1 files changed, 321 insertions, 321 deletions
diff --git a/vendor/minishlink/web-push/src/Encryption.php b/vendor/minishlink/web-push/src/Encryption.php
index e9fe1ac..c867265 100644
--- a/vendor/minishlink/web-push/src/Encryption.php
+++ b/vendor/minishlink/web-push/src/Encryption.php
@@ -1,321 +1,321 @@
-<?php
-
-declare(strict_types=1);
-
-/*
- * This file is part of the WebPush library.
- *
- * (c) Louis Lagrange <lagrange.louis@gmail.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Minishlink\WebPush;
-
-use Base64Url\Base64Url;
-use Jose\Component\Core\Util\Ecc\NistCurve;
-use Jose\Component\Core\Util\Ecc\Point;
-use Jose\Component\Core\Util\Ecc\PrivateKey;
-use Jose\Component\Core\Util\Ecc\PublicKey;
-
-class Encryption
-{
-    public const MAX_PAYLOAD_LENGTH = 4078;
-    public const MAX_COMPATIBILITY_PAYLOAD_LENGTH = 3052;
-
-    /**
-     * @param string $payload
-     * @param int $maxLengthToPad
-     * @param string $contentEncoding
-     * @return string padded payload (plaintext)
-     * @throws \ErrorException
-     */
-    public static function padPayload(string $payload, int $maxLengthToPad, string $contentEncoding): string
-    {
-        $payloadLen = Utils::safeStrlen($payload);
-        $padLen = $maxLengthToPad ? $maxLengthToPad - $payloadLen : 0;
-
-        if ($contentEncoding === "aesgcm") {
-            return pack('n*', $padLen).str_pad($payload, $padLen + $payloadLen, chr(0), STR_PAD_LEFT);
-        } elseif ($contentEncoding === "aes128gcm") {
-            return str_pad($payload.chr(2), $padLen + $payloadLen, chr(0), STR_PAD_RIGHT);
-        } else {
-            throw new \ErrorException("This content encoding is not supported");
-        }
-    }
-
-    /**
-     * @param string $payload With padding
-     * @param string $userPublicKey Base 64 encoded (MIME or URL-safe)
-     * @param string $userAuthToken Base 64 encoded (MIME or URL-safe)
-     * @param string $contentEncoding
-     * @return array
-     *
-     * @throws \ErrorException
-     */
-    public static function encrypt(string $payload, string $userPublicKey, string $userAuthToken, string $contentEncoding): array
-    {
-        return self::deterministicEncrypt(
-            $payload,
-            $userPublicKey,
-            $userAuthToken,
-            $contentEncoding,
-            self::createLocalKeyObject(),
-            random_bytes(16)
-        );
-    }
-
-    /**
-     * @param string $payload
-     * @param string $userPublicKey
-     * @param string $userAuthToken
-     * @param string $contentEncoding
-     * @param array $localKeyObject
-     * @param string $salt
-     * @return array
-     *
-     * @throws \ErrorException
-     */
-    public static function deterministicEncrypt(string $payload, string $userPublicKey, string $userAuthToken, string $contentEncoding, array $localKeyObject, string $salt): array
-    {
-        $userPublicKey = Base64Url::decode($userPublicKey);
-        $userAuthToken = Base64Url::decode($userAuthToken);
-
-        $curve = NistCurve::curve256();
-
-        // get local key pair
-        list($localPublicKeyObject, $localPrivateKeyObject) = $localKeyObject;
-        $localPublicKey = hex2bin(Utils::serializePublicKey($localPublicKeyObject));
-        if (!$localPublicKey) {
-            throw new \ErrorException('Failed to convert local public key from hexadecimal to binary');
-        }
-
-        // get user public key object
-        [$userPublicKeyObjectX, $userPublicKeyObjectY] = Utils::unserializePublicKey($userPublicKey);
-        $userPublicKeyObject = $curve->getPublicKeyFrom(
