How to disable SSL certificate checking with Spring RestTemplate

Question

I am trying to write an integration test where our test launches an embedded HTTPS server using Simple  I created a self-signed certificate using keytool and am able to access the server using a browser  specifically Chrome  and I do get a warning about the self-signed certificate    However  when I try to connect using Spring RestTemplate  I get a ResourceAccessException    org springframework web client ResourceAccessException  I O error on GET request for  https   localhost 8088  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target  nested exception is javax net ssl SSLHandshakeException  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target     at org springframework web client RestTemplate doExecute RestTemplate java 557      at org springframework web client RestTemplate execute RestTemplate java 502      at org springframework web client RestTemplate exchange RestTemplate java 444      at net initech DummySslServer shouldConnect DummySslServer java 119      at sun reflect NativeMethodAccessorImpl invoke0 Native Method      at sun reflect NativeMethodAccessorImpl invoke NativeMethodAccessorImpl java 62      at sun reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43      at org junit runners model FrameworkMethod 1 runReflectiveCall FrameworkMethod java 47      at org junit internal runners model ReflectiveCallable run ReflectiveCallable java 12      at org junit runners model FrameworkMethod invokeExplosively FrameworkMethod java 44      at org junit internal runners statements InvokeMethod evaluate InvokeMethod java 17      at org junit internal runners statements RunBefores evaluate RunBefores java 26      at org junit internal runners statements RunAfters evaluate RunAfters java 27      at org junit runners ParentRunner runLeaf ParentRunner java 271      at org junit runners BlockJUnit4ClassRunner runChild BlockJUnit4ClassRunner java 70      at org junit runners BlockJUnit4ClassRunner runChild BlockJUnit4ClassRunner java 50      at org junit runners ParentRunner 3 run ParentRunner java 238      at org junit runners ParentRunner 1 schedule ParentRunner java 63      at org junit runners ParentRunner runChildren ParentRunner java 236      at org junit runners ParentRunner access 000 ParentRunner java 53      at org junit runners ParentRunner 2 evaluate ParentRunner java 229      at org junit internal runners statements RunBefores evaluate RunBefores java 26      at org junit internal runners statements RunAfters evaluate RunAfters java 27      at org junit runners ParentRunner run ParentRunner java 309      at org junit runner JUnitCore run JUnitCore java 160      at com intellij junit4 JUnit4IdeaTestRunner startRunnerWithArgs JUnit4IdeaTestRunner java 74      at com intellij rt execution junit JUnitStarter prepareStreamsAndStart JUnitStarter java 211      at com intellij rt execution junit JUnitStarter main JUnitStarter java 67      at sun reflect NativeMethodAccessorImpl invoke0 Native Method      at sun reflect NativeMethodAccessorImpl invoke NativeMethodAccessorImpl java 62      at com intellij rt execution application AppMain main AppMain java 134  Caused by  javax net ssl SSLHandshakeException  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target     at sun security ssl Alerts getSSLException Alerts java 192      at sun security ssl SSLSocketImpl fatal SSLSocketImpl java 1917      at sun security ssl Handshaker fatalSE Handshaker java 301      at sun security ssl Handshaker fatalSE Handshaker java 295      at sun security ssl ClientHandshaker serverCertificate ClientHandshaker java 1369      at sun security ssl ClientHandshaker processMessage ClientHandshaker java 156      at sun security ssl Handshaker processLoop Handshaker java 925      at sun security ssl Handshaker process record Handshaker java 860      at sun security ssl SSLSocketImpl readRecord SSLSocketImpl java 1043      at sun security ssl SSLSocketImpl performInitialHandshake SSLSocketImpl java 1343      at sun security ssl SSLSocketImpl startHandshake SSLSocketImpl java 1371      at sun security ssl SSLSocketImpl startHandshake SSLSocketImpl java 1355      at sun net www protocol https HttpsClient afterConnect HttpsClient java 563      at sun net www protocol https AbstractDelegateHttpsURLConnection connect AbstractDelegateHttpsURLConnection java 185      at sun net www protocol https HttpsURLConnectionImpl connect HttpsURLConnectionImpl java 153      at org springframework http client SimpleBufferingClientHttpRequest executeInternal SimpleBufferingClientHttpRequest java 78      at org springframework http client AbstractBufferingClientHttpRequest executeInternal AbstractBufferingClientHttpRequest java 48      at org springframework http client AbstractClientHttpRequest execute AbstractClientHttpRequest java 52      at org springframework web client RestTemplate doExecute RestTemplate java 541          33 more Caused by  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target     at sun security validator PKIXValidator doBuild PKIXValidator java 387      at sun security validator PKIXValidator engineValidate PKIXValidator java 292      at sun security validator Validator validate Validator java 260      at sun security ssl X509TrustManagerImpl validate X509TrustManagerImpl java 324      at sun security ssl X509TrustManagerImpl checkTrusted X509TrustManagerImpl java 229      at sun security ssl X509TrustManagerImpl checkServerTrusted X509TrustManagerImpl java 124      at sun security ssl ClientHandshaker serverCertificate ClientHandshaker java 1351          47 more Caused by  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target     at sun security provider certpath SunCertPathBuilder build SunCertPathBuilder java 145      at sun security provider certpath SunCertPathBuilder engineBuild SunCertPathBuilder java 131      at java security cert CertPathBuilder build CertPathBuilder java 280      at sun security validator PKIXValidator doBuild PKIXValidator java 382          53 more   From other questions and blog posts I ve seen the advice to replace the HostnameVerifier with something like   private static final HostnameVerifier PROMISCUOUS VERIFIER     s  sslSession   - gt  true    And I ve set it both globally and on the RestTemplate itself   HttpsURLConnection setDefaultHostnameVerifier  PROMISCUOUS VERIFIER         and on the RestTemplate itself   final RestTemplate restTemplate   new RestTemplate    restTemplate setRequestFactory  new SimpleClientHttpRequestFactory          Override     protected void prepareConnection HttpURLConnection connection  String httpMethod  throws IOException           if connection instanceof HttpsURLConnection                  HttpsURLConnection  connection  setHostnameVerifier PROMISCUOUS VERIFIER                     super prepareConnection connection  httpMethod               Yet  I am still getting the above error  How can I get around it     Installing the certificate locally outside of the unit test is not an option as then it would need to get installed manually on every dev machine and build server and would cause an avalanche of red tape  We need SSL since we are testing a library that sits on top of RestTemplate and that we are configuring it correctly    I am using Java 8  but could use 7  and Spring 4 0 3

