Examples with Cipher org.mozilla.jss.crypto.Cipher used on opensource projects

Example 1 with Cipher

use of org.mozilla.jss.crypto.Cipher in project OpenAM by OpenRock.

the class JSSEncryption method encode.

/**
     * <p>Encrypt a String.</p>
     * @param clearText The string to be encoded.
     * @return The encoded string.
     */
private byte[] encode(byte[] clearText) {
    if (clearText == null || clearText.length == 0)
        return null;
    try {
        byte[] type = new byte[2];
        String encAlgString = DEFAULT_ENCYPTION_ALG;
        EncryptionAlgorithm encAlg = getEncryptionAlg(encAlgString);
        int i = getEncryptionByte(encAlgString);
        type[1] = (byte) i;
        Cipher cipher = mToken.getCipherContext(encAlg);
        String keyA = DEFAULT_KEYGEN_ALG;
        i = getKeyGenByte(keyA);
        type[0] = (byte) i;
        SymmetricKey sk = getSymmetricKey(i);
        // bug in JSS: msg in stdout.
        //secureRandom.nextBytes(iv);
        IVParameterSpec ivSpec = getIVParameterSpec(i);
        byte[] iv = ivSpec.getIV();
        cipher.initEncrypt(sk, ivSpec);
        byte[] enc = cipher.doFinal(clearText);
        enc = addPrefix(type, iv, enc);
        return (enc);
    } catch (Throwable e) {
        if (debug != null) {
            debug.error("in encode string " + e);
        }
        return null;
    }
}

Example 2 with Cipher

use of org.mozilla.jss.crypto.Cipher in project OpenAM by OpenRock.

the class JSSEncryption method decode.

/** 
     * Decode an encoded string
     *
     * @param encoded The encoded string.
     * @return The decoded string.
     **/
private byte[] decode(byte[] encoded) {
    if (encoded == null || encoded.length == 0) {
        return null;
    }
    try {
        byte[] share = encoded;
        if (share[0] != VERSION) {
            if (debug != null) {
                debug.error("In decode string: unsupported version:" + share[0]);
            }
            return null;
        }
        // get the alg from the string
        byte[] type = getType(share);
        // get the encrypted data
        share = getRaw(share);
        if ((int) type[1] < 0 && (int) type[1] >= NUM_ENCRYPTION_ALG) {
            if (debug != null) {
                debug.error("In decode string: unsupported encryption bit:" + (int) type[1]);
            }
            return null;
        }
        EncryptionAlgorithm encAlg = getEncryptionAlg(ENCRYPTION_ALGS[(int) type[1]]);
        Cipher cipher = mToken.getCipherContext(encAlg);
        if ((int) type[0] < 0 && (int) type[0] >= NUM_KEYGEN_ALG) {
            if (debug != null) {
                debug.error("In decode string: unsupported keygen bit:" + (int) type[0]);
            }
            return null;
        }
        SymmetricKey sk = getSymmetricKey((int) type[0]);
        IVParameterSpec ivSpec = getIVParameterSpec((int) type[0]);
        cipher.initDecrypt(sk, ivSpec);
        byte[] dec = cipher.doFinal(share);
        if (dec == null) {
            debug.error("Failed to decode " + encoded);
            return null;
        }
        return (dec);
    } catch (Throwable e) {
        if (debug != null) {
            debug.error("in decoding string " + encoded, e);
        }
        return null;
    }
}