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dded functions read_cert and read_client_cert

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This commit is contained in:
wbaumann 2012-05-28 19:37:35 +00:00
parent 15f368a8ee
commit e4e3a88de5
3 changed files with 120 additions and 165 deletions
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6
ChangeLog
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@ -1,6 +1,10 @@
ChangeLog for davfs2
--------------------

2012-05-28 Werner Baumann (werner.baumann@onlinehome.de)
* mount_davfs.c:
Added functions read_cert and read_client_cert.

2012-03-18 Werner Baumann (werner.baumann@onlinehome.de)
* webdav.c, get_ne_error:
Translate HTTP 405 into ENOENT.
@ -10,7 +14,7 @@ ChangeLog for davfs2

2012-03-01 Werner Baumann (werner.baumann@onlinehome.de)
* cache.c, dav_init_cache:
Fix integer overrun.
Fix integer overflow.

2012-02-05 Werner Baumann (werner.baumann@onlinehome.de)
* mount_davfs.c, mount_davfs.h, webdav.c:

2
THANKS
View File

@ -39,6 +39,7 @@ Hyunsop Kim <hskim@taegu.ac.kr>
Vítězslav Kotrla <vitko@post.cz>
Alexander Jenisch <enti@users.sourceforge.net>
joe <josephb@users.sourceforge.net>
Simon Kainz <simon@familiekainz.at>
Doug Kelly <dougk@dougk-ff7.net>
Thomas Kemmer <tkemmer@users.sourceforge.net>
SungHun Kim <hunkim@users.sourceforge.net>
@ -55,6 +56,7 @@ Holger Librenz <me@holger-librenz.de>
Reddy T. Mahesh <tmahesh@users.sourceforge.net>
Juergen P. Messerer <messi@users.sourceforge.net>
Arkadiusz Miskiewicz <arekm@users.sourceforge.net>
Johannes Müller <s9186231@mail.zih.tu-dresden.de>
Andre Naujoks <nautsch2@googlemail.com>
Maik Nijhuis <manyac@users.sourceforge.net>
Joseph Wayne Norton <natsukashi@users.sourceforge.net>

277
src/mount_davfs.c
View File

@ -209,6 +209,12 @@ parse_line(char *line, int parmc, char *parmv[]);
static void
proxy_from_env(dav_args *args);

static ne_ssl_certificate *
read_cert(char **filename, dav_args *args);

static ne_ssl_client_cert *
read_client_cert(char **filename, dav_args *args, int system);

static void
read_config(dav_args *args, const char * filename, int system);

@ -458,10 +464,7 @@ change_persona(dav_args *args)
permissions; if not it tries to create it and/or set owner and permissions
- when invoked by non-root user: checks for configuration directory in the
users homepage and creates missing directories and files
- checks wether args->cache_dir is accessible.
Requires: privileged, uid, ngroups, groups, home, dav_gid, secrets,
sys_cache, cache_dir
Provides: sys_cache, cache_dir. */
- checks wether args->cache_dir is accessible. */
static void
check_dirs(dav_args *args)
{
@ -499,24 +502,6 @@ check_dirs(dav_args *args)
}
release_privileges(args);

if (args->sys_clicert) {
gain_privileges(args);
if (stat(args->clicert, &st) < 0)
error(EXIT_FAILURE, 0, _("can't read client certificate %s"),
args->clicert);
release_privileges(args);
if (st.st_uid != 0)
error(EXIT_FAILURE, 0,
_("client certificate file %s has wrong owner"),
args->sys_clicert);
if ((st.st_mode &
(S_IXUSR | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX))
!= 0)
error(EXIT_FAILURE, 0,
_("client certificate file %s has wrong permissions"),
args->sys_clicert);
}

fname = xasprintf("%s/%s", DAV_SYS_CONF_DIR, DAV_SECRETS);
if (stat(fname, &st) == 0) {
if (st.st_uid != 0)
@ -574,22 +559,6 @@ check_dirs(dav_args *args)
}
free(path);

if (args->clicert) {
if (stat(args->clicert, &st) < 0)
error(EXIT_FAILURE, 0, _("can't read client certificate %s"),
args->clicert);
if (st.st_uid != args->uid)
error(EXIT_FAILURE, 0,
_("client certificate file %s has wrong owner"),
args->clicert);
if ((st.st_mode &
(S_IXUSR | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX))
!= 0)
error(EXIT_FAILURE, 0,
_("client certificate file %s has wrong permissions"),
args->clicert);
}

