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-rw-r--r--camel/camel-multipart-signed.c740
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diff --git a/camel/camel-multipart-signed.c b/camel/camel-multipart-signed.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
- * camel-multipart.c : Abstract class for a multipart
- *
- * Authors: Michael Zucchi <notzed@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 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
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#endif
-
-#include <stdio.h>
-
-#include <string.h>
-#include <unistd.h>
-#include <time.h>
-
-#include <errno.h>
-
-#include "camel-mime-part.h"
-#include "camel-mime-message.h"
-#include "camel-mime-parser.h"
-#include "camel-stream-mem.h"
-#include "camel-multipart-signed.h"
-#include "camel-mime-part.h"
-#include "camel-exception.h"
-#include "md5-utils.h"
-
-#include "camel-stream-filter.h"
-#include "camel-seekable-substream.h"
-#include "camel-mime-filter-crlf.h"
-#include "camel-mime-filter-canon.h"
-
-#define d(x) /*(printf("%s(%d): ", __FILE__, __LINE__),(x))
- #include <stdio.h>;*/
-
-static void signed_add_part(CamelMultipart *multipart, CamelMimePart *part);
-static void signed_add_part_at(CamelMultipart *multipart, CamelMimePart *part, guint index);
-static void signed_remove_part(CamelMultipart *multipart, CamelMimePart *part);
-static CamelMimePart *signed_remove_part_at (CamelMultipart *multipart, guint index);
-static CamelMimePart *signed_get_part(CamelMultipart *multipart, guint index);
-static guint signed_get_number(CamelMultipart *multipart);
-
-static int write_to_stream(CamelDataWrapper *data_wrapper, CamelStream *stream);
-static void set_mime_type_field(CamelDataWrapper *data_wrapper, CamelContentType *mime_type);
-static int construct_from_stream(CamelDataWrapper *data_wrapper, CamelStream *stream);
-static int signed_construct_from_parser(CamelMultipart *multipart, struct _CamelMimeParser *mp);
-
-static CamelMultipartClass *parent_class = NULL;
-
-/* Returns the class for a CamelMultipartSigned */
-#define CMP_CLASS(so) CAMEL_MULTIPART_SIGNED_CLASS (CAMEL_OBJECT_GET_CLASS(so))
-
-/* Returns the class for a CamelDataWrapper */
-#define CDW_CLASS(so) CAMEL_DATA_WRAPPER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
-
-static void
-camel_multipart_signed_class_init (CamelMultipartSignedClass *camel_multipart_signed_class)
-{
- CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS(camel_multipart_signed_class);
- CamelMultipartClass *mpclass = (CamelMultipartClass *)camel_multipart_signed_class;
-
- parent_class = (CamelMultipartClass *)camel_multipart_get_type();
-
- /* virtual method overload */
- camel_data_wrapper_class->construct_from_stream = construct_from_stream;
- camel_data_wrapper_class->write_to_stream = write_to_stream;
- camel_data_wrapper_class->set_mime_type_field = set_mime_type_field;
-
- mpclass->add_part = signed_add_part;
- mpclass->add_part_at = signed_add_part_at;
- mpclass->remove_part = signed_remove_part;
- mpclass->remove_part_at = signed_remove_part_at;
- mpclass->get_part = signed_get_part;
- mpclass->get_number = signed_get_number;
- mpclass->construct_from_parser = signed_construct_from_parser;
-
-/*
- mpclass->get_boundary = signed_get_boundary;
- mpclass->set_boundary = signed_set_boundary;
-*/
-}
-
-static void
-camel_multipart_signed_init (gpointer object, gpointer klass)
-{
- CamelMultipartSigned *multipart = (CamelMultipartSigned *)object;
-
- camel_data_wrapper_set_mime_type(CAMEL_DATA_WRAPPER(multipart), "multipart/signed");
- multipart->start1 = -1;
-}
-
-static void
-camel_multipart_signed_finalize (CamelObject *object)
-{
- CamelMultipartSigned *mps = (CamelMultipartSigned *)object;
-
- g_free(mps->protocol);
- g_free(mps->micalg);
- if (mps->signature)
- camel_object_unref((CamelObject *)mps->signature);
- if (mps->content)
- camel_object_unref((CamelObject *)mps->content);
- if (mps->contentraw)
- camel_object_unref((CamelObject *)mps->contentraw);
-}
-
-CamelType
-camel_multipart_signed_get_type (void)
-{
- static CamelType camel_multipart_signed_type = CAMEL_INVALID_TYPE;
-
- if (camel_multipart_signed_type == CAMEL_INVALID_TYPE) {
- camel_multipart_signed_type = camel_type_register (camel_multipart_get_type (), "CamelMultipartSigned",
- sizeof (CamelMultipartSigned),
- sizeof (CamelMultipartSignedClass),
- (CamelObjectClassInitFunc) camel_multipart_signed_class_init,
- NULL,
- (CamelObjectInitFunc) camel_multipart_signed_init,
- (CamelObjectFinalizeFunc) camel_multipart_signed_finalize);
- }
-
- return camel_multipart_signed_type;
-}
-
-/**
- * camel_multipart_signed_new:
- *
- * Create a new CamelMultipartSigned object.