User · Answer

Here s a solution where security checking is disabled  for example  conversing with the localhost   Also  some of the solutions I ve seen now contain deprecated methods and such           param configFilePath     param ipAddress     param userId     param password     throws MalformedURLException     public Upgrade String aConfigFilePath  String ipAddress  String userId  String password        configFilePath   aConfigFilePath      baseUri    https       ipAddress         PORT             restTemplate   new RestTemplate createSecureTransport userId  password  ipAddress  PORT        restTemplate getMessageConverters   add new MappingJacksonHttpMessageConverter         restTemplate getMessageConverters   add new StringHttpMessageConverter         ClientHttpRequestFactory createSecureTransport String username          String password  String host  int port        HostnameVerifier nullHostnameVerifier   new HostnameVerifier             public boolean verify String hostname  SSLSession session                return true                       UsernamePasswordCredentials credentials   new UsernamePasswordCredentials username  password       CredentialsProvider credentialsProvider   new BasicCredentialsProvider        credentialsProvider setCredentials              new AuthScope AuthScope ANY HOST  AuthScope ANY PORT  AuthScope ANY REALM   credentials        HttpClient client   HttpClientBuilder create                setSSLHostnameVerifier nullHostnameVerifier               setSSLContext createContext                 setDefaultCredentialsProvider credentialsProvider  build         HttpComponentsClientHttpRequestFactory requestFactory                new HttpComponentsClientHttpRequestFactory client        return requestFactory     private SSLContext createContext         TrustManager   trustAllCerts   new TrustManager     new X509TrustManager             public java security cert X509Certificate   getAcceptedIssuers                 return null                     public void checkClientTrusted                  java security cert X509Certificate   certs  String authType                       public void checkServerTrusted                  java security cert X509Certificate   certs  String authType                            try           SSLContext sc   SSLContext getInstance  SSL            sc init null  trustAllCerts  null           SSLContext setDefault sc           HttpsURLConnection setDefaultSSLSocketFactory sc getSocketFactory             HttpsURLConnection setDefaultHostnameVerifier new HostnameVerifier                 public boolean verify String hostname  SSLSession session                        return true                                            return sc         catch  Exception e              return null

User · Answer

Disabling certificate checking is the wrong solution  and radically insecure   The correct solution is to import the self-signed certificate into your truststore  An even more correct solution is to get the certificate signed by a CA   If this is  only for testing  it is still necessary to test the production configuration  Testing something else isn t a test at all  it s just a waste of time

