ldc-qrcollector-back/app/Models/Service.php

<?php

namespace App\Models;

use App\Lib\Helpers\ToolboxHelper;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Crypt;
use Illuminate\Support\Str;

class Service extends Model
{
    use HasFactory;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'name',
        'bearer_token',
        'bearer_pwd',
        'brand_id'
    ];

    // * EVENTS

    /**
     * Perform any actions required after the model boots.
     *
     * @return void
     */
    protected static function booted()
    {
        static::creating(function (self $model) {
            self::assertFieldIsUnique('name', $model->name);
            $model->generateBearerToken();
            $model->generateBearerPassword();
        });
    }

    // * METHODS

    /**
     * Asserts using validation that the field is unique.
     *
     * @param string       $nameField
     * @param string       $valueField
     * @param integer|null $id
     * @return void
     */
    private static function assertFieldIsUnique(string $nameField, string $valueField, ?int $id = null)
    {
        $table = (new self())->getTable();
        ToolboxHelper::assertFieldIsUnique($table, $nameField, $valueField, $id);
    }

    /**
     * Generates new bearer token
     *
     * @return string
     */
    public function generateBearerToken(): string
    {
        $this->bearer_token      = hash('ripemd160', Str::uuid());
        $this->bearer_token_date = now();
        return $this->bearer_token;
    }

    /**
     * Generates new bearer password
     * It store the crypted password in model
     * and returns the plain password
     *
     * @return string
     */
    public function generateBearerPassword(): string
    {
        $pwd              = hash('sha256', Str::uuid());
        $this->bearer_pwd = Crypt::encryptString($pwd);
        return $pwd;
    }

    /**
     * Authenticate the request for this service
     *
     * This will check hash-mac and that the request is wellformed
     *
     * The request should have the minimum following parameters
     *  - timestamp using format Y-m-d H:i:s, and must be UTC (Greenwich Mean Time)
     *  - bearerToken the public token generated by the crm
     *  - signature the hashmac signature of the request
     *
     * ! Signature must be calculated with every parameter urlencode once only
     * ! All parameters to calculate the signature must be sorted (natural sort asc)
     *
     * ! Signature should look like
     * * httpVerb\n
     * * uri\n
     * * queryString
     *
     * ! httpVerb as well as uri must be lower case
     * ! uri should include scheme, host and path and nothing else, if path is empty a trailing slash should be added
     * ! eg: https://ldc-crm.fr/customer/1  or  https://ldc-crm.fr/
     * ! The query string shall be separated with '&', eg param1=value1&param2=value2
     * ! Key names and values of the query string must be url encoded using RFC 3986
     * ! http://www.faqs.org/rfcs/rfc3986.html
     * ! Signature must be hmac sha256 using the private key generatedby the crm
     *
     *     * ! They should then be concat in a string separated by \n
     *
     *
     *
     * @param \Illuminate\Http\Request $request
     * @return boolean
     * @throws \RuntimeException If an error occurs.
     */
    public function authenticateApi(Request $request): bool
    {
        // ! Hack to prevent Laravel to cast empty strings to null or the opposite.
        // ! If cannot decode json user legacy all() method.
        $data = \json_decode($request->getContent(), true);
        $data = (\is_array($data) and \json_last_error() === \JSON_ERROR_NONE) ?
            array_replace_recursive($request->all(), $data) : $request->all();

        $uri = $request->getUri();
        if (app()->environment(['staging', 'production']) and Str::of($uri)->startsWith('http')) {
            $uri = (string)Str::of($uri)->replaceFirst('http', 'https');
        }
        $calculatedHash = ToolboxHelper::signRequest(
            $this->bearer_pwd,
            $uri,
            $request->getMethod(),
            $data
        );

        // ! Très important hash_equals https://fr.wikipedia.org/wiki/Attaque_temporelle
        return \hash_equals($calculatedHash, $request->signature);
    }

    // * RELATIONSHIPS

    /**
     * Get the brand that owns the service.
     *
     * @return BelongsTo
     */
    public function brand()
    {
        return $this->belongsTo(Brand::class);
    }
}