530 lines
18 KiB
PHP
Executable File
530 lines
18 KiB
PHP
Executable File
<?php
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declare(strict_types=1);
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namespace app\common\service\wechat;
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use FFI;
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use think\facade\Log;
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/**
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* 仅为 IDE/静态分析"看见" FFI::cdef 绑定的 C 函数，不会在运行时使用；
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* 运行时 $this->ffi 是真正的 FFI 实例，方法是 FFI::cdef 动态注入。
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*
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* @method \FFI\CData NewSdk()
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* @method int Init(\FFI\CData $sdk, string $corpid, string $secret)
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* @method void DestroySdk(\FFI\CData $sdk)
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* @method int GetChatData(\FFI\CData $sdk, int $seq, int $limit, string $proxy, string $passwd, int $timeout, \FFI\CData $out)
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* @method int DecryptData(string $encryptKey, string $encryptMsg, \FFI\CData $out)
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* @method int GetMediaData(\FFI\CData $sdk, string $indexbuf, string $sdkFileid, string $proxy, string $passwd, int $timeout, \FFI\CData $out)
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* @method \FFI\CData NewSlice()
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* @method void FreeSlice(\FFI\CData $slice)
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* @method \FFI\CData GetContentFromSlice(\FFI\CData $slice)
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* @method int GetSliceLen(\FFI\CData $slice)
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* @method \FFI\CData NewMediaData()
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* @method void FreeMediaData(\FFI\CData $md)
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* @method \FFI\CData GetOutIndexBuf(\FFI\CData $md)
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* @method \FFI\CData GetData(\FFI\CData $md)
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* @method int GetIndexLen(\FFI\CData $md)
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* @method int GetDataLen(\FFI\CData $md)
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* @method int IsMediaDataFinish(\FFI\CData $md)
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*/
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interface WeComFinanceSdkBinding
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{
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}
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/**
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* 企业微信「会话内容存档」官方 C SDK 的 PHP FFI 封装
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*
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* @see https://developer.work.weixin.qq.com/document/path/91774 会话存档开发接入指南
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*
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* 官方动态库（需自行下载后放到服务器）：
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* Linux: libWeWorkFinanceSdk_C.so
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* Windows: WeWorkFinanceSdk.dll
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*
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* 下载地址：https://developer.work.weixin.qq.com/document/path/91883
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*
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* 关键点：
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* 1. 调用 GetChatData 获取一批 encrypt_random_key + encrypt_chat_msg
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* 2. encrypt_random_key 是 RSA 公钥加密的，需用企业后台上传公钥对应的私钥解出 AES 密钥
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* 3. AES 密钥 + encrypt_chat_msg 调 DecryptData 得到最终明文 JSON
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* 4. 消息 msgtype 为 image/voice/video/file/emotion/chatrecord(含 voip_doc_share) 时需额外调 GetMediaData
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* 可能分片返回（is_finish=0 时带 out_index_buf 继续下一片）
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*
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* 本类对「SDK 未安装 / 未启用」场景做了 noop 兼容：构造时若 `msgaudit_enabled=false`
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* 或动态库路径为空，则 isAvailable() 返回 false，所有操作返回安全空结构，不抛异常。
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* 上层（Archive 拉取命令）按 isAvailable() 分支。
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*/
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class WeComFinanceSdkClient
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{
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/** @var FFI&WeComFinanceSdkBinding|null */
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private $ffi = null;
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/** @var \FFI\CData|null NewSdk() 的返回值 */
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private $sdk = null;
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private bool $inited = false;
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private bool $available = false;
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private string $corpId = '';
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private string $secret = '';
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private string $libPath = '';
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private string $proxy = '';
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private string $proxyPasswd = '';
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private int $timeout = 60;
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private int $limit = 500;
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/** @var array<int, string> 私钥 PEM，按 public_key_ver 索引（允许配置多版本轮换） */
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private array $privateKeys = [];
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private string $lastError = '';
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public function __construct()
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{
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$enabled = (bool) config('pay.wechat_work.msgaudit_enabled', false);
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$this->corpId = (string) config('pay.wechat_work.corp_id', '');
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$this->secret = (string) config('pay.wechat_work.msgaudit_secret', '');
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$this->libPath = (string) config('pay.wechat_work.msgaudit_sdk_lib_path', '');
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$this->proxy = (string) config('pay.wechat_work.msgaudit_proxy', '');
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$this->proxyPasswd = (string) config('pay.wechat_work.msgaudit_proxy_passwd', '');
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$this->timeout = (int) config('pay.wechat_work.msgaudit_timeout', 60);
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$this->limit = (int) config('pay.wechat_work.msgaudit_limit', 500);
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$this->privateKeys = $this->loadPrivateKeys();
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if (!$enabled) {
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$this->lastError = 'msgaudit not enabled';
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return;
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}
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if ($this->corpId === '' || $this->secret === '' || $this->libPath === '') {
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$this->lastError = 'msgaudit config incomplete (corp_id / msgaudit_secret / msgaudit_sdk_lib_path)';
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return;
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}
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if (!extension_loaded('ffi')) {
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$this->lastError = 'php ffi extension not loaded';
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return;
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}
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if (!is_file($this->libPath)) {
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$this->lastError = 'msgaudit sdk lib not found: ' . $this->libPath;
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return;
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}
