first real commit
This commit is contained in:
Doug Macintosh
159
Gmail.cs
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159
Gmail.cs
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using System;
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using Google.Apis.Auth.OAuth2;
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using Google.Apis.Gmail.v1;
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using Google.Apis.Gmail.v1.Data;
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using Google.Apis.Services;
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using Google.Apis.Util.Store;
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using System.Collections.Generic;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Linq;
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using System.Text.RegularExpressions;
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using System.Runtime.Remoting.Messaging;
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namespace cdrtool
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{
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class Gmail
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{
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static string[] Scopes = { GmailService.Scope.GmailReadonly };
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static string ApplicationName = "Gmail API .NET Quickstart";
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public static async Task<string> GetMail()
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{
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UserCredential credential;
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string mfa_code = "";
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using (var stream = new FileStream("credentials.json", FileMode.Open, FileAccess.Read))
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{
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string credPath = "token.json";
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credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
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GoogleClientSecrets.FromStream(stream).Secrets,
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Scopes,
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"user",
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CancellationToken.None,
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new FileDataStore(credPath, true));
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//Console.WriteLine("Credential file saved to: " + credPath);
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}
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// Create Gmail API service.
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var service = new GmailService(new BaseClientService.Initializer()
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{
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HttpClientInitializer = credential,
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ApplicationName = ApplicationName,
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});
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// Define the timestamp after which we want to find emails (in Unix time format).
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DateTime afterTimestamp = new DateTime(2024, 01, 01); // Use this when you cannot generate a new mfs email to test with
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afterTimestamp = DateTime.Now; // We do this to ensure we get the latest auth email, usually 2-3 seconds after this fires
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long afterUnixTimestamp = ((DateTimeOffset)afterTimestamp).ToUnixTimeSeconds();
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Logger.Log(1,"Awaiting MFA email (max {0}s)", cdrtool.mfa_delay);
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bool repeat = false;
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int count = cdrtool.mfa_delay;
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do
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{
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// Fetch emails received after the given timestamp
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var request = service.Users.Messages.List("me");
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request.Q = $"after:{afterUnixTimestamp} from:\"Rogers SIP Portal\" "; //refinement added Sep16 2024
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ListMessagesResponse response = await request.ExecuteAsync();
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var messages = response.Messages?.OrderByDescending(m => m.InternalDate).ToList();
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repeat = (messages == null);
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//Console.WriteLine("Messages count: {0}", (messages != null) ? messages.Count : 0 );
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if (messages != null && messages.Any())
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{
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//Console.WriteLine("Messages count: {0}",messages.Count);
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var mostRecentMessage = messages.First();
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Message message = await service.Users.Messages.Get("me", mostRecentMessage.Id).ExecuteAsync();
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try
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{
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Regex word = new Regex(@".*Your Portal.+([0-9]{6})"); // MFA looking for 6 digit code //refinement added Sep16 2024
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Match m = word.Match(message.Snippet); // .Snippet easily grabs enough plain text to find the MFA code
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if (m.Success)
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{
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Group g = m.Groups[1];
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//Capture c = g.Captures[0];
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Logger.Log(6, "Regex Match {0} / Group Count {1} / Captures Count {2} / result={3}", m.Success, m.Groups.Count, m.Captures.Count, g.Value);
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int code = Convert.ToInt32(g.Value);
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if ((code >= 0) && (code <= 999999))
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Logger.Log(5, "Code found successfully {0}", code);
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mfa_code = g.Value;
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repeat = false;
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}
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else
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{
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Logger.Log(1, "No code found in email.");
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}
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}
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catch (Exception e)
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{
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Logger.Log(0, "Error parsing Gmail. {0}", e.Message);
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}
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}
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else
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{
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int incr = 1;
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if (count <= (cdrtool.mfa_delay - 5) ) incr = 5;
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count-= incr;
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System.Threading.Thread.Sleep(1000 * incr);
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Logger.Log(1, "No message found for {0}s", cdrtool.mfa_delay - count);
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}
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}
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while (repeat && (count > 0) );
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Logger.Log(0, "Emailed MFA Code : {0}", mfa_code);
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return mfa_code;
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}
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static string GetPlainTextFromMessageParts(IList<MessagePart> parts)
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{
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if (parts == null)
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return string.Empty;
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foreach (var part in parts)
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{
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//Console.WriteLine("email: type:{0}\nbody:\n{1}", part.MimeType, part.Body.Data);
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if (part.MimeType == "text/plain" && part.Body != null && part.Body.Data != null)
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{
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return Base64UrlDecode(part.Body.Data);
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}
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else if (part.Parts != null)
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{
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string text = GetPlainTextFromMessageParts(part.Parts);
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if (!string.IsNullOrEmpty(text))
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return text;
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}
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}
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return string.Empty;
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}
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static string Base64UrlDecode(string input)
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{
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string s = input.Replace('-', '+').Replace('_', '/');
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switch (s.Length % 4)
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{
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case 2: s += "=="; break;
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case 3: s += "="; break;
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}
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var bytes = Convert.FromBase64String(s);
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return System.Text.Encoding.UTF8.GetString(bytes);
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}
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}
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}
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