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-rw-r--r--camel/camel-cipher-context.c585
1 files changed, 0 insertions, 585 deletions
diff --git a/camel/camel-cipher-context.c b/camel/camel-cipher-context.c
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--- a/camel/camel-cipher-context.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 2001-2003 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
-
-#include <pthread.h>
-#include <string.h>
-
-#include <glib.h>
-
-#include "camel-cipher-context.h"
-#include "camel-stream.h"
-
-#include "camel-mime-utils.h"
-#include "camel-medium.h"
-#include "camel-multipart.h"
-#include "camel-mime-message.h"
-#include "camel-mime-filter-canon.h"
-#include "camel-stream-filter.h"
-
-#define CIPHER_LOCK(ctx) g_mutex_lock (((CamelCipherContext *) ctx)->priv->lock)
-#define CIPHER_UNLOCK(ctx) g_mutex_unlock (((CamelCipherContext *) ctx)->priv->lock);
-
-#define d(x)
-
-#define CCC_CLASS(o) CAMEL_CIPHER_CONTEXT_CLASS(CAMEL_OBJECT_GET_CLASS(o))
-
-struct _CamelCipherContextPrivate {
- GMutex *lock;
-};
-
-static CamelObjectClass *parent_class = NULL;
-
-/**
- * camel_cipher_context_new:
- * @session: CamelSession
- *
- * This creates a new CamelCipherContext object which is used to sign,
- * verify, encrypt and decrypt streams.
- *
- * Return value: the new CamelCipherContext
- **/
-CamelCipherContext *
-camel_cipher_context_new (CamelSession *session)
-{
- CamelCipherContext *context;
-
- g_return_val_if_fail (session != NULL, NULL);
-
- context = CAMEL_CIPHER_CONTEXT (camel_object_new (CAMEL_CIPHER_CONTEXT_TYPE));
-
- camel_object_ref (session);
- context->session = session;
-
- return context;
-}
-
-/**
- * camel_cipher_context_construct:
- * @context: CamelCipherContext
- * @session: CamelSession
- *
- * Constucts the CamelCipherContext
- **/
-void
-camel_cipher_context_construct (CamelCipherContext *context, CamelSession *session)
-{
- g_return_if_fail (CAMEL_IS_CIPHER_CONTEXT (context));
- g_return_if_fail (CAMEL_IS_SESSION (session));
-
- camel_object_ref (session);
- context->session = session;
-}
-
-static int
-cipher_sign (CamelCipherContext *ctx, const char *userid, CamelCipherHash hash,
- struct _CamelMimePart *ipart, struct _CamelMimePart *opart, CamelException *ex)
-{
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Signing is not supported by this cipher"));
- return -1;
-}
-
-/**
- * camel_cipher_sign:
- * @context: Cipher Context
- * @userid: private key to use to sign the stream
- * @hash: preferred Message-Integrity-Check hash algorithm
- * @ipart: Input part.
- * @opart: output part.
- * @ex: exception
- *
- * Converts the (unsigned) part @ipart into a new self-contained mime part @opart.
- * This may be a multipart/signed part, or a simple part for enveloped types.
- *
- * Return value: 0 for success or -1 for failure.
- **/
-int
-camel_cipher_sign (CamelCipherContext *context, const char *userid, CamelCipherHash hash,
- struct _CamelMimePart *ipart, struct _CamelMimePart *opart, CamelException *ex)
-{
- int retval;
-
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), -1);
-
- CIPHER_LOCK(context);
-
- retval = CCC_CLASS (context)->sign (context, userid, hash, ipart, opart, ex);
-
- CIPHER_UNLOCK(context);
-
- return retval;
-}
-
-static CamelCipherValidity *
-cipher_verify (CamelCipherContext *context, struct _CamelMimePart *sigpart, CamelException *ex)
-{
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Verifying is not supported by this cipher"));
- return NULL;
-}
-
-/**
- * camel_cipher_verify:
- * @context: Cipher Context
- * @ipart: part to verify
- * @ex: exception
- *
- * Verifies the signature. If @istream is a clearsigned stream,
- * you should pass %NULL as the sigstream parameter. Otherwise
- * @sigstream is assumed to be the signature stream and is used to
- * verify the integirity of the @istream.
- *
- * Return value: a CamelCipherValidity structure containing information
- * about the integrity of the input stream or %NULL on failure to
- * execute at all.
