static gboolean
empe_mp_alternative_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelMultipart *mp;
gint i, nparts, bestid = 0;
CamelMimePart *best = NULL;
EMailExtensionRegistry *reg;
reg = e_mail_parser_get_extension_registry (parser);
mp = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);
if (!CAMEL_IS_MULTIPART (mp))
return e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable, out_mail_parts);
/* as per rfc, find the last part we know how to display */
nparts = camel_multipart_get_number (mp);
for (i = 0; i < nparts; i++) {
CamelMimePart *mpart;
CamelDataWrapper *data_wrapper;
CamelContentType *type;
gchar *mime_type;
gsize content_size;
if (g_cancellable_is_cancelled (cancellable))
return TRUE;
/* is it correct to use the passed in *part here? */
mpart = camel_multipart_get_part (mp, i);
if (mpart == NULL)
continue;
/* This may block even though the stream does not.
* XXX Pretty inefficient way to test if the MIME part
* is empty. Surely there's a quicker way? */
data_wrapper = camel_medium_get_content (CAMEL_MEDIUM (mpart));
content_size = camel_data_wrapper_calculate_decoded_size_sync (data_wrapper, cancellable, NULL);
if (content_size == 0)
continue;
type = camel_mime_part_get_content_type (mpart);
mime_type = camel_content_type_simple (type);
camel_strdown (mime_type);
if (!e_mail_part_is_attachment (mpart) &&
((camel_content_type_is (type, "multipart", "related") == 0) ||
!related_display_part_is_attachment (mpart)) &&
(e_mail_extension_registry_get_for_mime_type (reg, mime_type) ||
((best == NULL) &&
(e_mail_extension_registry_get_fallback (reg, mime_type)))))
{
best = mpart;
bestid = i;
}
g_free (mime_type);
}
if (best) {
gint len = part_id->len;
g_string_append_printf (part_id, ".alternative.%d", bestid);
e_mail_parser_parse_part (
parser, best, part_id,
cancellable, out_mail_parts);
g_string_truncate (part_id, len);
} else {
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
}
return TRUE;
}
static gboolean
empe_mp_encrypted_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelCipherContext *context;
const gchar *protocol;
CamelMimePart *opart;
CamelCipherValidity *valid;
CamelMultipartEncrypted *mpe;
GQueue work_queue = G_QUEUE_INIT;
GList *head, *link;
GError *local_error = NULL;
gint len;
mpe = (CamelMultipartEncrypted *) camel_medium_get_content ((CamelMedium *) part);
if (!CAMEL_IS_MULTIPART_ENCRYPTED (mpe)) {
e_mail_parser_error (
parser, out_mail_parts,
_("Could not parse MIME message. "
"Displaying as source."));
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution/source",
cancellable, out_mail_parts);
return TRUE;
}
/* Currently we only handle RFC2015-style PGP encryption. */
protocol = camel_content_type_param (
((CamelDataWrapper *) mpe)->mime_type, "protocol");
if (!protocol || g_ascii_strcasecmp (protocol, "application/pgp-encrypted") != 0) {
e_mail_parser_error (
parser, out_mail_parts,
_("Unsupported encryption type for multipart/encrypted"));
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
return TRUE;
}
context = camel_gpg_context_new (e_mail_parser_get_session (parser));
opart = camel_mime_part_new ();
valid = camel_cipher_context_decrypt_sync (
context, part, opart, cancellable, &local_error);
e_mail_part_preserve_charset_in_content_type (part, opart);
if (local_error != NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Could not parse PGP/MIME message: %s"),
local_error->message);
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
g_object_unref (opart);
g_object_unref (context);
g_error_free (local_error);
return TRUE;
}
len = part_id->len;
g_string_append (part_id, ".encrypted");
g_warn_if_fail (e_mail_parser_parse_part (
parser, opart, part_id, cancellable, &work_queue));
g_string_truncate (part_id, len);
head = g_queue_peek_head_link (&work_queue);
/* Update validity of all encrypted sub-parts */
for (link = head; link != NULL; link = g_list_next (link)) {
EMailPart *mail_part = link->data;
e_mail_part_update_validity (
mail_part, valid,
E_MAIL_PART_VALIDITY_ENCRYPTED |
E_MAIL_PART_VALIDITY_PGP);
}
e_queue_transfer (&work_queue, out_mail_parts);
