add network security config and load CA certs with it

app/src/main/AndroidManifest.xml

@@ -23,7 +23,7 @@
         android:hardwareAccelerated="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:usesCleartextTraffic="true">
+        android:networkSecurityConfig="@xml/network_security_config">
         <meta-data
             android:name="android.webkit.WebView.MetricsOptOut"
             android:value="true"/>

app/src/main/assets/cert/purplei2p.crt

@@ -1,24 +0,0 @@
------BEGIN CERTIFICATE-----
-MIID9zCCAt+gAwIBAgIUervWv7EoWkk4Gt8J34xDR9nhH50wDQYJKoZIhvcNAQEL
-BQAwgYIxCzAJBgNVBAYTAldXMRQwEgYDVQQIDAtJMlAgTmV0d29yazESMBAGA1UE
-CgwJUHVycGxlSTJQMSowKAYDVQQDDCFQdXJwbGVJMlAgQ2VydGlmaWNhdGlvbiBB
-dXRob3JpdHkxHTAbBgkqhkiG9w0BCQEWDnI0c2FzQG1haWwuaTJwMB4XDTE5MDMw
-MzE2MjcxNFoXDTI5MDIyODE2MjcxNFowgYIxCzAJBgNVBAYTAldXMRQwEgYDVQQI
-DAtJMlAgTmV0d29yazESMBAGA1UECgwJUHVycGxlSTJQMSowKAYDVQQDDCFQdXJw
-bGVJMlAgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkxHTAbBgkqhkiG9w0BCQEWDnI0
-c2FzQG1haWwuaTJwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwLEy
-A0TamzrfORA+aIM/NRRGrKYkI9o5Q9UB/pTM8IFlSBREGleUfnC6LFHZeNV+Y1Tn
-jrMBOZ7PmIKjPIv+fJP7KjhHACZdk6iqVZqkiGqE0/V17kG16g1+g05Bj2lkWr94
-mp1rhzBeKJJSI8cG82824qdfDcgWZheziye+O0okENhi0o2bDhg78EnyysJiN/tu
-OuoZSGfC9ZdITbpMWgqwuQcdeBg0FNy4hEqUJWoYNgrghe5uc0WMOjTAegSntYPE
-MeaaZyzlGICZ2F+rKZgTjnzVYW60QlHqfg7sShieSPYIZmeN5l5hZ5GZk9Giaj/X
-4pz4sup2iafKclWAmQIDAQABo2MwYTAdBgNVHQ4EFgQUCARvpDaXqPaF4amObzzV
-GaDoZm4wHwYDVR0jBBgwFoAUCARvpDaXqPaF4amObzzVGaDoZm4wDwYDVR0TBAgw
-BgEB/wIBADAOBgNVHQ8BAf8EBAMCAQYwDQYJKoZIhvcNAQELBQADggEBAKcmGUXV
-gCw8PRHe0+XlkcSTX69e0TIPP+j5uJxMT3BHasvBdyV4FcjuUokHGjAnHal5OV4N
-yWdbRPnIge7su4yLQZzlNM1OzbcRds1wSbqTEpb68R/6E8mv3ms6Rc8AcRoXwusc
-byZvzS9tBSXTQ21wCVrltnIARAYabWlWu+URv+DFvlwMik6H8+DklHSVkPC6K3Ov
-V1aMJztMnJ/XTTsFDS/yvaTfmJFG16LABIiSsEAW5QK64sWsN4sxvpcg0D6/EjWP
-knyLM4KXuD3i08mzwzus8d97AjGxC5RCEFL5ADBpVaDU/5CpmZmZdY1daYjiHrXm
-EVNoSbqid1fAVyA=
------END CERTIFICATE-----

