Implement NtAccessCheck.

[wine/gsoc-2012-control.git] / dlls / advapi32 / crypt.c

/*
 * Copyright 1999 Ian Schmidt
 * Copyright 2001 Travis Michielsen
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/***********************************************************************
 *
 *  TODO:
 *  - Reference counting
 *  - Thread-safing
 */

#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "crypt.h"
#include "winnls.h"
#include "winreg.h"
#include "wine/debug.h"
#include "winternl.h"
#include "ntstatus.h"

WINE_DEFAULT_DEBUG_CHANNEL(crypt);

HWND crypt_hWindow = 0;

#define CRYPT_ReturnLastError(err) {SetLastError(err); return FALSE;}

#define CRYPT_Alloc(size) ((LPVOID)LocalAlloc(LMEM_ZEROINIT, size))
#define CRYPT_Free(buffer) (LocalFree((HLOCAL)buffer))

static inline PSTR CRYPT_GetProvKeyName(PCSTR pProvName)
{
        PCSTR KEYSTR = "Software\\Microsoft\\Cryptography\\Defaults\\Provider\\";
        PSTR keyname;

        keyname = CRYPT_Alloc(strlen(KEYSTR) + strlen(pProvName) +1);
        if (keyname)
        {
                strcpy(keyname, KEYSTR);
                strcpy(keyname + strlen(KEYSTR), pProvName);
        } else
                SetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return keyname;
}

static inline PSTR CRYPT_GetTypeKeyName(DWORD dwType, BOOL user)
{
        PCSTR MACHINESTR = "Software\\Microsoft\\Cryptography\\Defaults\\Provider Types\\Type XXX";
        PCSTR USERSTR = "Software\\Microsoft\\Cryptography\\Provider Type XXX";
        PSTR keyname;
        PSTR ptr;

        keyname = CRYPT_Alloc( (user ? strlen(USERSTR) : strlen(MACHINESTR)) +1);
        if (keyname)
        {
                user ? strcpy(keyname, USERSTR) : strcpy(keyname, MACHINESTR);
                ptr = keyname + strlen(keyname);
                *(--ptr) = (dwType % 10) + '0';
                *(--ptr) = ((dwType / 10) % 10) + '0';
                *(--ptr) = (dwType / 100) + '0';
        } else
                SetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return keyname;
}

/* CRYPT_UnicodeTOANSI
 * wstr - unicode string
 * str - pointer to ANSI string
 * strsize - size of buffer pointed to by str or -1 if we have to do the allocation
 *
 * returns TRUE if unsuccessfull, FALSE otherwise.
 * if wstr is NULL, returns TRUE and sets str to NULL! Value of str should be checked after call
 */
static inline BOOL CRYPT_UnicodeToANSI(LPCWSTR wstr, LPSTR* str, int strsize)
{
        int count;

        if (!wstr)
        {
                *str = NULL;
                return TRUE;
        }
        count = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);
        if (strsize == -1)
                *str = CRYPT_Alloc(count * sizeof(CHAR));
        else
                count = min( count, strsize );
        if (*str)
        {
                WideCharToMultiByte(CP_ACP, 0, wstr, -1, *str, count, NULL, NULL);
                return TRUE;
        }
        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return FALSE;
}

/* CRYPT_ANSITOUnicode
 * str - ANSI string
 * wstr - pointer to unicode string
 * wstrsize - size of buffer pointed to by wstr or -1 if we have to do the allocation
 */
static inline BOOL CRYPT_ANSIToUnicode(LPCSTR str, LPWSTR* wstr, int wstrsize)
{
        int wcount;

        if (!str)
        {
                *wstr = NULL;
                return TRUE;
        }
        wcount = MultiByteToWideChar(CP_ACP, 0, str, -1, NULL, 0);
        if (wstrsize == -1)
                *wstr = CRYPT_Alloc(wcount * sizeof(WCHAR));
        else
                wcount = min( wcount, wstrsize/sizeof(WCHAR) );
        if (*wstr)
        {
                MultiByteToWideChar(CP_ACP, 0, str, -1, *wstr, wcount);
                return TRUE;
        }
        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return FALSE;
}

/* These next 2 functions are used by the VTableProvStruc structure */
static BOOL CALLBACK CRYPT_VerifyImage(LPCSTR lpszImage, BYTE* pData)
{
        if (!lpszImage || !pData)
        {
                SetLastError(ERROR_INVALID_PARAMETER);
                return FALSE;
        }

        FIXME("(%s, %p): not verifying image\n", lpszImage, pData);

        return TRUE;
}

static BOOL CALLBACK CRYPT_ReturnhWnd(HWND *phWnd)
{
        if (!phWnd)
                return FALSE;
        *phWnd = crypt_hWindow;
        return TRUE;
}

#define CRYPT_GetProvFunc(name) \
        if ( !(provider->pFuncs->p##name = (void*)GetProcAddress(provider->hModule, #name)) ) goto error
#define CRYPT_GetProvFuncOpt(name) \
        provider->pFuncs->p##name = (void*)GetProcAddress(provider->hModule, #name)
PCRYPTPROV CRYPT_LoadProvider(PSTR pImage)
{
        PCRYPTPROV provider;
        DWORD errorcode = ERROR_NOT_ENOUGH_MEMORY;

        if ( !(provider = CRYPT_Alloc(sizeof(CRYPTPROV))) ) goto error;
        if ( !(provider->pFuncs = CRYPT_Alloc(sizeof(PROVFUNCS))) ) goto error;
        if ( !(provider->pVTable = CRYPT_Alloc(sizeof(VTableProvStruc))) ) goto error;
        if ( !(provider->hModule = LoadLibraryA(pImage)) )
        {
                errorcode = (GetLastError() == ERROR_FILE_NOT_FOUND) ? NTE_PROV_DLL_NOT_FOUND : NTE_PROVIDER_DLL_FAIL;
                FIXME("Failed to load dll %s\n", debugstr_a(pImage));
                goto error;
        }
        provider->dwMagic = MAGIC_CRYPTPROV;
        provider->refcount = 1;

        errorcode = NTE_PROVIDER_DLL_FAIL;
        CRYPT_GetProvFunc(CPAcquireContext);
        CRYPT_GetProvFunc(CPCreateHash);
        CRYPT_GetProvFunc(CPDecrypt);
        CRYPT_GetProvFunc(CPDeriveKey);
        CRYPT_GetProvFunc(CPDestroyHash);
        CRYPT_GetProvFunc(CPDestroyKey);
        CRYPT_GetProvFuncOpt(CPDuplicateHash);
        CRYPT_GetProvFuncOpt(CPDuplicateKey);
        CRYPT_GetProvFunc(CPEncrypt);
        CRYPT_GetProvFunc(CPExportKey);
        CRYPT_GetProvFunc(CPGenKey);
        CRYPT_GetProvFunc(CPGenRandom);
        CRYPT_GetProvFunc(CPGetHashParam);
        CRYPT_GetProvFunc(CPGetKeyParam);
        CRYPT_GetProvFunc(CPGetProvParam);
        CRYPT_GetProvFunc(CPGetUserKey);
        CRYPT_GetProvFunc(CPHashData);
        CRYPT_GetProvFunc(CPHashSessionKey);
        CRYPT_GetProvFunc(CPImportKey);
        CRYPT_GetProvFunc(CPReleaseContext);
        CRYPT_GetProvFunc(CPSetHashParam);
        CRYPT_GetProvFunc(CPSetKeyParam);
        CRYPT_GetProvFunc(CPSetProvParam);
        CRYPT_GetProvFunc(CPSignHash);
        CRYPT_GetProvFunc(CPVerifySignature);

        /* FIXME: Not sure what the pbContextInfo field is for.
         *        Does it need memory allocation?
         */
        provider->pVTable->Version = 3;
        provider->pVTable->pFuncVerifyImage = (FARPROC)CRYPT_VerifyImage;
        provider->pVTable->pFuncReturnhWnd = (FARPROC)CRYPT_ReturnhWnd;
        provider->pVTable->dwProvType = 0;
        provider->pVTable->pbContextInfo = NULL;
        provider->pVTable->cbContextInfo = 0;
        provider->pVTable->pszProvName = NULL;
        return provider;

error:
        SetLastError(errorcode);
        if (provider)
        {
                provider->dwMagic = 0;
                if (provider->hModule)
                        FreeLibrary(provider->hModule);
                CRYPT_Free(provider->pVTable);
                CRYPT_Free(provider->pFuncs);
                CRYPT_Free(provider);
        }
        return NULL;
}
#undef CRYPT_GetProvFunc
#undef CRYPT_GetProvFuncOpt


