> On 8 Jul 2021, at 14:05, Mats Lindestam via curl-library > <curl-library@cool.haxx.se> wrote:
> I am trying to implement support for SHA256 public keys. I have been able to > reach as far as the lib/vssh/libssh2.c file and the ssh_check_fingerprint > function. Now I have no idea on how to calculate the SHA156 public key from > the hostkey hash, a.k.a. 'fingerprint, in the same manner as done for the MD5 > public key (See > https://github.com/curl/curl/blob/master/lib/vssh/libssh2.c#L627). From where > have you picked up the algorithm for MD5, from the 'The MD5 Message-Digest > Algorithm' RFC (https://www.ietf.org/rfc/rfc1321.txt)? > Is there an RFC that explains the 'The SHA256 Message-Digest Algorithm'? > Does any know where to get information about this? You don’t need to implment SHA256 on your own, in fact you really shouldn’t. AFAICT libssh2 supports SHA256 by passing LIBSSH2_HOSTKEY_HASH_SHA256 to libssh2_hostkey_hash(). -- Daniel Gustafsson https://vmware.com/ ------------------------------------------------------------------- Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library Etiquette: https://curl.se/mail/etiquette.html
