Import PEM into Java Key Store

Question

I am trying to connect to an SSL server which requires me to authenticate myself  In order to use SSL over Apache MINA I need a suitable JKS file  However  I have only been given a  PEM file    How would I go about creating a JKS file from a PEM file

User · Answer

I got it from internet  It works pretty good for pem files that contains multiple entries      bin bash pemToJks               number of certs in the PEM file         pemCerts  1         certPass  2         newCert   basename   pemCerts           newCert    newCert               newCert    newCert    JKS            echo  newCert  pemCerts  certPass         CERTS   grep  END CERTIFICATE   pemCerts  wc -l          echo  CERTS           For every cert in the PEM file  extract it and import into the JKS keystore           awk command  step 1  if line is in the desired cert  print the line                        step 2  increment counter when last line of cert is found         for N in   seq 0     CERTS - 1     do           ALIAS    pemCerts    - N            cat  pemCerts                   awk  n   N   print     END CERTIFICATE    n                         KEYTOOLCMD -noprompt -import -trustcacerts                                   -alias  ALIAS -keystore  newCert -storepass  certPass         done   pemToJks  lt pem to import gt   lt pass for new jks gt

User · Answer

If you only want to import a certificate in PEM format into a keystore  keytool will do the job   keytool -import -alias  alias  -keystore cacerts -file  cert pem

User · Answer

If you need an easy way to load PEM files in Java without having to deal with external tools  opensll  keytool   here is my code I use in production    import java io BufferedReader  import java io ByteArrayInputStream  import java io File  import java io FileReader  import java io IOException  import java security KeyFactory  import java security KeyStore  import java security KeyStoreException  import java security NoSuchAlgorithmException  import java security PrivateKey  import java security cert CertificateException  import java security cert CertificateFactory  import java security cert X509Certificate  import java security interfaces RSAPrivateKey  import java security spec InvalidKeySpecException  import java security spec PKCS8EncodedKeySpec  import java util ArrayList  import java util List   import javax net ssl KeyManager  import javax net ssl KeyManagerFactory  import javax net ssl SSLContext  import javax net ssl SSLServerSocketFactory  import javax xml bind DatatypeConverter   public class PEMImporter        public static SSLServerSocketFactory createSSLFactory File privateKeyPem  File certificatePem  String password  throws Exception           final SSLContext context   SSLContext getInstance  TLS            final KeyStore keystore   createKeyStore privateKeyPem  certificatePem  password           final KeyManagerFactory kmf   KeyManagerFactory getInstance  SunX509            kmf init keystore  password toCharArray             final KeyManager   km   kmf getKeyManagers            context init km  null  null           return context getServerSocketFactory                          Create a KeyStore from standard PEM files                 param privateKeyPem the private key PEM file         param certificatePem the certificate s  PEM file         param the password to set to protect the private key             public static KeyStore createKeyStore File privateKeyPem  File certificatePem  final String password              throws Exception  KeyStoreException  IOException  NoSuchAlgorithmException  CertificateException           final X509Certificate   cert   createCertificates certificatePem           final KeyStore keystore   KeyStore getInstance  JKS            keystore load null              Import private key         final PrivateKey key   createPrivateKey privateKeyPem           keystore setKeyEntry privateKeyPem getName    key  password toCharArray    cert           return keystore             private static PrivateKey createPrivateKey File privateKeyPem  throws Exception           final BufferedReader r   new BufferedReader new FileReader privateKeyPem            String s   r readLine            if  s    null     s contains  BEGIN PRIVATE KEY                  r close                throw new IllegalArgumentException  No PRIVATE KEY found                      final StringBuilder b   new StringBuilder            s               while  s    null                if  s contains  END PRIVATE KEY                      break                            b append s               s   r readLine                      r close            final String hexString   b toString            final byte   bytes   DatatypeConverter parseBase64Binary hexString           return generatePrivateKeyFromDER bytes              private static X509Certificate   createCertificates File certificatePem  throws Exception           final List lt X509Certificate gt  result   new ArrayList lt X509Certificate gt             final BufferedReader r   new BufferedReader new FileReader certificatePem            String s   r readLine            if  s    null     s contains  BEGIN CERTIFICATE                  r close                throw new IllegalArgumentException  No CERTIFICATE found                      StringBuilder b   new StringBuilder            while  s    null                if  s contains  END CERTIFICATE                      String hexString   b toString                    final byte   bytes   DatatypeConverter parseBase64Binary hexString                   X509Certificate cert   generateCertificateFromDER bytes                   result add cert                   b   new StringBuilder                  else                   if   s startsWith  ----                          b append s                                               s   r readLine                      r close             return result toArray new X509Certificate result size                 private static RSAPrivateKey generatePrivateKeyFromDER byte   keyBytes  throws InvalidKeySpecException  NoSuchAlgorithmException           final PKCS8EncodedKeySpec spec   new PKCS8EncodedKeySpec keyBytes           final KeyFactory factory   KeyFactory getInstance  RSA            return  RSAPrivateKey  factory generatePrivate spec              private static X509Certificate generateCertificateFromDER byte   certBytes  throws CertificateException           final CertificateFactory factory   CertificateFactory getInstance  X 509            return  X509Certificate  factory generateCertificate new ByteArrayInputStream certBytes               Have fun

