summaryrefslogtreecommitdiffstats
path: root/polyp/authkey.c
diff options
context:
space:
mode:
authorLennart Poettering <lennart@poettering.net>2004-07-17 14:12:30 +0000
committerLennart Poettering <lennart@poettering.net>2004-07-17 14:12:30 +0000
commit41f6aea8fdbc744c13bc461056a2d694a5c4d06f (patch)
tree1e23911c1f61c66df3fba272af53475508a7a7ce /polyp/authkey.c
parent563201e128d600ec1ae4a33ca81d03b776501f82 (diff)
rename src to polyp
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@90 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'polyp/authkey.c')
-rw-r--r--polyp/authkey.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/polyp/authkey.c b/polyp/authkey.c
new file mode 100644
index 00000000..3180b8fd
--- /dev/null
+++ b/polyp/authkey.c
@@ -0,0 +1,151 @@
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ polypaudio 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with polypaudio; 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 "authkey.h"
+#include "util.h"
+
+#define RANDOM_DEVICE "/dev/urandom"
+
+static int load(const char *fn, void *data, size_t length) {
+ int fd = -1, ret = -1;
+ ssize_t r;
+
+ assert(fn && data && length);
+
+ if ((fd = open(fn, O_RDONLY)) < 0)
+ goto finish;
+
+ if ((r = pa_loop_read(fd, data, length)) < 0 || (size_t) r != length) {
+ ret = -2;
+ goto finish;
+ }
+
+ ret = 0;
+
+finish:
+ if (fd >= 0)
+ close(fd);
+
+ return ret;
+}
+
+static int generate(const char *fn, void *data, size_t length) {
+ int fd = -1, random_fd = -1, ret = -1;
+ ssize_t r;
+ assert(fn && data && length);
+
+ if ((fd = open(fn, O_WRONLY|O_EXCL|O_CREAT, S_IRUSR | S_IWUSR)) < 0)
+ goto finish;
+
+ if ((random_fd = open(RANDOM_DEVICE, O_RDONLY)) >= 0) {
+
+ if ((r = pa_loop_read(random_fd, data, length)) < 0 || (size_t) r != length) {
+ ret = -2;
+ goto finish;
+ }
+
+ } else {
+ uint8_t *p;
+ size_t l;
+ fprintf(stderr, "WARNING: Failed to open entropy device '"RANDOM_DEVICE"': %s, falling back to unsecure pseudo RNG.\n", strerror(errno));
+
+ srandom(time(NULL));
+
+ for (p = data, l = length; l > 0; p++, l--)
+ *p = (uint8_t) random();
+ }
+
+ if ((r = pa_loop_write(fd, data, length)) < 0 || (size_t) r != length) {
+ ret = -2;
+ goto finish;
+ }
+
+ ret = 0;
+
+finish:
+ if (fd >= 0) {
+ if (ret != 0)
+ unlink(fn);
+ close(fd);
+ }
+ if (random_fd >= 0)
+ close(random_fd);
+
+ return ret;
+}
+
+int pa_authkey_load(const char *path, void *data, size_t length) {
+ int ret, i;
+
+ assert(path && data && length);
+
+ for (i = 0; i < 10; i++) {
+ if ((ret = load(path, data, length)) < 0)
+ if (ret == -1 && errno == ENOENT)
+ if ((ret = generate(path, data, length)) < 0)
+ if (ret == -1 && errno == EEXIST)
+ continue;
+ break;
+ }
+
+ if (ret < 0)
+ fprintf(stderr, "Failed to load authorization key '%s': %s\n", path, (ret == -1) ? strerror(errno) : "file corrupt");
+
+ return ret;
+}
+
+int pa_authkey_load_from_home(const char *fn, void *data, size_t length) {
+ char *home;
+ char path[PATH_MAX];
+
+ assert(fn && data && length);
+
+ if (!(home = getenv("HOME")))
+ return -2;
+
+ snprintf(path, sizeof(path), "%s/%s", home, fn);
+
+ return pa_authkey_load(path, data, length);
+}
+
+int pa_authkey_load_auto(const char *fn, void *data, size_t length) {
+ assert(fn && data && length);
+
+ if (*fn == '/')
+ return pa_authkey_load(fn, data, length);
+ else
+ return pa_authkey_load_from_home(fn, data, length);
+}