diff options
Diffstat (limited to 'old/botan/src/rng/auto_rng/auto_rng.cpp')
-rw-r--r-- | old/botan/src/rng/auto_rng/auto_rng.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/old/botan/src/rng/auto_rng/auto_rng.cpp b/old/botan/src/rng/auto_rng/auto_rng.cpp new file mode 100644 index 0000000..8405170 --- /dev/null +++ b/old/botan/src/rng/auto_rng/auto_rng.cpp @@ -0,0 +1,158 @@ +/* +* Auto Seeded RNG +* (C) 2008 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/auto_rng.h> +#include <botan/parsing.h> +#include <botan/timer.h> +#include <botan/hmac.h> +#include <botan/sha2_32.h> +#include <botan/sha2_64.h> + +#if defined(BOTAN_HAS_RANDPOOL) + #include <botan/randpool.h> +#endif + +#if defined(BOTAN_HAS_HMAC_RNG) + #include <botan/hmac_rng.h> +#endif + +#if defined(BOTAN_HAS_X931_RNG) + #include <botan/x931_rng.h> +#endif + +#if defined(BOTAN_HAS_AES) + #include <botan/aes.h> +#endif + +#if defined(BOTAN_HAS_TIMER_HARDWARE) + #include <botan/tm_hard.h> +#endif + +#if defined(BOTAN_HAS_TIMER_POSIX) + #include <botan/tm_posix.h> +#endif + +#if defined(BOTAN_HAS_TIMER_UNIX) + #include <botan/tm_unix.h> +#endif + +#if defined(BOTAN_HAS_TIMER_WIN32) + #include <botan/tm_win32.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_DEVICE) + #include <botan/es_dev.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_EGD) + #include <botan/es_egd.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_UNIX) + #include <botan/es_unix.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_BEOS) + #include <botan/es_beos.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_CAPI) + #include <botan/es_capi.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_WIN32) + #include <botan/es_win32.h> +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_FTW) + #include <botan/es_ftw.h> +#endif + +namespace Botan { + +namespace { + +/** +* Add any known entropy sources to this RNG +*/ +void add_entropy_sources(RandomNumberGenerator* rng) + { + + // Add a high resolution timer, if available +#if defined(BOTAN_HAS_TIMER_HARDWARE) + rng->add_entropy_source(new Hardware_Timer); +#elif defined(BOTAN_HAS_TIMER_POSIX) + rng->add_entropy_source(new POSIX_Timer); +#elif defined(BOTAN_HAS_TIMER_UNIX) + rng->add_entropy_source(new Unix_Timer); +#elif defined(BOTAN_HAS_TIMER_WIN32) + rng->add_entropy_source(new Win32_Timer); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_DEVICE) + rng->add_entropy_source( + new Device_EntropySource( + split_on("/dev/urandom:/dev/random:/dev/srandom", ':') + ) + ); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_EGD) + rng->add_entropy_source( + new EGD_EntropySource(split_on("/var/run/egd-pool:/dev/egd-pool", ':')) + ); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_CAPI) + rng->add_entropy_source(new Win32_CAPI_EntropySource); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_FTW) + rng->add_entropy_source(new FTW_EntropySource("/proc")); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_WIN32) + rng->add_entropy_source(new Win32_EntropySource); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_BEOS) + rng->add_entropy_source(new BeOS_EntropySource); +#endif + +#if defined(BOTAN_HAS_ENTROPY_SRC_UNIX) + rng->add_entropy_source( + new Unix_EntropySource(split_on("/bin:/sbin:/usr/bin:/usr/sbin", ':')) + ); +#endif + } + +} + +AutoSeeded_RNG::AutoSeeded_RNG(u32bit poll_bits) + { + rng = 0; + +#if defined(BOTAN_HAS_HMAC_RNG) + rng = new HMAC_RNG(new HMAC(new SHA_512), new HMAC(new SHA_256)); +#elif defined(BOTAN_HAS_RANDPOOL) && defined(BOTAN_HAS_AES) + rng = new Randpool(new AES_256, new HMAC(new SHA_256)); +#endif + + if(!rng) + throw Algorithm_Not_Found("No usable RNG found enabled in build"); + + /* If X9.31 is available, use it to wrap the other RNG as a failsafe */ +#if defined(BOTAN_HAS_X931_RNG) && defined(BOTAN_HAS_AES) + rng = new ANSI_X931_RNG(new AES_256, rng); +#endif + + add_entropy_sources(rng); + + rng->reseed(poll_bits); + } + +} |