/******************************************************************************
 * CryptAcquireContextA (ADVAPI32.@)
 * Acquire a crypto provider context handle.
 *
 * PARAMS
 * phProv: Pointer to HCRYPTPROV for the output.
 * pszContainer: Key Container Name
 * pszProvider: Cryptographic Service Provider Name
 * dwProvType: Crypto provider type to get a handle.
 * dwFlags: flags for the operation
 *
 * RETURNS TRUE on success, FALSE on failure.
 */
BOOL WINAPI CryptAcquireContextA (HCRYPTPROV *phProv, LPCSTR pszContainer,
                LPCSTR pszProvider, DWORD dwProvType, DWORD dwFlags)
{
        PCRYPTPROV pProv = NULL;
        HKEY key;
        PSTR imagepath = NULL, keyname = NULL, provname = NULL, temp = NULL;
        DWORD keytype, type, len;
        ULONG r;

        TRACE("(%p, %s, %s, %ld, %08lx)\n", phProv, pszContainer,
                pszProvider, dwProvType, dwFlags);

        if (dwProvType < 1 || dwProvType > MAXPROVTYPES)
        {
                SetLastError(NTE_BAD_PROV_TYPE);
                return FALSE;
        }
        
        if (!phProv)
        {
                SetLastError(ERROR_INVALID_PARAMETER);
                return FALSE;
        }

        if (!pszProvider || !*pszProvider)
        {
                /* No CSP name specified so try the user default CSP first
                 * then try the machine default CSP
                 */
                if ( !(keyname = CRYPT_GetTypeKeyName(dwProvType, TRUE)) ) {
                        TRACE("No provider registered for crypto provider type %ld.\n", dwProvType);
                        SetLastError(NTE_PROV_TYPE_NOT_DEF);
                        return FALSE;
                }
                if (RegOpenKeyA(HKEY_CURRENT_USER, keyname, &key))
                {
                        CRYPT_Free(keyname);
                        if ( !(keyname = CRYPT_GetTypeKeyName(dwProvType, FALSE)) ) {
                                TRACE("No type registered for crypto provider type %ld.\n", dwProvType);
                                RegCloseKey(key);
                                SetLastError(NTE_PROV_TYPE_NOT_DEF);
                                goto error;
                        }
                        if (RegOpenKeyA(HKEY_LOCAL_MACHINE, keyname, &key)) {
                                TRACE("Did not find registry entry of crypto provider for %s.\n", debugstr_a(keyname));
                                CRYPT_Free(keyname);
                                RegCloseKey(key);
                                SetLastError(NTE_PROV_TYPE_NOT_DEF);
                                goto error;
                        }
                }
                CRYPT_Free(keyname);
                r = RegQueryValueExA(key, "Name", NULL, &keytype, NULL, &len);
                if( r != ERROR_SUCCESS || !len || keytype != REG_SZ)
                {
                        TRACE("error %ld reading size of 'Name' from registry\n", r );
                        RegCloseKey(key);
                        SetLastError(NTE_PROV_TYPE_ENTRY_BAD);
                        goto error;
                }
                if(!(provname = CRYPT_Alloc(len)))
                {
                        RegCloseKey(key);
                        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
                        goto error;
                }
                r = RegQueryValueExA(key, "Name", NULL, NULL, provname, &len);
                if( r != ERROR_SUCCESS )
                {
                        TRACE("error %ld reading 'Name' from registry\n", r );
                        RegCloseKey(key);
                        SetLastError(NTE_PROV_TYPE_ENTRY_BAD);
                        goto error;
                }
                RegCloseKey(key);
        } else {
                if ( !(provname = CRYPT_Alloc(strlen(pszProvider) +1)) )
                {
                        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
                        goto error;
                }
                strcpy(provname, pszProvider);
        }

        keyname = CRYPT_GetProvKeyName(provname);
        r = RegOpenKeyA(HKEY_LOCAL_MACHINE, keyname, &key);
        CRYPT_Free(keyname);
        if (r != ERROR_SUCCESS)
        {
                SetLastError(NTE_KEYSET_NOT_DEF);
                goto error;
        }
        len = sizeof(DWORD);
        r = RegQueryValueExA(key, "Type", NULL, NULL, (BYTE*)&type, &len);
        if (r != ERROR_SUCCESS)
        {
                SetLastError(NTE_PROV_TYPE_ENTRY_BAD);
                goto error;
        }
        if (type != dwProvType)
        {
                TRACE("Crypto provider has wrong type (%ld vs expected %ld).\n", type, dwProvType);
                SetLastError(NTE_PROV_TYPE_NO_MATCH);
                goto error;
        }

        r = RegQueryValueExA(key, "Image Path", NULL, &keytype, NULL, &len);
        if ( r != ERROR_SUCCESS || keytype != REG_SZ)
        {
                TRACE("error %ld reading size of 'Image Path' from registry\n", r );
                RegCloseKey(key);
                SetLastError(NTE_PROV_TYPE_ENTRY_BAD);
                goto error;
        }
        if (!(temp = CRYPT_Alloc(len)))
        {
                RegCloseKey(key);
                SetLastError(ERROR_NOT_ENOUGH_MEMORY);
                goto error;
        }
        r = RegQueryValueExA(key, "Image Path", NULL, NULL, temp, &len);
        if( r != ERROR_SUCCESS )
        {
                TRACE("error %ld reading 'Image Path' from registry\n", r );
                RegCloseKey(key);
                SetLastError(NTE_PROV_TYPE_ENTRY_BAD);
                goto error;
        }
        RegCloseKey(key);
        len = ExpandEnvironmentStringsA(temp, NULL, 0);
        if ( !(imagepath = CRYPT_Alloc(len)) )
        {
                SetLastError(ERROR_NOT_ENOUGH_MEMORY);
                goto error;
        }
        if (!ExpandEnvironmentStringsA(temp, imagepath, len))
        {
                /* ExpandEnvironmentStrings will call SetLastError */
                goto error;
        }
        pProv = CRYPT_LoadProvider(imagepath);
        if (!pProv) {
                /* CRYPT_LoadProvider calls SetLastError */
                goto error;
        }
        pProv->pVTable->dwProvType = dwProvType;
        pProv->pVTable->pszProvName = provname;
        if (pProv->pFuncs->pCPAcquireContext(&pProv->hPrivate, (CHAR*)pszContainer, dwFlags, pProv->pVTable))
        {
                /* MSDN: When this flag is set, the value returned in phProv is undefined,
                 *       and thus, the CryptReleaseContext function need not be called afterwards.
                 *       Therefore, we must clean up everything now.
                 */
                if (dwFlags & CRYPT_DELETEKEYSET)
                {
                        pProv->dwMagic = 0;
                        FreeLibrary(pProv->hModule);
                        CRYPT_Free(provname);
                        CRYPT_Free(pProv->pFuncs);
                        CRYPT_Free(pProv);
                } else {
                        *phProv = (HCRYPTPROV)pProv;
                }
                CRYPT_Free(temp);
                CRYPT_Free(imagepath);
                return TRUE;
        }
        /* FALLTHROUGH TO ERROR IF FALSE - CSP internal error! */
error:
        if (pProv)
        {
                pProv->dwMagic = 0;
                if (pProv->hModule)
                        FreeLibrary(pProv->hModule);
                if (pProv->pVTable)
                        CRYPT_Free(pProv->pVTable);
                if (pProv->pFuncs)
                        CRYPT_Free(pProv->pFuncs);
                CRYPT_Free(pProv);
        }
        if (provname)
                CRYPT_Free(provname);
        if (temp)
                CRYPT_Free(temp);
        if (imagepath)
                CRYPT_Free(imagepath);
        return FALSE;
}

/******************************************************************************
 * CryptAcquireContextW (ADVAPI32.@)
 *
 * see CryptAcquireContextA
 */
BOOL WINAPI CryptAcquireContextW (HCRYPTPROV *phProv, LPCWSTR pszContainer,
                LPCWSTR pszProvider, DWORD dwProvType, DWORD dwFlags)
{
        PSTR pProvider = NULL, pContainer = NULL;
        BOOL ret = FALSE;

        TRACE("(%p, %s, %s, %ld, %08lx)\n", phProv, debugstr_w(pszContainer),
                debugstr_w(pszProvider), dwProvType, dwFlags);

        if ( !CRYPT_UnicodeToANSI(pszContainer, &pContainer, -1) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        if ( !CRYPT_UnicodeToANSI(pszProvider, &pProvider, -1) )
        {
                CRYPT_Free(pContainer);
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        }

        ret = CryptAcquireContextA(phProv, pContainer, pProvider, dwProvType, dwFlags);

        if (pContainer)
                CRYPT_Free(pContainer);
        if (pProvider)
                CRYPT_Free(pProvider);

        return ret;
}

/******************************************************************************
 * CryptContextAddRef (ADVAPI32.@)
 *
 * Increases reference count of a cryptographic service provider handle
 * by one.
 *
 * PARAMS
 *  hProv       [I] Handle to the CSP whose reference is being incremented.
 *  pdwReserved [IN] Reserved for future use and must be NULL.
 *  dwFlags     [I] Reserved for future use and must be NULL.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptContextAddRef (HCRYPTPROV hProv, DWORD *pdwReserved, DWORD dwFlags)
{
        PCRYPTPROV pProv = (PCRYPTPROV)hProv;   

