Exemple #1
0
        public static bool CheckPassword(string password, KeyStore keystore)
        {
            byte[] derivedkey = new byte[32];

            KeyStoreKdfInfo kdf = keystore.Crypto.Kdf;
            KeyStoreAesInfo aes = keystore.Crypto.Aes;

            if (!KeyStoreCrypto.EncryptScrypt(password
                                              , kdf.Params.N
                                              , kdf.Params.R
                                              , kdf.Params.P
                                              , kdf.Params.Dklen
                                              , kdf.Params.Salt
                                              , out derivedkey))
            {
                Console.WriteLine("fail to generate scrypt.");
                return(false);
            }

            byte[] iv         = aes.Params.Iv;
            byte[] ciphertext = aes.Text;
            byte[] mac        = keystore.Crypto.Mac;

            if (!KeyStoreCrypto.VerifyMac(derivedkey, ciphertext, mac))
            {
                Console.WriteLine("Password do not match.");
                return(false);
            }

            return(true);
        }
Exemple #2
0
        public static bool DecryptKeyStore(string password, KeyStore keystore, out byte[] privatekey)
        {
            byte[] derivedkey = new byte[32];

            privatekey = null;

            KeyStoreKdfInfo kdf = keystore.Crypto.Kdf;
            KeyStoreAesInfo aes = keystore.Crypto.Aes;

            if (!KeyStoreCrypto.EncryptScrypt(password
                                              , kdf.Params.N
                                              , kdf.Params.R
                                              , kdf.Params.P
                                              , kdf.Params.Dklen
                                              , kdf.Params.Salt
                                              , out derivedkey))
            {
                Console.WriteLine("fail to generate scrypt.");
                return(false);
            }

            byte[] iv         = aes.Params.Iv;
            byte[] ciphertext = aes.Text;
            byte[] mac        = keystore.Crypto.Mac;

            if (!KeyStoreCrypto.VerifyMac(derivedkey, ciphertext, mac))
            {
                Console.WriteLine("Password do not match.");
                return(false);
            }

            byte[] cipherkey = KeyStoreCrypto.GenerateCipherKey(derivedkey);

            privatekey = new byte[32];
            using (var am = new Aes128CounterMode(iv))
                using (var ict = am.CreateDecryptor(cipherkey, null))
                {
                    ict.TransformBlock(ciphertext, 0, ciphertext.Length, privatekey, 0);
                }
            return(true);
        }