User · Answer

Please see below for a modest improvement on  Sled s code shown above  that turn-back-on method was missing one line  now it passes my tests   This disables HTTPS certificate and hostname spoofing when using RestTemplate in a Spring-Boot version 2 application that uses the default HTTP configuration  NOT configured to use Apache HTTP Client   package org my little spring-boot-v2 app   import java security KeyManagementException  import java security NoSuchAlgorithmException  import java security cert X509Certificate   import javax net ssl HostnameVerifier  import javax net ssl HttpsURLConnection  import javax net ssl SSLContext  import javax net ssl SSLSession  import javax net ssl TrustManager  import javax net ssl X509TrustManager          Disables and enables certificate and host-name checking in    HttpsURLConnection  the default JVM implementation of the HTTPS TLS protocol     Has no effect on implementations such as Apache Http Client  Ok Http     public final class SSLUtils        private static final HostnameVerifier jvmHostnameVerifier   HttpsURLConnection getDefaultHostnameVerifier         private static final HostnameVerifier trivialHostnameVerifier   new HostnameVerifier             public boolean verify String hostname  SSLSession sslSession                return true                        private static final TrustManager   UNQUESTIONING TRUST MANAGER   new TrustManager     new X509TrustManager             public java security cert X509Certificate   getAcceptedIssuers                 return null                     public void checkClientTrusted X509Certificate   certs  String authType                       public void checkServerTrusted X509Certificate   certs  String authType                            public static void turnOffSslChecking   throws NoSuchAlgorithmException  KeyManagementException           HttpsURLConnection setDefaultHostnameVerifier trivialHostnameVerifier              Install the all-trusting trust manager         SSLContext sc   SSLContext getInstance  SSL            sc init null  UNQUESTIONING TRUST MANAGER  null           HttpsURLConnection setDefaultSSLSocketFactory sc getSocketFactory                public static void turnOnSslChecking   throws KeyManagementException  NoSuchAlgorithmException           HttpsURLConnection setDefaultHostnameVerifier jvmHostnameVerifier              Return it to the initial state  discovered by reflection  now hardcoded          SSLContext sc   SSLContext getInstance  SSL            sc init null  null  null           HttpsURLConnection setDefaultSSLSocketFactory sc getSocketFactory                private SSLUtils             throw new UnsupportedOperationException  Do not instantiate libraries

User · Answer

Bean name    restTemplateByPassSSL   public RestTemplate restTemplateByPassSSL           throws KeyStoreException  NoSuchAlgorithmException  KeyManagementException       TrustStrategy acceptingTrustStrategy    X509Certificate   chain  String authType  - gt  true      HostnameVerifier hostnameVerifier    s  sslSession  - gt  true      SSLContext sslContext   SSLContexts custom   loadTrustMaterial null  acceptingTrustStrategy  build        SSLConnectionSocketFactory csf   new SSLConnectionSocketFactory sslContext  hostnameVerifier       CloseableHttpClient httpClient   HttpClients custom   setSSLSocketFactory csf  build        HttpComponentsClientHttpRequestFactory requestFactory   new HttpComponentsClientHttpRequestFactory        requestFactory setHttpClient httpClient        return new RestTemplate requestFactory

User · Answer

You can also register your keystore    private void registerKeyStore String keyStoreName        try           ClassLoader classLoader   this getClass   getClassLoader            InputStream keyStoreInputStream   classLoader getResourceAsStream keyStoreName           if  keyStoreInputStream    null                throw new FileNotFoundException  Could not find file named      keyStoreName      in the CLASSPATH                         load the keystore         KeyStore keystore   KeyStore getInstance KeyStore getDefaultType             keystore load keyStoreInputStream  null              add to known keystore          TrustManagerFactory trustManagerFactory   TrustManagerFactory getInstance TrustManagerFactory getDefaultAlgorithm             trustManagerFactory init keystore              default SSL connections are initialized with the keystore above         TrustManager   trustManagers   trustManagerFactory getTrustManagers            SSLContext sc   SSLContext getInstance  SSL            sc init null  trustManagers  null           SSLContext setDefault sc         catch  IOException   GeneralSecurityException e            throw new RuntimeException e

