Key Support
Supported Key Types
Prompt currently supports keys of the following key types for both host key verification and client key exchange in both PEM and OpenSSH formats( where applicable):
- DSA
- ECDSA
- Ed25519
- RSA
FIDO2
Prompt 3 now supports client key exchange FIDO2 keys in the following formats:
- ECDSA-SK
- Ed25519-SK
Supported Exchange/Security Methods
KexAlgorithms
- diffie-hellman-group-exchange-sha1
- diffie-hellman-group14-sha1
- diffie-hellman-group1-sha1
- diffie-hellman-group-exchange-sha256
- ecdh-sha2-nistp256
- ecdh-sha2-nistp384
- ecdh-sha2-nistp521
Ciphers
- aes128-ctr
- aes192-ctr
- aes256-ctr
- aes128-cbc
- aes192-cbc
- aes256-cbc
- blowfish-cbc
- arcfour
- arcfour128
- cast128-cbc
- 3des-cbc
MACs
- sha2-512-etm@openssh.com
- sha2-512
- sha2-256-etm@openssh.com
- sha2-256
- sha1
- sha1 96
- ripemd160
Troubleshooting Key Import
-
To address issues importing your private key, make sure you are importing the private key, and that it is in a supported format listed above.
-
If Prompt detects a public key (ex.,
id_rsa.pub) or anything that doesn’t exactly match the format of supported private keys, it won’t offer to let you import from the clipboard. -
If you already have a PuTTY key (in the PPK format), you can convert it by following these instructions under “Dealing with Private Keys in Other Formats”, then import the resulting OpenSSH private key into Prompt.