The jar (bcprov-jdk16-145.jar) has been added to the project, Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider())
has been added to the class, and BouncyCastleProvider.PROVIDER_NAME
does return "BC" but AesFileIo.writeFile() still throws java.security.NoSuchProviderException No such provider: BC
. Any ideas?
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
public class AesFileIo {
private static final String AES_ALGORITHM = "AES/CTR/NoPadding";
private static final String PROVIDER = BouncyCastleProvider.PROVIDER_NAME;
private static final byte[] AES_KEY_128 = { // Hard coded for now
78, -90, 42, 70, -5, 20, -114, 103,
-99, -25, 76, 95, -85, 94, 57, 54};
private static final byte[] IV = { // Hard coded for now
-85, -67, -5, 88, 28, 49, 49, 85,
114, 83, -40, 119, -65, 91, 76, 108};
private static final SecretKeySpec secretKeySpec =
new SecretKeySpec(AES_KEY_128, "AES");
private static final IvParameterSpec ivSpec = new IvParameterSpec(IV);
public void AesFileIo() {
Security.addProvider(new org.bouncycastle.jce.provider
.BouncyCastleProvider());
}
public void writeFile(String fileName, String theFile) {
try {
Cipher cipher = Cipher.getInstance(AES_ALGORITHM, PROVIDER);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
byte[] encrypted = cipher.doFinal(theFile.getBytes());
ObjectOutputStream os = new ObjectOutputStream(
new FileOutputStream(fileName));
os.write(encrypted);
os.flush();
os.close();
} catch (Exception e) {
StackTraceElement se = new Exception().getStackTrace()[0];
System.err.println(se.getFileName() + " " + se.getLineNumber()
+ " " + e);
}
}
}
Im not very familiar with the Android sdk, but it seems that the android-sdk
comes with the BouncyCastle
provider already added to the security.
What you will have to do in the PC environment is just add it manually,
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
if you have access to the policy
file, just add an entry like:
security.provider.5=org.bouncycastle.jce.provider.BouncyCastleProvider
Notice the .5
it is equal to a sequential number of the already added providers.