LCOV - code coverage report
Current view: top level - dh - dh_lib.c (source / functions) Hit Total Coverage
Test: lcov_coverage_final.info Lines: 55 96 57.3 %
Date: 2014-08-02 Functions: 6 12 50.0 %
Branches: 25 52 48.1 %

           Branch data     Line data    Source code
       1                 :            : /* crypto/dh/dh_lib.c */
       2                 :            : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
       3                 :            :  * All rights reserved.
       4                 :            :  *
       5                 :            :  * This package is an SSL implementation written
       6                 :            :  * by Eric Young (eay@cryptsoft.com).
       7                 :            :  * The implementation was written so as to conform with Netscapes SSL.
       8                 :            :  * 
       9                 :            :  * This library is free for commercial and non-commercial use as long as
      10                 :            :  * the following conditions are aheared to.  The following conditions
      11                 :            :  * apply to all code found in this distribution, be it the RC4, RSA,
      12                 :            :  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
      13                 :            :  * included with this distribution is covered by the same copyright terms
      14                 :            :  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
      15                 :            :  * 
      16                 :            :  * Copyright remains Eric Young's, and as such any Copyright notices in
      17                 :            :  * the code are not to be removed.
      18                 :            :  * If this package is used in a product, Eric Young should be given attribution
      19                 :            :  * as the author of the parts of the library used.
      20                 :            :  * This can be in the form of a textual message at program startup or
      21                 :            :  * in documentation (online or textual) provided with the package.
      22                 :            :  * 
      23                 :            :  * Redistribution and use in source and binary forms, with or without
      24                 :            :  * modification, are permitted provided that the following conditions
      25                 :            :  * are met:
      26                 :            :  * 1. Redistributions of source code must retain the copyright
      27                 :            :  *    notice, this list of conditions and the following disclaimer.
      28                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      29                 :            :  *    notice, this list of conditions and the following disclaimer in the
      30                 :            :  *    documentation and/or other materials provided with the distribution.
      31                 :            :  * 3. All advertising materials mentioning features or use of this software
      32                 :            :  *    must display the following acknowledgement:
      33                 :            :  *    "This product includes cryptographic software written by
      34                 :            :  *     Eric Young (eay@cryptsoft.com)"
      35                 :            :  *    The word 'cryptographic' can be left out if the rouines from the library
      36                 :            :  *    being used are not cryptographic related :-).
      37                 :            :  * 4. If you include any Windows specific code (or a derivative thereof) from 
      38                 :            :  *    the apps directory (application code) you must include an acknowledgement:
      39                 :            :  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
      40                 :            :  * 
      41                 :            :  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
      42                 :            :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      43                 :            :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      44                 :            :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
      45                 :            :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      46                 :            :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      47                 :            :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      48                 :            :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      49                 :            :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      50                 :            :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      51                 :            :  * SUCH DAMAGE.
      52                 :            :  * 
      53                 :            :  * The licence and distribution terms for any publically available version or
      54                 :            :  * derivative of this code cannot be changed.  i.e. this code cannot simply be
      55                 :            :  * copied and put under another distribution licence
      56                 :            :  * [including the GNU Public Licence.]
