]>
code.delx.au - pulseaudio/blob - src/pulsecore/authkey.c
2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as
9 published by the Free Software Foundation; either version 2.1 of the
10 License, or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
37 #include <pulse/util.h>
38 #include <pulse/xmalloc.h>
39 #include <pulsecore/core-error.h>
40 #include <pulsecore/core-util.h>
41 #include <pulsecore/log.h>
42 #include <pulsecore/random.h>
43 #include <pulsecore/macro.h>
47 /* Generate a new authorization key, store it in file fd and return it in *data */
48 static int generate(int fd
, void *ret_data
, size_t length
) {
53 pa_assert(length
> 0);
55 pa_random(ret_data
, length
);
57 lseek(fd
, (off_t
) 0, SEEK_SET
);
58 if (ftruncate(fd
, (off_t
) 0) < 0) {
59 pa_log("Failed to truncate cookie file: %s", pa_cstrerror(errno
));
63 if ((r
= pa_loop_write(fd
, ret_data
, length
, NULL
)) < 0 || (size_t) r
!= length
) {
64 pa_log("Failed to write cookie file: %s", pa_cstrerror(errno
));
75 /* Load an euthorization cookie from file fn and store it in data. If
76 * the cookie file doesn't exist, create it */
77 static int load(const char *fn
, void *data
, size_t length
) {
80 int unlock
= 0, ret
= -1;
85 pa_assert(length
> 0);
87 if ((fd
= pa_open_cloexec(fn
, O_RDWR
|O_CREAT
|O_BINARY
, S_IRUSR
|S_IWUSR
)) < 0) {
89 if (errno
!= EACCES
|| (fd
= open(fn
, O_RDONLY
|O_BINARY
)) < 0) {
90 pa_log_warn("Failed to open cookie file '%s': %s", fn
, pa_cstrerror(errno
));
96 unlock
= pa_lock_fd(fd
, 1) >= 0;
98 if ((r
= pa_loop_read(fd
, data
, length
, NULL
)) < 0) {
99 pa_log("Failed to read cookie file '%s': %s", fn
, pa_cstrerror(errno
));
103 if ((size_t) r
!= length
) {
104 pa_log_debug("Got %d bytes from cookie file '%s', expected %d", (int) r
, fn
, (int) length
);
107 pa_log_warn("Unable to write cookie to read-only file");
111 if (generate(fd
, data
, length
) < 0)
124 if (pa_close(fd
) < 0) {
125 pa_log_warn("Failed to close cookie file: %s", pa_cstrerror(errno
));
133 /* Load a cookie from a cookie file. If the file doesn't exist, create it. */
134 int pa_authkey_load(const char *path
, void *data
, size_t length
) {
139 pa_assert(length
> 0);
141 if ((ret
= load(path
, data
, length
)) < 0)
142 pa_log_warn("Failed to load authorization key '%s': %s", path
, (ret
< 0) ? pa_cstrerror(errno
) : "File corrupt");
147 /* If the specified file path starts with / return it, otherwise
148 * return path prepended with home directory */
149 static char *normalize_path(const char *fn
) {
156 if (strlen(fn
) < 3 || !IsCharAlpha(fn
[0]) || fn
[1] != ':' || fn
[2] != '\\') {
160 if (!(homedir
= pa_get_home_dir_malloc()))
163 s
= pa_sprintf_malloc("%s" PA_PATH_SEP
"%s", homedir
, fn
);
169 return pa_xstrdup(fn
);
172 /* Load a cookie from a file in the home directory. If the specified
173 * path starts with /, use it as absolute path instead. */
174 int pa_authkey_load_auto(const char *fn
, void *data
, size_t length
) {
180 pa_assert(length
> 0);
182 if (!(p
= normalize_path(fn
)))
185 ret
= pa_authkey_load(p
, data
, length
);
191 /* Store the specified cookie in the specified cookie file */
192 int pa_authkey_save(const char *fn
, const void *data
, size_t length
) {
194 int unlock
= 0, ret
= -1;
200 pa_assert(length
> 0);
202 if (!(p
= normalize_path(fn
)))
205 if ((fd
= pa_open_cloexec(p
, O_RDWR
|O_CREAT
, S_IRUSR
|S_IWUSR
)) < 0) {
206 pa_log_warn("Failed to open cookie file '%s': %s", fn
, pa_cstrerror(errno
));
210 unlock
= pa_lock_fd(fd
, 1) >= 0;
212 if ((r
= pa_loop_write(fd
, data
, length
, NULL
)) < 0 || (size_t) r
!= length
) {
213 pa_log("Failed to read cookie file '%s': %s", fn
, pa_cstrerror(errno
));
226 if (pa_close(fd
) < 0) {
227 pa_log_warn("Failed to close cookie file: %s", pa_cstrerror(errno
));