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iosobjective-cgoogle-authenticator

Setting up Google Authenticator from another iOS app in objective-c?

How to automatically launch the Google Authenticator iOS app and send data (issuer, user, secret) from Objective-c code?

This question partially solves for Swift but looking for Objective-c. Automatically launch Google Authenticator app on iOS

Solution

  • As of iOS 9, the first thing you will need to do is whitelist the url scheme by adding this to your Info.plist

    <key>LSApplicationQueriesSchemes</key>
<array>
    <string>otpauth</string>
</array>

    Then to launch into Google Authenticator all you should need to do is this:

    NSString *otpString = @"otpauth://totp/Example:[email protected]?secret=JBSWY3DPEHPK3PXP&issuer=Example";
NSURL *otpURL = [NSURL URLWithString:otpString];
if ([[UIApplication sharedApplication] canOpenURL:otpURL]) {
    [[UIApplication sharedApplication] openURL:otpURL];
}

    • Useful page for generating Google Authenticator URLs.

    • You can look at Google's internal code for parsing the URLs here.