aboutsummaryrefslogtreecommitdiffstats
path: root/tests
diff options
context:
space:
mode:
authorGuilhem Moulin <guilhem@fripost.org>2024-06-13 03:32:04 +0200
committerGuilhem Moulin <guilhem@fripost.org>2024-06-13 16:48:05 +0200
commit9cb882a468843bf8ce9598de8769d5baaaaae3ea (patch)
treee53a8783f8658bcf0d9778bc07037ec06e5b18f4 /tests
parentbf4d2d13ffcd894c6e7765dbd366f1163c69c9e1 (diff)
Fix post-issuance validation logic.
Rather than adding intermediates in the certificate bundle we now validate the leaf certificate with intermediates as untrusted (used for chain building only). Only the root certificates are used as trust anchor. Not pining intermediate certificates anymore is in line with Let's Encrypt's latest recommendations: Rotating the set of intermediates we issue from helps keep the Internet agile and more secure. It encourages automation and efficiency, and discourages outdated practices like key pinning. “Key Pinning” is a practice in which clients — either ACME clients getting certificates for their site, or apps connecting to their own backend servers — decide to trust only a single issuing intermediate certificate rather than delegating trust to the system trust store. Updating pinned keys is a manual process, which leads to an increased risk of errors and potential business continuity failures. — https://letsencrypt.org/2024/03/19/new-intermediate-certificates:
Diffstat (limited to 'tests')
-rw-r--r--tests/cert-install82
1 files changed, 53 insertions, 29 deletions
diff --git a/tests/cert-install b/tests/cert-install
index e24fe34..279309f 100644
--- a/tests/cert-install
+++ b/tests/cert-install
@@ -28,6 +28,55 @@ EOF
grepstderr -Fxq "[bad3] Warning: Couldn't generate CSR, skipping"
+check_spki() {
+ local p1="$1" p2="$2" s1 s2
+ s1="$(openssl x509 -in "$p1" -noout -pubkey \
+ | openssl pkey -pubin -outform DER \
+ | openssl dgst -sha256 \
+ | sed 's/.*=\s*//')"
+ s2="$(openssl pkey -in "$p2" -pubout -outform DER \
+ | openssl dgst -sha256 \
+ | sed 's/.*=\s*//')"
+ if [ -n "$s1" ] && [ "$s1" = "$s2" ]; then
+ return 0
+ else
+ printf "%s != %s\\n" "$s1" "$s2" >&2
+ return 1
+ fi
+}
+check_chain() {
+ local priv="$1" chain="$2" leaf="${3-}" pem0
+
+ csplit -f "${chain%.crt}.chain.pem" "$chain" \
+ "/-----BEGIN CERTIFICATE-----/" "{*}"
+
+ pem0="${chain%.crt}.chain.pem00"
+ if [ ! -s "$pem0" ]; then
+ # 00 is empty, leaf cert is at 01
+ rm -f -- "$pem0"
+ pem0="${chain%.crt}.chain.pem01"
+ fi
+ test -s "$pem0" || return 1
+ check_spki "$pem0" "$priv"
+
+ if [ -n "$leaf" ]; then
+ diff --ignore-blank-lines --unified "$pem0" "$leaf" || return 1
+ fi
+
+ leaf="${chain%.crt}.leaf.pem"
+ mv -T -- "$pem0" "$leaf"
+
+ intermediates="${chain%.crt}.intermediates.pem"
+ sed "/^$/d" "${chain%.crt}.chain.pem"[0-9]* >"$intermediates"
+ test -s "$intermediates" || return 1 # ensure there is at least one intermediate
+
+ openssl verify -trusted /usr/share/lacme/ca-certificates.crt \
+ -untrusted "$intermediates" \
+ -purpose sslserver -x509_strict \
+ -show_chain \
+ -- "$leaf" || return 1
+}
+
# 'certificate' installs only the leaf certificate
openssl genpkey -algorithm RSA -out /etc/lacme/test1.key
subject="/CN=$(head -c10 /dev/urandom | base32 -w0 | tr "A-Z" "a-z").$DOMAINNAME"
@@ -42,23 +91,9 @@ lacme newOrder test1 2>"$STDERR" || fail newOrder test1
test /etc/lacme/test1.crt -nt /etc/lacme/test1.key
sed -n "0,/^-----END CERTIFICATE-----$/ p" /etc/lacme/test1.crt >/etc/lacme/test1.pem
diff --unified /etc/lacme/test1.crt /etc/lacme/test1.pem
+check_spki /etc/lacme/test1.crt /etc/lacme/test1.key
-check_hash() {
- local p1="$1" p2 s1 s2
- s1="$(openssl x509 -in "$p1" -noout -hash)"
- for p2 in /usr/share/lacme/ca-certificates.pem.*; do
- s2="$(openssl x509 -in "$p2" -noout -hash)"
- if [ "$s1" = "$s2" ]; then
- return 0
- fi
- done
- return 1
-}
-csplit -f /usr/share/lacme/ca-certificates.pem. /usr/share/lacme/ca-certificates.crt \
- "/-----BEGIN CERTIFICATE-----/" "{*}"
-rm -f /usr/share/lacme/ca-certificates.pem.00
-
# 'certificate-chain' appends the chain of trust
openssl genpkey -algorithm RSA -out /etc/lacme/test2.key
cat >"/etc/lacme/lacme-certs.conf.d/test2.conf" <<- EOF
@@ -70,16 +105,7 @@ EOF
lacme newOrder test2 2>"$STDERR" || fail newOrder test2
test /etc/lacme/test2.crt -nt /etc/lacme/test2.key
-csplit -f /etc/lacme/test2.chain.pem /etc/lacme/test2.crt \
- "/-----BEGIN CERTIFICATE-----/" "{*}"
-test -s /etc/lacme/test2.chain.pem01 # leaf cert (00 is empty)
-rm -f /etc/lacme/test2.chain.pem0[01]
-test -s /etc/lacme/test2.chain.pem02 # depth 1
-
-# all certificates at depth >=1 must be in our CA bundle
-for p in /etc/lacme/test2.chain.pem*; do
- check_hash "$p"
-done
+check_chain /etc/lacme/test2.key /etc/lacme/test2.crt
# 'certificate' + 'certificate-chain'
openssl genpkey -algorithm RSA -out /etc/lacme/test3.key
@@ -94,10 +120,8 @@ EOF
lacme newOrder test3 2>"$STDERR" || fail newOrder test3
test /etc/lacme/test3.pem -nt /etc/lacme/test3.key
test /etc/lacme/test3.crt -nt /etc/lacme/test3.key
-csplit -f /etc/lacme/test3.chain.pem /etc/lacme/test3.crt \
- "/-----BEGIN CERTIFICATE-----/" "{*}"
-sed -i "/^$/d" /etc/lacme/test3.chain.pem*
-diff -q /etc/lacme/test3.chain.pem01 /etc/lacme/test3.pem
+check_chain /etc/lacme/test3.key /etc/lacme/test3.crt /etc/lacme/test3.pem
+
st="$(stat -c "%U:%G %#a" /etc/lacme/test3.pem)"
[ "$st" = "root:root 0644" ]
st="$(stat -c "%U:%G %#a" /etc/lacme/test3.crt)"