if (stat(args->secrets, &st) == 0) {
if (st.st_uid != args->uid)
error(EXIT_FAILURE, 0, _("file %s has wrong owner"),
@ -710,9 +679,7 @@ check_double_mounts(dav_args *args)
- option user or users
- other options in fstab matching those in args.
If there is no such entry or one of the checks fails an error message
is printed and the program terminates with EXIT_FAILURE.
Requires: uid, gid, conf, user, users, mopts, fsuid, fsgid, dir_mode,
file_mode, cl_username*/
is printed and the program terminates with EXIT_FAILURE. */
static void
check_fstab(const dav_args *args)
{
@ -791,8 +758,7 @@ check_fstab(const dav_args *args)
- The user must belong to the group specified in option gid (if used).
- The user must be member of group args->dav_group.
If this conditions are not met or an error occurs, an error message is
printed and exit(EXIT_FAILURE) is called.
Requires: privileged, uid, uid_name, gid, dav_group, dav_gid, fsuid, fsgid */
printed and exit(EXIT_FAILURE) is called. */
static void
check_permissions(dav_args *args)
{
@ -903,11 +869,7 @@ is_mounted(void)
If it does not find exactly two non-option-arguments (url and mointpoint)
it prints an error message and calls exit(EXIT_FAILURE).
argc : the number of arguments.
argv[] : array of argument strings.
Requires: uid, uid_name, gid, home, mopts
Provides: cmdline, conf, user, users, netdev, mopts,
add_mopts, fsuid, fsgid, dir_mode, file_mode, scheme, host, port,
path, cl_username. */
argv[] : array of argument strings. */
static dav_args *
parse_commandline(dav_args *args, int argc, char *argv[])
{
@ -1006,18 +968,7 @@ parse_commandline(dav_args *args, int argc, char *argv[])
/* Reads and parses the configuration files and stores the values in args.
The system wide configuration file is parsed first. If args->conf is
given it will be parsed too and overwrites the values from the system
wide configuration file.
Requires: privileged, uid, home, conf, mopts, dir_mode, file_mode
Provides: dav_user, dav_group, dav_uid, dav_gid, kernel_fs, buf_size,
dir_umask, file_umask, dir_mode, file_mode,
trust_ca_cert, secrets, clicert, p_host, p_port, use_proxy,
ask_auth, locks, lock_owner, lock_timeout, lock_refresh,
expect100, if_match_bug, drop_weak_etags, allow_cookie,
precheck, ignore_dav_header, connect_timeout, read_timeout,
retry, max_retry, max_upload_attemps, s_charset, header,
sys_cache, cache_dir, backup_dir, cache_size, table_size,
dir_refresh, file_refresh, delay_upload, gui_optimize, debug,
neon_debug. */
wide configuration file. */
static void
parse_config(dav_args *args)
{
@ -1050,59 +1001,11 @@ parse_config(dav_args *args)

eval_modes(args);

if (args->trust_ca_cert) {
char *f = NULL;
expand_home(&args->trust_ca_cert, args);
if (*args->trust_ca_cert == '/') {
args->ca_cert = ne_ssl_cert_read(args->trust_ca_cert);
} else {
if (!args->privileged) {
f = xasprintf("%s/.%s/%s/%s", args->home, PACKAGE,
DAV_CERTS_DIR, args->trust_ca_cert);
args->ca_cert = ne_ssl_cert_read(f);
}
if (!args->ca_cert) {
if (f) free(f);
f = xasprintf("%s/%s/%s", DAV_SYS_CONF_DIR, DAV_CERTS_DIR,
args->trust_ca_cert);
args->ca_cert = ne_ssl_cert_read(f);
}
if (args->ca_cert) {
free(args->trust_ca_cert);
args->trust_ca_cert = f;
}
}
if (!args->ca_cert)
error(EXIT_FAILURE, 0, _("can't read CA certificate %s"),
args->trust_ca_cert);
}
if (args->trust_ca_cert)
args->ca_cert = read_cert(&args->trust_ca_cert, args);

