Objective C AES encrypt equal to java version - objective-c

Question

I have java code to encrypt a password,
public static String encryptToString(String content,String password) throws IOException {
return parseByte2HexStr(encrypt(content, password));
}
private static byte[] encrypt(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes());
kgen.init(128, secureRandom);
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] result = cipher.doFinal(byteContent);
return result;
} catch (Exception e) {
log.error(e.getMessage(),e);
}
return null;
}
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
Now I need to encrypt/decrypt it with objective-c, I do a lot of search and none method would generate the same encrypted output.
What's the objective-c version code equal to java code?
test case: encryptToString("test","password") => DA180930496EC69BFEBA923B7311037A

Answer 1

I believe the answers to this question are what you are looking for: Any cocoa source code for AES encryption decryption?
I adapted a function somebody posted as answer: https://gist.github.com/4335132
To use:
NSString *content = #"test";
NSData *dataToEncrypt = [content dataUsingEncoding:NSUTF8StringEncoding];
NSData *data = [dataToEncrypt AES128EncryptWithKey:#"password"];
NSString *hex = [data hexString];
It's not exactly the same because your Java code does not use the password itself for encrypting but uses it to seed a random number generator. But I think that this should still work with what you are trying to do.