hotfix: Added aliases, implemented new runners

src/Hotfix/Signature.php

@@ -0,0 +1,98 @@
+<?php
+
+namespace NoccyLabs\Hotfix\Hotfix;
+
+use Symfony\Component\Yaml\Yaml;
+
+class Signature
+{
+    /** @var bool Whether the signature is valid  */
+    protected $valid;
+
+    /** @var string|null The name of the key used to sign */
+    protected $signer;
+
+    /** @var string|null The ID of the key used to sign */
+    protected $keyId;
+
+    protected $error;
+
+    protected $body;
+
+    protected $signature;
+
+    /**
+     * Constructor
+     *
+     * @param bool $valid Whether the signature is valid
+     * @param string $signer For a valid signature, the name of the signer
+     * @param string $keyId For a valid signature, the key ID
+     */
+    public function __construct($body, $signature)
+    {
+        $this->body = $body;
+        $this->signature = $signature;
+        $this->verify();
+    }
+
+    public function verify()
+    {
+        if (!$this->signature) {
+            $this->error = "Hotfix is not signed!";
+            return;
+        }
+
+        $gpg = gnupg_init();
+
+        $sigInfo = gnupg_verify($gpg, $this->body, $this->signature);
+
+        if ($sigInfo === false) {
+            $this->error = "Invalid signature";
+            return;
+        }
+
+        $fingerprint = $sigInfo[0]['fingerprint'];
+        $keyInfo = gnupg_keyinfo($gpg, $fingerprint);
+
+        if (empty($keyInfo)) {
+            $this->error = "Unknown signer (key id {$sigInfo[0]['fingerprint']})";
+            return;
+        }
+
+        $subKeys = $keyInfo[0]['subkeys'];
+        $keyId = null;
+        foreach ($subKeys as $subKey) {
+            if ($subKey['fingerprint'] == $fingerprint) {
+                $keyId = $subKey['keyid'];
+                break;
+            }
+        }
+
+        $signerInfo = sprintf("%s (%s)", $keyInfo[0]['uids'][0]['name'], $keyInfo[0]['uids'][0]['email']);
+
+        $this->valid = true;
+        $this->signer = $signerInfo;
+        $this->keyId = $keyId;
+    }
+
+    public function isValid()
+    {
+        return ($this->valid === true);
+    }
+
+    public function getSigner()
+    {
+        return $this->signer;
+    }
+
+    public function getKeyId()
+    {
+        return $this->keyId;
+    }
+
+    public function getError()
+    {
+        return $this->error;
+    }
+
+}