/* Add a widget with details about the encryption, but only when
* the decrypted part isn't itself secured, in that case it has
* created the button itself. */
if (!e_mail_part_is_secured (opart)) {
EMailPart *mail_part;
g_string_append (part_id, ".encrypted.button");
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.widget.secure-button",
cancellable, &work_queue);
mail_part = g_queue_peek_head (&work_queue);
if (mail_part != NULL)
e_mail_part_update_validity (
mail_part, valid,
E_MAIL_PART_VALIDITY_ENCRYPTED |
E_MAIL_PART_VALIDITY_PGP);
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
}
camel_cipher_validity_free (valid);
/* TODO: Make sure when we finalize this part, it is zero'd out */
g_object_unref (opart);
g_object_unref (context);
return TRUE;
}
static gboolean
empe_mp_signed_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelMimePart *cpart = NULL;
CamelMultipart *multipart;
CamelCipherContext *cipher = NULL;
CamelContentType *content_type;
CamelSession *session;
guint32 validity_type;
CamelCipherValidity *valid;
const gchar *protocol = NULL;
GError *local_error = NULL;
gint i, nparts, len;
gboolean secured;
/* If the part is application/pgp-signature sub-part then skip it. */
if (!CAMEL_IS_MULTIPART (part)) {
content_type = camel_mime_part_get_content_type (part);
if (camel_content_type_is (
content_type, "application", "pgp-signature")) {
return TRUE;
}
}
multipart = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);
if (CAMEL_IS_MULTIPART_SIGNED (multipart)) {
cpart = camel_multipart_get_part (
multipart, CAMEL_MULTIPART_SIGNED_CONTENT);
}
if (cpart == NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Could not parse MIME message. "
"Displaying as source."));
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable, out_mail_parts);
return TRUE;
}
content_type = camel_data_wrapper_get_mime_type_field (
CAMEL_DATA_WRAPPER (multipart));
if (content_type != NULL)
protocol = camel_content_type_param (content_type, "protocol");
session = e_mail_parser_get_session (parser);
/* FIXME: Should be done via a plugin interface */
/* FIXME: duplicated in em-format-html-display.c */
if (protocol != NULL) {
#ifdef ENABLE_SMIME
if (g_ascii_strcasecmp ("application/x-pkcs7-signature", protocol) == 0
|| g_ascii_strcasecmp ("application/pkcs7-signature", protocol) == 0) {
cipher = camel_smime_context_new (session);
validity_type = E_MAIL_PART_VALIDITY_SMIME;
} else {
#endif
if (g_ascii_strcasecmp ("application/pgp-signature", protocol) == 0) {
cipher = camel_gpg_context_new (session);
validity_type = E_MAIL_PART_VALIDITY_PGP;
}
#ifdef ENABLE_SMIME
}
#endif
}
if (cipher == NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Unsupported signature format"));
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
return TRUE;
}
valid = camel_cipher_context_verify_sync (
cipher, part, cancellable, &local_error);
if (local_error != NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Error verifying signature: %s"),
local_error->message);
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
g_object_unref (cipher);
g_error_free (local_error);
return TRUE;
}
nparts = camel_multipart_get_number (multipart);
secured = FALSE;
len = part_id->len;
for (i = 0; i < nparts; i++) {
GQueue work_queue = G_QUEUE_INIT;
GList *head, *link;
CamelMimePart *subpart;
subpart = camel_multipart_get_part (multipart, i);
g_string_append_printf (part_id, ".signed.%d", i);
g_warn_if_fail (e_mail_parser_parse_part (
parser, subpart, part_id, cancellable, &work_queue));
g_string_truncate (part_id, len);
if (!secured)
secured = e_mail_part_is_secured (subpart);
head = g_queue_peek_head_link (&work_queue);
for (link = head; link != NULL; link = g_list_next (link)) {
EMailPart *mail_part = link->data;
e_mail_part_update_validity (
mail_part, valid,
validity_type | E_MAIL_PART_VALIDITY_SIGNED);
}
e_queue_transfer (&work_queue, out_mail_parts);
}
/* Add a widget with details about the encryption, but only when
* the encrypted isn't itself secured, in that case it has created
* the button itself. */
if (!secured) {
GQueue work_queue = G_QUEUE_INIT;
