I have an error with decryption with RSA.
The code works on android 4.4 kit kat, but the same app doesn't work on
android 5.0 lollipop.
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger(
modulusBytes), new BigInteger(exponentBytes));
RSAPublicKey publicKey = (RSAPublicKey) keyFactory.generatePublic(
pubKeySpec);
byte[] decrypted = null;
try {
// get an RSA cipher object and print the provider
final Cipher cipher = Cipher.getInstance("RSA/None/NoPadding");
// decrypt the text using the public key
cipher.init(Cipher.DECRYPT_MODE, publicKey);
decrypted = cipher.doFinal(area_fissa_byte);
} catch (Exception ex) {
ex.printStackTrace();
Log.d("error","error");
}
The error is: *java.security.SignatureException: error:04067084:rsa
routines:RSA_EAY_PUBLIC_DECRYPT:data too large for modulus*.
My sdk target is:
`<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="19" />` for android 4.4
Do you know what is the problem?
i notice that i have 2 different public keys with different lengths!!!
- Android 5: i have 382/383 bit (too small)
- Android 4.4: i have 384 bit (ok)
i found that there are differences with android 5.0 for TLS/SSL:
https://developer.android.com/about/versions/android-5.0-changes.html
But i don't know how to fix the problem.
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