- *
- * A MultipartSigned should be used to store and create parts of
- * type "multipart/signed". This is because multipart/signed is
- * entirely broken-by-design (tm) and uses completely
- * different semantics to other mutlipart types. It must be treated
- * as opaque data by any transport. See rfc 3156 for details.
- *
- * There are 3 ways to create the part:
- * Use construct_from_stream. If this is used, then you must
- * set the mime_type appropriately to match the data uses, so
- * that the multiple parts my be extracted.
- *
- * Use construct_from_parser. The parser MUST be in the HSCAN_HEADER
- * state, and the current content_type MUST be "multipart/signed" with
- * the appropriate boundary and it SHOULD include the appropriate protocol
- * and hash specifiers.
- *
- * Use sign_part. A signature part will automatically be created
- * and the whole part may be written using write_to_stream to
- * create a 'transport-safe' version (as safe as can be expected with
- * such a broken specification).
- *
- * Return value: a new CamelMultipartSigned
- **/
-CamelMultipartSigned *
-camel_multipart_signed_new (void)
-{
- CamelMultipartSigned *multipart;
-
- multipart = (CamelMultipartSigned *)camel_object_new(CAMEL_MULTIPART_SIGNED_TYPE);
-
- return multipart;
-}
-
-/* find the next boundary @bound from @start, return the start of the actual data
- @end points to the end of the data BEFORE the boundary */
-static char *parse_boundary(char *start, const char *bound, char **end)
-{
- char *data, *begin;
-
- begin = strstr(start, bound);
- if (begin == NULL)
- return NULL;
-
- data = begin+strlen(bound);
- if (begin > start && begin[-1] == '\n')
- begin--;
- if (begin > start && begin[-1] == '\r')
- begin--;
- if (data[0] == '\r')
- data++;
- if (data[0] == '\n')
- data++;
-
- *end = begin;
- return data;
-}
-
-/* yeah yuck.
- Well, we could probably use the normal mime parser, but then it would change our
- headers.
- This is good enough ... till its not! */
-static int
-parse_content(CamelMultipartSigned *mps)
-{
- CamelMultipart *mp = (CamelMultipart *)mps;
- char *start, *end, *start2, *end2, *last, *post;
- CamelStreamMem *mem;
- char *bound;
- const char *boundary;
-
- boundary = camel_multipart_get_boundary(mp);
- if (boundary == NULL) {
- g_warning("Trying to get multipart/signed content without setting boundary first");
- return -1;
- }
-
- /* turn it into a string, and 'fix' it up */
- /* this is extremely dodgey but should work! */
- mem = (CamelStreamMem *)((CamelDataWrapper *)mps)->stream;
- if (mem == NULL) {
- g_warning("Trying to parse multipart/signed without constructing first");
- return -1;
- }
-
- camel_stream_write((CamelStream *)mem, "", 1);
- g_byte_array_set_size(mem->buffer, mem->buffer->len-1);
- last = mem->buffer->data + mem->buffer->len;
-
- bound = alloca(strlen(boundary)+5);
- sprintf(bound, "--%s", boundary);
-
- start = parse_boundary(mem->buffer->data, bound, &end);
- if (start == NULL || start[0] == 0)
- return -1;
-
- if (end > (char *)mem->buffer->data) {
- char *tmp = g_strndup(mem->buffer->data, start-(char *)mem->buffer->data-1);
- camel_multipart_set_preface(mp, tmp);
- g_free(tmp);
- }
-
- start2 = parse_boundary(start, bound, &end);
- if (start2 == NULL || start2[0] == 0)
- return -1;
-
- sprintf(bound, "--%s--", boundary);
- post = parse_boundary(start2, bound, &end2);
- if (post == NULL)
- return -1;
-
- if (post[0])
- camel_multipart_set_postface(mp, post);
-
- mps->start1 = start-(char *)mem->buffer->data;
- mps->end1 = end-(char *)mem->buffer->data;
- mps->start2 = start2-(char *)mem->buffer->data;
- mps->end2 = end2-(char *)mem->buffer->data;
-
