A script that will help me test a ca-bundle pull request: <https://github.com/bagder/ca-bundle>

COPYING.txt

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flake.lock

{
  "nodes": {
    "nixpkgs": {
      "locked": {
        "lastModified": 1730137625,
        "narHash": "sha256-9z8oOgFZiaguj+bbi3k4QhAD6JabWrnv7fscC/mt0KE=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "64b80bfb316b57cdb8919a9110ef63393d74382a",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-24.05",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "nixpkgs": "nixpkgs"
      }
    }
  },
  "root": "root",
  "version": 7
}

flake.nix

# 🅭🄍1.0 This file is dedicated to the public domain using the CC0 1.0 Universal
# Public Domain Dedication: <https://creativecommons.org/publicdomain/zero/1.0/>.
#
# If you use the Nix package manager, then you can start a shell with all of
# the dependencies that you need to run verify.sh by running this command:
#
#  nix --extra-experimental-features 'nix-command flakes' develop
#
# If you don’t use the Nix package manager, then you can safely ignore this
# file.
{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
  outputs = { self, nixpkgs }: let
    system = "x86_64-linux";
    pkgs = nixpkgs.legacyPackages."${system}";
  in {
    devShells."${system}".default = pkgs.mkShell {
      name = "shell-for-running-verify.sh";
      packages = with pkgs; [
        perl
        perlPackages.libwwwperl
        libfaketime
        openssl
      ];
    };
  };
}

verify.sh

#!/usr/bin/env bash
# 🅭🄍1.0 This file is dedicated to the public domain using the CC0 1.0 Universal
# Public Domain Dedication: <https://creativecommons.org/publicdomain/zero/1.0/>.
set -o errexit -o nounset -o pipefail
# See <man:sysexits.h(3head)>.
readonly ex_usage=64
readonly ex_dataerr=65
export GIT_PAGER=''


function clean_up {
	cd /
	git -C "$curl_repo" worktree remove --force "$curl_worktree" || true  # It’s OK if this command fails.
	git -C "$ca_bundle_repo" worktree remove --force "$ca_bundle_worktree" || true  # It’s OK if this command fails.
	rm --recursive "$temporary_directory"
}


function remove_leading_and_trailing_spaces {
	printf '%s' "$*" | sed 's/^[[:blank:]]*//;s/[[:blank:]]*$//'
}

function extract_timestamp_helper {
	grep \
		--only-matching \
		--color \
		--perl-regexp \
		--regexp="$*" \
		ca-bundle.crt | tr '\n' ' '
}

function extract_timestamp {
	local result="$(extract_timestamp_helper '(?<=## Certificate data from Mozilla as of: ).*' || extract_timestamp_helper '(?<=## Certificate data from Mozilla downloaded on: ).*')"
	printf '%s' "$result"
	if printf '%s' "$result" | grep --quiet GMT
	then
		echo
	else
		echo 'UTC'
	fi
}

function run_mk_ca_bundle {
	local certdata_url="$1"
	local timestamp="$2"

	# mk-ca-bundle.pl was located in <curl-repo>/lib until this commit:
	# 8e22fc68e (scripts: move three scripts from lib/ to scripts/,
	# 2022-03-23)
	if [ -e "$curl_worktree/lib/mk-ca-bundle.pl" ]
	then
		local mk_ca_bundle="$curl_worktree/lib/mk-ca-bundle.pl"
	else
		local mk_ca_bundle="$curl_worktree/scripts/mk-ca-bundle.pl"
	fi

	sleep 5s  # Rate limiting.
	curl --output certdata.txt "$certdata_url"
	touch --date="$timestamp" certdata.txt
	set -x
	# Newer versions of mk-ca-bundle won’t include certificates in
	# ca-bundle.crt if the certificates are expired. That’s why we have to
	# use faketime here. Otherwise, we won’t exactly reproduce the old
	# ca-bundle.crt file.
	#
	# Also, /usr/bin/perl doesn’t exist on my system, so I can’t run older
	# versions of mk-ca-bundle.pl directly. Instead, I have to run
	# ‘perl "$mk_ca_bundle"’.
	faketime "$timestamp" perl "$mk_ca_bundle" -n
	set +x
}



