drbg: Implemented NIST SP-800-90A DRBG
This commit is contained in:
Andreas Steffen
@@ -0,0 +1,18 @@
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AM_CPPFLAGS = \
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-I$(top_srcdir)/src/libstrongswan
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AM_CFLAGS = \
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$(PLUGIN_CFLAGS)
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if MONOLITHIC
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noinst_LTLIBRARIES = libstrongswan-drbg.la
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else
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plugin_LTLIBRARIES = libstrongswan-drbg.la
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endif
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libstrongswan_drbg_la_SOURCES = \
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drbg_plugin.h drbg_plugin.c \
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drbg_ctr.h drbg_ctr.c \
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drbg_hmac.h drbg_hmac.c
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libstrongswan_drbg_la_LDFLAGS = -module -avoid-version
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@@ -0,0 +1,356 @@
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/*
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* Copyright (C) 2016-2019 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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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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#include "drbg_ctr.h"
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#define MAX_DRBG_REQUESTS 0xfffffffe
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typedef struct private_drbg_ctr_t private_drbg_ctr_t;
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/**
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* Private data of an drbg_ctr_t object.
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*/
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struct private_drbg_ctr_t {
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/**
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* Public drbg_ctr_t interface.
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*/
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drbg_ctr_t public;
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/**
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* DRBG type.
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*/
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drbg_type_t type;
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/**
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* Security strength in bits.
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*/
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uint32_t strength;
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/**
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* Number of requests for pseudorandom bits
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*/
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uint32_t reseed_counter;
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/**
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* Maximum number of requests for pseudorandom bits
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*/
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uint32_t max_requests;
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/**
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* True entropy source
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*/
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rng_t *entropy;
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/**
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* Block cipher in counter mode used by the DRBG
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*/
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crypter_t *crypter;
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/**
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* Internal state of HMAC: key
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*/
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chunk_t key;
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/**
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* Internal state of HMAC: value
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*/
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chunk_t value;
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/**
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* reference count
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*/
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refcount_t ref;
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};
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METHOD(drbg_t, get_type, drbg_type_t,
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private_drbg_ctr_t *this)
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{
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return this->type;
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}
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METHOD(drbg_t, get_strength, uint32_t,
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private_drbg_ctr_t *this)
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{
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return this->strength;
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}
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static bool encrypt_ctr(private_drbg_ctr_t *this, chunk_t out)
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{
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chunk_t iv = chunk_alloca(this->value.len);
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chunk_t bl = chunk_alloca(this->value.len);
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chunk_t block;
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size_t delta, pos = 0;
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int bit;
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/* Initialize IV to all zeroes for ECB mode */
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memset(iv.ptr, 0x00, iv.len);
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if (!this->crypter->set_key(this->crypter, this->key))
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{
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return FALSE;
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}
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while (pos < out.len)
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{
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/* Increment counter by one */
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chunk_increment(this->value);
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/* Copy current counter to input block */
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delta = out.len - pos;
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block = (delta < this->value.len) ?
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bl : chunk_create(out.ptr + pos, this->value.len);
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memcpy(block.ptr, this->value.ptr, this->value.len);
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/* ECB encryption */
