Examples with ParametersWithRandom org.bouncycastle.crypto.params.ParametersWithRandom used on opensource projects

Example 31 with ParametersWithRandom

use of org.bouncycastle.crypto.params.ParametersWithRandom in project XobotOS by xamarin.

the class PaddedBufferedBlockCipher method init.

/**
     * initialise the cipher.
     *
     * @param forEncryption if true the cipher is initialised for
     *  encryption, if false for decryption.
     * @param params the key and other data required by the cipher.
     * @exception IllegalArgumentException if the params argument is
     * inappropriate.
     */
public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException {
    this.forEncryption = forEncryption;
    reset();
    if (params instanceof ParametersWithRandom) {
        ParametersWithRandom p = (ParametersWithRandom) params;
        padding.init(p.getRandom());
        cipher.init(forEncryption, p.getParameters());
    } else {
        padding.init(null);
        cipher.init(forEncryption, params);
    }
}

Example 32 with ParametersWithRandom

use of org.bouncycastle.crypto.params.ParametersWithRandom in project XobotOS by xamarin.

the class ECDSASigner method init.

public void init(boolean forSigning, CipherParameters param) {
    if (forSigning) {
        if (param instanceof ParametersWithRandom) {
            ParametersWithRandom rParam = (ParametersWithRandom) param;
            this.random = rParam.getRandom();
            this.key = (ECPrivateKeyParameters) rParam.getParameters();
        } else {
            this.random = new SecureRandom();
            this.key = (ECPrivateKeyParameters) param;
        }
    } else {
        this.key = (ECPublicKeyParameters) param;
    }
}

Example 33 with ParametersWithRandom

use of org.bouncycastle.crypto.params.ParametersWithRandom in project XobotOS by xamarin.

the class RSACoreEngine method init.

/**
     * initialise the RSA engine.
     *
     * @param forEncryption true if we are encrypting, false otherwise.
     * @param param the necessary RSA key parameters.
     */
public void init(boolean forEncryption, CipherParameters param) {
    if (param instanceof ParametersWithRandom) {
        ParametersWithRandom rParam = (ParametersWithRandom) param;
        key = (RSAKeyParameters) rParam.getParameters();
    } else {
        key = (RSAKeyParameters) param;
    }
    this.forEncryption = forEncryption;
}

Example 34 with ParametersWithRandom

use of org.bouncycastle.crypto.params.ParametersWithRandom in project robovm by robovm.

the class DSASigner method engineInitSign.

protected void engineInitSign(PrivateKey privateKey) throws InvalidKeyException {
    CipherParameters param;
    param = DSAUtil.generatePrivateKeyParameter(privateKey);
    if (random != null) {
        param = new ParametersWithRandom(param, random);
    }
    digest.reset();
    signer.init(true, param);
}

Example 35 with ParametersWithRandom

use of org.bouncycastle.crypto.params.ParametersWithRandom in project robovm by robovm.

the class BaseBlockCipher method engineInit.

