dll/win32/crypt32/context.c

   1 /*
   2  * Copyright 2006 Juan Lang
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "crypt32_private.h"
  20
  21 WINE_DEFAULT_DEBUG_CHANNEL(context);
  22
  23 context_t *Context_CreateDataContext(size_t contextSize, const context_vtbl_t *vtbl, WINECRYPT_CERTSTORE *store)
  24 {
  25     context_t *context;
  26
  27     context = CryptMemAlloc(sizeof(context_t) + contextSize);
  28     if (!context)
  29         return NULL;
  30
  31     context->properties = ContextPropertyList_Create();
  32     if (!context->properties)
  33     {
  34         CryptMemFree(context);
  35         return NULL;
  36     }
  37
  38     context->vtbl = vtbl;
  39     context->ref = 1;
  40     context->linked = NULL;
  41
  42     store->vtbl->addref(store);
  43     context->store = store;
  44
  45     TRACE("returning %p\n", context);
  46     return context;
  47 }
  48
  49 context_t *Context_CreateLinkContext(unsigned int contextSize, context_t *linked, WINECRYPT_CERTSTORE *store)
  50 {
  51     context_t *context;
  52
  53     TRACE("(%d, %p)\n", contextSize, linked);
  54
  55     context = CryptMemAlloc(sizeof(context_t) + contextSize);
  56     if (!context)
  57         return NULL;
  58
  59     memcpy(context_ptr(context), context_ptr(linked), contextSize);
  60     context->vtbl = linked->vtbl;
  61     context->ref = 1;
  62     context->linked = linked;
  63     context->properties = linked->properties;
  64     Context_AddRef(linked);
  65
  66     store->vtbl->addref(store);
  67     context->store = store;
  68
  69     TRACE("returning %p\n", context);
  70     return context;
  71 }
  72
  73 void Context_AddRef(context_t *context)
  74 {
  75     LONG ref = InterlockedIncrement(&context->ref);
  76
  77     TRACE("(%p) ref=%d\n", context, context->ref);
  78
  79     if(ref == 1) {
  80         /* This is the first external (non-store) reference. Increase store ref cnt. */
  81         context->store->vtbl->addref(context->store);
  82     }
  83 }
  84
  85 void Context_Free(context_t *context)
  86 {
  87     TRACE("(%p)\n", context);
  88
  89     assert(!context->ref);
  90
  91     if (!context->linked) {
  92         ContextPropertyList_Free(context->properties);
  93         context->vtbl->free(context);
  94     }else {
  95         Context_Release(context->linked);
  96     }
  97
  98     CryptMemFree(context);
  99 }
 100
 101 void Context_Release(context_t *context)
 102 {
 103     LONG ref = InterlockedDecrement(&context->ref);
 104
 105     TRACE("(%p) ref=%d\n", context, ref);
 106     assert(ref >= 0);
 107
 108     if (!ref) {
 109         WINECRYPT_CERTSTORE *store = context->store;
 110
 111         /* This is the last reference, but the context still may be in a store.
 112          * We release our store reference, but leave it up to store to free or keep the context. */
 113         store->vtbl->releaseContext(store, context);
 114         store->vtbl->release(store, 0);
 115     }
 116 }
 117
 118 void Context_CopyProperties(const void *to, const void *from)
 119 {
 120     CONTEXT_PROPERTY_LIST *toProperties, *fromProperties;
 121
 122     toProperties = context_from_ptr(to)->properties;
 123     fromProperties = context_from_ptr(from)->properties;
 124     assert(toProperties && fromProperties);
 125     ContextPropertyList_Copy(toProperties, fromProperties);
 126 }