-            gmp_init(bin2hex($userPublicKeyObjectX), 16),
-            gmp_init(bin2hex($userPublicKeyObjectY), 16)
-        );
-
-        // get shared secret from user public key and local private key
-        $sharedSecret = $curve->mul($userPublicKeyObject->getPoint(), $localPrivateKeyObject->getSecret())->getX();
-        $sharedSecret = hex2bin(str_pad(gmp_strval($sharedSecret, 16), 64, '0', STR_PAD_LEFT));
-        if (!$sharedSecret) {
-            throw new \ErrorException('Failed to convert shared secret from hexadecimal to binary');
-        }
-
-        // section 4.3
-        $ikm = self::getIKM($userAuthToken, $userPublicKey, $localPublicKey, $sharedSecret, $contentEncoding);
-
-        // section 4.2
-        $context = self::createContext($userPublicKey, $localPublicKey, $contentEncoding);
-
-        // derive the Content Encryption Key
-        $contentEncryptionKeyInfo = self::createInfo($contentEncoding, $context, $contentEncoding);
-        $contentEncryptionKey = self::hkdf($salt, $ikm, $contentEncryptionKeyInfo, 16);
-
-        // section 3.3, derive the nonce
-        $nonceInfo = self::createInfo('nonce', $context, $contentEncoding);
-        $nonce = self::hkdf($salt, $ikm, $nonceInfo, 12);
-
-        // encrypt
-        // "The additional data passed to each invocation of AEAD_AES_128_GCM is a zero-length octet sequence."
-        $tag = '';
-        $encryptedText = openssl_encrypt($payload, 'aes-128-gcm', $contentEncryptionKey, OPENSSL_RAW_DATA, $nonce, $tag);
-
-        // return values in url safe base64
-        return [
-            'localPublicKey' => $localPublicKey,
-            'salt' => $salt,
-            'cipherText' => $encryptedText.$tag,
-        ];
-    }
-
-    public static function getContentCodingHeader($salt, $localPublicKey, $contentEncoding): string
-    {
-        if ($contentEncoding === "aes128gcm") {
-            return $salt
-                .pack('N*', 4096)
-                .pack('C*', Utils::safeStrlen($localPublicKey))
-                .$localPublicKey;
-        }
-
-        return "";
-    }
-
-    /**
-     * HMAC-based Extract-and-Expand Key Derivation Function (HKDF).
-     *
-     * This is used to derive a secure encryption key from a mostly-secure shared
-     * secret.
-     *
-     * This is a partial implementation of HKDF tailored to our specific purposes.
-     * In particular, for us the value of N will always be 1, and thus T always
-     * equals HMAC-Hash(PRK, info | 0x01).
-     *
-     * See {@link https://www.rfc-editor.org/rfc/rfc5869.txt}
-     * From {@link https://github.com/GoogleChrome/push-encryption-node/blob/master/src/encrypt.js}
-     *
-     * @param string $salt   A non-secret random value
-     * @param string $ikm    Input keying material
-     * @param string $info   Application-specific context
-     * @param int    $length The length (in bytes) of the required output key
-     *
-     * @return string
-     */
-    private static function hkdf(string $salt, string $ikm, string $info, int $length): string
-    {
-        // extract
-        $prk = hash_hmac('sha256', $ikm, $salt, true);
-
-        // expand
-        return mb_substr(hash_hmac('sha256', $info.chr(1), $prk, true), 0, $length, '8bit');
-    }
-
-    /**
-     * Creates a context for deriving encryption parameters.
-     * See section 4.2 of
-     * {@link https://tools.ietf.org/html/draft-ietf-httpbis-encryption-encoding-00}
-     * From {@link https://github.com/GoogleChrome/push-encryption-node/blob/master/src/encrypt.js}.
