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-rw-r--r--camel/camel-multipart-encrypted.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/camel/camel-multipart-encrypted.c b/camel/camel-multipart-encrypted.c
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index d44d712322..0000000000
--- a/camel/camel-multipart-encrypted.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/*
- * Authors: Jeffrey Stedfast <fejj@ximian.com>
- *
- * Copyright 2002 Ximian, Inc. (www.ximian.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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 Street #330, Boston, MA 02111-1307, USA.
- *
- */
-
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <string.h>
-
-#include "camel-multipart-encrypted.h"
-#include "camel-mime-filter-crlf.h"
-#include "camel-stream-filter.h"
-#include "camel-stream-mem.h"
-#include "camel-stream-fs.h"
-#include "camel-mime-utils.h"
-#include "camel-mime-part.h"
-
-static void camel_multipart_encrypted_class_init (CamelMultipartEncryptedClass *klass);
-static void camel_multipart_encrypted_init (gpointer object, gpointer klass);
-static void camel_multipart_encrypted_finalize (CamelObject *object);
-
-static void set_mime_type_field (CamelDataWrapper *data_wrapper, CamelContentType *mime_type);
-
-
-static CamelMultipartClass *parent_class = NULL;
-
-
-CamelType
-camel_multipart_encrypted_get_type (void)
-{
- static CamelType type = CAMEL_INVALID_TYPE;
-
- if (type == CAMEL_INVALID_TYPE) {
- type = camel_type_register (camel_multipart_get_type (),
- "CamelMultipartEncrypted",
- sizeof (CamelMultipartEncrypted),
- sizeof (CamelMultipartEncryptedClass),
- (CamelObjectClassInitFunc) camel_multipart_encrypted_class_init,
- NULL,
- (CamelObjectInitFunc) camel_multipart_encrypted_init,
- (CamelObjectFinalizeFunc) camel_multipart_encrypted_finalize);
- }
-
- return type;
-}
-
-
-static void
-camel_multipart_encrypted_class_init (CamelMultipartEncryptedClass *klass)
-{
- CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (klass);
-
- parent_class = (CamelMultipartClass *) camel_multipart_get_type ();
-
- /* virtual method overload */
- camel_data_wrapper_class->set_mime_type_field = set_mime_type_field;
-}
-
-static void
-camel_multipart_encrypted_init (gpointer object, gpointer klass)
-{
- CamelMultipartEncrypted *multipart = (CamelMultipartEncrypted *) object;
-
- camel_data_wrapper_set_mime_type (CAMEL_DATA_WRAPPER (multipart), "multipart/encrypted");
-
- multipart->decrypted = NULL;
-}
-
-static void
-camel_multipart_encrypted_finalize (CamelObject *object)
-{
- CamelMultipartEncrypted *mpe = (CamelMultipartEncrypted *) object;
-
- g_free (mpe->protocol);
-
- if (mpe->decrypted)
- camel_object_unref (mpe->decrypted);
-}
-
-/* we snoop the mime type to get the protocol */
-static void
-set_mime_type_field (CamelDataWrapper *data_wrapper, CamelContentType *mime_type)
-{
- CamelMultipartEncrypted *mpe = (CamelMultipartEncrypted *) data_wrapper;
-
- if (mime_type) {
- const char *protocol;
-
- protocol = header_content_type_param (mime_type, "protocol");
- g_free (mpe->protocol);
- mpe->protocol = g_strdup (protocol);
- }
-
- ((CamelDataWrapperClass *) parent_class)->set_mime_type_field (data_wrapper, mime_type);
-}
-
-
-/**
- * camel_multipart_encrypted_new:
- *
- * Create a new CamelMultipartEncrypted object.
- *
- * A MultipartEncrypted should be used to store and create parts of
- * type "multipart/encrypted".
