Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicPythonRubySQL ServerSwiftTclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcel

Objective-C Examples


ASN.1
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Bounced Email
Box
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
ECC
Email Object
Encryption
FTP
Facebook
Firebase
GeoOp
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Gzip
HTML-to-XML/Text
HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)

Java KeyStore (JKS)
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
PayPal
Peoplevox
QuickBooks
REST
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Shopify
Socket/SSL/TLS
Spider
Stream
Stripe
SugarCRM
Tar Archive
Twitter
VoiceBase
Walmart
WebSocket
XML
XML Digital Signatures
XMP
Xero
Zip
curl
eBay

 

 

 

(Objective-C) OAuth2 GMail IMAP Authentication

Demonstrates how to authenticate with GMail (for IMAP) using XOAUTH2 authentication. The 1st step is to obtain a temporary access token from the Google OAuth 2.0 Authorization Server. This can be accomplished using Chilkat HTTP.

Once the access token is obtained, it may be used to authenticate. The access token may be used for subsequent authentications while it is valid. Once it expires, a new access token needs to be obtained (using the same procedure).

IMPORTANT: This is an example that uses two-legged OAuth2 with a Google Apps GMail account (not a consumer GMail account). See Why does GMail OAuth2 fail for my consumer GMail.com account. for more information.

Chilkat Objective-C Library Downloads

MAC OS X (Cocoa) Libs

iOS Libs

#import "CkoHttp.h"
#import "CkoCert.h"
#import "NSString.h"
#import "CkoImap.h"



CkoHttp *http = [[CkoHttp alloc] init];

BOOL success;

//  Any string unlocks the component for the 1st 30-days.
success = [http UnlockComponent: @"Anything for 30-day trial"];
if (success != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

//  When a service account (Client ID) is created at https://code.google.com/apis/console/
//  Google will generate a P12 key.  This is a PKCS12 (PFX) file that you will download
//  and save.  The password to access the contents of this file is "notasecret".
//  NOTE: The Chilkat Pfx API provides the ability to load a PFX/P12 and re-save
//  with a different password.

//  Begin by loading the downloaded .p12 into a Chilkat certificate object:
CkoCert *cert = [[CkoCert alloc] init];
success = [cert LoadPfxFile: @"/myDir/API Project-1c43a291e2a1-notasecret.p12" password: @"notasecret"];
if (success != YES) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

//  The next (and final) step is to request the access token.  Chilkat internally
//  does all the work of forming the JWT header and JWT claim set, encoding and
//  signing the JWT, and sending the access token request.
//  The application need only provide the inputs: The iss, scope(s), sub, and the
//  desired duration with a max of 3600 seconds (1 hour).
// 
//  Each of these inputs is defined as follows
//  (see https://developers.google.com/accounts/docs/OAuth2ServiceAccount
//  iss: The email address of the service account.
//  scope: A space-delimited list of the permissions that the application requests.
//  sub: The email address of the user for which the application is requesting delegated access.
//       The sub may be empty if there is no delegation. (This is typical.)
//  numSec: The number of seconds for which the access token will be valid (max 3600).

NSString *iss = @"761326798069-r5mljlln1rd4lrbhg75efgigp36m78j5@developer.gserviceaccount.com";
NSString *scope = @"https://mail.google.com/";
NSString *sub = @"";
int numSec = 3600;

NSString *accessToken = [http G_SvcOauthAccessToken: iss scope: scope subEmail: sub numSec: [NSNumber numberWithInt: numSec] cert: cert];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}
else {
    NSLog(@"%@%@",@"access token: ",accessToken);
}

//  Now that we have the access token, it may be used to authenticate via XOAUTH2 with GMail:

CkoImap *imap = [[CkoImap alloc] init];

//  Anything unlocks the component and begins a fully-functional 30-day trial.
success = [imap UnlockComponent: @"Anything for 30-day trial"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

//  GMail's IMAP service uses SSL and port 993.
imap.Ssl = YES;
imap.Port = [NSNumber numberWithInt:993];

//  Connect to the GMail IMAP server.
success = [imap Connect: @"imap.gmail.com"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

//  Indicate that XOAUTH2 authentication is to be used:
imap.AuthMethod = @"XOAUTH2";

//  Login
//  The username must be the email address used for the "sub" argument when getting
//  the access token.  Instead of using a password, pass the access token in the 2nd argument:
success = [imap Login: @"user@your-domain.com" password: accessToken];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
}
else {
    NSLog(@"%@",@"Successfully authenticate with GMail IMAP using XOAUTH2!");
}


 

© 2000-2016 Chilkat Software, Inc. All Rights Reserved.