PKIX path building failed and unable to find valid certification path to requested target

Question

I m trying to get tweets using twitter4j library for my java project which uses under the covers java net HttpURLConnection  as can be seen in stack trace   On my first run I got an error about certificate sun security validator ValidatorException and sun security provider certpath SunCertPathBuilderException  Then I added twitter certificate by  C  Program Files Java jdk1 7 0 45 jre lib security gt keytool -importcert -trustcacerts -file PathToCert -alias ca alias -keystore  quot C  Program Files Java jdk1 7 0 45 jre lib security cacerts quot   But without success  Here is the procedure to get tweets  public static void main String   args  throws TwitterException       ConfigurationBuilder cb   new ConfigurationBuilder        cb setDebugEnabled true           setOAuthConsumerKey  quot myConsumerKey quot            setOAuthConsumerSecret  quot myConsumerSecret quot            setOAuthAccessToken  quot myAccessToken quot            setOAuthAccessTokenSecret  quot myAccessTokenSecret quot             TwitterFactory tf   new TwitterFactory cb build         Twitter twitter   tf getInstance             try           Query query   new Query  quot iphone quot            QueryResult result          result   twitter search query           System out println  quot Total amount of tweets   quot    result getTweets   size             List lt Status gt  tweets   result getTweets                     for  Status tweet   tweets                System out println  quot   quot    tweet getUser   getScreenName      quot     quot    tweet getText                     catch  TwitterException te            te printStackTrace            System out println  quot Failed to search tweets   quot    te getMessage            And here is the error  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target Relevant discussions can be found on the Internet at      http   www google co jp search q d35baff5 or     http   www google co jp search q 1446302e TwitterException exceptionCode  d35baff5-1446302e 43208640-747fd158 43208640-747fd158 43208640-747fd158   statusCode -1  message null  code -1  retryAfter -1  rateLimitStatus null  version 3 0 5      at twitter4j internal http HttpClientImpl request HttpClientImpl java 177      at twitter4j internal http HttpClientWrapper request HttpClientWrapper java 61      at twitter4j internal http HttpClientWrapper get HttpClientWrapper java 81      at twitter4j TwitterImpl get TwitterImpl java 1929      at twitter4j TwitterImpl search TwitterImpl java 306      at jku cc servlets TweetsAnalyzer main TweetsAnalyzer java 38  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 Unknown Source      at sun security ssl SSLSocketImpl fatal Unknown Source      at sun security ssl Handshaker fatalSE Unknown Source      at sun security ssl Handshaker fatalSE Unknown Source      at sun security ssl ClientHandshaker serverCertificate Unknown Source      at sun security ssl ClientHandshaker processMessage Unknown Source      at sun security ssl Handshaker processLoop Unknown Source      at sun security ssl Handshaker process record Unknown Source      at sun security ssl SSLSocketImpl readRecord Unknown Source      at sun security ssl SSLSocketImpl performInitialHandshake Unknown Source      at sun security ssl SSLSocketImpl startHandshake Unknown Source      at sun security ssl SSLSocketImpl startHandshake Unknown Source      at sun net www protocol https HttpsClient afterConnect Unknown Source      at sun net www protocol https AbstractDelegateHttpsURLConnection connect Unknown Source      at sun net www protocol http HttpURLConnection getInputStream Unknown Source      at java net HttpURLConnection getResponseCode Unknown Source      at sun net www protocol https HttpsURLConnectionImpl getResponseCode Unknown Source      at twitter4j internal http HttpResponseImpl  lt init gt  HttpResponseImpl java 34      at twitter4j internal http HttpClientImpl request HttpClientImpl java 141          5 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 Unknown Source      at sun security validator PKIXValidator engineValidate Unknown Source      at sun security validator Validator validate Unknown Source      at sun security ssl X509TrustManagerImpl validate Unknown Source      at sun security ssl X509TrustManagerImpl checkTrusted Unknown Source      at sun security ssl X509TrustManagerImpl checkServerTrusted Unknown Source          20 more Caused by  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target     at sun security provider certpath SunCertPathBuilder engineBuild Unknown Source      at java security cert CertPathBuilder build Unknown Source          26 more Failed to search tweets  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target

