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notmuch/test/T350-crypto.sh
Daniel Kahn Gillmor 8c29a5da09 cli/show: produce "email" element in sigstatus 
When the certificate that signs a message is known to be valid, GMime
is capable of reporting on the e-mail address embedded in the
certificate.

We pass this information along to the caller of "notmuch show", as
often only the e-mail address of the certificate has actually been
checked/verified.

Furthermore, signature verification should probably at some point
compare the e-mail address of the caller against the sender address of
the message itself.  Having to parse what gmime thinks is a "userid"
to extract an e-mail address seems clunky and unnecessary if gmime
already thinks it knows what the e-mail address is.

See id:878s41ax6t.fsf@fifthhorseman.net for more motivation and discussion.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2021-06-26 13:07:47 -03:00

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#!/usr/bin/env bash
# TODO:
# - decryption/verification with signer key not available
# - verification of signatures from expired/revoked keys
test_description='PGP/MIME signature verification and decryption'
. $(dirname "$0")/test-lib.sh || exit 1
. $NOTMUCH_SRCDIR/test/test-lib-emacs.sh || exit 1
##################################################
test_require_emacs
add_gnupg_home
test_begin_subtest "emacs delivery of signed message"
test_expect_success \
'emacs_fcc_message \
"test signed message 001" \
"This is a test signed message." \
"(mml-secure-message-sign)"'
test_begin_subtest "signed part content-type indexing"
output=$(notmuch search mimetype:multipart/signed and mimetype:application/pgp-signature | notmuch_search_sanitize)
test_expect_equal "$output" "thread:XXX 2000-01-01 [1/1] Notmuch Test Suite; test signed message 001 (inbox signed)"
test_begin_subtest "signature verification"
output=$(notmuch show --format=json --verify subject:"test signed message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|g')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["inbox","signed"],
"crypto": {"signed": {"status": [{ "status": "good", "created": 946728000, "email": "'"$SELF_EMAIL"'", "fingerprint": "'$FINGERPRINT'", "userid": "'"$SELF_USERID"'"}]}},
"headers": {"Subject": "test signed message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"sigstatus": [{"status": "good",
"fingerprint": "'$FINGERPRINT'",
"created": 946728000,
"email": "'"$SELF_EMAIL"'",
"userid": "'"$SELF_USERID"'"}],
"content-type": "multipart/signed",
"content": [{"id": 2,
"content-type": "text/plain",
"content": "This is a test signed message.\n"},
{"id": 3,
"content-type": "application/pgp-signature",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
test_begin_subtest "detection of modified signed contents"
emacs_fcc_message \
"bad signed message 001" \
"Incriminating stuff. This is a test signed message." \
"(mml-secure-message-sign)"
file=$(notmuch search --output=files subject:"bad signed message 001")
sed -i 's/Incriminating stuff. //' ${file}
output=$(notmuch show --format=json --verify subject:"bad signed message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["inbox","signed"],
"crypto": {"signed": {"status": [{ "status": "bad", "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'"}]}},
"headers": {"Subject": "bad signed message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"sigstatus": [{"status": "bad",
"keyid": "'$(echo $FINGERPRINT | cut -c 25-)'"}],
"content-type": "multipart/signed",
"content": [{"id": 2,
"content-type": "text/plain",
"content": "This is a test signed message.\n"},
{"id": 3,
"content-type": "application/pgp-signature",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
test_begin_subtest "corrupted pgp/mime signature"
emacs_fcc_message \
"bad signed message 002" \
"Incriminating stuff. This is a test signed message." \
"(mml-secure-message-sign)"
file=$(notmuch search --output=files subject:"bad signed message 002")
awk '/-----BEGIN PGP SIGNATURE-----/{flag=1;print;next} \
/-----END PGP SIGNATURE-----/{flag=0;print;next} \
flag{gsub(/[A-Za-z]/,"0");print}!flag{print}' $file > $file.new
rm $file
mv $file.new $file
output=$(notmuch show --format=json --verify subject:"bad signed message 002" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
"crypto": {},
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["inbox","signed"],
"headers": {"Subject": "bad signed message 002",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"sigstatus": [],
"content-type": "multipart/signed",
"content": [{"id": 2,
"content-type": "text/plain",
"content": "Incriminating stuff. This is a test signed message.\n"},
{"id": 3,
"content-type": "application/pgp-signature",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
test_begin_subtest "signature verification without full user ID validity"
