Exception while adding ssh credentials to Jenkins programmatically - jenkins

Question

I have used a method mentioned here to add credential to Jenkins programmatically. It worked successfully for adding secret texts and secrets files. But it gives an exception while adding ssh private keys. Below is the curl command I used.
curl -X POST 'http://localhost:8080/jenkins/credentials/store/system/domain/_/createCredentials' \
--data-urlencode 'json={
"": "0",
"credentials": {
"scope": "GLOBAL",
"id": "temp",
"username": "temp",
"privateKeySource": {
"stapler-class": "com.cloudbees.jenkins.plugins.sshcredentials.impl.BasicSSHUserPrivateKey$FileOnMasterPrivateKeySource",
"privateKeyFile": "/home/udhan/private-key.pem",
},
"stapler-class": "com.cloudbees.jenkins.plugins.sshcredentials.impl.BasicSSHUserPrivateKey"
}
}'
Here is the exception I get.
A problem occurred while processing the request.
Please check our bug tracker to see if a similar problem has already been reported.
If it is already reported, please vote and put a comment on it to let us gauge the impact of the problem.
If you think this is a new issue, please file a new issue.
When you file an issue, make sure to add the entire stack trace, along with the version of Jenkins and relevant plugins.
The users list might be also useful in understanding what has happened.</p><h2>Stack trace</h2><pre style="margin:2em; clear:both">org.kohsuke.stapler.NoStaplerConstructorException: There's no #DataBoundConstructor on any constructor of class com.cloudbees.jenkins.plugins.sshcredentials.impl.BasicSSHUserPrivateKey$FileOnMasterPrivateKeySource
at org.kohsuke.stapler.ClassDescriptor.loadConstructorParamNames(ClassDescriptor.java:265)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:765)
at org.kohsuke.stapler.RequestImpl.access$200(RequestImpl.java:83)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:678)

Answer 1

I've just bumped into this same problem right now. Rather than using a pem file, I ended up putting the SSH pem's value into a variable and passed it that way instead.
CRUMB=$(curl -s 'https://{{jenkins_admin_username}}:{{jenkins_admin_password}}#localhost:8080/crumbIssuer/api/xml?xpath=concat(//crumbRequestField,":",//crumb)')
SSH_KEY="$(cat /your/ssh/pem)"
curl -H $CRUMB -X POST 'https://{{jenkins_admin_username}}:{{jenkins_admin_password}}#localhost:8080/credentials/store/system/domain/_/createCredentials' --data-urlencode 'json={
"": "0",
"credentials": {
"scope": "GLOBAL",
"id": "'test-jenkins-id'",
"username": "'test-username'",
"password": "",
"privateKeySource": {
"stapler-class": "com.cloudbees.jenkins.plugins.sshcredentials.impl.BasicSSHUserPrivateKey$DirectEntryPrivateKeySource",
"privateKey": "$SSH_KEY",
},
"description": "test-jenkins-ssh description",
"stapler-class": "com.cloudbees.jenkins.plugins.sshcredentials.impl.BasicSSHUserPrivateKey"
}
}'
Not that I went with https instead of http here as we're passing things that should be secured.
I hope this helps.