From 2831ada5a5554a4a3c1920d73b43343d618f0e02 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 3 Dec 2003 20:48:05 +0000 Subject: add e-asn1-object.[ch] 2003-12-03 Chris Toshok * lib/Makefile.am (libessmime_la_SOURCES): add e-asn1-object.[ch] * gui/smime-ui.glade: rename the ca trust dialog, and give it a proper id. * gui/certificate-manager.c (yourcerts_selection_changed): just use @selection. (contactcerts_selection_changed): same. (authoritycerts_selection_changed): same. * gui/certificate-viewer.c (free_data): free the cert chain. (fill_in_general): move all the general tab stuff here. (hierarchy_selection_changed): new function. not finished. (fields_selection_changed): new function, unimplemented. (fill_in_details): new function, fill in the heirarchy and hook up signals and stuff. (certificate_viewer_show): call fill_in_general/fill_in_details. * lib/e-cert.c (e_cert_get_chain): new function. * lib/e-cert.h: add prototype for e_cert_get_chain. svn path=/trunk/; revision=23622 --- smime/lib/e-asn1-object.c | 369 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 369 insertions(+) create mode 100644 smime/lib/e-asn1-object.c (limited to 'smime/lib/e-asn1-object.c') diff --git a/smime/lib/e-asn1-object.c b/smime/lib/e-asn1-object.c new file mode 100644 index 0000000000..47cf591b48 --- /dev/null +++ b/smime/lib/e-asn1-object.c @@ -0,0 +1,369 @@ +/* -*- 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) +{ +} + +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); +} + +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: + + +*/ +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_from_cert (ECert *cert) +{ + char *data; + guint32 len; + EASN1Object *obj; + + if (!e_cert_get_raw_der (cert, &data, &len)) + return NULL; + + 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)); +} + + +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; +} + +const char* +e_asn1_object_get_display_name (EASN1Object *obj) +{ + return obj->priv->display_name; +} + +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; +} -- cgit v1.2.3