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if (empty($this->privateKeys)) {
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$this->lastError = 'msgaudit private key not configured';
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return;
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}
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try {
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$this->ffi = FFI::cdef($this->cdef(), $this->libPath);
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$this->sdk = $this->ffi->NewSdk();
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$ret = $this->ffi->Init($this->sdk, $this->corpId, $this->secret);
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if ($ret !== 0) {
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$this->lastError = 'SDK Init failed, ret=' . $ret;
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$this->ffi->DestroySdk($this->sdk);
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$this->sdk = null;
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return;
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}
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$this->inited = true;
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$this->available = true;
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} catch (\Throwable $e) {
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$this->lastError = 'FFI error: ' . $e->getMessage();
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$this->sdk = null;
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}
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}
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public function __destruct()
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{
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try {
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if ($this->sdk !== null && $this->ffi !== null) {
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$this->ffi->DestroySdk($this->sdk);
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}
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} catch (\Throwable $e) {
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// 忽略析构异常
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}
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}
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public function isAvailable(): bool
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{
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return $this->available;
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}
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public function getLastError(): string
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{
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return $this->lastError;
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}
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public function getTimeout(): int
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{
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return $this->timeout;
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}
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public function getLimit(): int
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{
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return $this->limit;
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}
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/**
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* 拉取一批消息；返回解密后的明文数组（每条含 msgid、action、msgtype、content-like 字段等）
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*
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* @param int $seq 上次拉取到的最大 seq，首次传 0
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* @param int $limit 单次条数，官方上限 1000
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*
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* @return array{
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* ok: bool,
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* error: string,
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* messages: array<int, array<string, mixed>>,
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* next_seq: int,
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* }
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*/
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public function pullChatData(int $seq = 0, ?int $limit = null): array
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{
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if (!$this->available) {
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return [
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'ok' => false,
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'error' => $this->lastError !== '' ? $this->lastError : 'sdk unavailable',
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'messages' => [],
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'next_seq' => $seq,
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];
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}
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$limit = $limit === null ? $this->limit : $limit;
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$limit = (int) min(1000, max(1, $limit));
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$slice = null;
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try {
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$slice = $this->ffi->NewSlice();
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$ret = $this->ffi->GetChatData(
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$this->sdk,
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$seq,
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$limit,
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$this->proxy,
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$this->proxyPasswd,
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$this->timeout,
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$slice
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);
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if ($ret !== 0) {
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return [
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'ok' => false,
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'error' => 'GetChatData failed, ret=' . $ret,
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'messages' => [],
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'next_seq' => $seq,
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];
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}
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$json = $this->sliceToString($slice);
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$decoded = json_decode($json, true);
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if (!is_array($decoded) || !isset($decoded['chatdata']) || !is_array($decoded['chatdata'])) {
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return [
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'ok' => true,
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'error' => '',
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'messages' => [],
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'next_seq' => $seq,
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];
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}
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$messages = [];
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$nextSeq = $seq;
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foreach ($decoded['chatdata'] as $entry) {
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if (!is_array($entry)) {
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continue;
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}
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$curSeq = isset($entry['seq']) ? (int) $entry['seq'] : 0;
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if ($curSeq > $nextSeq) {
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$nextSeq = $curSeq;
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}
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$plain = $this->decryptChatItem($entry);
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if ($plain === null) {
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continue;
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}
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$plain['__seq'] = $curSeq;
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$plain['__msgid_sdk'] = (string) ($entry['msgid'] ?? ($plain['msgid'] ?? ''));
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$plain['__publickey_ver'] = (int) ($entry['publickey_ver'] ?? 0);
