私はJavaでそれを試しました。これにより、J2MEの正しい軌道に乗ることができます。コードは次のとおりです。
public class EncrypDecrypt {
private RSAPrivateCrtKey rsaPriv;
private RSAPublicKey rsaPub;
private BASE64Decoder decoder;
private BASE64Encoder encoder;
public EncrypDecrypt(){
decoder = new BASE64Decoder();
encoder = new BASE64Encoder();
byte[] buffer;
try {
FileInputStream in = new FileInputStream("pathtofile.pfx");
KeyStore kStore = KeyStore.getInstance("PKCS12");
kStore.load(in, null);
PrivateKey privKeyEntry = (PrivateKey)kStore.getKey("Key Alias", null);
rsaPriv = (RSAPrivateCrtKey) privKeyEntry;
} catch (Exception ex) {
Logger.getLogger(EncrypDecrypt.class.getName()).log(Level.SEVERE, null, ex);
}
}
public String encrypt(String data){
try{
AsymmetricBlockCipher eng = new RSAEngine();
eng = new PKCS1Encoding(eng);
RSAKeyParameters publicKey = new RSAKeyParameters(true, rsaPriv.getModulus(), rsaPriv.getPublicExponent());
eng.init(true, publicKey);
byte[] encrypted = eng.processBlock(data.getBytes(), 0, data.getBytes().length);
return encoder.encode(encrypted);
}
catch(Exception err){
return "";
}
}
public String decrypt(String data){
try
{
byte[] encrypted = decoder.decodeBuffer(data);
AsymmetricBlockCipher eng = new RSAEngine();
eng = new PKCS1Encoding(eng);
RSAKeyParameters privateKey = new RSAKeyParameters(true, rsaPriv.getModulus(), rsaPriv.getPrivateExponent());
eng.init(false, privateKey);
byte[] decrypted = eng.processBlock(encrypted, 0, encrypted.length);
return new String(decrypted);
}
catch(Exception err){
return "";
}
}
}