- *
- * Returns a new CamelMultipartEncrypted
- **/
-CamelMultipartEncrypted *
-camel_multipart_encrypted_new (void)
-{
- CamelMultipartEncrypted *multipart;
-
- multipart = (CamelMultipartEncrypted *) camel_object_new (CAMEL_MULTIPART_ENCRYPTED_TYPE);
-
- return multipart;
-}
-
-
-int
-camel_multipart_encrypted_encrypt (CamelMultipartEncrypted *mpe, CamelMimePart *content,
- CamelCipherContext *cipher, const char *userid,
- GPtrArray *recipients, CamelException *ex)
-{
- CamelMimePart *version_part, *encrypted_part;
- CamelContentType *mime_type;
- CamelDataWrapper *wrapper;
- CamelStream *filtered_stream;
- CamelStream *stream, *ciphertext;
- CamelMimeFilter *crlf_filter;
-
- g_return_val_if_fail (CAMEL_IS_MULTIPART_ENCRYPTED (mpe), -1);
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (cipher), -1);
- g_return_val_if_fail (cipher->encrypt_protocol != NULL, -1);
- g_return_val_if_fail (CAMEL_IS_MIME_PART (content), -1);
-
- /* get the cleartext */
- stream = camel_stream_mem_new ();
- filtered_stream = (CamelStream *) camel_stream_filter_new_with_stream (stream);
-
- crlf_filter = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE,
- CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
- camel_stream_filter_add (CAMEL_STREAM_FILTER (filtered_stream), crlf_filter);
- camel_object_unref (crlf_filter);
-
- camel_data_wrapper_write_to_stream ((CamelDataWrapper *) content, filtered_stream);
- camel_stream_flush (filtered_stream);
- camel_object_unref (filtered_stream);
-
- /* reset the content stream */
- camel_stream_reset (stream);
-
- /* encrypt the content stream */
- ciphertext = camel_stream_mem_new ();
- if (camel_cipher_encrypt (cipher, FALSE, userid, recipients, stream, ciphertext, ex) == -1) {
- camel_object_unref (ciphertext);
- camel_object_unref (stream);
- return -1;
- }
-
- camel_object_unref (stream);
- camel_stream_reset (ciphertext);
-
- /* construct the version part */
- stream = camel_stream_mem_new ();
- camel_stream_write_string (stream, "Version: 1\n");
- camel_stream_reset (stream);
-
- version_part = camel_mime_part_new ();
- wrapper = camel_data_wrapper_new ();
- camel_data_wrapper_set_mime_type (wrapper, cipher->encrypt_protocol);
- camel_data_wrapper_construct_from_stream (wrapper, stream);
- camel_object_unref (stream);
- camel_medium_set_content_object ((CamelMedium *) version_part, wrapper);
- camel_object_unref (wrapper);
-
- /* construct the encrypted mime part */
- encrypted_part = camel_mime_part_new ();
- wrapper = camel_data_wrapper_new ();
- camel_data_wrapper_set_mime_type (wrapper, "application/octet-stream; name=encrypted.asc");
- camel_data_wrapper_construct_from_stream (wrapper, ciphertext);
- camel_object_unref (ciphertext);
- camel_medium_set_content_object ((CamelMedium *) encrypted_part, wrapper);
- camel_object_unref (wrapper);
-
- /* save the version and encrypted parts */
- /* FIXME: make sure there aren't any other parts?? */
- camel_multipart_add_part (CAMEL_MULTIPART (mpe), version_part);
- camel_object_unref (version_part);
- camel_multipart_add_part (CAMEL_MULTIPART (mpe), encrypted_part);
- camel_object_unref (encrypted_part);
-
- /* cache the decrypted content */
- camel_object_ref (content);
- mpe->decrypted = content;
-
- /* set the content-type params for this multipart/encrypted part */
- mime_type = header_content_type_new ("multipart", "encrypted");
- header_content_type_set_param (mime_type, "protocol", cipher->encrypt_protocol);
- camel_data_wrapper_set_mime_type_field (CAMEL_DATA_WRAPPER (mpe), mime_type);
- header_content_type_unref (mime_type);
- camel_multipart_set_boundary ((CamelMultipart *) mpe, NULL);
-
- return 0;
-}
-
-
-CamelMimePart *
-camel_multipart_encrypted_decrypt (CamelMultipartEncrypted *mpe,
- CamelCipherContext *cipher,
- CamelException *ex)
-{
- CamelMimePart *version_part, *encrypted_part, *decrypted_part;
- CamelContentType *mime_type;
- CamelDataWrapper *wrapper;
- CamelStream *filtered_stream;
- CamelMimeFilter *crlf_filter;
- CamelStream *ciphertext;
- CamelStream *stream;
- const char *protocol;
- char *content_type;
-
- g_return_val_if_fail (CAMEL_IS_MULTIPART_ENCRYPTED (mpe), NULL);
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (cipher), NULL);
- g_return_val_if_fail (cipher->encrypt_protocol != NULL, NULL);
-
- if (mpe->decrypted) {
- /* we seem to have already decrypted the part */
- camel_object_ref (mpe->decrypted);
- return mpe->decrypted;
- }
-
- protocol = mpe->protocol;
-
- if (protocol) {
- /* make sure the protocol matches the cipher encrypt protocol */
- if (strcasecmp (cipher->encrypt_protocol, protocol) != 0) {
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Failed to decrypt MIME part: protocol error"));
-
- return NULL;
- }
- } else {
- /* *shrug* - I guess just go on as if they match? */
- protocol = cipher->encrypt_protocol;
- }
-
- /* make sure the protocol matches the version part's content-type */
- version_part = camel_multipart_get_part (CAMEL_MULTIPART (mpe), CAMEL_MULTIPART_ENCRYPTED_VERSION);
- wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (version_part));
- content_type = camel_data_wrapper_get_mime_type (wrapper);
- if (strcasecmp (content_type, protocol) != 0) {
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Failed to decrypt MIME part: protocol error"));
-
- g_free (content_type);
-
- return NULL;
- }
- g_free (content_type);
-
- /* get the encrypted part (second part) */
- encrypted_part = camel_multipart_get_part (CAMEL_MULTIPART (mpe), CAMEL_MULTIPART_ENCRYPTED_CONTENT);
- mime_type = camel_mime_part_get_content_type (encrypted_part);
- if (!header_content_type_is (mime_type, "application", "octet-stream")) {
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Failed to decrypt MIME part: invalid structure"));
- return NULL;
- }
-
- /* get the ciphertext stream */
- ciphertext = camel_stream_mem_new ();
- wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (encrypted_part));
- camel_data_wrapper_write_to_stream (wrapper, ciphertext);
- camel_stream_reset (ciphertext);
-
- stream = camel_stream_mem_new ();
- filtered_stream = (CamelStream *) camel_stream_filter_new_with_stream (stream);
- crlf_filter = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_DECODE,
- CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
- camel_stream_filter_add (CAMEL_STREAM_FILTER (filtered_stream), crlf_filter);
- camel_object_unref (crlf_filter);
-
- /* get the cleartext */
- if (camel_cipher_decrypt (cipher, ciphertext, filtered_stream, ex) == -1) {
- camel_object_unref (filtered_stream);
- camel_object_unref (ciphertext);
- camel_object_unref (stream);
-
- return NULL;
- }
-
- camel_stream_flush (filtered_stream);
- camel_object_unref (filtered_stream);
- camel_object_unref (ciphertext);
- camel_stream_reset (stream);
-
- decrypted_part = camel_mime_part_new ();
- camel_data_wrapper_construct_from_stream (CAMEL_DATA_WRAPPER (decrypted_part), stream);
-
- if (decrypted_part) {
- /* cache the decrypted part */
- camel_object_ref (decrypted_part);
- mpe->decrypted = decrypted_part;
- } else {
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Failed to decrypt MIME part: parse error"));
- }
-
- return decrypted_part;
-}