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if (!this->crypter->encrypt(this->crypter, block, iv, NULL))
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{
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return FALSE;
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}
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/* Partial output block at the end? */
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if (delta < this->value.len)
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{
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memcpy(out.ptr + pos, block.ptr, delta);
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}
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pos += this->value.len;
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}
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return TRUE;
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}
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/**
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* Update the internal state of the CTR_DRBG
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*/
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static bool update(private_drbg_ctr_t *this, chunk_t data)
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{
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chunk_t temp;
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if (data.len && data.len != (this->key.len + this->value.len))
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{
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return FALSE;
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}
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temp = chunk_alloca(this->key.len + this->value.len);
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if (!encrypt_ctr(this, temp))
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{
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return FALSE;
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}
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/* Apply data */
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memxor(temp.ptr, data.ptr, data.len);
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/* Copy new key and value */
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memcpy(this->key.ptr, temp.ptr, this->key.len);
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memcpy(this->value.ptr, temp.ptr + this->key.len, this->value.len);
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memwipe(temp.ptr, temp.len);
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DBG4(DBG_LIB, "CTR_DRBG K: %B", &this->key);
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DBG4(DBG_LIB, "CTR_DRBG V: %B", &this->value);
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return TRUE;
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}
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METHOD(drbg_t, reseed, bool,
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private_drbg_ctr_t *this)
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{
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chunk_t seed;
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bool success;
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seed = chunk_alloc(this->key.len + this->value.len);
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DBG2(DBG_LIB, "DRBG requests %u bytes of entropy", seed.len);
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if (!this->entropy->get_bytes(this->entropy, seed.len, seed.ptr))
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{
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chunk_free(&seed);
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return FALSE;
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}
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DBG4(DBG_LIB, "reseed: %B", &seed);
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success = update(this, seed);
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chunk_clear(&seed);
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if (!success)
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{
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return FALSE;
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}
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this->reseed_counter = 1;
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return TRUE;
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}
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METHOD(drbg_t, generate, bool,
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private_drbg_ctr_t *this, uint32_t len, uint8_t *out)
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{
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chunk_t output;
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if (this->reseed_counter > this->max_requests)
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{
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if (!reseed(this))
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{
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return FALSE;
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}
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}
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DBG2(DBG_LIB, "DRBG generates %u pseudorandom bytes", len);
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if (!out || len == 0)
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{
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return FALSE;
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}
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output = chunk_create(out, len);
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if (!encrypt_ctr(this, output))
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{
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return FALSE;
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}
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DBG4(DBG_LIB, "CTR_DRBG Out: %B", &output);
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if (!update(this, chunk_empty))
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{
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return FALSE;
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}
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this->reseed_counter++;
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return TRUE;
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}
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METHOD(drbg_t, get_ref, drbg_t*,
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private_drbg_ctr_t *this)
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{
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ref_get(&this->ref);
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return &this->public.interface;
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}
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METHOD(drbg_t, destroy, void,
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private_drbg_ctr_t *this)
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{
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if (ref_put(&this->ref))
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{
