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-rw-r--r--src/pulsecore/authkey.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/src/pulsecore/authkey.c b/src/pulsecore/authkey.c
new file mode 100644
index 00000000..064209d9
--- /dev/null
+++ b/src/pulsecore/authkey.c
@@ -0,0 +1,209 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ PulseAudio 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with PulseAudio; 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 <assert.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <time.h>
+#include <limits.h>
+#include <sys/stat.h>
+
+#include <pulse/util.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/log.h>
+#include <pulsecore/random.h>
+
+#include "authkey.h"
+
+/* Generate a new authorization key, store it in file fd and return it in *data */
+static int generate(int fd, void *ret_data, size_t length) {
+ ssize_t r;
+ assert(fd >= 0 && ret_data && length);
+
+ pa_random(ret_data, length);
+
+ lseek(fd, 0, SEEK_SET);
+ ftruncate(fd, 0);
+
+ if ((r = pa_loop_write(fd, ret_data, length)) < 0 || (size_t) r != length) {
+ pa_log(__FILE__": failed to write cookie file: %s", pa_cstrerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+/* Load an euthorization cookie from file fn and store it in data. If
+ * the cookie file doesn't exist, create it */
+static int load(const char *fn, void *data, size_t length) {
+ int fd = -1;
+ int writable = 1;
+ int unlock = 0, ret = -1;
+ ssize_t r;
+ assert(fn && data && length);
+
+ if ((fd = open(fn, O_RDWR|O_CREAT|O_BINARY, S_IRUSR|S_IWUSR)) < 0) {
+ if (errno != EACCES || (fd = open(fn, O_RDONLY|O_BINARY)) < 0) {
+ pa_log(__FILE__": failed to open cookie file '%s': %s", fn, pa_cstrerror(errno));
+ goto finish;
+ } else
+ writable = 0;
+ }
+
+ unlock = pa_lock_fd(fd, 1) >= 0;
+
+ if ((r = pa_loop_read(fd, data, length)) < 0) {
+ pa_log(__FILE__": failed to read cookie file '%s': %s", fn, pa_cstrerror(errno));
+ goto finish;
+ }
+
+ if ((size_t) r != length) {
+ pa_log_debug(__FILE__": got %d bytes from cookie file '%s', expected %d", (int)r, fn, (int)length);
+
+ if (!writable) {
+ pa_log(__FILE__": unable to write cookie to read only file");
+ goto finish;
+ }
+
+ if (generate(fd, data, length) < 0)
+ goto finish;
+ }
+
+ ret = 0;
+
+finish:
+
+ if (fd >= 0) {
+
+ if (unlock)
+ pa_lock_fd(fd, 0);
+
+ close(fd);
+ }
+
+ return ret;
+}
+
+/* Load a cookie from a cookie file. If the file doesn't exist, create it. */
+int pa_authkey_load(const char *path, void *data, size_t length) {
+ int ret;
+
+ assert(path && data && length);
+
+ ret = load(path, data, length);
+
+ if (ret < 0)
+ pa_log(__FILE__": Failed to load authorization key '%s': %s", path,
+ (ret == -1) ? pa_cstrerror(errno) : "file corrupt");
+
+ return ret;
+}
+
+/* If the specified file path starts with / return it, otherwise
+ * return path prepended with home directory */
+static const char *normalize_path(const char *fn, char *s, size_t l) {
+ assert(fn && s && l > 0);
+
+#ifndef OS_IS_WIN32
+ if (fn[0] != '/') {
+#else
+ if (strlen(fn) < 3 || !isalpha(fn[0]) || fn[1] != ':' || fn[2] != '\\') {
+#endif
+ char homedir[PATH_MAX];
+ if (!pa_get_home_dir(homedir, sizeof(homedir)))
+ return NULL;
+
+#ifndef OS_IS_WIN32
+ snprintf(s, l, "%s/%s", homedir, fn);
+#else
+ snprintf(s, l, "%s\\%s", homedir, fn);
+#endif
+ return s;
+ }
+
+ return fn;
+}
+
+/* Load a cookie from a file in the home directory. If the specified
+ * path starts with /, use it as absolute path instead. */
+int pa_authkey_load_auto(const char *fn, void *data, size_t length) {
+ char path[PATH_MAX];
+ const char *p;
+ assert(fn && data && length);
+
+ if (!(p = normalize_path(fn, path, sizeof(path))))
+ return -2;
+
+ return pa_authkey_load(p, data, length);
+}
+
+/* Store the specified cookie in the speicified cookie file */
+int pa_authkey_save(const char *fn, const void *data, size_t length) {
+ int fd = -1;
+ int unlock = 0, ret = -1;
+ ssize_t r;
+ char path[PATH_MAX];
+ const char *p;
+ assert(fn && data && length);
+
+ if (!(p = normalize_path(fn, path, sizeof(path))))
+ return -2;
+
+ if ((fd = open(p, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) < 0) {
+ pa_log(__FILE__": failed to open cookie file '%s': %s", fn, pa_cstrerror(errno));
+ goto finish;
+ }
+
+ unlock = pa_lock_fd(fd, 1) >= 0;
+
+ if ((r = pa_loop_write(fd, data, length)) < 0 || (size_t) r != length) {
+ pa_log(__FILE__": failed to read cookie file '%s': %s", fn, pa_cstrerror(errno));
+ goto finish;
+ }
+
+ ret = 0;
+
+finish:
+
+ if (fd >= 0) {
+
+ if (unlock)
+ pa_lock_fd(fd, 0);
+
+ close(fd);
+ }
+
+ return ret;
+}