X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=mime-node.c;h=e96e6639716aa017b1b36476900354d51563917b;hp=d26bb445db142173dd3e38b0c4dec53d5da1341b;hb=005c2f0df17de8afdf9f67b923d26f2358236171;hpb=5d1ac7d1d351c6f122ddaa44d3c82ec68d45178c

diff --git a/mime-node.c b/mime-node.c
index d26bb445..e96e6639 100644
--- a/mime-node.c
+++ b/mime-node.c
@@ -33,8 +33,7 @@ typedef struct mime_node_context {
     GMimeMessage *mime_message;
 
     /* Context provided by the caller. */
-    GMimeCipherContext *cryptoctx;
-    notmuch_bool_t decrypt;
+    notmuch_crypto_t *crypto;
 } mime_node_context_t;
 
 static int
@@ -57,8 +56,7 @@ _mime_node_context_free (mime_node_context_t *res)
 
 notmuch_status_t
 mime_node_open (const void *ctx, notmuch_message_t *message,
-		GMimeCipherContext *cryptoctx, notmuch_bool_t decrypt,
-		mime_node_t **root_out)
+		notmuch_crypto_t *crypto, mime_node_t **root_out)
 {
     const char *filename = notmuch_message_get_filename (message);
     mime_node_context_t *mctx;
@@ -89,14 +87,28 @@ mime_node_open (const void *ctx, notmuch_message_t *message,
     }
 
     mctx->stream = g_mime_stream_file_new (mctx->file);
+    if (!mctx->stream) {
+	fprintf (stderr, "Out of memory.\n");
+	status = NOTMUCH_STATUS_OUT_OF_MEMORY;
+	goto DONE;
+    }
     g_mime_stream_file_set_owner (GMIME_STREAM_FILE (mctx->stream), FALSE);
 
     mctx->parser = g_mime_parser_new_with_stream (mctx->stream);
+    if (!mctx->parser) {
+	fprintf (stderr, "Out of memory.\n");
+	status = NOTMUCH_STATUS_OUT_OF_MEMORY;
+	goto DONE;
+    }
 
     mctx->mime_message = g_mime_parser_construct_message (mctx->parser);
+    if (!mctx->mime_message) {
+	fprintf (stderr, "Failed to parse %s\n", filename);
+	status = NOTMUCH_STATUS_FILE_ERROR;
+	goto DONE;
+    }
 
-    mctx->cryptoctx = cryptoctx;
-    mctx->decrypt = decrypt;
+    mctx->crypto = crypto;
 
     /* Create the root node */
     root->part = GMIME_OBJECT (mctx->mime_message);
@@ -104,6 +116,11 @@ mime_node_open (const void *ctx, notmuch_message_t *message,
     root->nchildren = 1;
     root->ctx = mctx;
 
+    root->parent = NULL;
+    root->part_num = 0;
+    root->next_child = 0;
+    root->next_part_num = 1;
+
     *root_out = root;
     return NOTMUCH_STATUS_SUCCESS;
 
@@ -112,18 +129,85 @@ DONE:
     return status;
 }
 
+/* Signature list destructor (GMime 2.6) */
 static int
-_signature_validity_free (GMimeSignatureValidity **proxy)
+_signature_list_free (GMimeSignatureList **proxy)
 {
-    g_mime_signature_validity_free (*proxy);
+    g_object_unref (*proxy);
     return 0;
 }
 