        TRACE("(0x%lx, %p, %08lx)\n", hProv, pdwReserved, dwFlags);

        if (!pProv)
        {
                SetLastError(NTE_BAD_UID);
                return FALSE;
        }

        if (pProv->dwMagic != MAGIC_CRYPTPROV)
        {
                SetLastError(ERROR_INVALID_PARAMETER);
                return FALSE;
        }

        pProv->refcount++;
        return TRUE;
}

/******************************************************************************
 * CryptReleaseContext (ADVAPI32.@)
 *
 * Releases the handle of a CSP.  Reference count is decreased.
 *
 * PARAMS
 *  hProv   [I] Handle of a CSP.
 *  dwFlags [I] Reserved for future use and must be NULL.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptReleaseContext (HCRYPTPROV hProv, DWORD dwFlags)
{
        PCRYPTPROV pProv = (PCRYPTPROV)hProv;
        BOOL ret = TRUE;

        TRACE("(0x%lx, %08ld)\n", hProv, dwFlags);

        if (!pProv)
        {
                SetLastError(NTE_BAD_UID);
                return FALSE;
        }

        if (pProv->dwMagic != MAGIC_CRYPTPROV)
        {
                SetLastError(ERROR_INVALID_PARAMETER);
                return FALSE;
        }

        pProv->refcount--;
        if (pProv->refcount <= 0) 
        {
                ret = pProv->pFuncs->pCPReleaseContext(pProv->hPrivate, dwFlags);
                pProv->dwMagic = 0;
                FreeLibrary(pProv->hModule);
#if 0
                CRYPT_Free(pProv->pVTable->pContextInfo);
#endif
                CRYPT_Free(pProv->pVTable->pszProvName);
                CRYPT_Free(pProv->pVTable);
                CRYPT_Free(pProv->pFuncs);
                CRYPT_Free(pProv);
        }
        return ret;
}

/******************************************************************************
 * CryptGenRandom (ADVAPI32.@)
 *
 * Fills a buffer with cryptographically random bytes.
 *
 * PARAMS
 *  hProv    [I] Handle of a CSP.
 *  dwLen    [I] Number of bytes to generate.
 *  pbBuffer [I/O] Buffer to contain random bytes.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  pdBuffer must be at least dwLen bytes long.
 */
BOOL WINAPI CryptGenRandom (HCRYPTPROV hProv, DWORD dwLen, BYTE *pbBuffer)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;

        TRACE("(0x%lx, %ld, %p)\n", hProv, dwLen, pbBuffer);

        if (!hProv)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);

        if (prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        return prov->pFuncs->pCPGenRandom(prov->hPrivate, dwLen, pbBuffer);
}

/******************************************************************************
 * CryptCreateHash (ADVAPI32.@)
 *
 * Initiates the hashing of a stream of data.
 *
 * PARAMS
 *  hProv   [I] Handle of a CSP.
 *  Algid   [I] Identifies the hash algorithm to use.
 *  hKey    [I] Key for the hash (if required).
 *  dwFlags [I] Reserved for future use and must be NULL.
 *  phHash  [O] Address of the future handle to the new hash object.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  If the algorithm is a keyed hash, hKey is the key.
 */
BOOL WINAPI CryptCreateHash (HCRYPTPROV hProv, ALG_ID Algid, HCRYPTKEY hKey,
                DWORD dwFlags, HCRYPTHASH *phHash)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;
        PCRYPTKEY key = (PCRYPTKEY)hKey;
        PCRYPTHASH hash;

        TRACE("(0x%lx, 0x%x, 0x%lx, %08lx, %p)\n", hProv, Algid, hKey, dwFlags, phHash);

        if (!prov)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!phHash || prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if (dwFlags)
                CRYPT_ReturnLastError(NTE_BAD_FLAGS);
        if ( !(hash = CRYPT_Alloc(sizeof(CRYPTHASH))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        hash->pProvider = prov;

        if (prov->pFuncs->pCPCreateHash(prov->hPrivate, Algid,
                        key ? key->hPrivate : 0, 0, &hash->hPrivate))
        {
            *phHash = (HCRYPTHASH)hash;
            return TRUE;
        }

        /* CSP error! */
        CRYPT_Free(hash);
        *phHash = 0;
        return FALSE;
}

/******************************************************************************
 * CryptDecrypt (ADVAPI32.@)
 *
 * Decrypts data encrypted by CryptEncrypt.
 *
 * PARAMS
 *  hKey       [I] Handle to the decryption key.
 *  hHash      [I] Handle to a hash object.
 *  Final      [I] TRUE if this is the last section to be decrypted.
 *  dwFlags    [I] Reserved for future use. Can be CRYPT_OAEP.
 *  pbData     [I/O] Buffer that holds the encrypted data. Holds decrypted
 *                   data on return
 *  pdwDataLen [I/O] Length of pbData before and after the call.
 *
 *  RETURNS
 *   Success: TRUE
 *   Failure: FALSE
 */
BOOL WINAPI CryptDecrypt (HCRYPTKEY hKey, HCRYPTHASH hHash, BOOL Final,
                DWORD dwFlags, BYTE *pbData, DWORD *pdwDataLen)
{
        PCRYPTPROV prov;
        PCRYPTKEY key = (PCRYPTKEY)hKey;
        PCRYPTHASH hash = (PCRYPTHASH)hHash;

        TRACE("(0x%lx, 0x%lx, %d, %08lx, %p, %p)\n", hKey, hHash, Final, dwFlags, pbData, pdwDataLen);

        if (!key || !pbData || !pdwDataLen || !key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = key->pProvider;
        return prov->pFuncs->pCPDecrypt(prov->hPrivate, key->hPrivate, hash ? hash->hPrivate : 0,
                        Final, dwFlags, pbData, pdwDataLen);
}

/******************************************************************************
 * CryptDeriveKey (ADVAPI32.@)
 *
 * Generates session keys derived from a base data value.
 *
 * PARAMS
 *  hProv     [I] Handle to a CSP.
 *  Algid     [I] Identifies the symmetric encryption algorithm to use.
 *  hBaseData [I] Handle to a hash object.
 *  dwFlags   [I] Type of key to generate.
 *  phKey     [I/O] Address of the newly generated key.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptDeriveKey (HCRYPTPROV hProv, ALG_ID Algid, HCRYPTHASH hBaseData,
                DWORD dwFlags, HCRYPTKEY *phKey)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;
        PCRYPTHASH hash = (PCRYPTHASH)hBaseData;
        PCRYPTKEY key;

        TRACE("(0x%lx, 0x%08x, 0x%lx, 0x%08lx, %p)\n", hProv, Algid, hBaseData, dwFlags, phKey);

        if (!prov || !hash)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!phKey || prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if ( !(key = CRYPT_Alloc(sizeof(CRYPTKEY))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        key->pProvider = prov;
        if (prov->pFuncs->pCPDeriveKey(prov->hPrivate, Algid, hash->hPrivate, dwFlags, &key->hPrivate))
        {
            *phKey = (HCRYPTKEY)key;
            return TRUE;
        }

        /* CSP error! */
        CRYPT_Free(key);
        *phKey = 0;
        return FALSE;
}

/******************************************************************************
 * CryptDestroyHash (ADVAPI32.@)
 *
 * Destroys the hash object referenced by hHash.
 *
 * PARAMS
 *  hHash [I] Handle of the hash object to be destroyed.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptDestroyHash (HCRYPTHASH hHash)
{
        PCRYPTHASH hash = (PCRYPTHASH)hHash;
        PCRYPTPROV prov;
        BOOL ret;

        TRACE("(0x%lx)\n", hHash);

        if (!hash)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);

        if (!hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        
        prov = hash->pProvider;
        ret = prov->pFuncs->pCPDestroyHash(prov->hPrivate, hash->hPrivate);
        CRYPT_Free(hash);
        return ret;
}

/******************************************************************************
 * CryptDestroyKey (ADVAPI32.@)
 *
 * Releases the handle referenced by hKey.
 *
 * PARAMS
 *  hKey [I] Handle of the key to be destroyed.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptDestroyKey (HCRYPTKEY hKey)
{
        PCRYPTKEY key = (PCRYPTKEY)hKey;
        PCRYPTPROV prov;
        BOOL ret;

        TRACE("(0x%lx)\n", hKey);

        if (!key)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);

        if (!key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = key->pProvider;
        ret = prov->pFuncs->pCPDestroyKey(prov->hPrivate, key->hPrivate);
        CRYPT_Free(key);
        return ret;
}

