How to copy Jenkins secret files

Question

I have already added 2 secret files to Jenkins credentials with names PRIVATE-KEY and PUBLIC-KEY. How can I copy those 2 files to /src/resources directory inside a job?

I have the following snippet

withCredentials([file(credentialsId: 'PRIVATE_KEY', variable: 'my-private-key'),                  file(credentialsId: 'PUBLIC_KEY', variable: 'my-public-key')]) {    //how to copy, where are those files to copy from? } 

Answer 1

Ok, I think I managed to do it. my-private-key variable is a path to the secret, so I had to copy that secret to the destination I needed.

withCredentials([file(credentialsId: 'PRIVATE_KEY', variable: 'my-private-key'),                  file(credentialsId: 'PUBLIC_KEY', variable: 'my-public-key')]) {    sh "cp \$my-public-key /src/main/resources/my-public-key.der"    sh "cp \$my-private-key /src/main/resources/my-private-key.der" } 

Answer 2

Both solution is good for specific OS(win, unix). There are some basic function to check is system unix isUnix(). Instead of this you can use the read/write basic methods for any machine.

withCredentials([file(credentialsId: PRIVATE_KEY, variable: 'my_private_key'),                  file(credentialsId: PUBLIC_KEY, variable: 'my_public_key')]) {         writeFile file: 'key/private.pem', text: readFile(my_private_key)         writeFile file: 'key/public.pem', text: readFile(my_public_key)     }