原创 | 一文帮你解决APP抓包难题
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前言
而测试人员对APP进行渗透的首步操作通常就是上burp或者Charles这类抓包工具进行抓包，查看请求记录里的域名及链接地址是否可以进一步利用，但是如果遇到一些APP出现证书报错或者抓不到包的情况该怎么办，读过本篇文章之后，相信你会拥有一些新的解决方案和思考。
数字证书
https://www.cnblogs.com/TF511/articles/10791460.html
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数字签名是发送方的明文经历了两次加密得到的两个东西组成，一个是hash ，一个是经过私钥加密。 -
数字证书就是明文+数字签名。但是数字证书中的内容远不止这俩，还包括了权威机构的信息，服务器的域名，最重要的是有签名的计算方法，不然用公钥进行解密之后的hash，如何与加密明文进行对比呢，还有证书中还包括公钥，公钥用于发放给请求证书的客户端。 -
HTTPS就是使用SSL/TLS协议进行加密传输，让客户端拿到服务器的公钥，然后客户端随机生成一个对称加密的秘钥，使用公钥加密，传输给服务端，后续的所有信息都通过该对称秘钥进行加密解密，完成整个HTTPS的流程。
https抓包
导入用户证书
但是，在Android 7.0以前，应用默认会信任系统证书和用户证书，Android 7.0开始，默认只信任系统证书。 所以如果你的手机是处于Android7.0以上版本的话，并且在没有绑定SSL证书的情况下，也会抓不到包，从安卓开发的角度可以很清楚的看到这一点。
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系统证书路径：/system/etc/security/cacerts/ -
用户证书路径：/data/misc/user/0/cacerts-added/
移动到系统根证书路径的方法：
1、导出burp.der
2、使用openssl更改证书格式,先将burp证书的der格式转成pem,再获取证书的hash
openssl x509 -inform DER -in burp.der -out burp.pemopenssl x509 -inform PEM -subject_hash_old -in burp.pem
mv burp.pem 9a5ba575.0由于系统读写权限问题，不一定能直接上传到system目录
adb push 9a5ba575.0 /sdcardadb shellmount -o remount,rw /systemcp /sdcard/9a5ba575.0 /system/etc/security/cacerts/chmod 644 /system/etc/security/cacerts/9a5ba575.0
移动完成之后，再打开【设置】-【安全】-【信任的凭据】验证一下
证书有效期过长
openssl genrsa -out key.pem 3072 -nodesopenssl req -new -x509 -key key.pem -sha256 -config openssl.cnf -out cert.pem -days 730 -subj "/C=JP/ST=/L=/O=m4bln/CN=MY CA"openssl pkcs12 -export -inkey key.pem -in cert.pem -out cert_and_key.pfx把cert_and_key.pfx导入burp
目前还没遇到过这种情况，但是如果遇到了这种问题要知道怎么解决。
以上两种方法都是仅依靠了系统校验证书的方式进行抓包，APP在整个请求HTTPS的请求过程时还并未进行证书校验，和在普通的浏览器中访问并无区别，只是要将想要被信任的证书放入系统证书路径内。
SSLPinning
apktool d -s <file.apk> -o <outdir>开发人员经常会将网络配置的相关文件保存到指定位置，如下图就指定在了xml目录下。
在配置文件中检验的两种方法
<network-security-config xmlns:tools="http://schemas.android.com/tools"><!--允许http访问--><base-config cleartextTrafficPermitted="true"tools:ignore="InsecureBaseConfiguration" /><!--证书校验--><domain-config><domain includeSubdomains="true">www.ttt.com</domain><trust-anchors><certificates src="@raw/ttt"/></trust-anchors></domain-config><!--公钥校验--><domain-config cleartextTrafficPermitted="true"><domain includeSubdomains="true">ttt.com</domain><!--利用xml校验证书公钥的hash值--><pin-set expiration="2099-01-01"tools:ignore="MissingBackupPin"><pin digest="SHA-256">7VMdvZE3PGbxb0Pgf1PlCp+MI8KZ2ZC5psM8TIylNDA=</pin></pin-set><!--利用xml校验证书的公钥文件--><trust-anchors><certificates src="@raw/ttt"/></trust-anchors></domain-config></network-security-config>
二是最常用的也是最好用的frida来hook关键函数进行绕过，后面会讲解。当然有些人会直接在真机或者模拟器上安装xposed模块，但是我个人觉得每次使用都要软重启，可能还会造成卡机，所以感觉还是使用frida最方便。
在代码中检验的两种方法
String hostname = "www.ttt.com";CertificatePinner certificatePinner = new CertificatePinner.Builder().add(hostname, "sha256/7VMdvZE3PGbxb0Pgf1PlCp+MI8KZ2ZC5psM8TIylNDA=").build();OkHttpClient client = new OkHttpClient.Builder().certificatePinner(certificatePinner).hostnameVerifier(new HostnameVerifier() {public boolean verify(String hostname, SSLSession session) {return true;}}).build();
2.利用代码校验证书的公钥证书文件