/******************************************************************************
 * CryptDuplicateHash (ADVAPI32.@)
 *
 * Duplicates a hash.
 *
 * PARAMS
 *  hHash       [I] Handle to the hash to be copied.
 *  pdwReserved [I] Reserved for future use and must be zero.
 *  dwFlags     [I] Reserved for future use and must be zero.
 *  phHash      [O] Address of the handle to receive the copy.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptDuplicateHash (HCRYPTHASH hHash, DWORD *pdwReserved,
                DWORD dwFlags, HCRYPTHASH *phHash)
{
        PCRYPTPROV prov;
        PCRYPTHASH orghash, newhash;

        TRACE("(0x%lx, %p, %08ld, %p)\n", hHash, pdwReserved, dwFlags, phHash);

        orghash = (PCRYPTHASH)hHash;
        if (!orghash || pdwReserved || !phHash || !orghash->pProvider || 
                orghash->pProvider->dwMagic != MAGIC_CRYPTPROV)
        {
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        }

        prov = orghash->pProvider;
        if (!prov->pFuncs->pCPDuplicateHash)
                CRYPT_ReturnLastError(ERROR_CALL_NOT_IMPLEMENTED);

        if ( !(newhash = CRYPT_Alloc(sizeof(CRYPTHASH))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        newhash->pProvider = prov;
        if (prov->pFuncs->pCPDuplicateHash(prov->hPrivate, orghash->hPrivate, pdwReserved, dwFlags, &newhash->hPrivate))
        {
                *phHash = (HCRYPTHASH)newhash;
                return TRUE;
        }
        CRYPT_Free(newhash);
        return FALSE;
}

/******************************************************************************
 * CryptDuplicateKey (ADVAPI32.@)
 *
 * Duplicate a key and the key's state.
 *
 * PARAMS
 *  hKey        [I] Handle of the key to copy.
 *  pdwReserved [I] Reserved for future use and must be NULL.
 *  dwFlags     [I] Reserved for future use and must be zero.
 *  phKey       [I] Address of the handle to the duplicated key.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptDuplicateKey (HCRYPTKEY hKey, DWORD *pdwReserved, DWORD dwFlags, HCRYPTKEY *phKey)
{
        PCRYPTPROV prov;
        PCRYPTKEY orgkey, newkey;

        TRACE("(0x%lx, %p, %08ld, %p)\n", hKey, pdwReserved, dwFlags, phKey);

        orgkey = (PCRYPTKEY)hKey;
        if (!orgkey || pdwReserved || !phKey || !orgkey->pProvider || 
                orgkey->pProvider->dwMagic != MAGIC_CRYPTPROV)
        {
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        }

        prov = orgkey->pProvider;
        if (!prov->pFuncs->pCPDuplicateKey)
                CRYPT_ReturnLastError(ERROR_CALL_NOT_IMPLEMENTED);

        if ( !(newkey = CRYPT_Alloc(sizeof(CRYPTKEY))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        newkey->pProvider = prov;
        if (prov->pFuncs->pCPDuplicateKey(prov->hPrivate, orgkey->hPrivate, pdwReserved, dwFlags, &newkey->hPrivate))
        {
                *phKey = (HCRYPTKEY)newkey;
                return TRUE;
        }
        CRYPT_Free(newkey);
        return FALSE;
}

/******************************************************************************
 * CryptEncrypt (ADVAPI32.@)
 *
 * Encrypts data.
 *
 * PARAMS
 *  hKey       [I] Handle to the enryption key.
 *  hHash      [I] Handle to a hash object.
 *  Final      [I] TRUE if this is the last section to encrypt.
 *  dwFlags    [I] Can be CRYPT_OAEP.
 *  pbData     [I/O] Data to be encrypted. Contains encrypted data after call.
 *  pdwDataLen [I/O] Length of the data to encrypt. Contains the length of the
 *                   encrypted data after call.
 *  dwBufLen   [I] Length of the input pbData buffer.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 *  NOTES
 *   If pbData is NULL, CryptEncrypt determines stores the number of bytes
 *   required for the returned data in pdwDataLen.
 */
BOOL WINAPI CryptEncrypt (HCRYPTKEY hKey, HCRYPTHASH hHash, BOOL Final,
                DWORD dwFlags, BYTE *pbData, DWORD *pdwDataLen, DWORD dwBufLen)
{
        PCRYPTPROV prov;
        PCRYPTKEY key = (PCRYPTKEY)hKey;
        PCRYPTHASH hash = (PCRYPTHASH)hHash;

        TRACE("(0x%lx, 0x%lx, %d, %08ld, %p, %p, %ld)\n", hKey, hHash, Final, dwFlags, pbData, pdwDataLen, dwBufLen);

        if (!key || !pdwDataLen || !key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = key->pProvider;
        return prov->pFuncs->pCPEncrypt(prov->hPrivate, key->hPrivate, hash ? hash->hPrivate : 0,
                        Final, dwFlags, pbData, pdwDataLen, dwBufLen);
}

/******************************************************************************
 * CryptEnumProvidersW (ADVAPI32.@)
 *
 * Returns the next availabe CSP.
 *
 * PARAMS
 *  dwIndex     [I] Index of the next provider to be enumerated.
 *  pdwReserved [I] Reserved for future use and must be NULL.
 *  dwFlags     [I] Reserved for future use and must be zero.
 *  pdwProvType [O] DWORD designating the type of the provider.
 *  pszProvName [O] Buffer that receives data from the provider.
 *  pcbProvName [I/O] Specifies the size of pszProvName. Contains the number
 *                    of bytes stored in the buffer on return.
 *
 *  RETURNS
 *   Success: TRUE
 *   Failure: FALSE
 *
 *  NOTES
 *   If pszProvName is NULL, CryptEnumProvidersW sets the size of the name
 *   for memory allocation purposes.
 */
BOOL WINAPI CryptEnumProvidersW (DWORD dwIndex, DWORD *pdwReserved,
                DWORD dwFlags, DWORD *pdwProvType, LPWSTR pszProvName, DWORD *pcbProvName)
{
        HKEY hKey;
        
        static const WCHAR providerW[] = {
                'S','o','f','t','w','a','r','e','\\',
                'M','i','c','r','o','s','o','f','t','\\',
                'C','r','y','p','t','o','g','r','a','p','h','y','\\',
                'D','e','f','a','u','l','t','s','\\',
                'P','r','o','v','i','d','e','r',0
        };
        
        static const WCHAR typeW[] = {'T','y','p','e',0};

        TRACE("(%ld, %p, %ld, %p, %p, %p)\n", dwIndex, pdwReserved, dwFlags,
                        pdwProvType, pszProvName, pcbProvName);

        if (pdwReserved || !pcbProvName) CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if (dwFlags) CRYPT_ReturnLastError(NTE_BAD_FLAGS);

        if (RegOpenKeyW(HKEY_LOCAL_MACHINE, providerW, &hKey))
                CRYPT_ReturnLastError(NTE_FAIL);

        if (!pszProvName)
        {
                DWORD numkeys;
                WCHAR *provNameW;
                
                RegQueryInfoKeyW(hKey, NULL, NULL, NULL, &numkeys, pcbProvName,
                                 NULL, NULL, NULL, NULL, NULL, NULL);
                
                if (!(provNameW = CRYPT_Alloc(*pcbProvName * sizeof(WCHAR))))
                        CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
                
                RegEnumKeyExW(hKey, dwIndex, provNameW, pcbProvName, NULL, NULL, NULL, NULL);
                (*pcbProvName)++;
                *pcbProvName *= sizeof(WCHAR);
                
                CRYPT_Free(provNameW);
                
                if (dwIndex >= numkeys)
                        CRYPT_ReturnLastError(ERROR_NO_MORE_ITEMS);
        } else {
                DWORD size = sizeof(DWORD);
                DWORD result;
                HKEY subkey;
                
                result = RegEnumKeyW(hKey, dwIndex, pszProvName, *pcbProvName / sizeof(WCHAR));
                if (result)
                        CRYPT_ReturnLastError(result);
                if (RegOpenKeyW(hKey, pszProvName, &subkey))
                        return FALSE;
                if (RegQueryValueExW(subkey, typeW, NULL, NULL, (BYTE*)pdwProvType, &size))
                        return FALSE;
                RegCloseKey(subkey);
        }
        RegCloseKey(hKey);
        return TRUE;
}

/******************************************************************************
 * CryptEnumProvidersA (ADVAPI32.@)
 *
 * see CryptEnumProvidersW
 */
BOOL WINAPI CryptEnumProvidersA (DWORD dwIndex, DWORD *pdwReserved,
                DWORD dwFlags, DWORD *pdwProvType, LPSTR pszProvName, DWORD *pcbProvName)
{
        PWSTR str = NULL;
        DWORD strlen;
        BOOL ret; /* = FALSE; */