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$messages[] = $plain;
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}
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return [
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'ok' => true,
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'error' => '',
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'messages' => $messages,
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'next_seq' => $nextSeq,
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];
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} catch (\Throwable $e) {
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return [
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'ok' => false,
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'error' => 'exception: ' . $e->getMessage(),
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'messages' => [],
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'next_seq' => $seq,
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];
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} finally {
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if ($slice !== null) {
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try {
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$this->ffi->FreeSlice($slice);
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} catch (\Throwable $e) {
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// ignore
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}
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}
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}
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}
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/**
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* 下载媒体（image/voice/video/file/emotion）到本地文件
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*
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* @param string $sdkFileid 消息明文里的 sdkfileid
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* @param string $destPath 目标绝对路径
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*
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* @return array{ok: bool, error: string, size: int}
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*/
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public function downloadMedia(string $sdkFileid, string $destPath): array
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{
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if (!$this->available) {
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return ['ok' => false, 'error' => $this->lastError !== '' ? $this->lastError : 'sdk unavailable', 'size' => 0];
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}
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if ($sdkFileid === '') {
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return ['ok' => false, 'error' => 'empty sdkfileid', 'size' => 0];
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}
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$dir = dirname($destPath);
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if (!is_dir($dir) && !mkdir($dir, 0755, true) && !is_dir($dir)) {
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return ['ok' => false, 'error' => 'mkdir failed: ' . $dir, 'size' => 0];
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}
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$fp = @fopen($destPath, 'wb');
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if ($fp === false) {
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return ['ok' => false, 'error' => 'fopen failed: ' . $destPath, 'size' => 0];
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}
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$indexBuf = '';
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$totalSize = 0;
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$chunkCount = 0;
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$maxChunks = 10000; // 安全上限，防止 SDK 异常时死循环
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try {
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while ($chunkCount++ < $maxChunks) {
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$mediaData = $this->ffi->NewMediaData();
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try {
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$ret = $this->ffi->GetMediaData(
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$this->sdk,
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$indexBuf,
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$sdkFileid,
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$this->proxy,
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$this->proxyPasswd,
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$this->timeout,
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$mediaData
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);
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if ($ret !== 0) {
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fclose($fp);
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@unlink($destPath);
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return ['ok' => false, 'error' => 'GetMediaData failed, ret=' . $ret . ' chunk=' . $chunkCount, 'size' => 0];
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}
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$dataLen = (int) $this->ffi->GetDataLen($mediaData);
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if ($dataLen > 0) {
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$dataPtr = $this->ffi->GetData($mediaData);
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$chunk = FFI::string($dataPtr, $dataLen);
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fwrite($fp, $chunk);
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$totalSize += strlen($chunk);
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}
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$isFinish = (int) $this->ffi->IsMediaDataFinish($mediaData);
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if ($isFinish === 1) {
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break;
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}
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$indexLen = (int) $this->ffi->GetIndexLen($mediaData);
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if ($indexLen > 0) {
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$indexPtr = $this->ffi->GetOutIndexBuf($mediaData);
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$indexBuf = FFI::string($indexPtr, $indexLen);
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} else {
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// 无 index 又 not finish，保护性退出
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break;
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}
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} finally {
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$this->ffi->FreeMediaData($mediaData);
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}
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}
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fclose($fp);
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return ['ok' => true, 'error' => '', 'size' => $totalSize];
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} catch (\Throwable $e) {
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if (is_resource($fp)) {
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fclose($fp);
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}
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@unlink($destPath);
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return ['ok' => false, 'error' => 'exception: ' . $e->getMessage(), 'size' => 0];
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}
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}
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/**
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* 单条消息解密：encrypt_random_key（RSA）-> AES key -> DecryptData 明文
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*
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* @return array<string, mixed>|null
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*/
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private function decryptChatItem(array $entry): ?array
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{
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$encryptRandomKeyB64 = (string) ($entry['encrypt_random_key'] ?? '');
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$encryptChatMsg = (string) ($entry['encrypt_chat_msg'] ?? '');
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$publicKeyVer = (int) ($entry['publickey_ver'] ?? 0);
