8a7c85dcf0
multiple improvements and checks for signed commits, makes sure that important script are not tampered with and much more.
269 lines
8.3 KiB
Bash
Executable file
269 lines
8.3 KiB
Bash
Executable file
#!/bin/bash
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echo "Fetching updates from $(git remote get-url origin) ..."
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echo ""
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git pull --verify-signatures
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if [[ ${?} -ne 0 ]]; then
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echo "WARNING: git pull did not exit successfully."
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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fi
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if [[ -f ./cosmos.conf ]]; then
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# shellcheck disable=SC1091
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source ./cosmos.conf
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fi
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# A tab will be used in multiple commands for git
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t=$'\t'
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# Set the default tag according to the repo
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# or by entering a name as the first argument.
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if [[ -z "${1}" ]]; then
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deftag="$(basename "${PWD}")"
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else
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deftag="${1}"
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fi
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# Set the tag prefix according to:
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# 1. $tag, if specified in cosmos.conf,
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# 2. or $deftag, as specified above.
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# shellcheck disable=SC2154
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if [[ ! -z "${tag}" ]]; then
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tagpfx="${tag}"
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else
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tagpfx="${deftag}"
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fi
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# Check why the tag couldn't be verified
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# First argument: the tag to investigate
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check_tag_sig_failure()
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{
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local __tag_to_check="${1}"
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# shellcheck disable=SC2155
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local __verify_tag_output="$(git verify-tag --raw "${__tag_to_check}" 2>&1)"
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if echo "${__verify_tag_output}" | grep -q "VALIDSIG"; then
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if echo "${__verify_tag_output}" | grep -q "EXPKEYSIG"; then
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echo ""
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echo "WARNING: The tag was correctly signed, but the copy of"
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echo "the key that you have stored on your computer has expired."
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echo "Check for an updated key in:"
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echo "global/overlay/etc/cosmos/keys/"
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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else
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echo ""
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echo "WARNING: The tag was probably correctly signed,"
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echo "but it still didn't pass the verification check."
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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fi
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else
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echo ""
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echo "WARNING: The signature of the tag could not be verified."
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echo "Please make sure that you have imported the key and that"
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echo "the key is signed by a trusted party."
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echo "Keys used for signing in a Cosmos repo can be found at:"
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echo "global/overlay/etc/cosmos/keys/"
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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fi
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}
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check_commit_sig_failure()
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{
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local __commit_to_check="${1}"
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local __file_related_to_commit="${2}"
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# shellcheck disable=SC2155
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local __verify_commit_output="$(git verify-commit --raw "${__commit_to_check}" 2>&1)"
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if echo "${__verify_commit_output}" | grep -q "VALIDSIG"; then
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if echo "${__verify_commit_output}" | grep -q "EXPKEYSIG"; then
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echo "WARNING: The commit to ${__file_related_to_commit}"
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echo "was correctly signed, but the copy of the key that"
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echo "you have stored on your computer has expired."
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echo "Check for an updated key in:"
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echo "global/overlay/etc/cosmos/keys/"
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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else
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echo "WARNING: The commit to ${__file_related_to_commit}"
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echo "was probably correctly signed, but it still didn't"
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echo "pass the verification check."
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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fi
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else
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echo "WARNING: The commit to ${__file_related_to_commit}"
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echo "could not be verified. Please make sure that you have"
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echo "imported the key and that the key is signed by a trusted party."
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "investigate and then run bump-tag again."
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exit 1
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fi
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}
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# Verify the last commit of a file
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# First argument: the file to verify
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verify_last_commit()
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{
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local __file_to_verify="${1}"
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if [[ ! -f "${__file_to_verify}" ]]; then
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return 1
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fi
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if [[ ! -z "$(git status --porcelain "${__file_to_verify}")" ]]; then
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echo ""
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echo "INFO: local changes detected in ${__file_to_verify},"
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echo "Not checking the signature of the last commit to ${__file_to_verify}."
