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 #include "gcrypt_crypter.h"
  20 #include "gcrypt_rng.h"
  21 #include "gcrypt_dh.h"
  22 #include "gcrypt_rsa_private_key.h"
  23
  24 #include <library.h>
  25 #include <debug.h>
  26 #include <utils/mutex.h>
  27
  28 #include <errno.h>
  29 #include <gcrypt.h>
  30
  31 typedef struct private_gcrypt_plugin_t private_gcrypt_plugin_t;
  32
  33 /**
  34  * private data of gcrypt_plugin
  35  */
  36 struct private_gcrypt_plugin_t {
  37
  38         /**
  39          * public functions
  40          */
  41         gcrypt_plugin_t public;
  42 };
  43
  44 /**
  45  * gcrypt mutex initialization wrapper
  46  */
  47 static int mutex_init(void **lock)
  48 {
  49         *lock = mutex_create(MUTEX_DEFAULT);
  50         return 0;
  51 }
  52
  53 /**
  54  * gcrypt mutex cleanup wrapper
  55  */
  56 static int mutex_destroy(void **lock)
  57 {
  58         mutex_t *mutex = *lock;
  59
  60         mutex->destroy(mutex);
  61         return 0;
  62 }
  63
  64 /**
  65  * gcrypt mutex lock wrapper
  66  */
  67 static int mutex_lock(void **lock)
  68 {
  69         mutex_t *mutex = *lock;
  70
  71         mutex->lock(mutex);
  72         return 0;
  73 }
  74
  75 /**
  76  * gcrypt mutex unlock wrapper
  77  */
  78 static int mutex_unlock(void **lock)
  79 {
  80         mutex_t *mutex = *lock;
  81
  82         mutex->unlock(mutex);
  83         return 0;
  84 }
  85
  86 /**
  87  * gcrypt locking functions using our mutex_t
  88  */
  89 static struct gcry_thread_cbs thread_functions = {
  90         GCRY_THREAD_OPTION_USER, NULL,
  91         mutex_init, mutex_destroy, mutex_lock, mutex_unlock,
  92         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
  93 };
  94
  95 /**
  96  * Implementation of gcrypt_plugin_t.destroy
  97  */
  98 static void destroy(private_gcrypt_plugin_t *this)
  99 {
 100         lib->crypto->remove_hasher(lib->crypto,
 101                                         (hasher_constructor_t)gcrypt_hasher_create);
 102         lib->crypto->remove_crypter(lib->crypto,
 103                                         (crypter_constructor_t)gcrypt_crypter_create);
 104         lib->crypto->remove_rng(lib->crypto,
 105                                         (rng_constructor_t)gcrypt_rng_create);
 106         lib->crypto->remove_dh(lib->crypto,
 107                                         (dh_constructor_t)gcrypt_dh_create);
 108         lib->creds->remove_builder(lib->creds,
 109                                         (builder_constructor_t)gcrypt_rsa_private_key_builder);
 110         free(this);
 111 }
 112
 113 /*
 114  * see header file
 115  */
 116 plugin_t *plugin_create()
 117 {
 118         private_gcrypt_plugin_t *this;
 119
 120         gcry_control(GCRYCTL_SET_THREAD_CBS, &thread_functions);
 121
 122         if (!gcry_check_version(GCRYPT_VERSION))
 123         {
 124                 DBG1("libgcrypt version mismatch");
 125                 return NULL;
 126         }
 127
 128         /* we currently do not use secure memory */
 129         gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
 130         gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
 131
 132         this = malloc_thing(private_gcrypt_plugin_t);
 133
 134         this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
 135
 136         /* hashers */
 137         lib->crypto->add_hasher(lib->crypto, HASH_SHA1,
 138                                         (hasher_constructor_t)gcrypt_hasher_create);
 139         lib->crypto->add_hasher(lib->crypto, HASH_MD2,
 140                                         (hasher_constructor_t)gcrypt_hasher_create);
 141         lib->crypto->add_hasher(lib->crypto, HASH_MD4,
 142                                         (hasher_constructor_t)gcrypt_hasher_create);
 143         lib->crypto->add_hasher(lib->crypto, HASH_MD5,
 144                                         (hasher_constructor_t)gcrypt_hasher_create);