// 获取证书输入流InputStream openRawResource = getApplicationContext().getResources().openRawResource(R.raw.ttt);Certificate ca = CertificateFactory.getInstance("X.509").generateCertificate(openRawResource);// 创建 Keystore 包含我们的证书KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());keyStore.load(null, null);keyStore.setCertificateEntry("ca", ca);// 创建一个 TrustManager 仅把 Keystore 中的证书 作为信任的锚点TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); // 建议不要使用自己实现的X509TrustManager，而是使用默认的X509TrustManagertrustManagerFactory.init(keyStore);// 用 TrustManager 初始化一个 SSLContextsslContext = SSLContext.getInstance("TLS"); //定义：public static SSLContext sslContext = null;sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());OkHttpClient client = new OkHttpClient.Builder().sslSocketFactory(sslContext.getSocketFactory(),(X509TrustManager) trustManagerFactory.getTrustManagers()[0] ).hostnameVerifier(new HostnameVerifier() {public boolean verify(String hostname, SSLSession session) {return true;}}).build();
/* Android ssl certificate pinning bypass script for various methodsby Maurizio Siddu modify by Ch3nYeRun with:frida -U -f [APP_ID] -l frida_multiple_unpinning.js --no-pause*/setTimeout(function() {Java.perform(function () {console.log('');console.log('======');console.log('[#] Android Bypass for various Certificate Pinning methods [#]');console.log('======');var X509TrustManager = Java.use('javax.net.ssl.X509TrustManager');var SSLContext = Java.use('javax.net.ssl.SSLContext');// TrustManager (Android < 7) //////////////////////////////////var TrustManager = Java.registerClass({// Implement a custom TrustManagername: 'dev.asd.test.TrustManager',implements: [X509TrustManager],methods: {checkClientTrusted: function (chain, authType) {},checkServerTrusted: function (chain, authType) {},getAcceptedIssuers: function () {return []; }}});// Prepare the TrustManager array to pass to SSLContext.init()var TrustManagers = [TrustManager.$new()];// Get a handle on the init() on the SSLContext classvar SSLContext_init = SSLContext.init.overload('[Ljavax.net.ssl.KeyManager;', '[Ljavax.net.ssl.TrustManager;', 'java.security.SecureRandom');try {// Override the init method, specifying the custom TrustManagerSSLContext_init.implementation = function(keyManager, trustManager, secureRandom) {console.log('[+] Bypassing Trustmanager (Android < 7) request');SSLContext_init.call(this, keyManager, TrustManagers, secureRandom);};} catch (err) {console.log('[-] TrustManager (Android < 7) pinner not found');//console.log(err);}// OkHTTPv3 (quadruple bypass) ///////////////////////////////////try {// Bypass OkHTTPv3 {1}var okhttp3_Activity_1 = Java.use('okhttp3.CertificatePinner');okhttp3_Activity_1.check.overload('java.lang.String', 'java.util.List').implementation = function (a, b) {console.log('[+] Bypassing OkHTTPv3 {1}: ' + a);return true;};} catch (err) {console.log('[-] OkHTTPv3 {1} pinner not found');//console.log(err);}try {// Bypass OkHTTPv3 {2}// This method of CertificatePinner.check could be found in some old Android appvar okhttp3_Activity_2 = Java.use('okhttp3.CertificatePinner');okhttp3_Activity_2.check.overload('java.lang.String', 'java.security.cert.Certificate').implementation = function (a, b) {console.log('[+] Bypassing OkHTTPv3 {2}: ' + a);return true;};} catch (err) {console.log('[-] OkHTTPv3 {2} pinner not found');//console.log(err);}try {// Bypass OkHTTPv3 {3}var okhttp3_Activity_3 = Java.use('okhttp3.CertificatePinner');okhttp3_Activity_3.check.overload('java.lang.String', '[Ljava.security.cert.Certificate;').implementation = function (a, b) {console.log('[+] Bypassing OkHTTPv3 {3}: ' + a);return true;};} catch(err) {console.log('[-] OkHTTPv3 {3} pinner not found');//console.log(err);}try {// Bypass OkHTTPv3 {4}var okhttp3_Activity_4 = Java.use('okhttp3.CertificatePinner');okhttp3_Activity_4[''].implementation = function (a, b) {console.log('[+] Bypassing OkHTTPv3 {4}: ' + a);};} catch(err) {console.log('[-] OkHTTPv3 {4} pinner not found');//console.log(err);}// Trustkit (triple bypass) ////////////////////////////////try {// Bypass Trustkit {1}var trustkit_Activity_1 = Java.use('com.datatheorem.android.trustkit.pinning.OkHostnameVerifier');trustkit_Activity_1.verify.overload('java.lang.String', 'javax.net.ssl.SSLSession').implementation = function (a, b) {console.log('[+] Bypassing Trustkit {1}: ' + a);return true;};} catch (err) {console.log('[-] Trustkit {1} pinner not found');//console.log(err);}try {// Bypass Trustkit {2}var trustkit_Activity_2 = Java.use('com.datatheorem.android.trustkit.pinning.OkHostnameVerifier');trustkit_Activity_2.verify.overload('java.lang.String', 'java.security.cert.X509Certificate').implementation = function (a, b) {console.log('[+] Bypassing Trustkit {2}: ' + a);return true;};} catch (err) {console.log('[-] Trustkit {2} pinner not found');//console.log(err);}try {// Bypass Trustkit {3}var trustkit_PinningTrustManager = Java.use('com.datatheorem.android.trustkit.pinning.PinningTrustManager');trustkit_PinningTrustManager.checkServerTrusted.implementation = function () {console.log('[+] Bypassing Trustkit {3}');};} catch (err) {console.log('[-] Trustkit {3} pinner not found');//console.log(err);}// TrustManagerImpl (Android > 7) //////////////////////////////////////try {var TrustManagerImpl = Java.use('com.android.org.conscrypt.TrustManagerImpl');TrustManagerImpl.verifyChain.implementation = function (untrustedChain, trustAnchorChain, host, clientAuth, ocspData, tlsSctData) {console.log('[+] Bypassing TrustManagerImpl (Android > 7): ' + host);return untrustedChain;};} catch (err) {console.log('[-] TrustManagerImpl (Android > 7) pinner not found');//console.log(err);}// Appcelerator Titanium /////////////////////////////try {var appcelerator_PinningTrustManager = Java.use('appcelerator.https.PinningTrustManager');appcelerator_PinningTrustManager.checkServerTrusted.implementation = function () {console.log('[+] Bypassing Appcelerator PinningTrustManager');};} catch (err) {console.log('[-] Appcelerator PinningTrustManager pinner not found');//console.log(err);}// OpenSSLSocketImpl Conscrypt ///////////////////////////////////try {var OpenSSLSocketImpl = Java.use('com.android.org.conscrypt.OpenSSLSocketImpl');OpenSSLSocketImpl.verifyCertificateChain.implementation = function (certRefs, JavaObject, authMethod) {console.log('[+] Bypassing OpenSSLSocketImpl Conscrypt');};} catch (err) {console.log('[-] OpenSSLSocketImpl Conscrypt pinner not found');//console.log(err);}// OpenSSLEngineSocketImpl Conscrypt /////////////////////////////////////////try {var OpenSSLEngineSocketImpl_Activity = Java.use('com.android.org.conscrypt.OpenSSLEngineSocketImpl');OpenSSLSocketImpl_Activity.verifyCertificateChain.overload('[Ljava.lang.Long;', 'java.lang.String').implementation = function (a, b) {console.log('[+] Bypassing OpenSSLEngineSocketImpl Conscrypt: ' + b);};} catch (err) {console.log('[-] OpenSSLEngineSocketImpl Conscrypt pinner not