164 lines
4 KiB
Bash
Executable file
164 lines
4 KiB
Bash
Executable file
#!/bin/bash
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#
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# Script to edit secrets for a host.
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#
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# This script is used by an administrator on his/hers local machine. The
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# general principle is for this script to ssh to the target host, decrypt
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# the secrets and allow changes to be made, and then fetch the encrypted
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# secrets from the host and add it to the Cosmos repository on the
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# administrators machine.
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#
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# Funnily enough, this script will execute itself (with the argument
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# '--on-host') on the target host in order to do the decryption etc. Don't
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# allow this to confuse you and everything will be fine.
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#
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set -e
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umask 077
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LAST_OUTPUT_FILENAME="/root/.last_edit-secrets_output"
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if [[ "x${EDITOR}" != "x" ]]; then
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declare -r REMOTE_EDITOR="${EDITOR}"
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else
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declare -r REMOTE_EDITOR='/usr/bin/vim.tiny'
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fi
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if [ "x$1" = "x" ]; then
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echo "Syntax: $0 -l OR fqdn"
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exit 1
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fi
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if [ "x$1" != "x-l" ]; then
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host=$(echo $1 | sed -e 's!/*$!!') # remove trailing slashes
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if [ ! -d $host ]; then
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echo "$0: No host-directory for '$host' found - execute in top-level cosmos dir"
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exit 1
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fi
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# Execute this very script, on a remote host
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TMPFILE=$(mktemp edit-secrets.$$.XXXXXXX)
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if [ ! -f $TMPFILE ]; then
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echo "$0: Failed creating temporary file"
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exit 1
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fi
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TMPFILE2=$(mktemp edit-secrets.$$.XXXXXXX)
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if [ ! -f $TMPFILE2 ]; then
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echo "$0: Failed creating temporary file"
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exit 1
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fi
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trap "rm -f $TMPFILE $TMPFILE2" EXIT
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ssh -t root@$host EDITOR="${REMOTE_EDITOR}" /var/cache/cosmos/repo/edit-secrets -l
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scp -q root@$host:$LAST_OUTPUT_FILENAME $TMPFILE
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if grep ^"STATUS=UPDATED" $TMPFILE > /dev/null; then
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# extract the path of the file that should be updated in the Cosmos repo
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save_to="${host}/overlay/etc/hiera/data/secrets.yaml.asc"
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mkdir -p "`dirname $save_to`"
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# extract the GPG output
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perl -e '$a = 0; while (<>) { $a = 1 if ($_ =~ /-+BEGIN PGP MESSAGE-+/);
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print $_ if $a; $a = 0 if ($_ =~ /-+END PGP MESSAGE-+/); }' < $TMPFILE > $TMPFILE2
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if ! grep "END PGP MESSAGE" $TMPFILE2 > /dev/null; then
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echo "$0: Failed extracting PGP output from file $TMPFILE into $TMPFILE2"
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exit 1
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fi
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# use cat to preserve permissions etc.
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cat $TMPFILE > $save_to
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git add $save_to
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echo ""
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echo "$save_to updated"
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echo ""
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else
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echo ""
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echo "Not updated"
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echo ""
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fi
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rm $TMPFILE $TMPFILE2
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exit 0
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fi
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#
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# Local execution on a host
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#
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SECRETFILE=/etc/hiera/data/secrets.yaml.asc
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GNUPGHOME=/etc/hiera/gpg/
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export GNUPGHOME
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GPG=`which gpg2 || true`
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if [ ! -x "$GPG" ]; then
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GPG=`which gpg || true`
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if [ ! -x "$GPG" ]; then
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echo "$0: gpg2 or gpg not found"
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exit 1
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fi
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fi
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TMPFILE=$(mktemp --tmpdir=/dev/shm)
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TMPFILE2=$(mktemp --tmpdir=/dev/shm)
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if [ ! -f $TMPFILE ]; then
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echo "$TMPFILE"
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echo "$0: Failed creating temporary file"
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exit 1
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fi
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if [ ! -f $TMPFILE2 ]; then
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echo "$TMPFILE2"
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echo "$0: Failed creating temporary file 2"
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exit 1
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fi
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trap "rm -f $TMPFILE $TMPFILE2" EXIT
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if ! $GPG --list-secret-keys | grep -q ^"sec\s"; then
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echo "$0: Secret key does not exist (in $GNUPGHOME)."
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echo ""
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echo "Generate it with /var/cache/cosmos/model/pre-tasks.d/040hiera-gpg"
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echo ""
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exit 1
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fi
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if [ -s $SECRETFILE ]; then
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$GPG -d $SECRETFILE > $TMPFILE
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fi
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cp $TMPFILE $TMPFILE2
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sensible-editor $TMPFILE
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rm -f ${TMPFILE}~ ${TMPFILE2}~
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echo ""
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echo ""
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status=0
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cmp -s $TMPFILE $TMPFILE2 || status=1
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if [ $status -eq 0 ]; then
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(
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echo "STATUS=NOT_CHANGED"
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) > $LAST_OUTPUT_FILENAME
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echo ""
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echo "$0: No changes detected"
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else
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# figure out this hosts gpg key id
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recipient=$($GPG --list-secret-key | grep ^sec | head -1 | awk '{print $2}' | cut -d / -f 2)
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save_to="`hostname --fqdn`/overlay${SECRETFILE}"
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echo ""
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(
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echo "STATUS=UPDATED"
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echo ""
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) > $LAST_OUTPUT_FILENAME
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$GPG --output - --armor --recipient $recipient --sign --encrypt $TMPFILE >> $LAST_OUTPUT_FILENAME
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echo ""
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echo "GPG output saved in $LAST_OUTPUT_FILENAME - save it in Cosmos as"
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echo ""
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echo " $save_to"
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echo ""
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fi
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