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/* -*- 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 <stdlib.h>
#include <string.h>
#include "mail-crypto.h"
#include "mail-session.h"
#include "mail-config.h"
/** rfc2633 stuff (aka S/MIME v3) ********************************/
gboolean
mail_crypto_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
mail_crypto_is_pkcs7_mime (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"))
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;
}
/**
* mail_crypto_pgp_mime_part_sign:
* @mime_part: a MIME part that will be replaced by a pgp signed part
* @userid: userid to sign with
* @hash: one of PGP_HASH_TYPE_MD5 or PGP_HASH_TYPE_SHA1
* @ex: exception which will be set if there are any errors.
*
* Constructs a PGP/MIME multipart in compliance with rfc2015 and
* replaces #part with the generated multipart/signed. On failure,
* #ex will be set and #part will remain untouched.
**/
void
mail_crypto_pgp_mime_part_sign (CamelMimePart **mime_part, const char *userid, CamelCipherHash hash, CamelException *ex)
{
CamelPgpContext *context;
context = camel_pgp_context_new (session, mail_config_get_pgp_type (),
mail_config_get_pgp_path ());
if (context) {
camel_pgp_mime_part_sign (context, mime_part, userid, hash, ex);
camel_object_unref (CAMEL_OBJECT (context));
}
}
/**
* mail_crypto_pgp_mime_part_verify:
* @mime_part: a multipart/signed MIME Part
* @ex: exception
*
* Returns a PgpValidity on success or NULL on fail.
**/
CamelCipherValidity *
mail_crypto_pgp_mime_part_verify (CamelMimePart *mime_part, CamelException *ex)
{
CamelCipherValidity *valid = NULL;
CamelPgpContext *context;
context = camel_pgp_context_new (session, mail_config_get_pgp_type (),
mail_config_get_pgp_path ());
if (context) {
valid = camel_pgp_mime_part_verify (context, mime_part, ex);
camel_object_unref (CAMEL_OBJECT (context));
}
return valid;
}
/**
* mail_crypto_pgp_mime_part_encrypt:
* @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
mail_crypto_pgp_mime_part_encrypt (CamelMimePart **mime_part, GPtrArray *recipients, CamelException *ex)
{
CamelPgpContext *context;
context = camel_pgp_context_new (session, mail_config_get_pgp_type (),
mail_config_get_pgp_path ());
if (context) {
camel_pgp_mime_part_encrypt (context, mime_part, recipients, ex);
camel_object_unref (CAMEL_OBJECT (context));
}
}
/**
* mail_crypto_pgp_mime_part_decrypt:
* @mime_part: a multipart/encrypted MIME Part
* @ex: exception
*
* Returns the decrypted MIME Part on success or NULL on fail.
**/
CamelMimePart *
mail_crypto_pgp_mime_part_decrypt (CamelMimePart *mime_part, CamelException *ex)
{
CamelPgpContext *context;
CamelMimePart *part = NULL;
context = camel_pgp_context_new (session, mail_config_get_pgp_type (),
mail_config_get_pgp_path ());
if (context) {
part = camel_pgp_mime_part_decrypt (context, mime_part, ex);
camel_object_unref (CAMEL_OBJECT (context));
}
return part;
}
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