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openssh: only create sshd host keys which have been enabled

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Previously sshd_check_keys would create a full set of all possible
sshd host keys, even if sshd_config has been set to only enable
certain key types.

Update sshd_check_keys to only create keys which have been enabled in
sshd_config (with a fallback to creating a full set of key types if
no HostKey options are defined, as before).

(From OE-Core rev: 2303d795ae96f1a60caf145a0ddf100e89c4b5b0)

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Andre McCurdy
2018-06-07 11:48:39 -07:00
committed by Richard Purdie
parent 958fd9e6f9
commit 05881bbf35
1 changed files with 19 additions and 23 deletions
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42
meta/recipes-connectivity/openssh/openssh/sshd_check_keys
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@@ -56,27 +56,23 @@ while true ; do
esac
done
# parse location of keys
HOST_KEY_RSA=$(grep ^HostKey "${sshd_config}" | grep _rsa_ | tail -1 | awk ' { print $2 } ')
[ -z "${HOST_KEY_RSA}" ] && HOST_KEY_RSA=$(grep HostKey "${sshd_config}" | grep _rsa_ | tail -1 | awk ' { print $2 } ')
[ -z "${HOST_KEY_RSA}" ] && HOST_KEY_RSA=$SYSCONFDIR/ssh_host_rsa_key
HOST_KEY_ECDSA=$(grep ^HostKey "${sshd_config}" | grep _ecdsa_ | tail -1 | awk ' { print $2 } ')
[ -z "${HOST_KEY_ECDSA}" ] && HOST_KEY_ECDSA=$(grep HostKey "${sshd_config}" | grep _ecdsa_ | tail -1 | awk ' { print $2 } ')
[ -z "${HOST_KEY_ECDSA}" ] && HOST_KEY_ECDSA=$SYSCONFDIR/ssh_host_ecdsa_key
HOST_KEY_ED25519=$(grep ^HostKey "${sshd_config}" | grep _ed25519_ | tail -1 | awk ' { print $2 } ')
[ -z "${HOST_KEY_ED25519}" ] && HOST_KEY_ED25519=$(grep HostKey "${sshd_config}" | grep _ed25519_ | tail -1 | awk ' { print $2 } ')
[ -z "${HOST_KEY_ED25519}" ] && HOST_KEY_ED25519=$SYSCONFDIR/ssh_host_ed25519_key
HOST_KEYS=$(sed -n 's/^[ \t]*HostKey[ \t]\+\(.*\)/\1/p' "${sshd_config}")
[ -z "${HOST_KEYS}" ] && HOST_KEYS="$SYSCONFDIR/ssh_host_rsa_key $SYSCONFDIR/ssh_host_ecdsa_key $SYSCONFDIR/ssh_host_ed25519_key"
# create keys if necessary
if [ ! -f $HOST_KEY_RSA ]; then
echo " generating ssh RSA key..."
generate_key $HOST_KEY_RSA rsa
fi
if [ ! -f $HOST_KEY_ECDSA ]; then
echo " generating ssh ECDSA key..."
generate_key $HOST_KEY_ECDSA ecdsa
fi
if [ ! -f $HOST_KEY_ED25519 ]; then
echo " generating ssh ED25519 key..."
generate_key $HOST_KEY_ED25519 ed25519
fi
for key in ${HOST_KEYS} ; do
[ -f $key ] && continue
case $key in
*_rsa_key)
echo " generating ssh RSA host key..."
generate_key $key rsa
;;
*_ecdsa_key)
echo " generating ssh ECDSA host key..."
generate_key $key ecdsa
;;
*_ed25519_key)
echo " generating ssh ED25519 host key..."
generate_key $key ed25519
;;
esac
done