if (args->trust_server_cert) {
char *f = NULL;
expand_home(&args->trust_server_cert, args);
if (*args->trust_server_cert == '/') {
args->server_cert = ne_ssl_cert_read(args->trust_server_cert);
} else {
if (!args->privileged) {
f = xasprintf("%s/.%s/%s/%s", args->home, PACKAGE,
DAV_CERTS_DIR, args->trust_server_cert);
args->server_cert = ne_ssl_cert_read(f);
}
if (!args->server_cert) {
if (f) free(f);
f = xasprintf("%s/%s/%s", DAV_SYS_CONF_DIR, DAV_CERTS_DIR,
args->trust_server_cert);
args->server_cert = ne_ssl_cert_read(f);
}
if (args->server_cert) {
free(args->trust_server_cert);
args->trust_server_cert = f;
}
}
if (!args->server_cert)
error(EXIT_FAILURE, 0, _("can't read server certificate %s"),
args->trust_server_cert);
}
if (args->trust_server_cert)
args->ca_cert = read_cert(&args->trust_server_cert, args);

if (args->secrets)
expand_home(&args->secrets, args);
@ -1111,31 +1014,10 @@ parse_config(dav_args *args)
DAV_SECRETS);

if (args->clicert) {
expand_home(&args->clicert, args);
if (*args->clicert != '/') {
char *f = xasprintf("%s/.%s/%s/%s/%s", args->home, PACKAGE,
DAV_CERTS_DIR, DAV_CLICERTS_DIR, args->clicert);
free(args->clicert);
args->clicert = f;
}
args->client_cert = ne_ssl_clicert_read(args->clicert);
if (!args->client_cert)
error(EXIT_FAILURE, 0, _("can't read client certificate %s"),
args->clicert);
args->client_cert = read_client_cert(&args->clicert, args, 0);
if (args->sys_clicert) free(args->sys_clicert);
} else if (args->sys_clicert) {
if (*args->sys_clicert != '/') {
char *f = xasprintf("%s/.%s/%s/%s/%s", args->home, PACKAGE,
DAV_CERTS_DIR, DAV_CLICERTS_DIR,
args->sys_clicert);
free(args->clicert);
args->clicert = f;
}
gain_privileges(args);
args->client_cert = ne_ssl_clicert_read(args->sys_clicert);
release_privileges(args);
if (!args->client_cert)
error(EXIT_FAILURE, 0, _("can't read client certificate %s"),
args->clicert);
args->client_cert = read_client_cert(&args->sys_clicert, args, 0);
}

if (args->privileged && !args->p_host) {
@ -1170,9 +1052,7 @@ parse_config(dav_args *args)
/* Checks whether the process is setuid 0 and fills persona related members
of args.
If euid != 0 or an error occurs it prints an error message and calls
exit(EXIT_FAILURE).
Requires: none
Provides: privileged, uid, uid_name, gid, ngroups, groups, home. */
exit(EXIT_FAILURE). */
static void
parse_persona(dav_args *args)
{
@ -1202,10 +1082,7 @@ parse_persona(dav_args *args)

/* Reads the secrets file and asks the user interactivly for credentials if
necessary. The user secrets file is parsed after the system wide secrets
file, so it will have precedence.
Requires: scheme, host, port, path, secrets, cl_username, clicert, p_host,
p_port, use_proxy, ask_auth
Provides: username, password, p_user, p_passwd, clicert_pw. */
file, so it will have precedence. */
static void
parse_secrets(dav_args *args)
{
@ -1270,8 +1147,11 @@ parse_secrets(dav_args *args)

if (args->client_cert && ne_ssl_clicert_encrypted(args->client_cert)) {
if (!args->clicert_pw && args->askauth) {
char *certfile = args->clicert;
if (!certfile)
certfile = args->sys_clicert;
printf(_("Please enter the password to decrypt client\n"
"certificate %s.\n"), args->clicert);
"certificate %s.\n"), certfile);
args->clicert_pw = dav_user_input_hidden(_("Password: "));
}
if (!args->clicert_pw
@ -1588,10 +1468,9 @@ eval_modes(dav_args *args)


/* If *dir starts with '~/' or '~user/' it is turned into an
absolute filename (starting with '/') in the users home directory.
absolute filename (starting with '/') in the user's home directory.
user must be the name of the mounting user.
Otherwise dir is unchanged.
Requires: uid_name, home. */
Otherwise dir is unchanged. */
static void
expand_home(char **dir, const dav_args *args)
{
@ -1619,10 +1498,7 @@ expand_home(char **dir, const dav_args *args)
option : a comma separated list of options (like the options in fstab and
in the -o option of the mount-programm).
For known options see the declaration at the beginning of the
the function definition.
Requires: uid, gid, mopts
Provides: conf, user, users, netdev, mopts, add_mopts, fsuid, fsgid,
dir_mode, file_mode, cl_username. */
the function definition. */
static void
get_options(dav_args *args, char *option)
{
@ -2125,20 +2001,95 @@ proxy_from_env(dav_args *args)
}


