From f44ba092651aa75055e109e04b4164ea92ae7fdc Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 19 Jun 2006 21:53:48 +0000 Subject: big s/polyp/pulse/g git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/pulsecore/authkey.c | 209 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 209 insertions(+) create mode 100644 src/pulsecore/authkey.c (limited to 'src/pulsecore/authkey.c') 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 +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#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; +} -- cgit