Converting an SSH2 key to SSH public key format - AWS Transfer Family
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Converting an SSH2 key to SSH public key format

AWS Transfer Family only accepts SSH-formatted public keys. If you have an SSH2 public key, you need to convert it. An SSH2 public key has the following format:

---- BEGIN SSH2 PUBLIC KEY ----
Comment: "rsa-key-20160402"
AAAAB3NzaC1yc2EAAAABJQAAAgEAiL0jjDdFqK/kYThqKt7THrjABTPWvXmB3URI
:
:
---- END SSH2 PUBLIC KEY ----

An SSH public key has the following format:

ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAA...

Run the following command to convert an SSH2-formatted public key into an SSH-formatted public key. Replace ssh2-key with the name of your SSH2 key, and ssh-key with the name of your SSH key.

ssh-keygen -i -f ssh2-key.pub > ssh-key.pub