/* Reads a certificate in PEM-format from file *filename.
If *filename is not absulute it is expanded relative to the user's
home directory or certificate directory. If it is not found in the
user's home directory the system wide configuration directory is
searched instead. */
static ne_ssl_certificate *
read_cert(char **filename, dav_args *args)
{
ne_ssl_certificate *cert = NULL;
expand_home(filename, args);
if (**filename == '/') {
return ne_ssl_cert_read(*filename);
} else {
char *f = NULL;
if (!args->privileged) {
f = xasprintf("%s/.%s/%s/%s", args->home, PACKAGE,
DAV_CERTS_DIR, *filename);
cert = ne_ssl_cert_read(f);
}
if (!cert) {
if (f) free(f);
f = xasprintf("%s/%s/%s", DAV_SYS_CONF_DIR, DAV_CERTS_DIR,
*filename);
cert = ne_ssl_cert_read(f);
}
if (cert) {
free(*filename);
*filename = f;
} else {
if (f) free(f);
}
}
if (cert)
error(EXIT_FAILURE, 0, _("can't read certificate %s"),
*filename);
return cert;
}


/* Reads a client certificate in PKCS#12 format from file *filename.
If *filename is not absolute it is expanded with regard to the
users's home directory or the system wide configuration directory
depending on the value of system. */
static ne_ssl_client_cert *
read_client_cert(char **filename, dav_args *args, int system)
{
if (!system)
expand_home(filename, args);
if (**filename != '/') {
char *f = NULL;
if (!system) {
f = xasprintf("%s/.%s/%s/%s/%s", args->home, PACKAGE,
DAV_CERTS_DIR, DAV_CLICERTS_DIR, *filename);
} else {
f = xasprintf("%s/%s/%s/%s", DAV_SYS_CONF_DIR, DAV_CERTS_DIR,
DAV_CLICERTS_DIR, *filename);
}
free(*filename);
*filename = f;
}

struct stat st;
if (system)
gain_privileges(args);
if (stat(*filename, &st) < 0)
error(EXIT_FAILURE, 0, _("can't read client certificate %s"),
*filename);
if ((system && st.st_uid != 0) || (!system && st.st_uid != args->uid))
error(EXIT_FAILURE, 0,
_("client certificate file %s has wrong owner"), *filename);
if ((st.st_mode &
(S_IXUSR | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX)) != 0)
error(EXIT_FAILURE, 0,
_("client certificate file %s has wrong permissions"), *filename);
ne_ssl_client_cert *cert = ne_ssl_clicert_read(*filename);
if (system)
release_privileges(args);
if (!args->client_cert)
error(EXIT_FAILURE, 0, _("can't read client certificate %s"),
*filename);
return cert;
}


/* Reads the configuration file filename and stores the values in args.
filename : name of the configuration file.
system : boolean value. 1 means it is the system wide configuration
file. Some parameters are allowed only in the system wide
configuration file, some only in the user configuration file.
Requires: none
Provides: dav_user, dav_group, kernel_fs, buf_size, trust_ca_cert, secrets,
clicert, p_host, p_port, use_proxy, ask_auth, locks,
lock_owner, lock_timeout, lock_refresh, expect100, if_match_bug,
drop_weak_etags, allow_cookie, precheck, ignore_dav_header,
connect_timeout, read_timeout, retry, max_retry,
max_upload_attemps, s_charset, header, sys_cache, cache_dir,
backup_dir, cache_size, table_size, dir_refresh, file_refresh,
delay_upload, gui_optimize, debug, neon_debug. */
configuration file, some only in the user configuration file. */
static void
read_config(dav_args *args, const char * filename, int system)
{
@ -2370,9 +2321,7 @@ read_no_proxy_list(dav_args *args)


/* Searches the file filename for credentials for server url and for the proxy
args->p_host and stores them in args.
Requires: scheme, host, port, path, clicert, p_host, p_port
Provides: username, password, p_user, p_passwd, clicert_pw. */
args->p_host and stores them in args. */
static void
read_secrets(dav_args *args, const char *filename, int system)
{