found');//console.log(err);}// OpenSSLSocketImpl Apache Harmony ////////////////////////////////////////try {var OpenSSLSocketImpl_Harmony = Java.use('org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl');OpenSSLSocketImpl_Harmony.verifyCertificateChain.implementation = function (asn1DerEncodedCertificateChain, authMethod) {console.log('[+] Bypassing OpenSSLSocketImpl Apache Harmony');};} catch (err) {console.log('[-] OpenSSLSocketImpl Apache Harmony pinner not found');//console.log(err);}// PhoneGap sslCertificateChecker (https://github.com/EddyVerbruggen/SSLCertificateChecker-PhoneGap-Plugin) ////////////////////////////////////////////////////////////////////////////////////////////////////////////////try {var phonegap_Activity = Java.use('nl.xservices.plugins.sslCertificateChecker');phonegap_Activity.execute.overload('java.lang.String', 'org.json.JSONArray', 'org.apache.cordova.CallbackContext').implementation = function (a, b, c) {console.log('[+] Bypassing PhoneGap sslCertificateChecker: ' + a);return true;};} catch (err) {console.log('[-] PhoneGap sslCertificateChecker pinner not found');//console.log(err);}// IBM MobileFirst pinTrustedCertificatePublicKey (double bypass) //////////////////////////////////////////////////////////////////////try {// Bypass IBM MobileFirst {1}var WLClient_Activity_1 = Java.use('com.worklight.wlclient.api.WLClient');WLClient_Activity_1.getInstance().pinTrustedCertificatePublicKey.overload('java.lang.String').implementation = function (cert) {console.log('[+] Bypassing IBM MobileFirst pinTrustedCertificatePublicKey {1}: ' + cert);return;};} catch (err) {console.log('[-] IBM MobileFirst pinTrustedCertificatePublicKey {1} pinner not found');//console.log(err);}try {// Bypass IBM MobileFirst {2}var WLClient_Activity_2 = Java.use('com.worklight.wlclient.api.WLClient');WLClient_Activity_2.getInstance().pinTrustedCertificatePublicKey.overload('[Ljava.lang.String;').implementation = function (cert) {console.log('[+] Bypassing IBM MobileFirst pinTrustedCertificatePublicKey {2}: ' + cert);return;};} catch (err) {console.log('[-] IBM MobileFirst pinTrustedCertificatePublicKey {2} pinner not found');//console.log(err);}// IBM WorkLight (ancestor of MobileFirst) HostNameVerifierWithCertificatePinning (quadruple bypass) /////////////////////////////////////////////////////////////////////////////////////////////////////////try {// Bypass IBM WorkLight {1}var worklight_Activity_1 = Java.use('com.worklight.wlclient.certificatepinning.HostNameVerifierWithCertificatePinning');worklight_Activity_1.verify.overload('java.lang.String', 'javax.net.ssl.SSLSocket').implementation = function (a, b) {console.log('[+] Bypassing IBM WorkLight HostNameVerifierWithCertificatePinning {1}: ' + a);return;};} catch (err) {console.log('[-] IBM WorkLight HostNameVerifierWithCertificatePinning {1} pinner not found');//console.log(err);}try {// Bypass IBM WorkLight {2}var worklight_Activity_2 = Java.use('com.worklight.wlclient.certificatepinning.HostNameVerifierWithCertificatePinning');worklight_Activity_2.verify.overload('java.lang.String', 'java.security.cert.X509Certificate').implementation = function (a, b) {console.log('[+] Bypassing IBM WorkLight HostNameVerifierWithCertificatePinning {2}: ' + a);return;};} catch (err) {console.log('[-] IBM WorkLight HostNameVerifierWithCertificatePinning {2} pinner not found');//console.log(err);}try {// Bypass IBM WorkLight {3}var worklight_Activity_3 = Java.use('com.worklight.wlclient.certificatepinning.HostNameVerifierWithCertificatePinning');worklight_Activity_3.verify.overload('java.lang.String', '[Ljava.lang.String;', '[Ljava.lang.String;').implementation = function (a, b) {console.log('[+] Bypassing IBM WorkLight HostNameVerifierWithCertificatePinning {3}: ' + a);return;};} catch (err) {console.log('[-] IBM WorkLight HostNameVerifierWithCertificatePinning {3} pinner not found');//console.log(err);}try {// Bypass IBM WorkLight {4}var worklight_Activity_4 = Java.use('com.worklight.wlclient.certificatepinning.HostNameVerifierWithCertificatePinning');worklight_Activity_4.verify.overload('java.lang.String', 'javax.net.ssl.SSLSession').implementation = function (a, b) {console.log('[+] Bypassing IBM WorkLight HostNameVerifierWithCertificatePinning {4}: ' + a);return true;};} catch (err) {console.log('[-] IBM WorkLight HostNameVerifierWithCertificatePinning {4} pinner not found');//console.log(err);}// Conscrypt CertPinManager ////////////////////////////////try {var conscrypt_CertPinManager_Activity = Java.use('com.android.org.conscrypt.CertPinManager');conscrypt_CertPinManager_Activity.isChainValid.overload('java.lang.String', 'java.util.List').implementation = function (a, b) {console.log('[+] Bypassing Conscrypt CertPinManager: ' + a);return true;};} catch (err) {console.log('[-] Conscrypt CertPinManager pinner not found');//console.log(err);}// CWAC-Netsecurity (unofficial back-port pinner for Android<4.2) CertPinManager /////////////////////////////////////////////////////////////////////////////////////try {var cwac_CertPinManager_Activity = Java.use('com.commonsware.cwac.netsecurity.conscrypt.CertPinManager');cwac_CertPinManager_Activity.isChainValid.overload('java.lang.String', 'java.util.List').implementation = function (a, b) {console.log('[+] Bypassing CWAC-Netsecurity CertPinManager: ' + a);return true;};} catch (err) {console.log('[-] CWAC-Netsecurity CertPinManager pinner not found');//console.log(err);}// Worklight Androidgap WLCertificatePinningPlugin ///////////////////////////////////////////////////////try {var androidgap_WLCertificatePinningPlugin_Activity = Java.use('com.worklight.androidgap.plugin.WLCertificatePinningPlugin');androidgap_WLCertificatePinningPlugin_Activity.execute.overload('java.lang.String', 'org.json.JSONArray', 'org.apache.cordova.CallbackContext').implementation = function (a, b, c) {console.log('[+] Bypassing Worklight Androidgap WLCertificatePinningPlugin: ' + a);return true;};} catch (err) {console.log('[-] Worklight Androidgap WLCertificatePinningPlugin pinner not found');//console.log(err);}// Netty FingerprintTrustManagerFactory ////////////////////////////////////////////try {var netty_FingerprintTrustManagerFactory = Java.use('io.netty.handler.ssl.util.FingerprintTrustManagerFactory');//NOTE: sometimes this below implementation could be useful//var netty_FingerprintTrustManagerFactory = Java.use('org.jboss.netty.handler.ssl.util.FingerprintTrustManagerFactory');netty_FingerprintTrustManagerFactory.checkTrusted.implementation = function (type, chain) {console.log('[+] Bypassing Netty FingerprintTrustManagerFactory');};} catch (err) {console.log('[-] Netty FingerprintTrustManagerFactory