- **/
-CamelCipherValidity *
-camel_cipher_verify (CamelCipherContext *context, struct _CamelMimePart *ipart, CamelException *ex)
-{
- CamelCipherValidity *valid;
-
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), NULL);
-
- CIPHER_LOCK(context);
-
- valid = CCC_CLASS (context)->verify (context, ipart, ex);
-
- CIPHER_UNLOCK(context);
-
- return valid;
-}
-
-static int
-cipher_encrypt (CamelCipherContext *context, const char *userid, GPtrArray *recipients,
- struct _CamelMimePart *ipart, struct _CamelMimePart *opart, CamelException *ex)
-{
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Encryption is not supported by this cipher"));
- return -1;
-}
-
-/**
- * camel_cipher_encrypt:
- * @context: Cipher Context
- * @userid: key id (or email address) to use when signing, or NULL to not sign.
- * @recipients: an array of recipient key ids and/or email addresses
- * @istream: cleartext input stream
- * @ostream: ciphertext output stream
- * @ex: exception
- *
- * Encrypts (and optionally signs) the cleartext input stream and
- * writes the resulting ciphertext to the output stream.
- *
- * Return value: 0 for success or -1 for failure.
- **/
-int
-camel_cipher_encrypt (CamelCipherContext *context, const char *userid, GPtrArray *recipients,
- struct _CamelMimePart *ipart, struct _CamelMimePart *opart, CamelException *ex)
-{
- int retval;
-
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), -1);
-
- CIPHER_LOCK(context);
-
- retval = CCC_CLASS (context)->encrypt (context, userid, recipients, ipart, opart, ex);
-
- CIPHER_UNLOCK(context);
-
- return retval;
-}
-
-static CamelCipherValidity *
-cipher_decrypt(CamelCipherContext *context, struct _CamelMimePart *ipart, struct _CamelMimePart *opart, CamelException *ex)
-{
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Decryption is not supported by this cipher"));
- return NULL;
-}
-
-/**
- * camel_cipher_decrypt:
- * @context:
- * @ipart:
- * @opart:
- * @ex:
- *
- * Decrypts @ipart into @opart.
- *
- * Return value: A validity/encryption status.
- **/
-CamelCipherValidity *
-camel_cipher_decrypt(CamelCipherContext *context, struct _CamelMimePart *ipart, struct _CamelMimePart *opart, CamelException *ex)
-{
- CamelCipherValidity *valid;
-
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), NULL);
-
- CIPHER_LOCK(context);
-
- valid = CCC_CLASS (context)->decrypt (context, ipart, opart, ex);
-
- CIPHER_UNLOCK(context);
-
- return valid;
-}
-
-static int
-cipher_import_keys (CamelCipherContext *context, struct _CamelStream *istream, CamelException *ex)
-{
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("You may not import keys with this cipher"));
-
- return -1;
-}
-
-/**
- * camel_cipher_import_keys:
- * @ctx: Cipher Context
- * @istream: input stream (containing keys)
- * @ex: exception
- *
- * Imports a stream of keys/certificates contained within @istream
- * into the key/certificate database controlled by @ctx.
- *
- * Returns 0 on success or -1 on fail.
- **/
-int
-camel_cipher_import_keys (CamelCipherContext *context, struct _CamelStream *istream, CamelException *ex)
-{
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), -1);
- g_return_val_if_fail (CAMEL_IS_STREAM (istream), -1);
-
- return CCC_CLASS (context)->import_keys (context, istream, ex);
-}
-
-static int
-cipher_export_keys (CamelCipherContext *context, GPtrArray *keys,
- struct _CamelStream *ostream, CamelException *ex)
-{
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("You may not export keys with this cipher"));
-
- return -1;
-}
-
-/**
- * camel_cipher_export_keys:
- * @ctx: Cipher Context
- * @keys: an array of key ids
- * @ostream: output stream
- * @ex: exception
- *
- * Exports the keys/certificates in @keys to the stream @ostream from
- * the key/certificate database controlled by @ctx.
- *
- * Returns 0 on success or -1 on fail.