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Issue Background    I was getting following error when i try to run mvn clean install in my project and through Netbeans IDE clean and build option  This issue is due to certificate not available when we download through NET beans IDE through command prompt  but able to download the files through the browser    Error   Caused by  org eclipse aether transfer ArtifactTransferException  Could not transfer artifact com java project product jar 1 0 32 from to repo-local  https   url local-repo   sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target     Resolution   1  Download the certificate of the Url in question    Launch IE by  run as adminstrator   otherwise  we will not be able to download the certificate  Enter the url in IE-  https   url local-repo  In my case this url had a untrusted certificate   Download the certificate by clicking on Certificate error -  view certificate Select Details tab -  copy to file -  next -  select  DER encoded binary X 509   CER   save the certificate in some location  example   c  user sheldon desktop product cer   Congrats  you have successfully downloaded the certificate for the site   2  Now install the key store to fix the issue    Run the keytool command to append the downloaded keystore into the    existing certificate file  Command   Below command in the bin folder of jdk  JAVA HOME          C  Program Files Java jdk1 8 0 141 jre bin keytool -importcert -file    C  user sheldon desktop product cer  -alias product -keystore    C  Program Files Java jdk1 8 0 141 jre lib security cacerts      You will be prompted to enter password   Enter keystore password  enter  changeit  again for  Trust this certificate   no     enter   yes    Sample command line commands output   keytool -importcert -file  C  Users sheldon Desktop product cer  -alias product -keystore  C  Program iles Java jdk1 8 0 141 jre lib security cacerts  Enter keystore password  Trust this certificate   no    yes Certificate was added to keystore    Contgrats  now you should have got rid of  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  error in your Netbeans IDE

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Here normally this kind of exception occurs when there is mismatch in the PATH of trusted certificate  Check the configuration or path where this server certificate is required for secured communication

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I was facing the same issue  i was using 8 1 0-3  but later i used 9 2 1-0 and the issue was fixed without any manual steps  The self-signed certificate worked fine

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I had a slightly different situation  when both JDK and JRE 1 8 0 112 were present on my system    I imported the new CA certificates into  JDK FOLDER  jre lib security cacerts using the already known command   keytool -import -trustcacerts -keystore cacerts -alias  lt new ca alias gt  -file  lt path to ca cert file gt    Still  I kept getting the same PKIX path building failed error    I added debug information to the java CLI  by using java -Djavax net debug all      gt  debug log  In the debug log file  the line that begins with trustStore is  actually pointed to the cacerts store found in  JRE FOLDER  lib security cacerts    In my case the solution was to copy the cacerts file used by JDK  which had the new CAs added  over the one used by the JRE and that fixed the issue

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i have the same problem on ubuntu 15 10  Please try download plugin locally e g  https   github com lmenezes elasticsearch-kopf archive master zip and install with this command   sudo  usr share elasticsearch bin plugin install file  home dev Downloads elasticsearch-kopf-master zip   Path maybe different depending on your environment    Regards

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I was facing the same issue and get it resolved using the below simple steps   1  Download the InstallCert java from google  2  Compile it using javac InstallCert java  3  Run InstallCert java using java InstallCert java  with the hostname and https port  and press    1    when asking for input  It will add the    localhost    as a trusted keystore  and generate a file named    jssecacerts    as below   java InstallCert localhost 443  4  copy the jssecacerts into  JAVA HOME jre lib security folder  Main source to resolve the issue here is   https   ankurjain26 blogspot in 2017 11 javaxnetsslsslhandshakeexception html

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-Dmaven wagon http ssl insecure true -Dmaven wagon http ssl allowall true   It is used for jump the certificate validation   Warning Only use for development purposes for this is unsecure

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If you are seeing this issue in a linux container when java application is trying to communicate with another application site  it is because the certificate have been imported incorrectly into the load balancer  There is sequence of steps to be followed for importing certificates and that if not done correctly  you will see issues like   Caused by  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid  certification path to requested target   Once the certs are imported correctly  it should be done  No need to tinker with any JDK certs

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If your repository URL also work on HTTP and the security is not a concern  you can go to settings xml  often  but not always  located in  USERPROFILE   m2  and replace HTTPS with HTTP for  lt repository gt  and  lt pluginRepository gt  URLs   For example  this    lt repository gt       lt snapshots gt           lt enabled gt false lt  enabled gt       lt  snapshots gt       lt id gt central lt  id gt       lt name gt libs-release lt  name gt       lt url gt https    lt artifactory gt  libs-release lt  url gt   lt  repository gt    should be replaced by this    lt repository gt       lt snapshots gt           lt enabled gt false lt  enabled gt       lt  snapshots gt       lt id gt central lt  id gt       lt name gt libs-release lt  name gt       lt url gt https    lt artifactory gt  libs-release lt  url gt   lt  repository gt

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I came across this question while trying to install the Cucumber-Eclipse plugin in Eclipse via their update site   I received the same SunCertPathBuilderException error   Unable to read repository at http   cucumber io cucumber-eclipse update-site content xml      Unable to read repository at http   cucumber io cucumber-eclipse update-site content xml      sun security validator ValidatorException  PKIX path building failed      sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target   While some of the other answers are appropriate and helpful for this question s given situation  they were nevertheless unhelpful and misleading for my issue    In my case  the issue was that the URL provided for their update site is      https   cucumber io cucumber-eclipse update-site   However when navigating to it via a browser  it redirected to  note the added   github        http   cucumber github io cucumber-eclipse update-site    So the resolution is to simply use the redirected version of the update site URL when adding the update site in eclipse

