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125 lines
3.1 KiB
125 lines
3.1 KiB
#!/bin/bash
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# Create the host keys for the OpenSSH server.
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#
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# The creation is controlled by the $AUTOCREATE_SERVER_KEYS environment
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# variable.
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# OpenSSH 7.0 depreceated DSA keys. We don't create DSA be default, but you can add 'DSA' to the list bellow.
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AUTOCREATE_SERVER_KEYS="RSA ECDSA ED25519"
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FAIL='0'
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# Some functions to make the below more readable
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KEYGEN=/usr/bin/ssh-keygen
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DIR=/etc/doskast/ssh
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RSA_KEY="$DIR"/ssh_host_rsa_key
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DSA_KEY="$DIR"/ssh_host_dsa_key
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ECDSA_KEY="$DIR"/ssh_host_ecdsa_key
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ED25519_KEY="$DIR"/ssh_host_ed25519_key
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do_rsa_keygen() {
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if [ ! -s $RSA_KEY ]; then
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echo -n $"Generating SSH2 RSA host key: "
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rm -f $RSA_KEY
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# XXX use umask 077 here!
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if test ! -f $RSA_KEY && $KEYGEN -q -t rsa -f $RSA_KEY -C '' -N '' >&/dev/null; then
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chmod 600 $RSA_KEY
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chmod 644 $RSA_KEY.pub
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if [ -x /sbin/restorecon ]; then
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/sbin/restorecon $RSA_KEY{,.pub}
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fi
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echo "RSA key $RSA_KEY generated."
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return 0
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else
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echo "Failed to generate RSA key $RSA_KEY!"
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FAIL='1'
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return 1
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fi
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fi
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}
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do_dsa_keygen() {
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if [ ! -s $DSA_KEY ]; then
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echo -n $"Generating SSH2 DSA host key: "
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rm -f $DSA_KEY
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if test ! -f $DSA_KEY && $KEYGEN -q -t dsa -f $DSA_KEY -C '' -N '' >&/dev/null; then
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chmod 600 $DSA_KEY
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chmod 644 $DSA_KEY.pub
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if [ -x /sbin/restorecon ]; then
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/sbin/restorecon $DSA_KEY{,.pub}
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fi
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echo "DSA key $DSA_KEY generated."
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return 0
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else
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echo "Failed to generate DSA key $DSA_KEY!"
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FAIL='1'
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return 1
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fi
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fi
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}
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do_ecdsa_keygen() {
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if [ ! -s $ECDSA_KEY ]; then
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echo -n $"Generating SSH2 ECDSA host key: "
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rm -f $ECDSA_KEY
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if test ! -f $ECDSA_KEY && $KEYGEN -q -t ecdsa -f $ECDSA_KEY -C '' -N '' >&/dev/null; then
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chmod 600 $ECDSA_KEY
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chmod 644 $ECDSA_KEY.pub
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if [ -x /sbin/restorecon ]; then
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/sbin/restorecon $ECDSA_KEY{,.pub}
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fi
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echo "ECDSA key $ECDSA_KEY generated."
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return 0
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else
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echo "Failed to generate ECDSA key $ECDSA_KEY!"
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FAIL='1'
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return 1
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fi
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fi
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}
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do_ed25519_keygen() {
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if [ ! -s $ED25519_KEY ]; then
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echo -n $"Generating SSH2 ED25519 host key: "
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rm -f "$ED25519_KEY"
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if test ! -f $ED25519_KEY && $KEYGEN -q -t ed25519 -f $ED25519_KEY -C '' -N '' >&/dev/null; then
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chmod 600 $ED25519_KEY
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chmod 644 $ED25519_KEY.pub
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if [ -x /sbin/restorecon ]; then
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/sbin/restorecon $ED25519_KEY{,.pub}
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fi
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echo "ED25519 key $ED25519_KEY generated."
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return 0
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else
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echo "Failed to generate ED25519 key $ED25519_KEY!"
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FAIL='1'
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return 1
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fi
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fi
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}
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if [ "x${AUTOCREATE_SERVER_KEYS}" == "xNO" ]; then
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exit 0
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fi
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# legacy options
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case $AUTOCREATE_SERVER_KEYS in
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NODSA) AUTOCREATE_SERVER_KEYS="RSA ECDSA ED25519";;
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RSAONLY) AUTOCREATE_SERVER_KEYS="RSA";;
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YES) AUTOCREATE_SERVER_KEYS="RSA ECDSA ED25519";;
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esac
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for KEY in $AUTOCREATE_SERVER_KEYS; do
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case "$KEY" in
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DSA) do_dsa_keygen;;
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RSA) do_rsa_keygen;;
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ECDSA) do_ecdsa_keygen;;
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ED25519) do_ed25519_keygen;;
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esac
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done
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# not zero return code if any error has ever occured to make systemd service sshd-keygen.service failed in case of any errors
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if [ "$FAIL" = '1' ]
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then exit 1
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else exit 0
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fi
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