# give the key no owner trust, removes validity on all user IDs of the
# certificate in the absence of other trusted certifiers:
gpg --quiet --batch --no-tty --export-ownertrust > "$GNUPGHOME/ownertrust.bak"
echo "${FINGERPRINT}:3:" | gpg --quiet --batch --no-tty --import-ownertrust
output=$(notmuch show --format=json --verify subject:"test signed message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|g')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["inbox","signed"],
"crypto": {"signed": {"status": [{ "status": "good", "created": 946728000, "fingerprint": "'$FINGERPRINT'"}]}},
"headers": {"Subject": "test signed message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"sigstatus": [{"status": "good",
"fingerprint": "'$FINGERPRINT'",
"created": 946728000}],
"content-type": "multipart/signed",
"content": [{"id": 2,
"content-type": "text/plain",
"content": "This is a test signed message.\n"},
{"id": 3,
"content-type": "application/pgp-signature",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
gpg --quiet --batch --no-tty --import-ownertrust < "$GNUPGHOME/ownertrust.bak"
test_begin_subtest "signature verification with signer key unavailable"
# move the gnupghome temporarily out of the way
mv "${GNUPGHOME}"{,.bak}
output=$(notmuch show --format=json --verify subject:"test signed message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|g')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["inbox","signed"],
"crypto": {"signed": {"status": [{"errors": {"key-missing": true}, "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'", "status": "error"}]}},
"headers": {"Subject": "test signed message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"sigstatus": [{"status": "error",
"keyid": "'$(echo $FINGERPRINT | cut -c 25-)'",
"errors": {"key-missing": true}}],
"content-type": "multipart/signed",
"content": [{"id": 2,
"content-type": "text/plain",
"content": "This is a test signed message.\n"},
{"id": 3,
"content-type": "application/pgp-signature",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
mv "${GNUPGHOME}"{.bak,}
test_begin_subtest "emacs delivery of encrypted message with attachment"
# create a test encrypted message with attachment
cat <<EOF >TESTATTACHMENT
This is a test file.
EOF
test_expect_success \
'emacs_fcc_message \
"test encrypted message 001" \
"This is a test encrypted message.\n" \
"(mml-attach-file \"TESTATTACHMENT\") (mml-secure-message-encrypt)"'
test_begin_subtest "encrypted part content-type indexing"
output=$(notmuch search mimetype:multipart/encrypted and mimetype:application/pgp-encrypted and mimetype:application/octet-stream | notmuch_search_sanitize)
test_expect_equal "$output" "thread:XXX 2000-01-01 [1/1] Notmuch Test Suite; test encrypted message 001 (encrypted inbox)"
test_begin_subtest "decryption, --format=text"
output=$(notmuch show --format=text --decrypt=true subject:"test encrypted message 001" \
| notmuch_show_sanitize_all \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected=' message{ id:XXXXX depth:0 match:1 excluded:0 filename:XXXXX
header{
Notmuch Test Suite <test_suite@notmuchmail.org> (2000-01-01) (encrypted inbox)
Subject: test encrypted message 001
From: Notmuch Test Suite <test_suite@notmuchmail.org>
To: test_suite@notmuchmail.org
Date: Sat, 01 Jan 2000 12:00:00 +0000
header}
body{
part{ ID: 1, Content-type: multipart/encrypted
part{ ID: 2, Content-type: application/pgp-encrypted
Non-text part: application/pgp-encrypted
part}
part{ ID: 3, Content-type: multipart/mixed
part{ ID: 4, Content-type: text/plain
This is a test encrypted message.
part}
attachment{ ID: 5, Filename: TESTATTACHMENT, Content-type: application/octet-stream
Non-text part: application/octet-stream
attachment}
part}
part}
body}
message}'
test_expect_equal \
"$output" \
"$expected"
test_begin_subtest "decryption, --format=json"
output=$(notmuch show --format=json --decrypt=true subject:"test encrypted message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["encrypted","inbox"],
"crypto": {"decrypted": {"status": "full"}},
"headers": {"Subject": "test encrypted message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"encstatus": [{"status": "good"}],
"content-type": "multipart/encrypted",
"content": [{"id": 2,
"content-type": "application/pgp-encrypted",
"content-length": "NONZERO"},
{"id": 3,
"content-type": "multipart/mixed",
"content": [{"id": 4,
"content-type": "text/plain",
"content": "This is a test encrypted message.\n"},
{"id": 5,
"content-type": "application/octet-stream",
"content-disposition": "attachment",
"content-length": "NONZERO",
"content-transfer-encoding": "base64",
"filename": "TESTATTACHMENT"}]}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
test_begin_subtest "decryption, --format=json, --part=4"
output=$(notmuch show --format=json --part=4 --decrypt=true subject:"test encrypted message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='{"id": 4,
"content-type": "text/plain",
