android DES decrypt file : pad block corrupted
- by Kenny Chang
public class TestDES {
Key key;
public TestDES(String str) {
getKey(str);
}
public void getKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance("DES");
_generator.init(new SecureRandom(strKey.getBytes()));
this.key = _generator.generateKey();
_generator = null;
} catch (Exception e) {
throw new RuntimeException("Error initializing SqlMap class. Cause: " + e);
}
}
public void decrypt(String file, String dest) throws Exception {
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, this.key);
InputStream is = new FileInputStream(file);
OutputStream out = new FileOutputStream(dest);
CipherOutputStream cos = new CipherOutputStream(out, cipher);
byte[] buffer = new byte[1024 * 1024 * 6];
int r;
while ((r = is.read(buffer)) >= 0) {
cos.write(buffer, 0, r);
}
cos.close();a
out.close();
is.close();
}
}
The code works well on PC JAVA Program, but not on android.The error "pad block corrupted" happended at 'cos.close();'
LogCat shows:"
03-10 07:43:04.431: WARN/System.err(23765): java.io.IOException: pad block corrupted
03-10 07:43:04.460: WARN/System.err(23765): at javax.crypto.CipherOutputStream.close(CipherOutputStream.java:157)
"
