#!/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'
. ./test-lib.sh

# GnuPG is a prereq.
test_expect_success "prereq: GnuPG is present" "which gpg" \
    && test_set_prereq GPG


add_gnupg_home ()
{
    local output
    [ -d ${GNUPGHOME} ] && return
    mkdir -m 0700 "$GNUPGHOME"
    gpg --no-tty --import <$TEST_DIRECTORY/gnupg-secret-key.asc >"$GNUPGHOME"/import.log 2>&1
    test_debug "cat $GNUPGHOME/import.log"
    if (gpg --quick-random --version >/dev/null 2>&1) ; then
	echo quick-random >> "$GNUPGHOME"/gpg.conf
    elif (gpg --debug-quick-random --version >/dev/null 2>&1) ; then
	echo debug-quick-random >> "$GNUPGHOME"/gpg.conf
    fi
}

##################################################

add_gnupg_home
# get key fingerprint
FINGERPRINT=$(gpg --no-tty --list-secret-keys --with-colons --fingerprint | grep '^fpr:' | cut -d: -f10)

# for some reason this is needed for emacs_deliver_message to work,
# although I can't figure out why
add_email_corpus

test_expect_success GPG 'emacs delivery of signed message' \
'emacs_deliver_message \
    "test signed message 001" \
    "This is a test signed message." \
    "(mml-secure-message-sign)"'

test_begin_subtest "signature verification"
output=$(notmuch show --format=json --verify subject:"test signed message 001" \
    | notmuch_json_show_sanitize \
    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
 "match": true,
 "filename": "YYYYY",
 "timestamp": 946728000,
 "date_relative": "2000-01-01",
 "tags": ["inbox","signed"],
 "headers": {"Subject": "test signed message 001",
 "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
 "To": "test_suite@notmuchmail.org",
 "Cc": "",
 "Bcc": "",
 "Date": "01 Jan 2000 12:00:00 -0000"},
 "body": [{"id": 1,
 "sigstatus": [{"status": "good",
 "fingerprint": "'$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"}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"

test_begin_subtest "signature verification with full owner trust"
# give the key full owner trust
echo "${FINGERPRINT}:6:" | gpg --no-tty --import-ownertrust >>"$GNUPGHOME"/trust.log 2>&1
gpg --no-tty --check-trustdb >>"$GNUPGHOME"/trust.log 2>&1
output=$(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,
 "filename": "YYYYY",
 "timestamp": 946728000,
 "date_relative": "2000-01-01",
 "tags": ["inbox","signed"],
 "headers": {"Subject": "test signed message 001",
 "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
 "To": "test_suite@notmuchmail.org",
 "Cc": "",
 "Bcc": "",
 "Date": "01 Jan 2000 12:00:00 -0000"},
 "body": [{"id": 1,
 "sigstatus": [{"status": "good",
 "fingerprint": "'$FINGERPRINT'",
 "created": 946728000,
 "userid": " Notmuch Test Suite <test_suite@notmuchmail.org> (INSECURE!)"}],
 "content-type": "multipart/signed",
 "content": [{"id": 2,
 "content-type": "text/plain",
 "content": "This is a test signed message.\n"},
 {"id": 3,
 "content-type": "application/pgp-signature"}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"

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|')
expected='[[[{"id": "XXXXX",
 "match": true,
 "filename": "YYYYY",
 "timestamp": 946728000,
 "date_relative": "2000-01-01",
 "tags": ["inbox","signed"],
 "headers": {"Subject": "test signed message 001",
 "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
 "To": "test_suite@notmuchmail.org",
 "Cc": "",
 "Bcc": "",
 "Date": "01 Jan 2000 12:00:00 -0000"},
 "body": [{"id": 1,
 "sigstatus": [{"status": "error",
 "keyid": "'$(echo $FINGERPRINT | cut -c 25-)'",
 "errors": 2}],
 "content-type": "multipart/signed",
 "content": [{"id": 2,
 "content-type": "text/plain",
 "content": "This is a test signed message.\n"},
 {"id": 3,
 "content-type": "application/pgp-signature"}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"
mv "${GNUPGHOME}"{.bak,}

# create a test encrypted message with attachment
cat <<EOF >TESTATTACHMENT
This is a test file.
EOF
test_expect_success GPG 'emacs delivery of encrypted message with attachment' \
'emacs_deliver_message \
    "test encrypted message 001" \
    "This is a test encrypted message.\n" \
    "(mml-attach-file \"TESTATTACHMENT\") (mml-secure-message-encrypt)"'

test_begin_subtest "decryption, --format=text"
output=$(notmuch show --format=text --decrypt subject:"test encrypted message 001" \
    | notmuch_show_sanitize_all \
    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='\fmessage{ id:XXXXX depth:0 match:1 filename:XXXXX
\fheader{
Notmuch Test Suite <test_suite@notmuchmail.org> (2000-01-01) (encrypted inbox)
Subject: test encrypted message 001
From: Notmuch Test Suite <test_suite@notmuchmail.org>
To: test_suite@notmuchmail.org
Date: 01 Jan 2000 12:00:00 -0000
\fheader}
\fbody{
\fpart{ ID: 1, Content-type: multipart/encrypted
\fpart{ ID: 2, Content-type: application/pgp-encrypted
Non-text part: application/pgp-encrypted
\fpart}
\fpart{ ID: 3, Content-type: multipart/mixed
\fpart{ ID: 4, Content-type: text/plain
This is a test encrypted message.
\fpart}
\fattachment{ ID: 5, Filename: TESTATTACHMENT, Content-type: application/octet-stream
Non-text part: application/octet-stream
\fattachment}
\fpart}
\fpart}
\fbody}
\fmessage}'
test_expect_equal GPG \
    "$output" \
    "$expected"

