Converting CFB to CBC using OpenSSL
I had the same problem with my SFTP server (Solarwinds Serv-U) generating CFB keys that cannot being understood by PuTTYgen.
Please refer to this page:
https://web.archive.org/web/20221210015643/https://parkwharf.com/blog/cipher-feedback-encryption-woes-on-windows/
With a simple command you can convert from CFB to CBC:
Note: change
Converted successfully with PuTTYgen 0.73
Please refer to this page:
https://web.archive.org/web/20221210015643/https://parkwharf.com/blog/cipher-feedback-encryption-woes-on-windows/
With a simple command you can convert from CFB to CBC:
openssl dsa -in my-useless-CFB.key -out hopefully-useful.key -outform pem
Note: change
dsa
by rsa
if your CFB key is using RSA
Converted successfully with PuTTYgen 0.73