Example #1
0
 internal static extern uint NCryptVerifySignature(SafeNCryptKeyHandle hKey,
                                                   ref BCrypt.BCRYPT_PSS_PADDING_INFO pPaddingInfo,
                                                   byte[] pbHashValue,
                                                   int cbHashValue,
                                                   byte[] pbSignature,
                                                   int cbSignature,
                                                   uint dwFlags);
Example #2
0
 internal static extern uint NCryptSignHash(SafeNCryptKeyHandle hKey,
                                            ref BCrypt.BCRYPT_PSS_PADDING_INFO pPaddingInfo,
                                            byte[] pbHashValue,
                                            int cbHashValue,
                                            byte[] pbSignature,
                                            int cbSignature,
                                            out uint pcbResult,
                                            uint dwFlags);
Example #3
0
        private static bool VerifyHash(byte[] hash, byte[] signature, CngKey key, string algorithm, int saltSize)
        {
            var paddingInfo = new BCrypt.BCRYPT_PSS_PADDING_INFO(algorithm, saltSize);

            uint status = NCrypt.NCryptVerifySignature(key.Handle, ref paddingInfo, hash, hash.Length, signature, signature.Length, BCrypt.BCRYPT_PAD_PSS);

            if (status == NCrypt.NTE_BAD_SIGNATURE) //honestly it always failing with NTE_INVALID_PARAMETER, but let's stick to public API
                return false;

            if (status != BCrypt.ERROR_SUCCESS)
                throw new CryptographicException(string.Format("NCrypt.NCryptSignHash() (signature size) failed with status code:{0}", status));

            return true;
        }
Example #4
0
        private static byte[] SignHash(byte[] hash, CngKey key, string algorithm, int saltSize)
        {
            var paddingIndo=new BCrypt.BCRYPT_PSS_PADDING_INFO(algorithm, saltSize);

            uint size;
            uint status;

            status = NCrypt.NCryptSignHash(key.Handle, ref paddingIndo, hash, hash.Length, null, 0, out size,BCrypt.BCRYPT_PAD_PSS);

            if (status != BCrypt.ERROR_SUCCESS)
                throw new CryptographicException(string.Format("NCrypt.NCryptSignHash() (signature size) failed with status code:{0}", status));

            byte[] signature=new byte[size];

            status = NCrypt.NCryptSignHash(key.Handle, ref paddingIndo, hash, hash.Length, signature, signature.Length, out size, BCrypt.BCRYPT_PAD_PSS);

            if (status != BCrypt.ERROR_SUCCESS)
                throw new CryptographicException(string.Format("NCrypt.NCryptSignHash() failed with status code:{0}", status));

            return signature;
        }