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feat: updateRepo with single Unix user and unique SSH pubkey

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bsourisse 2023-08-22 21:11:28 +02:00 committed by Ravinou
parent a735144a55
commit eace07ed9a
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1 changed files with 46 additions and 21 deletions
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67
helpers/shells/updateRepo.sh Executable file → Normal file
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@ -1,20 +1,25 @@
#!/usr/bin/env bash
# Shell created by Raven for BorgWarehouse.
# This shell takes 2 args : [user] [new SSH pub key] [quota]
# This shell updates the ssh key for a repository.
# This shell takes 3 args: [repositoryName] [new SSH pub key] [quota]
# This shell updates the SSH key and the quota for a repository.
# Exit when any command fails
set -e
# Check args
if [ "$1" == "" ] || [ "$2" == "" ] || [ "$3" == "" ];then
echo "This shell takes 3 args : [user] [new SSH pub key] [quota]"
exit 1
# Load .env if exists
if [[ -f .env ]]; then
source .env
fi
# Some variables
home="/var/borgwarehouse/$1"
# Default value if .env not exists
: "${home:=/home/borgwarehouse}"
# Check args
if [ "$1" == "" ] || [ "$2" == "" ] || [ "$3" == "" ]; then
echo "This shell takes 3 args: [repositoryName] [new SSH pub key] [quota]"
exit 1
fi
# Check if the SSH public key is a valid format
# This pattern validates SSH public keys for : rsa, ed25519, ed25519-sk
@ -25,23 +30,43 @@ then
exit 2
fi
# Check if username length is 8 char. With createRepo.sh our randoms have a length of 8 characters.
# If we receive another length there is necessarily a problem.
username=$1
if [ ${#username} != 8 ]
then
echo "Error with the length of the username."
# Check if repositoryName length is 8 char. With createRepo.sh our randoms have a length of 8 characters.
# If we receive another length, there is necessarily a problem.
repositoryName=$1
if [ ${#repositoryName} != 8 ]; then
echo "Error with the length of the repositoryName."
exit 3
fi
# Check if the user exists
if ! id "$1" &>/dev/null; then
echo "The user $1 does not exist"
# Check if a line in authorized_keys contains repository_name
if ! grep -q "command=\".*${repositoryName}.*\",restrict" "$home/.ssh/authorized_keys"; then
echo "No line containing $repositoryName found in authorized_keys"
exit 4
fi
# Modify authorized_keys for the user : only the ssh key is modify with this regex
sudo sed -ri "s|(command=\".*\",restrict ).*|\1$2|g" "$home/.ssh/authorized_keys"
# Check if the new SSH pub key is already present on a line OTHER than the one corresponding to repositoryName
found=false
regex="command=\".*${repositoryName}.*\",restrict"
while IFS= read -r line; do
if [[ $line =~ $pattern ]]; then
# Get the SSH pub key of the line (ignore the comment)
key1=$(echo ${BASH_REMATCH[0]} | awk '{print $1 " " $2}')
# Get the SSH pub key of the new SSH pub key (ignore the comment)
key2=$(echo "$2" | awk '{print $1 " " $2}')
if [ "$key1" == "$key2" ]; then
# If the SSH pub key is already present on a line other than the one corresponding to repositoryName
if [[ ! $line =~ $regex ]]; then
found=true
break
fi
fi
fi
done < "$home/.ssh/authorized_keys"
if [ "$found" = true ]; then
echo "The new SSH pub key $2 is already present in authorized_keys on a different line."
exit 5
fi
# Modify authorized_keys for the user : only the quota is modify with this regex
sudo sed -ri "s|--storage-quota.*\"|--storage-quota $3G\"|g" "$home/.ssh/authorized_keys"
# Modify authorized_keys for the repositoryName: update the line with the quota and the SSH pub key
sudo sed -ri "s|(command=\".*${repositoryName}.*--storage-quota ).*G\",restrict .*|\\1$3G\",restrict $2|g" "$home/.ssh/authorized_keys"