[JENKINS-68647] Jenkins Plugin ssh-agent could not ssh-add sucessfully a private key which is created as a jenkins credential ID

[jenkins-infra-bot]

1. Create public and private keys.
   ssh-keygen -t ed25519 -C mymail@​mail.com
   got 2 files: id_ed25519, id_ed25519.pub

1. Add id_ed25519.pub to SSH Keys of git. 
2. Create a credential ID.
   
3. Use it for our Job and we could not visit git. 
   
4.  As a hint, when we use git 2.36.1, it shows Permission denied (publickey). But when we use git 2.21.0, it shows invalid format for private key. 

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Originally reported by fiann, imported from: Jenkins Plugin ssh-agent could not ssh-add sucessfully a private key which is created as a jenkins credential ID

• assignee: dnusbaum
• status: Open
• priority: Critical
• component(s): ssh-agent-plugin
• label(s): SSH, ssh-agent
• resolution: Unresolved
• votes: 0
• watchers: 1
• imported: 20260604-211335

Raw content of original issue

	
Create public and private keys.
ssh-keygen -t ed25519 -C mymail@mail.com
got 2 files: id_ed25519, id_ed25519.pub





	
Add id_ed25519.pub to SSH Keys of git. 
	
Create a credential ID.

	
Use it for our Job and we could not visit git. 

	
 As a hint, when we use git 2.36.1, it shows Permission denied (publickey). But when we use git 2.21.0, it shows invalid format for private key. 

• environment: Slave is windows 10. Private Key is ed25519.

2 attachments

• image-2022-05-31-18-08-08-583.png

  

• image-2022-05-31-18-12-44-714.png

  

[HannesWell]

@ogulcanaydogan can this be considered solved with all the recent enhancements?