src/libstrongswan/plugins/gcrypt/gcrypt_plugin.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include "gcrypt_plugin.h"
  17
  18 #include "gcrypt_hasher.h"
  19
  20 #include <library.h>
  21 #include <debug.h>
  22
  23 #include <errno.h>
  24 #include <gcrypt.h>
  25 #include <pthread.h>
  26
  27 typedef struct private_gcrypt_plugin_t private_gcrypt_plugin_t;
  28
  29 /**
  30  * private data of gcrypt_plugin
  31  */
  32 struct private_gcrypt_plugin_t {
  33
  34         /**
  35          * public functions
  36          */
  37         gcrypt_plugin_t public;
  38 };
  39
  40 /**
  41  * Thread callback implementations for pthread
  42  */
  43 GCRY_THREAD_OPTION_PTHREAD_IMPL;
  44
  45 /**
  46  * Implementation of gcrypt_plugin_t.destroy
  47  */
  48 static void destroy(private_gcrypt_plugin_t *this)
  49 {
  50         lib->crypto->remove_hasher(lib->crypto,
  51                                         (hasher_constructor_t)gcrypt_hasher_create);
  52         free(this);
  53 }
  54
  55 /*
  56  * see header file
  57  */
  58 plugin_t *plugin_create()
  59 {
  60         private_gcrypt_plugin_t *this;
  61
  62         gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
  63
  64         if (!gcry_check_version(GCRYPT_VERSION))
  65         {
  66                 DBG1("libgcrypt version mismatch");
  67                 return NULL;
  68         }
  69
  70         /* we currently do not use secure memory */
  71         gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
  72         gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
  73
  74         this = malloc_thing(private_gcrypt_plugin_t);
  75
  76         this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
  77
  78         /* hashers */
  79         lib->crypto->add_hasher(lib->crypto, HASH_SHA1,
  80                                         (hasher_constructor_t)gcrypt_hasher_create);
  81         lib->crypto->add_hasher(lib->crypto, HASH_MD2,
  82                                         (hasher_constructor_t)gcrypt_hasher_create);
  83         lib->crypto->add_hasher(lib->crypto, HASH_MD4,
  84                                         (hasher_constructor_t)gcrypt_hasher_create);
  85         lib->crypto->add_hasher(lib->crypto, HASH_MD5,
  86                                         (hasher_constructor_t)gcrypt_hasher_create);
  87         lib->crypto->add_hasher(lib->crypto, HASH_SHA256,
  88                                         (hasher_constructor_t)gcrypt_hasher_create);
  89         lib->crypto->add_hasher(lib->crypto, HASH_SHA384,
  90                                         (hasher_constructor_t)gcrypt_hasher_create);
  91         lib->crypto->add_hasher(lib->crypto, HASH_SHA512,
  92                                         (hasher_constructor_t)gcrypt_hasher_create);
  93
  94         return &this->public.plugin;
  95 }
  96