-     *
-     * @param string $clientPublicKey The client's public key
-     * @param string $serverPublicKey Our public key
-     *
-     * @return null|string
-     *
-     * @throws \ErrorException
-     */
-    private static function createContext(string $clientPublicKey, string $serverPublicKey, $contentEncoding): ?string
-    {
-        if ($contentEncoding === "aes128gcm") {
-            return null;
-        }
-
-        if (Utils::safeStrlen($clientPublicKey) !== 65) {
-            throw new \ErrorException('Invalid client public key length');
-        }
-
-        // This one should never happen, because it's our code that generates the key
-        if (Utils::safeStrlen($serverPublicKey) !== 65) {
-            throw new \ErrorException('Invalid server public key length');
-        }
-
-        $len = chr(0).'A'; // 65 as Uint16BE
-
-        return chr(0).$len.$clientPublicKey.$len.$serverPublicKey;
-    }
-
-    /**
-     * Returns an info record. See sections 3.2 and 3.3 of
-     * {@link https://tools.ietf.org/html/draft-ietf-httpbis-encryption-encoding-00}
-     * From {@link https://github.com/GoogleChrome/push-encryption-node/blob/master/src/encrypt.js}.
-     *
-     * @param string $type The type of the info record
-     * @param string|null $context The context for the record
-     * @param string $contentEncoding
-     * @return string
-     *
-     * @throws \ErrorException
-     */
-    private static function createInfo(string $type, ?string $context, string $contentEncoding): string
-    {
-        if ($contentEncoding === "aesgcm") {
-            if (!$context) {
-                throw new \ErrorException('Context must exist');
-            }
-
-            if (Utils::safeStrlen($context) !== 135) {
-                throw new \ErrorException('Context argument has invalid size');
-            }
-
-            return 'Content-Encoding: '.$type.chr(0).'P-256'.$context;
-        } elseif ($contentEncoding === "aes128gcm") {
-            return 'Content-Encoding: '.$type.chr(0);
-        }
-
-        throw new \ErrorException('This content encoding is not supported.');
-    }
-
-    /**
-     * @return array
-     */
-    private static function createLocalKeyObject(): array
-    {
-        try {
-            return self::createLocalKeyObjectUsingOpenSSL();
-        } catch (\Exception $e) {
-            return self::createLocalKeyObjectUsingPurePhpMethod();
-        }
-    }
-
-    /**
-     * @return array
-     */
-    private static function createLocalKeyObjectUsingPurePhpMethod(): array
-    {
-        $curve = NistCurve::curve256();
-        $privateKey = $curve->createPrivateKey();
-
-        return [
-            $curve->createPublicKey($privateKey),
-            $privateKey,
-        ];
-    }
-
-    /**
-     * @return array
-     */
-    private static function createLocalKeyObjectUsingOpenSSL(): array
-    {
-        $keyResource = openssl_pkey_new([
-            'curve_name'       => 'prime256v1',
-            'private_key_type' => OPENSSL_KEYTYPE_EC,
-        ]);
-
-        if (!$keyResource) {
-            throw new \RuntimeException('Unable to create the key');
-        }
-
-        $details = openssl_pkey_get_details($keyResource);
-        openssl_pkey_free($keyResource);
-
-        if (!$details) {
-            throw new \RuntimeException('Unable to get the key details');
-        }
-
-        return [
-            PublicKey::create(Point::create(
-                gmp_init(bin2hex($details['ec']['x']), 16),
-                gmp_init(bin2hex($details['ec']['y']), 16)
-            )),
-            PrivateKey::create(gmp_init(bin2hex($details['ec']['d']), 16))
-        ];
-    }
-
-    /**
-     * @param string $userAuthToken
-     * @param string $userPublicKey
-     * @param string $localPublicKey
-     * @param string $sharedSecret
-     * @param string $contentEncoding
-     * @return string
-     * @throws \ErrorException
-     */
-    private static function getIKM(string $userAuthToken, string $userPublicKey, string $localPublicKey, string $sharedSecret, string $contentEncoding): string
-    {
-        if (!empty($userAuthToken)) {
-            if ($contentEncoding === "aesgcm") {
-                $info = 'Content-Encoding: auth'.chr(0);
-            } elseif ($contentEncoding === "aes128gcm") {
-                $info = "WebPush: info".chr(0).$userPublicKey.$localPublicKey;
-            } else {
-                throw new \ErrorException("This content encoding is not supported");
-            }
-
-            return self::hkdf($userAuthToken, $sharedSecret, $info, 32);
-        }
-
-        return $sharedSecret;
-    }
-}
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the WebPush library.