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Problem is  your eclipse is not able to connect the site which actually it is trying to  I have faced similar issue and below given solution worked for me   Turn off any third party internet security application e g  Zscaler Sometimes also need to disconnect VPN if you are connected   Thanks

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I ran into same issue but updating wrong jre on my linux machine  It is highly likely that tomcat is using different jre and your cli prompt is configured to use a different jre  Make sure you are picking up the correct jre  Step  1  ps -ef   grep tomcat  You will see some thing like  root     29855     1  3 17 54 pts 3    00 00 42  usr java jdk1 7 0 79 jre bin java   Now use this  keytool -import -alias example -keystore   usr java jdk1 7 0 79 jre lib security cacerts -file cert cer PWD  changeit    cer file can be geneated as shown below   or you can use your own  openssl x509 -in cert pem -outform pem -outform der -out cert cer

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This isn t a Twitter-specific answer  but this is the question that comes up when you search for this error  If your system is receiving this error when connecting to a website that appears to have a valid certificate when viewed in a web browser  that probably means that website has an incomplete certificate chain    For a brief summary of the problem  Certificate Authorities don t use their Root Certificate to sign just any old certificate  Instead  they  usually  sign intermediate certificates that also have the Certificate Authority flag set  that is  are allowed to sign certificates   Then when you purchase a certificate from a CA  they sign your CSR with one of these intermediate certificates   Your Java trust store most likely only has the Root Cert  not the intermediate ones    A misconfigured site might return just their signed cert  Problem  it was signed with an intermediate cert that s not in your trust store  Browsers will handle this problem by downloading or using a cached intermediate certificate  this maximizes website compatibility  Java and tools like OpenSSL  however  won t  And that will cause the error in the question   You can verify this suspicion by using the Qualys SSL Test  If you run that against a site and it says     This server s certificate chain is incomplete    then that confirms it  You can also see this by looking at the certification paths and seeing the text Extra Download   How to fix it  the server administrator needs to configure the web server to return the intermediate certificates as well  For Comodo  for example  this is where the  ca-bundle file comes in handy  For example  in an Apache configuration with mod ssl  you d use the SSLCertificateChainFile configuration setting  For nginx  you need to concatenate the intermediate certificates and the signed certificate and use that in the SSL cert configuration  You can find more by searching for  incomplete certificate chain  online

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This is a solution but in form of my story with this problem   I was almost dead trying all the solution given above for 3 days   and nothing worked for me   I lost all hope   I contacted my security team regarding this because i was behind a proxy and they told that they had recently updated their security policy   I scolded them badly for not informing the Developers   Later they issued a new  cacerts  file which contains all the certificates   I removed the cacerts file which is present inside  JAVA HOME  jre lib security and it solved my problem   So if you are facing this issue it might be from your network team also like this

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1  Check the certificate  Try to load the target URL in browser and view the site s certificate  usually it s accessible by the icon with the lock sign  It s on the left or right side of the browser s address bar  whether it s expired or untrusted by other reason   2  Install latest versions of JRE and JDK  New versions usually come with the updated set of the trusted certificates   Also if it s possible  uninstall old versions  This will make misconfiguration errors explicit   3  Check your configuration    Check where your JAVA HOME environment variable points to  Check which java version you use to run the program  In IntelliJ check    File -  Project Structure    -  Project Settings -  Project -  Project SDK  File -  Project Structure    -  Platform Settings -  SDKs    4  Copy whole keystore from the new Java version  If you develop under the JDK other than the latest available - try to replace the  JAVA HOME  jre lib security cacerts file with the new one from the latest installed JRE  make a backup copy first  as  jeremy-goodell suggests in his answer  5  Add certificate s  to your keystore  If nothing above solves your problem use keytool to save certificate s  to the Java s keystore   keytool -trustcacerts -keystore   JAVA HOME jre lib security cacerts  -storepass changeit -importcert -alias  lt alias name gt  -file  lt path to crt file gt    File with the certificate can be obtained from the browser as  MagGGG suggests in his answer   Note 1  you may need to repeat this for every certificate in the chain to you site s certificate  Start from the root one   Note 2   lt alias name gt  should be unique among the keys in the store or keytool will show an error   To get list of all the certificates in the store you may run   keytool -list -trustcacerts -keystore   JAVA HOME jre lib security cacerts  -storepass changeit   In case something goes wrong this will help you to remove certificate from the store   keytool -delete -alias  lt alias name gt  -keystore   JAVA HOME jre lib security cacerts  -storepass changeit

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MY UI approach    Download keystore explorer from here  Open  JAVA HOME jre lib security cacerts enter PW  changeit  Can be changeme on Mac  Import your  crt file   CMD-Line    keytool -importcert -file jetty crt -alias jetty -keystore  JAVA HOME jre lib security cacerts enter PW  changeit  Can be changeme on Mac

