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| author |   Akinobu Mita <akinobu.mita@gmail.com> | 2012-12-17 16:04:25 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:26 -0800 |
| commit | 6582c665d6b882dad8329e05749fbcf119f1ab88 (patch) | |
| tree | c40cbd6ed26fb1fea9d63d9244e6ce377d8196fd /include | |
| parent | random32: rename random32 to prandom (diff) | |
| download | linux-dev-6582c665d6b882dad8329e05749fbcf119f1ab88.tar.xz linux-dev-6582c665d6b882dad8329e05749fbcf119f1ab88.zip | |
prandom: introduce prandom_bytes() and prandom_bytes_state()
Add functions to get the requested number of pseudo-random bytes.
The difference from get_random_bytes() is that it generates pseudo-random
numbers by prandom_u32(). It doesn't consume the entropy pool, and the
sequence is reproducible if the same rnd_state is used. So it is suitable
for generating random bytes for testing.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: David Laight <david.laight@aculab.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Robert Love <robert.w.love@intel.com>
Cc: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/random.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/random.h b/include/linux/random.h index db6debc6649e..d9846088c2c5 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -26,6 +26,7 @@ unsigned int get_random_int(void); unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len); u32 prandom_u32(void); +void prandom_bytes(void *buf, int nbytes); void prandom_seed(u32 seed); /* @@ -36,6 +37,7 @@ void prandom_seed(u32 seed); #define srandom32(seed) prandom_seed(seed) u32 prandom_u32_state(struct rnd_state *); +void prandom_bytes_state(struct rnd_state *state, void *buf, int nbytes); /* * Handle minimum values for seeds |