Examples with RC2KeyParameters org.xwiki.crypto.params.cipher.symmetric.RC2KeyParameters used on opensource projects

Example 1 with RC2KeyParameters

use of org.xwiki.crypto.params.cipher.symmetric.RC2KeyParameters in project xwiki-commons by xwiki.

the class BcPBES2Rc2CipherFactory method getInstance.

@Override
public PasswordBasedCipher getInstance(boolean forEncryption, SymmetricCipherParameters password, KeyDerivationFunction kdf) {
    KeyWithIVParameters params;
    if (password instanceof KeyWithIVParameters) {
        KeyParameter passkey = ((KeyWithIVParameters) password).getKeyParameter();
        if (passkey instanceof RC2KeyParameters) {
            params = new KeyWithIVParameters(new RC2KeyParameters(kdf.derive(passkey.getKey()).getKey(), ((RC2KeyParameters) passkey).getEffectiveBits()), ((KeyWithIVParameters) password).getIV());
        } else {
            params = new KeyWithIVParameters(kdf.derive(((KeyWithIVParameters) password).getKey()), ((KeyWithIVParameters) password).getIV());
        }
    } else if (password instanceof RC2KeyParameters) {
        params = kdf.derive(((KeyParameter) password).getKey(), getIVSize());
        params = new KeyWithIVParameters(new RC2KeyParameters(params.getKey(), ((RC2KeyParameters) password).getEffectiveBits()), params.getIV());
    } else if (password instanceof KeyParameter) {
        params = kdf.derive(((KeyParameter) password).getKey(), getIVSize());
    } else {
        throw new IllegalArgumentException("Invalid cipher parameters for RC2 password based cipher: " + password.getClass().getName());
    }
    // ensure RC2Version is computable
    getRC2Version(params);
    return getPasswordBasedCipher(forEncryption, kdf, params);
}

Example 2 with RC2KeyParameters

use of org.xwiki.crypto.params.cipher.symmetric.RC2KeyParameters in project xwiki-commons by xwiki.

the class BcRc2CbcPaddedCipherFactoryTest method testRC2EffectiveBitsDecription.

@Test
public void testRC2EffectiveBitsDecription() throws Exception {
    Cipher cipher27Enc = factory.getInstance(true, new KeyWithIVParameters(new RC2KeyParameters(KEY32, 27), IV8));
    Cipher cipher27 = factory.getInstance(false, new KeyWithIVParameters(new RC2KeyParameters(KEY32, 27), IV8));
    byte[] result = cipher27.doFinal(cipher27Enc.doFinal(BYTES));
    assertThat(result.length, equalTo(BYTES.length));
    assertThat(result, equalTo(BYTES));
    result = cipher27.doFinal(cipher27Enc.doFinal(ANOTHER_BYTES));
    assertThat(result.length, equalTo(ANOTHER_BYTES.length));
    assertThat(result, equalTo(ANOTHER_BYTES));
}

Example 3 with RC2KeyParameters

use of org.xwiki.crypto.params.cipher.symmetric.RC2KeyParameters in project xwiki-commons by xwiki.

the class BcPBES2Rc2CipherFactory method getRC2Version.

private int getRC2Version(KeyWithIVParameters parameters) {
    KeyParameter keyParams = parameters.getKeyParameter();
    int keySize;
    if (keyParams instanceof RC2KeyParameters) {
        keySize = ((RC2KeyParameters) keyParams).getEffectiveBits();
    } else {
        keySize = keyParams.getKey().length * 8;
    }
    switch(keySize) {
        case 40:
            return 160;
        case 64:
            return 120;
        case 128:
            return 58;
        default:
            if (keySize < 256) {
                throw new IllegalArgumentException("Invalid cipher key size for PBES2 RC2 password based cipher: " + keySize + " bits. Valid key size are 40, 64, 128 and 256 and more.");
            }
            return keySize;
    }
}

Example 4 with RC2KeyParameters

use of org.xwiki.crypto.params.cipher.symmetric.RC2KeyParameters in project xwiki-commons by xwiki.

the class BcPBES2Rc2CipherFactory method getRC2CipherParameters.

private SymmetricCipherParameters getRC2CipherParameters(byte[] password, RC2CBCParameter rc2Params, KeyDerivationFunction df) {
    KeyParameter keyParam;
    BigInteger version = rc2Params.getRC2ParameterVersion();
    if (version != null) {
        int bits = getRC2EffectiveBits(version.intValue());
        df.overrideKeySize((bits + 7) / 8);
        keyParam = new RC2KeyParameters(df.derive(password).getKey(), bits);
    } else {
        df.overrideKeySize(4);
        keyParam = new KeyParameter(df.derive(password).getKey());
    }
    return new KeyWithIVParameters(keyParam, rc2Params.getIV());
}

Example 5 with RC2KeyParameters

use of org.xwiki.crypto.params.cipher.symmetric.RC2KeyParameters in project xwiki-commons by xwiki.

the class BcRc2CbcPaddedCipherFactoryTest method testRC2EffectiveBitsEncription.

@Test
public void testRC2EffectiveBitsEncription() throws Exception {
    Cipher cipher27 = factory.getInstance(true, new KeyWithIVParameters(new RC2KeyParameters(KEY32, 27), IV8));
    byte[] result = cipher27.doFinal(BYTES);
    assertThat(result.length, equalTo(BYTES_ENCRYPTED_SIZE));
    assertThat(result, not(equalTo(getEncrypted())));
    result = cipher27.doFinal(ANOTHER_BYTES);
    assertThat(result.length, equalTo(ANOTHER_BYTES_ENCRYPTED_SIZE));
    assertThat(result, not(equalTo(getAnotherEncrypted())));
}