Android Utililty Methods Key Create

List of utility methods to do Key Create

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Description

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

Method

KeygenerateKey(String key)
generate Key 
try {
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
    return keySpec;
} catch (Exception e) {
    e.printStackTrace();
    throw e;
byte[]generateKey(byte[] randomSeed)
generate Key 
KeyGenerator gen = KeyGenerator.getInstance(CIPHER_ALGORITHM);
SecureRandom rand = SecureRandom.getInstance(RANDOM_GENERATOR_TYPE);
rand.setSeed(randomSeed);
gen.init(RANDOM_KEY_SIZE, rand);
SecretKey myKey = gen.generateKey();
return myKey.getEncoded();
byte[]getRawKey(byte[] seed)
get Raw Key 
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(seed);
kgen.init(128, sr); 
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
return raw;
byte[]getRawKey(byte[] seed)
get Raw Key 
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(seed);
kgen.init(128, sr); 
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
return raw;
StringcreateRandomKey(int size)
create Random Key 
char[] c = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0' };
Random random = new Random();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < size; i++) {
    sb.append(c[Math.abs(random.nextInt()) % c.length]);
return sb.toString();
byte[]generateKey(byte[] seed)
generate Key 
KeyGenerator keyGenerator = KeyGenerator
        .getInstance(CIPHER_ALGORITHM);
SecureRandom secureRandom = SecureRandom
        .getInstance(RANDOM_GENERATOR_ALGORITHM);
secureRandom.setSeed(seed);
keyGenerator.init(RANDOM_KEY_SIZE, secureRandom);
SecretKey secretKey = keyGenerator.generateKey();
return secretKey.getEncoded();
...
SecretKeygenerateKey(char[] passphraseOrPin, byte[] salt)
generate Key 
final int iterations = 1000;
final int outputKeyLength = 128;
SecretKeyFactory secretKeyFactory = SecretKeyFactory
        .getInstance("PBKDF2WithHmacSHA1");
KeySpec keySpec = new PBEKeySpec(passphraseOrPin, salt, iterations,
        outputKeyLength);
return secretKeyFactory.generateSecret(keySpec);
SecretKeygenerateKey(char[] passphraseOrPin, byte[] salt)
generate Key 
final int iterations = 1000;
final int outputKeyLength = 128;
SecretKeyFactory secretKeyFactory = SecretKeyFactory
        .getInstance("PBKDF2WithHmacSHA1");
KeySpec keySpec = new PBEKeySpec(passphraseOrPin, salt, iterations,
        outputKeyLength);
SecretKey secretKey = secretKeyFactory.generateSecret(keySpec);
return secretKey;
...
byte[]generateMacSecret()
generate Mac Secret 
try {
    KeyGenerator generator = KeyGenerator.getInstance("HmacSHA1");
    return generator.generateKey().getEncoded();
} catch (NoSuchAlgorithmException e) {
    Log.w("keyutil", e);
    return null;
byte[]getKey(String keyRule)
get Key 
Key key = null;
byte[] keyByte = keyRule.getBytes();
byte[] byteTemp = new byte[8];
for (int i = 0; i < byteTemp.length && i < keyByte.length; i++) {
    byteTemp[i] = keyByte[i];
key = new SecretKeySpec(byteTemp, "DES");
return key.getEncoded();
...