public string ToKeyString(string password, KeyOptions opts)
{
return(JsonConvert.SerializeObject(ToKey(password, opts)));
}
/**
* Generate key by passphrase and options.
*
* @param {Password} password - Provided password.
* @param {KeyOptions} opts - Key options.
*
* @return {Key} Key Object.
*
* @example var key = account.toKey("passphrase");
*/
public Key ToKey(string password, KeyOptions opts = null)
{
byte[] derivedKey;
if (opts.kdf == KDFEnum.Pbkdf2)
{
RNGCryptoServiceProvider crypto = new RNGCryptoServiceProvider();
crypto.GetBytes(opts.salt);
Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(password, opts.salt, opts.c);
derivedKey = pbkdf2.GetBytes(opts.dklen);
}
else if (opts.kdf == KDFEnum.Scrypt)
{
//derivedKey = Replicon.Cryptography.SCrypt.SCrypt.DeriveKey(Encoding.UTF8.GetBytes(password), opts.salt, (ulong)opts.n, (uint)opts.r, (uint)opts.p, (uint)opts.dklen);
derivedKey = ScryptUtil.Scrypt(Encoding.UTF8.GetBytes(password), opts.salt, opts.n, opts.r, opts.p, opts.dklen);
}
else
{
throw new Exception("Unsupported kdf");
}
var iv = opts.iv.Slice(0, opts.iv.Length);
Aes128CTR aes = new Aes128CTR(iv);
byte[] key = derivedKey.Slice(0, 16);
byte[] src = GetPrivateKey();
byte[] dest;
using (ICryptoTransform encrypt = aes.CreateEncryptor(key, null))
{
dest = encrypt.TransformFinalBlock(src, 0, src.Length);
//encrypt.TransformBlock(src, 0, src.Length, dest, 0);
}
byte[] ciphertext = ByteUtil.Merge(dest, new byte[] { });
var algoStr = opts.cipher;
var algoBuf = Encoding.UTF8.GetBytes(algoStr);
var data = ByteUtil.Merge(derivedKey.Slice(16, 32), ciphertext, opts.iv, algoBuf);
bool bl = data.Compare(new byte[] { 29, 52, 224, 140, 175, 174, 254, 246, 150, 111, 54, 131, 20, 66, 32, 30, 74, 150, 12, 191, 5, 61, 192, 196, 41, 236, 65, 21, 61, 184, 251, 34, 181, 156, 116, 62, 192, 63, 123, 193, 144, 210, 110, 229, 144, 235, 148, 57, 174, 176, 29, 188, 185, 223, 149, 83, 130, 30, 94, 120, 100, 252, 2, 217, 97, 101, 115, 45, 49, 50, 56, 45, 99, 116, 114 });
byte[] mac = Sha3Util.Get256Hash(data);
return(new Key
{
version = KEYCURRENTVERSION,
id = Guid.NewGuid().ToString(),
address = GetAddressString(),
crypto = new KeyCrypto
{
ciphertext = ciphertext.ToHex(),
cipherparams = new CipherParams()
{
iv = opts.iv.ToHex()
},
cipher = opts.cipher,
kdf = Enum.GetName(typeof(KDFEnum), opts.kdf).ToLower(),
kdfparams = new KDFParams {
c = opts.c,
salt = opts.salt.ToHex(),
dklen = opts.dklen,
n = opts.n,
p = opts.p,
prf = (opts.kdf == KDFEnum.Pbkdf2) ? "hmac-sha256" : "",
r = opts.r
},
mac = mac.ToHex(),
machash = "sha3256"
}
});
}