public static async Task <Task> VerifyPayload(
ServerState state,
HTTPRequest request,
Stream body,
IProxyHTTPEncoder encoder)
{
var req = await Util.ReadJsonObjectFromStreamAsync <AuthVerifyPayloadRequest>(body, 1024 * 1024);
var user = state.VerifyPayload(req.challenge, req.chash, req.phash);
if (user == null)
{
return(await encoder.Response(403, "Authentication based on user failed.").SendNothing());
}
var resp = new AuthCheckResponse()
{
payload = "",
success = true,
user = user,
};
return(await encoder.Response(200, "OK").ContentType_JSON().SendJsonFromObject(resp));
}
public static async Task <Task> IsLoginValid(
ServerState state,
HTTPRequest request,
Stream body,
IProxyHTTPEncoder encoder)
{
var msg = await Util.ReadJsonObjectFromStreamAsync <Msg>(body, 1024);
bool valid = false;
User user;
if (msg.payload == null || msg.auth.hash == null)
{
// Ensure the payload can never be accidentally used since this
// authentication is without a payload hash.
msg.payload = null;
user = state.Verify(msg.auth.challenge, msg.auth.chash);
if (user != null)
{
valid = true;
}
}
else
{
var payload_hash = BitConverter.ToString(
new SHA512Managed().ComputeHash(
Encoding.UTF8.GetBytes(msg.payload)
)
).Replace("-", "").ToLower();
user = state.VerifyPayload(
msg.auth.challenge,
msg.auth.chash,
payload_hash /* recompute it */
);
if (user != null)
{
valid = true;
}
}
if (valid)
{
return(await encoder.Response(200, "Login Valid")
.CacheControlDoNotCache()
.ContentType_JSON()
.SendJsonFromObject(new AuthLoginValidResponse()
{
success = true,
user = user,
}));
}
else
{
return(await encoder.Response(403, "The login was not valid.")
.CacheControlDoNotCache()
.ContentType_JSON()
.SendJsonFromObject(new AuthLoginValidResponse()
{
success = false,
user = null,
}));
}
}