User · Answer

Iknow It is too old to answer  but I couldn t find solution like this   The code that worked for me with the jersey client   import org glassfish jersey client ClientConfig  import org glassfish jersey client ClientProperties   import javax net ssl    import javax ws rs client Client  import javax ws rs client ClientBuilder  import javax ws rs client Entity  import javax ws rs client WebTarget  import javax ws rs core Form  import javax ws rs core MediaType  import javax ws rs core MultivaluedHashMap  import java security KeyManagementException  import java security NoSuchAlgorithmException  import java security cert CertificateException   public class Testi    static       disableSslVerification      private static void disableSslVerification            Create all-trusting host name verifier     HostnameVerifier allHostsValid   new HostnameVerifier             public boolean verify String hostname  SSLSession session                return true                          Install the all-trusting host verifier     HttpsURLConnection setDefaultHostnameVerifier allHostsValid      public Testi         MultivaluedHashMap lt String  Object gt  headers   new MultivaluedHashMap lt  gt               initialize headers      Form form   new Form        Entity lt Form gt  entity   Entity entity form  MediaType APPLICATION FORM URLENCODED TYPE          initialize entity          WebTarget target   getWebTarget        Object responseResult   target path  api test path      request                headers headers  post entity  Object class       public static void main String args          new Testi       private WebTarget getWebTarget         ClientConfig clientConfig   new ClientConfig        clientConfig property ClientProperties CONNECT TIMEOUT  30000       clientConfig property ClientProperties READ TIMEOUT  30000        SSLContext sc   getSSLContext        Client client   ClientBuilder newBuilder   sslContext sc  withConfig clientConfig  build        WebTarget target   client target     url           return target     private SSLContext getSSLContext         try              Create a trust manager that does not validate certificate chains         TrustManager   trustAllCerts   new TrustManager   new X509TrustManager                  Override             public void checkClientTrusted java security cert X509Certificate   x509Certificates  String s  throws CertificateException                                Override             public void checkServerTrusted java security cert X509Certificate   x509Certificates  String s  throws CertificateException                               public java security cert X509Certificate   getAcceptedIssuers                     return null                                                 Install the all-trusting trust manager         SSLContext sc   SSLContext getInstance  SSL            sc init null  trustAllCerts  new java security SecureRandom             return sc        catch  NoSuchAlgorithmException   KeyManagementException e            e printStackTrace              return null

User · Answer

I wish I still had a link to the source that lead me in this direction  but this is the code that ended up working for me  By looking over the JavaDoc for X509TrustManager it looks like the way the TrustManagers work is by returning nothing on successful validation  otherwise throwing an exception  Thus  with a null implementation  it is treated as a successful validation  Then you remove all other implementations   import javax net ssl    import java security    import java security cert X509Certificate   public final class SSLUtil       private static final TrustManager   UNQUESTIONING TRUST MANAGER   new TrustManager                new X509TrustManager                     public java security cert X509Certificate   getAcceptedIssuers                        return null                                    public void checkClientTrusted  X509Certificate   certs  String authType                     public void checkServerTrusted  X509Certificate   certs  String authType                                   public  static void turnOffSslChecking   throws NoSuchAlgorithmException  KeyManagementException              Install the all-trusting trust manager         final SSLContext sc   SSLContext getInstance  SSL            sc init  null  UNQUESTIONING TRUST MANAGER  null            HttpsURLConnection setDefaultSSLSocketFactory sc getSocketFactory                public static void turnOnSslChecking   throws KeyManagementException  NoSuchAlgorithmException              Return it to the initial state  discovered by reflection  now hardcoded          SSLContext getInstance  SSL   init  null  null  null               private SSLUtil            throw new UnsupportedOperationException   Do not instantiate libraries

User · Answer

For the sake of other developers who finds this question and need another solution that fits not only for unit-tests   I ve found this on a blog  not my solution  Credit to the blog s owner    TrustStrategy acceptingTrustStrategy    X509Certificate   chain  String authType  - gt  true   SSLContext sslContext   org apache http ssl SSLContexts custom            loadTrustMaterial null  acceptingTrustStrategy           build     SSLConnectionSocketFactory csf   new SSLConnectionSocketFactory sslContext    CloseableHttpClient httpClient   HttpClients custom            setSSLSocketFactory csf           build     HttpComponentsClientHttpRequestFactory requestFactory           new HttpComponentsClientHttpRequestFactory     requestFactory setHttpClient httpClient    RestTemplate restTemplate   new RestTemplate requestFactory

User · Answer

In my case  with letsencrypt https  this was caused by using cert pem instead of fullchain pem as the certificate file on the requested server  See this thread for details

[java] How to disable SSL certificate checking with Spring RestTemplate?

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