User · Answer

I m always forgetting how to do this because it s something that I just do once in a while  this is one possible solution  and it just works    Go to your favourite browser and download the main certificate from the secured website  Execute the two following lines of code     openssl x509 -outform der -in GlobalSignRootCA crt -out GlobalSignRootCA der   keytool -import -alias GlobalSignRootCA -keystore GlobalSignRootCA jks -file GlobalSignRootCA der  If executing in Java SE environment add the following options     java -Djavax net ssl trustStore GlobalSignRootCA jks -Djavax net ssl trustStorePassword trustStorePassword -jar MyJar jar  Or add the following to the java code   System setProperty  javax net ssl trustStore    GlobalSignRootCA jks    System setProperty  javax net ssl trustStorePassword   trustStorePassword       The other option for step 2 is to just using the keytool command  Bellow is an example with a chain of certificates     keytool -import -file org eu crt -alias orgcrt -keystore globalsignrs jks   keytool -import -file GlobalSignOrganizationValidationCA-SHA256-G2 crt -alias globalsignorgvalca -keystore globalsignrs jks   keytool -import -file GlobalSignRootCA crt -alias globalsignrootca -keystore globalsignrs jks

User · Answer

I used Keystore Explorer   Open JKS with a private key Examine signed PEM from CA Import key Save JKS

User · Answer

There is also a GUI tool that allows visual JKS creation and certificates importing  http   portecle sourceforge net   Portecle is a user friendly GUI application for creating  managing and examining keystores  keys  certificates  certificate requests  certificate revocation lists and more

User · Answer

First  convert your certificate in a DER format    openssl x509 -outform der -in certificate pem -out certificate der   And after  import it in the keystore    keytool -import -alias your-alias -keystore cacerts -file certificate der

User · Answer

I ve developed http   code google com p java-keyutil  which imports PEM certificates straight into a Java keystore  Its primary purpose is to import a multi-part PEM Operating System certificate bundles such as ca-bundle crt  These often includes headers which keytool cannot handle   lt  self promotion gt

User · Answer

Although this question is pretty old and it has already a-lot answers  I think it is worth to provide an alternative  Using native java classes makes it very verbose to just use pem files and almost forces you wanting to convert the pem files into p12 or jks files as using p12 or jks files are much easier  I want to give anyone who wants an alternative for the already provided answers  GitHub - SSLContext Kickstart var keyManager   PemUtils loadIdentityMaterial  quot certificate-chain pem quot    quot private-key pem quot    var trustManager   PemUtils loadTrustMaterial  quot some-trusted-certificate pem quot     var sslFactory   SSLFactory builder              withIdentityMaterial keyManager             withTrustMaterial trustManager             build     var sslContext   sslFactory getSslContext     I need to provide some disclaimer here  I am the library maintainer

