[PATCH 06/20] mime-node: track whole-message crypto state while walking the tree

[Daniel Kahn Gillmor]

Deliberately populate the message's cryptographic status while walking
the MIME tree from the CLI.
---
 mime-node.c | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/mime-node.c b/mime-node.c
index cbff95d1..6ecd121d 100644
--- a/mime-node.c
+++ b/mime-node.c
@@ -49,6 +49,9 @@ _mime_node_context_free (mime_node_context_t *res)
     if (res->stream)
 	g_object_unref (res->stream);
 
+    if (res->msg_crypto)
+	_notmuch_message_crypto_cleanup (res->msg_crypto);
+
     if (res->file)
 	fclose (res->file);
 
@@ -135,6 +138,8 @@ mime_node_open (const void *ctx, notmuch_message_t *message,
 	goto DONE;
     }
 
+    mctx->msg_crypto = _notmuch_message_crypto_new (mctx);
+
     mctx->crypto = crypto;
 
     /* Create the root node */
@@ -181,6 +186,7 @@ node_verify (mime_node_t *node, GMimeObject *part,
 	     g_mime_3_unused(GMimeCryptoContext *cryptoctx))
 {
     GError *err = NULL;
+    notmuch_status_t status;
 
     node->verify_attempted = true;
     node->sig_list = g_mime_multipart_signed_verify
@@ -194,6 +200,10 @@ node_verify (mime_node_t *node, GMimeObject *part,
 
     if (err)
 	g_error_free (err);
+
+    status = _notmuch_message_crypto_set_sig_list(node->ctx->msg_crypto, node->sig_list);
+    if (status) /* this is a warning, not an error */
+	fprintf (stderr, "Warning: failed to note signature status: %s.\n", notmuch_status_to_string (status));
 }
 
 /* Decrypt and optionally verify an encrypted mime node (GMime 2.6) */
@@ -203,6 +213,7 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
 {
     GError *err = NULL;
     GMimeDecryptResult *decrypt_result = NULL;
+    notmuch_status_t status;
     GMimeMultipartEncrypted *encrypteddata = GMIME_MULTIPART_ENCRYPTED (part);
 
     if (! node->decrypted_child) {
@@ -223,6 +234,9 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
     }
 
     node->decrypt_success = true;
+    status = _notmuch_message_crypto_successful_decryption (node->ctx->msg_crypto);
+    if (status) /* this is a warning, not an error */
+	fprintf (stderr, "Warning: failed to note decryption status: %s.\n", notmuch_status_to_string (status));
 
     if (decrypt_result) {
 	/* This may be NULL if the part is not signed. */
@@ -231,6 +245,9 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
 	    node->verify_attempted = true;
 	    g_object_ref (node->sig_list);
 	    set_signature_list_destructor (node);
+	    status = _notmuch_message_crypto_set_sig_list(node->ctx->msg_crypto, node->sig_list);
+	    if (status) /* this is a warning, not an error */
+		fprintf (stderr, "Warning: failed to note signature status: %s.\n", notmuch_status_to_string (status));
 	}
 	g_object_unref (decrypt_result);
     }
@@ -241,10 +258,11 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
 }
 
 static mime_node_t *
-_mime_node_create (mime_node_t *parent, GMimeObject *part)
+_mime_node_create (mime_node_t *parent, GMimeObject *part, int numchild)
 {
     mime_node_t *node = talloc_zero (parent, mime_node_t);
     GMimeCryptoContext *cryptoctx = NULL;
+    notmuch_status_t status;
 
     /* Set basic node properties */
     node->part = part;
@@ -282,7 +300,6 @@ _mime_node_create (mime_node_t *parent, GMimeObject *part)
 	|| (GMIME_IS_MULTIPART_SIGNED (part) && node->ctx->crypto->verify)) {
 	GMimeContentType *content_type = g_mime_object_get_content_type (part);
 	const char *protocol = g_mime_content_type_get_parameter (content_type, "protocol");
-	notmuch_status_t status;
 	status = _notmuch_crypto_get_gmime_ctx_for_protocol (node->ctx->crypto,
 							     protocol, &cryptoctx);
 	if (status) /* this is a warning, not an error */
@@ -312,6 +329,10 @@ _mime_node_create (mime_node_t *parent, GMimeObject *part)
 	} else {
 	    node_verify (node, part, cryptoctx);
 	}
+    } else {
+	status = _notmuch_message_crypto_potential_payload (node->ctx->msg_crypto, part, parent ? parent->part : NULL, numchild);
+	if (status)
+	    fprintf (stderr, "Warning: failed to record potential crypto payload (%s).\n", notmuch_status_to_string (status));
     }
 
     return node;
@@ -339,7 +360,7 @@ mime_node_child (mime_node_t *parent, int child)
 	INTERNAL_ERROR ("Unexpected GMimeObject type: %s",
 			g_type_name (G_OBJECT_TYPE (parent->part)));
     }
-    node = _mime_node_create (parent, sub);
+    node = _mime_node_create (parent, sub, child);
 
     if (child == parent->next_child && parent->next_part_num != -1) {
 	/* We're traversing in depth-first order.  Record the child's
-- 
2.17.0