if [ "$#" -ne 2 ]
then
	echo "USAGE: ${0@Q} <path-to-curl-repo> <path-to-ca-bundle-repo>" >&2
	exit "$ex_usage"
fi

curl_repo="$(readlink --canonicalize "$1")"
readonly curl_repo
ca_bundle_repo="$(readlink --canonicalize "$2")"
readonly ca_bundle_repo

temporary_directory="$(mktemp --directory --suffix=-for-verify.sh)"
trap clean_up EXIT
readonly temporary_directory

readonly curl_worktree="$temporary_directory/curl"
git -C "$curl_repo" worktree add --detach "$curl_worktree"
readonly ca_bundle_worktree="$temporary_directory/ca-bundle"
git -C "$ca_bundle_repo" worktree add --detach "$ca_bundle_worktree"

readonly ca_bundle_commit_that_added_certdata=d718bef3c0c256d66466f496f11f7e1b5c88bd03
# First, make sure that there isn’t a typo in
# ca_bundle_commit_that_added_certdata’s hash.
git -C "$ca_bundle_repo" merge-base --is-ancestor "$ca_bundle_commit_that_added_certdata" master

# Second, make sure that every commit that comes before
# $ca_bundle_commit_that_added_certdata is mentioned in the README.
git -C "$ca_bundle_repo" log --format=format:'%H%n' "$ca_bundle_commit_that_added_certdata^" | while read -r hash
do
	if ! grep --fixed-strings "$hash" "$ca_bundle_repo/README.md" > /dev/null
	then
		echo "README.md didn’t mention this commit: $hash" >&2
		exit "$ex_dataerr"
	fi
done

# Third, make sure that the link really does lead to the corresponding source:
cd "$ca_bundle_worktree"
grep --color --ignore-case --perl-regexp '^\| [0-9a-f]+ \| .* \|$' "$ca_bundle_repo/README.md" | while read -r line
do
	ca_bundle_commit="$(printf '%s' "$line" | cut --delimiter='|' --fields=2)"
	ca_bundle_commit="$(remove_leading_and_trailing_spaces "$ca_bundle_commit")"
	new_certdata_url="$(printf '%s' "$line" | cut --delimiter='|' --fields=3)"
	new_certdata_url="$(remove_leading_and_trailing_spaces "$new_certdata_url")"
	if [ "$new_certdata_url" != 'Same as the previous commit' ]
	then
		certdata_url="$new_certdata_url"
	fi

	echo
	echo
	echo "Testing ca-bundle commit $ca_bundle_commit…"

	git switch --quiet --detach "$ca_bundle_commit"
	if [ "$certdata_url" = N/A ]
	then
		if [ -e ca-bundle.crt ]
		then
			echo "ERROR: The certdata URL should only be set to N/A if ca-bundle.crt doesn’t exist." >&2
			exit "$ex_dataerr"
		fi
	else
		ca_bundle_timestamp="$(extract_timestamp)"
		# Different versions of mk-ca-bundle produce different results.
		# In order to reproduce an old ca-bundle.crt file exactly, we
		# need to use the latest version of mk-ca-bundle that existed
		# when the old ca-bundle.crt file was created.
		curl_commit_with_correct_version_of_mk_ca_bundle="$(git \
			-C "$curl_repo" \
			log \
				--before="$ca_bundle_timestamp" \
				--format=format:'%H' master \
				--max-count=1
		)"
		git -C "$curl_worktree" switch --quiet --detach "$curl_commit_with_correct_version_of_mk_ca_bundle"
		run_mk_ca_bundle "$certdata_url" "$ca_bundle_timestamp"
		git clean --quiet --force -dx .
		git diff --exit-code
		git restore --quiet .
	fi
	echo The commit passed the test.
done
echo All commits passed the test!