nathanwoodburn/FireWallet
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main: Attempted to add seed phrase decryption

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This commit is contained in:
Nathan Woodburn 2023-06-16 15:36:58 +10:00
parent a024ce7afc
commit f371f3da49
Signed by: nathanwoodburn
GPG Key ID: 203B000478AD0EF1
1 changed files with 86 additions and 1 deletions
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87
FireWallet/MainForm.cs
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@ -14,6 +14,7 @@ using DnsClient;
using DnsClient.Protocol;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
using System.Numerics;
namespace FireWallet
{
@ -686,6 +687,7 @@ namespace FireWallet
toolStripStatusLabelLedger.Text = "Cold Wallet";
toolStripStatusLabelLedger.Visible = true;
buttonRevealAll.Visible = false;
buttonSeed.Enabled = false;
}
else
@ -693,6 +695,7 @@ namespace FireWallet
watchOnly = false;
toolStripStatusLabelLedger.Visible = false;
buttonRevealAll.Visible = true;
buttonSeed.Enabled = true;
}
@ -864,7 +867,6 @@ namespace FireWallet
{
AddLog("Post Error: " + ex.Message);
AddLog(await resp.Content.ReadAsStringAsync());
AddLog("Content: " + content);
return "Error";
}
@ -2175,6 +2177,8 @@ namespace FireWallet
try
{
AddLog("Decrypting seed...");
AddLog(resp.ToString());
string iv = resp["iv"].ToString();
string ciphertext = resp["ciphertext"].ToString();
string tmpn = resp["n"].ToString();
@ -2183,9 +2187,26 @@ namespace FireWallet
int n = int.Parse(tmpn);
int p = int.Parse(tmpp);
int r = int.Parse(tmpr);
int iterations = n;
byte[] decripted = await Decrypt_Seed(algorithm, ciphertext, iv, n,r,p);
// This is returning garbled text
AddLog("Seed decrypted");
string phrase = Encoding.UTF8.GetString(decripted);
AddLog("Your seed phrase is:\n" + phrase);
phrase = Encoding.ASCII.GetString(decripted);
AddLog("Your seed phrase is:\n" + phrase);
phrase = Encoding.Unicode.GetString(decripted);
AddLog("Your seed phrase is:\n" + phrase);
}
catch (Exception ex)
@ -2200,7 +2221,71 @@ namespace FireWallet
}
}
private async Task<byte[]> Decrypt_Seed(string algorithm, string ciphertext, string iv, int n,int r, int p)
{
byte[] salt = Encoding.ASCII.GetBytes("hsd");
using (AesManaged aes = new AesManaged())
{
aes.Key = DeriveKey(algorithm, password, salt, n, r, p);
aes.IV = HexStringToByteArray(iv);
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
byte[] cipher = HexStringToByteArray(ciphertext);
if (cipher.Length % 16 != 0)
{
AddLog("Invalid cipher length");
return null;
}
using (ICryptoTransform decryptor = aes.CreateDecryptor())
{
byte[] decrypted = decryptor.TransformFinalBlock(cipher, 0, cipher.Length);
return decrypted;
}
}
}
static byte[] HexStringToByteArray(string hex)
{
int numberChars = hex.Length / 2;
byte[] bytes = new byte[numberChars];
for (int i = 0; i < numberChars; i++)
{
bytes[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
}
return bytes;
}
byte[] DeriveKey(string algorithm, string passphrase, byte[] salt, int n, int r, int p)
{
byte[] passwordBytes = Encoding.UTF8.GetBytes(passphrase);
switch (algorithm)
{
case "pbkdf2":
return Pbkdf2DeriveKey(passwordBytes, salt, n, 32);
case "scrypt":
return ScryptDeriveKey(passwordBytes, salt, n, r, p, 32);
default:
throw new Exception($"Unknown algorithm: {algorithm}.");
}
}
static byte[] Pbkdf2DeriveKey(byte[] password, byte[] salt, int iterations, int derivedKeyLength)
{
using (Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(password, salt, iterations))
{
return pbkdf2.GetBytes(derivedKeyLength);
}
}
static byte[] ScryptDeriveKey(byte[] password, byte[] salt, int costParameterN, int costParameterR, int costParameterP, int derivedKeyLength)
{
using (var rfc2898 = new Rfc2898DeriveBytes(password, salt, costParameterN, HashAlgorithmName.SHA256))
{
return rfc2898.GetBytes(derivedKeyLength);
}
}
private async void Rescan_Click(object sender, EventArgs e)
{
string content = "{\"height\": 0}";