public bool IsValidSignature(string accessKey, string signature, DateTime date, string path)
{
var message = Secret.BuildMessage(date, path);
var computeSignature = Hmacsha1.ComputeSignature(Secret.GetSecretKey(accessKey), message);
return(signature.Equals(computeSignature));
}
public void SignAndCompareWithSameData()
{
var ressource = "/test";
var secretKey = Secret.GetSecretKey(Secret.AccessKeyId);
var date = DateTime.UtcNow;
var message = Secret.BuildMessage(date, ressource);
var signature = Hmacsha1.ComputeSignature(secretKey, message);
var signature2 = Hmacsha1.ComputeSignature(secretKey, message);
Assert.True(signature == signature2);
}
public void SignAndCompareWithDifferentDate()
{
var ressource = "/test";
var secretKey = Secret.GetSecretKey(Secret.AccessKeyId);
var firsDate = DateTime.UtcNow;
var secondDate = firsDate.AddSeconds(1);
var firstMessage = Secret.BuildMessage(firsDate, ressource);
var secondMessage = Secret.BuildMessage(secondDate, ressource);
var signature = Hmacsha1.ComputeSignature(secretKey, firstMessage);
var signature2 = Hmacsha1.ComputeSignature(secretKey, secondMessage);
Assert.True(signature != signature2);
}
public bool Authenticate(string email)
{
var query = $"{AuthenticateUri}/{WebUtility.UrlEncode(email)}";
using (var client = new HttpClient {
BaseAddress = new Uri(BaseAddress)
})
{
var date = DateTime.UtcNow;
var message = Secret.BuildMessage(date, AuthenticateUri);
var signature = Hmacsha1.ComputeSignature(Secret.GetSecretKey(Secret.AccessKeyId), message);
client.AddHeader(Secret.AccessKeyId, signature, date);
var response = client.GetAsync(query).Result;
return(WebHelper.Deserialize <bool>(response));
}
}
public async Task Invoke(HttpContext context)
{
var typed = context.Request.GetTypedHeaders();
string value = context.Request.Headers["Authorization"];
var values = value.Split(":");
var date = typed.Date.Value.UtcDateTime;
var keyId = values[0].Replace("Authorization ", "");
var signature = values[1];
var message = Secret.BuildMessage(date, AuthenticateUri);
var computeSignature = Hmacsha1.ComputeSignature(Secret.GetSecretKey(keyId), message);
var result = signature.Equals(computeSignature);
if (!result)
{
context.Abort();
}
await _next?.Invoke(context);
}
