Adding OpenSSL HMAC pseudo random functions to openssl plugin
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@ -23,7 +23,8 @@ libstrongswan_openssl_la_SOURCES = \
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openssl_ec_public_key.c openssl_ec_public_key.h \
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openssl_x509.c openssl_x509.h \
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openssl_crl.c openssl_crl.h \
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openssl_rng.c openssl_rng.h
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openssl_rng.c openssl_rng.h \
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openssl_hmac_prf.c openssl_hmac_prf.h
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libstrongswan_openssl_la_LDFLAGS = -module -avoid-version
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libstrongswan_openssl_la_LIBADD = -lcrypto
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@ -0,0 +1,172 @@
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/*
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* Copyright (C) 2012 Aleksandr Grinberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <openssl/evp.h>
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#include <openssl/hmac.h>
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#include "openssl_hmac_prf.h"
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typedef struct private_openssl_hmac_prf_t private_openssl_hmac_prf_t;
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/**
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* Private data of openssl_hmac_prf_t
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*/
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struct private_openssl_hmac_prf_t {
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/**
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* Public part of this class.
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*/
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openssl_hmac_prf_t public;
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/**
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* Hasher to use
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*/
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const EVP_MD *hasher;
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/**
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* Current HMAC context
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*/
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HMAC_CTX hmac;
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/**
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* Key stored for reuse
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*/
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chunk_t key;
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};
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METHOD(prf_t, get_block_size, size_t,
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private_openssl_hmac_prf_t *this)
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{
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return EVP_MD_size(this->hasher);
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}
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METHOD(prf_t, get_key_size, size_t,
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private_openssl_hmac_prf_t *this)
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{
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/* for HMAC prfs, IKEv2 uses block size as key size */
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return EVP_MD_size(this->hasher);
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}
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/**
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* Resets HMAC context
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*/
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static void reset(private_openssl_hmac_prf_t *this)
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{
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HMAC_Init_ex(&this->hmac, this->key.ptr, this->key.len, this->hasher, NULL);
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}
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METHOD(prf_t, get_bytes, void,
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private_openssl_hmac_prf_t *this, chunk_t seed, u_int8_t *out)
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{
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if (out == NULL)
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{
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HMAC_Update(&this->hmac, seed.ptr, seed.len);
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}
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else
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{
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HMAC_Update(&this->hmac, seed.ptr, seed.len);
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HMAC_Final(&this->hmac, out, NULL);
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reset(this);
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}
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}
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METHOD(prf_t, allocate_bytes, void,
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private_openssl_hmac_prf_t *this, chunk_t seed, chunk_t *out)
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{
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if (out == NULL)
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{
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get_bytes(this, seed, NULL);
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}
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else
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{
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*out = chunk_alloc(EVP_MD_size(this->hasher));
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get_bytes(this, seed, out->ptr);
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}
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}
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METHOD(prf_t, set_key, void,
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private_openssl_hmac_prf_t *this, chunk_t key)
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{
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chunk_clear(&this->key);
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this->key = chunk_clone(key);
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reset(this);
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}
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METHOD(prf_t, destroy, void,
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private_openssl_hmac_prf_t *this)
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{
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HMAC_CTX_cleanup(&this->hmac);
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chunk_clear(&this->key);
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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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openssl_hmac_prf_t *openssl_hmac_prf_create(pseudo_random_function_t algo)
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{
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private_openssl_hmac_prf_t *this;
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INIT(this,
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.public = {
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.prf = {
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.get_bytes = _get_bytes,
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.allocate_bytes = _allocate_bytes,
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.get_block_size = _get_block_size,
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.get_key_size = _get_key_size,
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.set_key = _set_key,
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.destroy = _destroy,
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},
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},
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);
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switch (algo)
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{
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case PRF_HMAC_MD5:
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this->hasher = EVP_get_digestbyname("md5");
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break;
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case PRF_HMAC_SHA1:
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this->hasher = EVP_get_digestbyname("sha1");
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break;
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case PRF_HMAC_SHA2_256:
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this->hasher = EVP_get_digestbyname("sha256");
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break;
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case PRF_HMAC_SHA2_384:
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this->hasher = EVP_get_digestbyname("sha384");
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break;
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case PRF_HMAC_SHA2_512:
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this->hasher = EVP_get_digestbyname("sha512");
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break;
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default:
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break;
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}
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if (!this->hasher)
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{
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free(this);
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return NULL;
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}
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HMAC_CTX_init(&this->hmac);
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return &this->public;
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}
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@ -0,0 +1,54 @@
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/*
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* Copyright (C) 2012 Aleksandr Grinberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* @defgroup openssl_hmac_prf openssl_hmac_prf
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* @{ @ingroup openssl_p
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*/
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#ifndef OPENSSL_HMAC_PRF_H_
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#define OPENSSL_HMAC_PRF_H_
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typedef struct openssl_hmac_prf_t openssl_hmac_prf_t;
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#include <crypto/prfs/prf.h>
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/**
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* Implementation of pseudo random functions using OpenSSL.
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*/
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struct openssl_hmac_prf_t {
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/**
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* Implements prf_t interface.
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*/
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prf_t prf;
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};
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/**
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* Constructor to create openssl_hmac_prf_t.
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*
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* @param algo algorithm
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* @return openssl_hmac_prf_t, NULL if not supported
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*/
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openssl_hmac_prf_t *openssl_hmac_prf_create(pseudo_random_function_t algo);
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#endif /** OPENSSL_HMAC_PRF_H_ @}*/
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@ -41,6 +41,7 @@
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#include "openssl_x509.h"
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#include "openssl_crl.h"
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#include "openssl_rng.h"
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#include "openssl_hmac_prf.h"
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typedef struct private_openssl_plugin_t private_openssl_plugin_t;
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@ -261,6 +262,22 @@ METHOD(plugin_t, get_features, int,
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PLUGIN_REGISTER(PRF, openssl_sha1_prf_create),
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PLUGIN_PROVIDE(PRF, PRF_KEYED_SHA1),
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#endif
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#ifndef OPENSSL_NO_HMAC
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PLUGIN_REGISTER(PRF, openssl_hmac_prf_create),
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#ifndef OPENSSL_NO_MD5
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PLUGIN_PROVIDE(PRF, PRF_HMAC_MD5),
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#endif
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#ifndef OPENSSL_NO_SHA1
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PLUGIN_PROVIDE(PRF, PRF_HMAC_SHA1),
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#endif
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#ifndef OPENSSL_NO_SHA256
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PLUGIN_PROVIDE(PRF, PRF_HMAC_SHA2_256),
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#endif
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#ifndef OPENSSL_NO_SHA512
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PLUGIN_PROVIDE(PRF, PRF_HMAC_SHA2_384),
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PLUGIN_PROVIDE(PRF, PRF_HMAC_SHA2_512),
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#endif
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#endif /* OPENSSL_NO_HMAC */
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#ifndef OPENSSL_NO_DH
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/* MODP DH groups */
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PLUGIN_REGISTER(DH, openssl_diffie_hellman_create),
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