test: add broken S/MIME signature verification test for notmuch CLI

The test is pretty much cut and paste from the PGP/MIME version, with
obvious updates taken from notmuch output.  This also requires setting
up gpgsm infrastucture.

test/T355-smime.sh

@@ -3,6 +3,17 @@
 test_description='S/MIME signature verification and decryption'
 . ./test-lib.sh || exit 1
 
+add_gpgsm_home ()
+{
+    local fpr
+    [ -d ${GNUPGHOME} ] && return
+    mkdir -m 0700 "$GNUPGHOME"
+    gpgsm --no-tty --no-common-certs-import --disable-dirmngr --import < $TEST_DIRECTORY/smime/test.crt >"$GNUPGHOME"/import.log 2>&1
+    fpr=$(gpgsm  --list-key test_suite@notmuchmail.org | sed -n 's/.*fingerprint: //p')
+    echo "$fpr S relax" >> $GNUPGHOME/trustlist.txt
+    test_debug "cat $GNUPGHOME/import.log"
+}
+
 test_require_external_prereq openssl
 test_require_external_prereq gpgsm
 
@@ -10,6 +21,8 @@ cp $TEST_DIRECTORY/smime/key+cert.pem test_suite.pem
 
 FINGERPRINT=$(openssl x509 -fingerprint -in test_suite.pem -noout | sed -e 's/^.*=//' -e s/://g)
 
+add_gpgsm_home
+
 test_expect_success 'emacs delivery of S/MIME signed message' \
      'emacs_fcc_message \
      "test signed message 001" \
@@ -30,6 +43,42 @@ Verification successful
 EOF
 test_expect_equal_file EXPECTED OUTPUT
 
+test_begin_subtest "signature verification (notmuch CLI)"
+test_subtest_known_broken
+output=$(notmuch show --format=json --verify subject:"test signed message 001" \
+    | notmuch_json_show_sanitize \
+    | sed -e 's|"created": [-1234567890]*|"created": 946728000|' \
+	  -e 's|"expires": [-1234567890]*|"expires": 424242424|' )
+expected='[[[{"id": "XXXXX",
+ "match": true,
+ "excluded": false,
+ "filename": "YYYYY",
+ "timestamp": 946728000,
+ "date_relative": "2000-01-01",
+ "tags": ["inbox","signed"],
+ "headers": {"Subject": "test signed message 001",
+ "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
+ "To": "test_suite@notmuchmail.org",
+ "Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
+ "body": [{"id": 1,
+ "sigstatus": [{"status": "good",
+ "fingerprint": "'$FINGERPRINT'",
+ "expires": 424242424,
+ "created": 946728000}],
+ "content-type": "multipart/signed",
+ "content": [{"id": 2,
+ "content-type": "text/plain",
+ "content": "This is a test signed message.\n"},
+ {"id": 3,
+  "content-length": 1922,
+  "content-transfer-encoding": "base64",
+  "content-type": "application/x-pkcs7-signature",
+  "filename": "smime.p7s"}]}]},
+ []]]]'
+test_expect_equal_json \
+    "$output" \
+    "$expected"
+
 test_begin_subtest "Decryption and signature verification (openssl)"
 notmuch show --format=raw subject:"test encrypted message 001" |\
     openssl smime -decrypt -recip test_suite.pem |\

test/test-lib.sh

@@ -1334,4 +1334,5 @@ test_declare_external_prereq ${TEST_EMACSCLIENT}
 test_declare_external_prereq gdb
 test_declare_external_prereq gpg
 test_declare_external_prereq openssl
+test_declare_external_prereq gpgsm
 test_declare_external_prereq ${NOTMUCH_PYTHON}