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

Example 11 with Cipher

use of javax.crypto.Cipher in project OpenAttestation by OpenAttestation.

the class HisPrivacyCAWebService2ImplTest method encryptRSA.

public static byte[] encryptRSA(byte[] text, PublicKey pubRSA) throws Exception {
    Cipher cipher = Cipher.getInstance("RSA", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, pubRSA);
    return cipher.doFinal(text);
}

Example 12 with Cipher

use of javax.crypto.Cipher in project Signal-Android by WhisperSystems.

the class DecryptingPartInputStream method initializeCipher.

private Cipher initializeCipher(SecretKeySpec key) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException, IOException {
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec iv = readIv(cipher.getBlockSize());
    cipher.init(Cipher.DECRYPT_MODE, key, iv);
    return cipher;
}

Example 13 with Cipher

use of javax.crypto.Cipher in project Signal-Android by WhisperSystems.

the class EncryptingPartOutputStream method initializeCipher.

private Cipher initializeCipher(Mac mac, SecretKeySpec key) throws IOException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException {
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] ivBytes = cipher.getIV();
    mac.update(ivBytes);
    super.write(ivBytes, 0, ivBytes.length);
    return cipher;
}

Example 14 with Cipher

use of javax.crypto.Cipher in project Signal-Android by WhisperSystems.

the class MasterCipher method encryptBytes.

public byte[] encryptBytes(byte[] body) {
    try {
        Cipher cipher = getEncryptingCipher(masterSecret.getEncryptionKey());
        Mac mac = getMac(masterSecret.getMacKey());
        byte[] encryptedBody = getEncryptedBody(cipher, body);
        byte[] encryptedAndMacBody = getMacBody(mac, encryptedBody);
        return encryptedAndMacBody;
    } catch (GeneralSecurityException ge) {
        Log.w("bodycipher", ge);
        return null;
    }
}

Example 15 with Cipher

use of javax.crypto.Cipher in project Signal-Android by WhisperSystems.

the class MasterSecretUtil method getCipherFromPassphrase.

private static Cipher getCipherFromPassphrase(String passphrase, byte[] salt, int iterations, int opMode) throws GeneralSecurityException {
    SecretKey key = getKeyFromPassphrase(passphrase, salt, iterations);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(opMode, key, new PBEParameterSpec(salt, iterations));
    return cipher;
}