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Merge bitcoin/bitcoin#22182: guix: Overhaul how guix-{attest,verify} works and hierarchy

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e2c40a4ed5272d72fea997bd936fba28bb753226 guix-attest: Error out if SHA256SUMS is unexpected (Carl Dong)
4cc35daed557f38b080360a89036b2e97a6f78c2 Rewrite guix-{attest,verify} for new hier (Carl Dong)
28a9c9b83924f585b397f0f3b8e9e73780ac0ad6 Make SHA256SUMS fragment right after build (Carl Dong)

Pull request description:

  Based on:  #22075
  Code reviewers: I recommend reading the new `guix-{attest,verify}` files instead of trying to read the diff

  The following changes resolve many usability improvements which were pointed out to me:
  1. Some maintainers like to extract their "uncodesigned tarball" inside the `output/` directory, resulting in the older `guix-attest` mistakenly attesting to the extracted contents
  2. Maintainers whose GPG keys reside on an external smartcard often need to physically interact with the smartcard as a way to approve the signing operation, having one signature per platform means a lot of fidgeting
  3. Maintainers wishing to sign on a separate machine now has the option of transferring only a subtree of `output/`, namely `output/*/SHA256SUMS.part`, in order to perform a signature (you may need to specify an `$OUTDIR_BASE` env var)
  4. An `all.SHA256SUMS` file should be usable as the base `SHA256SUMS` in bitcoin core torrents and on the release server.

  For those who sign on an separate machine than the one you do builds on, the following steps will work:
  1. `env GUIX_SIGS_REPO=/home/achow101/guix.sigs SIGNER=achow101 NO_SIGN=1 ./contrib/guix/guix-attest`
  2. Copy `/home/achow101/guix.sigs/<tag>/achow101` (which does not yet have signatures) to signing machine
  3. Sign the `SHA256SUMS` files:
      ```bash
      for i in "<path-to-achow101>/*.SHA256SUMS"; do
          gpg --detach-sign --local-user "<your-key-here>" --armor --output "$i"{.asc,}
      done
      ```
  5. Upload `<path-to-achow101>` (now with signatures) to `guix.sigs`

  -----

  After this change, output directories will now include a `SHA256SUMS.part` fragment, created immediately after a successful build:
  ```
  output
  └── x86_64-w64-mingw32
      ├── bitcoin-4e069f7589da-win64-debug.zip
      ├── bitcoin-4e069f7589da-win64-setup-unsigned.exe
      ├── bitcoin-4e069f7589da-win64.zip
      ├── bitcoin-4e069f7589da-win-unsigned.tar.gz
      └── SHA256SUMS.part
  ```

  These `SHA256SUMS.part` fragments look something like:
  ```
  3ebd7262b1a0a5bb757fef1f70e7e14033c70f98c059bc4dbfee5d1992b25825  dist-archive/bitcoin-4e069f7589da.tar.gz
  def2e7d3de5ab3e3f955344e75151df4f33713f9101f5295bd13c9375bdf633b  x86_64-w64-mingw32/bitcoin-4e069f7589da-win64-debug.zip
  643049fe3ee4a4e83a1739607e67b11b7c9b1a66208a6f35a9ff634ba795500e  x86_64-w64-mingw32/bitcoin-4e069f7589da-win64-setup-unsigned.exe
  a247a1ccec0ccc2e138c648284bd01f6a761f2d8d6d07d91b5b4a6670ec3f288  x86_64-w64-mingw32/bitcoin-4e069f7589da-win-unsigned.tar.gz
  fab76a836dcc592e39c04fd2396696633fb6eb56e39ecbf6c909bd173ed4280c  x86_64-w64-mingw32/bitcoin-4e069f7589da-win64.zip
  ```

  Meaning that they are valid `SHA256SUMS` files when `sha256sum --check`'d at the `guix-build-*/output` directory level

  When `guix-attest` is invoked, these `SHA256SUMS.part` files are combined and sorted (by `-k2`, `LC_ALL=C`) to create:

  1. `noncodesigned.SHA256SUMS` for a manifest of all non-codesigned outputs, and
  3. `all.SHA256SUMS` for a manifest of all outputs including non-codesigned outputs

