Perl

Authorization Code Flow with PKCE for Native Apps

See more Okta OAuth/OIDC Examples

Demonstrates the authorization code flow with Proof Key for Code Exchange (PKCE) for native apps. In Okta, your app should be defined as shown: Perl

use chilkat();

$success = 0;

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$oauth2 = chilkat::CkOAuth2->new();

# This should be the port in the Login redirect URI for your app.  
# Your app's Login redirect URI should be "http://localhost:3017/" if the port number is 3017.
$oauth2->put_ListenPort(3017);

$oauth2->put_AuthorizationEndpoint("https://{yourOktaDomain}/oauth2/default/v1/authorize");
$oauth2->put_TokenEndpoint("https://{yourOktaDomain}/oauth2/default/v1/token");

# Replace these with actual values.
$oauth2->put_ClientId("OKTA_CLIENT_ID");
$oauth2->put_ClientSecret("OKTA_CLIENT_SECRET");

$oauth2->put_CodeChallenge(1);
$oauth2->put_IncludeNonce(1);

# Make sure to include "offline_access" to get a refresh token included in the final JSON response.
# Add any additional needed scopes separated by space chars.
$oauth2->put_Scope("openid offline_access");

# Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
$url = $oauth2->startAuth();
if ($oauth2->get_LastMethodSuccess() == 0) {
    print $oauth2->lastErrorText() . "\r\n";
    exit;
}

print "URL to load in browser: " . $url . "\r\n";

# Launch the system's default browser navigated to the URL.
$success = $oauth2->LaunchBrowser($url);
if ($success == 0) {
    print $oauth2->lastErrorText() . "\r\n";
    exit;
}

# Now wait for the authorization.
# We'll wait for a max of 60 seconds.
$numMsWaited = 0;
while (($numMsWaited < 60000) and ($oauth2->get_AuthFlowState() < 3)) {
    $oauth2->SleepMs(100);
    $numMsWaited = $numMsWaited + 100;
}

# If there was no response from the browser within 30 seconds, then 
# the AuthFlowState will be equal to 1 or 2.
# 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
# 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
# In that case, cancel the background task started in the call to StartAuth.
if ($oauth2->get_AuthFlowState() < 3) {
    $oauth2->Cancel();
    print "No response from the browser!" . "\r\n";
    exit;
}

# Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
# The possible AuthFlowState values are:
# 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
# 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
# 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
if ($oauth2->get_AuthFlowState() == 5) {
    print "OAuth2 failed to complete." . "\r\n";
    print $oauth2->failureInfo() . "\r\n";
    exit;
}

if ($oauth2->get_AuthFlowState() == 4) {
    print "OAuth2 authorization was denied." . "\r\n";
    print $oauth2->accessTokenResponse() . "\r\n";
    exit;
}

if ($oauth2->get_AuthFlowState() != 3) {
    print "Unexpected AuthFlowState:" . $oauth2->get_AuthFlowState() . "\r\n";
    exit;
}

print "OAuth2 authorization granted!" . "\r\n";
print "Access Token = " . $oauth2->accessToken() . "\r\n";

# Get the full JSON response:
$json = chilkat::CkJsonObject->new();
$json->Load($oauth2->accessTokenResponse());
$json->put_EmitCompact(0);
print $json->emit() . "\r\n";

# The JSON response looks like this:

# {
#   "access_token": "eyJraWQi ... Kn4IiEfOw",
#   "token_type": "Bearer",
#   "expires_in": 3600,
#   "scope": "offline_access openid",
#   "refresh_token": "0jCqotuuUegdjNzB9uuSsfGM2Cu5HnCHUxoJ0yhZ4rs",
#   "id_token": "eyJraWQiO ... 09WGEq3dTRmQF86PzJg"
# }

# Save the JSON to a file for future requests.
$fac = chilkat::CkFileAccess->new();
$fac->WriteEntireTextFile("qa_data/tokens/okta.json",$json->emit(),"utf-8",0);