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echo ""
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return 1
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fi
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# shellcheck disable=SC2155
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local __last_commit="$(git log -n 1 --pretty=format:%H -- "${__file_to_verify}")"
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if ! git verify-commit "${__last_commit}" 2> /dev/null; then
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echo ""
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echo "WARNING: Untrusted modification to ${__file_to_verify}:"
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echo "----------------------------"
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git verify-commit "$(git log -n 1 --pretty=format:%H -- "${__file_to_verify}")"
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echo "----------------------------"
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check_commit_sig_failure "${__last_commit}" "${__file_to_verify}"
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fi
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}
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tag_list="$(git tag -l "${tagpfx}-*")"
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if [[ ${?} -ne 0 ]] || [[ -z "${tag_list}" ]]; then
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echo "No tags found, verifying all commits instead."
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# %H = commit hash
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# %G? = show "G" for a good (valid) signature
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git_log="$(git log --pretty="format:%H${t}%G?" \
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--first-parent \
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| grep -v "${t}G$")"
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else
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last_tag="$(echo "${tag_list}" | sort | tail -1)"
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echo "Verifying last tag: ${last_tag} and the commits after that"
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git verify-tag "${last_tag}"
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if [[ ${?} -ne 0 ]]; then
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check_tag_sig_failure "${last_tag}"
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fi
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tag_object="$(git verify-tag -v "${last_tag}" 2>&1 | grep ^object | cut -d' ' -f2)"
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# The commits after the last valid signed git tag that we need to check
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revision_range="${tag_object}..HEAD"
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# Filter out the commits that are unsigned or untrusted
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# %H = commit hash
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# %G? = show "G" for a good (valid) signature
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git_log="$(git log --pretty="format:%H${t}%G?" "${revision_range}" \
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--first-parent \
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| grep -v "${t}G$")"
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fi
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if [[ ! -z "${git_log}" ]]; then
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echo ""
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echo -e "------WARNING: unsigned or untrusted commits after the last tag------"
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echo "${git_log}"
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echo -e "---------------------------------------------------------------------"
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echo "Quick referens on how to configure signing of commits in ~/.gitconfig:"
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echo "[user]"
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echo " signingkey = your-prefered-key-id"
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echo "[commit]"
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echo " gpgsign = true"
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echo ""
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echo "EXITING the script. In order to tag your changes,"
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echo "please make sure that you have configured signing of"
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echo "your own commits and that the listed unsigned commits"
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echo "have been made by a trusted party and are not malicous."
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exit 1
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fi
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# Always check that the last commit of certain
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# sensitive files is trusted, without taking into
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# account whether the last tag was trusted or not.
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verify_last_commit "./scripts/jsonyaml-no-output.py"
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verify_last_commit "./bump-tag"
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# Test the syntax of each YAML-file to be tagged.
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for file in $(git diff --name-only "${last_tag}..${this_branch}" | egrep "^.*\.(yaml|yml)$"); do
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if [[ -f "${file}" ]]; then
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./scripts/jsonyaml-no-output.py yaml "${file}"
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fi
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done
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echo "Differences between tag ${last_tag} and what you are about to sign:"
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# With PAGER=cat, git diff will simply dump the output to the screen.
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# shellcheck disable=SC2037
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PAGER=cat git diff --color "${last_tag}..${this_branch}"
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# Iterate over the $last_tag until $this_tag is set to a later version
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iter=1
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ok=
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while [[ -z "${ok}" ]]; do
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this_tag="$(date +"${tagpfx}-%Y-%m-%d-v$(printf "%02d" "${iter}")")"
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iter="$(( iter + 1))"
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case "$( (echo "${this_tag}"; echo "${last_tag}") | sort | tail -1 )" in
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"${last_tag}")
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;;
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"${this_tag}")
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ok=yes
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;;
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esac
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done
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if [ "${deftag}" != "${tagpfx}" ]; then
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echo -e "Using new tag \e[94m${this_tag}\e[0m according to pattern in cosmos.conf"
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else
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echo -e "Using new tag \e[94m${this_tag}\e[0m"
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fi
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echo -e "\e[1mONLY SIGN IF YOU APPROVE OF VERIFICATION AND DIFF ABOVE\e[0m"
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git tag $GITTAGEXTRA -m bump. -s "${this_tag}"
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git push
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git push --tags
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