diff options
Diffstat (limited to 'winsup/cygwin/fhandler_random.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_random.cc | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/winsup/cygwin/fhandler_random.cc b/winsup/cygwin/fhandler_random.cc index 0d28738de..375398296 100644 --- a/winsup/cygwin/fhandler_random.cc +++ b/winsup/cygwin/fhandler_random.cc @@ -11,6 +11,7 @@ details. */ #include "winsup.h" #include <unistd.h> +#include <sys/param.h> #include "cygerrno.h" #include "path.h" #include "fhandler.h" @@ -65,10 +66,10 @@ fhandler_dev_random::write (const void *ptr, size_t len) return -1; } - /* Limit len to a value <= 512 since we don't want to overact. + /* Limit len to a value <= 4096 since we don't want to overact. Copy to local buffer because CryptGenRandom violates const. */ - unsigned char buf[512]; - size_t limited_len = len <= 512 ? len : 512; + size_t limited_len = MIN (len, 4096); + unsigned char buf[limited_len]; memcpy (buf, ptr, limited_len); /* Mess up system entropy source. Return error if device is /dev/random. */ |