        TRACE("(%ld, %p, %08ld, %p, %p, %p)\n", dwIndex, pdwReserved, dwFlags,
                        pdwProvType, pszProvName, pcbProvName);

        strlen = *pcbProvName * sizeof(WCHAR);
        if ( pszProvName && !(str = CRYPT_Alloc(strlen)) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        ret = CryptEnumProvidersW(dwIndex, pdwReserved, dwFlags, pdwProvType, str, &strlen);
        if (str)
        {
                CRYPT_UnicodeToANSI(str, &pszProvName, *pcbProvName);
                CRYPT_Free(str);
        }
        *pcbProvName = strlen / sizeof(WCHAR);  /* FIXME: not correct */
        return ret;
}

/******************************************************************************
 * CryptEnumProviderTypesA (ADVAPI32i.@)
 *
 * Retrieves the next type of CSP supported.
 *
 * PARAMS
 *  dwIndex     [I] Index of the next provider to be enumerated.
 *  pdwReserved [I] Reserved for future use and must be NULL.
 *  dwFlags     [I] Reserved for future use and must be zero.
 *  pdwProvType [O] DWORD designating the type of the provider.
 *  pszTypeName [O] Buffer that receives data from the provider type.
 *  pcbTypeName [I/O] Specifies the size of pszTypeName. Contains the number
 *                    of bytes stored in the buffer on return.
 *
 *  RETURNS
 *   Success: TRUE
 *   Failure: FALSE
 *
 *  NOTES
 *   If pszTypeName is NULL, CryptEnumProviderTypesA sets the size of the name
 *   for memory allocation purposes.
 */
BOOL WINAPI CryptEnumProviderTypesA (DWORD dwIndex, DWORD *pdwReserved,
                DWORD dwFlags, DWORD *pdwProvType, LPSTR pszTypeName, DWORD *pcbTypeName)
{
        HKEY hKey, hSubkey;
        DWORD keylen, numkeys, dwType;
        PSTR keyname, ch;
        DWORD result;

        TRACE("(%ld, %p, %08ld, %p, %p, %p)\n", dwIndex, pdwReserved,
                dwFlags, pdwProvType, pszTypeName, pcbTypeName);

        if (pdwReserved || !pdwProvType || !pcbTypeName)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if (dwFlags) CRYPT_ReturnLastError(NTE_BAD_FLAGS);

        if (RegOpenKeyA(HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Cryptography\\Defaults\\Provider Types", &hKey))
                return FALSE;

        RegQueryInfoKeyA(hKey, NULL, NULL, NULL, &numkeys, &keylen, NULL, NULL, NULL, NULL, NULL, NULL);
        if (dwIndex >= numkeys)
                CRYPT_ReturnLastError(ERROR_NO_MORE_ITEMS);
        keylen++;
        if ( !(keyname = CRYPT_Alloc(keylen)) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        if ( RegEnumKeyA(hKey, dwIndex, keyname, keylen) ) {
                CRYPT_Free(keyname);
                return FALSE;
        }
        RegOpenKeyA(hKey, keyname, &hSubkey);
        ch = keyname + strlen(keyname);
        /* Convert "Type 000" to 0, etc/ */
        *pdwProvType = *(--ch) - '0';
        *pdwProvType += (*(--ch) - '0') * 10;
        *pdwProvType += (*(--ch) - '0') * 100;
        CRYPT_Free(keyname);
        
        result = RegQueryValueExA(hSubkey, "TypeName", NULL, &dwType, pszTypeName, pcbTypeName);
        if (result)
                CRYPT_ReturnLastError(result);

        RegCloseKey(hSubkey);
        RegCloseKey(hKey);
        return TRUE;
}

/******************************************************************************
 * CryptEnumProviderTypesW (ADVAPI32.@)
 *
 * see CryptEnumProviderTypesA
 */
BOOL WINAPI CryptEnumProviderTypesW (DWORD dwIndex, DWORD *pdwReserved,
                DWORD dwFlags, DWORD *pdwProvType, LPWSTR pszTypeName, DWORD *pcbTypeName)
{
        PSTR str = NULL;
        DWORD strlen;
        BOOL ret;

        TRACE("(%ld, %p, %08ld, %p, %p, %p)\n", dwIndex, pdwReserved, dwFlags,
                        pdwProvType, pszTypeName, pcbTypeName);
        strlen = *pcbTypeName / sizeof(WCHAR);
        if ( pszTypeName && !(str = CRYPT_Alloc(strlen)) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        ret = CryptEnumProviderTypesA(dwIndex, pdwReserved, dwFlags, pdwProvType, str, &strlen);
        if (str)
        {
                CRYPT_ANSIToUnicode(str, &pszTypeName, *pcbTypeName);
                CRYPT_Free(str);
        }
        *pcbTypeName = strlen * sizeof(WCHAR);
        return ret;
}

/******************************************************************************
 * CryptExportKey (ADVAPI32.@)
 * 
 * Exports a cryptographic key from a CSP.
 *
 * PARAMS
 *  hKey       [I] Handle to the key to export.
 *  hExpKey    [I] Handle to a cryptographic key of the end user.
 *  dwBlobType [I] Type of BLOB to be exported.
 *  dwFlags    [I] CRYPT_DESTROYKEY/SSL2_FALLBACK/OAEP.
 *  pbData     [O] Buffer to receive BLOB data.
 *  pdwDataLen [I/O] Specifies the size of pbData.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  if pbData is NULL, CryptExportKey sets pdwDataLen as the size of the
 *  buffer needed to hold the BLOB.
 */
BOOL WINAPI CryptExportKey (HCRYPTKEY hKey, HCRYPTKEY hExpKey, DWORD dwBlobType,
                DWORD dwFlags, BYTE *pbData, DWORD *pdwDataLen)
{
        PCRYPTPROV prov;
        PCRYPTKEY key = (PCRYPTKEY)hKey, expkey = (PCRYPTKEY)hExpKey;

        TRACE("(0x%lx, 0x%lx, %ld, %08ld, %p, %p)\n", hKey, hExpKey, dwBlobType, dwFlags, pbData, pdwDataLen);

        if (!key || !pdwDataLen || !key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = key->pProvider;
        return prov->pFuncs->pCPExportKey(prov->hPrivate, key->hPrivate, expkey ? expkey->hPrivate : 0,
                        dwBlobType, dwFlags, pbData, pdwDataLen);
}

/******************************************************************************
 * CryptGenKey (ADVAPI32.@)
 *
 * Generates a random cryptographic session key or a pub/priv key pair.
 *
 * PARAMS
 *  hProv   [I] Handle to a CSP.
 *  Algid   [I] Algorithm to use to make key.
 *  dwFlags [I] Specifies type of key to make.
 *  phKey   [I] Address of the handle to which the new key is copied.
 *
 *  RETURNS
 *   Success: TRUE
 *   Failure: FALSE
 */
BOOL WINAPI CryptGenKey (HCRYPTPROV hProv, ALG_ID Algid, DWORD dwFlags, HCRYPTKEY *phKey)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;
        PCRYPTKEY key;

        TRACE("(0x%lx, %d, %08ld, %p)\n", hProv, Algid, dwFlags, phKey);

        if (!prov)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!phKey || !prov || prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if ( !(key = CRYPT_Alloc(sizeof(CRYPTKEY))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        key->pProvider = prov;

        if (prov->pFuncs->pCPGenKey(prov->hPrivate, Algid, dwFlags, &key->hPrivate))
        {
            *phKey = (HCRYPTKEY)key;
            return TRUE;
        }

        /* CSP error! */
        CRYPT_Free(key);
        return FALSE;
}

/******************************************************************************
 * CryptGetDefaultProviderA (ADVAPI32.@)
 *
 * Finds the default CSP of a certain provider type.
 *
 * PARAMS
 *  dwProvType  [I] Provider type to look for.
 *  pdwReserved [I] Reserved for future use and must be NULL.
 *  dwFlags     [I] CRYPT_MACHINE_DEFAULT/USER_DEFAULT
 *  pszProvName [O] Name of the default CSP.
 *  pcbProvName [I/O] Size of pszProvName
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  If pszProvName is NULL, pcbProvName will hold the size of the buffer for
 *  memory allocation purposes on return.
 */
BOOL WINAPI CryptGetDefaultProviderA (DWORD dwProvType, DWORD *pdwReserved,
                DWORD dwFlags, LPSTR pszProvName, DWORD *pcbProvName)
{
        HKEY hKey;
        PSTR keyname;
        DWORD result;

        if (pdwReserved || !pcbProvName)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if (dwFlags & ~(CRYPT_USER_DEFAULT | CRYPT_MACHINE_DEFAULT))
                CRYPT_ReturnLastError(NTE_BAD_FLAGS);
        if (dwProvType > 999)
                CRYPT_ReturnLastError(NTE_BAD_PROV_TYPE);
        if ( !(keyname = CRYPT_GetTypeKeyName(dwProvType, dwFlags & CRYPT_USER_DEFAULT)) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        if (RegOpenKeyA((dwFlags & CRYPT_USER_DEFAULT) ?  HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE ,keyname, &hKey))
        {
                CRYPT_Free(keyname);
                CRYPT_ReturnLastError(NTE_PROV_TYPE_NOT_DEF);
        }
        CRYPT_Free(keyname);
        
        result = RegQueryValueExA(hKey, "Name", NULL, NULL, pszProvName, pcbProvName); 
        if (result)
        {
                if (result != ERROR_MORE_DATA)
                        SetLastError(NTE_PROV_TYPE_ENTRY_BAD);
                else
                        SetLastError(result);
                
                return FALSE;
        }
        
        RegCloseKey(hKey);
        return TRUE;
}

/******************************************************************************
 * CryptGetDefaultProviderW (ADVAPI32.@)
 *
 * see CryptGetDefaultProviderA
 */
BOOL WINAPI CryptGetDefaultProviderW (DWORD dwProvType, DWORD *pdwReserved,
                DWORD dwFlags, LPWSTR pszProvName, DWORD *pcbProvName)
{
        PSTR str = NULL;
        DWORD strlen;
        BOOL ret = FALSE;

