public static EcKey CreateEcKeyFromHexString(string privateKey)
{
var pkey = new BigInteger(privateKey, 16);
var key = new EcKey(pkey);
return(key);
}
public static EcKey createEcKeyFromHexString(String privateKey)
{
BigInteger pkey = new BigInteger(privateKey, 16);
EcKey key = new EcKey(pkey);
return(key);
}
public static String deriveSIN(EcKey ecKey)
{
// Get sha256 hash and then the RIPEMD-160 hash of the public key (this call gets the result in one step).
byte[] pubKeyHash = ecKey.PubKeyHash;
// Convert binary pubKeyHash, SINtype and version to Hex
String version = "0F";
String SINtype = "02";
String pubKeyHashHex = bytesToHex(pubKeyHash);
// Concatenate all three elements
String preSIN = version + SINtype + pubKeyHashHex;
// Convert the hex string back to binary and double sha256 hash it leaving in binary both times
byte[] preSINbyte = hexToBytes(preSIN);
byte[] hash2Bytes = Utils.DoubleDigest(preSINbyte);
// Convert back to hex and take first four bytes
String hashString = bytesToHex(hash2Bytes);
String first4Bytes = hashString.Substring(0, 8);
// Append first four bytes to fully appended SIN string
String unencoded = preSIN + first4Bytes;
byte[] unencodedBytes = new BigInteger(unencoded, 16).ToByteArray();
String encoded = Base58.Encode(unencodedBytes);
return(encoded);
}
public static void saveEcKey(EcKey ecKey)
{
byte[] bytes = ecKey.ToAsn1();
FileStream fs = new FileStream(GetPrivateKeyFullName(), FileMode.Create, FileAccess.Write);
fs.Write(bytes, 0, bytes.Length);
fs.Close();
}
public static void saveEcKey(EcKey ecKey, string path)
{
byte[] bytes = ecKey.ToAsn1();
FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write);
fs.Write(bytes, 0, bytes.Length);
fs.Close();
}
public static void saveEcKey(EcKey ecKey)
{
byte[] bytes = ecKey.ToAsn1();
FileStream fs = new FileStream(PRIV_KEY_FILENAME, FileMode.Create, FileAccess.Write);
fs.Write(bytes, 0, bytes.Length);
fs.Close();
}
public static async Task <EcKey> LoadEcKey()
{
using (var fs = File.OpenRead(PrivateKeyFilename)) {
var b = new byte[1024];
await fs.ReadAsync(b, 0, b.Length);
var key = EcKey.FromAsn1(b);
return(key);
}
}
/// <summary>
/// Signs the input string with the provided key
/// </summary>
/// <param name="ecKey">The key object to sign with</param>
/// <param name="input">The string to be signed</param>
/// <returns>The signature</returns>
public static string Sign(EcKey ecKey, string input)
{
// return ecKey.Sign(input);
var hash = Sha256Hash(input);
var hashBytes = HexToBytes(hash);
var signature = ecKey.Sign(hashBytes);
var bytesHex = BytesToHex(signature);
return(bytesHex);
}
public static EcKey loadEcKey()
{
using (FileStream fs = File.OpenRead(GetPrivateKeyFullName()))
{
byte[] b = new byte[1024];
fs.Read(b, 0, b.Length);
EcKey key = EcKey.FromAsn1(b);
return(key);
}
}
public static EcKey loadEcKey(string path)
{
using (FileStream fs = File.OpenRead(path))
{
byte[] b = new byte[1024];
fs.Read(b, 0, b.Length);
EcKey key = EcKey.FromAsn1(b);
return(key);
}
}
public static EcKey loadEcKey()
{
using (FileStream fs = File.OpenRead(PRIV_KEY_FILENAME))
{
byte[] b = new byte[1024];
fs.Read(b, 0, b.Length);
EcKey key = EcKey.FromAsn1(b);
return(key);
}
}
/// <summary>
/// Constructor for use if the keys and SIN were derived external to this library.