  Then both files are signed, resulting in the following `guix.sigs` hierarchy:
  ```
  4e069f7589da/
  └── dongcarl
      ├── all.SHA256SUMS
      ├── all.SHA256SUMS.asc
      ├── noncodesigned.SHA256SUMS
      └── noncodesigned.SHA256SUMS.asc
  ```

ACKs for top commit:
  achow101:
    ACK e2c40a4ed5272d72fea997bd936fba28bb753226
  hebasto:
    ACK e2c40a4ed5272d72fea997bd936fba28bb753226, tested on Linux Mint 20.1 (x86_64) with and w/o `NO_SIGN=1`. Changes in `contrib/guix/libexec/codesign.sh` and `contrib/guix/guix-verify` are reviewed only.

Tree-SHA512: 618aacefb0eb6595735a9ab6a98ea6598fce65f9ccf33fa1e7ef93bf140c0f6cfc16e34870c6aa3e4777dd3f004b92a82a994141879870141742df948ec59c1f
This commit is contained in:
fanquake 2021-06-17 13:10:29 +08:00 committed by PastaPastaPasta
parent 7297abfcaf
commit 56d2bc249b
5 changed files with 200 additions and 132 deletions
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167
contrib/guix/guix-attest
View File

@ -99,24 +99,34 @@ fi
# We should be able to find at least one output
################
echo "Looking for build output directories in ${OUTDIR_BASE}"
echo "Looking for build output SHA256SUMS fragments in ${OUTDIR_BASE}"
shopt -s nullglob
OUTDIRS=( "${OUTDIR_BASE}"/* ) # This expands to an array of directories...
sha256sum_fragments=( "$OUTDIR_BASE"/*/SHA256SUMS.part ) # This expands to an array of directories...
shopt -u nullglob
if (( ${#OUTDIRS[@]} )); then
echo "Found build output directories:"
for outdir in "${OUTDIRS[@]}"; do
noncodesigned_fragments=()
codesigned_fragments=()
if (( ${#sha256sum_fragments[@]} )); then
echo "Found build output SHA256SUMS fragments:"
for outdir in "${sha256sum_fragments[@]}"; do
echo " '$outdir'"
case "$outdir" in
"$OUTDIR_BASE"/*-codesigned/SHA256SUMS.part)
codesigned_fragments+=("$outdir")
;;
*)
noncodesigned_fragments+=("$outdir")
;;
esac
done
echo
else
echo "ERR: Could not find any build output directories in ${OUTDIR_BASE}"
echo "ERR: Could not find any build output SHA256SUMS fragments in ${OUTDIR_BASE}"
exit 1
fi
##############
## Attest ##
##############
@ -126,82 +136,105 @@ fi
# HOST: The output directory being attested
#
out_name() {
basename "$1"
basename "$(dirname "$1")"
}
# Usage: out_sig_dir $outdir
#
# outdir: The output directory being attested
#
out_sig_dir() {
echo "$GUIX_SIGS_REPO/$VERSION/$(out_name "$1")/$signer_name"
}
shasum_already_exists() {
cat <<EOF
--
# Accumulate a list of signature directories that already exist...
outdirs_already_attested_to=()
ERR: An ${1} file already exists for '${VERSION}' and attests
differently. You likely previously attested to a partial build (e.g. one
where you specified the HOST environment variable).
See the diff above for more context.
Hint: You may wish to remove the existing attestations and their signatures by
invoking:
rm '${PWD}/${1}'{,.asc}
Then try running this script again.
EOF
}
echo "Attesting to build outputs for version: '${VERSION}'"
echo ""
# MAIN LOGIC: Loop through each output for VERSION and attest to output in
# GUIX_SIGS_REPO as SIGNER, if attestation does not exist
for outdir in "${OUTDIRS[@]}"; do
if [ -e "${outdir}/SKIPATTEST.TAG" ]; then
echo "${outname}: SKIPPING: Output directory marked with SKIPATTEST.TAG file"
continue
fi
outname="$(out_name "$outdir")"
outsigdir="$(out_sig_dir "$outdir")"
if [ -e "$outsigdir" ]; then
echo "${outname}: SKIPPING: Signature directory already exists in the specified guix.sigs repository"
