how can I convert String to SecretKey
- by Alaa
I want to convert String to secretKey
public void generateCode(String keyStr){
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128); // 192 and 256 bits may not be available
// Generate the secret key specs.
secretKey skey=keyStr; //How can I make the casting here
//SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
}
I try to use BASE64Decoder instead of secretKey, but I face a porblem which is I cannot specify key length.
EDIT:
I want to call this function from another place
static public String encrypt(String message , String key , int keyLength) throws Exception {
// Get the KeyGenerator
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(keyLength); // 192 and 256 bits may not be available
// Generate the secret key specs.
//decode the BASE64 coded message
SecretKey skey = key; //here is the error
raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
// Instantiate the cipher
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
System.out.println("msg is" + message + "\n raw is" + raw);
byte[] encrypted = cipher.doFinal(message.getBytes());
String cryptedValue = new String(encrypted);
System.out.println("encrypted string: " + cryptedValue);
return cryptedValue;
}
Any one can help, i'll be very thankful.