- return 0;
-}
-
-/* we snoop the mime type to get boundary and hash info */
-static void
-set_mime_type_field(CamelDataWrapper *data_wrapper, CamelContentType *mime_type)
-{
- CamelMultipartSigned *mps = (CamelMultipartSigned *)data_wrapper;
-
- ((CamelDataWrapperClass *)parent_class)->set_mime_type_field(data_wrapper, mime_type);
- if (mime_type) {
- const char *micalg, *protocol;
-
- protocol = header_content_type_param(mime_type, "protocol");
- g_free(mps->protocol);
- mps->protocol = g_strdup(protocol);
-
- micalg = header_content_type_param(mime_type, "micalg");
- g_free(mps->micalg);
- mps->micalg = g_strdup(micalg);
- }
-}
-
-static void
-signed_add_part(CamelMultipart *multipart, CamelMimePart *part)
-{
- g_warning("Cannot add parts to a signed part using add_part");
-}
-
-static void
-signed_add_part_at(CamelMultipart *multipart, CamelMimePart *part, guint index)
-{
- g_warning("Cannot add parts to a signed part using add_part_at");
-}
-
-static void
-signed_remove_part(CamelMultipart *multipart, CamelMimePart *part)
-{
- g_warning("Cannot remove parts from a signed part using remove_part");
-}
-
-static CamelMimePart *
-signed_remove_part_at (CamelMultipart *multipart, guint index)
-{
- g_warning("Cannot remove parts from a signed part using remove_part");
- return NULL;
-}
-
-static CamelMimePart *
-signed_get_part(CamelMultipart *multipart, guint index)
-{
- CamelMultipartSigned *mps = (CamelMultipartSigned *)multipart;
- CamelDataWrapper *dw = (CamelDataWrapper *)multipart;
- CamelStream *stream;
-
- switch (index) {
- case CAMEL_MULTIPART_SIGNED_CONTENT:
- if (mps->content)
- return mps->content;
- if (mps->contentraw) {
- stream = mps->contentraw;
- camel_object_ref((CamelObject *)stream);
- } else if (mps->start1 == -1
- && parse_content(mps) == -1
- && (stream = ((CamelDataWrapper *)mps)->stream) == NULL) {
- g_warning("Trying to get content on an invalid multipart/signed");
- return NULL;
- } else if (dw->stream == NULL) {
- return NULL;
- } else if (mps->start1 == -1) {
- stream = dw->stream;
- camel_object_ref(stream);
- } else {
- stream = camel_seekable_substream_new((CamelSeekableStream *)dw->stream, mps->start1, mps->end1);
- }
- camel_stream_reset(stream);
- mps->content = camel_mime_part_new();
- camel_data_wrapper_construct_from_stream((CamelDataWrapper *)mps->content, stream);
- camel_object_unref(stream);
- return mps->content;
- case CAMEL_MULTIPART_SIGNED_SIGNATURE:
- if (mps->signature)
- return mps->signature;
- if (mps->start1 == -1
- && parse_content(mps) == -1) {
- g_warning("Trying to get signature on invalid multipart/signed");
- return NULL;
- } else if (dw->stream == NULL) {
- return NULL;
- }
- stream = camel_seekable_substream_new((CamelSeekableStream *)dw->stream, mps->start2, mps->end2);
- camel_stream_reset(stream);
- mps->signature = camel_mime_part_new();
- camel_data_wrapper_construct_from_stream((CamelDataWrapper *)mps->signature, stream);
- camel_object_unref((CamelObject *)stream);
- return mps->signature;
- default:
- g_warning("trying to get object out of bounds for multipart");
- }
-
- return NULL;
-}
-
-static guint
-signed_get_number(CamelMultipart *multipart)
-{
- CamelDataWrapper *dw = (CamelDataWrapper *)multipart;
- CamelMultipartSigned *mps = (CamelMultipartSigned *)multipart;
-
- /* check what we have, so we return something reasonable */
-
- if ((mps->content || mps->contentraw) && mps->signature)
- return 2;
-
- if (mps->start1 == -1 && parse_content(mps) == -1) {
- if (dw->stream == NULL)
- return 0;
- else
- return 1;
- } else {
- return 2;
- }
-}
-
-static void
-set_stream(CamelMultipartSigned *mps, CamelStream *mem)
-{
- CamelDataWrapper *dw = (CamelDataWrapper *)mps;
-
- if (dw->stream)
- camel_object_unref((CamelObject *)dw->stream);
- dw->stream = (CamelStream *)mem;
-
- mps->start1 = -1;
- if (mps->content) {
- camel_object_unref((CamelObject *)mps->content);
- mps->content = NULL;
- }
- if (mps->contentraw) {
- camel_object_unref((CamelObject *)mps->contentraw);
- mps->contentraw = NULL;
- }
- if (mps->signature) {
- camel_object_unref((CamelObject *)mps->signature);
- mps->signature = NULL;
- }
-}
-
-static int
-construct_from_stream(CamelDataWrapper *data_wrapper, CamelStream *stream)
-{
- CamelMultipartSigned *mps = (CamelMultipartSigned *)data_wrapper;
- CamelStream *mem = camel_stream_mem_new();
-
- if (camel_stream_write_to_stream(stream, mem) == -1)
- return -1;
-
- set_stream(mps, mem);
-
- return 0;
-}
-
-static int
-signed_construct_from_parser(CamelMultipart *multipart, struct _CamelMimeParser *mp)
-{
- int err;
- struct _header_content_type *content_type;
- CamelMultipartSigned *mps = (CamelMultipartSigned *)multipart;
- char *buf;
- size_t len;
- CamelStream *mem;
-
- /* we *must not* be in multipart state, otherwise the mime parser will
- parse the headers which is a no no @#$@# stupid multipart/signed spec */
- g_assert(camel_mime_parser_state(mp) == HSCAN_HEADER);
-
- /* All we do is copy it to a memstream */
- content_type = camel_mime_parser_content_type(mp);
- camel_multipart_set_boundary(multipart, header_content_type_param(content_type, "boundary"));
-
- mem = camel_stream_mem_new();
- while (camel_mime_parser_step(mp, &buf, &len) != HSCAN_BODY_END)
- camel_stream_write(mem, buf, len);
-
- set_stream(mps, mem);
-
- err = camel_mime_parser_errno(mp);
- if (err != 0) {
- errno = err;
- return -1;
- } else
- return 0;
-}
-
-static int
-write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream)
-{
- CamelMultipartSigned *mps = (CamelMultipartSigned *)data_wrapper;
- CamelMultipart *mp = (CamelMultipart *)mps;
- const char *boundary;
- int count, total=0;
-
- /* we have 3 basic cases:
- 1. constructed, we write out the data wrapper stream we got
- 2. signed content, we create and write out a new stream
- 3. invalid
- */
-
- /* 1 */
- /* FIXME: locking? */
- if (data_wrapper->stream) {
- camel_stream_reset(data_wrapper->stream);
- return camel_stream_write_to_stream(data_wrapper->stream, stream);
- }
-
- /* 3 */
- if (mps->signature == NULL || mps->contentraw == NULL)
- return -1;
-
- /* 2 */
- boundary = camel_multipart_get_boundary(mp);
- if (mp->preface) {
- count = camel_stream_write_string(stream, mp->preface);
- if (count == -1)
- return -1;
- total += count;
- }
-
- /* first boundary */
- count = camel_stream_printf(stream, "\n--%s\n", boundary);
- if (count == -1)
- return -1;
- total += count;
-
- /* output content part */
- camel_stream_reset(mps->contentraw);
- count = camel_stream_write_to_stream(mps->contentraw, stream);
- if (count == -1)
- return -1;
- total += count;
-
- /* boundary */
- count = camel_stream_printf(stream, "\n--%s\n", boundary);
- if (count == -1)
- return -1;
- total += count;
-
- /* signature */
- count = camel_data_wrapper_write_to_stream((CamelDataWrapper *)mps->signature, stream);
- if (count == -1)
- return -1;
- total += count;
-
- /* write the terminating boudary delimiter */
- count = camel_stream_printf(stream, "\n--%s--\n", boundary);
- if (count == -1)
- return -1;
- total += count;
-
- /* and finally the postface */
- if (mp->postface) {
- count = camel_stream_write_string(stream, mp->postface);
- if (count == -1)
- return -1;
- total += count;
- }
-
- return total;
-}
-
-/* See rfc3156, section 2 and others */
-/* We do this simply: Anything not base64 must be qp
- This is so that we can safely translate any occurance of "From "
- into the quoted-printable escaped version safely. */
-static void
-prepare_sign(CamelMimePart *mime_part)
-{
- CamelDataWrapper *wrapper;
- CamelMimePartEncodingType encoding;
- int parts, i;
-
- wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (mime_part));
- if (!wrapper)
- return;
-
- if (CAMEL_IS_MULTIPART (wrapper)) {
- parts = camel_multipart_get_number((CamelMultipart *)wrapper);
- for (i = 0; i < parts; i++)
- prepare_sign(camel_multipart_get_part((CamelMultipart *)wrapper, i));
- } else if (CAMEL_IS_MIME_MESSAGE (wrapper)) {
- prepare_sign((CamelMimePart *)wrapper);
- } else {
- encoding = camel_mime_part_get_encoding(mime_part);
-
- if (encoding != CAMEL_MIME_PART_ENCODING_BASE64
- && encoding != CAMEL_MIME_PART_ENCODING_QUOTEDPRINTABLE) {
- camel_mime_part_set_encoding(mime_part, CAMEL_MIME_PART_ENCODING_QUOTEDPRINTABLE);
- }
- }
-}
-
-/**
- * camel_multipart_signed_sign:
- * @mps:
- * @context: The CipherContext to use for signing.
- * @content: CamelMimePart content you wish to sign/transport.
- * @userid: The id of the signing key to use.
- * @hash: The algorithm to use.
- * @ex:
- *
- * Sign the part @content, and attach it as the first part
- * (CAMEL_MULTIPART_SIGNED_CONTENT) of the multipart @mps. A
- * signature object will be created and setup as the second part
- * (CAMEL_MULTIPART_SIGNED_SIGNATURE) of the object. Once a part has
- * been successfully signed the mutlipart is ready for transmission.
- *
- * This method should be used to create multipart/signed objects
- * which are properly canoncalised before signing, etc.
- *
- * Return value: -1 on error, setting @ex appropriately. On error
- * neither the content or signature parts will be setup.
- **/
-int
-camel_multipart_signed_sign(CamelMultipartSigned *mps, CamelCipherContext *context, CamelMimePart *content, const char *userid, CamelCipherHash hash, CamelException *ex)
-{
- CamelMimeFilter *canon_filter;
- CamelStream *sigstream, *mem;
- CamelStreamFilter *filter;
- CamelContentType *mime_type;
- CamelMimePart *signature;
- CamelDataWrapper *dw;
- char *type;
-
- /* this needs to be set */
- g_return_val_if_fail(context->sign_protocol != NULL, -1);
-
- prepare_sign(content);
-
- mem = camel_stream_mem_new();
- filter = camel_stream_filter_new_with_stream(mem);
-
- /* Note: see rfc2015 or rfc3156, section 5 */
- canon_filter = camel_mime_filter_canon_new(CAMEL_MIME_FILTER_CANON_STRIP|CAMEL_MIME_FILTER_CANON_CRLF|CAMEL_MIME_FILTER_CANON_FROM);
- camel_stream_filter_add(filter, (CamelMimeFilter *)canon_filter);
- camel_object_unref((CamelObject *)canon_filter);
-
- camel_data_wrapper_write_to_stream((CamelDataWrapper *)content, (CamelStream *)filter);
- camel_stream_flush((CamelStream *)filter);
- camel_object_unref((CamelObject *)filter);
- camel_stream_reset(mem);
-
-#if 0
- printf("-- Signing:\n");
- fwrite(((CamelStreamMem *)mem)->buffer->data, ((CamelStreamMem *)mem)->buffer->len, 1, stdout);
- printf("-- end\n");
-#endif
-
- sigstream = camel_stream_mem_new();
-
- if (camel_cipher_sign(context, userid, hash, mem, sigstream, ex) == -1) {
- camel_object_unref((CamelObject *)mem);
- camel_object_unref((CamelObject *)sigstream);
- return -1;
- }
-
- /* create the signature wrapper object */
- signature = camel_mime_part_new();
- dw = camel_data_wrapper_new();
- type = alloca(strlen(context->sign_protocol) + 32);
- sprintf(type, "%s; name=signature.asc", context->sign_protocol);
- camel_data_wrapper_set_mime_type(dw, type);
- camel_stream_reset(sigstream);
- camel_data_wrapper_construct_from_stream(dw, sigstream);
- camel_object_unref((CamelObject *)sigstream);
- camel_medium_set_content_object((CamelMedium *)signature, dw);
- camel_object_unref((CamelObject *)dw);
- camel_mime_part_set_description(signature, _("This is a digitally signed message part"));
-
- /* setup our mime type and boundary */
- mime_type = header_content_type_new("multipart", "signed");
- header_content_type_set_param(mime_type, "micalg", camel_cipher_hash_to_id(context, hash));
- header_content_type_set_param(mime_type, "protocol", context->sign_protocol);
- camel_data_wrapper_set_mime_type_field(CAMEL_DATA_WRAPPER (mps), mime_type);
- header_content_type_unref(mime_type);
- camel_multipart_set_boundary((CamelMultipart *)mps, NULL);
-
- /* just keep the whole raw content. We dont *really* need to do this because
- we know how we just proccessed it, but, well, better to be safe than sorry */
- mps->signature = signature;
- mps->contentraw = mem;
- camel_stream_reset(mem);
-
- /* clear the data-wrapper stream - tells write_to_stream to use the right object */
- if (((CamelDataWrapper *)mps)->stream) {
- camel_object_unref((CamelObject *) ((CamelDataWrapper *)mps)->stream);
- ((CamelDataWrapper *)mps)->stream = NULL;
- }
-
- return 0;
-}
-
-/**
- * camel_multipart_signed_verify:
- * @mps:
- * @context:
- * @ex:
- *
- * Verify a signed object. This may be used to verify newly signed
- * objects as well as those created from external streams or parsers.
- *
- * Return value: A validity value, or NULL on error, setting @ex
- * appropriately.
- **/
-CamelCipherValidity *
-camel_multipart_signed_verify(CamelMultipartSigned *mps, CamelCipherContext *context, CamelException *ex)
-{
- CamelCipherValidity *valid;
- CamelMimePart *sigpart;
- CamelStream *sigstream, *constream;
-
- /* we need to be able to verify stuff we just signed as well as stuff we loaded from a stream/parser */
-
- if (mps->contentraw) {
- constream = mps->contentraw;
- camel_object_ref((CamelObject *)constream);
- } else {
- CamelStream *sub;
- CamelMimeFilter *canon_filter;
-
- if (mps->start1 == -1 && parse_content(mps) == -1) {
- camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("parse error"));
- return NULL;
- }
-
- /* first, prepare our parts */
- sub = camel_seekable_substream_new((CamelSeekableStream *)((CamelDataWrapper *)mps)->stream, mps->start1, mps->end1);
- constream = (CamelStream *)camel_stream_filter_new_with_stream(sub);
- camel_object_unref((CamelObject *)sub);
-
- /* Note: see rfc2015 or rfc3156, section 5 */
- canon_filter = camel_mime_filter_canon_new (CAMEL_MIME_FILTER_CANON_CRLF);
- camel_stream_filter_add((CamelStreamFilter *)constream, (CamelMimeFilter *)canon_filter);
- camel_object_unref((CamelObject *)canon_filter);
- }
-
- /* we do this as a normal mime part so we can have it handle transfer encoding etc */
- sigstream = camel_stream_mem_new();
- sigpart = camel_multipart_get_part((CamelMultipart *)mps, CAMEL_MULTIPART_SIGNED_SIGNATURE);
- camel_data_wrapper_write_to_stream((CamelDataWrapper *)sigpart, sigstream);
- camel_stream_reset(sigstream);
-
- /* do the magic, the caller must supply the right context for this kind of object */
- valid = camel_cipher_verify(context, camel_cipher_id_to_hash(context, mps->micalg), constream, sigstream, ex);
-
-#if 0
- {
- CamelStream *sout = camel_stream_fs_new_with_fd(dup(0));
-
- camel_stream_printf(sout, "-- Verifying:\n");
- camel_stream_reset(constream);
- camel_stream_write_to_stream(constream, sout);
- camel_stream_printf(sout, "-- end\n");
- camel_object_unref((CamelObject *)sout);
- }
-#endif
-
- camel_object_unref((CamelObject *)constream);
- camel_object_unref((CamelObject *)sigstream);
-
- return valid;
-}
-
-