The primary question is, does your provider just implement some of the existing algorithms that the OpenSSH supports or do you want to add a new cipher algorithm? If the second, then OpenSSH needs to be patched to add support for the new algorithm. I do not think it supports custom pluggable algorithms. Tomas Mraz, OpenSSL On Tue, 2023-01-03 at 03:46 +0000, Hareesh Das Ulleri wrote: > Dear OpenSSL users, > > I use Linux 5.10 + OpenSSL 3.0.7. I have a custom provider cipher > implementation and its algo implementation works for test > application. Now I have sshd running and want to use custom provider > (encryption/decryption) implementation calls instead of default > provider's. > > Please let me know anybody tried this before or someone knows this, > how SSHD can be configured for a custom provider (encryption / > decryption) calls. > > Note: Here both default provider and custom provider are activated at > the same time. > > Thank you, > Hareesh -- Tomáš Mráz, OpenSSL