test_begin_subtest "decryption, --format=json"
output=$(notmuch show --format=json --decrypt subject:"test encrypted message 001" \
    | notmuch_json_show_sanitize \
    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
 "match": true,
 "filename": "YYYYY",
 "timestamp": 946728000,
 "date_relative": "2000-01-01",
 "tags": ["encrypted","inbox"],
 "headers": {"Subject": "test encrypted message 001",
 "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
 "To": "test_suite@notmuchmail.org",
 "Cc": "",
 "Bcc": "",
 "Date": "01 Jan 2000 12:00:00 -0000"},
 "body": [{"id": 1,
 "encstatus": [{"status": "good"}],
 "sigstatus": [],
 "content-type": "multipart/encrypted",
 "content": [{"id": 2,
 "content-type": "application/pgp-encrypted"},
 {"id": 3,
 "content-type": "multipart/mixed",
 "content": [{"id": 4,
 "content-type": "text/plain",
 "content": "This is a test encrypted message.\n"},
 {"id": 5,
 "content-type": "application/octet-stream",
 "filename": "TESTATTACHMENT"}]}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"

test_begin_subtest "decryption, --format=json, --part=4"
output=$(notmuch show --format=json --part=4 --decrypt subject:"test encrypted message 001" \
    | notmuch_json_show_sanitize \
    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='{"id": 4,
 "content-type": "text/plain",
 "content": "This is a test encrypted message.\n"}'
test_expect_equal GPG \
    "$output" \
    "$expected"

test_begin_subtest "decrypt attachment (--part=5 --format=raw)"
notmuch show \
    --format=raw \
    --part=5 \
    --decrypt \
    subject:"test encrypted message 001" >OUTPUT
test_expect_equal_file GPG OUTPUT TESTATTACHMENT

test_begin_subtest "decryption failure with missing key"
mv "${GNUPGHOME}"{,.bak}
output=$(notmuch show --format=json --decrypt subject:"test encrypted message 001" \
    | notmuch_json_show_sanitize \
    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
 "match": true,
 "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",
 "Cc": "",
 "Bcc": "",
 "Date": "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"},
 {"id": 3,
 "content-type": "application/octet-stream"}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"
mv "${GNUPGHOME}"{.bak,}

test_expect_success GPG 'emacs delivery of encrypted + signed message' \
'emacs_deliver_message \
    "test encrypted message 002" \
    "This is another test encrypted message.\n" \
    "(mml-secure-message-sign-encrypt)"'

test_begin_subtest "decryption + signature verification"
output=$(notmuch show --format=json --decrypt subject:"test encrypted message 002" \
    | notmuch_json_show_sanitize \
    | sed -e 's|"created": [1234567890]*|"created": 946728000|')
expected='[[[{"id": "XXXXX",
 "match": true,
 "filename": "YYYYY",
 "timestamp": 946728000,
 "date_relative": "2000-01-01",
 "tags": ["encrypted","inbox"],
 "headers": {"Subject": "test encrypted message 002",
 "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
 "To": "test_suite@notmuchmail.org",
 "Cc": "",
 "Bcc": "",
 "Date": "01 Jan 2000 12:00:00 -0000"},
 "body": [{"id": 1,
 "encstatus": [{"status": "good"}],
 "sigstatus": [{"status": "good",
 "fingerprint": "'$FINGERPRINT'",
 "created": 946728000,
 "userid": " Notmuch Test Suite <test_suite@notmuchmail.org> (INSECURE!)"}],
 "content-type": "multipart/encrypted",
 "content": [{"id": 2,
 "content-type": "application/pgp-encrypted"},
 {"id": 3,
 "content-type": "text/plain",
 "content": "This is another test encrypted message.\n"}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"

test_begin_subtest "reply to encrypted message"
output=$(notmuch reply --decrypt subject:"test encrypted message 002" \
    | grep -v -e '^In-Reply-To:' -e '^References:')
expected='From: Notmuch Test Suite <test_suite@notmuchmail.org>
Subject: Re: test encrypted message 002

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 GPG \
    "$output" \
    "$expected"

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,
 "filename": "YYYYY",
 "timestamp": 946728000,
 "date_relative": "2000-01-01",
 "tags": ["inbox","signed"],
 "headers": {"Subject": "test signed message 001",
 "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
 "To": "test_suite@notmuchmail.org",
 "Cc": "",
 "Bcc": "",
 "Date": "01 Jan 2000 12:00:00 -0000"},
 "body": [{"id": 1,
 "sigstatus": [{"status": "error",
 "keyid": "6D92612D94E46381",
 "errors": 8}],
 "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"}]}]},
 []]]]'
test_expect_equal GPG \
    "$output" \
    "$expected"

test_done