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if ($encryptRandomKeyB64 === '' || $encryptChatMsg === '') {
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return null;
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}
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$privateKey = $this->privateKeys[$publicKeyVer] ?? null;
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if ($privateKey === null) {
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// 尝试唯一配置的私钥兜底
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$privateKey = reset($this->privateKeys) ?: null;
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}
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if ($privateKey === null) {
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Log::warning(sprintf('会话存档-无匹配私钥 publickey_ver=%d', $publicKeyVer));
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return null;
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}
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$encryptRandomKey = base64_decode($encryptRandomKeyB64, true);
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if ($encryptRandomKey === false) {
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return null;
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}
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$aesKey = null;
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// 企微会话存档默认 RSA-PKCS1 填充；部分版本可能使用 OAEP，兼容尝试
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if (openssl_private_decrypt($encryptRandomKey, $decrypted, $privateKey, OPENSSL_PKCS1_PADDING)) {
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$aesKey = $decrypted;
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} elseif (openssl_private_decrypt($encryptRandomKey, $decrypted, $privateKey, OPENSSL_PKCS1_OAEP_PADDING)) {
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$aesKey = $decrypted;
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} else {
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Log::warning(sprintf(
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'会话存档-RSA 解密失败 publickey_ver=%d err=%s',
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$publicKeyVer,
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(string) openssl_error_string()
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));
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return null;
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}
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$slice = null;
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try {
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$slice = $this->ffi->NewSlice();
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$ret = $this->ffi->DecryptData($aesKey, $encryptChatMsg, $slice);
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if ($ret !== 0) {
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Log::warning('会话存档-DecryptData 失败 ret=' . $ret);
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return null;
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}
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$plain = $this->sliceToString($slice);
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$json = json_decode($plain, true);
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if (!is_array($json)) {
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return null;
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}
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return $json;
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} finally {
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if ($slice !== null) {
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try {
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$this->ffi->FreeSlice($slice);
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} catch (\Throwable $e) {
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// ignore
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}
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}
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}
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}
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private function sliceToString(\FFI\CData $slice): string
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{
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$len = (int) $this->ffi->GetSliceLen($slice);
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if ($len <= 0) {
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return '';
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}
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$buf = $this->ffi->GetContentFromSlice($slice);
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return FFI::string($buf, $len);
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}
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/**
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* @return array<int, string> publickey_ver => pem
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*/
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private function loadPrivateKeys(): array
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{
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$ver = (int) config('pay.wechat_work.msgaudit_public_key_ver', 0);
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$pemFromPath = '';
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$path = (string) config('pay.wechat_work.msgaudit_private_key_path', '');
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if ($path !== '' && is_file($path) && is_readable($path)) {
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$pemFromPath = (string) file_get_contents($path);
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}
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$pemInline = (string) config('pay.wechat_work.msgaudit_private_key', '');
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$pem = $pemFromPath !== '' ? $pemFromPath : $pemInline;
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if ($pem === '') {
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return [];
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}
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// 允许配置里是 \n 转义；标准化换行
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$pem = str_replace(["\r\n", "\\n"], ["\n", "\n"], $pem);
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if (strpos($pem, '-----BEGIN') === false) {
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// 容忍纯 base64：按 64 列切并补头尾
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$pem = "-----BEGIN RSA PRIVATE KEY-----\n" . chunk_split(trim($pem), 64, "\n") . "-----END RSA PRIVATE KEY-----\n";
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}
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// 支持未来扩展多版本；目前只有一把，默认索引为配置的 ver（>=1），若为 0 则归到 key=0
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return [$ver => $pem];
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}
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/**
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* 官方 C SDK 头文件的 FFI cdef；与 libWeWorkFinanceSdk_C 头文件完全对应。
|
||
*
|
||
* 官方定义（简化）：
|
||
* struct Slice_t { char* buf; int len; };
|
||
* struct MediaData_t { char* outindexbuf; char* data; int data_len; int is_finish; };
|
||
*/
|
||
private function cdef(): string
|
||
{
|
||
return <<<'CDEF'
|
||
typedef struct Slice {
|
||
char *buf;
|
||
int len;
|
||
} Slice_t;
|
||
|
||
typedef struct MediaData {
|
||
char *outindexbuf;
|
||
int outindexbuf_len;
|
||
char *data;
|
||
int data_len;
|
||
int is_finish;
|
||
} MediaData_t;
|
||
|
||
typedef void WeWorkFinanceSdk_t;
|
||
|
||
WeWorkFinanceSdk_t* NewSdk();
|
||
int Init(WeWorkFinanceSdk_t* sdk, const char* corpid, const char* secret);
|
||
void DestroySdk(WeWorkFinanceSdk_t* sdk);
|
||
|
||
int GetChatData(WeWorkFinanceSdk_t* sdk, unsigned long long seq, unsigned int limit,
|
||
const char* proxy, const char* passwd, int timeout, Slice_t* chatData);
|
||
|
||
int DecryptData(const char* encrypt_key, const char* encrypt_msg, Slice_t* msg);
|
||
|
||
int GetMediaData(WeWorkFinanceSdk_t* sdk, const char* indexbuf, const char* sdkFileid,
|
||
const char* proxy, const char* passwd, int timeout, MediaData_t* mediaData);
|
||
|
||
Slice_t* NewSlice();
|
||
void FreeSlice(Slice_t* slice);
|
||
char* GetContentFromSlice(Slice_t* slice);
|
||
int GetSliceLen(Slice_t* slice);
|
||
|
||
MediaData_t* NewMediaData();
|
||
void FreeMediaData(MediaData_t* mediaData);
|
||
char* GetOutIndexBuf(MediaData_t* mediaData);
|
||
char* GetData(MediaData_t* mediaData);
|
||
int GetIndexLen(MediaData_t* mediaData);
|
||
int GetDataLen(MediaData_t* mediaData);
|
||
int IsMediaDataFinish(MediaData_t* mediaData);
|
||
CDEF;
|
||
}
|
||
}
|