outdirs_already_attested_to+=("$outdir")
else
# Clean up incomplete sigdir if something fails (likely gpg)
trap 'rm -rf "$outsigdir"' ERR
outsigdir="$GUIX_SIGS_REPO/$VERSION/$signer_name"
mkdir -p "$outsigdir"
(
cd "$outsigdir"
mkdir -p "$outsigdir"
temp_noncodesigned="$(mktemp)"
trap 'rm -rf -- "$temp_noncodesigned"' EXIT
(
cd "$outdir"
if [ -e inputs.SHA256SUMS ]; then
echo "${outname}: Including existent input SHA256SUMS"
cat inputs.SHA256SUMS >> "$outsigdir"/SHA256SUMS
fi
echo "${outname}: Hashing build outputs to produce SHA256SUMS"
files="$(find -L . -type f ! -iname '*.SHA256SUMS')"
if [ -n "$files" ]; then
cut -c3- <<< "$files" | env LC_ALL=C sort | xargs sha256sum >> "$outsigdir"/SHA256SUMS
if (( ${#noncodesigned_fragments[@]} )); then
cat "${noncodesigned_fragments[@]}" \
| sort -u \
| sort -k2 \
> "$temp_noncodesigned"
if [ -e noncodesigned.SHA256SUMS ]; then
# The SHA256SUMS already exists, make sure it's exactly what we
# expect, error out if not
if diff -u noncodesigned.SHA256SUMS "$temp_noncodesigned"; then
echo "A noncodesigned.SHA256SUMS file already exists for '${VERSION}' and is up-to-date."
else
echo "ERR: ${outname}: No outputs found in '${outdir}'"
shasum_already_exists noncodesigned.SHA256SUMS
exit 1
fi
)
if [ -z "$NO_SIGN" ]; then
echo "${outname}: Signing SHA256SUMS to produce SHA256SUMS.asc"
gpg --detach-sign --local-user "$gpg_key_name" --armor --output "$outsigdir"/SHA256SUMS.asc "$outsigdir"/SHA256SUMS
else
echo "${outname}: Not signing SHA256SUMS as \$NO_SIGN is not empty"
mv "$temp_noncodesigned" noncodesigned.SHA256SUMS
fi
echo ""
trap - ERR # Reset ERR trap
else
echo "ERR: No noncodesigned outputs found for '${VERSION}', exiting..."
exit 1
fi
done
if (( ${#outdirs_already_attested_to[@]} )); then
# ...so that we can print them out nicely in a warning message
cat << EOF
temp_codesigned="$(mktemp)"
trap 'rm -rf -- "$temp_codesigned"' EXIT
WARN: Signature directories from '$signer_name' already exist in the specified
guix.sigs repository for the following output directories and were
skipped:
if (( ${#codesigned_fragments[@]} )); then
# Note: all.SHA256SUMS attests to all of $sha256sum_fragments, but is
# not needed if there are no $codesigned_fragments
cat "${sha256sum_fragments[@]}" \
| sort -u \
| sort -k2 \
> "$temp_codesigned"
if [ -e codesigned.SHA256SUMS ]; then
# The SHA256SUMS already exists, make sure it's exactly what we
# expect, error out if not
if diff -u all.SHA256SUMS "$temp_codesigned"; then
echo "An all.SHA256SUMS file already exists for '${VERSION}' and is up-to-date."
else
shasum_already_exists all.SHA256SUMS
exit 1
fi
else
mv "$temp_codesigned" codesigned.SHA256SUMS
fi
else
# It is fine to have the codesigned outputs be missing (perhaps the
# detached codesigs have not been published yet), just print a log
# message instead of erroring out
echo "INFO: No codesigned outputs found for '${VERSION}', skipping..."
fi
EOF
for outdir in "${outdirs_already_attested_to[@]}"; do
echo " '${outdir}'"
echo " Corresponds to: '$(out_sig_dir "$outdir")'"
if [ -z "$NO_SIGN" ]; then
echo "Signing SHA256SUMS to produce SHA256SUMS.asc"
for i in *.SHA256SUMS; do
if [ ! -e "$i".asc ]; then
gpg --detach-sign \
--local-user "$gpg_key_name" \
--armor \
--output "$i".asc "$i"
else
echo "Signature already there"
fi
done
else
echo "Not signing SHA256SUMS as \$NO_SIGN is not empty"
fi
echo ""
done
fi
)