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this->crypter->destroy(this->crypter);
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chunk_clear(&this->key);
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chunk_clear(&this->value);
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free(this);
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}
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}
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/**
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* See header
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*/
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drbg_ctr_t *drbg_ctr_create(drbg_type_t type, uint32_t strength,
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rng_t *entropy, chunk_t personalization_str)
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{
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private_drbg_ctr_t *this;
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encryption_algorithm_t crypter_type;
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crypter_t *crypter;
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chunk_t seed;
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size_t key_len, out_len, seed_len;
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uint32_t max_requests;
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bool success;
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switch (type)
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{
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case DRBG_CTR_AES128:
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crypter_type = ENCR_AES_CBC;
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key_len = 16;
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break;
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case DRBG_CTR_AES192:
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crypter_type = ENCR_AES_CBC;
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key_len = 24;
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break;
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case DRBG_CTR_AES256:
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crypter_type = ENCR_AES_CBC;
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key_len = 32;
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break;
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default:
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DBG1(DBG_LIB, "%N not supported", drbg_type_names, type);
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return NULL;
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}
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if (strength > key_len * BITS_PER_BYTE)
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{
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DBG1(DBG_LIB, "%d bit block encryption key not sufficient for security "
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"strength of % bits", key_len * BITS_PER_BYTE, strength);
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return NULL;
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}
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crypter = lib->crypto->create_crypter(lib->crypto, crypter_type, key_len);
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if (!crypter)
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{
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DBG1(DBG_LIB, "creation of %N for DRBG failed",
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encryption_algorithm_names, crypter_type);
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return NULL;
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}
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out_len = crypter->get_block_size(crypter);
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seed_len = key_len + out_len;
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if (personalization_str.len > seed_len)
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{
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DBG1(DBG_LIB, "personalization string length of %d bytes is larger "
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"than seed length of % bytes", personalization_str.len, seed_len);
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crypter->destroy(crypter);
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return NULL;
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}
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max_requests = lib->settings->get_int(lib->settings,
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"%s.plugins.drbg.max_drbg_requests",
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MAX_DRBG_REQUESTS, lib->ns);
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INIT(this,
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.public = {
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.interface = {
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.get_type = _get_type,
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.get_strength = _get_strength,
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.reseed = _reseed,
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.generate = _generate,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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},
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.type = type,
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.strength = strength,
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.entropy = entropy,
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.crypter = crypter,
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.key = chunk_alloc(key_len),
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.value = chunk_alloc(out_len),
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.max_requests = max_requests,
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.reseed_counter = 1,
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.ref = 1,
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);
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memset(this->key.ptr, 0x00, key_len);
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memset(this->value.ptr, 0x00, out_len);
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seed = chunk_alloc(seed_len);
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DBG2(DBG_LIB, "DRBG requests %u bytes of entropy", seed_len);
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if (!this->entropy->get_bytes(this->entropy, seed.len, seed.ptr))
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{
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chunk_free(&seed);
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destroy(this);
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return NULL;
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}
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memxor(seed.ptr, personalization_str.ptr, personalization_str.len);
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DBG4(DBG_LIB, "seed: %B", &seed);
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success = update(this, seed);
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chunk_clear(&seed);
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if (!success)
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{
