How to create a BKS BouncyCastle format Java Keystore that contains a client certificate chain

Question

I m writing an Android app that requires SSL client authentication  I know how to create a JKS keystore for a desktop Java application  but Android only supports the BKS format  Every way I ve tried to create the keystore results in the following error  handling exception  javax net ssl SSLHandshakeException  null cert chain  So it looks like the client is never sending a proper certificate chain  probably because I m not creating the keystore properly  I m unable to enable SSL debugging like I can on the desktop  so that s making this much more difficult than it should be   For reference the following is the command that IS working to create a BKS truststore  keytool -importcert -v -trustcacerts -file  cacert pem  -alias ca -keystore  mySrvTruststore bks  -provider org bouncycastle jce provider BouncyCastleProvider -providerpath  bcprov-jdk16-145 jar  -storetype BKS -storepass testtest    Here is the command I ve tried that is NOT working to create a BKS client keystore   cat clientkey pem clientcert pem cacert pem  gt  client pem  keytool -import -v -file  lt  openssl x509 -in client pem  -alias client -keystore  clientkeystore  -provider org bouncycastle jce provider BouncyCastleProvider -providerpath  bcprov-jdk16-145 jar  -storetype BKS -storepass testtest

User · Answer

Not sure you resolved this issue or not  but this is how I do it and it works on Android    Use openssl to merge client s cert cert must be signed by a CA that accepted by server  and private key into a PCKS12 format key pair  openssl pkcs12 -export -in clientcert pem -inkey clientkey pem -out client p12 You may need patch your JRE to umlimited strength encryption depends on your key strength  copy the jar files fromJCE 5 0 unlimited strength Jurisdiction Policy FIles and override those in your JRE  eg C  Program Files Java jre6 lib security  Use Portecle tool mentioned above and create a new keystore with BKS format Import PCKS12 key pair generated in step 1 and save it as BKS keystore  This keystore works with Android client authentication  If you need to do certificate chain  you can use this IBM tool KeyMan to merge client s PCKS12 key pair with CA cert  But it only generate JKS keystore  so you again need Protecle to convert it to BKS format

User · Answer

Use this manual http   blog antoine li 2010 10 22 android-trusting-ssl-certificates  This guide really helped me  It is important to observe a sequence of certificates in the store  For example  import the lowermost Intermediate CA certificate first and then all the way up to the Root CA certificate

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Detailed Step by Step instructions I followed to achieve this   Download bouncycastle JAR from          http   repo2 maven org maven2 org bouncycastle bcprov-ext-jdk15on 1 46 bcprov-ext-jdk15on-1 46 jar or take it from the  doc  folder  Configure BouncyCastle for PC using one of the below methods   Adding the BC Provider Statically  Recommended   Copy the bcprov-ext-jdk15on-1 46 jar to each  D  tools jdk1 5 0 09 jre lib ext    JDK  bundled JRE  D  tools jre1 5 0 09 lib ext        JRE  C                                   location to be used in env variable   Modify the java security file under  D  tools jdk1 5 0 09 jre lib security D  tools jre1 5 0 09 lib security and add the following entry  security provider 7 org bouncycastle jce provider BouncyCastleProvider   Add the following environment variable in  User Variables  section  CLASSPATH  CLASSPATH  c  bcprov-ext-jdk15on-1 46 jar   Add bcprov-ext-jdk15on-1 46 jar to CLASSPATH of your project and Add the following line in your code  Security addProvider new BouncyCastleProvider       Generate the Keystore using Bouncy Castle  Run the following command  keytool -genkey -alias myproject -keystore C  myproject keystore -storepass myproject -storetype BKS -provider org bouncycastle jce provider BouncyCastleProvider  This generates the file C  myproject keystore Run the following command to check if it is properly generated or not  keytool -list -keystore C  myproject keystore -storetype BKS   Configure BouncyCastle for TOMCAT   Open D  tools apache-tomcat-6 0 35 conf server xml and add the following entry    lt Connector port  8443  keystorePass  myproject  alias  myproject  keystore  c  myproject keystore  keystoreType  BKS  SSLEnabled  true  clientAuth  false  protocol  HTTP 1 1  scheme  https  secure  true  sslProtocol  TLS  sslImplementationName  org bouncycastle jce provider BouncyCastleProvider   gt   Restart the server after these changes   Configure BouncyCastle for Android Client  No need to configure since Android supports Bouncy Castle Version 1 46 internally in the provided  android jar   Just implement your version of HTTP Client  MyHttpClient java can be found below  and set the following in code  SSLSocketFactory setHostnameVerifier SSLSocketFactory ALLOW ALL HOSTNAME VERIFIER    If you don t do this  it gives an exception as below  javax net ssl SSLException  hostname in certificate didn t match   lt 192 168 104 66       In production mode  change the above code to   SSLSocketFactory setHostnameVerifier SSLSocketFactory STRICT HOSTNAME VERIFIER       MyHttpClient java  package com arisglobal aglite network   import java io InputStream  import java security KeyStore   import org apache http conn ClientConnectionManager  import org apache http conn scheme PlainSocketFactory  import org apache http conn scheme Scheme  import org apache http conn scheme SchemeRegistry  import org apache http conn ssl SSLSocketFactory  import org apache http impl client DefaultHttpClient  import org apache http impl conn SingleClientConnManager   import com arisglobal aglite activity R   import android content Context   public class MyHttpClient extends DefaultHttpClient        final Context context       public MyHttpClient Context context            this context   context              Override     protected ClientConnectionManager createClientConnectionManager             SchemeRegistry registry   new SchemeRegistry             registry register new Scheme  http   PlainSocketFactory getSocketFactory    80                Register for port 443 our SSLSocketFactory with our keystore to the ConnectionManager         registry register new Scheme  https   newSslSocketFactory    443            return new SingleClientConnManager getParams    registry              private SSLSocketFactory newSslSocketFactory             try                  Get an instance of the Bouncy Castle KeyStore format             KeyStore trusted   KeyStore getInstance  BKS                    Get the raw resource  which contains the keystore with your trusted certificates  root and any intermediate certs              InputStream in   context getResources   openRawResource R raw aglite               try                      Initialize the keystore with the provided trusted certificates                     Also provide the password of the keystore                 trusted load in   aglite  toCharArray                   finally                   in close                                  Pass the keystore to the SSLSocketFactory  The factory is responsible for the verification of the server certificate              SSLSocketFactory sf   new SSLSocketFactory trusted                   Hostname verification from certificate                http   hc apache org httpcomponents-client-ga tutorial html connmgmt html d4e506             sf setHostnameVerifier SSLSocketFactory ALLOW ALL HOSTNAME VERIFIER               return sf            catch  Exception e                throw new AssertionError e                       How to invoke the above code in your Activity class   DefaultHttpClient client   new MyHttpClient getApplicationContext     HttpResponse response   client execute

