Examples with SecretKeyFactory javax.crypto.SecretKeyFactory used on opensource projects

Example 76 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project android-demos by novoda.

the class Encrypt method crypt.

public String crypt(int mode, String encryption_subject) throws CryptException {
    final PBEParameterSpec ps = new javax.crypto.spec.PBEParameterSpec(SALT, 20);
    final SecretKeyFactory kf = getSecretKeyFactory();
    final SecretKey k = getSecretKey(kf);
    final Cipher crypter = getCipherInstance();
    String result;
    switch(mode) {
        case Cipher.DECRYPT_MODE:
            initialise(ps, k, crypter, Cipher.DECRYPT_MODE);
            result = getString(encryption_subject, crypter);
            break;
        case Cipher.ENCRYPT_MODE:
        default:
            initialise(ps, k, crypter, Cipher.ENCRYPT_MODE);
            result = encode(encryption_subject, crypter);
    }
    return result;
}

Example 77 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project jodd by oblac.

the class PBKDF2Hash method pbkdf2.

/**
	 * Computes the PBKDF2 hash of a password.
	 *
	 * @param password the password to hash.
	 * @param salt the salt
	 * @param iterations the iteration count (slowness factor)
	 * @param bytes the length of the hash to compute in bytes
	 * @return the PBDKF2 hash of the password
	 */
private static byte[] pbkdf2(char[] password, byte[] salt, int iterations, int bytes) {
    PBEKeySpec spec = new PBEKeySpec(password, salt, iterations, bytes * 8);
    SecretKeyFactory skf = null;
    try {
        skf = SecretKeyFactory.getInstance(PBKDF2_ALGORITHM);
        return skf.generateSecret(spec).getEncoded();
    } catch (NoSuchAlgorithmException ignore) {
        return null;
    } catch (InvalidKeySpecException e) {
        throw new IllegalArgumentException(e);
    }
}

Example 78 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project platform_frameworks_base by android.

the class BackupManagerService method buildCharArrayKey.

private SecretKey buildCharArrayKey(String algorithm, char[] pwArray, byte[] salt, int rounds) {
    try {
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm);
        KeySpec ks = new PBEKeySpec(pwArray, salt, rounds, PBKDF2_KEY_SIZE);
        return keyFactory.generateSecret(ks);
    } catch (InvalidKeySpecException e) {
        Slog.e(TAG, "Invalid key spec for PBKDF2!");
    } catch (NoSuchAlgorithmException e) {
        Slog.e(TAG, "PBKDF2 unavailable!");
    }
    return null;
}

Example 79 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project robovm by robovm.

the class BcKeyStoreSpi method makePBECipher.

protected Cipher makePBECipher(String algorithm, int mode, char[] password, byte[] salt, int iterationCount) throws IOException {
    try {
        PBEKeySpec pbeSpec = new PBEKeySpec(password);
        SecretKeyFactory keyFact = SecretKeyFactory.getInstance(algorithm, BouncyCastleProvider.PROVIDER_NAME);
        PBEParameterSpec defParams = new PBEParameterSpec(salt, iterationCount);
        Cipher cipher = Cipher.getInstance(algorithm, BouncyCastleProvider.PROVIDER_NAME);
        cipher.init(mode, keyFact.generateSecret(pbeSpec), defParams);
        return cipher;
    } catch (Exception e) {
        throw new IOException("Error initialising store of key store: " + e);
    }
}

Example 80 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project robovm by robovm.

the class PKCS12KeyStoreSpi method wrapKey.

protected byte[] wrapKey(String algorithm, Key key, PKCS12PBEParams pbeParams, char[] password) throws IOException {
    PBEKeySpec pbeSpec = new PBEKeySpec(password);
    byte[] out;
    try {
        SecretKeyFactory keyFact = SecretKeyFactory.getInstance(algorithm, bcProvider);
        PBEParameterSpec defParams = new PBEParameterSpec(pbeParams.getIV(), pbeParams.getIterations().intValue());
        Cipher cipher = Cipher.getInstance(algorithm, bcProvider);
        cipher.init(Cipher.WRAP_MODE, keyFact.generateSecret(pbeSpec), defParams);
        out = cipher.wrap(key);
    } catch (Exception e) {
        throw new IOException("exception encrypting data - " + e.toString());
    }
    return out;
}