"content": "This is a test encrypted message.\n"}'
test_expect_equal_json \
"$output" \
"$expected"
test_begin_subtest "decrypt attachment (--part=5 --format=raw)"
notmuch show \
--format=raw \
--part=5 \
--decrypt=true \
subject:"test encrypted message 001" >OUTPUT
test_expect_equal_file TESTATTACHMENT OUTPUT
test_begin_subtest "decryption failure with missing key"
mv "${GNUPGHOME}"{,.bak}
output=$(notmuch show --format=json --decrypt=true subject:"test encrypted message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
"crypto": {},
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["encrypted","inbox"],
"headers": {"Subject": "test encrypted message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"encstatus": [{"status": "bad"}],
"content-type": "multipart/encrypted",
"content": [{"id": 2,
"content-type": "application/pgp-encrypted",
"content-length": "NONZERO"},
{"id": 3,
"content-type": "application/octet-stream",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
mv "${GNUPGHOME}"{.bak,}
test_begin_subtest "emacs delivery of encrypted + signed message"
test_expect_success \
'emacs_fcc_message \
"test encrypted message 002" \
"This is another test encrypted message.\n" \
"(mml-secure-message-sign-encrypt)"'
test_begin_subtest "decryption + signature verification"
output=$(notmuch show --format=json --decrypt=true subject:"test encrypted message 002" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|g')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["encrypted","inbox"],
"crypto": {"signed": {"status": [{ "status": "good", "created": 946728000, "fingerprint": "'$FINGERPRINT'", "email": "'"$SELF_EMAIL"'", "userid": "'"$SELF_USERID"'"}],
"encrypted": true },
"decrypted": {"status": "full"}},
"headers": {"Subject": "test encrypted message 002",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"encstatus": [{"status": "good"}],
"sigstatus": [{"status": "good",
"fingerprint": "'$FINGERPRINT'",
"created": 946728000,
"email": "'"$SELF_EMAIL"'",
"userid": "'"$SELF_USERID"'"}],
"content-type": "multipart/encrypted",
"content": [{"id": 2,
"content-type": "application/pgp-encrypted",
"content-length": "NONZERO"},
{"id": 3,
"content-type": "text/plain",
"content": "This is another test encrypted message.\n"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
test_begin_subtest "reply to encrypted message"
output=$(notmuch reply --decrypt=true subject:"test encrypted message 002" \
| notmuch_drop_mail_headers In-Reply-To References)
expected='From: Notmuch Test Suite <test_suite@notmuchmail.org>
Subject: Re: test encrypted message 002
To: test_suite@notmuchmail.org
On 01 Jan 2000 12:00:00 -0000, Notmuch Test Suite <test_suite@notmuchmail.org> wrote:
> This is another test encrypted message.'
test_expect_equal \
"$output" \
"$expected"
test_begin_subtest "Reply within emacs to an encrypted message"
test_emacs "(let ((message-hidden-headers '())
(notmuch-crypto-process-mime 't))
(notmuch-show \"subject:test.encrypted.message.002\")
(notmuch-show-reply)
(test-output))"
grep -v -e '^In-Reply-To:' -e '^References:' -e '^Fcc:' < OUTPUT > OUTPUT.clean
cat <<EOF >EXPECTED
From: Notmuch Test Suite <test_suite@notmuchmail.org>
To: test_suite@notmuchmail.org
Subject: Re: test encrypted message 002
--text follows this line--
<#secure method=pgpmime mode=signencrypt>
Notmuch Test Suite <test_suite@notmuchmail.org> writes:
> This is another test encrypted message.
EOF
test_expect_equal_file EXPECTED OUTPUT.clean
test_begin_subtest "signature verification with revoked key"
# generate revocation certificate and load it to revoke key
echo "y
1
Notmuch Test Suite key revocation (automated) $(date '+%F_%T%z')
y
" \
| gpg --no-tty --quiet --command-fd 0 --armor --gen-revoke "0x${FINGERPRINT}!" 2>/dev/null \
| gpg --no-tty --quiet --import
output=$(notmuch show --format=json --verify subject:"test signed message 001" \
| notmuch_json_show_sanitize \
| sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
"match": true,
"excluded": false,
"filename": ["YYYYY"],
"timestamp": 946728000,
"date_relative": "2000-01-01",
"tags": ["inbox","signed"],
"crypto": {"signed": {"status": [{"errors": {"key-revoked": true}, "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'", "status": "error"}]}},
"headers": {"Subject": "test signed message 001",
"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
"To": "test_suite@notmuchmail.org",
"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
"body": [{"id": 1,
"sigstatus": [{"status": "error",
"keyid": "6D92612D94E46381",
"errors": {"key-revoked": true}}],
"content-type": "multipart/signed",
"content": [{"id": 2,
"content-type": "text/plain",
"content": "This is a test signed message.\n"},
{"id": 3,
"content-type": "application/pgp-signature",
"content-length": "NONZERO"}]}]},
[]]]]'
test_expect_equal_json \
"$output" \
"$expected"
test_done
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