      57                 :            :  */
      58                 :            : 
      59                 :            : #include <stdio.h>
      60                 :            : #include "cryptlib.h"
      61                 :            : #include <openssl/bn.h>
      62                 :            : #include <openssl/dh.h>
      63                 :            : #ifndef OPENSSL_NO_ENGINE
      64                 :            : #include <openssl/engine.h>
      65                 :            : #endif
      66                 :            : 
      67                 :            : const char DH_version[]="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
      68                 :            : 
      69                 :            : static const DH_METHOD *default_DH_method = NULL;
      70                 :            : 
      71                 :          0 : void DH_set_default_method(const DH_METHOD *meth)
      72                 :            :         {
      73                 :          0 :         default_DH_method = meth;
      74                 :          0 :         }
      75                 :            : 
      76                 :       2955 : const DH_METHOD *DH_get_default_method(void)
      77                 :            :         {
      78         [ +  + ]:       2955 :         if(!default_DH_method)
      79                 :        874 :                 default_DH_method = DH_OpenSSL();
      80                 :       2955 :         return default_DH_method;
      81                 :            :         }
      82                 :            : 
      83                 :          0 : int DH_set_method(DH *dh, const DH_METHOD *meth)
      84                 :            :         {
      85                 :            :         /* NB: The caller is specifically setting a method, so it's not up to us
      86                 :            :          * to deal with which ENGINE it comes from. */
      87                 :            :         const DH_METHOD *mtmp;
      88                 :          0 :         mtmp = dh->meth;
      89         [ #  # ]:          0 :         if (mtmp->finish) mtmp->finish(dh);
      90                 :            : #ifndef OPENSSL_NO_ENGINE
      91         [ #  # ]:          0 :         if (dh->engine)
      92                 :            :                 {
      93                 :          0 :                 ENGINE_finish(dh->engine);
      94                 :          0 :                 dh->engine = NULL;
      95                 :            :                 }
      96                 :            : #endif
      97                 :          0 :         dh->meth = meth;
      98         [ #  # ]:          0 :         if (meth->init) meth->init(dh);
      99                 :          0 :         return 1;
     100                 :            :         }
     101                 :            : 
     102                 :       2955 : DH *DH_new(void)
     103                 :            :         {
     104                 :       2955 :         return DH_new_method(NULL);
     105                 :            :         }
     106                 :            : 
     107                 :       2955 : DH *DH_new_method(ENGINE *engine)
     108                 :            :         {
     109                 :            :         DH *ret;
     110                 :            : 
     111                 :       2955 :         ret=(DH *)OPENSSL_malloc(sizeof(DH));
     112         [ -  + ]:       2955 :         if (ret == NULL)
     113                 :            :                 {
     114                 :          0 :                 DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE);
     115                 :          0 :                 return(NULL);
     116                 :            :                 }
     117                 :            : 
     118                 :       2955 :         ret->meth = DH_get_default_method();
     119                 :            : #ifndef OPENSSL_NO_ENGINE
     120         [ -  + ]:       2955 :         if (engine)
     121                 :            :                 {
     122         [ #  # ]:          0 :                 if (!ENGINE_init(engine))
     123                 :            :                         {
     124                 :          0 :                         DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
     125                 :          0 :                         OPENSSL_free(ret);
     126                 :          0 :                         return NULL;
     127                 :            :                         }
     128                 :          0 :                 ret->engine = engine;
     129                 :            :                 }
     130                 :            :         else
     131                 :       2955 :                 ret->engine = ENGINE_get_default_DH();
     132         [ -  + ]:       2955 :         if(ret->engine)
     133                 :            :                 {
     134                 :          0 :                 ret->meth = ENGINE_get_DH(ret->engine);
     135         [ #  # ]:          0 :                 if(!ret->meth)
     136                 :            :                         {
     137                 :          0 :                         DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB);
     138                 :          0 :                         ENGINE_finish(ret->engine);
     139                 :          0 :                         OPENSSL_free(ret);
     140                 :          0 :                         return NULL;
     141                 :            :                         }
     142                 :            :                 }
     143                 :            : #endif
     144                 :            : 
     145                 :       2955 :         ret->pad=0;
     146                 :       2955 :         ret->version=0;
     147                 :       2955 :         ret->p=NULL;
     148                 :       2955 :         ret->g=NULL;
     149                 :       2955 :         ret->length=0;
     150                 :       2955 :         ret->pub_key=NULL;
     151                 :       2955 :         ret->priv_key=NULL;
     152                 :       2955 :         ret->q=NULL;
     153                 :       2955 :         ret->j=NULL;
     154                 :       2955 :         ret->seed = NULL;
     155                 :       2955 :         ret->seedlen = 0;
     156                 :       2955 :         ret->counter = NULL;
     157                 :       2955 :         ret->method_mont_p=NULL;
     158                 :       2955 :         ret->references = 1;
