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-rw-r--r--smime/lib/e-asn1-object.c393
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diff --git a/smime/lib/e-asn1-object.c b/smime/lib/e-asn1-object.c
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--- a/smime/lib/e-asn1-object.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/* e-cert.c
- *
- * Copyright (C) 2003 Ximian, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- *
- * Author: Chris Toshok (toshok@ximian.com)
- */
-
-/* The following is the mozilla license blurb, as the bodies some of
- these functions were derived from the mozilla source. */
-
-/*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- *
- */
-
-#include "e-asn1-object.h"
-
-#include "secasn1.h"
-
-struct _EASN1ObjectPrivate {
- PRUint32 tag;
- PRUint32 type;
- gboolean valid_container;
-
- GList *children;
-
- char *display_name;
- char *value;
-
- char *data;
- guint data_len;
-};
-
-#define PARENT_TYPE G_TYPE_OBJECT
-static GObjectClass *parent_class;
-
-static void
-e_asn1_object_dispose (GObject *object)
-{
- EASN1Object *obj = E_ASN1_OBJECT (object);
- if (obj->priv) {
-
- if (obj->priv->display_name)
- g_free (obj->priv->display_name);
-
- if (obj->priv->value)
- g_free (obj->priv->value);
-
- g_list_foreach (obj->priv->children, (GFunc)g_object_unref, NULL);
- g_list_free (obj->priv->children);
-
- g_free (obj->priv);
- obj->priv = NULL;
- }
-}
-
-static void
-e_asn1_object_class_init (EASN1ObjectClass *klass)
-{
- GObjectClass *object_class;
-
- object_class = G_OBJECT_CLASS(klass);
-
- parent_class = g_type_class_ref (PARENT_TYPE);
-
- object_class->dispose = e_asn1_object_dispose;
-}
-
-static void
-e_asn1_object_init (EASN1Object *asn1)
-{
- asn1->priv = g_new0 (EASN1ObjectPrivate, 1);
-
- asn1->priv->valid_container = TRUE;
-}
-
-GType
-e_asn1_object_get_type (void)
-{
- static GType asn1_object_type = 0;
-
- if (!asn1_object_type) {
- static const GTypeInfo asn1_object_info = {
- sizeof (EASN1ObjectClass),
- NULL, /* base_init */
- NULL, /* base_finalize */
- (GClassInitFunc) e_asn1_object_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (EASN1Object),
- 0, /* n_preallocs */
- (GInstanceInitFunc) e_asn1_object_init,
- };
-
- asn1_object_type = g_type_register_static (PARENT_TYPE, "EASN1Object", &asn1_object_info, 0);
- }
-
- return asn1_object_type;
-}
-
-
-/* This function is used to interpret an integer that
- was encoded in a DER buffer. This function is used
- when converting a DER buffer into a nsIASN1Object
- structure. This interprets the buffer in data
- as defined by the DER (Distinguised Encoding Rules) of
- ASN1.
-*/
-static int
-get_integer_256 (unsigned char *data, unsigned int nb)
-{
- int val;
-
- switch (nb) {
- case 1:
- val = data[0];
- break;
- case 2:
- val = (data[0] << 8) | data[1];
- break;
- case 3:
- val = (data[0] << 16) | (data[1] << 8) | data[2];
- break;
- case 4:
- val = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
- break;
- default:
- return -1;
- }
-
- return val;
-}
-
-/* This function is used to retrieve the lenght of a DER encoded
- item. It looks to see if this a multibyte length and then
- interprets the buffer accordingly to get the actual length value.
- This funciton is used mostly while parsing the DER headers.
-
- A DER encoded item has the following structure:
-
- <tag><length<data consisting of lenght bytes>
-*/
-static guint32
-get_der_item_length (unsigned char *data, unsigned char *end,
- unsigned long *bytesUsed, gboolean *indefinite)
-{
- unsigned char lbyte = *data++;
- PRInt32 length = -1;
-
- *indefinite = FALSE;
- if (lbyte >= 0x80) {
- /* Multibyte length */
- unsigned nb = (unsigned) (lbyte & 0x7f);
- if (nb > 4) {
- return -1;
- }
- if (nb > 0) {
-
- if ((data+nb) > end) {
- return -1;
- }
- length = get_integer_256 (data, nb);
- if (length < 0)
- return -1;
- } else {
- *indefinite = TRUE;
- length = 0;
- }
- *bytesUsed = nb+1;
- } else {
- length = lbyte;
- *bytesUsed = 1;
- }
- return length;
-}
-
-static gboolean
-build_from_der (EASN1Object *parent, char *data, char *end)
-{
- unsigned long bytesUsed;
- gboolean indefinite;
- PRInt32 len;
- PRUint32 type;
- unsigned char code, tagnum;
- EASN1Object *asn1object;
-
- if (data >= end)
- return TRUE;
-
- /*
- A DER item has the form of |tag|len|data
- tag is one byte and describes the type of elment
- we are dealing with.