+ *
+ * (c) Louis Lagrange <lagrange.louis@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Minishlink\WebPush;
+
+use Base64Url\Base64Url;
+use Jose\Component\Core\Util\Ecc\NistCurve;
+use Jose\Component\Core\Util\Ecc\Point;
+use Jose\Component\Core\Util\Ecc\PrivateKey;
+use Jose\Component\Core\Util\Ecc\PublicKey;
+
+class Encryption
+{
+    public const MAX_PAYLOAD_LENGTH = 4078;
+    public const MAX_COMPATIBILITY_PAYLOAD_LENGTH = 3052;
+
+    /**
+     * @param string $payload
+     * @param int $maxLengthToPad
+     * @param string $contentEncoding
+     * @return string padded payload (plaintext)
+     * @throws \ErrorException
+     */
+    public static function padPayload(string $payload, int $maxLengthToPad, string $contentEncoding): string
+    {
+        $payloadLen = Utils::safeStrlen($payload);
+        $padLen = $maxLengthToPad ? $maxLengthToPad - $payloadLen : 0;
+
+        if ($contentEncoding === "aesgcm") {
+            return pack('n*', $padLen).str_pad($payload, $padLen + $payloadLen, chr(0), STR_PAD_LEFT);
+        } elseif ($contentEncoding === "aes128gcm") {
+            return str_pad($payload.chr(2), $padLen + $payloadLen, chr(0), STR_PAD_RIGHT);
+        } else {
+            throw new \ErrorException("This content encoding is not supported");
+        }
+    }
+
+    /**
+     * @param string $payload With padding
+     * @param string $userPublicKey Base 64 encoded (MIME or URL-safe)
+     * @param string $userAuthToken Base 64 encoded (MIME or URL-safe)
+     * @param string $contentEncoding
+     * @return array
+     *
+     * @throws \ErrorException
+     */
+    public static function encrypt(string $payload, string $userPublicKey, string $userAuthToken, string $contentEncoding): array
+    {
+        return self::deterministicEncrypt(
+            $payload,
+            $userPublicKey,
+            $userAuthToken,
+            $contentEncoding,
+            self::createLocalKeyObject(),
+            random_bytes(16)
+        );
+    }
+
+    /**
+     * @param string $payload
+     * @param string $userPublicKey
+     * @param string $userAuthToken
+     * @param string $contentEncoding
+     * @param array $localKeyObject
+     * @param string $salt
+     * @return array
+     *
+     * @throws \ErrorException
+     */
+    public static function deterministicEncrypt(string $payload, string $userPublicKey, string $userAuthToken, string $contentEncoding, array $localKeyObject, string $salt): array
+    {
+        $userPublicKey = Base64Url::decode($userPublicKey);
+        $userAuthToken = Base64Url::decode($userAuthToken);
+
+        $curve = NistCurve::curve256();
+
+        // get local key pair
+        list($localPublicKeyObject, $localPrivateKeyObject) = $localKeyObject;
+        $localPublicKey = hex2bin(Utils::serializePublicKey($localPublicKeyObject));
+        if (!$localPublicKey) {
+            throw new \ErrorException('Failed to convert local public key from hexadecimal to binary');
+        }
+
+        // get user public key object
+        [$userPublicKeyObjectX, $userPublicKeyObjectY] = Utils::unserializePublicKey($userPublicKey);
+        $userPublicKeyObject = $curve->getPublicKeyFrom(
+            gmp_init(bin2hex($userPublicKeyObjectX), 16),
+            gmp_init(bin2hex($userPublicKeyObjectY), 16)
+        );
+
+        // get shared secret from user public key and local private key
+        $sharedSecret = $curve->mul($userPublicKeyObject->getPoint(), $localPrivateKeyObject->getSecret())->getX();
+        $sharedSecret = hex2bin(str_pad(gmp_strval($sharedSecret, 16), 64, '0', STR_PAD_LEFT));
+        if (!$sharedSecret) {
+            throw new \ErrorException('Failed to convert shared secret from hexadecimal to binary');
+        }
+
+        // section 4.3
+        $ikm = self::getIKM($userAuthToken, $userPublicKey, $localPublicKey, $sharedSecret, $contentEncoding);
+
+        // section 4.2
+        $context = self::createContext($userPublicKey, $localPublicKey, $contentEncoding);
+
+        // derive the Content Encryption Key
+        $contentEncryptionKeyInfo = self::createInfo($contentEncoding, $context, $contentEncoding);
+        $contentEncryptionKey = self::hkdf($salt, $ikm, $contentEncryptionKeyInfo, 16);
+
+        // section 3.3, derive the nonce
+        $nonceInfo = self::createInfo('nonce', $context, $contentEncoding);
+        $nonce = self::hkdf($salt, $ikm, $nonceInfo, 12);
+
+        // encrypt
+        // "The additional data passed to each invocation of AEAD_AES_128_GCM is a zero-length octet sequence."
