From 045d169339c5b973f0924269e6ca485e48de3668 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Mon, 22 Feb 2021 20:32:33 +0100
Subject: lacme-accountd: Refuse to sign JWS with an invalid Protected Header.
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“The JWS Protected Header is a JSON object” — RFC 7515 sec. 2.

“The JWS Protected Header MUST include the following fields:
    - "alg"
    - "nonce"
    - "url"
    - either "jwk" or "kid"”
 — RFC 8555 sec. 6.2.
---
 tests/accountd-validate | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 tests/accountd-validate

(limited to 'tests')

diff --git a/tests/accountd-validate b/tests/accountd-validate
new file mode 100644
index 0000000..d4be5ee
--- /dev/null
+++ b/tests/accountd-validate
@@ -0,0 +1,36 @@
+# JWS Signing Input (RFC 7515) validation
+
+# missing or empty protected header
+printf "\\r\\n" | lacme-accountd --stdio 2>"$STDERR"
+grepstderr -Fq "] NOSIGN [malformed JWS Protected Header]"
+printf ".foo\\r\\n" | lacme-accountd --stdio 2>"$STDERR"
+grepstderr -Fq "] NOSIGN [malformed JWS Protected Header]"
+
+# invalid base64url-encoded protected header
+printf "foo/bar.baz\\r\\n" | lacme-accountd --stdio 2>"$STDERR"
+grepstderr -Fq "] NOSIGN [malformed JWS Protected Header]"
+
+# missing payload
+printf "foo\\r\\n" | lacme-accountd --stdio 2>"$STDERR"
+grepstderr -Fq "] NOSIGN [malformed JWS Payload]"
+
+# invalid base64url-encoded payload
+printf "foo.bar/baz\\r\\n" | lacme-accountd --stdio 2>"$STDERR"
+grepstderr -Fq "] NOSIGN [malformed JWS Payload]"
+
+# invalid JWS Protected Header: not a JSON object; missing fields "alg",
+# "nonce", "url", or either "jwk" or "kid"
+for s in "null" "\"str\"" "{}" "{\"alg\":\"\",\"nonce\":\"\",\"url\":\"\"}" "{\"jwk\":{}}"; do
+    s="$(printf "%s" "$s" | base64 -w0 | sed "s/=*$//" | tr "+/" "-_")"
+    printf "%s.\\r\\n" "$s" | lacme-accountd --stdio 2>"$STDERR"
+    grepstderr -F "] NOSIGN [invalid JWS Protected Header]"
+done
+
+# valid JWS Protected Header and Payload
+h="{\"alg\":\"\",\"nonce\":\"\",\"url\":\"\",\"jwk\":{}}"
+s="$(printf "%s" "$h" | base64 -w0 | sed "s/=*$//" | tr "+/" "-_")"
+p="$(printf "%s" "JWS Payload" | base64 -w0 | sed "s/=*$//" | tr "+/" "-_")"
+printf "%s.%s\\r\\n" "$s" "$p" | lacme-accountd --stdio 2>"$STDERR"
+grepstderr -F "] SIGNED header=base64url($h) playload=base64url(JWS Payload)"
+
+# vim: set filetype=sh :
-- 
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