125
contrib/guix/guix-verify
View File

@ -56,58 +56,87 @@ cmd_usage
exit 1
fi
################
# We should be able to find at least one output
################
OUTSIGDIR_BASE="${GUIX_SIGS_REPO}/${VERSION}"
echo "Looking for output signature directories in '${OUTSIGDIR_BASE}'"
shopt -s nullglob
OUTSIGDIRS=( "$OUTSIGDIR_BASE"/* ) # This expands to an array of directories...
shopt -u nullglob
if (( ${#OUTSIGDIRS[@]} )); then
echo "Found output signature directories:"
for outsigdir in "${OUTSIGDIRS[@]}"; do
echo " '$outsigdir'"
done
echo
else
echo "ERR: Could not find any output signature directories in ${OUTSIGDIR_BASE}"
exit 1
fi
##############
## Verify ##
##############
# MAIN LOGIC: Loop through each output for VERSION and check that the SHA256SUMS
# and SHA256SUMS.asc file match between signers, using the first
# available signer as the arbitrary comparison base.
for outsigdir in "${OUTSIGDIRS[@]}"; do
echo "BEGIN: Checking output signatures for $(basename "$outsigdir")"
echo ""
signer_dirs=( "$outsigdir"/* ) # This expands to an array of directories...
compare_signer_dir="${signer_dirs[0]}" # ...we just want the first one
for current_signer_dir in "${signer_dirs[@]}"; do
if ! gpg --quiet --batch --verify "$current_signer_dir"/SHA256SUMS.asc "$current_signer_dir"/SHA256SUMS; then
echo "ERR: Failed to verify GPG signature in '${current_signer_dir}/SHA256SUMS.asc'"
echo ""
echo "Hint: Either the signature is invalid or the public key is missing"
echo ""
elif ! diff --report-identical "$compare_signer_dir"/SHA256SUMS "$current_signer_dir"/SHA256SUMS; then
echo "ERR: The SHA256SUMS attestation in these two directories differ:"
echo " '${compare_signer_dir}'"
echo " '${current_signer_dir}'"
echo ""
else
echo "Verified: '${current_signer_dir}'"
echo ""
fi
OUTSIGDIR_BASE="${GUIX_SIGS_REPO}/${VERSION}"
echo "Looking for signature directories in '${OUTSIGDIR_BASE}'"
echo ""
# Usage: verify compare_manifest current_manifest
verify() {
local compare_manifest="$1"
local current_manifest="$2"
if ! gpg --quiet --batch --verify "$current_manifest".asc "$current_manifest" 1>&2; then
echo "ERR: Failed to verify GPG signature in '${current_manifest}'"
echo ""
echo "Hint: Either the signature is invalid or the public key is missing"
echo ""
elif ! diff --report-identical "$compare_manifest" "$current_manifest" 1>&2; then
echo "ERR: The SHA256SUMS attestation in these two directories differ:"
echo " '${compare_manifest}'"
echo " '${current_manifest}'"
echo ""
else
echo "Verified: '${current_manifest}'"
echo ""
fi
}
shopt -s nullglob
all_noncodesigned=( "$OUTSIGDIR_BASE"/*/noncodesigned.SHA256SUMS )
shopt -u nullglob
echo "--------------------"
echo ""
if (( ${#all_noncodesigned[@]} )); then
compare_noncodesigned="${all_noncodesigned[0]}"
for current_manifest in "${all_noncodesigned[@]}"; do
verify "$compare_noncodesigned" "$current_manifest"
done
echo "DONE: Checking output signatures for $(basename "$outsigdir")"
echo "DONE: Checking output signatures for noncodesigned.SHA256SUMS"
echo ""
else
echo "WARN: No signature directories with noncodesigned.SHA256SUMS found"
echo ""
done
fi
shopt -s nullglob
all_all=( "$OUTSIGDIR_BASE"/*/all.SHA256SUMS )
shopt -u nullglob
echo "--------------------"
echo ""
if (( ${#all_all[@]} )); then
compare_all="${all_all[0]}"
for current_manifest in "${all_all[@]}"; do
verify "$compare_all" "$current_manifest"
done
# Sanity check: there should be no entries that exist in
# noncodesigned.SHA256SUMS that doesn't exist in all.SHA256SUMS
if [[ "$(comm -23 <(sort "$compare_noncodesigned") <(sort "$compare_all") | wc -c)" -ne 0 ]]; then
echo "ERR: There are unique lines in noncodesigned.SHA256SUMS which"
echo " do not exist in all.SHA256SUMS, something went very wrong."
exit 1
fi
echo "DONE: Checking output signatures for all.SHA256SUMS"
echo ""
else
echo "WARN: No signature directories with all.SHA256SUMS found"
echo ""
fi
echo "===================="
echo ""
if (( ${#all_noncodesigned[@]} + ${#all_all[@]} == 0 )); then
echo "ERR: Unable to perform any verifications as no signature directories"
echo " were found"
echo ""
exit 1
fi

