public StorageClient(string apiEndpoint, string key, string id) : base(apiEndpoint + "/")
{
credential = new HawkNet.HawkCredential()
{
Algorithm = "sha256", Id = id, Key = BinaryHelper.ToHexString(Encoding.UTF8.GetBytes(key))
};
}
// https://github.com/hueniverse/hawk/blob/master/lib/client.js
// https://github.com/mozilla/fxa-python-client
private AuthenticationHeaderValue GetHawkAuthenticationHeader(HttpMethod method, string requestUri, string jsonPayload, string token, string context, int size)
{
string tokenId;
string reqHMACkey;
using (var hmac = new HMACSHA256())
{
HKDF hkdf = new HKDF(hmac, BinaryHelper.FromHexString(token));
byte[] sessionToken = hkdf.Expand(BinaryHelper.Kw(context), size);
string buffer = BinaryHelper.ToHexString(sessionToken);
tokenId = buffer.Substring(0, 64);
reqHMACkey = buffer.Substring(64, 64);
}
HawkNet.HawkCredential credential =
new HawkNet.HawkCredential()
{
Algorithm = "sha256", Key = reqHMACkey, Id = tokenId
};
return(GetHawkAuthenticationHeader(method, requestUri, jsonPayload, credential));
}
protected Task Get(string requestUri, HawkNet.HawkCredential credential)
{
AuthenticationHeaderValue authenticationHeader = GetHawkAuthenticationHeader(HttpMethod.Get, requestUri, null, credential);
return(Task.Run(() => Execute(HttpMethod.Get, requestUri, null, null, authenticationHeader, null)));
}
protected Task <TResponse> Get <TResponse>(string requestUri, HawkNet.HawkCredential credential)
{
AuthenticationHeaderValue authenticationHeader = GetHawkAuthenticationHeader(HttpMethod.Get, requestUri, null, credential);
return(Task.Run(() => (TResponse)Execute(HttpMethod.Get, requestUri, null, typeof(TResponse), authenticationHeader, null)));
}
private AuthenticationHeaderValue GetHawkAuthenticationHeader(HttpMethod method, string requestUri, string jsonPayload, HawkNet.HawkCredential credential)
{
string parameter = HawkNet.Hawk.GetAuthorizationHeader(
httpClient.BaseAddress.DnsSafeHost,
method.ToString().ToUpperInvariant(),
new Uri(httpClient.BaseAddress, requestUri),
credential,
payloadHash: HawkNet.Hawk.CalculatePayloadHash(jsonPayload, "application/json", credential));
return(new AuthenticationHeaderValue("Hawk", parameter));
}
