diff options
Diffstat (limited to 'src/rng/hmac_rng/hmac_rng.h')
| -rw-r--r-- | src/rng/hmac_rng/hmac_rng.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/rng/hmac_rng/hmac_rng.h b/src/rng/hmac_rng/hmac_rng.h index dbadb2a04..e735a7899 100644 --- a/src/rng/hmac_rng/hmac_rng.h +++ b/src/rng/hmac_rng/hmac_rng.h @@ -13,12 +13,14 @@ namespace Botan { /** -HMAC_RNG - based on the design described in"On Extract-then-Expand Key -Derivation Functions and an HMAC-based KDF" by Hugo Krawczyk +HMAC_RNG - based on the design described in "On Extract-then-Expand +Key Derivation Functions and an HMAC-based KDF" by Hugo Krawczyk (henceforce, 'E-t-E') However it actually can be parameterized with any two MAC functions, -not restricted to HMAC (this is also described in Krawczyk's paper) +not restricted to HMAC (this variation is also described in Krawczyk's +paper), for instance one could use HMAC(SHA-512) as the extractor +and CMAC(AES-256) as the PRF. */ class BOTAN_DLL HMAC_RNG : public RandomNumberGenerator { @@ -32,8 +34,8 @@ class BOTAN_DLL HMAC_RNG : public RandomNumberGenerator void add_entropy_source(EntropySource* es); void add_entropy(const byte[], u32bit); - HMAC_RNG(MessageAuthenticationCode*, - MessageAuthenticationCode*); + HMAC_RNG(MessageAuthenticationCode* extractor, + MessageAuthenticationCode* prf); ~HMAC_RNG(); private: |