Adding OpenSSL HMAC signer functions to openssl plugin
This commit is contained in:
Aleksandr Grinberg
committed by
Tobias Brunner
Tobias Brunner
parent
0504b0a09f
commit
54081897cf
@@ -24,7 +24,8 @@ libstrongswan_openssl_la_SOURCES = \
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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_hmac_prf.c openssl_hmac_prf.h
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openssl_hmac_prf.c openssl_hmac_prf.h \
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openssl_hmac_signer.c openssl_hmac_signer.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 +1,246 @@
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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_signer.h"
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typedef struct private_openssl_hmac_signer_t private_openssl_hmac_signer_t;
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/**
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* Private data of openssl_hmac_signer_t
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*/
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struct private_openssl_hmac_signer_t {
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/**
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* Public part of this class.
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*/
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openssl_hmac_signer_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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* Signature truncation length
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*/
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size_t trunc;
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};
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METHOD(signer_t, get_block_size, size_t,
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private_openssl_hmac_signer_t *this)
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{
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return this->trunc;
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}
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METHOD(signer_t, get_key_size, size_t,
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private_openssl_hmac_signer_t *this)
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{
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return this->key.len;
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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_signer_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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static void get_bytes(private_openssl_hmac_signer_t *this, chunk_t seed,
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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(signer_t, get_signature, void,
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private_openssl_hmac_signer_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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get_bytes(this, seed, NULL);
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}
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else
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{
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u_int8_t mac[this->key.len];
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get_bytes(this, seed, mac);
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memcpy(out, mac, this->trunc);
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}
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}
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METHOD(signer_t, allocate_signature,void,
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private_openssl_hmac_signer_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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u_int8_t mac[this->key.len];
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get_bytes(this, seed, mac);
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*out = chunk_alloc(this->trunc);
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memcpy(out->ptr, mac, this->trunc);
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}
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}
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METHOD(signer_t, verify_signature, bool,
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private_openssl_hmac_signer_t *this, chunk_t seed, chunk_t signature)
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{
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u_int8_t mac[this->key.len];
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get_bytes(this, seed, mac);
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if (signature.len != this->trunc)
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{
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return FALSE;
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}
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return memeq(signature.ptr, mac, this->trunc);
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}
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METHOD(signer_t, set_key, void,
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private_openssl_hmac_signer_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(signer_t, destroy, void,
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private_openssl_hmac_signer_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_signer_t *openssl_hmac_signer_create(integrity_algorithm_t algo)
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{
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private_openssl_hmac_signer_t *this;
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INIT(this,
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.public = {
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.signer = {
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.get_signature = _get_signature,
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.allocate_signature = _allocate_signature,
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.verify_signature = _verify_signature,
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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 AUTH_HMAC_MD5_96:
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this->hasher = EVP_get_digestbyname("md5");
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this->key.len = 16;
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this->trunc = 12;
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break;
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case AUTH_HMAC_MD5_128:
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this->hasher = EVP_get_digestbyname("md5");
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this->key.len = 16;
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this->trunc = 16;
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break;
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case AUTH_HMAC_SHA1_96:
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this->hasher = EVP_get_digestbyname("sha1");
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this->key.len = 20;
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this->trunc = 12;
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break;
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case AUTH_HMAC_SHA1_128:
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this->hasher = EVP_get_digestbyname("sha1");
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this->key.len = 20;
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this->trunc = 16;
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break;
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case AUTH_HMAC_SHA1_160:
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this->hasher = EVP_get_digestbyname("sha1");
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this->key.len = 20;
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this->trunc = 20;
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break;
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case AUTH_HMAC_SHA2_256_128:
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this->hasher = EVP_get_digestbyname("sha256");
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this->key.len = 32;
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this->trunc = 16;
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break;
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case AUTH_HMAC_SHA2_256_256:
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this->hasher = EVP_get_digestbyname("sha256");
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this->key.len = 32;
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this->trunc = 32;
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break;
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case AUTH_HMAC_SHA2_384_192:
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this->hasher = EVP_get_digestbyname("sha384");
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this->key.len = 48;
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this->trunc = 24;
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break;
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case AUTH_HMAC_SHA2_384_384:
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this->hasher = EVP_get_digestbyname("sha384");
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this->key.len = 48;
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this->trunc = 48;
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break;
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case AUTH_HMAC_SHA2_512_256:
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this->hasher = EVP_get_digestbyname("sha512");
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this->key.len = 64;
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this->trunc = 32;
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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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/* hash is not available */
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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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* 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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* 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_signer openssl_hmac_signer
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* @{ @ingroup openssl_p
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*/
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#ifndef OPENSSL_HMAC_SIGNER_H_
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#define OPENSSL_HMAC_SIGNER_H_
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typedef struct openssl_hmac_signer_t openssl_hmac_signer_t;
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#include <crypto/signers/signer.h>
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/**
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* Implementation of HMAC signature functions using OpenSSL.
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*/
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struct openssl_hmac_signer_t {
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/**
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* Implements signer_t interface.
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*/
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signer_t signer;
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};
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/**
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* Constructor to create openssl_hmac_signer_t.
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*
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* @param algo algorithm
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* @return openssl_hmac_signer_t, NULL if not supported
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*/
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openssl_hmac_signer_t *openssl_hmac_signer_create(integrity_algorithm_t algo);
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#endif /** OPENSSL_HMAC_SIGNER_H_ @}*/
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@@ -42,6 +42,7 @@
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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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#include "openssl_hmac_signer.h"
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typedef struct private_openssl_plugin_t private_openssl_plugin_t;
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@@ -276,6 +277,25 @@ METHOD(plugin_t, get_features, int,
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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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PLUGIN_REGISTER(SIGNER, openssl_hmac_signer_create),
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#ifndef OPENSSL_NO_MD5
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_MD5_96),
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_MD5_128),
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#endif
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#ifndef OPENSSL_NO_SHA1
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA1_96),
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA1_128),
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA1_160),
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#endif
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#ifndef OPENSSL_NO_SHA256
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA2_256_128),
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA2_256_256),
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#endif
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#ifndef OPENSSL_NO_SHA512
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA2_384_192),
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA2_384_384),
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PLUGIN_PROVIDE(SIGNER, AUTH_HMAC_SHA2_512_256),
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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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