Added: encryptor tests

Author: capcom6

src/Encryptor.php

@@ -46,7 +46,12 @@ public function Decrypt(string $data): string {
         $salt = base64_decode($saltBase64);
         $secretKey = $this->generateSecretKeyFromPassphrase($this->passphrase, $salt, 32, intval($params['i']));
 
-        return openssl_decrypt($encryptedBase64, 'aes-256-cbc', $secretKey, 0, $salt);
+        $decrypted = openssl_decrypt($encryptedBase64, 'aes-256-cbc', $secretKey, 0, $salt);
+        if ($decrypted === false) {
+            throw new \RuntimeException('Decryption failed, invalid passphrase?');
+        }
+
+        return $decrypted;
     }
 
     protected function generateSalt(int $size = 16): string {

tests/EncryptorTest.php

@@ -0,0 +1,56 @@
+<?php
+
+use AndroidSmsGateway\Encryptor;
+use PHPUnit\Framework\TestCase;
+
+class EncryptorTest extends TestCase {
+    public function testEncryptDecrypt(): void {
+        $passphrase = 'MySecretPassphrase';
+        $encryptor = new Encryptor($passphrase);
+
+        $originalData = 'Sensitive data here';
+        $encryptedData = $encryptor->Encrypt($originalData);
+        $decryptedData = $encryptor->Decrypt($encryptedData);
+
+        $this->assertEquals($originalData, $decryptedData, 'Decrypted data should match original data.');
+    }
+
+    public function testDecryptWithWrongPassphrase(): void {
+        $this->expectException(\RuntimeException::class);
+
+        $passphrase = 'MySecretPassphrase';
+        $wrongPassphrase = 'WrongPassphrase';
+        $encryptor = new Encryptor($passphrase);
+        $wrongEncryptor = new Encryptor($wrongPassphrase);
+
+        $originalData = 'Sensitive data here';
+        $encryptedData = $encryptor->Encrypt($originalData);
+
+        // Try to decrypt with wrong passphrase
+        $wrongEncryptor->Decrypt($encryptedData);
+    }
+
+    public function testDecryptWithUnsupportedAlgorithm(): void {
+        $this->expectException(\RuntimeException::class);
+
+        $passphrase = 'MySecretPassphrase';
+        $encryptor = new Encryptor($passphrase);
+
+        // Manually construct data with unsupported algorithm
+        $unsupportedData = '$unsupported-algo$i=10000$fakeSalt$fakeEncryptedData';
+
+        $encryptor->Decrypt($unsupportedData);
+    }
+
+    public function testDecryptWithMissingIterationCount(): void {
+        $this->expectException(\RuntimeException::class);
+
+        $passphrase = 'MySecretPassphrase';
+        $encryptor = new Encryptor($passphrase);
+
+        // Manually construct data with missing iteration count
+        $missingIterationCountData = '$aes-256-cbc/pbkdf2-sha1$x=1$fakeSalt$fakeEncryptedData';
+
+        $encryptor->Decrypt($missingIterationCountData);
+    }
+}