/// </summary>
/// <param name="ecKey">An elliptical curve key.</param>
/// <param name="clientName">The label for this client.</param>
/// <param name="envUrl">The target server URL.</param>
public BitPay(EcKey ecKey, String clientName = BITPAY_PLUGIN_INFO, String envUrl = BITPAY_URL)
{
// IgnoreBadCertificates();
_ecKey = ecKey;
this.deriveIdentity();
_baseUrl = envUrl;
_httpClient = new HttpClient();
_httpClient.BaseAddress = new Uri(_baseUrl);
this.tryGetAccessTokens();
}
public static async Task SaveEcKey(EcKey ecKey)
{
var bytes = ecKey.ToAsn1();
if (!Directory.Exists(BitPay.TokensFolder))
{
Directory.CreateDirectory(BitPay.TokensFolder);
}
using (var fs = new FileStream(PrivateKeyFilename, FileMode.Create, FileAccess.Write)) {
await fs.WriteAsync(bytes, 0, bytes.Length);
}
}
/// <summary>
/// Initialize the public/private key pair by either loading the existing one or by creating a new one
/// </summary>
/// <returns></returns>
private async Task InitKeys()
{
if (KeyUtils.PrivateKeyExists(_configuration.GetSection("BitPayConfiguration:EnvConfig:" + _env + ":PrivateKeyPath").Value))
{
_ecKey = await KeyUtils.LoadEcKey();
}
else
{
_ecKey = KeyUtils.CreateEcKey();
await KeyUtils.SaveEcKey(_ecKey);
}
}
public static async Task SaveEcKey(EcKey ecKey)
{
var bytes = ecKey.ToAsn1();
if (!string.IsNullOrEmpty(Path.GetDirectoryName(PrivateKeyFile)) && !Directory.Exists(Path.GetDirectoryName(PrivateKeyFile)))
{
Directory.CreateDirectory(Path.GetDirectoryName(PrivateKeyFile));
}
using (var fs = new FileStream(PrivateKeyFile, FileMode.Create, FileAccess.Write))
{
await fs.WriteAsync(bytes, 0, bytes.Length);
}
}
private void initKeys()
{
if (KeyUtils.privateKeyExists())
{
_ecKey = KeyUtils.loadEcKey();
// Alternatively, load your private key from a location you specify.
//_ecKey = KeyUtils.createEcKeyFromHexStringFile("C:\\Users\\Andy\\Documents\\private-key.txt");
}
else
{
_ecKey = KeyUtils.createEcKey();
KeyUtils.saveEcKey(_ecKey);
}
}
/// <summary>
/// Initialize the public/private key pair by either loading the existing one or by creating a new one
/// </summary>
/// <returns></returns>
private async Task InitKeys()
{
if (KeyUtils.PrivateKeyExists())
{
_ecKey = await KeyUtils.LoadEcKey();
// TODO: Alternatively, load your private key from a location you specify.
//_ecKey = KeyUtils.createEcKeyFromHexStringFile("C:\\Users\\Andy\\Documents\\private-key.txt");
}
else
{
_ecKey = KeyUtils.CreateEcKey();
await KeyUtils.SaveEcKey(_ecKey);
}
}
private void initKeys()
{
string path = HttpContext.Current.Server.MapPath("~/App_Start/bitpay_private.key");
if (KeyUtils.privateKeyExists(path))
{
_ecKey = KeyUtils.loadEcKey(path);
// Alternatively, load your private key from a location you specify.
//_ecKey = KeyUtils.createEcKeyFromHexStringFile(path);
}
else
{
_ecKey = KeyUtils.createEcKey();
KeyUtils.saveEcKey(_ecKey, path);
}
}
public static string DeriveSin(EcKey ecKey)
{
if (_derivedSin != null)
{
return(_derivedSin);
}
// Get sha256 hash and then the RIPEMD-160 hash of the public key (this call gets the result in one step).
var pubKey = ecKey.PublicKey;
var hash = new SHA256Managed().ComputeHash(pubKey);
var ripeMd160Digest = new RipeMD160Digest();
ripeMd160Digest.BlockUpdate(hash, 0, hash.Length);
var output = new byte[20];
ripeMd160Digest.DoFinal(output, 0);
var pubKeyHash = output;
// Convert binary pubKeyHash, SINtype and version to Hex
var version = "0F";
var siNtype = "02";
var pubKeyHashHex = BytesToHex(pubKeyHash);
// Concatenate all three elements
var preSin = version + siNtype + pubKeyHashHex;
// Convert the hex string back to binary and double sha256 hash it leaving in binary both times
var preSiNbyte = HexToBytes(preSin);
var hash2Bytes = DoubleDigest(preSiNbyte);
// Convert back to hex and take first four bytes
var hashString = BytesToHex(hash2Bytes);
var first4Bytes = hashString.Substring(0, 8);
// Append first four bytes to fully appended SIN string
var unencoded = preSin + first4Bytes;
var unencodedBytes = new BigInteger(unencoded, 16).ToByteArray();
var encoded = Encode(unencodedBytes);
_derivedSin = encoded;
return(encoded);
}
public static void saveEcKey(EcKey ecKey)
{
saveEcKey(ecKey, PRIV_KEY_FILENAME);
}
public static String sign(EcKey ecKey, String input)
{
String hash = sha256Hash(input);
return(bytesToHex(ecKey.Sign(hexToBytes(hash))));
}
/// <summary>
/// Constructor for use if the keys and SIN were derived external to this library.
/// </summary>
/// <param name="ecKey">An elliptical curve key.</param>
/// <param name="clientName">The label for this client.</param>
/// <param name="envUrl">The target server URL.</param>
public BitPay(EcKey ecKey, string clientName = BitpayPluginInfo, string envUrl = BitpayUrl)
{
_ecKey = ecKey;
Init(clientName, envUrl).Wait();
}