EMailPart *mail_part;
g_string_append (part_id, ".signed.button");
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.widget.secure-button",
cancellable, &work_queue);
mail_part = g_queue_peek_head (&work_queue);
if (mail_part != NULL)
e_mail_part_update_validity (
mail_part, valid,
validity_type | E_MAIL_PART_VALIDITY_SIGNED);
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
}
camel_cipher_validity_free (valid);
g_object_unref (cipher);
return TRUE;
}
static gboolean
empe_inlinepgp_signed_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelStream *filtered_stream;
CamelMimeFilterPgp *pgp_filter;
CamelContentType *content_type;
CamelCipherContext *cipher;
CamelCipherValidity *valid;
CamelDataWrapper *dw;
CamelMimePart *opart;
CamelStream *ostream;
GQueue work_queue = G_QUEUE_INIT;
GList *head, *link;
gchar *type;
gint len;
GError *local_error = NULL;
GByteArray *ba;
if (g_cancellable_is_cancelled (cancellable) ||
/* avoid recursion */
(part_id->str && part_id->len > 17 && g_str_has_suffix (part_id->str, ".inlinepgp_signed")))
return FALSE;
cipher = camel_gpg_context_new (e_mail_parser_get_session (parser));
/* Verify the signature of the message */
valid = camel_cipher_context_verify_sync (
cipher, part, cancellable, &local_error);
if (local_error != NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Error verifying signature: %s"),
local_error->message);
g_error_free (local_error);
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable, out_mail_parts);
g_object_unref (cipher);
return TRUE;
}
/* Setup output stream */
ostream = camel_stream_mem_new ();
filtered_stream = camel_stream_filter_new (ostream);
/* Add PGP header / footer filter */
pgp_filter = (CamelMimeFilterPgp *) camel_mime_filter_pgp_new ();
camel_stream_filter_add (
CAMEL_STREAM_FILTER (filtered_stream),
CAMEL_MIME_FILTER (pgp_filter));
g_object_unref (pgp_filter);
/* Pass through the filters that have been setup */
dw = camel_medium_get_content ((CamelMedium *) part);
camel_data_wrapper_decode_to_stream_sync (
dw, (CamelStream *) filtered_stream, cancellable, NULL);
camel_stream_flush ((CamelStream *) filtered_stream, cancellable, NULL);
g_object_unref (filtered_stream);
/* Create a new text/plain MIME part containing the signed
* content preserving the original part's Content-Type params. */
content_type = camel_mime_part_get_content_type (part);
type = camel_content_type_format (content_type);
content_type = camel_content_type_decode (type);
g_free (type);
g_free (content_type->type);
content_type->type = g_strdup ("text");
g_free (content_type->subtype);
content_type->subtype = g_strdup ("plain");
type = camel_content_type_format (content_type);
camel_content_type_unref (content_type);
ba = camel_stream_mem_get_byte_array ((CamelStreamMem *) ostream);
opart = camel_mime_part_new ();
camel_mime_part_set_content (opart, (gchar *) ba->data, ba->len, type);
g_free (type);
len = part_id->len;
g_string_append (part_id, ".inlinepgp_signed");
e_mail_parser_parse_part (
parser, opart, part_id, cancellable, &work_queue);
head = g_queue_peek_head_link (&work_queue);
for (link = head; link != NULL; link = g_list_next (link)) {
EMailPart *mail_part = link->data;
e_mail_part_update_validity (
mail_part, valid,
E_MAIL_PART_VALIDITY_SIGNED |
E_MAIL_PART_VALIDITY_PGP);
}
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
/* Add a widget with details about the encryption, but only when
* the encrypted isn't itself secured, in that case it has created
* the button itself */
if (!e_mail_part_is_secured (opart)) {
EMailPart *mail_part;
g_string_append (part_id, ".inlinepgp_signed.button");
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.widget.secure-button",
cancellable, &work_queue);
mail_part = g_queue_peek_head (&work_queue);
if (mail_part != NULL)
e_mail_part_update_validity (
mail_part, valid,
E_MAIL_PART_VALIDITY_SIGNED |
E_MAIL_PART_VALIDITY_PGP);
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
}
/* Clean Up */
camel_cipher_validity_free (valid);
g_object_unref (opart);
g_object_unref (ostream);
g_object_unref (cipher);
return TRUE;
}