sshkey_putb
if ((r = sshkey_putb(ctx->keys[i], buf)) != 0 ||
if ((r = sshkey_putb(server_host_public, server_host_key_blob)) != 0)
if ((r = sshkey_putb(server_host_public, server_host_key_blob)) != 0)
if ((r = sshkey_putb(k, b)) != 0)
if ((r = sshkey_putb(key, buf)) != 0)
if ((r = sshkey_putb(key, b)) != 0)
int sshkey_putb(const struct sshkey *, struct sshbuf *);