protected void engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random) throws InvalidKeyException, InvalidAlgorithmParameterException {
    CipherParameters param;
    this.pbeSpec = null;
    this.pbeAlgorithm = null;
    this.engineParams = null;
    //
    if (!(key instanceof SecretKey)) {
        throw new InvalidKeyException("Key for algorithm " + key.getAlgorithm() + " not suitable for symmetric enryption.");
    }
    //
    if (params == null && baseEngine.getAlgorithmName().startsWith("RC5-64")) {
        throw new InvalidAlgorithmParameterException("RC5 requires an RC5ParametersSpec to be passed in.");
    }
    //
    if (key instanceof BCPBEKey) {
        BCPBEKey k = (BCPBEKey) key;
        if (k.getOID() != null) {
            pbeAlgorithm = k.getOID().getId();
        } else {
            pbeAlgorithm = k.getAlgorithm();
        }
        if (k.getParam() != null) {
            param = k.getParam();
            if (params instanceof IvParameterSpec) {
                IvParameterSpec iv = (IvParameterSpec) params;
                param = new ParametersWithIV(param, iv.getIV());
            }
        } else if (params instanceof PBEParameterSpec) {
            pbeSpec = (PBEParameterSpec) params;
            param = PBE.Util.makePBEParameters(k, params, cipher.getUnderlyingCipher().getAlgorithmName());
        } else {
            throw new InvalidAlgorithmParameterException("PBE requires PBE parameters to be set.");
        }
        if (param instanceof ParametersWithIV) {
            ivParam = (ParametersWithIV) param;
        }
    } else if (params == null) {
        param = new KeyParameter(key.getEncoded());
    } else if (params instanceof IvParameterSpec) {
        if (ivLength != 0) {
            IvParameterSpec p = (IvParameterSpec) params;
            if (p.getIV().length != ivLength && !isAEADModeName(modeName)) {
                throw new InvalidAlgorithmParameterException("IV must be " + ivLength + " bytes long.");
            }
            if (key instanceof RepeatedSecretKeySpec) {
                param = new ParametersWithIV(null, p.getIV());
                ivParam = (ParametersWithIV) param;
            } else {
                param = new ParametersWithIV(new KeyParameter(key.getEncoded()), p.getIV());
                ivParam = (ParametersWithIV) param;
            }
        } else {
            if (modeName != null && modeName.equals("ECB")) {
                throw new InvalidAlgorithmParameterException("ECB mode does not use an IV");
            }
            param = new KeyParameter(key.getEncoded());
        }
    } else // BEGIN android-removed
    // else if (params instanceof GOST28147ParameterSpec)
    // {
    //     GOST28147ParameterSpec    gost28147Param = (GOST28147ParameterSpec)params;
    //
    //     param = new ParametersWithSBox(
    //                new KeyParameter(key.getEncoded()), ((GOST28147ParameterSpec)params).getSbox());
    //
    //     if (gost28147Param.getIV() != null && ivLength != 0)
    //     {
    //         param = new ParametersWithIV(param, gost28147Param.getIV());
    //         ivParam = (ParametersWithIV)param;
    //     }
    // }
    // else if (params instanceof RC2ParameterSpec)
    // {
    //     RC2ParameterSpec    rc2Param = (RC2ParameterSpec)params;
    //
    //     param = new RC2Parameters(key.getEncoded(), ((RC2ParameterSpec)params).getEffectiveKeyBits());
    //
    //     if (rc2Param.getIV() != null && ivLength != 0)
    //     {
    //         param = new ParametersWithIV(param, rc2Param.getIV());
    //         ivParam = (ParametersWithIV)param;
    //     }
    // }
    // else if (params instanceof RC5ParameterSpec)
    // {
    //     RC5ParameterSpec    rc5Param = (RC5ParameterSpec)params;
    //
    //     param = new RC5Parameters(key.getEncoded(), ((RC5ParameterSpec)params).getRounds());
    //     if (baseEngine.getAlgorithmName().startsWith("RC5"))
    //     {
    //         if (baseEngine.getAlgorithmName().equals("RC5-32"))
    //         {
    //             if (rc5Param.getWordSize() != 32)
    //             {
    //                 throw new InvalidAlgorithmParameterException("RC5 already set up for a word size of 32 not " + rc5Param.getWordSize() + ".");
    //             }
    //         }
    //         else if (baseEngine.getAlgorithmName().equals("RC5-64"))
    //         {
    //             if (rc5Param.getWordSize() != 64)
    //             {
    //                 throw new InvalidAlgorithmParameterException("RC5 already set up for a word size of 64 not " + rc5Param.getWordSize() + ".");
    //             }
    //         }
    //     }
    //     else
    //     {
    //         throw new InvalidAlgorithmParameterException("RC5 parameters passed to a cipher that is not RC5.");
    //     }
    //     if ((rc5Param.getIV() != null) && (ivLength != 0))
    //     {
    //         param = new ParametersWithIV(param, rc5Param.getIV());
    //         ivParam = (ParametersWithIV)param;
    //     }
    // }
    // END android-removed
    {
        throw new InvalidAlgorithmParameterException("unknown parameter type.");
    }
    if ((ivLength != 0) && !(param instanceof ParametersWithIV)) {
        SecureRandom ivRandom = random;
        if (ivRandom == null) {
            ivRandom = new SecureRandom();
        }
        if ((opmode == Cipher.ENCRYPT_MODE) || (opmode == Cipher.WRAP_MODE)) {
            byte[] iv = new byte[ivLength];
            ivRandom.nextBytes(iv);
            param = new ParametersWithIV(param, iv);
            ivParam = (ParametersWithIV) param;
        } else if (cipher.getUnderlyingCipher().getAlgorithmName().indexOf("PGPCFB") < 0) {
            throw new InvalidAlgorithmParameterException("no IV set when one expected");
        }
    }
    if (random != null && padded) {
        param = new ParametersWithRandom(param, random);
    }
    try {
        switch(opmode) {
            case Cipher.ENCRYPT_MODE:
            case Cipher.WRAP_MODE:
                cipher.init(true, param);
                break;
            case Cipher.DECRYPT_MODE:
            case Cipher.UNWRAP_MODE:
                cipher.init(false, param);
                break;
            default:
                throw new InvalidParameterException("unknown opmode " + opmode + " passed");
        }
    } catch (Exception e) {
        throw new InvalidKeyException(e.getMessage());
    }
}