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destroy(this);
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return NULL;
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}
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return &this->public;
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}
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@@ -0,0 +1,51 @@
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/*
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* Copyright (C) 2019 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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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
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
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*/
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/**
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* @defgroup drbg_ctr drbg_ctr
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* @{ @ingroup drbg
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*/
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#ifndef DRBG_CTR_H_
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#define DRBG_CTR_H_
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#include <crypto/drbgs/drbg.h>
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typedef struct drbg_ctr_t drbg_ctr_t;
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/**
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* NIST SP 800-90A CTR DRBC implementation
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*/
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struct drbg_ctr_t {
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/**
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* Public Deterministic Random Bit Generator (DRBG) Interface
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*/
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drbg_t interface;
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};
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/**
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* Create a drbg_ctr instance.
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*
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* @param type DRBG CTR type
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* @param strength security strength in bits
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* @param entropy entropy source to be used
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* @param personalization_str optional personalization string
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* @return drbg_ctr_t object, NULL if not supported
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*/
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drbg_ctr_t *drbg_ctr_create(drbg_type_t type, uint32_t strength,
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rng_t *entropy, chunk_t personalization_str);
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#endif /** DRBG_CTR_H_ @}*/
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@@ -0,0 +1,319 @@
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/*
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* Copyright (C) 2016-2019 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
|
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*
|
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* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* 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
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
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*/
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#include "drbg_hmac.h"
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#define MAX_DRBG_REQUESTS 0xfffffffe
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typedef struct private_drbg_hmac_t private_drbg_hmac_t;
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/**
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* Private data of an drbg_prf_t object.
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*/
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struct private_drbg_hmac_t {
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/**
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* Public drbg_prf_t interface.
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*/
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drbg_hmac_t public;
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/**
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* DRBG type.
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*/
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drbg_type_t type;
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/**
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* Security strength in bits.
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*/
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uint32_t strength;
|
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|
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/**
|
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* Number of requests for pseudorandom bits
|
||||
*/
|
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size_t reseed_counter;
|
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|
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/**
|
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* Maximum number of requests for pseudorandom bits
|
||||
*/
|
||||
size_t max_requests;
|
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|
||||
/**
|
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* True entropy source
|
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*/
|
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rng_t *entropy;
|
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/**
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* HMAC PRF used by the DRBG
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*/
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prf_t *prf;
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/**
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* Internal state of HMAC: key
|
||||
*/
|
||||
chunk_t key;
|
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|
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/**
|
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* Internal state of HMAC: value
|
||||
*/
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chunk_t value;
|
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/**
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* reference count
|
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*/
|
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refcount_t ref;
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};
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METHOD(drbg_t, get_type, drbg_type_t,
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private_drbg_hmac_t *this)
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{
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return this->type;
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}
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METHOD(drbg_t, get_strength, uint32_t,
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private_drbg_hmac_t *this)
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{