+/* Set up signature list destructor (GMime 2.6) */
+static void
+set_signature_list_destructor (mime_node_t *node)
+{
+    GMimeSignatureList **proxy = talloc (node, GMimeSignatureList *);
+    if (proxy) {
+	*proxy = node->sig_list;
+	talloc_set_destructor (proxy, _signature_list_free);
+    }
+}
+
+/* Verify a signed mime node (GMime 2.6) */
+static void
+node_verify (mime_node_t *node, GMimeObject *part,
+	     notmuch_crypto_context_t *cryptoctx)
+{
+    GError *err = NULL;
+
+    node->verify_attempted = TRUE;
+    node->sig_list = g_mime_multipart_signed_verify
+	(GMIME_MULTIPART_SIGNED (part), cryptoctx, &err);
+
+    if (node->sig_list)
+	set_signature_list_destructor (node);
+    else
+	fprintf (stderr, "Failed to verify signed part: %s\n",
+		 err ? err->message : "no error explanation given");
+
+    if (err)
+	g_error_free (err);
+}
+
+/* Decrypt and optionally verify an encrypted mime node (GMime 2.6) */
+static void
+node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
+			 notmuch_crypto_context_t *cryptoctx)
+{
+    GError *err = NULL;
+    GMimeDecryptResult *decrypt_result = NULL;
+    GMimeMultipartEncrypted *encrypteddata = GMIME_MULTIPART_ENCRYPTED (part);
+
+    node->decrypt_attempted = TRUE;
+    node->decrypted_child = g_mime_multipart_encrypted_decrypt
+	(encrypteddata, cryptoctx, &decrypt_result, &err);
+    if (! node->decrypted_child) {
+	fprintf (stderr, "Failed to decrypt part: %s\n",
+		 err ? err->message : "no error explanation given");
+	goto DONE;
+    }
+
+    node->decrypt_success = TRUE;
+    node->verify_attempted = TRUE;
+
+    /* This may be NULL if the part is not signed. */
+    node->sig_list = g_mime_decrypt_result_get_signatures (decrypt_result);
+    if (node->sig_list) {
+	g_object_ref (node->sig_list);
+	set_signature_list_destructor (node);
+    }
+    g_object_unref (decrypt_result);
+
+ DONE:
+    if (err)
+	g_error_free (err);
+}
+
 static mime_node_t *
-_mime_node_create (const mime_node_t *parent, GMimeObject *part)
+_mime_node_create (mime_node_t *parent, GMimeObject *part)
 {
     mime_node_t *node = talloc_zero (parent, mime_node_t);
-    GError *err = NULL;
+    notmuch_crypto_context_t *cryptoctx = NULL;
 
     /* Set basic node properties */
     node->part = part;
@@ -133,6 +217,9 @@ _mime_node_create (const mime_node_t *parent, GMimeObject *part)
 	talloc_free (node);
 	return NULL;
     }
+    node->parent = parent;
+    node->part_num = node->next_part_num = -1;
+    node->next_child = 0;
 
     /* Deal with the different types of parts */
     if (GMIME_IS_PART (part)) {
@@ -153,72 +240,44 @@ _mime_node_create (const mime_node_t *parent, GMimeObject *part)
 	return NULL;
     }
 