- **/
-int
-camel_cipher_export_keys (CamelCipherContext *context, GPtrArray *keys,
- struct _CamelStream *ostream, CamelException *ex)
-{
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), -1);
- g_return_val_if_fail (CAMEL_IS_STREAM (ostream), -1);
- g_return_val_if_fail (keys != NULL, -1);
-
- return CCC_CLASS (context)->export_keys (context, keys, ostream, ex);
-}
-
-static CamelCipherHash
-cipher_id_to_hash(CamelCipherContext *context, const char *id)
-{
- return CAMEL_CIPHER_HASH_DEFAULT;
-}
-
-/* a couple of util functions */
-CamelCipherHash
-camel_cipher_id_to_hash(CamelCipherContext *context, const char *id)
-{
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), CAMEL_CIPHER_HASH_DEFAULT);
-
- return CCC_CLASS (context)->id_to_hash (context, id);
-}
-
-static const char *
-cipher_hash_to_id(CamelCipherContext *context, CamelCipherHash hash)
-{
- return NULL;
-}
-
-const char *
-camel_cipher_hash_to_id(CamelCipherContext *context, CamelCipherHash hash)
-{
- g_return_val_if_fail (CAMEL_IS_CIPHER_CONTEXT (context), NULL);
-
- return CCC_CLASS (context)->hash_to_id (context, hash);
-}
-
-/* Cipher Validity stuff */
-
-CamelCipherValidity *
-camel_cipher_validity_new (void)
-{
- CamelCipherValidity *validity;
-
- validity = g_malloc(sizeof(*validity));
- camel_cipher_validity_init(validity);
-
- return validity;
-}
-
-void
-camel_cipher_validity_init (CamelCipherValidity *validity)
-{
- g_assert (validity != NULL);
-
- memset(validity, 0, sizeof(*validity));
- e_dlist_init(&validity->children);
-}
-
-gboolean
-camel_cipher_validity_get_valid (CamelCipherValidity *validity)
-{
- return validity != NULL
- && validity->sign.status == CAMEL_CIPHER_VALIDITY_SIGN_GOOD;
-}
-
-void
-camel_cipher_validity_set_valid (CamelCipherValidity *validity, gboolean valid)
-{
- g_assert (validity != NULL);
-
- validity->sign.status = valid?CAMEL_CIPHER_VALIDITY_SIGN_GOOD:CAMEL_CIPHER_VALIDITY_SIGN_BAD;
-}
-
-gchar *
-camel_cipher_validity_get_description (CamelCipherValidity *validity)
-{
- if (validity == NULL)
- return NULL;
-
- return validity->sign.description;
-}
-
-void
-camel_cipher_validity_set_description (CamelCipherValidity *validity, const gchar *description)
-{
- g_assert (validity != NULL);
-
- g_free(validity->sign.description);
- validity->sign.description = g_strdup(description);
-}
-
-void
-camel_cipher_validity_clear (CamelCipherValidity *validity)
-{
- g_assert (validity != NULL);
-
- g_free(validity->sign.description);
- g_free(validity->encrypt.description);
- camel_cipher_validity_init(validity);
-}
-
-CamelCipherValidity *
-camel_cipher_validity_clone(CamelCipherValidity *vin)
-{
- CamelCipherValidity *vo;
-
- vo = camel_cipher_validity_new();
- vo->sign.status = vin->sign.status;
- vo->sign.description = g_strdup(vin->sign.description);
- vo->encrypt.status = vin->encrypt.status;
- vo->encrypt.description = g_strdup(vin->encrypt.description);
-
- return vo;
-}
-
-/**
- * camel_cipher_validity_envelope:
- * @validity:
- * @outer:
- *
- * Calculate a conglomerate validity based on wrapping one secure part inside
- * another one.
