Hi all,
I use encryption method like at post:
http://groups.google.com/group/android-developers/browse_thread/thread/091d69976f4b9362.
public class SimpleCrypto {
public static String encrypt(String seed, String cleartext)
throws
Exception {
byte[] rawKey = getRawKey(seed.getBytes());
byte[] result = encrypt(rawKey,
cleartext.getBytes());
return toHex(result);
}
public static String decrypt(String seed, String encrypted)
throws
Exception {
byte[] rawKey = getRawKey(seed.getBytes());
byte[] enc = toByte(encrypted);
byte[] result = decrypt(rawKey, enc);
return new String(result);
}
private static byte[] getRawKey(byte[] seed) throws Exception
{
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom sr =
SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(seed);
kgen.init(128, sr); // 192 and 256 bits may not be
available
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
return raw;
}
private static byte[] encrypt(byte[] raw, byte[] clear) throws
Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(clear);
return encrypted;
}
private static byte[] decrypt(byte[] raw, byte[] encrypted)
throws
Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] decrypted = cipher.doFinal(encrypted);
return decrypted;
}
public static String toHex(String txt) {
return toHex(txt.getBytes());
}
public static String fromHex(String hex) {
return new String(toByte(hex));
}
public static byte[] toByte(String hexString) {
int len = hexString.length()/2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++)
result[i] =
Integer.valueOf(hexString.substring(2*i, 2*i+2),
16).byteValue();
return result;
}
public static String toHex(byte[] buf) {
if (buf == null)
return "";
StringBuffer result = new StringBuffer(2*buf.length);
for (int i = 0; i < buf.length; i++) {
appendHex(result, buf[i]);
}
return result.toString();
}
private final static String HEX = "0123456789ABCDEF";
private static void appendHex(StringBuffer sb, byte b) {
sb.append(HEX.charAt((b>>4)&0x0f)).append(HEX.charAt(b&0x0f));
}
}
since i can not get work same encryption method in php webserver, i do
it using jsp webserver.
but the result of the encryption is not same.
example:
plain: test
key: 123456
encrypt: 1D402811E4FDD1B14412B3E1AA328450
but in the android, i got: ACE3D0F0C96B2B13DDD6372A61DFCAA5
i did print both of the code, to check if one of them have different,
but it is same.
can someone help what possible wrong or what i should check in both
code?
or.. the encryption method is not match by the one done with jsp ?
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