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test: protected headers should work when both encrypted and signed.

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Up to this point, we've tested protected headers on messages that have
either been encrypted or signed, but not both.

This adds a couple tests of signed+encrypted messages, one where the
subject line is masked (outside subject line is "Subject Unavailable")
and another where it is not (outside Subject: matches inner Subject:)

See the discussion at
https://dkg.fifthhorseman.net/blog/e-mail-cryptography.html#protected-headers
for more details about the nuances between signed, stripped, and
stubbed headers.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
This commit is contained in:
Daniel Kahn Gillmor 2019-05-26 18:16:04 -04:00 committed by David Bremner
parent 5c3a44681f
commit b36248a26e
3 changed files with 84 additions and 0 deletions
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16
test/T356-protected-headers.sh
View file

@ -99,4 +99,20 @@ output=$(notmuch search --format=json 'id:protected-header@crypto.notmuchmail.or
test_json_nodes <<<"$output" \ test_json_nodes <<<"$output" \
'subject:[0]["subject"]="This is a protected header"' 'subject:[0]["subject"]="This is a protected header"'
test_begin_subtest "verify protected header is both signed and encrypted"
output=$(notmuch show --decrypt=true --format=json id:encrypted-signed@crypto.notmuchmail.org)
test_json_nodes <<<"$output" \
'crypto:[0][0][0]["crypto"]={
"signed":{"status": [{"status": "good", "fingerprint": "'$FINGERPRINT'", "userid": "'"$SELF_USERID"'", "created": 1525812676}],
"encrypted": true, "headers": ["Subject"]},"decrypted": {"status": "full", "header-mask": {"Subject": "Subject Unavailable"}}}' \
'subject:[0][0][0]["headers"]["Subject"]="Rhinoceros dinner"'
test_begin_subtest "verify protected header is signed even when not masked"
output=$(notmuch show --decrypt=true --format=json id:encrypted-signed-not-masked@crypto.notmuchmail.org)
test_json_nodes <<<"$output" \
'crypto:[0][0][0]["crypto"]={
"signed":{"status": [{"status": "good", "fingerprint": "'$FINGERPRINT'", "userid": "'"$SELF_USERID"'", "created": 1525812676}],
"encrypted": true, "headers": ["Subject"]},"decrypted": {"status": "full"}}' \
'subject:[0][0][0]["headers"]["Subject"]="Rhinoceros dinner"'
test_done test_done

34
test/corpora/protected-headers/encrypted-signed-not-masked.eml Normal file
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@ -0,0 +1,34 @@
From: test_suite@notmuchmail.org
To: test_suite@notmuchmail.org
Subject: Rhinoceros dinner
Date: Sat, 01 Jan 2000 12:00:00 +0000
Message-ID: <encrypted-signed-not-masked@crypto.notmuchmail.org>
MIME-Version: 1.0
Content-Type: multipart/encrypted; boundary="=-=-=";
protocol="application/pgp-encrypted"
--=-=-=
Content-Type: application/pgp-encrypted
Version: 1
--=-=-=
Content-Type: application/octet-stream
-----BEGIN PGP MESSAGE-----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=om0O
-----END PGP MESSAGE-----
--=-=-=--

34
test/corpora/protected-headers/encrypted-signed.eml Normal file
View file

@ -0,0 +1,34 @@
From: test_suite@notmuchmail.org
To: test_suite@notmuchmail.org
Subject: Subject Unavailable
Date: Sat, 01 Jan 2000 12:00:00 +0000
Message-ID: <encrypted-signed@crypto.notmuchmail.org>
MIME-Version: 1.0
Content-Type: multipart/encrypted; boundary="=-=-=";
protocol="application/pgp-encrypted"
--=-=-=
Content-Type: application/pgp-encrypted
Version: 1
--=-=-=
Content-Type: application/octet-stream
-----BEGIN PGP MESSAGE-----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=om0O
-----END PGP MESSAGE-----
--=-=-=--