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For me  certificate error popped up because I had fiddler running in background and that messes up with certificate  It acts as a proxy so close that and restart eclipse

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The reason  we get above error is that JDK is bundled with a lot of trusted Certificate Authority CA  certificates into a file called    cacerts    but this file has no clue of our self-signed certificate  In other words  the cacerts file doesn   t have our self-signed certificate imported and thus doesn   t treat it as a trusted entity and hence it gives the above error   How to fix the above error  To fix the above error  all we need is to import the self-signed certificate into the cacerts file   First  locate the cacerts file  We will need to find out the JDK location  If you are running your application through one of the IDE   s like Eclipse or IntelliJ Idea go to project settings and figure out what is the JDK location  For e g on a Mac OS typical location of cacerts file would be at this location  Library Java JavaVirtualMachines    JDK version   Contents Home jre lib security on a Window   s machine it would be under   Installation directory     JDK version   jre lib security  Once you have located the cacerts file  now we need to import our self-signed certificate to this cacerts file  Check the last article  if you don   t know how to generate the self-signed certificate correctly   If you don   t have a certificate file  crt  and just have a  jks file you can generate a  crt file by using below command  In case you already have a  crt  pem file then you can ignore below command    To generate certificate from keystore  jks file        keytool -export -keystore keystore jks -alias selfsigned -file selfsigned crt   Above step will generate a file called selfsigned crt Now Import the certificate to cacerts  Now add the certificate to JRE lib security cacerts  trustore   keytool -importcert -file selfsigned crt -alias selfsigned -keystore   cacerts path     for e g  keytool -importcert -file selfsigned nextgen crt -alias selfsigned nextgen -keystore  Library Java JavaVirtualMachines jdk1 8 0 171 jdk Contents Home jre lib security cacerts   That   s all  restart your application and it should work fine  If it still doesn   t work and get an SSL handshake exception  It probably means you are using different domain then registered in the certificate   The Link with detailed explanation and  step by step resolution is over here

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After many hours trying to build cert files to get my Java 6 installation working with the new twitter cert s  I finally stumbled onto an incredibly simple solution buried in a comment in one of the message boards  Just copy the cacerts file from a Java 7 installation and overwrite the one in your Java 6 installation  Probably best to make a backup of the cacerts file first  but then you just copy the new one in and BOOM  it just works   Note that I actually copied a Windows cacerts file onto a Linux installation and it worked just fine   The file is located in jre lib security cacerts in both the old and new Java jdk installations   Hope this saves someone else hours of aggravation

