87 lines
2.1 KiB
Bash
Executable file
87 lines
2.1 KiB
Bash
Executable file
#!/bin/bash
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set -euo pipefail
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# Usage:
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#
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# 1) Put this into your ~/.docker/config.json:
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# { "credsStore": "vault" }
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#
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# 2) Optional: Create ~/.config/docker-credential-vault with an
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# override for the $PREFIX variable which defaults to
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# "secret/docker-credential" in case you want to store the
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# credentials some place else. If you want the script to
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# behave more verbose you can set NO_LOG=0 in order to enable
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# logging all actions to STDERR
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#
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# 3) Ensure vault is installed and can access the path specified by
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# $PREFIX/*
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config="${HOME}/.config/docker-credential-vault"
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req_cmds=(jq md5sum vault)
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NO_LOG=1
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PREFIX=secret/docker-credential
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[[ -f $config ]] && source "${config}" || true
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function check_command() {
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command -v "${1}" >/dev/null || {
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echo "Missing tool: ${1}" >&2
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exit 1
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}
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}
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function get() {
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local hostname="$(cat -s)" # Missing newline at the end, read does not work
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log "Retrieving credential for ${hostname} if exists..."
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vault read -field=data -format=json "${PREFIX}/$(hash_hostname "${hostname}")"
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}
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function erase() {
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local hostname="$(cat -s)" # Missing newline at the end, read does not work
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log "Deleting credential for ${hostname} if exists..."
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vault delete "${PREFIX}/$(hash_hostname "${hostname}")" >/dev/null
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}
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function hash_hostname() {
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echo "$1" | md5sum | cut -d ' ' -f 1
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}
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function log() {
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[ $NO_LOG -eq 0 ] || return 0
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echo "[$(date +%H:%M:%S)][docker-credential-vault] $@" >&2
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}
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function main() {
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for cmd in "${req_cmds[@]}"; do
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check_command "${cmd}"
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done
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case "${1:-help}" in
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get) get ;;
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erase) erase ;;
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store) store ;;
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*)
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echo "Supported are only: get, erase, store'" >&2
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exit 1
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;;
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esac
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}
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function store() {
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local json="$(cat -s)"
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local hostname=$(echo "${json}" | jq -r '.ServerURL')
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local username=$(echo "${json}" | jq -r '.Username')
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local secret=$(echo "${json}" | jq -r '.Secret')
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log "Updating credential for ${hostname}..."
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vault write "${PREFIX}/$(hash_hostname "${hostname}")" \
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"ServerURL=${hostname}" \
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"Username=${username}" \
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"Secret=${secret}"
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}
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main "$@"
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