1 files changed, 138 insertions, 0 deletions
diff --git a/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/Formats/Keys/PuTTY.php b/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/Formats/Keys/PuTTY.php
new file mode 100644
index 0000000..866c883
--- /dev/null
+++ b/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/Formats/Keys/PuTTY.php
@@ -0,0 +1,138 @@
+<?php
+
+/**
+ * PuTTY Formatted EC Key Handler
+ *
+ * PHP version 5
+ *
+ * @author    Jim Wigginton <[email protected]>
+ * @copyright 2015 Jim Wigginton
+ * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @link      http://phpseclib.sourceforge.net
+ */
+
+namespace phpseclib3\Crypt\EC\Formats\Keys;
+
+use phpseclib3\Common\Functions\Strings;
+use phpseclib3\Crypt\Common\Formats\Keys\PuTTY as Progenitor;
+use phpseclib3\Crypt\EC\BaseCurves\Base as BaseCurve;
+use phpseclib3\Crypt\EC\BaseCurves\TwistedEdwards as TwistedEdwardsCurve;
+use phpseclib3\Math\BigInteger;
+
+/**
+ * PuTTY Formatted EC Key Handler
+ *
+ * @author  Jim Wigginton <[email protected]>
+ */
+abstract class PuTTY extends Progenitor
+{
+    use Common;
+
+    /**
+     * Public Handler
+     *
+     * @var string
+     */
+    const PUBLIC_HANDLER = 'phpseclib3\Crypt\EC\Formats\Keys\OpenSSH';
+
+    /**
+     * Supported Key Types
+     *
+     * @var array
+     */
+    protected static $types = [
+        'ecdsa-sha2-nistp256',
+        'ecdsa-sha2-nistp384',
+        'ecdsa-sha2-nistp521',
+        'ssh-ed25519'
+    ];
+
+    /**
+     * Break a public or private key down into its constituent components
+     *
+     * @param string $key
+     * @param string $password optional
+     * @return array
+     */
+    public static function load($key, $password = '')
+    {
+        $components = parent::load($key, $password);
+        if (!isset($components['private'])) {
+            return $components;
+        }
+
+        $private = $components['private'];
+
+        $temp = Strings::base64_encode(Strings::packSSH2('s', $components['type']) . $components['public']);
+        $components = OpenSSH::load($components['type'] . ' ' . $temp . ' ' . $components['comment']);
+
+        if ($components['curve'] instanceof TwistedEdwardsCurve) {
+            if (Strings::shift($private, 4) != "\0\0\0\x20") {
+                throw new \RuntimeException('Length of ssh-ed25519 key should be 32');
+            }
+            $arr = $components['curve']->extractSecret($private);
+            $components['dA'] = $arr['dA'];
+            $components['secret'] = $arr['secret'];
+        } else {
+            list($components['dA']) = Strings::unpackSSH2('i', $private);
+            $components['curve']->rangeCheck($components['dA']);
+        }
+
+        return $components;
+    }
+
+    /**
+     * Convert a private key to the appropriate format.
+     *
+     * @param \phpseclib3\Math\BigInteger $privateKey
+     * @param \phpseclib3\Crypt\EC\BaseCurves\Base $curve
+     * @param \phpseclib3\Math\Common\FiniteField\Integer[] $publicKey
+     * @param string $secret optional
+     * @param string $password optional
+     * @param array $options optional
+     * @return string
+     */
+    public static function savePrivateKey(BigInteger $privateKey, BaseCurve $curve, array $publicKey, $secret = null, $password = false, array $options = [])
+    {
+        self::initialize_static_variables();
+
+        $public = explode(' ', OpenSSH::savePublicKey($curve, $publicKey));
+        $name = $public[0];
+        $public = Strings::base64_decode($public[1]);
+        list(, $length) = unpack('N', Strings::shift($public, 4));
+        Strings::shift($public, $length);
+
+        // PuTTY pads private keys with a null byte per the following:
+        // https://github.com/github/putty/blob/a3d14d77f566a41fc61dfdc5c2e0e384c9e6ae8b/sshecc.c#L1926
+        if (!$curve instanceof TwistedEdwardsCurve) {
+            $private = $privateKey->toBytes();
+            if (!(strlen($privateKey->toBits()) & 7)) {
+                $private = "\0$private";
+            }
+        }
+
+        $private = $curve instanceof TwistedEdwardsCurve ?
+            Strings::packSSH2('s', $secret) :
+            Strings::packSSH2('s', $private);
+
+        return self::wrapPrivateKey($public, $private, $name, $password, $options);
+    }
+
+    /**
+     * Convert an EC public key to the appropriate format
+     *
+     * @param \phpseclib3\Crypt\EC\BaseCurves\Base $curve
+     * @param \phpseclib3\Math\Common\FiniteField[] $publicKey
+     * @return string
+     */
+    public static function savePublicKey(BaseCurve $curve, array $publicKey)
+    {
+        $public = explode(' ', OpenSSH::savePublicKey($curve, $publicKey));
+        $type = $public[0];
+        $public = Strings::base64_decode($public[1]);
+        list(, $length) = unpack('N', Strings::shift($public, 4));
+        Strings::shift($public, $length);
+
+        return self::wrapPublicKey($public, $type);
+    }
+}