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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 | |
| 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')
| -rw-r--r-- | src/include/ipxe/entropy.h | 1 | ||||
| -rw-r--r-- | src/include/ipxe/errfile.h | 1 | ||||
| -rw-r--r-- | src/include/ipxe/linux/linux_entropy.h | 32 |
3 files changed, 34 insertions, 0 deletions
diff --git a/src/include/ipxe/entropy.h b/src/include/ipxe/entropy.h index 50ba4fc63..adf325e79 100644 --- a/src/include/ipxe/entropy.h +++ b/src/include/ipxe/entropy.h @@ -54,6 +54,7 @@ typedef uint8_t entropy_sample_t; /* Include all architecture-independent entropy API headers */ #include <ipxe/null_entropy.h> +#include <ipxe/linux/linux_entropy.h> /* Include all architecture-dependent entropy API headers */ #include <bits/entropy.h> diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 050bf3fec..bfb738a4a 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -247,6 +247,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define ERRFILE_drbg ( ERRFILE_OTHER | 0x00250000 ) #define ERRFILE_entropy ( ERRFILE_OTHER | 0x00260000 ) #define ERRFILE_rsa ( ERRFILE_OTHER | 0x00270000 ) +#define ERRFILE_linux_entropy ( ERRFILE_OTHER | 0x00280000 ) /** @} */ 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 */ |