Android Utililty Methods AES Key Get

List of utility methods to do AES Key Get

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Description

The list of methods to do AES Key Get are organized into topic(s).

Method

byte[]initSecretKey()
init secret key 
KeyGenerator kg = null;
try {
    kg = KeyGenerator.getInstance(KEY_ALGORITHM);
} catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
    return new byte[0];
kg.init(128);
...
booleankeyAreEqual(byte[] b1, byte[] b2)
compare if the given two keys are equal 
if (b1.length != b2.length) {
    return false;
for (int i = 0; i < b1.length; i++) {
    if (b1[i] != b2[i]) {
        return false;
return true;
KeymakeKey()
make Key 
return makeKey(ENCRYPTION_KEY);
KeymakeKey(String passkey)
make Key 
try {
    MessageDigest md = MessageDigest.getInstance("SHA-256");
    byte[] key = md.digest(passkey.getBytes("UTF-8"));
    return new SecretKeySpec(key, "AES");
} catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
...
KeytoKey(byte[] key)
transfer secret key 
return new SecretKeySpec(key, KEY_ALGORITHM);
byte[]generateEncryptionSecret()
generate Encryption Secret 
try {
    KeyGenerator generator = KeyGenerator.getInstance("AES");
    generator.init(128);
    SecretKey key = generator.generateKey();
    return key.getEncoded();
} catch (NoSuchAlgorithmException ex) {
    Log.w("keyutil", ex);
    return null;
...