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Editing: sshd-keygen
#!/usr/bin/bash # Create the host keys for the OpenSSH server. KEYTYPE=$1 case $KEYTYPE in "dsa") ;& # disabled in FIPS "ed25519") FIPS=/proc/sys/crypto/fips_enabled if [[ -r "$FIPS" && $(cat $FIPS) == "1" ]]; then exit 0 fi ;; "rsa") if [[ ! -z $SSH_RSA_BITS ]]; then SSH_KEYGEN_OPTIONS="-b $SSH_RSA_BITS" fi ;; # always ok "ecdsa") if [[ ! -z $SSH_ECDSA_BITS ]]; then SSH_KEYGEN_OPTIONS="-b $SSH_ECDSA_BITS" fi ;; *) # wrong argument exit 12 ;; esac KEY=/etc/ssh/ssh_host_${KEYTYPE}_key KEYGEN=/usr/bin/ssh-keygen if [[ ! -x $KEYGEN ]]; then exit 13 fi # remove old keys rm -f $KEY{,.pub} # create new keys if ! $KEYGEN -q -t $KEYTYPE $SSH_KEYGEN_OPTIONS -f $KEY -C '' -N '' >&/dev/null; then exit 1 fi # sanitize permissions /usr/bin/chmod 600 $KEY /usr/bin/chmod 644 $KEY.pub if [[ -x /usr/sbin/restorecon ]]; then /usr/sbin/restorecon $KEY{,.pub} fi exit 0
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