Fix more Roihu SSH configs

Author: AgenttiX

ssh/ssh-keygen.sh

@@ -10,6 +10,8 @@ set -eu
 # https://security.stackexchange.com/questions/143442/what-are-ssh-keygen-best-practices
 # https://stribika.github.io/2015/01/04/secure-secure-shell.html
 # https://en.wikipedia.org/wiki/Key_size
+# CSC servers require a minimum of 4096 bits for RSA keys.
+# https://docs.csc.fi/computing/connecting/ssh-keys/#adding-public-key-in-mycsc
 
 # When running, don't accidentally overwrite your existing keys!
 ssh-keygen -t rsa -b 4096

zsh/custom/ssh.zsh

@@ -10,7 +10,7 @@ assh() {
     if [ -f "${CSC_CERT_TOOL}" ]; then
       local SSH_USER="$(awk '$1 == "user" { print $2 }' <<< "$SSH_SETTINGS")"
       local STRIPPED_HOSTNAME="${HOST%"-kubuntu"}"
-      local SSH_KEY_NAME="id_ed25519_${STRIPPED_HOSTNAME}"
+      local SSH_KEY_NAME="id_rsa_tpm_${STRIPPED_HOSTNAME}"
       local SSH_KEY_PATH="${HOME}/.ssh/${SSH_KEY_NAME}.pub"
       if [ -f "${SSH_KEY_PATH}" ]; then
         "${CSC_CERT_TOOL}" -u "${SSH_USER}" "${SSH_KEY_PATH}"