/// <summary> /// Returns an AuthenticationResult object corresponding to the result of authentication done /// using the client supplied artifacts in the HTTP authorization header in hawk scheme. /// </summary> /// <param name="now">Current UNIX time in milliseconds.</param> /// <param name="request">Request object.</param> /// <param name="options">Hawk authentication options</param> /// <returns></returns> internal static async Task <AuthenticationResult> AuthenticateAsync(ulong now, IRequestMessage request, Options options) { ArtifactsContainer artifacts = null; Credential credential = null; if (request.HasValidHawkScheme()) { if (ArtifactsContainer.TryParse(request.Authorization.Parameter, out artifacts)) { if (artifacts != null && artifacts.AreClientArtifactsValid) { credential = options.CredentialsCallback(artifacts.Id); if (credential != null && credential.IsValid) { var normalizedRequest = new NormalizedRequest(request, artifacts, options.HostNameSource); var crypto = new Cryptographer(normalizedRequest, artifacts, credential); // Request body is needed only when payload hash is present in the request string body = null; if (artifacts.PayloadHash != null && artifacts.PayloadHash.Length > 0) { body = await request.ReadBodyAsStringAsync(); } if (crypto.IsSignatureValid(body, request.ContentType)) // MAC and hash checks { if (IsTimestampFresh(now, artifacts, options)) { // If you get this far, you are authentic. Welcome and thanks for flying Hawk! return(new AuthenticationResult() { IsAuthentic = true, Artifacts = artifacts, Credential = credential, ApplicationSpecificData = artifacts.ApplicationSpecificData }); } else { // Authentic but for the timestamp freshness. // Give a chance to the client to correct the clocks skew. var timestamp = new NormalizedTimestamp(DateTime.UtcNow, credential, options.LocalTimeOffsetMillis); request.ChallengeParameter = timestamp.ToWwwAuthenticateHeaderParameter(); } } } } } } return(new AuthenticationResult() { IsAuthentic = false }); }
/// <summary> /// Returns an AuthenticationResult object corresponding to the result of authentication done /// using the client supplied artifacts in the HTTP authorization header in hawk scheme. /// </summary> /// <param name="now">Current UNIX time in milliseconds.</param> /// <param name="request">Request object.</param> /// <param name="options">Hawk authentication options</param> /// <returns></returns> internal static async Task <AuthenticationResult> AuthenticateAsync(ulong now, IRequestMessage request, Options options) { ArtifactsContainer artifacts = null; Credential credential = null; if (request.HasValidHawkScheme()) { if (ArtifactsContainer.TryParse(request.Authorization.Parameter, out artifacts)) { if (artifacts != null && artifacts.AreClientArtifactsValid) { string lastUsedBy = options.DetermineNonceReplayCallback(artifacts.Nonce); if (String.IsNullOrEmpty(lastUsedBy)) // Not an old nonce, and hence not a replay. { credential = options.CredentialsCallback(artifacts.Id); if (credential != null && credential.IsValid) { HawkEventSource.Log.Debug( String.Format("Algorithm={0} Key={1} ID={2}", credential.Algorithm.ToString(), Convert.ToBase64String(credential.Key), credential.Id)); Tuple <string, string> hostAndPort = options.DetermineHostDetailsCallback(request); var normalizedRequest = new NormalizedRequest(request, artifacts, hostAndPort.Item1, hostAndPort.Item2); var crypto = new Cryptographer(normalizedRequest, artifacts, credential); // Request body is needed only when payload hash is present in the request string body = null; if (artifacts.PayloadHash != null && artifacts.PayloadHash.Length > 0) { body = await request.ReadBodyAsStringAsync(); } if (crypto.IsSignatureValid(body, request.ContentType)) // MAC and hash checks { if (IsTimestampFresh(now, artifacts, options)) { // If you get this far, you are authentic. Welcome and thanks for flying Hawk! // Before returning the result, store nonce to detect replays. options.StoreNonceCallback(artifacts.Nonce, credential.Id, options.ClockSkewSeconds); return(new AuthenticationResult() { IsAuthentic = true, Artifacts = artifacts, Credential = credential, ApplicationSpecificData = artifacts.ApplicationSpecificData }); } else { // Authentic but for the timestamp freshness. // Give a chance to the client to correct the clocks skew. var timestamp = new NormalizedTimestamp(DateTime.UtcNow, credential, options.LocalTimeOffsetMillis); request.ChallengeParameter = timestamp.ToWwwAuthenticateHeaderParameter(); } } } } else { HawkEventSource.Log.NonceReplay(artifacts.Nonce, lastUsedBy); } } } } return(new AuthenticationResult() { IsAuthentic = false }); }