        TRACE("(%ld, %p, %08ld, %p, %p)\n", dwProvType, pdwReserved, dwFlags, pszProvName, pcbProvName);

        strlen = *pcbProvName / sizeof(WCHAR);
        if ( pszProvName && !(str = CRYPT_Alloc(strlen)) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        ret = CryptGetDefaultProviderA(dwProvType, pdwReserved, dwFlags, str, &strlen);
        if (str)
        {
                CRYPT_ANSIToUnicode(str, &pszProvName, *pcbProvName);
                CRYPT_Free(str);
        }
        *pcbProvName = strlen * sizeof(WCHAR);
        return ret;
}

/******************************************************************************
 * CryptGetHashParam (ADVAPI32.@)
 *
 * Retrieves data that controls the operations of a hash object.
 *
 * PARAMS
 *  hHash      [I] Handle of the hash object to question.
 *  dwParam    [I] Query type.
 *  pbData     [O] Buffer that receives the value data.
 *  pdwDataLen [I/O] Size of the pbData buffer.
 *  dwFlags    [I] Reserved for future use and must be zero.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  If pbData is NULL, pdwDataLen will contain the length required.
 */
BOOL WINAPI CryptGetHashParam (HCRYPTHASH hHash, DWORD dwParam, BYTE *pbData,
                DWORD *pdwDataLen, DWORD dwFlags)
{
        PCRYPTPROV prov;
        PCRYPTHASH hash = (PCRYPTHASH)hHash;

        TRACE("(0x%lx, %ld, %p, %p, %08ld)\n", hHash, dwParam, pbData, pdwDataLen, dwFlags);

        if (!hash || !pdwDataLen || !hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = hash->pProvider;
        return prov->pFuncs->pCPGetHashParam(prov->hPrivate, hash->hPrivate, dwParam,
                        pbData, pdwDataLen, dwFlags);
}

/******************************************************************************
 * CryptGetKeyParam (ADVAPI32.@)
 *
 * Retrieves data that controls the operations of a key.
 *
 * PARAMS
 *  hKey       [I] Handle to they key in question.
 *  dwParam    [I] Specifies query type.
 *  pbData     [O] Sequence of bytes to receive data.
 *  pdwDataLen [I/O] Size of pbData.
 *  dwFlags    [I] Reserved for future use and must be zero.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  If pbData is NULL, pdwDataLen is set to the needed length of the buffer.
 */
BOOL WINAPI CryptGetKeyParam (HCRYPTKEY hKey, DWORD dwParam, BYTE *pbData,
                DWORD *pdwDataLen, DWORD dwFlags)
{
        PCRYPTPROV prov;
        PCRYPTKEY key = (PCRYPTKEY)hKey;

        TRACE("(0x%lx, %ld, %p, %p, %08ld)\n", hKey, dwParam, pbData, pdwDataLen, dwFlags);

        if (!key || !pdwDataLen || !key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = key->pProvider;
        return prov->pFuncs->pCPGetKeyParam(prov->hPrivate, key->hPrivate, dwParam,
                        pbData, pdwDataLen, dwFlags);
}

/******************************************************************************
 * CryptGetProvParam (ADVAPI32.@)
 *
 * Retrieves parameters that control the operations of a CSP.
 *
 * PARAMS
 *  hProv      [I] Handle of the CSP in question.
 *  dwParam    [I] Specifies query type.
 *  pbData     [O] Buffer to receive the data.
 *  pdwDataLen [I/O] Size of pbData.
 *  dwFlags    [I] see MSDN Docs.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  If pbData is NULL, pdwDataLen is set to the needed buffer length.
 */
BOOL WINAPI CryptGetProvParam (HCRYPTPROV hProv, DWORD dwParam, BYTE *pbData,
                DWORD *pdwDataLen, DWORD dwFlags)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;

        TRACE("(0x%lx, %ld, %p, %p, %08ld)\n", hProv, dwParam, pbData, pdwDataLen, dwFlags);

        if (!prov || prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        return prov->pFuncs->pCPGetProvParam(prov->hPrivate, dwParam, pbData, pdwDataLen, dwFlags);
}

/******************************************************************************
 * CryptGetUserKey (ADVAPI32.@)
 *
 * Gets a handle of one of a user's two public/private key pairs.
 *
 * PARAMS
 *  hProv     [I] Handle of a CSP.
 *  dwKeySpec [I] Private key to use.
 *  phUserKey [O] Pointer to the handle of the retrieved keys.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptGetUserKey (HCRYPTPROV hProv, DWORD dwKeySpec, HCRYPTKEY *phUserKey)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;
        PCRYPTKEY key;

        TRACE("(0x%lx, %ld, %p)\n", hProv, dwKeySpec, phUserKey);

        if (!prov)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!phUserKey || prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if ( !(key = CRYPT_Alloc(sizeof(CRYPTKEY))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        key->pProvider = prov;

        if (prov->pFuncs->pCPGetUserKey(prov->hPrivate, dwKeySpec, &key->hPrivate))
        {
            *phUserKey = (HCRYPTKEY)key;
            return TRUE;
        }

        /* CSP Error */
        CRYPT_Free(key);
        *phUserKey = 0;
        return FALSE;
}

/******************************************************************************
 * CryptHashData (ADVAPI32.@)
 *
 * Adds data to a hash object.
 *
 * PARAMS
 *  hHash     [I] Handle of the hash object.
 *  pbData    [I] Buffer of data to be hashed.
 *  dwDataLen [I] Number of bytes to add.
 *  dwFlags   [I] Can be CRYPT_USERDATA
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptHashData (HCRYPTHASH hHash, BYTE *pbData, DWORD dwDataLen, DWORD dwFlags)
{
        PCRYPTHASH hash = (PCRYPTHASH)hHash;
        PCRYPTPROV prov;

        TRACE("(0x%lx, %p, %ld, %08ld)\n", hHash, pbData, dwDataLen, dwFlags);

        if (!hash)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!pbData || !dwDataLen || !hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = hash->pProvider;
        return prov->pFuncs->pCPHashData(prov->hPrivate, hash->hPrivate, pbData, dwDataLen, dwFlags);
}

/******************************************************************************
 * CryptHashSessionKey (ADVAPI32.@)
 *
 * PARAMS 
 *  hHash   [I] Handle to the hash object.
 *  hKey    [I] Handle to the key to be hashed.
 *  dwFlags [I] Can be CRYPT_LITTLE_ENDIAN.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptHashSessionKey (HCRYPTHASH hHash, HCRYPTKEY hKey, DWORD dwFlags)
{
        PCRYPTHASH hash = (PCRYPTHASH)hHash;
        PCRYPTKEY key = (PCRYPTKEY)hKey;
        PCRYPTPROV prov;

        TRACE("(0x%lx, 0x%lx, %08ld)\n", hHash, hKey, dwFlags);

        if (!hash || !key)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);

        if (!hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = hash->pProvider;
        return prov->pFuncs->pCPHashSessionKey(prov->hPrivate, hash->hPrivate, key->hPrivate, dwFlags);
}

/******************************************************************************
 * CryptImportKey (ADVAPI32.@)
 *
 * PARAMS
 *  hProv     [I] Handle of a CSP.
 *  pbData    [I] Contains the key to be imported.
 *  dwDataLen [I] Length of the key.
 *  hPubKey   [I] Cryptographic key that decrypts pdData
 *  dwFlags   [I] Used only with a public/private key pair.
 *  phKey     [O] Imported key.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptImportKey (HCRYPTPROV hProv, BYTE *pbData, DWORD dwDataLen,
                HCRYPTKEY hPubKey, DWORD dwFlags, HCRYPTKEY *phKey)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;
        PCRYPTKEY pubkey = (PCRYPTKEY)hPubKey, importkey;