     159                 :       2955 :         ret->flags=ret->meth->flags;
     160                 :       2955 :         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
     161 [ +  - ][ -  + ]:       2955 :         if ((ret->meth->init != NULL) && !ret->meth->init(ret))
     162                 :            :                 {
     163                 :            : #ifndef OPENSSL_NO_ENGINE
     164         [ #  # ]:          0 :                 if (ret->engine)
     165                 :          0 :                         ENGINE_finish(ret->engine);
     166                 :            : #endif
     167                 :          0 :                 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
     168                 :          0 :                 OPENSSL_free(ret);
     169                 :          0 :                 ret=NULL;
     170                 :            :                 }
     171                 :       2955 :         return(ret);
     172                 :            :         }
     173                 :            : 
     174                 :       2955 : void DH_free(DH *r)
     175                 :            :         {
     176                 :            :         int i;
     177         [ +  - ]:       2955 :         if(r == NULL) return;
     178                 :       2955 :         i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
     179                 :            : #ifdef REF_PRINT
     180                 :            :         REF_PRINT("DH",r);
     181                 :            : #endif
     182         [ +  - ]:       2955 :         if (i > 0) return;
     183                 :            : #ifdef REF_CHECK
     184                 :            :         if (i < 0)
     185                 :            :                 {
     186                 :            :                 fprintf(stderr,"DH_free, bad reference count\n");
     187                 :            :                 abort();
     188                 :            :         }
     189                 :            : #endif
     190                 :            : 
     191         [ +  - ]:       2955 :         if (r->meth->finish)
     192                 :       2955 :                 r->meth->finish(r);
     193                 :            : #ifndef OPENSSL_NO_ENGINE
     194         [ -  + ]:       2955 :         if (r->engine)
     195                 :          0 :                 ENGINE_finish(r->engine);
     196                 :            : #endif
     197                 :            : 
     198                 :       2955 :         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
     199                 :            : 
     200         [ +  - ]:       2955 :         if (r->p != NULL) BN_clear_free(r->p);
     201         [ +  - ]:       2955 :         if (r->g != NULL) BN_clear_free(r->g);
     202         [ +  + ]:       2955 :         if (r->q != NULL) BN_clear_free(r->q);
     203         [ -  + ]:       2955 :         if (r->j != NULL) BN_clear_free(r->j);
     204         [ -  + ]:       2955 :         if (r->seed) OPENSSL_free(r->seed);
     205         [ -  + ]:       2955 :         if (r->counter != NULL) BN_clear_free(r->counter);
     206         [ +  + ]:       2955 :         if (r->pub_key != NULL) BN_clear_free(r->pub_key);
     207         [ +  + ]:       2955 :         if (r->priv_key != NULL) BN_clear_free(r->priv_key);
     208                 :       2955 :         OPENSSL_free(r);
     209                 :            :         }
     210                 :            : 
     211                 :          0 : int DH_up_ref(DH *r)
     212                 :            :         {
     213                 :          0 :         int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);
     214                 :            : #ifdef REF_PRINT
     215                 :            :         REF_PRINT("DH",r);
     216                 :            : #endif
     217                 :            : #ifdef REF_CHECK
     218                 :            :         if (i < 2)
     219                 :            :                 {
     220                 :            :                 fprintf(stderr, "DH_up, bad reference count\n");
     221                 :            :                 abort();
     222                 :            :                 }
     223                 :            : #endif
     224                 :          0 :         return ((i > 1) ? 1 : 0);
     225                 :            :         }
     226                 :            : 
     227                 :          0 : int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
     228                 :            :              CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
     229                 :            :         {
     230                 :          0 :         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp,
     231                 :            :                                 new_func, dup_func, free_func);
     232                 :            :         }
     233                 :            : 
     234                 :          0 : int DH_set_ex_data(DH *d, int idx, void *arg)
     235                 :            :         {
     236                 :          0 :         return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
     237                 :            :         }
     238                 :            : 
     239                 :          0 : void *DH_get_ex_data(DH *d, int idx)
     240                 :            :         {
     241                 :          0 :         return(CRYPTO_get_ex_data(&d->ex_data,idx));
     242                 :            :         }
     243                 :            : 
     244                 :       2242 : int DH_size(const DH *dh)
     245                 :            :         {
     246                 :       2242 :         return(BN_num_bytes(dh->p));
     247                 :            :         }
     248                 :            : 
     249                 :       1135 : int DH_security_bits(const DH *dh)
     250                 :            :         {
     251                 :            :         int N;
     252         [ -  + ]:       1135 :         if (dh->q)
     253                 :          0 :                 N = BN_num_bits(dh->q);
     254         [ +  + ]:       1135 :         else if (dh->length)
     255                 :        143 :                 N = dh->length;
     256                 :            :         else
     257                 :            :                 N = -1;
     258                 :       1135 :         return BN_security_bits(BN_num_bits(dh->p), N);
     259                 :            :         }

Generated by: LCOV version 1.9