101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/*
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* Copyright (C) 2019 Andreas Steffen
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*
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* Copyright (C) secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup drbg drbg
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* @{ @ingroup crypto
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*/
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#ifndef DRBG_H_
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#define DRBG_H_
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typedef enum drbg_type_t drbg_type_t;
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typedef struct drbg_t drbg_t;
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#include <library.h>
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/**
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* Deterministic Random Bit Generator.(DRBG) Type
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*/
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enum drbg_type_t {
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DRBG_UNDEFINED,
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DRBG_HMAC_SHA1,
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DRBG_HMAC_SHA256,
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DRBG_HMAC_SHA384,
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DRBG_HMAC_SHA512,
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DRBG_CTR_AES128,
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DRBG_CTR_AES192,
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DRBG_CTR_AES256,
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};
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/**
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* enum name for drbg_type_t.
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*/
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extern enum_name_t *drbg_type_names;
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/**
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* Interface for a Deterministic Random Bit Generator (DRBG)
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* compliant with NIST SP 800-90A
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*/
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struct drbg_t {
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/**
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* Return the type of the DRBG
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*
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* @return DRBG type
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*/
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drbg_type_t (*get_type)(drbg_t *this);
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/**
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* Return the security strength of the DRBG
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*
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* @return configured security strength in bits
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*/
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uint32_t (*get_strength)(drbg_t *this);
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/**
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* Reseed the instantiated DRBG
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*
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* @return TRUE if successful
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*/
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bool (*reseed)(drbg_t *this);
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/**
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* Generate pseudorandom bytes.
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* If the maximum number of requests has been reached, reseeding occurs
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*
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* @param len number of octets to generate
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* @param out address of output buffer
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* @return TRUE if successful
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*/
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bool (*generate)(drbg_t *this, uint32_t len, uint8_t *out);
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/**
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* Get a reference on an drbg_t object increasing the count by one
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*
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* @return reference to the drbg_t object
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*/
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drbg_t* (*get_ref)(drbg_t *this);
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/**
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* Uninstantiate and destroy the DRBG object
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*/
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void (*destroy)(drbg_t *this);
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};
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#endif /** DRBG_H_ @}*/
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