Examples with Signer com.predic8.membrane.core.interceptor.authentication.session.totp.PasscodeGenerator.Signer used on opensource projects

Example 1 with Signer

use of com.predic8.membrane.core.interceptor.authentication.session.totp.PasscodeGenerator.Signer in project service-proxy by membrane.

the class OtpProvider method computePin.

/**
 * Computes the one-time PIN given the secret key.
 *
 * @param secret
 *            the secret key
 * @param otp_state
 *            current token state (counter or time-interval)
 * @param challenge
 *            optional challenge bytes to include when computing passcode.
 * @return the PIN
 */
private String computePin(String secret, long otp_state) {
    if (secret == null || secret.length() == 0) {
        throw new RuntimeException("Null or empty secret");
    }
    try {
        Signer signer = getSigningOracle(secret);
        PasscodeGenerator pcg = new PasscodeGenerator(signer, PIN_LENGTH);
        return pcg.generateResponseCode(otp_state);
    } catch (GeneralSecurityException e) {
        throw new RuntimeException("Crypto failure", e);
    }
}

Example 2 with Signer

use of com.predic8.membrane.core.interceptor.authentication.session.totp.PasscodeGenerator.Signer in project service-proxy by membrane.

the class OtpProvider method getSigningOracle.

static Signer getSigningOracle(String secret) {
    try {
        byte[] keyBytes = decodeKey(secret);
        final Mac mac = Mac.getInstance("HMACSHA1");
        mac.init(new SecretKeySpec(keyBytes, ""));
        // implementation.
        return new Signer() {

            @Override
            public byte[] sign(byte[] data) {
                return mac.doFinal(data);
            }
        };
    } catch (NoSuchAlgorithmException error) {
        log.error("", error);
    } catch (InvalidKeyException error) {
        log.error("", error);
    }
    return null;
}