private static string GetContent(byte[] secret, HttpListenerRequest request)
{
var ms = new System.IO.MemoryStream();
request.InputStream.CopyTo(ms);
byte[] bytes = ms.ToArray();
(request.InputStream as IDisposable).Dispose();
var signature = request.Headers.Get("X-Signature");
if (secret != null)
{
using (var hmac = new System.Security.Cryptography.HMACSHA1(secret)) {
hmac.Initialize();
string result = BitConverter.ToString(
hmac.ComputeHash(bytes, 0, bytes.Length)
).Replace("-", "");
if (!string.Equals(
signature,
$"sha1={result}",
StringComparison.OrdinalIgnoreCase
))
{
return(null);
}
}
}
return(request.ContentEncoding.GetString(bytes));
}
public static string HMACSHA1(string text, string passKey)
{
var provider = new System.Security.Cryptography.HMACSHA1(Encoding.ASCII.GetBytes(passKey));
provider.Initialize();
var binary = provider.ComputeHash(Encoding.ASCII.GetBytes(text));
return(Convert.ToBase64String(binary));
}
private string CreateHubSignature(string bodyMessage)
{
var hashResult = string.Empty;
using (var hmac = new System.Security.Cryptography.HMACSHA1(Encoding.UTF8.GetBytes(_appSecret)))
{
hmac.Initialize();
var hashArray = hmac.ComputeHash(Encoding.UTF8.GetBytes(bodyMessage));
var hash = $"SHA1={BitConverter.ToString(hashArray).Replace("-", string.Empty)}";
hashResult = hash;
}
return(hashResult);
}
public byte[] ComputeHash(byte[] data, int offset, int length)
{
_algorithm.Initialize();
return(_algorithm.ComputeHash(data, offset, length));
}
public byte[] Calc(byte[] data)
{
_algorithm.Initialize();
return(_algorithm.ComputeHash(data));
}