- **/
-void
-camel_cipher_validity_envelope(CamelCipherValidity *parent, CamelCipherValidity *valid)
-{
- if (parent->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE
- && parent->encrypt.status == CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE
- && valid->sign.status == CAMEL_CIPHER_VALIDITY_SIGN_NONE
- && valid->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE) {
- /* case 1: only signed inside only encrypted -> merge both */
- parent->encrypt.status = valid->encrypt.status;
- parent->encrypt.description = g_strdup(valid->encrypt.description);
- } else if (parent->sign.status == CAMEL_CIPHER_VALIDITY_SIGN_NONE
- && parent->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE
- && valid->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE
- && valid->encrypt.status == CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE) {
- /* case 2: only encrypted inside only signed */
- parent->sign.status = valid->sign.status;
- parent->sign.description = g_strdup(valid->sign.description);
- }
- /* Otherwise, I dunno - what do you do? */
-}
-
-void
-camel_cipher_validity_free (CamelCipherValidity *validity)
-{
- CamelCipherValidity *child;
-
- if (validity == NULL)
- return;
-
- while ((child = (CamelCipherValidity *)e_dlist_remhead(&validity->children)))
- camel_cipher_validity_free(child);
-
- camel_cipher_validity_clear(validity);
- g_free(validity);
-}
-
-/* ********************************************************************** */
-
-static void
-camel_cipher_context_init (CamelCipherContext *context)
-{
- context->priv = g_new0 (struct _CamelCipherContextPrivate, 1);
- context->priv->lock = g_mutex_new ();
-}
-
-static void
-camel_cipher_context_finalise (CamelObject *o)
-{
- CamelCipherContext *context = (CamelCipherContext *)o;
-
- camel_object_unref (CAMEL_OBJECT (context->session));
-
- g_mutex_free (context->priv->lock);
-
- g_free (context->priv);
-}
-
-static void
-camel_cipher_context_class_init (CamelCipherContextClass *camel_cipher_context_class)
-{
- parent_class = camel_type_get_global_classfuncs (camel_object_get_type ());
-
- camel_cipher_context_class->hash_to_id = cipher_hash_to_id;
- camel_cipher_context_class->id_to_hash = cipher_id_to_hash;
- camel_cipher_context_class->sign = cipher_sign;
- camel_cipher_context_class->verify = cipher_verify;
- camel_cipher_context_class->encrypt = cipher_encrypt;
- camel_cipher_context_class->decrypt = cipher_decrypt;
- camel_cipher_context_class->import_keys = cipher_import_keys;
- camel_cipher_context_class->export_keys = cipher_export_keys;
-}
-
-CamelType
-camel_cipher_context_get_type (void)
-{
- static CamelType type = CAMEL_INVALID_TYPE;
-
- if (type == CAMEL_INVALID_TYPE) {
- type = camel_type_register (camel_object_get_type (),
- "CamelCipherContext",
- sizeof (CamelCipherContext),
- sizeof (CamelCipherContextClass),
- (CamelObjectClassInitFunc) camel_cipher_context_class_init,
- NULL,
- (CamelObjectInitFunc) camel_cipher_context_init,
- (CamelObjectFinalizeFunc) camel_cipher_context_finalise);
- }
-
- return type;
-}
-
-/* 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
-cc_prepare_sign(CamelMimePart *part)
-{
- CamelDataWrapper *dw;
- CamelTransferEncoding encoding;
- int parts, i;
-
- dw = camel_medium_get_content_object((CamelMedium *)part);
- if (!dw)
- return;
-
- if (CAMEL_IS_MULTIPART (dw)) {
- parts = camel_multipart_get_number((CamelMultipart *)dw);
- for (i = 0; i < parts; i++)
- cc_prepare_sign(camel_multipart_get_part((CamelMultipart *)dw, i));
- } else if (CAMEL_IS_MIME_MESSAGE (dw)) {
- cc_prepare_sign((CamelMimePart *)dw);
- } else {
- encoding = camel_mime_part_get_encoding(part);
-
- if (encoding != CAMEL_TRANSFER_ENCODING_BASE64
- && encoding != CAMEL_TRANSFER_ENCODING_QUOTEDPRINTABLE) {
- camel_mime_part_set_encoding(part, CAMEL_TRANSFER_ENCODING_QUOTEDPRINTABLE);
- }
- }
-}
-
-/**
- * camel_cipher_canonical_to_stream:
- * @part: Part to write.
- * @flags: flags for the canonicalisation filter (CamelMimeFilterCanon)
- * @ostream: stream to write canonicalised output to.
- *
- * Writes a part to a stream in a canonicalised format, suitable for signing/encrypting.
- *
- * The transfer encoding paramaters for the part may be changed by this function.
- *
- * Return value: -1 on error;
- **/
-int
-camel_cipher_canonical_to_stream(CamelMimePart *part, guint32 flags, CamelStream *ostream)
-{
- CamelStreamFilter *filter;
- CamelMimeFilter *canon;
- int res = -1;
-
- if (flags & (CAMEL_MIME_FILTER_CANON_FROM|CAMEL_MIME_FILTER_CANON_STRIP))
- cc_prepare_sign(part);
-
- filter = camel_stream_filter_new_with_stream(ostream);
- canon = camel_mime_filter_canon_new(flags);
- camel_stream_filter_add(filter, canon);
- camel_object_unref(canon);
-
- if (camel_data_wrapper_write_to_stream((CamelDataWrapper *)part, (CamelStream *)filter) != -1
- && camel_stream_flush((CamelStream *)filter) != -1)
- res = 0;
-
- camel_object_unref(filter);
- camel_stream_reset(ostream);
-
- return res;
-}
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