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| author | Michael Brown | 2012-03-18 18:03:58 +0100 |
|---|---|---|
| committer | Michael Brown | 2012-03-18 18:06:03 +0100 |
| commit | 5af9e6219646ace094cfe35caa0125cbff8f38f8 (patch) | |
| tree | 8b53d125f9e52d85641610b3ddfd99bf1a55b534 /src/include/ipxe/linux | |
| parent | [rng] Allow entropy_enable() to return an error (diff) | |
| download | ipxe-5af9e6219646ace094cfe35caa0125cbff8f38f8.tar.gz ipxe-5af9e6219646ace094cfe35caa0125cbff8f38f8.tar.xz ipxe-5af9e6219646ace094cfe35caa0125cbff8f38f8.zip | |
[rng] Add Linux entropy source using /dev/random
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/linux')
| -rw-r--r-- | src/include/ipxe/linux/linux_entropy.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/include/ipxe/linux/linux_entropy.h b/src/include/ipxe/linux/linux_entropy.h new file mode 100644 index 000000000..bd89bd52f --- /dev/null +++ b/src/include/ipxe/linux/linux_entropy.h @@ -0,0 +1,32 @@ +#ifndef _IPXE_LINUX_ENTROPY_H +#define _IPXE_LINUX_ENTROPY_H + +/** @file + * + * iPXE entropy API for linux + * + */ + +FILE_LICENCE(GPL2_OR_LATER); + +#ifdef ENTROPY_LINUX +#define ENTROPY_PREFIX_linux +#else +#define ENTROPY_PREFIX_linux __linux_ +#endif + +/** + * min-entropy per sample + * + * @ret min_entropy min-entropy of each sample + */ +static inline __always_inline double +ENTROPY_INLINE ( linux, min_entropy_per_sample ) ( void ) { + + /* We read single bytes from /dev/random and assume that each + * contains full entropy. + */ + return 8; +} + +#endif /* _IPXE_LINUX_ENTROPY_H */ |