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goals    use https connections verify SSL chains do not deal with cacerts add certificate in runtime do not lose certificates from cacerts   How to do it    define own keystore put certificate into keystore redefine SSL default context with our custom class     profit   My Keystore wrapper file   public class CertificateManager        private final static Logger logger   Logger getLogger CertificateManager class        private String keyStoreLocation      private String keyStorePassword      private X509TrustManager myTrustManager      private static KeyStore myTrustStore       public CertificateManager String keyStoreLocation  String keyStorePassword  throws Exception           this keyStoreLocation   keyStoreLocation          this keyStorePassword   keyStorePassword          myTrustStore   createKeyStore keyStoreLocation  keyStorePassword              public void addCustomCertificate String certFileName  String certificateAlias              throws Exception           TrustManagerFactory tmf   TrustManagerFactory getInstance TrustManagerFactory getDefaultAlgorithm             tmf init  KeyStore  null           Certificate certificate   myTrustStore getCertificate certificateAlias           if  certificate    null                logger info  Certificate not exists                addCertificate certFileName  certificateAlias             else               logger info  Certificate exists                      tmf   TrustManagerFactory getInstance TrustManagerFactory getDefaultAlgorithm             tmf init myTrustStore           for  TrustManager tm   tmf getTrustManagers                  if  tm instanceof X509TrustManager                    setMytrustManager  X509TrustManager  tm                   logger info  Trust manager found                    break                                     private InputStream fullStream String fname  throws IOException           ClassLoader classLoader   getClass   getClassLoader            InputStream resource   classLoader getResourceAsStream fname           try               if  resource    null                    DataInputStream dis   new DataInputStream resource                   byte   bytes   new byte dis available                     dis readFully bytes                   return new ByteArrayInputStream bytes                 else                   logger info  resource not found                            catch  Exception e                logger error  exception in certificate fetching as resource   e                     return null             public static KeyStore createKeyStore String keystore  String pass  throws Exception           try               InputStream in   CertificateManager class getClass   getResourceAsStream keystore               KeyStore keyStore   KeyStore getInstance KeyStore getDefaultType                 keyStore load in  pass toCharArray                 logger info  Keystore was created from resource file                return keyStore            catch  Exception e                logger info  Fail to create keystore from resource file                       File file   new File keystore           KeyStore keyStore   KeyStore getInstance  JKS            if  file exists                  keyStore load new FileInputStream file   pass toCharArray                 logger info  Default keystore loaded              else               keyStore load null  null               keyStore store new FileOutputStream file   pass toCharArray                 logger info  New keystore created                      return keyStore             private void addCertificate String certFileName  String certificateAlias  throws CertificateException              IOException  KeyStoreException  NoSuchAlgorithmException           CertificateFactory cf   CertificateFactory getInstance  X 509            InputStream certStream   fullStream certFileName           Certificate certs   cf generateCertificate certStream           myTrustStore setCertificateEntry certificateAlias  certs           FileOutputStream out   new FileOutputStream getKeyStoreLocation             myTrustStore store out  getKeyStorePassword   toCharArray             out close            logger info  Certificate pushed               public String getKeyStoreLocation             return keyStoreLocation             public String getKeyStorePassword             return keyStorePassword            public X509TrustManager getMytrustManager             return myTrustManager            public void setMytrustManager X509TrustManager myTrustManager            this myTrustManager   myTrustManager            This class will create keystore if necessary  and will be able to manage certificates inside of it  Now class for SSL context   public class CustomTrustManager implements X509TrustManager        private final static Logger logger   Logger getLogger CertificateManager class        private static SSLSocketFactory socketFactory      private static CustomTrustManager instance   new CustomTrustManager        private static List lt CertificateManager gt  register   new ArrayList lt  gt          public static CustomTrustManager getInstance             return instance             private X509TrustManager defaultTm       public void register CertificateManager certificateManager            for CertificateManager manager   register                if manager    certificateManager                    logger info  Certificate manager already registered                    return                                  register add certificateManager           logger info  New Certificate manager registered               private CustomTrustManager             try               String algorithm   TrustManagerFactory getDefaultAlgorithm                TrustManagerFactory tmf   TrustManagerFactory getInstance algorithm                tmf init  KeyStore  null               boolean found   false              for  TrustManager tm   tmf getTrustManagers                      if  tm instanceof X509TrustManager                        defaultTm    X509TrustManager  tm                      found   true                      break                                              if found                    logger info  Default trust manager found                  else                   logger warn  Default trust manager was not found                               SSLContext sslContext   SSLContext getInstance  TLS                sslContext init null  new TrustManager   this   null               SSLContext setDefault sslContext               socketFactory   sslContext getSocketFactory                HttpsURLConnection setDefaultSSLSocketFactory socketFactory                 logger info  Custom trust manager was set              catch  NoSuchAlgorithmException   KeyManagementException   KeyStoreException e                logger warn  Custom trust manager can t be set                e printStackTrace                          Override     public X509Certificate   getAcceptedIssuers             List lt X509Certificate gt  out   new ArrayList lt  gt             if  defaultTm    null                out addAll Arrays asList defaultTm getAcceptedIssuers                        int defaultCount   out size            logger info  Default trust manager contain     defaultCount     certficates            for CertificateManager manager   register                X509TrustManager customTrustManager   manager getMytrustManager                X509Certificate   issuers   customTrustManager getAcceptedIssuers                out addAll Arrays asList issuers                      logger info  Custom trust managers contain      out size   - defaultCount      certficates            X509Certificate   arrayOut   new X509Certificate out size             return out toArray arrayOut               Override     public void checkServerTrusted X509Certificate   chain                                     String authType  throws CertificateException           for CertificateManager certificateManager   register                X509TrustManager customTrustManager   certificateManager getMytrustManager                try                   customTrustManager checkServerTrusted chain  authType                   logger info  Certificate chain  server  was aproved by custom trust manager                    return                catch  Exception e                                    if  defaultTm    null                defaultTm checkServerTrusted chain  authType               logger info  Certificate chain  server  was aproved by default trust manager              else               logger info  Certificate chain  server  was rejected                throw new CertificateException  Can t check server trusted certificate                           Override     public void checkClientTrusted X509Certificate   chain                                     String authType  throws CertificateException           try               if  defaultTm    null                    defaultTm checkClientTrusted chain  authType                   logger info  Certificate chain  client  was aproved by default trust manager                  else                   throw new NullPointerException                            catch  Exception e                for CertificateManager certificateManager   register                    X509TrustManager customTrustManager   certificateManager getMytrustManager                    try                       customTrustManager checkClientTrusted chain  authType                       logger info  Certificate chain  client  was aproved by custom trust manager                        return                    catch  Exception e1                                                logger info  Certificate chain  client  was rejected                throw new CertificateException  Can t check client trusted certificate                          public SSLSocketFactory getSocketFactory             return socketFactory            This class made as singleton  because only one defaultSSL context allowed  So  now usage               CertificateManager certificateManager   new CertificateManager  C   myapplication  mykeystore jks    changeit                String certificatePath    C   myapplication  public key for your ssl service crt               try                   certificateManager addCustomCertificate certificatePath   alias for public key for your ssl service                  catch  Exception e                    log error  Can t add custom certificate                    e printStackTrace                              CustomTrustManager getInstance   register certificateManager     Possibly  it will not work with this settings  because I keep certificate file inside of resource folder  so my path is not absolute  But generally  it work perfectly

