Create documentation and API reference files #14
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- Add concise README.md with quick start guide and badges - Add DOCUMENTATION.md with detailed usage guide and examples - Add API.md with complete API reference for all classes - Add EXAMPLE_APP.md with Laravel example app documentation Documentation includes: - Installation and configuration instructions - Key derivation and encryption mode details - Plain and encrypted SUN message handling - Error handling and security considerations - Multiple real-world usage examples - WebNFC interface documentation - Deployment guide for production use
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Coverage report for commit: d22b5f9 Summary - Lines: 100.00% | Methods: 100.00%
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Pull request overview
This pull request adds comprehensive documentation for the PHP SDM library, which implements NTAG 424 DNA Secure Dynamic Messaging (SDM) decryption and validation. The documentation includes installation guides, API references, usage examples, and a complete example Laravel application guide. The PR corrects the product name from "NTAG DNA 424" to the correct "NTAG 424 DNA" and provides extensive technical documentation covering key derivation, encryption modes (AES and LRP), and security considerations.
Key Changes
- Added comprehensive README with quick start guide, badges, and feature highlights
- Created detailed DOCUMENTATION.md with usage patterns, examples, and security best practices
- Added API.md with complete API reference for all classes, methods, and data structures
- Created EXAMPLE_APP.md documenting the Laravel 12.x example application including deployment guide
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.
| File | Description |
|---|---|
| README.md | Updated title to correct product name, added badges, quick start guide, and structured documentation links. Provides high-level overview with PHP 8.3 requirement. |
| DOCUMENTATION.md | New comprehensive guide covering core concepts, key derivation (NIST SP 800-108), encryption modes, parameter modes, error handling, security considerations, and four detailed examples. |
| EXAMPLE_APP.md | New 724-line guide for the Laravel example app covering installation, configuration, routes, WebNFC interface, tamper detection, deployment steps, and Nginx configuration example. |
| API.md | New complete API reference documenting SDM class, KeyDerivation class, enums (EncMode, ParamMode), exceptions, cipher classes, and data format specifications with code examples. |
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| $kdf = new KeyDerivation(); | ||
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| // Derive encryption and MAC keys | ||
| $encKey = $kdf->deriveUndiversifiedKey($masterKey, 1); |
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The variable $uid is used on line 35 but is not defined in the Quick Start example. Users following this example would encounter an undefined variable error. Consider either defining $uid before line 35 (e.g., $uid = hex2bin('04E12AB3CD5E80');) or adding a comment indicating it should be obtained from the decrypted PICC data first.
| $encKey = $kdf->deriveUndiversifiedKey($masterKey, 1); | |
| $encKey = $kdf->deriveUndiversifiedKey($masterKey, 1); | |
| $uid = hex2bin('04E12AB3CD5E80'); // Example UID, replace with actual value from decrypted PICC data |
| $result = $sdm->decrypt( | ||
| encData: hex2bin($piccData), | ||
| encFileData: hex2bin($encFileData), | ||
| cmac: hex2bin($cmac) | ||
| ); |
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The variables $piccData, $encFileData, and $cmac are used but not defined in the Quick Start example. Users would need to know where these come from. Consider adding a comment like // From URL parameters: $piccData, $encFileData, $cmac or brief variable definitions to make the example complete and runnable.
| $isValid = $sdm->validate( | ||
| data: hex2bin($uid . $readCtr), | ||
| cmac: hex2bin($cmac) | ||
| ); |
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The variables $uid and $readCtr are used but not defined in the validate example. Consider adding variable definitions or a comment indicating these come from URL parameters to make the example complete.
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| **Returns:** CMAC value (binary, 16 bytes) | ||
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| **Note:** The `$key` parameter is ignored when using OpenSSL implementation. The key from constructor or first call is used. |
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[nitpick] The note states "The $key parameter is ignored when using OpenSSL implementation. The key from constructor or first call is used." This is potentially confusing API design as it suggests the method signature includes a parameter that may be ignored. Consider documenting which implementation is used by default, or clarifying when OpenSSL vs. other implementations are used, to help users understand when this parameter matters.
| **Note:** The `$key` parameter is ignored when using OpenSSL implementation. The key from constructor or first call is used. | |
| **Note:** By default, the OpenSSL implementation is used if available. In this case, the `$key` parameter is ignored and the key provided to the constructor (or the first call) is used for CMAC calculation. If OpenSSL is not available, a pure PHP implementation is used and the `$key` parameter must be provided. To ensure consistent behavior, check the library's configuration or documentation for details on selecting the implementation. |
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| **Returns:** CMAC value (binary, 16 bytes) | ||
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| **Note:** The `$key` parameter is ignored. The key from constructor is used. |
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[nitpick] Similar to the AESCipher note, the $key parameter is documented as ignored. Consider adding clarity about why this parameter exists in the interface if it's always ignored, or document that this is an implementation detail of the CipherInterface contract.
| **Note:** The `$key` parameter is ignored. The key from constructor is used. | |
| **Note:** The `$key` parameter is present due to the `CipherInterface` contract, but is ignored in this implementation. The key provided to the constructor is always used. |
After merging main branch, update documentation to reflect: - Refactored controller architecture with invokable controllers - New BaseSDMController with shared functionality - Split controllers: TagController, TagPlainTextController, TagTamperController - New Responsable classes: ValidResponse and ErrorResponse - ForceJsonResponseMiddleware for API routes - Separated route files (web.php and api.php) - Static routes using Route::view() - Updated directory structure and component descriptions - Enhanced architecture section with design principles - Improved request flow diagram
- Move EXAMPLE_APP.md content to example-app/README.md - Update all documentation links to point to example-app/README.md - Remove EXAMPLE_APP.md from root directory - Keep documentation closer to the code it describes This makes the documentation structure more logical: - Root README.md - Main library documentation - example-app/README.md - Example app documentation - DOCUMENTATION.md - Detailed usage guide - API.md - API reference
Documentation includes: