aboutsummaryrefslogtreecommitdiffstats
path: root/camel/camel-smime.c
diff options
context:
space:
mode:
authorJeffrey Stedfast <fejj@ximian.com>2001-06-01 04:15:35 +0800
committerJeffrey Stedfast <fejj@src.gnome.org>2001-06-01 04:15:35 +0800
commitfb099f5619f60f6c47658c052fae8d9a597b86d6 (patch)
tree36a17e4f354ba594f36efb819a5e2460f2596512 /camel/camel-smime.c
parent9e7473e1de1484de4720205b437f824fb2b0c615 (diff)
downloadgsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.tar
gsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.tar.gz
gsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.tar.bz2
gsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.tar.lz
gsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.tar.xz
gsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.tar.zst
gsoc2013-evolution-fb099f5619f60f6c47658c052fae8d9a597b86d6.zip
New virtual class for manipulating cryptographic message syntax messages
2001-05-31 Jeffrey Stedfast <fejj@ximian.com> * camel-cms-context.[c,h]: New virtual class for manipulating cryptographic message syntax messages (like S/MIME). * camel-smime-context.[c,h]: Modified to inherit from the CamelCMSContext class rather than the CamelCipherContext class. * camel-smime.[c,h]: Removed - just use camel-smime-context directly. * camel-smime-utils.[c,h]: New source files. Moved the 2 useful functions from camel-smime.[c,h] into here. svn path=/trunk/; revision=10065
Diffstat (limited to 'camel/camel-smime.c')
-rw-r--r--camel/camel-smime.c504
1 files changed, 0 insertions, 504 deletions
diff --git a/camel/camel-smime.c b/camel/camel-smime.c
deleted file mode 100644
index 587fcb6057..0000000000
--- a/camel/camel-smime.c
+++ /dev/null
@@ -1,504 +0,0 @@
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/*
- * Authors: Jeffrey Stedfast <fejj@ximian.com>
- *
- * Copyright 2001 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 "camel-smime.h"
-#include "camel-mime-filter-from.h"
-#include "camel-mime-filter-crlf.h"
-#include "camel-stream-filter.h"
-#include "camel-stream-mem.h"
-#include "camel-multipart.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define d(x) x
-
-/** rfc2633 stuff (aka S/MIME v3) ********************************/
-
-gboolean
-camel_smime_is_smime_v3_signed (CamelMimePart *mime_part)
-{
- CamelDataWrapper *wrapper;
- CamelMultipart *mp;
- CamelMimePart *part;
- CamelContentType *type;
- const gchar *param, *micalg;
- int nparts;
-
- /* check that we have a multipart/signed */
- type = camel_mime_part_get_content_type (mime_part);
- if (!header_content_type_is (type, "multipart", "signed"))
- return FALSE;
-
- /* check that we have a protocol param with the value: "application/pkcs7-signature" */
- param = header_content_type_param (type, "protocol");
- if (!param || g_strcasecmp (param, "application/pkcs7-signature"))
- return FALSE;
-
- /* check that we have a micalg parameter */
- micalg = header_content_type_param (type, "micalg");
- if (!micalg)
- return FALSE;
-
- /* check that we have exactly 2 subparts */
- wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (mime_part));
- mp = CAMEL_MULTIPART (wrapper);
- nparts = camel_multipart_get_number (mp);
- if (nparts != 2)
- return FALSE;
-
- /* The first part may be of any type except for
- * application/pkcs7-signature - check it. */
- part = camel_multipart_get_part (mp, 0);
- type = camel_mime_part_get_content_type (part);
- if (header_content_type_is (type, "application", "pkcs7-signature"))
- return FALSE;
-
- /* The second part should be application/pkcs7-signature. */
- part = camel_multipart_get_part (mp, 1);
- type = camel_mime_part_get_content_type (part);
- if (!header_content_type_is (type, "application", "pkcs7-signature"))
- return FALSE;
-
- return TRUE;
-}
-
-gboolean
-camel_smime_is_smime_v3_encrypted (CamelMimePart *mime_part)
-{
- char *types[] = { "p7m", "p7c", "p7s", NULL };
- const gchar *param, *filename;
- CamelContentType *type;
- int i;
-
- /* check that we have a application/pkcs7-mime part */
- type = camel_mime_part_get_content_type (mime_part);
- if (header_content_type_is (type, "application", "pkcs7-mime")) {
- /* check to make sure it's an encrypted pkcs7-mime part? */
- return TRUE;
- }
-
- if (header_content_type_is (type, "application", "octent-stream")) {
- /* check to see if we have a paremeter called "smime-type" */
- param = header_content_type_param (type, "smime-type");
- if (param)
- return TRUE;
-
- /* check to see if there is a name param and if it has a smime extension */
- param = header_content_type_param (type, "smime-type");
- if (param && *param && strlen (param) > 4) {
- for (i = 0; types[i]; i++)
- if (!g_strcasecmp (param + strlen (param)-4, types[i]))
- return TRUE;
- }
-
- /* check to see if there is a name param and if it has a smime extension */
- filename = camel_mime_part_get_filename (mime_part);
- if (filename && *filename && strlen (filename) > 4) {
- for (i = 0; types[i]; i++)
- if (!g_strcasecmp (filename + strlen (filename)-4, types[i]))
- return TRUE;
- }
- }
-
- return FALSE;
-}
-
-
-static void
-smime_part_sign_restore_part (CamelMimePart *mime_part, GSList *encodings)
-{
- CamelDataWrapper *wrapper;
-
- wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (mime_part));
- if (!wrapper)
- return;
-
- if (CAMEL_IS_MULTIPART (wrapper)) {
- int parts, i;
-
- parts = camel_multipart_get_number (CAMEL_MULTIPART (wrapper));
- for (i = 0; i < parts; i++) {
- CamelMimePart *part = camel_multipart_get_part (CAMEL_MULTIPART (wrapper), i);
-
- smime_part_sign_restore_part (part, encodings);
- encodings = encodings->next;
- }
- } else {
- CamelMimePartEncodingType encoding;
-
- encoding = GPOINTER_TO_INT (encodings->data);
-
- camel_mime_part_set_encoding (mime_part, encoding);
- }
-}
-
-static void
-smime_part_sign_prepare_part (CamelMimePart *mime_part, GSList **encodings)
-{
- CamelDataWrapper *wrapper;
- 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 (CAMEL_MULTIPART (wrapper));
- for (i = 0; i < parts; i++) {
- CamelMimePart *part = camel_multipart_get_part (CAMEL_MULTIPART (wrapper), i);
-
- smime_part_sign_prepare_part (part, encodings);
- }
- } else {
- CamelMimePartEncodingType encoding;
-
- encoding = camel_mime_part_get_encoding (mime_part);
-
- /* FIXME: find the best encoding for this part and use that instead?? */
- /* the encoding should really be QP or Base64 */
- if (encoding != CAMEL_MIME_PART_ENCODING_BASE64)
- camel_mime_part_set_encoding (mime_part, CAMEL_MIME_PART_ENCODING_QUOTEDPRINTABLE);
-
- *encodings = g_slist_append (*encodings, GINT_TO_POINTER (encoding));
- }
-}
-
-
-/**
- * camel_smime_part_sign:
- * @context: S/MIME Context
- * @mime_part: a MIME part that will be replaced by an S/MIME signed part
- * @userid: userid to sign with
- * @hash: one of CAMEL_CIPHER_HASH_TYPE_MD5 or CAMEL_CIPHER_HASH_TYPE_SHA1
- * @ex: exception which will be set if there are any errors.
- *
- * Constructs a S/MIME multipart in compliance with rfc2015/rfc2633 and
- * replaces @part with the generated multipart/signed. On failure,
- * @ex will be set and #part will remain untouched.
- **/
-void
-camel_smime_part_sign (CamelSMimeContext *context, CamelMimePart **mime_part, const char *userid,
- CamelCipherHash hash, CamelException *ex)
-{
- CamelMimePart *part, *signed_part;
- CamelMultipart *multipart;
- CamelContentType *mime_type;
- CamelStreamFilter *filtered_stream;
- CamelMimeFilter *crlf_filter, *from_filter;
- CamelStream *stream, *sigstream;
- gchar *hash_type = NULL;
- GSList *encodings = NULL;
-
- g_return_if_fail (*mime_part != NULL);
- g_return_if_fail (CAMEL_IS_MIME_PART (*mime_part));
- g_return_if_fail (userid != NULL);
-
- part = *mime_part;
-
- /* Prepare all the parts for signing... */
- smime_part_sign_prepare_part (part, &encodings);
-
- /* get the cleartext */
- stream = camel_stream_mem_new ();
- crlf_filter = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE,
- CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
- from_filter = CAMEL_MIME_FILTER (camel_mime_filter_from_new ());
- filtered_stream = camel_stream_filter_new_with_stream (stream);
- camel_stream_filter_add (filtered_stream, CAMEL_MIME_FILTER (crlf_filter));
- camel_object_unref (CAMEL_OBJECT (crlf_filter));
- camel_stream_filter_add (filtered_stream, CAMEL_MIME_FILTER (from_filter));
- camel_object_unref (CAMEL_OBJECT (from_filter));
- camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (part), CAMEL_STREAM (filtered_stream));
- camel_object_unref (CAMEL_OBJECT (filtered_stream));
-
- /* reset the stream */
- camel_stream_reset (stream);
-
- /* construct the signature stream */
- sigstream = camel_stream_mem_new ();
-
- switch (hash) {
- case CAMEL_CIPHER_HASH_MD5:
- hash_type = "md5";
- break;
- case CAMEL_CIPHER_HASH_SHA1:
- hash_type = "sha1";
- break;
- default:
- /* set a reasonable default */
- hash = CAMEL_CIPHER_HASH_SHA1;
- hash_type = "sha1";
- break;
- }
-
- /* get the signature */
- if (camel_smime_sign (context, userid, hash, stream, sigstream, ex) == -1) {
- camel_object_unref (CAMEL_OBJECT (stream));
- camel_object_unref (CAMEL_OBJECT (sigstream));
-
- /* restore the original encoding */
- smime_part_sign_restore_part (part, encodings);
- g_slist_free (encodings);
- return;
- }
-
- camel_object_unref (CAMEL_OBJECT (stream));
- camel_stream_reset (sigstream);
-
- /* we don't need these anymore... */
- g_slist_free (encodings);
-
- /* construct the pkcs7-signature mime part */
- signed_part = camel_mime_part_new ();
- camel_mime_part_set_content (signed_part, CAMEL_STREAM_MEM (sigstream)->buffer->data,
- CAMEL_STREAM_MEM (sigstream)->buffer->len,
- "application/pkcs7-signature");
- camel_object_unref (CAMEL_OBJECT (sigstream));
- camel_mime_part_set_encoding (signed_part, CAMEL_MIME_PART_ENCODING_BASE64);
- camel_mime_part_set_filename (signed_part, "smime.p7s");
-
- /* construct the container multipart/signed */
- multipart = camel_multipart_new ();
-
- mime_type = header_content_type_new ("multipart", "signed");
- header_content_type_set_param (mime_type, "micalg", hash_type);
- header_content_type_set_param (mime_type, "protocol", "application/pkcs7-signature");
- camel_data_wrapper_set_mime_type_field (CAMEL_DATA_WRAPPER (multipart), mime_type);
- header_content_type_unref (mime_type);
-
- camel_multipart_set_boundary (multipart, NULL);
-
- /* add the parts to the multipart */
- camel_multipart_add_part (multipart, part);
- camel_object_unref (CAMEL_OBJECT (part));
- camel_multipart_add_part (multipart, signed_part);
- camel_object_unref (CAMEL_OBJECT (signed_part));
-
- /* replace the input part with the output part */
- *mime_part = camel_mime_part_new ();
- camel_medium_set_content_object (CAMEL_MEDIUM (*mime_part),
- CAMEL_DATA_WRAPPER (multipart));
- camel_object_unref (CAMEL_OBJECT (multipart));
-}
-
-struct {
- char *name;
- CamelCipherHash hash;
-} known_hash_types[] = {
- { "md5", CAMEL_CIPHER_HASH_MD5 },
- { "rsa-md5", CAMEL_CIPHER_HASH_MD5 },
- { "sha1", CAMEL_CIPHER_HASH_SHA1 },
- { "rsa-sha1", CAMEL_CIPHER_HASH_SHA1 },
- { NULL, CAMEL_CIPHER_HASH_DEFAULT }
-};
-
-static CamelCipherHash
-get_hash_type (const char *string)
-{
- int i;
-
- for (i = 0; known_hash_types[i].name; i++)
- if (!g_strcasecmp (known_hash_types[i].name, string))
- return known_hash_types[i].hash;
-
- return CAMEL_CIPHER_HASH_DEFAULT;
-}
-
-/**
- * camel_smime_part_verify:
- * @context: S/MIME Context
- * @mime_part: a multipart/signed MIME Part
- * @ex: exception
- *
- * Returns a CamelCipherValidity on success or NULL on fail.
- **/
-CamelCipherValidity *
-camel_smime_part_verify (CamelSMimeContext *context, CamelMimePart *mime_part, CamelException *ex)
-{
- CamelDataWrapper *wrapper;
- CamelMultipart *multipart;
- CamelMimePart *part, *sigpart;
- CamelStreamFilter *filtered_stream;
- CamelMimeFilter *crlf_filter, *from_filter;
- CamelStream *stream, *sigstream;
- CamelContentType *type;
- CamelCipherValidity *valid;
- CamelCipherHash hash;
- const char *hash_str;
-
- g_return_val_if_fail (mime_part != NULL, NULL);
- g_return_val_if_fail (CAMEL_IS_MIME_PART (mime_part), NULL);
-
- if (!camel_smime_is_smime_v3_signed (mime_part))
- return NULL;
-
- wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (mime_part));
- multipart = CAMEL_MULTIPART (wrapper);
-
- /* get the plain part */
- part = camel_multipart_get_part (multipart, 0);
- stream = camel_stream_mem_new ();
- crlf_filter = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE,
- CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
- from_filter = CAMEL_MIME_FILTER (camel_mime_filter_from_new ());
- filtered_stream = camel_stream_filter_new_with_stream (stream);
- camel_stream_filter_add (filtered_stream, CAMEL_MIME_FILTER (crlf_filter));
- camel_object_unref (CAMEL_OBJECT (crlf_filter));
- camel_stream_filter_add (filtered_stream, CAMEL_MIME_FILTER (from_filter));
- camel_object_unref (CAMEL_OBJECT (from_filter));
- camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (part), CAMEL_STREAM (filtered_stream));
- camel_object_unref (CAMEL_OBJECT (filtered_stream));
- camel_stream_reset (stream);
-
- /* get the signed part */
- sigpart = camel_multipart_get_part (multipart, 1);
- sigstream = camel_stream_mem_new ();
- camel_data_wrapper_write_to_stream (camel_medium_get_content_object (CAMEL_MEDIUM (sigpart)),
- sigstream);
- camel_stream_reset (sigstream);
-
- /* verify */
- type = camel_mime_part_get_content_type (sigpart);
- hash_str = header_content_type_param (type, "micalg");
- hash = get_hash_type (hash_str);
- valid = camel_smime_verify (context, hash, stream, sigstream, ex);
-
- camel_object_unref (CAMEL_OBJECT (sigstream));
- camel_object_unref (CAMEL_OBJECT (stream));
-
- return valid;
-}
-
-
-/**
- * camel_smime_part_encrypt:
- * @context: S/MIME Context
- * @mime_part: a MIME part that will be replaced by a pgp encrypted part
- * @recipients: list of recipient PGP Key IDs
- * @ex: exception which will be set if there are any errors.
- *
- * Constructs a PGP/MIME multipart in compliance with rfc2015 and
- * replaces #mime_part with the generated multipart/signed. On failure,
- * #ex will be set and #part will remain untouched.
