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      1 /* Copyright (c) 2016, Google Inc.
      2  *
      3  * Permission to use, copy, modify, and/or distribute this software for any
      4  * purpose with or without fee is hereby granted, provided that the above
      5  * copyright notice and this permission notice appear in all copies.
      6  *
      7  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      8  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      9  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     10  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     11  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
     12  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
     13  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
     14 
     15 #include <openssl/obj.h>
     16 
     17 #include <assert.h>
     18 #include <string.h>
     19 
     20 #include <openssl/evp.h>
     21 
     22 #include "../../crypto/internal.h"
     23 
     24 
     25 struct wrapped_callback {
     26   void (*callback)(const OBJ_NAME *, void *arg);
     27   void *arg;
     28 };
     29 
     30 static void cipher_callback(const EVP_CIPHER *cipher, const char *name,
     31                             const char *unused, void *arg) {
     32   const struct wrapped_callback *wrapped = (struct wrapped_callback *)arg;
     33   OBJ_NAME obj_name;
     34 
     35   OPENSSL_memset(&obj_name, 0, sizeof(obj_name));
     36   obj_name.type = OBJ_NAME_TYPE_CIPHER_METH;
     37   obj_name.name = name;
     38   obj_name.data = (const char *)cipher;
     39 
     40   wrapped->callback(&obj_name, wrapped->arg);
     41 }
     42 
     43 static void md_callback(const EVP_MD *md, const char *name, const char *unused,
     44                         void *arg) {
     45   const struct wrapped_callback *wrapped = (struct wrapped_callback*) arg;
     46   OBJ_NAME obj_name;
     47 
     48   OPENSSL_memset(&obj_name, 0, sizeof(obj_name));
     49   obj_name.type = OBJ_NAME_TYPE_MD_METH;
     50   obj_name.name = name;
     51   obj_name.data = (const char *)md;
     52 
     53   wrapped->callback(&obj_name, wrapped->arg);
     54 }
     55 
     56 void OBJ_NAME_do_all_sorted(int type,
     57                             void (*callback)(const OBJ_NAME *, void *arg),
     58                             void *arg) {
     59   struct wrapped_callback wrapped;
     60   wrapped.callback = callback;
     61   wrapped.arg = arg;
     62 
     63   if (type == OBJ_NAME_TYPE_CIPHER_METH) {
     64     EVP_CIPHER_do_all_sorted(cipher_callback, &wrapped);
     65   } else if (type == OBJ_NAME_TYPE_MD_METH) {
     66     EVP_MD_do_all_sorted(md_callback, &wrapped);
     67   } else {
     68     assert(0);
     69   }
     70 }
     71 
     72 void OBJ_NAME_do_all(int type, void (*callback)(const OBJ_NAME *, void *arg),
     73                      void *arg) {
     74   OBJ_NAME_do_all_sorted(type, callback, arg);
     75 }
     76