/* Given a pointer to some noise, and a desired length, open up the
* random_seed_file and get between 16 bytes and the desired length from
* said file, putting the entropy in the noise pointer */
void get_entropy_from_seedfile(uint8_t *noise,int len) {
char *filename = 0;
int zap = 0;
int seed = -1;
if(key_s[DWM_S_random_seed_file] == 0) {
filename = "/dev/urandom"; /* Default filename */
} else {
filename = (char *)dw_to_cstr(key_s[DWM_S_random_seed_file]);
zap = 1;
}
seed = open(filename, O_RDONLY);
if(seed == -1) {
dw_log_3strings("Fatal error opening random seed file ",
filename,"",1);
exit(1);
}
if(read(seed,(void *)noise,len) < 16) {
dw_log_3strings("Unable to get 128 bits of entropy; file ",
filename,
" must be\n at least 16 bytes (128 bits) long",1);
exit(1);
}
if(zap == 1) {
free(filename);
filename = 0;
}
close(seed);
}
/* Read mararc parameters and set global variables based on those
* parameters */
void process_mararc(char *name) {
if(dwm_parse_mararc(name) != 1) {
dw_log_3strings("Fatal error parsing file ",name,"",1);
exit(1);
}
/* The following sanity check triggers a warning; disabled */
/*if(key_s == 0 || key_d == 0) {
dw_fatal("error getting mararc parameters");
}*/
}
/* Read mararc parameters and set global variables based on those
* parameters; disable cache reading if cache file is more recent */
void process_mararc(char *name) {
if(dwm_parse_mararc(name) != 1) {
dw_log_3strings("Fatal error parsing file ",name,"",1);
exit(1);
}
/* The following sanity check triggers a warning; disabled */
/*if(key_s == 0 || key_d == 0) {
dw_fatal("error getting mararc parameters");
}*/
/* If the dwood3rc is newer than the cache file, do not read the
* cache */
if(stat(name,&mararc_st) != 0) {
dw_log_string("Can not stat rc file; not reading cache",0);
do_read_cache = 0;
}
}
