diff options
| -rw-r--r-- | configure.ac | 1 | ||||
| -rw-r--r-- | random.c | 26 |
2 files changed, 27 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index cc9df54c0d..b9fd9ff728 100644 --- a/configure.ac +++ b/configure.ac @@ -1826,6 +1826,7 @@ AC_CHECK_FUNCS(getpgid) AC_CHECK_FUNCS(getpgrp) AC_CHECK_FUNCS(getpriority) AC_CHECK_FUNCS(getpwnam_r) +AC_CHECK_FUNCS(getrandom) AC_CHECK_FUNCS(getresgid) AC_CHECK_FUNCS(getresuid) AC_CHECK_FUNCS(getrlimit) @@ -390,6 +390,32 @@ fill_random_bytes_syscall(void *seed, size_t size, int unused) CryptGenRandom(prov, size, seed); return 0; } +#elif defined HAVE_GETRANDOM +#include <sys/random.h> + +static int +fill_random_bytes_syscall(void *seed, size_t size, int need_secure) +{ + static rb_atomic_t try_syscall = 1; + if (try_syscall) { + ssize_t ret; + size_t offset = 0; + int flags = 0; + if (!need_secure) + flags = GRND_NONBLOCK; + do { + errno = 0; + ret = getrandom(((char*)seed) + offset, size - offset, flags); + if (ret == -1) { + ATOMIC_SET(try_syscall, 0); + return -1; + } + offset += (size_t)ret; + } while(offset < size); + return 0; + } + return -1; +} #elif defined __linux__ && defined __NR_getrandom #include <linux/random.h> |