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#!/bin/bash
# This script aims to run gpg in a number of standard ways to try to
# ensure that by default it only generates OpenPGP-compatible
# artifacts.
# Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
# License: GPL-3+
if [ -n "$AUTOPKGTEST_ARTIFACTS" ]; then
WORKDIR="$AUTOPKGTEST_ARTIFACTS/workdir"
mkdir -p "$WORKDIR" || exit 1
else
WORKDIR=$(mktemp -d)
cleanup() {
rm -rf "$WORKDIR"
}
trap cleanup EXIT
fi
errors=''
add_error() {
printf "FAILURE: %s\n" "$@" >&2
errors="$errors$*
"
}
GPG() {
# printf "GPG: %s\n" "$@"
gpg --no-tty --pinentry-mode loopback --quiet --passphrase '' --batch --fixed-list-mode "$@"
}
mkdir "$WORKDIR/certs"
# generate keys in a dedicated homedir:
genkey() {
local profile="$1"
local expected="$2"
local GNUPGHOME="$WORKDIR/$profile"
export GNUPGHOME
mkdir -p -m 0700 "$GNUPGHOME"
if [[ "$profile" =~ default ]]; then
algo="$profile"
# this is a dummy placeholder:
extra_arg="--fixed-list-mode"
else
algo="default"
extra_arg="--default-new-key-algo=$profile"
fi
if GPG "$extra_arg" --quick-gen-key "$profile" "$algo"; then
if [ "$expected" = "fail" ]; then
add_error "Should have failed to generate key $1"
return
fi
fprs=$(GPG --list-keys | awk -F: '/^fpr:/{print $10 }')
for fpr in $fprs; do
fprlen=$(printf "%s" "$fpr" | wc -c)
if [ "$fprlen" -ne 40 ]; then
add_error "Generated fingerprint ($fpr) should have had 40 chars, got $fprlen"
fi
done
mkdir -p "$(dirname "$WORKDIR/certs/$profile.cert")"
GPG --export > "$WORKDIR/certs/$profile.cert"
else
if [ "$expected" != "fail" ]; then
add_error "Should not have failed when generating $1"
fi
fi
}
# this is really gross and unprincipled. We treat the output of
# --list-packets as a machine-readable format, which upstream always
# says we should not do. Alas, without better inspection tooling
# (which probably means an external dependency), this is the best i
# can do for now.
test_generated_key() {
local profile="$1"
local GNUPGHOME="$WORKDIR/$profile"
export GNUPGHOME
local dump="$WORKDIR/dumps/$profile.dump"
mkdir -p "$(dirname "$dump")"
GPG --list-packets > "$dump" < "$WORKDIR/certs/$profile.cert"
# FIXME Verify: that no advertising preferences for the
# LibrePGP bits are set on the new certs
# no 'version 4'
# known hashed subpackets:
# 2 (sig created)
# 9 (key expires)
# 11 (pref-sym-algos)
# 21 (pref-hash-algos)
# 22 (pref-zip-algos)
# 23 (keyserver preferences) -- accept only 80 (no-modify)
# 27 (key flags) -- accept only 03 (SC) and 0C (E)
# 30 (features) -- accept only 01 (v1 SEIPD)
# 33 (issuer fpr) -- look for v4
# Outright reject:
# 34 (pref-aead-algos)
local unknown_subpacket_types="$( < "$dump" awk '/hashed subpkt/ { print $3 }' | sort -n | uniq | egrep -v '^(2|9|11|21|22|23|27|30|33)$' )"
for p in $unknown_subpacket_types; do
add_error "Unknown Hashed Subpacket type $p emitted by profile $profile"
done
local bad_key_flags="$( < "$dump" awk '/hashed subpkt 27/ { print $8 }' | sort | uniq | egrep -v '^(03\)|0C\))$' )"
for k in $bad_key_flags; do
add_error "Unexpected key flags settings $k by profile $profile"
done