- len is a DER encoded int telling us how long the data is
- data is a buffer that is len bytes long and has to be
- interpreted according to its type.
- */
-
- while (data < end) {
- code = *data;
- tagnum = code & SEC_ASN1_TAGNUM_MASK;
-
- /*
- * NOTE: This code does not (yet) handle the high-tag-number form!
- */
- if (tagnum == SEC_ASN1_HIGH_TAG_NUMBER) {
- return FALSE;
- }
- data++;
- len = get_der_item_length (data, end, &bytesUsed, &indefinite);
- data += bytesUsed;
- if ((len < 0) || ((data+len) > end))
- return FALSE;
-
- if (code & SEC_ASN1_CONSTRUCTED) {
- if (len > 0 || indefinite) {
- switch (code & SEC_ASN1_CLASS_MASK) {
- case SEC_ASN1_UNIVERSAL:
- type = tagnum;
- break;
- case SEC_ASN1_APPLICATION:
- type = E_ASN1_OBJECT_TYPE_APPLICATION;
- break;
- case SEC_ASN1_CONTEXT_SPECIFIC:
- type = E_ASN1_OBJECT_TYPE_CONTEXT_SPECIFIC;
- break;
- case SEC_ASN1_PRIVATE:
- type = E_ASN1_OBJECT_TYPE_PRIVATE;
- break;
- default:
- g_warning ("bad DER");
- return FALSE;
- }
-
- asn1object = e_asn1_object_new ();
- asn1object->priv->tag = tagnum;
- asn1object->priv->type = type;
-
- if (!build_from_der (asn1object, data, (len == 0) ? end : data + len)) {
- g_object_unref (asn1object);
- return FALSE;
- }
- }
- } else {
- asn1object = e_asn1_object_new ();
-
- asn1object->priv->type = tagnum;
- asn1object->priv->tag = tagnum;
-
- /*printableItem->SetData((char*)data, len);*/
- }
- data += len;
-
- parent->priv->children = g_list_append (parent->priv->children, asn1object);
- }
-
- return TRUE;
-}
-
-EASN1Object*
-e_asn1_object_new_from_der (char *data, guint32 len)
-{
- EASN1Object *obj = g_object_new (E_TYPE_ASN1_OBJECT, NULL);
-
- if (!build_from_der (obj, data, data + len)) {
- g_object_unref (obj);
- return NULL;
- }
-
- return obj;
-}
-
-EASN1Object*
-e_asn1_object_new (void)
-{
- return E_ASN1_OBJECT (g_object_new (E_TYPE_ASN1_OBJECT, NULL));
-}
-
-
-void
-e_asn1_object_set_valid_container (EASN1Object *obj, gboolean flag)
-{
- obj->priv->valid_container = flag;
-}
-
-gboolean
-e_asn1_object_is_valid_container (EASN1Object *obj)
-{
- return obj->priv->valid_container;
-}
-
-PRUint32
-e_asn1_object_get_asn1_type (EASN1Object *obj)
-{
- return obj->priv->type;
-}
-
-PRUint32
-e_asn1_object_get_asn1_tag (EASN1Object *obj)
-{
- return obj->priv->tag;
-}
-
-GList*
-e_asn1_object_get_children (EASN1Object *obj)
-{
- GList *children = g_list_copy (obj->priv->children);
-
- g_list_foreach (children, (GFunc)g_object_ref, NULL);
-
- return children;
-}
-
-void
-e_asn1_object_append_child (EASN1Object *parent, EASN1Object *child)
-{
- parent->priv->children = g_list_append (parent->priv->children, g_object_ref (child));
-}
-
-void
-e_asn1_object_set_display_name (EASN1Object *obj, const char *name)
-{
- g_free (obj->priv->display_name);
- obj->priv->display_name = g_strdup (name);
-}
-
-const char*
-e_asn1_object_get_display_name (EASN1Object *obj)
-{
- return obj->priv->display_name;
-}
-
-void
-e_asn1_object_set_display_value (EASN1Object *obj, const char *value)
-{
- g_free (obj->priv->value);
- obj->priv->value = g_strdup (value);
-}
-
-const char*
-e_asn1_object_get_display_value (EASN1Object *obj)
-{
- return obj->priv->value;
-}
-
-void
-e_asn1_object_get_data (EASN1Object *obj, char **data, guint32 *len)
-{
- *data = obj->priv->data;
- *len = obj->priv->data_len;
-}
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