User · Answer

command line   keytool -genseckey -alias aliasName -keystore truststore bks -providerclass org bouncycastle jce provider BouncyCastleProvider -providerpath  path to jar bcprov-jdk16-1 46 jar -storetype BKS

User · Answer

I don t think your problem is with the BouncyCastle keystore  I think the problem is with a broken javax net ssl package in Android   The BouncyCastle keystore is a supreme annoyance because Android changed a default Java behavior without documenting it anywhere -- and removed the default provider -- but it does work   Note that for SSL authentication you may require 2 keystores   The  TrustManager  keystore  which contains the CA certs  and the  KeyManager  keystore  which contains your client-site public private keys    The documentation is somewhat vague on what needs to be in the KeyManager keystore    In theory  you shouldn t need the TrustManager keystore if all of your certficates are signed by  well-known  Certifcate Authorities  e g   Verisign  Thawte  and so on   Let me know how that works for you   Your server will also require the CA for whatever was used to sign your client   I could not create an SSL connection using javax net ssl at all   I disabled the client SSL authentication on the server side  and I still could not create the connection   Since my end goal was an HTTPS GET  I punted and tried using the Apache HTTP Client that s bundled with Android   That sort-of worked   I could make the HTTPS conection  but I still could not use SSL auth   If I enabled the client SSL authentication on my server  the connection would fail   I haven t checked the Apache HTTP Client code  but I suspect they are using their own SSL implementation  and don t use javax net ssl

User · Answer

I use Portecle  and it works like a charm

User · Answer

Your command for creating the BKS keystore looks correct for me   How do you initialize the keystore   You need to craeate and pass your own SSLSocketFactory  Here is an example which uses Apache s org apache http conn ssl SSLSocketFactory  But I think you can do pretty the same on the javax net ssl SSLSocketFactory      private SSLSocketFactory newSslSocketFactory         try              Get an instance of the Bouncy Castle KeyStore format         KeyStore trusted   KeyStore getInstance  BKS               Get the raw resource  which contains the keystore with            your trusted certificates  root and any intermediate certs          InputStream in   context getResources   openRawResource R raw mykeystore           try                  Initialize the keystore with the provided trusted certificates                Also provide the password of the keystore             trusted load in   testtest  toCharArray               finally               in close                         Pass the keystore to the SSLSocketFactory  The factory is responsible            for the verification of the server certificate          SSLSocketFactory sf   new SSLSocketFactory trusted              Hostname verification from certificate            http   hc apache org httpcomponents-client-ga tutorial html connmgmt html d4e506         sf setHostnameVerifier SSLSocketFactory STRICT HOSTNAME VERIFIER           return sf        catch  Exception e            throw new AssertionError e             Please let me know if it worked

[java] How to create a BKS (BouncyCastle) format Java Keystore that contains a client certificate chain

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