Importing hostkey

[Michal Vaško <mvasko@xxxxxxxxx>]

Hello,
we have recently found an issue with importing RSA host key of length 2048 but presumably the problem may occur also with other key types/lengths. It seems to work fine when libssh is compiled with OpenSSL but not with gcrypt. The problem is tracked on GitHub [1]. My query is whether anyone can tell me more about this/had the same problem and fixed it somehow. It would be best if there was a format compatible with both backend libraries. Thanks for any input.

Some more details regarding the problem, the key is generated by:
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -outform PEM

Then, the header and footer is removed only to be added later [2] and stored back into a file. This file is then imported [3], which fails.

Regards,
Michal

[1] https://github.com/CESNET/Netopeer2/issues/534
[2] https://github.com/CESNET/libnetconf2/blob/devel/src/session_server_ssh.c#L43
[3] https://github.com/CESNET/libnetconf2/blob/devel/src/session_server_ssh.c#L1291