通过PHP与七牛云存储接口实现图片加密解密的方法

<?php
// 引入七牛云存储SDK
require_once('qiniu/autoload.php');

use QiniuAuth;
use QiniuStorageUploadManager;

// 七牛云存储配置信息
$accessKey = 'your_access_key';
$secretKey = 'your_secret_key';
$bucket = 'your_bucket';
$auth = new Auth($accessKey, $secretKey);
$token = $auth->uploadToken($bucket);

// 加密密钥
$key = 'your_encryption_key';

// 加密函数
function encryptImage($file, $key) {
    $data = file_get_contents($file);
    $encryptedData = openssl_encrypt($data, 'AES-128-ECB', $key);
    return $encryptedData;
}

// 上传加密图片
function uploadEncryptedImage($file, $key, $bucket, $token) {
    $encryptedData = encryptImage($file, $key);
    $uploadManager = new UploadManager();
    list($ret, $err) = $uploadManager->put($token, null, $encryptedData);
    if ($err !== null) {
        return false;
    }
    return true;
}

// 使用示例
$file = 'path/to/your/image.jpg';
if (uploadEncryptedImage($file, $key, $bucket, $token)) {
    echo '图片加密并上传成功';
} else {
    echo '图片加密并上传失败';
}
?>

<?php
// 引入七牛云存储SDK
require_once('qiniu/autoload.php');

use QiniuAuth;
use QiniuStorageBucketManager;

// 七牛云存储配置信息
$accessKey = 'your_access_key';
$secretKey = 'your_secret_key';

// 解密密钥
$key = 'your_encryption_key';

// 解密函数
function decryptImage($data, $key) {
    $decryptedData = openssl_decrypt($data, 'AES-128-ECB', $key);
    return $decryptedData;
}

// 下载并解密图片
function downloadAndDecryptImage($file, $key) {
    $auth = new Auth($accessKey, $secretKey);
    $bucketManager = new BucketManager($auth);
    list($data, $err) = $bucketManager->fetch($bucket, $file);
    if ($err !== null) {
        return false;
    }
    $decryptedData = decryptImage($data, $key);
    
    // 将解密后的图片数据保存到本地或者输出到浏览器
    // code...
    
    return true;
}

// 使用示例
$file = 'path/to/your/image.jpg';
if (downloadAndDecryptImage($file, $key)) {
    echo '图片下载并解密成功';
} else {
    echo '图片下载并解密失败';
}
?>