pinner not found');//console.log(err);}// Squareup CertificatePinner [OkHTTP<v3] (double bypass) //////////////////////////////////////////////////////////////try {// Bypass Squareup CertificatePinner {1}var Squareup_CertificatePinner_Activity_1 = Java.use('com.squareup.okhttp.CertificatePinner');Squareup_CertificatePinner_Activity_1.check.overload('java.lang.String', 'java.security.cert.Certificate').implementation = function (a, b) {console.log('[+] Bypassing Squareup CertificatePinner {1}: ' + a);return;};} catch (err) {console.log('[-] Squareup CertificatePinner {1} pinner not found');//console.log(err);}try {// Bypass Squareup CertificatePinner {2}var Squareup_CertificatePinner_Activity_2 = Java.use('com.squareup.okhttp.CertificatePinner');Squareup_CertificatePinner_Activity_2.check.overload('java.lang.String', 'java.util.List').implementation = function (a, b) {console.log('[+] Bypassing Squareup CertificatePinner {2}: ' + a);return;};} catch (err) {console.log('[-] Squareup CertificatePinner {2} pinner not found');//console.log(err);}// Squareup OkHostnameVerifier [OkHTTP v3] (double bypass) ///////////////////////////////////////////////////////////////try {// Bypass Squareup OkHostnameVerifier {1}var Squareup_OkHostnameVerifier_Activity_1 = Java.use('com.squareup.okhttp.internal.tls.OkHostnameVerifier');Squareup_OkHostnameVerifier_Activity_1.verify.overload('java.lang.String', 'java.security.cert.X509Certificate').implementation = function (a, b) {console.log('[+] Bypassing Squareup OkHostnameVerifier {1}: ' + a);return true;};} catch (err) {console.log('[-] Squareup OkHostnameVerifier pinner not found');//console.log(err);}try {// Bypass Squareup OkHostnameVerifier {2}var Squareup_OkHostnameVerifier_Activity_2 = Java.use('com.squareup.okhttp.internal.tls.OkHostnameVerifier');Squareup_OkHostnameVerifier_Activity_2.verify.overload('java.lang.String', 'javax.net.ssl.SSLSession').implementation = function (a, b) {console.log('[+] Bypassing Squareup OkHostnameVerifier {2}: ' + a);return true;};} catch (err) {console.log('[-] Squareup OkHostnameVerifier pinner not found');//console.log(err);}// Android WebViewClient (double bypass) /////////////////////////////////////////////try {// Bypass WebViewClient {1} (deprecated from Android 6)var AndroidWebViewClient_Activity_1 = Java.use('android.webkit.WebViewClient');AndroidWebViewClient_Activity_1.onReceivedSslError.overload('android.webkit.WebView', 'android.webkit.SslErrorHandler', 'android.net.http.SslError').implementation = function (obj1, obj2, obj3) {console.log('[+] Bypassing Android WebViewClient {1}');};} catch (err) {console.log('[-] Android WebViewClient {1} pinner not found');//console.log(err)}try {// Bypass WebViewClient {2}var AndroidWebViewClient_Activity_2 = Java.use('android.webkit.WebViewClient');AndroidWebViewClient_Activity_2.onReceivedSslError.overload('android.webkit.WebView', 'android.webkit.WebResourceRequest', 'android.webkit.WebResourceError').implementation = function (obj1, obj2, obj3) {console.log('[+] Bypassing Android WebViewClient {2}');};} catch (err) {console.log('[-] Android WebViewClient {2} pinner not found');//console.log(err)}// Apache Cordova WebViewClient ////////////////////////////////////try {var CordovaWebViewClient_Activity = Java.use('org.apache.cordova.CordovaWebViewClient');CordovaWebViewClient_Activity.onReceivedSslError.overload('android.webkit.WebView', 'android.webkit.SslErrorHandler', 'android.net.http.SslError').implementation = function (obj1, obj2, obj3) {console.log('[+] Bypassing Apache Cordova WebViewClient');obj3.proceed();};} catch (err) {console.log('[-] Apache Cordova WebViewClient pinner not found');//console.log(err);}// Boye AbstractVerifier /////////////////////////////try {var boye_AbstractVerifier = Java.use('ch.boye.httpclientandroidlib.conn.ssl.AbstractVerifier');boye_AbstractVerifier.verify.implementation = function (host, ssl) {console.log('[+] Bypassing Boye AbstractVerifier: ' + host);};} catch (err) {console.log('[-] Boye AbstractVerifier pinner not found');//console.log(err);}});}, 0);
frida -U -f com.example.safehttps -l hook.js --no-pause
开启双向校验
那么如何携带客户端的证书，就要利用burp来操作，将ttt.com的证书添加到TLS客户证书
APP双向校验验证
TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());trustManagerFactory.init((KeyStore) null);TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {throw new IllegalStateException("Unexpected default trust managers:" + Arrays.toString(trustManagers));}trustManager = (X509TrustManager) trustManagers[0];OkHttpClient client = new OkHttpClient.Builder().sslSocketFactory(Objects.requireNonNull(ClientSSLSocketFactory.getSocketFactory(getApplicationContext())), Objects.requireNonNull(trustManager)).hostnameVerifier(new HostnameVerifier() {public boolean verify(String hostname, SSLSession session) {//强行返回true 即验证成功return true;}}).build();
public class ClientSSLSocketFactory {private static final String KEY_STORE_PASSWORD = "123456"; // 证书密码private static InputStream client_input;public static SSLSocketFactory getSocketFactory(Context context) {try {//客户端证书client_input = context.getResources().getAssets().open("client.p12");SSLContext sslContext = SSLContext.getInstance("TLS");KeyStore keyStore = KeyStore.getInstance("PKCS12");keyStore.load(client_input, KEY_STORE_PASSWORD.toCharArray());KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());keyManagerFactory.init(keyStore, KEY_STORE_PASSWORD.toCharArray());sslContext.init(keyManagerFactory.getKeyManagers(), null, new SecureRandom());return sslContext.getSocketFactory();} catch (Exception e) {e.printStackTrace();} finally {try {client_input.close();} catch (IOException e) {e.printStackTrace();}}return null;}}
WebView证书校验
https://github.com/WooyunDota/DroidSSLUnpinning
ssl_logger通杀
eBPF hook 免CA证书
总结
-
在依靠系统或默认浏览器校验证书的情况下，导入burp证书为用户证书是可以抓https包的
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当app支持的最小API为24（Android 7.0）或以上时，默认情况下app只信任系统级别的证书，需要把burp变为系统证书
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自签名证书作为系统证书时，有效期最长不超过825天，用户证书则没有限制
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开启证书校验的APP在使用burp抓包时会报 certtificate_unknown 等错误
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使用frida hook绕过双向证书校验时，必须要将客户端的p12文件导入burp中
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一些脚本仍绕不过可以使用ssl_logger或者逆向代码进行分析验证逻辑，再有针对性的绕过
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p12文件的密钥如果在so层，需要会用IDA进行静态分析lib下的so文件获取关键密钥
看完本篇文章之后，相信你再面对抓不到包的APP或者是https请求也不会手足无措了
参考文章
https://ch3nye.top/Android-HTTPS认证的N种方式和对抗方法总结/
Safehttps
https://github.com/dummersoul/SafeHttpsTest
https://mabin004.github.io/2018/03/05/https中间人攻击原理/
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