User · Answer

In my case I had a pem file which contained two certificates and an encrypted private key to be used in mutual SSL authentication  So my pem file looked like this   -----BEGIN CERTIFICATE-----       -----END CERTIFICATE-----  -----BEGIN RSA PRIVATE KEY-----  Proc-Type  4 ENCRYPTED  DEK-Info  DES-EDE3-CBC C8BF220FC76AA5F9       -----END RSA PRIVATE KEY-----  -----BEGIN CERTIFICATE-----       -----END CERTIFICATE-----   Here is what I did  Split the file into three separate files  so that each one contains just one entry   starting with ---BEGIN   and ending with ---END   lines  Lets assume we now have three files  cert1 pem  cert2 pem  and pkey pem   Convert pkey pem into DER format using openssl and the following syntax      openssl pkcs8 -topk8 -nocrypt -in pkey pem -inform PEM -out pkey der -outform DER   Note  that if the private key is encrypted you need to supply a password  obtain it from the supplier of the original pem file   to convert to DER format   openssl will ask you for the password like this   enter a passphrase for pkey pem      If conversion is successful  you will get a new file called pkey der   Create a new java keystore and import the private key and the certificates   String keypass    password       this is a new password  you need to come up with to protect your java key store file String defaultalias    importkey   KeyStore ks   KeyStore getInstance  JKS    SUN        this section does not make much sense to me      but I will leave it intact as this is how it was in the original example I found on internet     ks load  null  keypass toCharArray     ks store  new FileOutputStream    mykeystore      keypass toCharArray     ks load  new FileInputStream    mykeystore        keypass toCharArray        end of section        read the key file from disk and create a PrivateKey  FileInputStream fis   new FileInputStream  pkey der    DataInputStream dis   new DataInputStream fis   byte   bytes   new byte dis available     dis readFully bytes   ByteArrayInputStream bais   new ByteArrayInputStream bytes    byte   key   new byte bais available     KeyFactory kf   KeyFactory getInstance  RSA    bais read key  0  bais available     bais close     PKCS8EncodedKeySpec keysp   new PKCS8EncodedKeySpec   key    PrivateKey ff   kf generatePrivate  keysp        read the certificates from the files and load them into the key store   Collection  col crt1   CertificateFactory getInstance  X509   generateCertificates new FileInputStream  cert1 pem     Collection  col crt2   CertificateFactory getInstance  X509   generateCertificates new FileInputStream  cert2 pem      Certificate crt1    Certificate  col crt1 iterator   next    Certificate crt2    Certificate  col crt2 iterator   next    Certificate   chain   new Certificate     crt1  crt2     String alias1     X509Certificate  crt1  getSubjectX500Principal   getName    String alias2     X509Certificate  crt2  getSubjectX500Principal   getName     ks setCertificateEntry alias1  crt1   ks setCertificateEntry alias2  crt2       store the private key ks setKeyEntry defaultalias  ff  keypass toCharArray    chain        save the key store to a file          ks store new FileOutputStream    mykeystore    keypass toCharArray        optional  Verify the content of your new key store     keytool -list -keystore mykeystore -storepass password   Keystore type  JKS Keystore provider  SUN  Your keystore contains 3 entries    cn     ou     o     Sep 2  2014  trustedCertEntry  Certificate fingerprint  SHA1   2C B8      importkey  Sep 2  2014  PrivateKeyEntry  Certificate fingerprint  SHA1   9C B0      cn     o       Sep 2  2014  trustedCertEntry  Certificate fingerprint  SHA1   83 63         optional  Test your certificates and private key from your new key store against your SSL server    You may want to enable debugging as an VM option   -Djavax net debug all            char   passw    password  toCharArray            KeyStore ks   KeyStore getInstance  JKS    SUN            ks load new FileInputStream    mykeystore     passw             KeyManagerFactory kmf   KeyManagerFactory getInstance  SunX509            kmf init ks  passw            TrustManagerFactory tmf   TrustManagerFactory getInstance TrustManagerFactory getDefaultAlgorithm             tmf init ks           TrustManager   tm   tmf getTrustManagers             SSLContext sclx   SSLContext getInstance  TLS            sclx init  kmf getKeyManagers    tm  null            SSLSocketFactory factory   sclx getSocketFactory            SSLSocket socket    SSLSocket  factory createSocket   192 168 1 111   443            socket startHandshake               if no exceptions are thrown in the startHandshake method  then everything is fine     Finally register your certificates with    HttpsURLConnection if plan to use it           char   passw    password  toCharArray            KeyStore ks   KeyStore getInstance  JKS    SUN            ks load new FileInputStream    mykeystore     passw             KeyManagerFactory kmf   KeyManagerFactory getInstance  SunX509            kmf init ks  passw            TrustManagerFactory tmf   TrustManagerFactory getInstance TrustManagerFactory getDefaultAlgorithm             tmf init ks           TrustManager   tm   tmf getTrustManagers             SSLContext sclx   SSLContext getInstance  TLS            sclx init  kmf getKeyManagers    tm  null            HostnameVerifier hv   new HostnameVerifier                         public boolean verify String urlHostName  SSLSession session                                if   urlHostName equalsIgnoreCase session getPeerHost                                           System out println  Warning  URL host      urlHostName      is different to SSLSession host      session getPeerHost                                              return true                                    HttpsURLConnection setDefaultSSLSocketFactory  sclx getSocketFactory              HttpsURLConnection setDefaultHostnameVerifier hv

[java] Import PEM into Java Key Store

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