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I was using my own trust store rather than JRE one by passing arg -Djavax net ssl trustStore   I was getting this error regardless of certs in truststore  The issue for me was the ordering of of the properties passed on arg line   When i put -Djavax net ssl trustStore  amp  -Djavax net ssl trustStorePassword  before -Dspring config location   amp  -jar args i was able to successfully invoke my rest call over https

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download the cert file  and update the keystore with the certificate file as in the below command   sudo keytool -importcert -alias    aws2    -file   Desktop  aws crt -keystore   Library java JavaVirtualMachines jdk1 8 0 131 jdk Contents Home jre lib security cacerts

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It s addition to the answer https   stackoverflow com a 36427118 1491414  Thanks  MagGGG   Please make sure you have administrator permission Please use double quotes for the keystore path  -keystore  C  Program Files  x86  Java jre1 6 0 22 lib security cacerts   because in Windows OS the default installs location will be Program Files and you will get an error because of space between Program Files

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You ll get this error when the certificate is newer than your Java version  Using a newer Java version will solve this

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In case your host sits behind firewall proxy   use following command in cmd   keytool -J-Dhttps proxyHost  lt proxy hostname gt  -J-Dhttps proxyPort  lt proxy port gt  -printcert -rfc -sslserver  lt remote host name remote ssl port gt    Replace  lt proxy hostname gt  and  lt proxy port gt  with the HTTP proxy server that is configured  Replace  lt remote host name remote ssl port gt  with one of the remote host  basically url  and port having the certification problem   Take the last certificate content printed and copy it  also copy begin and end certificate   Paste it in text file and give  crt  extension to it   Now import this certificate to cacerts using java keytool command and it should work    keytool -importcert -file  lt filename gt  crt -alias randomaliasname -keystore  JAVA HOME  jre lib security cacerts -storepass changeit

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If you re using CloudFoundry and run into certificate issue then you d have to make sure that you push the jar again with the keystore-service with the certificate in it  Simply unbind  bind and restart won t work

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I solved this issue on Windows Server 2016 with Java 8  by importing cert from pkcs12 store to cacerts keystore   Path to pkcs12 store    C  Apps pkcs12 pfx  Path to Java cacerts   C  Program Files Java jre1 8 0 151 lib security cacerts  Path to keytool   C  Program Files Java jre1 8 0 151 bin  After possitioning to folder with keytool in command prompt  as administrator   command to import cert from pkcs12 to cacerts is as follows   keytool -v -importkeystore -srckeystore C  Apps pkcs12 pfx -srcstoretype PKCS12 -destkeystore  C  Program Files Java jre1 8 0 151 lib security cacerts  -deststoretype JKS  You will be prompted to   1  enter destination keystore password  cacerts pasword  default is  changeit    2  enter source keystore password  pkcs12 password    For changes to take effect  restart server machine  or just restart JVM

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Try copying java cacerts   cp  usr lib jvm java-1 8 0-openjdk-1 8 0 172-9 b11 fc28 x86 64 jre lib security cacerts  JAVA HOME jre lib security cacerts

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I wanted to import certificate for smtp gmail com  Only solution worked for me is 1  Enter command to view this certificate     D  openssl bin openssl exe s client -connect smtp gmail com 465    Copy and save the lines between  -----BEGIN CERTIFICATE-----  and  -----END CERTIFICATE-----  into a file  gmail cer Run     keytool -import -alias smtp gmail com -keystore     JAVA HOME  jre lib security cacerts  -file   C  Users Admin Desktop gmail cer  Enter password chageit Click yes to import the certificate  Restart java   now run the command and you are good to go

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Adding cacerts did not work for me  After enabling log with flag -Djavax net debug all  then came to know java reading from jssecacerts   Import to jssecacerts worked finally

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Go to URL in your browser    firefox -  click on HTTPS certificate chain  the lock icon right next to URL address   Click  quot more info quot   gt   quot security quot   gt   quot show certificate quot   gt   quot details quot   gt   quot export   quot   Pickup the name and choose file type example cer chrome - click on site icon left to address in address bar  select  quot Certificate quot  - gt   quot Details quot  - gt   quot Export quot  and save in format  quot Der-encoded binary  single certificate quot     Now you have file with keystore and you have to add it to your JVM  Determine location of cacerts files  eg  C  Program Files  x86  Java jre1 6 0 22 lib security cacerts    Next import the example cer file into cacerts in command line  may need administrator command prompt     keytool -import -alias example -keystore   quot C  Program Files  x86  Java jre1 6 0 22 lib security cacerts quot  -file example cer You will be asked for password which default is changeit Restart your JVM PC  source  http   magicmonster com kb prg java ssl pkix path building failed html