app/src/main/java/org/purplei2p/lightning/utils/Utils.java

@@ -174,6 +174,20 @@ public final class Utils {
      */
     @Nullable
     public static String getDomainName(@Nullable String url) {
+        return getDomainName(url, false);
+    }
+
+/**
+     * Extracts the domain name from a URL.
+     *
+     * @param url the URL to extract the domain from.
+     * @param domainonly flag to return only domain without scheme.
+     * @return the domain name, or the URL if the domain
+     * could not be extracted. The domain name may include
+     * HTTPS if the URL is an SSL supported URL and domainonly is false.
+     */
+    @Nullable
+    public static String getDomainName(@Nullable String url, boolean domainonly) {
         if (url == null || url.isEmpty()) return "";
 
         boolean ssl = URLUtil.isHttpsUrl(url);
@@ -195,7 +209,7 @@ public final class Utils {
         if (domain == null || domain.isEmpty()) {
             return url;
         }
-        if (ssl)
+        if (ssl && !domainonly)
             return Constants.HTTPS + domain;
         else
             return domain.startsWith("www.") ? domain.substring(4) : domain;

app/src/main/java/org/purplei2p/lightning/view/LightningWebClient.java

@@ -98,22 +98,16 @@ public class LightningWebClient extends WebViewClient {
             CertificateException, FileNotFoundException,
             IOException, KeyStoreException, NoSuchAlgorithmException {
 
+        CertificateFactory cf = CertificateFactory.getInstance("X.509");
+        InputStream caInput = mActivity.getResources().openRawResource(R.raw.purplei2p);
+        final Certificate ca = cf.generateCertificate(caInput);
+        Log.d(TAG, "ca-root DN=" + ((X509Certificate) ca).getSubjectDN());
+        caInput.close();
+
         // Create a KeyStore containing our trusted CAs
         String keyStoreType = KeyStore.getDefaultType();
         KeyStore trustedKeyStore = KeyStore.getInstance(keyStoreType);
         trustedKeyStore.load(null, null);
-
-        CertificateFactory cf = CertificateFactory.getInstance("X.509");
-
-        InputStream caInput = new BufferedInputStream(mActivity.getResources().getAssets().open("cert/purplei2p.crt"));
-            Certificate ca;
-            try {
-                ca = cf.generateCertificate(caInput);
-                Log.d(TAG, "ca-root DN=" + ((X509Certificate) ca).getSubjectDN());
-            }
-            finally {
-                caInput.close();
-            }
         trustedKeyStore.setCertificateEntry("ca", ca);
 
         // Create a TrustManager that trusts the CAs in our KeyStore
@@ -280,7 +274,8 @@ public class LightningWebClient extends WebViewClient {
                         X509TrustManager x509TrustManager = (X509TrustManager)trustManager;
                         try{
                             x509TrustManager.checkServerTrusted(chain, "generic");
-                            passVerify = true;break;
+                            passVerify = true;
+                            break;
                         }catch(Exception e){
                             Log.e(TAG, "SslError verify trustManager failed", e);
                             passVerify = false;
@@ -292,11 +287,24 @@ public class LightningWebClient extends WebViewClient {
                 Log.e(TAG, "SslError verify cert fail", e);
             }
         }
+
         if(passVerify == true) {
             handler.proceed();
             return;
         }
 
+        if(error.getPrimaryError() == SslError.SSL_IDMISMATCH){
+            // Due to strange bug in android when trust anchors used, we must revalidate that hostname in request and in certificate is not matching.
+            SslCertificate cert = error.getCertificate();
+            String TargetURL = error.getUrl();
+            String reqHost = Utils.getDomainName(TargetURL, true);
+            String subjCN  = cert.getIssuedTo().getCName();
+            if(reqHost.equals(subjCN)){
+                handler.proceed();
+                return;
+            }
+        }
+
         List<Integer> errorCodeMessageCodes = getAllSslErrorMessageCodes(error);
 
         StringBuilder stringBuilder = new StringBuilder();

app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="@raw/purplei2p" />
+            <certificates src="system" />
+            <certificates src="user" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>

build.gradle

@@ -22,5 +22,5 @@ ext {
     buildToolsVersion = '28.0.3'
 
     versionName = '0.1.2'
-    versionCode = 125
+    versionCode = 126
 }