-rw-r--r-- 507 lib25519-20220726/randombytes/devurandom.c raw
#include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include "randombytes.h" static int fd = -1; void randombytes(unsigned char *x,long long xlen) { int i; if (fd == -1) { for (;;) { fd = open("/dev/urandom",O_RDONLY); if (fd != -1) break; sleep(1); } } while (xlen > 0) { if (xlen < 1048576) i = xlen; else i = 1048576; i = read(fd,x,i); if (i < 1) { sleep(1); continue; } x += i; xlen -= i; } }