+        $tag = '';
+        $encryptedText = openssl_encrypt($payload, 'aes-128-gcm', $contentEncryptionKey, OPENSSL_RAW_DATA, $nonce, $tag);
+
+        // return values in url safe base64
+        return [
+            'localPublicKey' => $localPublicKey,
+            'salt' => $salt,
+            'cipherText' => $encryptedText.$tag,
+        ];
+    }
+
+    public static function getContentCodingHeader($salt, $localPublicKey, $contentEncoding): string
+    {
+        if ($contentEncoding === "aes128gcm") {
+            return $salt
+                .pack('N*', 4096)
+                .pack('C*', Utils::safeStrlen($localPublicKey))
+                .$localPublicKey;
+        }
+
+        return "";
+    }
+
+    /**
+     * HMAC-based Extract-and-Expand Key Derivation Function (HKDF).
+     *
+     * This is used to derive a secure encryption key from a mostly-secure shared
+     * secret.
+     *
+     * This is a partial implementation of HKDF tailored to our specific purposes.
+     * In particular, for us the value of N will always be 1, and thus T always
+     * equals HMAC-Hash(PRK, info | 0x01).
+     *
+     * See {@link https://www.rfc-editor.org/rfc/rfc5869.txt}
+     * From {@link https://github.com/GoogleChrome/push-encryption-node/blob/master/src/encrypt.js}
+     *
+     * @param string $salt   A non-secret random value
+     * @param string $ikm    Input keying material
+     * @param string $info   Application-specific context
+     * @param int    $length The length (in bytes) of the required output key
+     *
+     * @return string
+     */
+    private static function hkdf(string $salt, string $ikm, string $info, int $length): string
+    {
+        // extract
+        $prk = hash_hmac('sha256', $ikm, $salt, true);
+
+        // expand
+        return mb_substr(hash_hmac('sha256', $info.chr(1), $prk, true), 0, $length, '8bit');
+    }
+
+    /**
+     * Creates a context for deriving encryption parameters.
+     * See section 4.2 of
+     * {@link https://tools.ietf.org/html/draft-ietf-httpbis-encryption-encoding-00}
+     * From {@link https://github.com/GoogleChrome/push-encryption-node/blob/master/src/encrypt.js}.