        TRACE("(0x%lx, %p, %ld, 0x%lx, %08ld, %p)\n", hProv, pbData, dwDataLen, hPubKey, dwFlags, phKey);

        if (!prov || !pbData || !dwDataLen || !phKey || prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        if ( !(importkey = CRYPT_Alloc(sizeof(CRYPTKEY))) )
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);

        importkey->pProvider = prov;
        if (prov->pFuncs->pCPImportKey(prov->hPrivate, pbData, dwDataLen,
                        pubkey ? pubkey->hPrivate : 0, dwFlags, &importkey->hPrivate))
        {
                *phKey = (HCRYPTKEY)importkey;
                return TRUE;
        }

        CRYPT_Free(importkey);
        return FALSE;
}

/******************************************************************************
 * CryptSignHashW (ADVAPI32.@)
 *
 * Signs data.
 *
 * PARAMS
 *  hHash        [I] Handle of the hash object to be signed.
 *  dwKeySpec    [I] Private key to use.
 *  sDescription [I] Should be NULL.
 *  dwFlags      [I] CRYPT_NOHASHOID/X931_FORMAT.
 *  pbSignature  [O] Buffer of the signature data.
 *  pdwSigLen    [I/O] Size of the pbSignature buffer.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 *
 * NOTES
 *  Because of security flaws sDescription should not be used and should thus be
 *  NULL. It is supported only for compatibility with Microsoft's Cryptographic
 *  Providers.
 */
BOOL WINAPI CryptSignHashW (HCRYPTHASH hHash, DWORD dwKeySpec, LPCWSTR sDescription,
                DWORD dwFlags, BYTE *pbSignature, DWORD *pdwSigLen)
{
        PCRYPTHASH hash = (PCRYPTHASH)hHash;
        PCRYPTPROV prov;

        TRACE("(0x%lx, %ld, %s, %08ld, %p, %p)\n", 
                hHash, dwKeySpec, debugstr_w(sDescription), dwFlags, pbSignature, pdwSigLen);

        if (!hash)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!pdwSigLen || !hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = hash->pProvider;
        return prov->pFuncs->pCPSignHash(prov->hPrivate, hash->hPrivate, dwKeySpec, sDescription,
                dwFlags, pbSignature, pdwSigLen);
}

/******************************************************************************
 * CryptSignHashA (ADVAPI32.@)
 *
 * ASCII version of CryptSignHashW
 */
BOOL WINAPI CryptSignHashA (HCRYPTHASH hHash, DWORD dwKeySpec, LPCSTR sDescription,
                DWORD dwFlags, BYTE *pbSignature, DWORD *pdwSigLen)
{
        LPWSTR wsDescription;
        BOOL result;

        TRACE("(0x%lx, %ld, %s, %08ld, %p, %p)\n", 
                hHash, dwKeySpec, debugstr_a(sDescription), dwFlags, pbSignature, pdwSigLen);

        CRYPT_ANSIToUnicode(sDescription, &wsDescription, -1);
        result = CryptSignHashW(hHash, dwKeySpec, wsDescription, dwFlags, pbSignature, pdwSigLen);
        if (wsDescription) CRYPT_Free(wsDescription);

        return result;
}

/******************************************************************************
 * CryptSetHashParam (ADVAPI32.@)
 *
 * Customizes the operations of a hash object.
 *
 * PARAMS
 *  hHash   [I] Handle of the hash object to set parameters.
 *  dwParam [I] HP_HMAC_INFO/HASHVAL.
 *  pbData  [I] Value data buffer.
 *  dwFlags [I] Reserved for future use and must be zero.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptSetHashParam (HCRYPTHASH hHash, DWORD dwParam, BYTE *pbData, DWORD dwFlags)
{
        PCRYPTPROV prov;
        PCRYPTHASH hash = (PCRYPTHASH)hHash;

        TRACE("(0x%lx, %ld, %p, %08ld)\n", hHash, dwParam, pbData, dwFlags);

        if (!hash || !pbData || !hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = hash->pProvider;
        return prov->pFuncs->pCPSetHashParam(prov->hPrivate, hash->hPrivate,
                        dwParam, pbData, dwFlags);
}

/******************************************************************************
 * CryptSetKeyParam (ADVAPI32.@)
 *
 * Customizes a session key's operations.
 *
 * PARAMS
 *  hKey    [I] Handle to the key to set values.
 *  dwParam [I] See MSDN Doc.
 *  pbData  [I] Buffer of values to set.
 *  dwFlags [I] Only used when dwParam == KP_ALGID.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptSetKeyParam (HCRYPTKEY hKey, DWORD dwParam, BYTE *pbData, DWORD dwFlags)
{
        PCRYPTPROV prov;
        PCRYPTKEY key = (PCRYPTKEY)hKey;

        TRACE("(0x%lx, %ld, %p, %08ld)\n", hKey, dwParam, pbData, dwFlags);

        if (!key || !pbData || !key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);

        prov = key->pProvider;
        return prov->pFuncs->pCPSetKeyParam(prov->hPrivate, key->hPrivate,
                        dwParam, pbData, dwFlags);
}

/******************************************************************************
 * CryptSetProviderA (ADVAPI32.@)
 *
 * Specifies the current user's default CSP.
 *
 * PARAMS
 *  pszProvName [I] Name of the new default CSP.
 *  dwProvType  [I] Provider type of the CSP.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptSetProviderA (LPCSTR pszProvName, DWORD dwProvType)
{
        TRACE("(%s, %ld)\n", pszProvName, dwProvType);
        return CryptSetProviderExA(pszProvName, dwProvType, NULL, CRYPT_USER_DEFAULT);
}

/******************************************************************************
 * CryptSetProviderW (ADVAPI32.@)
 *
 * See CryptSetProviderA
 */
BOOL WINAPI CryptSetProviderW (LPCWSTR pszProvName, DWORD dwProvType)
{
        TRACE("(%s, %ld)\n", debugstr_w(pszProvName), dwProvType);
        return CryptSetProviderExW(pszProvName, dwProvType, NULL, CRYPT_USER_DEFAULT);
}

/******************************************************************************
 * CryptSetProviderExA (ADVAPI32.@)
 *
 * Specifies the default CSP.
 *
 * PARAMS
 *  pszProvName [I] Name of the new default CSP.
 *  dwProvType  [I] Provider type of the CSP.
 *  pdwReserved [I] Reserved for future use and must be NULL.
 *  dwFlags     [I] See MSDN Doc.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptSetProviderExA (LPCSTR pszProvName, DWORD dwProvType, DWORD *pdwReserved, DWORD dwFlags)
{
        HKEY hProvKey, hTypeKey;
        PSTR keyname;

        TRACE("(%s, %ld, %p, %08ld)\n", pszProvName, dwProvType, pdwReserved, dwFlags);

        if (!pszProvName || pdwReserved)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if (dwProvType > MAXPROVTYPES)
                CRYPT_ReturnLastError(NTE_BAD_PROV_TYPE);
        if (dwFlags & ~(CRYPT_MACHINE_DEFAULT | CRYPT_USER_DEFAULT | CRYPT_DELETE_DEFAULT)
                        || dwFlags == CRYPT_DELETE_DEFAULT)
                CRYPT_ReturnLastError(NTE_BAD_FLAGS);
        
        if (!(keyname = CRYPT_GetTypeKeyName(dwProvType, dwFlags & CRYPT_USER_DEFAULT)))
                CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
        if (RegOpenKeyA((dwFlags & CRYPT_USER_DEFAULT) ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE,
                keyname, &hTypeKey))
        {
                CRYPT_Free(keyname);
                CRYPT_ReturnLastError(NTE_BAD_PROVIDER);
        }
        CRYPT_Free(keyname);
        
        if (dwFlags & CRYPT_DELETE_DEFAULT)
        {
                RegDeleteValueA(hTypeKey, "Name");
        }
        else
        {
                if (!(keyname = CRYPT_GetProvKeyName(pszProvName)))
                {
                        RegCloseKey(hTypeKey);
                        CRYPT_ReturnLastError(ERROR_NOT_ENOUGH_MEMORY);
                }
                if (RegOpenKeyA((dwFlags & CRYPT_USER_DEFAULT) ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE,
                        keyname, &hProvKey))
                {
                        CRYPT_Free(keyname);
                        RegCloseKey(hTypeKey);
                        CRYPT_ReturnLastError(NTE_BAD_PROVIDER);
                }
                CRYPT_Free(keyname);
                
                if (RegSetValueExA(hTypeKey, "Name", 0, REG_SZ, pszProvName, strlen(pszProvName) + 1))
                {
                        RegCloseKey(hTypeKey);
                        RegCloseKey(hProvKey);
                        return FALSE;
                }
                
