更新RSA加密类

src/RSA.php

@@ -4,11 +4,11 @@ namespace encrypt;
 
 interface RSA
 {
-    public function publicKey(): string;
+    public function publicKey();
 
-    public function privateKey(): string;
+    public function privateKey();
 
-    public function encrypt(string $data, bool $public = true): string;
+    public function encrypt(string $data): ?string;
 
-    public function decrypt(string $data, bool $public = true): string;
+    public function decrypt(string $data): ?string;
 }

src/classes/RSA.php

@@ -2,7 +2,98 @@
 
 namespace encrypt\classes;
 
+/**
+ * RSA加密解密类
+ * Class RSA
+ * @package encrypt\classes
+ */
 class RSA implements \encrypt\RSA
 {
-    
+
+    const USE_PUBLIC = 1;
+
+    const USE_PRIVATE = 2;
+
+    private $config = [];
+
+    /**
+     * RSA constructor.
+     * @param array $config
+     *
+     * $config = ['public_key' => 'path', 'private_key' => 'path']
+     *
+     * @throws \Exception
+     */
+    public function __construct(array $config)
+    {
+        $this->config = $config;
+        if (!isset($this->config['public_key'], $this->config['private_key'])) {
+            throw new \Exception('公钥私钥参数错误');
+        }
+    }
+
+    /**
+     * 获取公钥
+     * @return string
+     */
+    public function publicKey()
+    {
+        if (!is_file($this->config['public_key'])) {
+            return '';
+        }
+        $content = file_get_contents($this->config['public_key']);
+        return openssl_pkey_get_public($content);
+    }
+
+    /**
+     * 获取私钥
+     * @return string
+     */
+    public function privateKey()
+    {
+        if (!is_file($this->config['private_key'])) {
+            return '';
+        }
+        $content = file_get_contents($this->config['private_key']);
+        return openssl_pkey_get_private($content);
+    }
+
+    /**
+     * 加密数据
+     * @param string $data
+     * @param int $type
+     * @return null|string
+     */
+    public function encrypt(string $data, $type = RSA::USE_PRIVATE): ?string
+    {
+        if (RSA::USE_PRIVATE === $type) {
+            $func = 'openssl_private_encrypt';
+            $key = $this->privateKey();
+        } else {
+            $func = 'openssl_public_encrypt';
+            $key = $this->publicKey();
+        }
+
+        /** @var string $encrypted */
+        return $func($data, $encrypted, $key) ? base64_encode($encrypted) : null;
+    }
+
+    /**
+     * 解密数据
+     * @param string $data
+     * @param int $type
+     * @return null|string
+     */
+    public function decrypt(string $data, $type = RSA::USE_PRIVATE): ?string
+    {
+        if (RSA::USE_PRIVATE === $type) {
+            $func = 'openssl_private_decrypt';
+            $key = $this->privateKey();
+        } else {
+            $func = 'openssl_public_decrypt';
+            $key = $this->publicKey();
+        }
+
+        return $func(base64_decode($data), $data, $key) ? $data : null;
+    }
 }