeyRing kRing = (PGPPublicKeyRing) rIt.next();
Iterator kIt = kRing.getPublicKeys();
while (kIt.hasNext()) {
k = (PGPPublicKey) kIt.next();
if (k.isEncryptionKey()) {
break;
}
}
}
return k;
}
/**
* Simple PGP encryptor between byte[].
*
* @param clearData
* The test to be encrypted
* @param //passPhrase
* The pass phrase (key). This method assumes that the key is a
* simple pass phrase, and does not yet support RSA or more
* sophisiticated keying.
* @param //fileName
* File name. This is used in the Literal Data Packet (tag 11)
* which is really inly important if the data is to be related to
* a file to be recovered later. Because this routine does not
* know the source of the information, the caller can set
* something here for file name use that will be carried. If this
* routine is being used to encrypt SOAP MIME bodies, for
* example, use the file name from the MIME type, if applicable.
* Or anything else appropriate.
*
* @param armor
* @return encrypted data.
* @exception IOException
* @exception PGPException
* @exception NoSuchProviderException
*/
public static byte[] encrypt(byte[] clearData, PGPPublicKey encKey, boolean withIntegrityCheck, boolean armor)
throws IOException, PGPException, NoSuchProviderException {
ByteArrayOutputStream encOut = new ByteArrayOutputStream();
OutputStream out = encOut;
if (armor) {
out = new ArmoredOutputStream(out);
}
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(
PGPCompressedDataGenerator.ZIP);
OutputStream cos = comData.open(bOut); // open it with the final
// destination
PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();
// we want to generate compressed data. This might be a user option
// later,
// in which case we would pass in bOut.
OutputStream pOut = lData.open(cos, // the compressed output stream
PGPLiteralData.BINARY, "", // "filename" to store
clearData.length, // length of clear data
new Date() // current time
);
pOut.write(clearData);
lData.close();
comData.close();
PGPEncryptedDataGenerator cPk = new PGPEncryptedDataGenerator(
PGPEncryptedData.CAST5, withIntegrityCheck, new SecureRandom(),
"BC");
cPk.addMethod(encKey);
byte[] bytes = bOut.toByteArray();
OutputStream cOut = cPk.open(out, bytes.length);
cOut.write(bytes); // obtain the actual bytes from the compressed stream
cOut.close();
out.close();
return encOut.toByteArray();
}
}
Я пытался добиться шифрования с использованием алгоритма RSA с заданным открытым ключом и текстом для шифрования.Ниже мой код, который я пробовал, когда я передаю свой открытый ключ и строку и получаю зашифрованные данные.Проблема в том, что код ниже работает нормально, когда я запускаю его как Java-приложение, но когда я использую его в своем коде Android, я всегда получаю org.bouncycastle.openpgp.PGPException: Exception creating cipher как исключение для строки OutputStream cOut = cPk.open(out, bytes.length);.Подскажите пожалуйста, как мне заставить его работать с моим приложением для Android.
Также, OutputStream pOut = lData.open(cos, // the compressed output stream PGPLiteralData.BINARY, "", // "filename" to store clearData.length, // length of clear data new Date() // current time ); Я передаю имя файла как null.Это создает проблему?
Я ожидаю Encrypted Message Without Version: BCPG v1.46, но я получаю org.bouncycastle.openpgp.PGPException: Exception creating cipher в строке OutputStream cOut = cPk.open(out, bytes.length);
Отредактировано Исключение:
org.bouncycastle.openpgp.PGPException: Exception creating cipher
at org.bouncycastle.openpgp.PGPEncryptedDataGenerator.open(Unknown Source)
at org.bouncycastle.openpgp.PGPEncryptedDataGenerator.open(Unknown Source)
at com.example.Resources.RSAEncryption.encrypt(RSAEncryption.java:157)
at com.example.Resources.RSAEncryption.encryptToFile(RSAEncryption.java:74)
at com.example.Resources.RSAEncryption.encryption(RSAEncryption.java:62)
at com.example.EQR.QRUserCredentials.onActivityResult(QRUserCredentials.java:140)
at android.app.Activity.dispatchActivityResult(Activity.java:6931)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4090)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4137)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1529)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Caused by: java.security.NoSuchAlgorithmException: Provider BC does not provide CAST5/CFB/NoPadding
at javax.crypto.Cipher.createCipher(Cipher.java:921)
at javax.crypto.Cipher.getInstance(Cipher.java:901)
... 17 more
