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+composer/ca-bundle
+==================
+
+Small utility library that lets you find a path to the system CA bundle,
+and includes a fallback to the Mozilla CA bundle.
+
+Originally written as part of [composer/composer](https://github.com/composer/composer),
+now extracted and made available as a stand-alone library.
+
+
+Installation
+------------
+
+Install the latest version with:
+
+```bash
+$ composer require composer/ca-bundle
+```
+
+
+Requirements
+------------
+
+* PHP 5.3.2 is required but using the latest version of PHP is highly recommended.
+
+
+Basic usage
+-----------
+
+### `Composer\CaBundle\CaBundle`
+
+- `CaBundle::getSystemCaRootBundlePath()`: Returns the system CA bundle path, or a path to the bundled one as fallback
+- `CaBundle::getBundledCaBundlePath()`: Returns the path to the bundled CA file
+- `CaBundle::validateCaFile($filename)`: Validates a CA file using openssl_x509_parse only if it is safe to use
+- `CaBundle::isOpensslParseSafe()`: Test if it is safe to use the PHP function openssl_x509_parse()
+- `CaBundle::reset()`: Resets the static caches
+
+
+#### To use with curl
+
+```php
+$curl = curl_init("https://example.org/");
+
+$caPathOrFile = \Composer\CaBundle\CaBundle::getSystemCaRootBundlePath();
+if (is_dir($caPathOrFile)) {
+    curl_setopt($curl, CURLOPT_CAPATH, $caPathOrFile);
+} else {
+    curl_setopt($curl, CURLOPT_CAINFO, $caPathOrFile);
+}
+
+$result = curl_exec($curl);
+```
+
+#### To use with php streams
+
+```php
+$opts = array(
+    'http' => array(
+        'method' => "GET"
+    )
+);
+
+$caPathOrFile = \Composer\CaBundle\CaBundle::getSystemCaRootBundlePath();
+if (is_dir($caPathOrFile)) {
+    $opts['ssl']['capath'] = $caPathOrFile;
+} else {
+    $opts['ssl']['cafile'] = $caPathOrFile;
+}
+
+$context = stream_context_create($opts);
+$result = file_get_contents('https://example.com', false, $context);
+```
+
+#### To use with Guzzle
+
+```php
+$client = new \GuzzleHttp\Client([
+    \GuzzleHttp\RequestOptions::VERIFY => \Composer\CaBundle\CaBundle::getSystemCaRootBundlePath()
+]);
+```
+
+License
+-------
+
+composer/ca-bundle is licensed under the MIT License, see the LICENSE file for details.