Diffstat (limited to 'libetpan/src/engine/mailprivacy.c') (more/less context) (show whitespace changes)
| -rw-r--r-- | libetpan/src/engine/mailprivacy.c | 949 |
1 files changed, 949 insertions, 0 deletions
diff --git a/libetpan/src/engine/mailprivacy.c b/libetpan/src/engine/mailprivacy.c new file mode 100644 index 0000000..99cc50f --- a/dev/null +++ b/libetpan/src/engine/mailprivacy.c @@ -0,0 +1,949 @@ +/* + * libEtPan! -- a mail library + * + * Copyright (C) 2001, 2005 - DINH Viet Hoa + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the libEtPan! project nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * $Id$ + */ + +#include "mailprivacy.h" + +#include <libetpan/libetpan.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/mman.h> +#include <stdlib.h> +#include <string.h> +#include "mailprivacy_tools.h" + +carray * mailprivacy_get_protocols(struct mailprivacy * privacy) +{ + return privacy->protocols; +} + +static int recursive_check_privacy(struct mailprivacy * privacy, + mailmessage * msg, + struct mailmime * mime); + +static int check_tmp_dir(char * tmp_dir) +{ + struct stat stat_info; + int r; + + r = stat(tmp_dir, &stat_info); + if (r < 0) + return MAIL_ERROR_FILE; + + /* check if the directory belongs to the user */ + if (stat_info.st_uid != getuid()) + return MAIL_ERROR_INVAL; + + if ((stat_info.st_mode & 00777) != 0700) { + r = chmod(tmp_dir, 0700); + if (r < 0) + return MAIL_ERROR_FILE; + } + + return MAIL_NO_ERROR; +} + +struct mailprivacy * mailprivacy_new(char * tmp_dir, int make_alternative) +{ + struct mailprivacy * privacy; + int r; + +#if 0 + r = check_tmp_dir(tmp_dir); + if (r != MAIL_NO_ERROR) + goto err; +#endif + + privacy = malloc(sizeof(* privacy)); + if (privacy == NULL) + goto err; + + privacy->tmp_dir = strdup(tmp_dir); + if (privacy->tmp_dir == NULL) + goto free; + + privacy->msg_ref = chash_new(CHASH_DEFAULTSIZE, CHASH_COPYKEY); + if (privacy->msg_ref == NULL) + goto free_tmp_dir; + + privacy->mmapstr = chash_new(CHASH_DEFAULTSIZE, CHASH_COPYKEY); + if (privacy->mmapstr == NULL) + goto free_msg_ref; + + privacy->mime_ref = chash_new(CHASH_DEFAULTSIZE, CHASH_COPYKEY); + if (privacy->mime_ref == NULL) + goto free_mmapstr; + + privacy->protocols = carray_new(16); + if (privacy->protocols == NULL) + goto free_mime_ref; + + privacy->make_alternative = make_alternative; + + return privacy; + + free_mime_ref: + chash_free(privacy->mime_ref); + free_mmapstr: + chash_free(privacy->mmapstr); + free_msg_ref: + chash_free(privacy->msg_ref); + free_tmp_dir: + free(privacy->tmp_dir); + free: + free(privacy); + err: + return NULL; +} + +void mailprivacy_free(struct mailprivacy * privacy) +{ + carray_free(privacy->protocols); + chash_free(privacy->mime_ref); + chash_free(privacy->mmapstr); + chash_free(privacy->msg_ref); + free(privacy->tmp_dir); + free(privacy); +} + +static int msg_is_modified(struct mailprivacy * privacy, + mailmessage * msg) +{ + chashdatum key; + chashdatum data; + int r; + + if (privacy == NULL) + return 0; + + key.data = &msg; + key.len = sizeof(msg); + + r = chash_get(privacy->msg_ref, &key, &data); + if (r < 0) + return 0; + else + return 1; +} + +static int register_msg(struct mailprivacy * privacy, + mailmessage * msg) +{ + chashdatum key; + chashdatum data; + int r; + + if (privacy == NULL) + return MAIL_NO_ERROR; + + key.data = &msg; + key.len = sizeof(msg); + data.data = msg; + data.len = 0; + + r = chash_set(privacy->msg_ref, &key, &data, NULL); + if (r < 0) + return MAIL_ERROR_MEMORY; + else + return MAIL_NO_ERROR; +} + +static