- **/
-void
-camel_smime_part_encrypt (CamelSMimeContext *context, CamelMimePart **mime_part,
- GPtrArray *recipients, CamelException *ex)
-{
- CamelMimePart *part, *encrypted_part;
- CamelStreamFilter *filtered_stream;
- CamelMimeFilter *crlf_filter;
- CamelStream *stream, *ciphertext;
-
- g_return_if_fail (*mime_part != NULL);
- g_return_if_fail (CAMEL_IS_MIME_PART (*mime_part));
- g_return_if_fail (recipients != NULL);
-
- part = *mime_part;
-
- /* get the contents */
- stream = camel_stream_mem_new ();
- crlf_filter = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE,
- CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
- filtered_stream = camel_stream_filter_new_with_stream (stream);
- camel_stream_filter_add (filtered_stream, CAMEL_MIME_FILTER (crlf_filter));
- camel_object_unref (CAMEL_OBJECT (crlf_filter));
- camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (part), CAMEL_STREAM (filtered_stream));
- camel_object_unref (CAMEL_OBJECT (filtered_stream));
- camel_stream_reset (stream);
-
- /* smime encrypt */
- ciphertext = camel_stream_mem_new ();
- if (camel_smime_encrypt (context, FALSE, NULL, recipients, stream, ciphertext, ex) == -1) {
- camel_object_unref (CAMEL_OBJECT (stream));
- camel_object_unref (CAMEL_OBJECT (ciphertext));
- return;
- }
-
- camel_object_unref (CAMEL_OBJECT (stream));
- camel_stream_reset (ciphertext);
-
- /* construct the encrypted mime part */
- encrypted_part = camel_mime_part_new ();
- camel_mime_part_set_content (encrypted_part, CAMEL_STREAM_MEM (ciphertext)->buffer->data,
- CAMEL_STREAM_MEM (ciphertext)->buffer->len,
- "application/pkcs7-mime; smime-type=enveloped-data");
- camel_mime_part_set_encoding (encrypted_part, CAMEL_MIME_PART_ENCODING_BASE64);
- camel_object_unref (CAMEL_OBJECT (ciphertext));
-
- /* replace the input part with the output part */
- camel_object_unref (CAMEL_OBJECT (*mime_part));
- *mime_part = encrypted_part;
-}
-
-
-/**
- * camel_smime_part_decrypt:
- * @context: S/MIME Context
- * @mime_part: a S/MIME encrypted MIME Part
- * @ex: exception
- *
- * Returns the decrypted MIME Part on success or NULL on fail.
- **/
-CamelMimePart *
-camel_smime_part_decrypt (CamelSMimeContext *context, CamelMimePart *mime_part, CamelException *ex)
-{
- CamelMimePart *part;
- CamelStream *stream, *ciphertext;
-
- g_return_val_if_fail (mime_part != NULL, NULL);
- g_return_val_if_fail (CAMEL_IS_MIME_PART (mime_part), NULL);
-
- /* make sure the mime part is a S/MIME encrypted */
- if (!camel_smime_is_smime_v3_encrypted (mime_part))
- return NULL;
-
- /* get the ciphertext */
- ciphertext = camel_stream_mem_new ();
- camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (mime_part), ciphertext);
- camel_stream_reset (ciphertext);
-
- /* get the cleartext */
- stream = camel_stream_mem_new ();
- if (camel_smime_decrypt (context, ciphertext, stream, ex) == -1) {
- camel_object_unref (CAMEL_OBJECT (ciphertext));
- camel_object_unref (CAMEL_OBJECT (stream));
- return NULL;
- }
-
- camel_object_unref (CAMEL_OBJECT (ciphertext));
- camel_stream_reset (stream);
-
- /* construct the new decrypted mime part from the stream */
- part = camel_mime_part_new ();
- camel_data_wrapper_construct_from_stream (CAMEL_DATA_WRAPPER (part), stream);
- camel_object_unref (CAMEL_OBJECT (stream));
-
- return part;
-}