+     *
+     * @param string $clientPublicKey The client's public key
+     * @param string $serverPublicKey Our public key
+     *
+     * @return null|string
+     *
+     * @throws \ErrorException
+     */
+    private static function createContext(string $clientPublicKey, string $serverPublicKey, $contentEncoding): ?string
+    {
+        if ($contentEncoding === "aes128gcm") {
+            return null;
+        }
+
+        if (Utils::safeStrlen($clientPublicKey) !== 65) {
+            throw new \ErrorException('Invalid client public key length');
+        }
+
+        // This one should never happen, because it's our code that generates the key
+        if (Utils::safeStrlen($serverPublicKey) !== 65) {
+            throw new \ErrorException('Invalid server public key length');
+        }
+
+        $len = chr(0).'A'; // 65 as Uint16BE
+
+        return chr(0).$len.$clientPublicKey.$len.$serverPublicKey;
+    }
+
+    /**
+     * Returns an info record. See sections 3.2 and 3.3 of
+     * {@link https://tools.ietf.org/html/draft-ietf-httpbis-encryption-encoding-00}
+     * From {@link https://github.com/GoogleChrome/push-encryption-node/blob/master/src/encrypt.js}.
+     *
+     * @param string $type The type of the info record
+     * @param string|null $context The context for the record
+     * @param string $contentEncoding
+     * @return string
+     *
+     * @throws \ErrorException
+     */
+    private static function createInfo(string $type, ?string $context, string $contentEncoding): string
+    {
+        if ($contentEncoding === "aesgcm") {
+            if (!$context) {
+                throw new \ErrorException('Context must exist');
+            }
+
+            if (Utils::safeStrlen($context) !== 135) {
+                throw new \ErrorException('Context argument has invalid size');
+            }
+
+            return 'Content-Encoding: '.$type.chr(0).'P-256'.$context;
+        } elseif ($contentEncoding === "aes128gcm") {
+            return 'Content-Encoding: '.$type.chr(0);
+        }
+
+        throw new \ErrorException('This content encoding is not supported.');
+    }
+
+    /**
+     * @return array
+     */
+    private static function createLocalKeyObject(): array
+    {
+        try {
+            return self::createLocalKeyObjectUsingOpenSSL();
+        } catch (\Exception $e) {
+            return self::createLocalKeyObjectUsingPurePhpMethod();
+        }
+    }
+
+    /**
+     * @return array
+     */
+    private static function createLocalKeyObjectUsingPurePhpMethod(): array
+    {
+        $curve = NistCurve::curve256();
+        $privateKey = $curve->createPrivateKey();
+
+        return [
+            $curve->createPublicKey($privateKey),
+            $privateKey,
+        ];
+    }
+
+    /**
+     * @return array
+     */
+    private static function createLocalKeyObjectUsingOpenSSL(): array
+    {
+        $keyResource = openssl_pkey_new([
+            'curve_name'       => 'prime256v1',
+            'private_key_type' => OPENSSL_KEYTYPE_EC,
+        ]);
+
+        if (!$keyResource) {
+            throw new \RuntimeException('Unable to create the key');
+        }
+
+        $details = openssl_pkey_get_details($keyResource);
+        openssl_pkey_free($keyResource);
+
+        if (!$details) {
+            throw new \RuntimeException('Unable to get the key details');
+        }
+
+        return [
+            PublicKey::create(Point::create(
+                gmp_init(bin2hex($details['ec']['x']), 16),
+                gmp_init(bin2hex($details['ec']['y']), 16)
+            )),
+            PrivateKey::create(gmp_init(bin2hex($details['ec']['d']), 16))
+        ];
+    }
+
+    /**
+     * @param string $userAuthToken
+     * @param string $userPublicKey
+     * @param string $localPublicKey
+     * @param string $sharedSecret
+     * @param string $contentEncoding
+     * @return string
+     * @throws \ErrorException
+     */
+    private static function getIKM(string $userAuthToken, string $userPublicKey, string $localPublicKey, string $sharedSecret, string $contentEncoding): string
+    {
+        if (!empty($userAuthToken)) {
+            if ($contentEncoding === "aesgcm") {
+                $info = 'Content-Encoding: auth'.chr(0);
+            } elseif ($contentEncoding === "aes128gcm") {
+                $info = "WebPush: info".chr(0).$userPublicKey.$localPublicKey;
+            } else {
+                throw new \ErrorException("This content encoding is not supported");
+            }
+
+            return self::hkdf($userAuthToken, $sharedSecret, $info, 32);
+        }
+
+        return $sharedSecret;
+    }
+}