hash-algorithm-set: Add class to manage a set of hash algorithms
This commit is contained in:
Tobias Brunner
@@ -8,6 +8,7 @@ asn1/asn1.c asn1/asn1_parser.c asn1/oid.c bio/bio_reader.c bio/bio_writer.c \
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collections/blocking_queue.c collections/enumerator.c collections/hashtable.c \
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collections/array.c \
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collections/linked_list.c crypto/crypters/crypter.c crypto/hashers/hasher.c \
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crypto/hashers/hash_algorithm_set.c \
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crypto/proposal/proposal_keywords.c crypto/proposal/proposal_keywords_static.c \
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crypto/prfs/prf.c crypto/prfs/mac_prf.c crypto/pkcs5.c \
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crypto/rngs/rng.c crypto/prf_plus.c crypto/signers/signer.c \
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@@ -6,6 +6,7 @@ asn1/asn1.c asn1/asn1_parser.c asn1/oid.c bio/bio_reader.c bio/bio_writer.c \
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collections/blocking_queue.c collections/enumerator.c collections/hashtable.c \
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collections/array.c \
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collections/linked_list.c crypto/crypters/crypter.c crypto/hashers/hasher.c \
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crypto/hashers/hash_algorithm_set.c \
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crypto/proposal/proposal_keywords.c crypto/proposal/proposal_keywords_static.c \
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crypto/prfs/prf.c crypto/prfs/mac_prf.c crypto/pkcs5.c \
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crypto/rngs/rng.c crypto/prf_plus.c crypto/signers/signer.c \
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@@ -61,7 +62,8 @@ library.h \
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asn1/asn1.h asn1/asn1_parser.h asn1/oid.h bio/bio_reader.h bio/bio_writer.h \
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collections/blocking_queue.h collections/enumerator.h collections/hashtable.h \
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collections/linked_list.h collections/array.h collections/dictionary.h \
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crypto/crypters/crypter.h crypto/hashers/hasher.h crypto/mac.h \
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crypto/crypters/crypter.h crypto/hashers/hasher.h \
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crypto/hashers/hash_algorithm_set.h crypto/mac.h \
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crypto/proposal/proposal_keywords.h crypto/proposal/proposal_keywords_static.h \
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crypto/prfs/prf.h crypto/prfs/mac_prf.h crypto/rngs/rng.h crypto/nonce_gen.h \
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crypto/prf_plus.h crypto/signers/signer.h crypto/signers/mac_signer.h \
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@@ -0,0 +1,113 @@
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/*
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* Copyright (C) 2015 Tobias Brunner
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* 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 "hash_algorithm_set.h"
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#include <collections/array.h>
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typedef struct private_hash_algorithm_set_t private_hash_algorithm_set_t;
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struct private_hash_algorithm_set_t {
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/**
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* Public interface
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*/
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hash_algorithm_set_t public;
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/**
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* Algorithms contained in the set
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*/
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array_t *algorithms;
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};
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/**
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* Sort hash algorithms
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*/
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static int hash_sort(const void *a, const void *b, void *user)
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{
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const hash_algorithm_t *ha = a, *hb = b;
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return *ha - *hb;
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}
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/**
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* Find a hash algorithm
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*/
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static int hash_find(const void *a, const void *b)
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{
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return hash_sort(a, b, NULL);
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}
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METHOD(hash_algorithm_set_t, contains, bool,
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private_hash_algorithm_set_t *this, hash_algorithm_t hash)
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{
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return array_bsearch(this->algorithms, &hash, hash_find, NULL) != -1;
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}
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METHOD(hash_algorithm_set_t, add, void,
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private_hash_algorithm_set_t *this, hash_algorithm_t hash)
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{
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if (!contains(this, hash))
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{
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array_insert(this->algorithms, ARRAY_TAIL, &hash);
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array_sort(this->algorithms, hash_sort, NULL);
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}
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}
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METHOD(hash_algorithm_set_t, count, int,
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private_hash_algorithm_set_t *this)
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{
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return array_count(this->algorithms);
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}
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static bool hash_filter(void *data, void **in, hash_algorithm_t *out)
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{
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*out = **(hash_algorithm_t**)in;
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return TRUE;
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}
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METHOD(hash_algorithm_set_t, create_enumerator, enumerator_t*,
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private_hash_algorithm_set_t *this)
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{
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return enumerator_create_filter(array_create_enumerator(this->algorithms),
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(void*)hash_filter, NULL, NULL);
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}
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METHOD(hash_algorithm_set_t, destroy, void,
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private_hash_algorithm_set_t *this)
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{
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array_destroy(this->algorithms);
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free(this);
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}
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/**
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* Described in header
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*/
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hash_algorithm_set_t *hash_algorithm_set_create()
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{
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private_hash_algorithm_set_t *this;
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INIT(this,
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.public = {
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.add = _add,
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.contains = _contains,
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.count = _count,
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.create_enumerator = _create_enumerator,
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.destroy = _destroy,
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},
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.algorithms = array_create(sizeof(hash_algorithm_t), 0),
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);
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return &this->public;
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}
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@@ -0,0 +1,76 @@
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/*
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* Copyright (C) 2015 Tobias Brunner
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* 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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/**
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* @defgroup hash_algorithm_set hash_algorithm_set
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* @{ @ingroup crypto
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*/
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#ifndef HASH_ALGORITHM_SET_H_
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#define HASH_ALGORITHM_SET_H_
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typedef struct hash_algorithm_set_t hash_algorithm_set_t;
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#include <library.h>
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#include <crypto/hashers/hasher.h>
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/**
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* A set of hash algorithms
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*/
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struct hash_algorithm_set_t {
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/**
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* Add the given algorithm to the set.
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*
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* @param alg hash algorithm
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*/
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void (*add)(hash_algorithm_set_t *this, hash_algorithm_t alg);
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/**
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* Check if the given algorithm is contained in the set.
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*
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* @param alg hash algorithm
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* @return TRUE if contained in set
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*/
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bool (*contains)(hash_algorithm_set_t *this, hash_algorithm_t alg);
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/**
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* Number of hash algorithms contained in the set.
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*
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* @return number of algorithms
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*/
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int (*count)(hash_algorithm_set_t *this);
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/**
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* Enumerate the algorithms contained in the set.
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*
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* @return enumerator over hash_algorithm_t (sorted by identifier)
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*/
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enumerator_t *(*create_enumerator)(hash_algorithm_set_t *this);
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/**
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* Destroy a hash_algorithm_set_t instance
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*/
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void (*destroy)(hash_algorithm_set_t *this);
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};
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/**
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* Create a set of hash algorithms.
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*
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* @return hash_algorithm_set_t instance
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*/
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hash_algorithm_set_t *hash_algorithm_set_create();
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#endif /** HASH_ALGORITHM_SET_H_ @}*/
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