Add OpenSSH public key export format support

[AngelNicolas0]

Feature Request

Summary

Please add support for exporting public keys in OpenSSH format (ssh-rsa, ssh-ed25519, etc.).

Problem

Currently, the available export formats are PEM, DER, DER (Base64), and JWK. While these formats are useful for certificates, PKI, and web applications, many SSH/SFTP services require public keys in OpenSSH format.

For example, AWS Transfer Family only accepts public keys in formats such as:

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQ...

and does not accept PEM-encoded public keys like:

-----BEGIN PUBLIC KEY-----
...
-----END PUBLIC KEY-----

As a result, users must perform additional conversions using external tools such as OpenSSH or OpenSSL.

Proposed Solution

Add an export option for:

• OpenSSH Public Key
• Authorized Keys format

Examples:

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQ...

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAI...

Benefits

• Better interoperability with SSH and SFTP servers.
• Direct compatibility with services such as AWS Transfer Family.
• Eliminates the need for external key conversion tools.
• Improves the experience for system administrators and cloud engineers.

Thank you for considering this enhancement.