void unregister_message(struct mailprivacy * privacy, + mailmessage * msg) +{ + chashdatum key; + + key.data = &msg; + key.len = sizeof(msg); + + chash_delete(privacy->msg_ref, &key, NULL); +} + +static int result_is_mmapstr(struct mailprivacy * privacy, char * str) +{ + chashdatum key; + chashdatum data; + int r; + + key.data = &str; + key.len = sizeof(str); + + r = chash_get(privacy->mmapstr, &key, &data); + if (r < 0) + return 0; + else + return 1; +} + +static int register_result_mmapstr(struct mailprivacy * privacy, + char * content) +{ + chashdatum key; + chashdatum data; + int r; + + key.data = &content; + key.len = sizeof(content); + data.data = content; + data.len = 0; + + r = chash_set(privacy->mmapstr, &key, &data, NULL); + if (r < 0) + return MAIL_ERROR_MEMORY; + + return 0; +} + +static void unregister_result_mmapstr(struct mailprivacy * privacy, + char * str) +{ + chashdatum key; + + mmap_string_unref(str); + + key.data = &str; + key.len = sizeof(str); + + chash_delete(privacy->mmapstr, &key, NULL); +} + +static int register_mime(struct mailprivacy * privacy, + struct mailmime * mime) +{ + chashdatum key; + chashdatum data; + int r; + + key.data = &mime; + key.len = sizeof(mime); + data.data = mime; + data.len = 0; + + r = chash_set(privacy->mime_ref, &key, &data, NULL); + if (r < 0) + return MAIL_ERROR_MEMORY; + else + return MAIL_NO_ERROR; +} + +static void unregister_mime(struct mailprivacy * privacy, + struct mailmime * mime) +{ + chashdatum key; + + key.data = &mime; + key.len = sizeof(mime); + + chash_delete(privacy->mime_ref, &key, NULL); +} + +static int mime_is_registered(struct mailprivacy * privacy, + struct mailmime * mime) +{ + chashdatum key; + chashdatum data; + int r; + + key.data = &mime; + key.len = sizeof(mime); + + r = chash_get(privacy->mime_ref, &key, &data); + if (r < 0) + return 0; + else + return 1; +} + +static int recursive_register_mime(struct mailprivacy * privacy, + struct mailmime * mime) +{ + clistiter * cur; + int r; + + r = register_mime(privacy, mime); + if (r != MAIL_NO_ERROR) + return r; + + switch (mime->mm_type) { + case MAILMIME_SINGLE: + break; + + case MAILMIME_MULTIPLE: + for(cur = clist_begin(mime->mm_data.mm_multipart.mm_mp_list) ; + cur != NULL ; cur = clist_next(cur)) { + struct mailmime * child; + + child = clist_content(cur); + + r = recursive_register_mime(privacy, child); + if (r != MAIL_NO_ERROR) + return r; + } + break; + + case MAILMIME_MESSAGE: + if (mime->mm_data.mm_message.mm_msg_mime) { + r = recursive_register_mime(privacy, + mime->mm_data.mm_message.mm_msg_mime); + if (r != MAIL_NO_ERROR) + return r; + } + break; + } + + return MAIL_NO_ERROR; +} + +void mailprivacy_recursive_unregister_mime(struct mailprivacy * privacy, + struct mailmime * mime) +{ + clistiter * cur; + + unregister_mime(privacy, mime); + + switch (mime->mm_type) { + case MAILMIME_SINGLE: + break; + + case MAILMIME_MULTIPLE: + for(cur = clist_begin(mime->mm_data.mm_multipart.mm_mp_list) ; + cur != NULL ; cur = clist_next(cur)) { + struct mailmime * child; + + child = clist_content(cur); + + mailprivacy_recursive_unregister_mime(privacy, child); + } + break; + + case MAILMIME_MESSAGE: + if (mime->mm_data.mm_message.mm_msg_mime) + mailprivacy_recursive_unregister_mime(privacy, + mime->mm_data.mm_message.mm_msg_mime); + break; + } +} + +static void recursive_clear_registered_mime(struct mailprivacy * privacy, + struct mailmime * mime) +{ + clistiter * cur; + struct mailmime_data * data; + + switch (mime->mm_type) { + case