+    if ((GMIME_IS_MULTIPART_ENCRYPTED (part) && node->ctx->crypto->decrypt)
+	|| (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");
+	cryptoctx = notmuch_crypto_get_context (node->ctx->crypto, protocol);
+    }
+
     /* Handle PGP/MIME parts */
-    if (GMIME_IS_MULTIPART_ENCRYPTED (part)
-	&& node->ctx->cryptoctx && node->ctx->decrypt) {
+    if (GMIME_IS_MULTIPART_ENCRYPTED (part) && node->ctx->crypto->decrypt && cryptoctx) {
 	if (node->nchildren != 2) {
 	    /* this violates RFC 3156 section 4, so we won't bother with it. */
 	    fprintf (stderr, "Error: %d part(s) for a multipart/encrypted "
 		     "message (must be exactly 2)\n",
 		     node->nchildren);
 	} else {
-	    GMimeMultipartEncrypted *encrypteddata =
-		GMIME_MULTIPART_ENCRYPTED (part);
-	    node->decrypt_attempted = TRUE;
-	    node->decrypted_child = g_mime_multipart_encrypted_decrypt
-		(encrypteddata, node->ctx->cryptoctx, &err);
-	    if (node->decrypted_child) {
-		node->decrypt_success = node->verify_attempted = TRUE;
-		node->sig_validity = g_mime_multipart_encrypted_get_signature_validity (encrypteddata);
-	    } else {
-		fprintf (stderr, "Failed to decrypt part: %s\n",
-			 (err ? err->message : "no error explanation given"));
-	    }
+	    node_decrypt_and_verify (node, part, cryptoctx);
 	}
-    } else if (GMIME_IS_MULTIPART_SIGNED (part) && node->ctx->cryptoctx) {
+    } else if (GMIME_IS_MULTIPART_SIGNED (part) && node->ctx->crypto->verify && cryptoctx) {
 	if (node->nchildren != 2) {
 	    /* this violates RFC 3156 section 5, so we won't bother with it. */
 	    fprintf (stderr, "Error: %d part(s) for a multipart/signed message "
 		     "(must be exactly 2)\n",
 		     node->nchildren);
 	} else {
-	    /* For some reason the GMimeSignatureValidity returned
-	     * here is not a const (inconsistent with that
-	     * returned by
-	     * g_mime_multipart_encrypted_get_signature_validity,
-	     * and therefore needs to be properly disposed of.
-	     *
-	     * In GMime 2.6, they're both non-const, so we'll be able
-	     * to clean up this asymmetry. */
-	    GMimeSignatureValidity *sig_validity = g_mime_multipart_signed_verify
-		(GMIME_MULTIPART_SIGNED (part), node->ctx->cryptoctx, &err);
-	    node->verify_attempted = TRUE;
-	    node->sig_validity = sig_validity;
-	    if (sig_validity) {
-		GMimeSignatureValidity **proxy =
-		    talloc (node, GMimeSignatureValidity *);
-		*proxy = sig_validity;
-		talloc_set_destructor (proxy, _signature_validity_free);
-	    }
+	    node_verify (node, part, cryptoctx);
 	}
     }
 
-    if (node->verify_attempted && !node->sig_validity)
-	fprintf (stderr, "Failed to verify signed part: %s\n",
-		 (err ? err->message : "no error explanation given"));
-
-    if (err)
-	g_error_free (err);
-
     return node;
 }
 
 mime_node_t *
-mime_node_child (const mime_node_t *parent, int child)
+mime_node_child (mime_node_t *parent, int child)
 {
     GMimeObject *sub;
+    mime_node_t *node;
 
-    if (!parent || child < 0 || child >= parent->nchildren)
+    if (!parent || !parent->part || child < 0 || child >= parent->nchildren)
 	return NULL;
 
     if (GMIME_IS_MULTIPART (parent->part)) {
@@ -234,7 +293,30 @@ mime_node_child (const mime_node_t *parent, int child)
 	INTERNAL_ERROR ("Unexpected GMimeObject type: %s",
 			g_type_name (G_OBJECT_TYPE (parent->part)));
     }
-    return _mime_node_create (parent, sub);
+    node = _mime_node_create (parent, sub);
+
+    if (child == parent->next_child && parent->next_part_num != -1) {
+	/* We're traversing in depth-first order.  Record the child's
+	 * depth-first numbering. */
+	node->part_num = parent->next_part_num;
+	node->next_part_num = node->part_num + 1;
+
+	/* Prepare the parent for its next depth-first child. */
+	parent->next_child++;
+	parent->next_part_num = -1;
+
+	if (node->nchildren == 0) {
+	    /* We've reached a leaf, so find the parent that has more
+	     * children and set it up to number its next child. */
+	    mime_node_t *iter = node->parent;
+	    while (iter && iter->next_child == iter->nchildren)
+		iter = iter->parent;
+	    if (iter)
+		iter->next_part_num = node->part_num + 1;
+	}
+    }
+
+    return node;
 }
 
 static mime_node_t *