23
contrib/guix/libexec/build.sh
View File

@ -230,20 +230,7 @@ if [ ! -e "$GIT_ARCHIVE" ]; then
git archive --prefix="${DISTNAME}/" --output="$GIT_ARCHIVE" HEAD
fi
# tmpdir="$(mktemp -d)"
# (
# cd "$tmpdir"
# mkdir -p inputs
# ln -sf --target-directory=inputs "$GIT_ARCHIVE"
# mkdir -p "$OUTDIR"
# find -L inputs -type f -print0 | xargs -0 sha256sum > "${OUTDIR}/inputs.SHA256SUMS"
# )
mkdir -p "$OUTDIR"
cat << EOF > "$OUTDIR"/inputs.SHA256SUMS
$(sha256sum "$GIT_ARCHIVE" | cut -d' ' -f1) inputs/$(basename "$GIT_ARCHIVE")
EOF
###########################
# Binary Tarball Building #
@ -451,3 +438,13 @@ mkdir -p "$DISTSRC"
rm -rf "$ACTUAL_OUTDIR"
mv --no-target-directory "$OUTDIR" "$ACTUAL_OUTDIR" \
|| ( rm -rf "$ACTUAL_OUTDIR" && exit 1 )
(
cd /outdir-base
{
echo "$GIT_ARCHIVE"
find "$ACTUAL_OUTDIR" -type f
} | xargs realpath --relative-base="$PWD" \
| xargs sha256sum \
| sponge "$ACTUAL_OUTDIR"/SHA256SUMS.part
)

15
contrib/guix/libexec/codesign.sh
View File

@ -55,10 +55,6 @@ if [ ! -e "$CODESIGNATURE_GIT_ARCHIVE" ]; then
fi
mkdir -p "$OUTDIR"
cat << EOF > "$OUTDIR"/inputs.SHA256SUMS
$(sha256sum "$UNSIGNED_TARBALL" | cut -d' ' -f1) inputs/$(basename "$UNSIGNED_TARBALL")
$(sha256sum "$CODESIGNATURE_GIT_ARCHIVE" | cut -d' ' -f1) inputs/$(basename "$CODESIGNATURE_GIT_ARCHIVE")
EOF
mkdir -p "$DISTSRC"
(
@ -103,3 +99,14 @@ mkdir -p "$DISTSRC"
rm -rf "$ACTUAL_OUTDIR"
mv --no-target-directory "$OUTDIR" "$ACTUAL_OUTDIR" \
|| ( rm -rf "$ACTUAL_OUTDIR" && exit 1 )
(
cd /outdir-base
{
echo "$UNSIGNED_TARBALL"
echo "$CODESIGNATURE_GIT_ARCHIVE"
find "$ACTUAL_OUTDIR" -type f
} | xargs realpath --relative-base="$PWD" \
| xargs sha256sum \
| sponge "$ACTUAL_OUTDIR"/SHA256SUMS.part
)

2
contrib/guix/manifest.scm
View File

@ -21,6 +21,7 @@
(gnu packages linux)
(gnu packages llvm)
(gnu packages mingw)
(gnu packages moreutils)
(gnu packages perl)
(gnu packages pkg-config)
(gnu packages python)
@ -549,6 +550,7 @@ inspecting signatures in Mach-O binaries.")
patch
gawk
sed
moreutils
;; Compression and archiving
tar
bzip2