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return this->strength;
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}
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|
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/**
|
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* Update the internal state of the HMAC_DRBG
|
||||
*/
|
||||
static bool update(private_drbg_hmac_t *this, chunk_t data)
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||||
{
|
||||
chunk_t ch_00 = chunk_from_chars(0x00);
|
||||
chunk_t ch_01 = chunk_from_chars(0x01);
|
||||
|
||||
if (!this->prf->set_key(this->prf, this->key) ||
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!this->prf->get_bytes(this->prf, this->value, NULL) ||
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!this->prf->get_bytes(this->prf, ch_00, NULL) ||
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!this->prf->get_bytes(this->prf, data, this->key.ptr) ||
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!this->prf->set_key(this->prf, this->key) ||
|
||||
!this->prf->get_bytes(this->prf, this->value, this->value.ptr))
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if (data.len > 0)
|
||||
{
|
||||
if (!this->prf->set_key(this->prf, this->key) ||
|
||||
!this->prf->get_bytes(this->prf, this->value, NULL) ||
|
||||
!this->prf->get_bytes(this->prf, ch_01, NULL) ||
|
||||
!this->prf->get_bytes(this->prf, data, this->key.ptr) ||
|
||||
!this->prf->set_key(this->prf, this->key) ||
|
||||
!this->prf->get_bytes(this->prf, this->value, this->value.ptr))
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
DBG4(DBG_LIB, "HMAC_DRBG K: %B", &this->key);
|
||||
DBG4(DBG_LIB, "HMAC_DRBG V: %B", &this->value);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
METHOD(drbg_t, reseed, bool,
|
||||
private_drbg_hmac_t *this)
|
||||
{
|
||||
chunk_t seed;
|
||||
bool success;
|
||||
|
||||
seed = chunk_alloc(this->strength / BITS_PER_BYTE);
|
||||
DBG2(DBG_LIB, "DRBG requests %u bytes of entropy", seed.len);
|
||||
|
||||
if (!this->entropy->get_bytes(this->entropy, seed.len, seed.ptr))
|
||||
{
|
||||
chunk_free(&seed);
|
||||
return FALSE;
|
||||
}
|
||||
DBG4(DBG_LIB, "reseed: %B", &seed);
|
||||
|
||||
success = update(this, seed);
|
||||
chunk_clear(&seed);
|
||||
|
||||
if (!success)
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
this->reseed_counter = 1;
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
METHOD(drbg_t, generate, bool,
|
||||
private_drbg_hmac_t *this, uint32_t len, uint8_t *out)
|
||||
{
|
||||
size_t delta;
|
||||
chunk_t output;
|
||||
|
||||
DBG2(DBG_LIB, "DRBG generates %u pseudorandom bytes", len);
|
||||
if (!out || len == 0)
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
output = chunk_create(out, len);
|
||||
|
||||
if (this->reseed_counter > this->max_requests)
|
||||
{
|
||||
if (!reseed(this))
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
while (len)
|
||||
{
|
||||
if (!this->prf->get_bytes(this->prf, this->value, this->value.ptr))
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
delta = min(len, this->value.len);
|
||||
memcpy(out, this->value.ptr, delta);
|
||||
len -= delta;
|
||||
out += delta;
|
||||
}
|
||||
DBG4(DBG_LIB, "HMAC_DRBG Out: %B", &output);
|
||||
|
||||
if (!update(this, chunk_empty))
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
this->reseed_counter++;
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
METHOD(drbg_t, get_ref, drbg_t*,
|
||||
private_drbg_hmac_t *this)
|
||||
{
|
||||
ref_get(&this->ref);
|
||||
return &this->public.interface;
|
||||
}
|
||||
|
||||
METHOD(drbg_t, destroy, void,
|
||||
private_drbg_hmac_t *this)
|
||||
{
|
||||
if (ref_put(&this->ref))
|
||||
{
|
||||
this->prf->destroy(this->prf);
|
||||
chunk_clear(&this->key);
|
||||
chunk_clear(&this->value);
|
||||
free(this);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* See header
|
||||
*/
|
||||
drbg_hmac_t *drbg_hmac_create(drbg_type_t type, uint32_t strength,
|
||||
rng_t *entropy, chunk_t personalization_str)
|
||||
{
|
||||
private_drbg_hmac_t *this;
|
||||
pseudo_random_function_t prf_type = PRF_UNDEFINED;
|
||||
size_t out_len, entropy_len;
|
||||
uint32_t max_requests;
|
||||
chunk_t seed;
|
||||
prf_t * prf;
|
||||
bool success;
|
||||
|
||||
switch (type)
|
||||
{
|
||||
case DRBG_HMAC_SHA1:
|
||||
prf_type = PRF_HMAC_SHA1;
|
||||
break;
|
||||
case DRBG_HMAC_SHA256:
|
||||
prf_type = PRF_HMAC_SHA2_256;
|
||||
break;
|
||||
case DRBG_HMAC_SHA384:
|
||||
prf_type = PRF_HMAC_SHA2_384;
|
||||
break;
|
||||
case DRBG_HMAC_SHA512:
|
||||
prf_type = PRF_HMAC_SHA2_512;
|
||||
break;
|
||||
default:
|
||||
DBG1(DBG_LIB, "%N not supported", drbg_type_names, type);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
prf = lib->crypto->create_prf(lib->crypto, prf_type);
|
||||
if (!prf)
|
||||
{
|
||||
DBG1(DBG_LIB, "creation of %N for DRBG failed",
|
||||
pseudo_random_function_names, prf_type);
|
||||
return NULL;
|
||||
}
|
||||
out_len = prf->get_key_size(prf);
|
||||
|
||||
if (strength > out_len * BITS_PER_BYTE)
|
||||
{
|
||||
DBG1(DBG_LIB, "%N not sufficient for security strength of % bits",
|
||||
pseudo_random_function_names, prf_type, strength);
|
||||
prf->destroy(prf);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
max_requests = lib->settings->get_int(lib->settings,
|
||||
"%s.plugins.drbg.max_drbg_requests",
|
||||
MAX_DRBG_REQUESTS, lib->ns);
|
||||
|
||||
INIT(this,
|
||||
.public = {
|
||||
.interface = {
|
||||
.get_type = _get_type,
|
||||
.get_strength = _get_strength,
|
||||
.reseed = _reseed,
|
||||
.generate = _generate,
|
||||
.get_ref = _get_ref,
|
||||
.destroy = _destroy,
|
||||
},
|
||||
},
|
||||
.type = type,
|
||||
.strength = strength,
|
||||
.entropy = entropy,
|
||||
.prf = prf,
|
||||
.key = chunk_alloc(out_len),
|
||||
.value = chunk_alloc(out_len),
|
||||
.max_requests = max_requests,
|
||||
.reseed_counter = 1,
|
||||
.ref = 1,
|
||||
);
|
||||
|
||||
memset(this->key.ptr, 0x00, out_len);
|
||||
memset(this->value.ptr, 0x01, out_len);
|
||||
|
||||
entropy_len = (strength + strength/2) / BITS_PER_BYTE;
|
||||
seed = chunk_alloc(entropy_len + personalization_str.len);
|
||||
DBG2(DBG_LIB, "DRBG requests %u bytes of entropy", entropy_len);
|
||||
|
||||
if (!this->entropy->get_bytes(this->entropy, entropy_len, seed.ptr))
|
||||
{
|
||||
chunk_free(&seed);
|
||||
destroy(this);
|
||||
return NULL;
|
||||
}
|
||||
memcpy(seed.ptr + entropy_len,
|
||||
personalization_str.ptr, personalization_str.len);
|
||||
DBG4(DBG_LIB, "seed: %B", &seed);
|
||||
|
||||
success = update(this, seed);
|
||||
chunk_clear(&seed);
|
||||
|
||||
if (!success)
|
||||
{
|
||||
destroy(this);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return &this->public;
|
||||
}
|
||||
@@ -0,0 +1,51 @@
|
||||
/*
|
||||
* Copyright (C) 2019 Andreas Steffen
|
||||
* HSR Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup drbg_hmac drbg_hmac
|
||||
* @{ @ingroup drbg
|
||||
*/
|
||||
|
||||
#ifndef DRBG_HMAC_H_
|
||||
#define DRBG_HMAC_H_
|
||||
|
||||
#include <crypto/drbgs/drbg.h>
|
||||
|
||||
typedef struct drbg_hmac_t drbg_hmac_t;
|
||||
|
||||
/**
|
||||
* NIST SP 800-90A HMAC DRBC implementation
|
||||
*/
|
||||
struct drbg_hmac_t {
|
||||
|
||||
/**
|
||||
* Public Deterministic Random Bit Generator (DRBG) Interface
|
||||
*/
|
||||
drbg_t interface;
|
||||
};
|
||||
|
||||
/**
|
||||
* Create a drbg_hmac instance.
