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| author | ache <ache@FreeBSD.org> | 2008-07-21 13:52:06 +0000 |
|---|---|---|
| committer | ache <ache@FreeBSD.org> | 2008-07-21 13:52:06 +0000 |
| commit | 5ed3228d52c437ca20964c105780d69d2e6892b1 (patch) | |
| tree | 76fdcd5d3b5825fc0d89a698efff7a825c0ba340 /lib/libc/gen/arc4random.c | |
| parent | 101cbb7cb3db72e499cc35d9319dac30b653d25b (diff) | |
| download | FreeBSD-src-5ed3228d52c437ca20964c105780d69d2e6892b1.zip FreeBSD-src-5ed3228d52c437ca20964c105780d69d2e6892b1.tar.gz | |
Implement arc4random_buf() function
Obtained from: OpenBSD
Diffstat (limited to 'lib/libc/gen/arc4random.c')
| -rw-r--r-- | lib/libc/gen/arc4random.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/lib/libc/gen/arc4random.c b/lib/libc/gen/arc4random.c index 6aa2323..7c11da2 100644 --- a/lib/libc/gen/arc4random.c +++ b/lib/libc/gen/arc4random.c @@ -164,7 +164,7 @@ arc4_check_init(void) } } -static void +static inline void arc4_check_stir(void) { if (!rs_stired || arc4_count <= 0) { @@ -208,6 +208,21 @@ arc4random(void) return (rnd); } +void +arc4random_buf(void *_buf, size_t n) +{ + u_char *buf = (u_char *)_buf; + + THREAD_LOCK(); + arc4_check_init(); + while (n--) { + arc4_check_stir(); + buf[n] = arc4_getbyte(&rs); + arc4_count--; + } + THREAD_UNLOCK(); +} + #if 0 /*-------- Test code for i386 --------*/ #include <stdio.h> |