 145         lib->crypto->add_hasher(lib->crypto, HASH_SHA256,
 146                                         (hasher_constructor_t)gcrypt_hasher_create);
 147         lib->crypto->add_hasher(lib->crypto, HASH_SHA384,
 148                                         (hasher_constructor_t)gcrypt_hasher_create);
 149         lib->crypto->add_hasher(lib->crypto, HASH_SHA512,
 150                                         (hasher_constructor_t)gcrypt_hasher_create);
 151
 152         /* crypters */
 153         lib->crypto->add_crypter(lib->crypto, ENCR_3DES,
 154                                         (crypter_constructor_t)gcrypt_crypter_create);
 155         lib->crypto->add_crypter(lib->crypto, ENCR_IDEA,
 156                                         (crypter_constructor_t)gcrypt_crypter_create);
 157         lib->crypto->add_crypter(lib->crypto, ENCR_CAST,
 158                                         (crypter_constructor_t)gcrypt_crypter_create);
 159         lib->crypto->add_crypter(lib->crypto, ENCR_BLOWFISH,
 160                                         (crypter_constructor_t)gcrypt_crypter_create);
 161         lib->crypto->add_crypter(lib->crypto, ENCR_DES,
 162                                         (crypter_constructor_t)gcrypt_crypter_create);
 163         lib->crypto->add_crypter(lib->crypto, ENCR_DES_ECB,
 164                                         (crypter_constructor_t)gcrypt_crypter_create);
 165         lib->crypto->add_crypter(lib->crypto, ENCR_AES_CBC,
 166                                         (crypter_constructor_t)gcrypt_crypter_create);
 167         lib->crypto->add_crypter(lib->crypto, ENCR_CAMELLIA_CBC,
 168                                         (crypter_constructor_t)gcrypt_crypter_create);
 169         lib->crypto->add_crypter(lib->crypto, ENCR_SERPENT_CBC,
 170                                         (crypter_constructor_t)gcrypt_crypter_create);
 171         lib->crypto->add_crypter(lib->crypto, ENCR_TWOFISH_CBC,
 172                                         (crypter_constructor_t)gcrypt_crypter_create);
 173
 174         /* random numbers */
 175         lib->crypto->add_rng(lib->crypto, RNG_WEAK,
 176                                                  (rng_constructor_t)gcrypt_rng_create);
 177         lib->crypto->add_rng(lib->crypto, RNG_STRONG,
 178                                                  (rng_constructor_t)gcrypt_rng_create);
 179         lib->crypto->add_rng(lib->crypto, RNG_TRUE,
 180                                                  (rng_constructor_t)gcrypt_rng_create);
 181
 182         /* diffie hellman groups, using modp */
 183         lib->crypto->add_dh(lib->crypto, MODP_2048_BIT,
 184                                         (dh_constructor_t)gcrypt_dh_create);
 185         lib->crypto->add_dh(lib->crypto, MODP_1536_BIT,
 186                                         (dh_constructor_t)gcrypt_dh_create);
 187         lib->crypto->add_dh(lib->crypto, MODP_3072_BIT,
 188                                         (dh_constructor_t)gcrypt_dh_create);
 189         lib->crypto->add_dh(lib->crypto, MODP_4096_BIT,
 190                                         (dh_constructor_t)gcrypt_dh_create);
 191         lib->crypto->add_dh(lib->crypto, MODP_6144_BIT,
 192                                         (dh_constructor_t)gcrypt_dh_create);
 193         lib->crypto->add_dh(lib->crypto, MODP_8192_BIT,
 194                                         (dh_constructor_t)gcrypt_dh_create);
 195         lib->crypto->add_dh(lib->crypto, MODP_1024_BIT,
 196                                         (dh_constructor_t)gcrypt_dh_create);
 197         lib->crypto->add_dh(lib->crypto, MODP_768_BIT,
 198                                         (dh_constructor_t)gcrypt_dh_create);
 199
 200         /* RSA */
 201         lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
 202                                         (builder_constructor_t)gcrypt_rsa_private_key_builder);
 203
 204         return &this->public.plugin;
 205 }
 206