|
||||
*
|
||||
* @param type DRBG HMAC type
|
||||
* @param strength security strength in bits
|
||||
* @param entropy entropy source to be used
|
||||
* @param personalization_str optional personalization string
|
||||
* @return drbg_hmac_t object, NULL if not supported
|
||||
*/
|
||||
drbg_hmac_t *drbg_hmac_create(drbg_type_t type, uint32_t strength,
|
||||
rng_t *entropy, chunk_t personalization_str);
|
||||
|
||||
#endif /** DRBG_HMAC_H_ @}*/
|
||||
@@ -0,0 +1,92 @@
|
||||
/*
|
||||
* Copyright (C) 2019 Andreas Steffen
|
||||
* HSR Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#include "drbg_plugin.h"
|
||||
#include "drbg_ctr.h"
|
||||
#include "drbg_hmac.h"
|
||||
|
||||
#include <library.h>
|
||||
|
||||
typedef struct private_drbg_plugin_t private_drbg_plugin_t;
|
||||
|
||||
/**
|
||||
* private data of drbg_plugin
|
||||
*/
|
||||
struct private_drbg_plugin_t {
|
||||
|
||||
/**
|
||||
* public functions
|
||||
*/
|
||||
drbg_plugin_t public;
|
||||
};
|
||||
|
||||
METHOD(plugin_t, get_name, char*,
|
||||
private_drbg_plugin_t *this)
|
||||
{
|
||||
return "drbg";
|
||||
}
|
||||
|
||||
METHOD(plugin_t, get_features, int,
|
||||
private_drbg_plugin_t *this, plugin_feature_t *features[])
|
||||
{
|
||||
static plugin_feature_t f[] = {
|
||||
/* NIST CTR DRBG */
|
||||
PLUGIN_REGISTER(DRBG, drbg_ctr_create),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_CTR_AES128),
|
||||
PLUGIN_DEPENDS(CRYPTER, ENCR_AES_CBC, 16),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_CTR_AES192),
|
||||
PLUGIN_DEPENDS(CRYPTER, ENCR_AES_CBC, 24),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_CTR_AES256),
|
||||
PLUGIN_DEPENDS(CRYPTER, ENCR_AES_CBC, 32),
|
||||
/* NIST HMAC DRBG */
|
||||
PLUGIN_REGISTER(DRBG, drbg_hmac_create),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_HMAC_SHA1),
|
||||
PLUGIN_DEPENDS(PRF, PRF_HMAC_SHA1),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_HMAC_SHA256),
|
||||
PLUGIN_DEPENDS(PRF, PRF_HMAC_SHA2_256),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_HMAC_SHA384),
|
||||
PLUGIN_DEPENDS(PRF, PRF_HMAC_SHA2_384),
|
||||
PLUGIN_PROVIDE(DRBG, DRBG_HMAC_SHA512),
|
||||
PLUGIN_DEPENDS(PRF, PRF_HMAC_SHA2_512),
|
||||
};
|
||||
*features = f;
|
||||
return countof(f);
|
||||
}
|
||||
|
||||
METHOD(plugin_t, destroy, void,
|
||||
private_drbg_plugin_t *this)
|
||||
{
|
||||
free(this);
|
||||
}
|
||||
|
||||
/*
|
||||
* see header file
|
||||
*/
|
||||
plugin_t *drbg_plugin_create()
|
||||
{
|
||||
private_drbg_plugin_t *this;
|
||||
|
||||
INIT(this,
|
||||
.public = {
|
||||
.plugin = {
|
||||
.get_name = _get_name,
|
||||
.get_features = _get_features,
|
||||
.destroy = _destroy,
|
||||
},
|
||||
},
|
||||
);
|
||||
|
||||
return &this->public.plugin;
|
||||
}
|
||||
@@ -0,0 +1,42 @@
|
||||
/*
|
||||
* Copyright (C) 2019 Andreas Steffen
|
||||
* HSR Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup drbg_p drbg
|
||||
* @ingroup plugins
|
||||
*
|
||||
* @defgroup drbg_plugin drbg_plugin
|
||||
* @{ @ingroup drbg_p
|
||||
*/
|
||||
|
||||
#ifndef DRBG_PLUGIN_H_
|
||||
#define DRBG_PLUGIN_H_
|
||||
|
||||
#include <plugins/plugin.h>
|
||||
|
||||
typedef struct drbg_plugin_t drbg_plugin_t;
|
||||
|
||||
/**
|
||||
* Plugin providing a NIST CTR and HMAC DRBG implementation
|
||||
*/
|
||||
struct drbg_plugin_t {
|
||||
|
||||
/**
|
||||
* implements plugin interface
|
||||
*/
|
||||
plugin_t plugin;
|
||||
};
|
||||
|
||||
#endif /** DRBG_PLUGIN_H_ @}*/
|
||||
Reference in New Issue
Block a user