diff options
Diffstat (limited to 'sys/dev/random/yarrow.c')
| -rw-r--r-- | sys/dev/random/yarrow.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/dev/random/yarrow.c b/sys/dev/random/yarrow.c index 304de5d..1b5a4bf 100644 --- a/sys/dev/random/yarrow.c +++ b/sys/dev/random/yarrow.c @@ -253,6 +253,7 @@ read_random_real(void *buf, int count) static int cur = 0; static int gate = 1; static u_char genval[KEYSIZE]; + size_t tomove; int i; int retval; @@ -270,14 +271,14 @@ read_random_real(void *buf, int count) random_state.counter[0]++; yarrow_encrypt(&random_state.key, random_state.counter, genval); - memcpy((char *)buf + i, genval, - sizeof(random_state.counter)); + tomove = min(count - i, sizeof(random_state.counter)); + memcpy((char *)buf + i, genval, tomove); if (++random_state.outputblocks >= random_state.gengateinterval) { generator_gate(); random_state.outputblocks = 0; } - retval += (int)sizeof(random_state.counter); + retval += (int)tomove; } } else { |
