dll/win32/crypt32/proplist.c

   1 /*
   2  * Copyright 2004-2006 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(crypt);
  22
  23 struct _CONTEXT_PROPERTY_LIST
  24 {
  25     CRITICAL_SECTION cs;
  26     struct list      properties;
  27 };
  28
  29 typedef struct _CONTEXT_PROPERTY
  30 {
  31     DWORD       propID;
  32     DWORD       cbData;
  33     LPBYTE      pbData;
  34     struct list entry;
  35 } CONTEXT_PROPERTY;
  36
  37 CONTEXT_PROPERTY_LIST *ContextPropertyList_Create(void)
  38 {
  39     CONTEXT_PROPERTY_LIST *list = CryptMemAlloc(sizeof(CONTEXT_PROPERTY_LIST));
  40
  41     if (list)
  42     {
  43         InitializeCriticalSection(&list->cs);
  44         list->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PCONTEXT_PROPERTY_LIST->cs");
  45         list_init(&list->properties);
  46     }
  47     return list;
  48 }
  49
  50 void ContextPropertyList_Free(CONTEXT_PROPERTY_LIST *list)
  51 {
  52     CONTEXT_PROPERTY *prop, *next;
  53
  54     LIST_FOR_EACH_ENTRY_SAFE(prop, next, &list->properties, CONTEXT_PROPERTY,
  55      entry)
  56     {
  57         list_remove(&prop->entry);
  58         CryptMemFree(prop->pbData);
  59         CryptMemFree(prop);
  60     }
  61     list->cs.DebugInfo->Spare[0] = 0;
  62     DeleteCriticalSection(&list->cs);
  63     CryptMemFree(list);
  64 }
  65
  66 BOOL ContextPropertyList_FindProperty(CONTEXT_PROPERTY_LIST *list, DWORD id,
  67  PCRYPT_DATA_BLOB blob)
  68 {
  69     CONTEXT_PROPERTY *prop;
  70     BOOL ret = FALSE;
  71
  72     TRACE("(%p, %d, %p)\n", list, id, blob);
  73
  74     EnterCriticalSection(&list->cs);
  75     LIST_FOR_EACH_ENTRY(prop, &list->properties, CONTEXT_PROPERTY, entry)
  76     {
  77         if (prop->propID == id)
  78         {
  79             blob->cbData = prop->cbData;
  80             blob->pbData = prop->pbData;
  81             ret = TRUE;
  82             break;
  83         }
  84     }
  85     LeaveCriticalSection(&list->cs);
  86     return ret;
  87 }
  88
  89 BOOL ContextPropertyList_SetProperty(CONTEXT_PROPERTY_LIST *list, DWORD id,
  90  const BYTE *pbData, size_t cbData)
  91 {
  92     LPBYTE data;
  93     BOOL ret = FALSE;
  94
  95     if (cbData)
  96     {
  97         data = CryptMemAlloc(cbData);
  98         if (data)
  99             memcpy(data, pbData, cbData);
 100     }
 101     else
 102         data = NULL;
 103     if (!cbData || data)
 104     {
 105         CONTEXT_PROPERTY *prop;
 106         BOOL found = FALSE;
 107
 108         EnterCriticalSection(&list->cs);
 109         LIST_FOR_EACH_ENTRY(prop, &list->properties, CONTEXT_PROPERTY, entry)
 110         {
 111             if (prop->propID == id)
 112             {
 113                 found = TRUE;
 114                 break;
 115             }
 116         }
 117         if (found)
 118         {
 119             CryptMemFree(prop->pbData);
 120             prop->cbData = cbData;
 121             prop->pbData = data;
 122             ret = TRUE;
 123         }
 124         else
 125         {
 126             prop = CryptMemAlloc(sizeof(CONTEXT_PROPERTY));
 127             if (prop)
 128             {
 129                 prop->propID = id;
 130                 prop->cbData = cbData;
 131                 prop->pbData = data;
 132                 list_add_tail(&list->properties, &prop->entry);
 133                 ret = TRUE;
 134             }
 135             else
 136                 CryptMemFree(data);
 137         }
 138         LeaveCriticalSection(&list->cs);
 139     }
 140     return ret;
 141 }
 142
 143 void ContextPropertyList_RemoveProperty(CONTEXT_PROPERTY_LIST *list, DWORD id)
 144 {
 145     CONTEXT_PROPERTY *prop;
 146
 147     EnterCriticalSection(&list->cs);
 148     LIST_FOR_EACH_ENTRY(prop, &list->properties, CONTEXT_PROPERTY, entry)
 149     {
 150         if (prop->propID == id)
 151         {
 152             list_remove(&prop->entry);
 153             CryptMemFree(prop->pbData);
 154             CryptMemFree(prop);
 155             break;
 156         }
 157     }
 158     LeaveCriticalSection(&list->cs);
 159 }
 160
 161 /* Since the properties are stored in a list, this is a tad inefficient
 162  * (O(n^2)) since I have to find the previous position every time.
 163  */
 164 DWORD ContextPropertyList_EnumPropIDs(CONTEXT_PROPERTY_LIST *list, DWORD id)
 165 {
 166     DWORD ret;
 167
 168     EnterCriticalSection(&list->cs);
 169     if (id)
 170     {
 171         CONTEXT_PROPERTY *cursor = NULL, *prop;
 172
 173         LIST_FOR_EACH_ENTRY(prop, &list->properties, CONTEXT_PROPERTY, entry)
 174         {
 175             if (prop->propID == id)
 176             {
 177                 cursor = prop;
 178                 break;
 179             }
 180         }
 181         if (cursor)
 182         {
 183             if (cursor->entry.next != &list->properties)
 184                 ret = LIST_ENTRY(cursor->entry.next, CONTEXT_PROPERTY,
 185                  entry)->propID;
 186             else
 187                 ret = 0;
 188         }
 189         else
 190             ret = 0;
 191     }
 192     else if (!list_empty(&list->properties))
 193         ret = LIST_ENTRY(list->properties.next, CONTEXT_PROPERTY,
 194          entry)->propID;
 195     else
 196         ret = 0;
 197     LeaveCriticalSection(&list->cs);
 198     return ret;
 199 }
 200
 201 void ContextPropertyList_Copy(CONTEXT_PROPERTY_LIST *to, CONTEXT_PROPERTY_LIST *from)
 202 {
 203     CONTEXT_PROPERTY *prop;
 204
 205     EnterCriticalSection(&from->cs);
 206     LIST_FOR_EACH_ENTRY(prop, &from->properties, CONTEXT_PROPERTY, entry)
 207     {
 208         ContextPropertyList_SetProperty(to, prop->propID, prop->pbData,
 209          prop->cbData);
 210     }
 211     LeaveCriticalSection(&from->cs);
 212 }