Fix/secure mode session security #40
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Caution Review failedThe pull request is closed. WalkthroughThe update modifies the Changes
Sequence Diagram(s)sequenceDiagram
participant Admin as Admin Page
participant Settings as TawkTo_Settings
Admin ->> Settings: admin_init()
Settings ->> Settings: update_config_version()
Settings -->> Admin: Configuration version updated
sequenceDiagram
participant Visitor as Visitor
participant Tawk as TawkTo
Visitor ->> Tawk: get_visitor_hash(email)
Tawk -->> Visitor: Returns visitor hash
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Actionable comments posted: 1
🧹 Nitpick comments (1)
tawkto/tawkto.php (1)
697-732: Session-based visitor hash logic.
Storing a keyed HMAC usinghash_hmac('sha256', ...)is a robust choice, but note that the user’s email is also stored in the session. Ensure this approach meets your privacy and GDPR obligations if applicable. Otherwise, your solution for generating and caching the hash works soundly.
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tawkto/includes/default_config.php(2 hunks)tawkto/tawkto.php(8 hunks)
🔇 Additional comments (12)
tawkto/includes/default_config.php (4)
4-4: No functional changes, alignment looks fine.
19-19: No functional changes, alignment looks fine.
22-22: No functional changes, alignment looks fine.
25-25: Good addition for versioning.
Adding'config_version' => 0introduces a straightforward way to track configuration changes. This looks good as an initial default.tawkto/tawkto.php (8)
30-30: Straightforward constant declaration.
DefiningTAWK_CONFIG_VERSIONaligns naming with the database option key, which improves clarity.
95-98: Ensuring backward compatibility.
Initializing the config version if it’s missing is a safe approach to avoid undefined states for existing installs.
139-139: Verify the intended frequency of version updates.
RegisteringTAWK_CONFIG_VERSIONwithupdate_config_version()may increment the config version every time settings are saved. If this is intentional, great. Otherwise, consider decoupling it or adding conditions to avoid unwarranted increments.
539-539: Expanded access for decrypting data.
Changing this method to public allows external calls to decrypt. If that’s the intended design, ensure no unintended exposure occurs.
591-591: New session constant.
Using a named constant for the visitor session key helps keep code consistent and maintainable.
607-608: Potential conflicts with caching plugins.
Invokingstart_session()on'init'can cause issues in WordPress environments that rarely rely on native PHP sessions. Verify compatibility with common caching setups.
610-619: Session handling concerns.
Starting a PHP session within WordPress may lead to unexpected behavior or header conflicts, especially if output has already begun. Confirm that your environment and hosting settings support sessions cleanly.
687-689: Hash assignment looks correct.
This ensures the visitor hash is set only if both the email and hash are non-empty.
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Actionable comments posted: 0
🧹 Nitpick comments (1)
tawkto/tawkto.php (1)
683-727:❓ Verification inconclusive
Secure implementation of visitor hash generation.
The implementation includes several important security features:
- Proper session management
- Configuration version checking
- Email verification
- Secure hash generation using HMAC SHA256
This addresses the PR objective of regenerating the hash when the configuration or email changes.
Consider adding session cookie security enhancements:
+if (session_status() === PHP_SESSION_NONE) { + $session_params = session_get_cookie_params(); + session_set_cookie_params( + $session_params["lifetime"], + $session_params["path"], + $session_params["domain"], + true, // secure flag + true // httponly flag + ); session_start(); }Check if any other code handles session in this plugin:
🏁 Script executed:
#!/bin/bash # Check for other session handling code rg "session_start|session_set_cookie_params"Length of output: 85
Improve Session Cookie Security
The implementation of visitor hash generation is secure overall—with proper session initialization, configuration version checking, email verification, and HMAC SHA256 hash generation. The grep output confirms that the only session handling in the plugin is the call to
session_start()intawkto/tawkto.php.To further enhance security and ensure that session cookies are protected, please consider incorporating secure cookie parameters using
session_set_cookie_params(). For example:-if ( session_status() === PHP_SESSION_NONE ) { - session_start(); -} +if ( session_status() === PHP_SESSION_NONE ) { + $session_params = session_get_cookie_params(); + session_set_cookie_params( + $session_params["lifetime"], + $session_params["path"], + $session_params["domain"], + true, // secure flag + true // httponly flag + ); + session_start(); +}This change ensures that session cookies are flagged as secure and HTTP-only, further aligning with modern security practices.
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tawkto/tawkto.php(9 hunks)
🔇 Additional comments (9)
tawkto/tawkto.php (9)
30-30: Good addition of configuration versioning.Adding a constant for tracking configuration version is essential for the secure mode session security enhancement. This will help in regenerating visitor hashes when configurations change.
135-135: Properly registered configuration version setting.The registration hooks the setting to the update_config_version method, following WordPress best practices.
435-439: Improved input validation.Good improvements to the validation logic:
- Trimming the API key to remove any accidental whitespace
- Simplifying the validation check with a direct error call
444-444: Error message simplification.Standardizing the error message is a good practice. It provides a clear message without exposing internal details.
537-537: Improved method visibility and return values.Making the decryption method public is necessary for the visitor hash generation feature. Returning
nullinstead of an empty string on failure makes error checking more consistent and explicit.Also applies to: 542-542, 551-551
649-649: Proper cleanup on deactivation.Including the configuration version in the cleanup process ensures no orphaned data remains when the plugin is deactivated.
589-589: Added session storage for visitor data.This constant will be used to store visitor information in a session, which is a more secure approach than the previous implementation.
673-676: Replaced API key storage with visitor hash.This change aligns perfectly with the PR objective of enhancing security by not storing the API key directly.
330-337:✅ Verification successful
Well-implemented auto-incremental configuration version.
The method properly retrieves the current version and increments it by 1. This ensures that visitor hashes will be regenerated whenever configuration changes occur.
Since this will always increment by 1 on each update, let's verify if there are other places in the code that also increment this value to avoid unnecessary increments:
🏁 Script executed:
#!/bin/bash # Check for other places where TAWK_CONFIG_VERSION is incremented rg -A 2 -B 2 "TAWK_CONFIG_VERSION.*\+|increment.*TAWK_CONFIG_VERSION" --no-ignoreLength of output: 286
Verified Configuration Version Incrementation
The auto-increment logic in
tawkto/tawkto.php(lines 330-337) solely occurs in theupdate_config_version()method, and our search confirms no other instances incrementingTAWK_CONFIG_VERSIONexist elsewhere in the codebase. The implementation correctly retrieves the current version and increments it by 1 to trigger regeneration of visitor hashes upon configuration changes.
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Changes to improve session security:
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