[PATCH 4/9] cli/show: If a leaf part has children, show them instead of omitting

[Daniel Kahn Gillmor]

Until we did PKCS#7 unwrapping, no leaf MIME part could have a child.

Now, we treat the unwrapped MIME part as the child of the PKCS#7
SignedData object.  So in that case, we want to show it instead of
deliberately omitting the content.

This fixes the test of the protected subject in
id:smime-onepart-signed at protected-headers.example.

Signed-off-by: Daniel Kahn Gillmor <dkg at fifthhorseman.net>
---
 notmuch-show.c                 | 11 ++++++++++-
 test/T355-smime.sh             |  2 --
 test/T356-protected-headers.sh |  1 -
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/notmuch-show.c b/notmuch-show.c
index ab1cd144..36265043 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -759,7 +759,16 @@ format_part_sprinter (const void *ctx, sprinter_t *sp, mime_node_t *node,
 	    sp->string_len (sp, (char *) part_content->data, part_content->len);
 	    g_object_unref (stream_memory);
 	} else {
-	    format_omitted_part_meta_sprinter (sp, meta, GMIME_PART (node->part));
+	    /* if we have a child part despite being a standard
+	     * (non-multipart) MIME part, that means there is
+	     * something to unwrap, which we will present in
+	     * content: */
+	    if (node->nchildren) {
+		sp->map_key (sp, "content");
+		sp->begin_list (sp);
+		nclose = 1;
+	    } else
+		format_omitted_part_meta_sprinter (sp, meta, GMIME_PART (node->part));
 	}
     } else if (GMIME_IS_MULTIPART (node->part)) {
 	sp->map_key (sp, "content");
diff --git a/test/T355-smime.sh b/test/T355-smime.sh
index 710e51ec..099a3df7 100755
--- a/test/T355-smime.sh
+++ b/test/T355-smime.sh
@@ -177,12 +177,10 @@ On Tue, 26 Nov 2019 20:11:29 -0400, Alice Lovelace <alice at smime.example> wrote:
 test_expect_equal "$expected" "$output"
 
 test_begin_subtest "show PKCS#7 SignedData outputs valid JSON"
-test_subtest_known_broken
 output=$(notmuch show --format=json id:smime-onepart-signed at protected-headers.example)
 test_valid_json "$output"
 
 test_begin_subtest "Verify signature on PKCS#7 SignedData message"
-test_subtest_known_broken
 output=$(notmuch show --format=json id:smime-onepart-signed at protected-headers.example)
 test_json_nodes <<<"$output" \
                 'crypto:[0][0][0]["crypto"]["signed"]["status"][0]={
diff --git a/test/T356-protected-headers.sh b/test/T356-protected-headers.sh
index 520cb71c..bca50e29 100755
--- a/test/T356-protected-headers.sh
+++ b/test/T356-protected-headers.sh
@@ -157,7 +157,6 @@ test_expect_equal "$output" id:protected-with-legacy-display at crypto.notmuchmail.
 
 for variant in multipart-signed onepart-signed; do
     test_begin_subtest "verify signed PKCS#7 subject ($variant)"
-    [ "$variant" = multipart-signed ] || test_subtest_known_broken
     output=$(notmuch show --verify --format=json "id:smime-${variant}@protected-headers.example")
     test_json_nodes <<<"$output" \
                     'signed_subject:[0][0][0]["crypto"]["signed"]["headers"]=["Subject"]' \
-- 
2.26.2