diff options
Diffstat (limited to 'src/lib/rng/stateful_rng/stateful_rng.h')
| -rw-r--r-- | src/lib/rng/stateful_rng/stateful_rng.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/src/lib/rng/stateful_rng/stateful_rng.h b/src/lib/rng/stateful_rng/stateful_rng.h index ed51aac6a..d02be5659 100644 --- a/src/lib/rng/stateful_rng/stateful_rng.h +++ b/src/lib/rng/stateful_rng/stateful_rng.h @@ -103,15 +103,30 @@ class BOTAN_DLL Stateful_RNG : public RandomNumberGenerator */ virtual size_t security_level() const = 0; + /** + * Some DRBGs have a notion of the maximum number of bytes per + * request. Longer requests (to randomize) will be treated as + * multiple requests, and may initiate reseeding multiple times, + * depending on the values of max_number_of_bytes_per_request and + * reseed_interval(). This function returns zero if the RNG in + * question does not have such a notion. + * + * @return max number of bytes per request (or zero) + */ + virtual size_t max_number_of_bytes_per_request() const = 0; + + size_t reseed_interval() const { return m_reseed_interval; } + void clear() override; protected: - /** - * Called with lock held - */ void reseed_check(); - uint32_t last_pid() const { return m_last_pid; } + /** + * Called by a subclass to notify that a reseed has been + * successfully performed. + */ + void reset_reseed_counter() { m_reseed_counter = 1; } private: // A non-owned and possibly null pointer to shared RNG @@ -123,7 +138,6 @@ class BOTAN_DLL Stateful_RNG : public RandomNumberGenerator const size_t m_reseed_interval; uint32_t m_last_pid = 0; - protected: /* * Set to 1 after a successful seeding, then incremented. Reset * to 0 by clear() or a fork. This logic is used even if |