diff options
| -rw-r--r-- | configure.ac | 1 | ||||
| -rw-r--r-- | random.c | 20 |
2 files changed, 19 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 3d1c5b6225..f672f6d7f7 100644 --- a/configure.ac +++ b/configure.ac @@ -1876,6 +1876,7 @@ AC_CHECK_FUNCS(ftruncate) AC_CHECK_FUNCS(ftruncate64) # used for Win32 platform AC_CHECK_FUNCS(getattrlist) AC_CHECK_FUNCS(getcwd) +AC_CHECK_FUNCS(getentropy) AC_CHECK_FUNCS(getgidx) AC_CHECK_FUNCS(getgrnam) AC_CHECK_FUNCS(getgrnam_r) @@ -49,7 +49,7 @@ # include <sys/param.h> #endif -#if defined HAVE_GETRANDOM +#if defined HAVE_GETRANDOM || defined HAVE_GETENTROPY # include <sys/random.h> #elif defined __linux__ && defined __NR_getrandom # include <linux/random.h> @@ -425,7 +425,23 @@ random_init(int argc, VALUE *argv, VALUE obj) # define USE_DEV_URANDOM 0 #endif -#if USE_DEV_URANDOM +#if HAVE_GETENTROPY +# define MAX_SEED_LEN_PER_READ 256 +static int +fill_random_bytes_urandom(void *seed, size_t size) +{ + unsigned char *p = (unsigned char *)seed; + while (size) { + size_t len = size < MAX_SEED_LEN_PER_READ ? size : MAX_SEED_LEN_PER_READ; + if (getentropy(p, len) != 0) { + return -1; + } + p += len; + size -= len; + } + return 0; +} +#elif USE_DEV_URANDOM static int fill_random_bytes_urandom(void *seed, size_t size) { |