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I have stumbled upon this issue which took many hours of research to fix  specially with auto-generated certificates  which unlike Official ones  are quite tricky and Java does not like them that much   Please check the following link  Solve Problem with certificates in Java  Basically you have to add the certificate from the server to the Java Home certs     Generate or Get your certificate and configure Tomcat to use it in Servers xml Download the Java source code of the class InstallCert and execute it while the server is running  providing the following arguments server  port   No password is needed  as the original password works for the Java certs   changeit    The Program will connect to the server and Java will throw an exception  it will analyze the certificate provided by the server and allow you to create a jssecerts file inside the directory where you executed the Program  If executed from Eclipse then make sure you configure the Work directory in Run - gt  Configurations   Manually copy that file to  JAVA HOME jre lib security   After following these steps  the connections with the certificate will not generate exceptions anymore within Java   The following source code is important and it disappeared from  Sun  Oracle blogs  the only page I found it was on the link provided  therefore I am attaching it in the answer for any reference         Copyright 2006 Sun Microsystems  Inc   All Rights Reserved        Redistribution and use in source and binary forms  with or without    modification  are permitted provided that the following conditions    are met          - Redistributions of source code must retain the above copyright        notice  this list of conditions and the following disclaimer          - Redistributions in binary form must reproduce the above copyright        notice  this list of conditions and the following disclaimer in the        documentation and or other materials provided with the distribution          - Neither the name of Sun Microsystems nor the names of its        contributors may be used to endorse or promote products derived        from this software without specific prior written permission        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  AS    IS  AND ANY EXPRESS OR IMPLIED WARRANTIES  INCLUDING  BUT NOT LIMITED TO     THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR    PURPOSE ARE DISCLAIMED   IN NO EVENT SHALL THE COPYRIGHT OWNER OR    CONTRIBUTORS BE LIABLE FOR ANY DIRECT  INDIRECT  INCIDENTAL  SPECIAL     EXEMPLARY  OR CONSEQUENTIAL DAMAGES  INCLUDING  BUT NOT LIMITED TO     PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES  LOSS OF USE  DATA  OR    PROFITS  OR BUSINESS INTERRUPTION  HOWEVER CAUSED AND ON ANY THEORY OF    LIABILITY  WHETHER IN CONTRACT  STRICT LIABILITY  OR TORT  INCLUDING    NEGLIGENCE OR OTHERWISE  ARISING IN ANY WAY OUT OF THE USE OF THIS    SOFTWARE  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE             Originally from     http   blogs sun com andreas resource InstallCert java    Use     java InstallCert hostname    Example      java InstallCert ecc fedora redhat com      import javax net ssl    import java io    import java security KeyStore  import java security MessageDigest  import java security cert CertificateException  import java security cert X509Certificate          Class used to add the server s certificate to the KeyStore    with your trusted certificates      public class InstallCert        public static void main String   args  throws Exception           String host          int port          char   passphrase          if   args length    1      args length    2                 String   c   args 0  split                   host   c 0               port    c length    1    443   Integer parseInt c 1                String p    args length    1     changeit    args 1               passphrase   p toCharArray              else               System out println  Usage  java InstallCert   port   passphrase                 return                     File file   new File  jssecacerts            if  file isFile      false                char SEP   File separatorChar              File dir   new File System getProperty  java home     SEP                        lib    SEP    security                file   new File dir   jssecacerts                if  file isFile      false                    file   new File dir   cacerts                                    System out println  Loading KeyStore     file                   InputStream in   new FileInputStream file           KeyStore ks   KeyStore getInstance KeyStore getDefaultType             ks load in  passphrase           in close             SSLContext context   SSLContext getInstance  TLS            TrustManagerFactory tmf                   TrustManagerFactory getInstance TrustManagerFactory getDefaultAlgorithm             tmf init ks           X509TrustManager defaultTrustManager    X509TrustManager  tmf getTrustManagers   0           SavingTrustManager tm   new SavingTrustManager defaultTrustManager           context init null  new TrustManager   tm   null           SSLSocketFactory factory   context getSocketFactory             System out println  Opening connection to     host         port                   SSLSocket socket    SSLSocket  factory createSocket host  port           socket setSoTimeout 10000           try               System out println  Starting SSL handshake                   socket startHandshake                socket close                System out println                System out println  No errors  certificate is already trusted              catch  SSLException e                System out println                e printStackTrace System out                      X509Certificate   chain   tm chain          if  chain    null                System out println  Could not obtain server certificate chain                return                     BufferedReader reader                   new BufferedReader new InputStreamReader System in             System out println            System out println  Server sent     chain length     certificate s              System out println            MessageDigest sha1   MessageDigest getInstance  SHA1            MessageDigest md5   MessageDigest getInstance  MD5            for  int i   0  i  lt  chain length  i                  X509Certificate cert   chain i               System out println                             i   1      Subject     cert getSubjectDN                 System out println     Issuer      cert getIssuerDN                 sha1 update cert getEncoded                 System out println     sha1        toHexString sha1 digest                  md5 update cert getEncoded                 System out println     md5         toHexString md5 digest                  System out println                       System out println  Enter certificate to add to trusted keystore or  q  to quit   1             String line   reader readLine   trim            int k          try               k    line length      0    0   Integer parseInt line  - 1            catch  NumberFormatException e                System out println  KeyStore not changed                return                     X509Certificate cert   chain k           String alias   host    -     k   1           ks setCertificateEntry alias  cert            OutputStream out   new FileOutputStream  jssecacerts            ks store out  passphrase           out close             System out println            System out println cert           System out println            System out println                   Added certificate to keystore  jssecacerts  using alias                              alias                    private static final char   HEXDIGITS    0123456789abcdef  toCharArray         private static String toHexString byte   bytes            StringBuilder sb   new StringBuilder bytes length   3           for  int b   bytes                b  amp   0xff              sb append HEXDIGITS b  gt  gt  4                sb append HEXDIGITS b  amp  15                sb append                         return sb toString               private static class SavingTrustManager implements X509TrustManager            private final X509TrustManager tm          private X509Certificate   chain           SavingTrustManager X509TrustManager tm                this tm   tm                     public X509Certificate   getAcceptedIssuers                 throw new UnsupportedOperationException                       public void checkClientTrusted X509Certificate   chain  String authType                  throws CertificateException               throw new UnsupportedOperationException                       public void checkServerTrusted X509Certificate   chain  String authType                  throws CertificateException               this chain   chain              tm checkServerTrusted chain  authType

