已测试某音(28.4.0), 某茄小说(6.0.5.32)
原理
获取SSL_CTX_set_custom_verify的参数3(回调函数)
void SSL_CTX_set_custom_verify(SSL_CTX *ctx, int mode, enum ssl_verify_result_t (*callback)(SSL *ssl, uint8_t *out_alert)) {ctx->verify_mode = mode;ctx->custom_verify_callback = callback;}
enum ssl_verify_result_t BORINGSSL_ENUM_INT {ssl_verify_ok,ssl_verify_invalid,ssl_verify_retry,};
代码编写
function main() {Java.perform(function () {let SSL_CTX_set_custom_verify = Module.getExportByName('libsscronet.so', 'SSL_CTX_set_custom_verify');}}setImmediate(main);
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setTimeout(main, 3000);延时执行函数 -
hook系统函数, 监听so加载
function onLoad(name, callback) {//void* android_dlopen_ext(const char* filename, int flag, const android_dlextinfo* extinfo);//原型const android_dlopen_ext = Module.findExportByName(null, "android_dlopen_ext");if (android_dlopen_ext != null) {Interceptor.attach(android_dlopen_ext, {onEnter: function (args) {if (args[0].readCString().indexOf(name) !== -1) {this.hook = true;}},onLeave: function (retval) {if (this.hook) {callback();}}});}}onLoad(soName, () => {let SSL_CTX_set_custom_verify = Module.getExportByName('libsscronet.so', 'SSL_CTX_set_custom_verify');if (SSL_CTX_set_custom_verify != null) {Interceptor.attach(SSL_CTX_set_custom_verify, {onEnter: function (args) {Interceptor.attach(args[2], {onLeave: function (retval) {if (retval > 0x0) retval.replace(0x0);}});}});}});
效果图
完整代码已经上传至github https://github.com/LanBaiCode/FridaScripts
作者：Slimu原文：https://www.52pojie.cn/thread-1879263-1-1.html
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