81 lines
2.2 KiB
PHP
81 lines
2.2 KiB
PHP
<?php
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namespace App\Http\Middleware;
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use Closure;
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use Illuminate\Http\Request;
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use Illuminate\Routing\Exceptions\InvalidSignatureException;
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use Illuminate\Support\Arr;
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use Illuminate\Support\Carbon;
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class ValidateSignature
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{
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/**
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* Handle an incoming request.
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*
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* @param \Illuminate\Http\Request $request
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* @param \Closure $next
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* @return \Illuminate\Http\Response
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*
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* @throws \Illuminate\Routing\Exceptions\InvalidSignatureException
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*/
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public function handle($request, Closure $next)
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{
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if ($this->hasValidSignature($request)) {
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return $next($request);
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}
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throw new InvalidSignatureException;
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}
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/**
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* Determine if the given request has a valid signature.
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*
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* @param \Illuminate\Http\Request $request
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* @param bool $absolute
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* @return bool
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*/
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public function hasValidSignature(Request $request, $absolute = true)
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{
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return $this->hasCorrectSignature($request, $absolute)
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&& $this->signatureHasNotExpired($request);
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}
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/**
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* Determine if the signature from the given request matches the URL.
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*
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* @param \Illuminate\Http\Request $request
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* @param bool $absolute
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* @return bool
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*/
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public function hasCorrectSignature(Request $request, $absolute = true)
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{
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$url = $absolute ? $request->url() : '/' . $request->path();
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$original = rtrim($url . '?' . Arr::query(
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Arr::only($request->query(), ['company_id'])
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) . Arr::query(
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Arr::only($request->query(), ['expires'])
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), '?');
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$signature = hash_hmac('sha256', $original, call_user_func(function () {
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return config('app.key');
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}));
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return hash_equals($signature, (string) $request->query('signature', ''));
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}
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/**
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* Determine if the expires timestamp from the given request is not from the past.
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*
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* @param \Illuminate\Http\Request $request
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* @return bool
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*/
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public function signatureHasNotExpired(Request $request)
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{
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$expires = $request->query('expires');
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return !($expires && Carbon::now()->getTimestamp() > $expires);
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}
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}
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