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After struggling for half-day  found one more way to solve this problem  I was able to solve this in MAC 10 15 5   Catalina   Followed the below steps   This problem occurs when we are running behind a company proxy   In my case its Zscaler  Open Key chain access  export CA certificate  Select CA certificate  File- gt export items and save with the desired name  Copy the path of existing cacerts from java folder  Library Java JavaVirtualMachines jdk1 8 0 251 jdk Contents Home jre lib security cacerts   Open terminal and navigate to the Keytool folder   Library Java JavaVirtualMachines jdk1 8 0 251 jdk Contents Home jre bin   Run the below command  Keytool -importcert - file  Path to exported cert from the keychainaccess  -alias  give a name  -keystore  Path of existing cacerts from java folder  sudo Keytool -importcert -file  Users Desktop RootCA cer -alias demo -keystore  Library Java JavaVirtualMachines jdk1 8 0 251 jdk Contents Home jre lib security cacerts It will ask for password   give it as   changeit It asks for confirmation   Say   yes  After all of these steps  Quit eclipse and terminal start fresh session

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I fixed this using below method-   Copy url which is having connecting issue Go to Android Studio- Settings- Http settings In  Test Connection   paste that url and press ok On Ok click  Android Studio will ask to import certificate of that url  import it That s it  Nothing else to be done and my issue was gone  No need to restart studio as well

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I solved it for Intellij Idea I facing this problem  Althouh   I change a lot of place to resolve problem I found a solution for me  Right click your project  You will see Maven  after that press Generate Sources And Update Folders and ReImport   It is done

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1-First of all  import you r crt file into  JAVA HOME  jre security cacerts  if you still faced with this exception  change you r jdk version  For example from jdk1 8 0 17 to jdk1 8 0 231

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When you have above error with atlassian software ex  jira  2018-08-18 11 35 00 312 Caesium-1-4 WARN anonymous    Default Mail Handler  c a mail incoming mailfetcherservice  Default Mail Handler 10001   javax mail MessagingException  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid certification path to requested target while connecting to host  imap xyz pl  as user  jira xyz pl  via protocol  imaps  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   you can add certs to it s trusted keystore  change missing ca to proper cert name    keytool -importcert -file missing ca crt -alias missing ca -keystore  opt atlassian jira jre lib security cacerts   If asked for password put changeit and confirm y  After that simply restart jira

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If you are still getting this error Caused by  sun security validator ValidatorException  PKIX path building failed  sun security provider certpath SunCertPathBuilderException  unable to find valid  certification path to requested target  after executing the below command keytool -import -alias certificatealias -keystore C  Program Files Java jre1 8 0 151 lib security cacerts -file certificate crt  Then there is some issue in JDK  Try to install JDK from a trusted provider  Once you reinstalled it from trusted provider you won t face this issue

[java] "PKIX path building failed" and "unable to find valid certification path to requested target"

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