                RegCloseKey(hProvKey);
        }
        RegCloseKey(hTypeKey);

        return TRUE;
}

/******************************************************************************
 * CryptSetProviderExW (ADVAPI32.@)
 *
 * See CryptSetProviderExA
 */
BOOL WINAPI CryptSetProviderExW (LPCWSTR pszProvName, DWORD dwProvType, DWORD *pdwReserved, DWORD dwFlags)
{
        BOOL ret = FALSE;
        PSTR str = NULL;

        TRACE("(%s, %ld, %p, %08ld)\n", debugstr_w(pszProvName), dwProvType, pdwReserved, dwFlags);

        if (CRYPT_UnicodeToANSI(pszProvName, &str, -1))
        {
                ret = CryptSetProviderExA(str, dwProvType, pdwReserved, dwFlags);
                CRYPT_Free(str);
        }
        return ret;
}

/******************************************************************************
 * CryptSetProvParam (ADVAPI32.@)
 *
 * Customizes the operations of a CSP.
 *
 * PARAMS
 *  hProv   [I] Handle of a CSP.
 *  dwParam [I] See MSDN Doc.
 *  pbData  [I] Buffer that contains a value to set as a parameter.
 *  dwFlags [I] if dwParam is PP_USE_HARDWARE_RNG, dwFlags must be zero.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 */
BOOL WINAPI CryptSetProvParam (HCRYPTPROV hProv, DWORD dwParam, BYTE *pbData, DWORD dwFlags)
{
        PCRYPTPROV prov = (PCRYPTPROV)hProv;

        TRACE("(0x%lx, %ld, %p, %08ld)\n", hProv, dwParam, pbData, dwFlags);

        if (!prov)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (prov->dwMagic != MAGIC_CRYPTPROV)
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        if (dwFlags & PP_USE_HARDWARE_RNG)
        {
                FIXME("PP_USE_HARDWARE_RNG: What do I do with this?\n");
                FIXME("\tLetting the CSP decide.\n");
        }
        if (dwFlags & PP_CLIENT_HWND)
        {
                /* FIXME: Should verify the parameter */
                if (pbData /* && IsWindow((HWND)pbData) */)
                {
                        crypt_hWindow = (HWND)(pbData);
                        return TRUE;
                } else {
                        SetLastError(ERROR_INVALID_PARAMETER);
                        return FALSE;
                }
        }
        /* All other flags go to the CSP */
        return prov->pFuncs->pCPSetProvParam(prov->hPrivate, dwParam, pbData, dwFlags);
}

/******************************************************************************
 * CryptVerifySignatureW (ADVAPI32.@)
 *
 * Verifies the signature of a hash object.
 *
 * PARAMS
 *  hHash        [I] Handle of the hash object to verify.
 *  pbSignature  [I] Signature data to verify.
 *  dwSigLen     [I] Size of pbSignature.
 *  hPubKey      [I] Handle to the public key to authenticate signature.
 *  sDescription [I] Should be NULL.
 *  dwFlags      [I] See MSDN doc.
 *
 * RETURNS
 *  Success: TRUE
 *  Failure: FALSE
 * 
 * NOTES
 *  Because of security flaws sDescription should not be used and should thus be
 *  NULL. It is supported only for compatibility with Microsoft's Cryptographic
 *  Providers.
 */
BOOL WINAPI CryptVerifySignatureW (HCRYPTHASH hHash, BYTE *pbSignature, DWORD dwSigLen,
                HCRYPTKEY hPubKey, LPCWSTR sDescription, DWORD dwFlags)
{
        PCRYPTHASH hash = (PCRYPTHASH)hHash;
        PCRYPTKEY key = (PCRYPTKEY)hPubKey;
        PCRYPTPROV prov;

        TRACE("(0x%lx, %p, %ld, 0x%lx, %s, %08ld)\n", hHash, pbSignature,
                        dwSigLen, hPubKey, debugstr_w(sDescription), dwFlags);

        if (!hash || !key)
                CRYPT_ReturnLastError(ERROR_INVALID_HANDLE);
        if (!pbSignature || !dwSigLen || 
            !hash->pProvider || hash->pProvider->dwMagic != MAGIC_CRYPTPROV ||
            !key->pProvider || key->pProvider->dwMagic != MAGIC_CRYPTPROV)
        {
                CRYPT_ReturnLastError(ERROR_INVALID_PARAMETER);
        }
                
        prov = hash->pProvider;
        return prov->pFuncs->pCPVerifySignature(prov->hPrivate, hash->hPrivate, pbSignature, dwSigLen,
                key->hPrivate, sDescription, dwFlags);
}

/******************************************************************************
 * CryptVerifySignatureA (ADVAPI32.@)
 *
 * ASCII version of CryptVerifySignatureW
 */
BOOL WINAPI CryptVerifySignatureA (HCRYPTHASH hHash, BYTE *pbSignature, DWORD dwSigLen,
                HCRYPTKEY hPubKey, LPCSTR sDescription, DWORD dwFlags)
{
        LPWSTR wsDescription;
        BOOL result;

        TRACE("(0x%lx, %p, %ld, 0x%lx, %s, %08ld)\n", hHash, pbSignature,
                        dwSigLen, hPubKey, debugstr_a(sDescription), dwFlags);

        CRYPT_ANSIToUnicode(sDescription, &wsDescription, -1);
        result = CryptVerifySignatureW(hHash, pbSignature, dwSigLen, hPubKey, wsDescription, dwFlags);
        if (wsDescription) CRYPT_Free(wsDescription);

        return result;
}

/******************************************************************************
 * SystemFunction036   (ADVAPI32.@)
 *
 * MSDN documents this function as RtlGenRandom and declares it in ntsecapi.h
 *
 * PARAMS
 *  pbBufer [O] Pointer to memory to receive random bytes.
 *  dwLen   [I] Number of random bytes to fetch.
 */

BOOL WINAPI SystemFunction036(PVOID pbBuffer, ULONG dwLen)
{
    int dev_random;

    /* FIXME: /dev/urandom does not provide random numbers of a sufficient
     * quality for cryptographic applications. /dev/random is much better,  
     * but it blocks if the kernel has not yet collected enough entropy for
     * the request, which will suspend the calling thread for an indefinite
     * amount of time. */
    dev_random = open("/dev/urandom", O_RDONLY);
    if (dev_random != -1)
    {
        if (read(dev_random, pbBuffer, dwLen) == (ssize_t)dwLen)
        {
            close(dev_random);
            return TRUE;
        }
        close(dev_random);
    }
    SetLastError(NTE_FAIL);
    return FALSE;
}    
    
/*
   These functions have nearly identical prototypes to CryptProtectMemory and CryptUnprotectMemory,
   in crypt32.dll.
 */

/******************************************************************************
 * SystemFunction040   (ADVAPI32.@)
 *
 * MSDN documents this function as RtlEncryptMemory.
 *
 * PARAMS
 *  memory [I/O] Pointer to memory to encrypt.
 *  length [I] Length of region to encrypt in bytes.
 *  flags  [I] Control whether other processes are able to decrypt the memory.
 *    RTL_ENCRYPT_OPTION_SAME_PROCESS 
 *    RTL_ENCRYPT_OPTION_CROSS_PROCESS 
 *    RTL_ENCRYPT_OPTION_SAME_LOGON
 *    
 * NOTES
 *  length must be a multiple of RTL_ENCRYPT_MEMORY_SIZE.
 *  If flags are specified when encrypting, the same flag value must be given
 *  when decrypting the memory.
 */
NTSTATUS WINAPI SystemFunction040(PVOID memory, ULONG length, ULONG flags)
{
        FIXME("(%p, %lx, %lx): stub [RtlEncryptMemory]\n", memory, length, flags);
        return STATUS_SUCCESS;
}

/******************************************************************************
 * SystemFunction041  (ADVAPI32.@)
 *
 * MSDN documents this function as RtlDecryptMemory.
 *
 * PARAMS
 *  memory [I/O] Pointer to memory to decrypt.
 *  length [I] Length of region to decrypt in bytes.
 *  flags  [I] Control whether other processes are able to decrypt the memory.
 *    RTL_ENCRYPT_OPTION_SAME_PROCESS
 *    RTL_ENCRYPT_OPTION_CROSS_PROCESS
 *    RTL_ENCRYPT_OPTION_SAME_LOGON
 *
 * NOTES
 *  length must be a multiple of RTL_ENCRYPT_MEMORY_SIZE.
 *  If flags are specified when encrypting, the same flag value must be given
 *  when decrypting the memory.
 */
NTSTATUS WINAPI SystemFunction041(PVOID memory, ULONG length, ULONG flags)
{
        FIXME("(%p, %lx, %lx): stub [RtlDecryptMemory]\n", memory, length, flags);
        return STATUS_SUCCESS;
}