MAILMIME_SINGLE: + if (mime_is_registered(privacy, mime)) { + data = mime->mm_data.mm_single; + if (data != NULL) { + if (data->dt_type == MAILMIME_DATA_FILE) + unlink(data->dt_data.dt_filename); + } + } + break; + + case MAILMIME_MULTIPLE: + if (mime_is_registered(privacy, mime)) { + data = mime->mm_data.mm_multipart.mm_preamble; + if (data != NULL) { + if (data->dt_type == MAILMIME_DATA_FILE) + unlink(data->dt_data.dt_filename); + } + data = mime->mm_data.mm_multipart.mm_epilogue; + if (data != NULL) { + if (data->dt_type == MAILMIME_DATA_FILE) + unlink(data->dt_data.dt_filename); + } + } + for(cur = clist_begin(mime->mm_data.mm_multipart.mm_mp_list) ; + cur != NULL ; cur = clist_next(cur)) { + struct mailmime * child; + + child = clist_content(cur); + + recursive_clear_registered_mime(privacy, child); + } + break; + + case MAILMIME_MESSAGE: + if (mime->mm_data.mm_message.mm_msg_mime) + recursive_clear_registered_mime(privacy, + mime->mm_data.mm_message.mm_msg_mime); + break; + } + unregister_mime(privacy, mime); +} + + +/* **************************************************** */ +/* fetch operations start here */ + + +static void recursive_clear_registered_mime(struct mailprivacy * privacy, + struct mailmime * mime); + +#if 0 +static void display_recursive_part(struct mailmime * mime) +{ + clistiter * cur; + + fprintf(stderr, "part %p\n", mime->mm_body); + switch (mime->mm_type) { + case MAILMIME_SINGLE: + fprintf(stderr, "single %p - %i\n", mime->mm_data.mm_single, + mime->mm_data.mm_single->dt_type); + if (mime->mm_data.mm_single->dt_type == MAILMIME_DATA_TEXT) { + fprintf(stderr, "data : %p %i\n", + mime->mm_data.mm_single->dt_data.dt_text.dt_data, + mime->mm_data.mm_single->dt_data.dt_text.dt_length); + } + break; + case MAILMIME_MESSAGE: + fprintf(stderr, "message %p\n", mime->mm_data.mm_message.mm_msg_mime); + display_recursive_part(mime->mm_data.mm_message.mm_msg_mime); + break; + case MAILMIME_MULTIPLE: + for(cur = clist_begin(mime->mm_data.mm_multipart.mm_mp_list) ; cur != NULL ; + cur = clist_next(cur)) { + + fprintf(stderr, "multipart\n"); + display_recursive_part(clist_content(cur)); + } + break; + } +} +#endif + +int mailprivacy_msg_get_bodystructure(struct mailprivacy * privacy, + mailmessage * msg_info, + struct mailmime ** result) +{ + int r; + struct mailmime * mime; + + if (msg_info->msg_mime != NULL) + return MAIL_NO_ERROR; + + if (msg_is_modified(privacy, msg_info)) + return MAIL_NO_ERROR; + + r = mailmessage_get_bodystructure(msg_info, &mime); + if (r != MAIL_NO_ERROR) + return r; + + /* modification on message if necessary */ + r = recursive_check_privacy(privacy, msg_info, msg_info->msg_mime); + if (r != MAIL_NO_ERROR) { + * result = msg_info->msg_mime; + return MAIL_NO_ERROR; + } + + r = register_msg(privacy, msg_info); + if (r != MAIL_NO_ERROR) { + recursive_clear_registered_mime(privacy, mime); + mailmessage_flush(msg_info); + return MAIL_ERROR_MEMORY; + } + + * result = msg_info->msg_mime; + + return MAIL_NO_ERROR; +} + +void mailprivacy_msg_flush(struct mailprivacy * privacy, + mailmessage * msg_info) +{ + if (msg_is_modified(privacy, msg_info)) { + /* remove all modified parts */ + if (msg_info->msg_mime != NULL) + recursive_clear_registered_mime(privacy, msg_info->msg_mime); + unregister_message(privacy, msg_info); + } + + mailmessage_flush(msg_info); +} + +static int fetch_registered_part(struct mailprivacy * privacy, + int (* fetch_section)(mailmessage *, struct mailmime *, + char **, size_t *), + struct mailmime * mime, + char ** result, size_t * result_len) +{ + mailmessage * dummy_msg; + int res; + char * content; + size_t content_len; + int r; + + dummy_msg = mime_message_init(NULL); + if (dummy_msg == NULL) { + res = MAIL_ERROR_MEMORY; + goto err; + } + + r = mime_message_set_tmpdir(dummy_msg, privacy->tmp_dir); + if (r != MAIL_NO_ERROR) { + res = MAIL_ERROR_MEMORY; + goto free_msg; + } + + r = fetch_section(dummy_msg, mime, &content, &content_len); + if (r != MAIL_NO_ERROR) { + res = r; + goto free_msg; + } + + r = register_result_mmapstr(privacy, content); + if (r != MAIL_NO_ERROR) { + res = r; + goto free_fetch; + } + + mailmessage_free(dummy_msg); + + * result = content; + * result_len = content_len; + + return MAIL_NO_ERROR; + + free_fetch: + mailmessage_fetch_result_free(dummy_msg, content); + free_msg: + mailmessage_free(dummy_msg); + err: + return res; +} + +int mailprivacy_msg_fetch_section(struct mailprivacy * privacy, + mailmessage * msg_info, + struct mailmime * mime, + char ** result, size_t * result_len) +{ + if (msg_is_modified(privacy, msg_info) && + mime_is_registered(privacy, mime)) { + return fetch_registered_part(privacy, mailmessage_fetch_section, + mime, result, result_len); + } + + return mailmessage_fetch_section(msg_info, mime, result, result_len); +} + +int mailprivacy_msg_fetch_section_header(struct mailprivacy * privacy, + mailmessage * msg_info, + struct mailmime * mime, + char ** result, + size_t * result_len) +{ + if (msg_is_modified(privacy, msg_info) && + mime_is_registered(privacy, mime)) { + return fetch_registered_part(privacy, mailmessage_fetch_section_header, + mime, result, result_len); + } + + return mailmessage_fetch_section_header(msg_info, mime, result, result_len); +} + +int mailprivacy_msg_fetch_section_mime(struct mailprivacy * privacy, + mailmessage * msg_info, + struct mailmime * mime, + char ** result, + size_t * result_len) +{ + if (msg_is_modified(privacy, msg_info) && + mime_is_registered(privacy, mime)) { + return fetch_registered_part(privacy, mailmessage_fetch_section_mime, + mime, result, result_len); + } + + return mailmessage_fetch_section_mime(msg_info, mime, result, result_len); +} + +int mailprivacy_msg_fetch_section_body(struct mailprivacy * privacy, + mailmessage * msg_info, + struct mailmime * mime, + char ** result, + size_t * result_len) +{ + if (msg_is_modified(privacy, msg_info) && + mime_is_registered(privacy, mime)) { + return fetch_registered_part(privacy, mailmessage_fetch_section_body, + mime, result, result_len); + } + + return mailmessage_fetch_section_body(msg_info, mime, result, result_len); +} + +void mailprivacy_msg_fetch_result_free(struct mailprivacy * privacy, + mailmessage * msg_info, + char * msg) +{ + if (msg == NULL) + return; + + if (msg_is_modified(privacy, msg_info)) { + if (result_is_mmapstr(privacy, msg)) { + unregister_result_mmapstr(privacy, msg); + return; + } + } + + mailmessage_fetch_result_free(msg_info, msg); +} + +int mailprivacy_msg_fetch(struct mailprivacy * privacy, + mailmessage * msg_info, + char ** result, + size_t * result_len) +{ + return mailmessage_fetch(msg_info, result, result_len); +} + +int mailprivacy_msg_fetch_header(struct mailprivacy * privacy, + mailmessage * msg_info, + char ** result, + size_t * result_len) +{ + return mailmessage_fetch_header(msg_info, result, result_len); +} + +/* end of fetch operations */ +/* **************************************************** */ + +static int privacy_handler(struct mailprivacy * privacy, + mailmessage * msg, + struct mailmime * mime, struct mailmime ** result); + + + +static struct mailmime * +mime_add_alternative(struct mailprivacy * privacy, + mailmessage * msg, + struct mailmime * mime, + struct mailmime * alternative) +{ + struct mailmime * multipart; + int r; + struct mailmime * mime_copy; + char original_filename[PATH_MAX]; + + if (mime->mm_parent == NULL) + goto err; + + r = mailmime_new_with_content("multipart/alternative", NULL, &multipart); + if (r != MAILIMF_NO_ERROR) + goto err; + + r = mailmime_smart_add_part(multipart, alternative); + if (r != MAILIMF_NO_ERROR) { + goto free_multipart; + } + + /* get copy of mime part "mime" and set parts */ + + r = mailprivacy_fetch_mime_body_to_file(privacy, + original_filename, sizeof(original_filename), + msg, mime); + if (r != MAIL_NO_ERROR) + goto detach_alternative; + + r = mailprivacy_get_part_from_file(privacy, 0, + original_filename, &mime_copy); + unlink(original_filename); + if (r != MAIL_NO_ERROR) { + goto detach_alternative; + } + + r = mailmime_smart_add_part(multipart, mime_copy); + if (r != MAILIMF_NO_ERROR) { + goto free_mime_copy; + } + + r = recursive_register_mime(privacy, multipart); + if (r != MAIL_NO_ERROR) + goto detach_mime_copy; + + mailmime_substitute(mime, multipart); + + mailmime_free(mime); + + return multipart; + + detach_mime_copy: + mailprivacy_recursive_unregister_mime(privacy, multipart); + mailmime_remove_part(alternative); + free_mime_copy: + mailprivacy_mime_clear(mime_copy); + mailmime_free(mime_copy); + detach_alternative: + mailmime_remove_part(alternative); + free_multipart: + mailmime_free(multipart); + err: + return NULL; +} + +/* + recursive_check_privacy returns MAIL_NO_ERROR if at least one + part is using a privacy protocol. +*/ + +static int recursive_check_privacy(struct mailprivacy * privacy, + mailmessage * msg, + struct mailmime * mime) +{ + int r; + clistiter * cur; + struct mailmime * alternative; + int res; + struct mailmime * multipart; + + if (privacy == NULL) + return MAIL_NO_ERROR; + + if (mime_is_registered(privacy, mime)) + return MAIL_ERROR_INVAL; + + r = privacy_handler(privacy, msg, mime, &alternative); + if (r == MAIL_NO_ERROR) { + if (privacy->make_alternative) { + multipart = mime_add_alternative(privacy, msg, mime, alternative); + if (multipart == NULL) { + mailprivacy_mime_clear(alternative); + mailmime_free(alternative); + return MAIL_ERROR_MEMORY; + } + } + else { + mailmime_substitute(mime, alternative); + mailmime_free(mime); + mime = NULL; + } + + return MAIL_NO_ERROR; + } + else { + switch (mime->mm_type) { + case MAILMIME_SINGLE: + return MAIL_ERROR_INVAL; + + case MAILMIME_MULTIPLE: + res = MAIL_ERROR_INVAL; + + for(cur = clist_begin(mime->mm_data.mm_multipart.mm_mp_list) ; + cur != NULL ; cur = clist_next(cur)) { + struct mailmime * child; + + child = clist_content(cur); + + r = recursive_check_privacy(privacy, msg, child); + if (r == MAIL_NO_ERROR) + res = MAIL_NO_ERROR; + } + + return res; + + case MAILMIME_MESSAGE: + if (mime->mm_data.mm_message.mm_msg_mime != NULL) + return recursive_check_privacy(privacy, msg, + mime->mm_data.mm_message.mm_msg_mime); + return MAIL_ERROR_INVAL; + + default: + return MAIL_ERROR_INVAL; + } + } +} + +static int privacy_handler(struct mailprivacy * privacy, + mailmessage * msg, + struct mailmime * mime, struct mailmime ** result) +{ + int r; + struct mailmime * alternative_mime; + unsigned int i; + + alternative_mime = NULL; + for(i = 0 ; i < carray_count(privacy->protocols) ; i ++) { + struct mailprivacy_protocol * protocol; + + protocol = carray_get(privacy->protocols, i); + + if (protocol->decrypt != NULL) { + r = protocol->decrypt(privacy, msg, mime, &alternative_mime); + if (r == MAIL_NO_ERROR) { + + * result = alternative_mime; + + return MAIL_NO_ERROR; + } + } + } + + return MAIL_ERROR_INVAL; +} + +int mailprivacy_register(struct mailprivacy * privacy, + struct mailprivacy_protocol * protocol) +{ + int r; + + r = carray_add(privacy->protocols, protocol, NULL); + if (r < 0) + return MAIL_ERROR_MEMORY; + + return MAIL_NO_ERROR; +} + +void mailprivacy_unregister(struct mailprivacy * privacy, + struct mailprivacy_protocol * protocol) +{ + unsigned int i; + + for(i = 0 ; i < carray_count(privacy->protocols) ; i ++) { + if (carray_get(privacy->protocols, i) == protocol) { + carray_delete(privacy->protocols, i); + return; + } + } +} + +static struct mailprivacy_protocol * +get_protocol(struct mailprivacy * privacy, char * privacy_driver) +{ + unsigned int i; + + for(i = 0 ; i < carray_count(privacy->protocols) ; i ++) { + struct mailprivacy_protocol * protocol; + + protocol = carray_get(privacy->protocols, i); + if (strcasecmp(protocol->name, privacy_driver) == 0) + return protocol; + } + + return NULL; +} + +static struct mailprivacy_encryption * +get_encryption(struct mailprivacy_protocol * protocol, + char * privacy_encryption) +{ + int i; + + for(i = 0 ; i < protocol->encryption_count ; i ++) { + struct mailprivacy_encryption * encryption; + + encryption = &protocol->encryption_tab[i]; + if (strcasecmp(encryption->name, privacy_encryption) == 0) + return encryption; + } + + return NULL; +} + +int mailprivacy_encrypt(struct mailprivacy * privacy, + char * privacy_driver, char * privacy_encryption, + struct mailmime * mime, + struct mailmime ** result) +{ + struct mailprivacy_protocol * protocol; + struct mailprivacy_encryption * encryption; + int r; + + protocol = get_protocol(privacy, privacy_driver); + if (protocol == NULL) + return MAIL_ERROR_INVAL; + + encryption = get_encryption(protocol, privacy_encryption); + if (encryption == NULL) + return MAIL_ERROR_INVAL; + + if (encryption->encrypt == NULL) + return MAIL_ERROR_NOT_IMPLEMENTED; + + r = encryption->encrypt(privacy, mime, result); + if (r != MAIL_NO_ERROR) + return r; + + return MAIL_NO_ERROR; +} + +char * mailprivacy_get_encryption_name(struct mailprivacy * privacy, + char * privacy_driver, char * privacy_encryption) +{ + struct mailprivacy_protocol * protocol; + struct mailprivacy_encryption * encryption; + + protocol = get_protocol(privacy, privacy_driver); + if (protocol == NULL) + return NULL; + + encryption = get_encryption(protocol, privacy_encryption); + if (encryption == NULL) + return NULL; + + return encryption->description; +} + +int mailprivacy_is_encrypted(struct mailprivacy * privacy, + mailmessage * msg, + struct mailmime * mime) +{ + unsigned int i; + + if (mime_is_registered(privacy, mime)) + return 0; + + for(i = 0 ; i < carray_count(privacy->protocols) ; i ++) { + struct mailprivacy_protocol * protocol; + + protocol = carray_get(privacy->protocols, i); + + if (protocol->is_encrypted != NULL) { + if (protocol->is_encrypted(privacy, msg, mime)) + return 1; + } + } + + return 0; +} + +void mailprivacy_debug(struct mailprivacy * privacy, FILE * f) +{ + fprintf(f, "privacy debug -- begin\n"); + fprintf(f, "registered message: %i\n", chash_count(privacy->msg_ref)); + fprintf(f, "registered MMAPStr: %i\n", chash_count(privacy->mmapstr)); + fprintf(f, "registered mailmime: %i\n", chash_count(privacy->mime_ref)); + fprintf(f, "privacy debug -- end\n"); +} |