local bad_features="$( < "$dump" awk '/hashed subpkt 30/ { print $7 }' | sort | uniq | egrep -v '^01\)$' )"
for f in $bad_features; do
add_error "Unexpected feature flags $f by profile $profile"
done
local bad_fpr_versions="$(< "$dump" awk '/hashed subpkt 33/ { print $8 }' | sort | uniq | egrep -v '^v4$' )"
for f in $bad_fpr_versions; do
add_error "Unexpected issuer fingerprint $f by profile $profile"
done
local bad_versions="$(< "$dump" awk '/^[[:space:]]*version/ { print $2 }' | sort | uniq | egrep -v '^4,$')"
for f in $bad_versions; do
add_error "unexpected version $f in profile $profile"
done
}
librepgp() {
local profile="$1"
local GNUPGHOME="$WORKDIR/librepgp-$profile"
export GNUPGHOME
mkdir -p -m 0700 "$GNUPGHOME"
if [[ "$profile" =~ default ]]; then
algo="$profile"
# this is a dummy placeholder:
extra_arg="--fixed-list-mode"
else
algo="default"
extra_arg="--default-new-key-algo=$profile"
fi
if ! GPG --compliance=gnupg "$extra_arg" --quick-gen-key "librepgp-$profile" "$algo"; then
add_error "Failed to generate --compliance=gnupg $profile"
return
fi
mkdir -p "$(dirname "$WORKDIR/certs/librepgp-$profile.cert")"
GPG --export "$profile" > "$WORKDIR/certs/librepgp-$profile.cert"
}
# try encrypting to keys with LibrePGP settings set.
test_encrypt() {
local profile="$1"
local GNUPGHOME="$WORKDIR/default"
export GNUPGHOME
GPG --import < "$WORKDIR/certs/librepgp-$profile.cert"
# --- OpenPGP encryption output
# +++ LibrePGP encryption output
# @@ -2,7 +2,6 @@
# :pubkey enc packet: version 3, algo 18, keyid XXXX
# data: [263 bits]
# data: [392 bits]
# -# off=96 ctb=d2 tag=18 hlen=2 plen=64 new-ctb
# -:encrypted data packet:
# - length: 64
# - mdc_method: 2
# +# off=96 ctb=d4 tag=20 hlen=2 plen=74 new-ctb
# +:aead encrypted packet: cipher=9 aead=2 cb=16
# + length: 74
# diff -u <(echo test | GPG --trust-model=always -r "librepgp-$profile" --encrypt | GPG --list-packets) \
# <(echo test | GPG --trust-model=always --compliance=gnupg -r "librepgp-$profile" --encrypt | GPG --list-packets)
if echo test | GPG --trust-model=always -r "librepgp-$profile" --encrypt | \
GPG --list-packets 2>/dev/null | grep ':aead encrypted packet:'; then
add_error "generated AEAD packets when encrypting to librepgp-$profile"
fi
}
test_symmetric_encryption() {
mkdir -m 0700 -p "$WORKDIR/symmetric"
local GNUPGHOME="$WORKDIR/symmetric"
export GNUPGHOME
if echo test | GPG --passphrase abc123 "$@" --symmetric | \
GPG --list-packets 2>/dev/null | grep ':aead encrypted packet:'; then
add_error "generated AEAD packets from ($* --symmetric)"
fi
}
for x in default future-default rsa3072+rsa3072 ed25519+cv25519; do
genkey "$x" succeed
test_generated_key "$x"
done
for x in ed448 ed25519/v5+cv25519/v5 rsa/v5+rsa/v5; do
genkey "$x" fail
done
for x in default future-default ed25519/v5+cv25519/v5 ed448+cv448; do
librepgp "$x"
# uncomment the lines below to see non-OpenPGP artifacts produces with --compliance=gnupg
# test_generated_key "librepgp-$x"
test_encrypt "$x"
done
test_symmetric_encryption
test_symmetric_encryption --compliance=gnupg
if [ -n "$errors" ]; then
printf "=== Errors ====\n%s" "$errors"
exit 1
fi
printf "Success!\n"
|
