How to obtain the location of cacerts of the default java installation

Question

I am looking on how how to obtain the location of cacerts of the default java installation  when you do not have JAVA HOME or JRE HOME defined   I need a solution that works at least for OS X and Linux   Yes  java -v is assumed to work

User · Answer

As of OS X 10 10 1  Yosemite   the location of the cacerts file has been changed to     usr libexec java home  jre lib security cacerts

User · Answer

In MacOS Mojave  the location is    Library Java JavaVirtualMachines jdk1 8 0 192 jdk Contents Home jre lib security cacerts    If using sdkman to manage java versions  the cacerts is in     sdkman candidates java current jre lib security

User · Answer

If you need to access those certs programmatically it is best to not use the file at all  but access it via the trust manager  The following code is from a OpenJDK Test case  which makes sure the built cacerts collection is not empty    TrustManagerFactory trustManagerFactory       TrustManagerFactory getInstance  PKIX    trustManagerFactory init  KeyStore  null   TrustManager   trustManagers       trustManagerFactory getTrustManagers    X509TrustManager trustManager        X509TrustManager  trustManagers 0   X509Certificate   acceptedIssuers       trustManager getAcceptedIssuers      So you don   t have to deal with file location or keystore password

User · Answer

Under Linux  to find the location of  JAVA HOME  readlink -f  usr bin java   sed  quot s bin java   quot   the cacerts are under lib security cacerts    readlink -f  usr bin java   sed  quot s bin java   quot  lib security cacerts  Under mac OS X   to find  JAVA HOME run   usr libexec java home  the cacerts are under Home lib security cacerts     usr libexec java home  lib security cacerts  UPDATE  OS X with JDK  above code was tested on computer without JDK installed  With JDK installed  as pR0Ps said  it s at    usr libexec java home  jre lib security cacerts

User · Answer

You can also consult readlink -f  which java   However it might not work for all binary wrappers  It is most likely better to actually start a Java class

User · Answer

In High Sierra  the cacerts is located at    Library Java JavaVirtualMachines jdk1 8 0 25 jdk Contents Home jre lib security cacerts

[java] How to obtain the location of cacerts of the default java installation?

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