BigInteger p = getBigIntFromBase64UrlEncodedParam(params, FIRST_PRIME_FACTOR_MEMBER_NAME);
BigInteger q = getBigIntFromBase64UrlEncodedParam(params, SECOND_PRIME_FACTOR_MEMBER_NAME);
BigInteger dp = getBigIntFromBase64UrlEncodedParam(params, FIRST_FACTOR_CRT_EXPONENT_MEMBER_NAME);
BigInteger dq = getBigIntFromBase64UrlEncodedParam(params, SECOND_FACTOR_CRT_EXPONENT_MEMBER_NAME);
BigInteger qi = getBigIntFromBase64UrlEncodedParam(params, FIRST_CRT_COEFFICIENT_MEMBER_NAME);
privateKey = rsaKeyUtil.privateKey(modulus, publicExponent, d, p, q, dp, dq, qi);
}
else
{
privateKey = rsaKeyUtil.privateKey(modulus, d);
}