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Overview
| Comment: | Protect access to the CryptoAPI provider handle with a mutex. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
2847ced3666f238d4189530fc3b5cc4a |
| User & Date: | mistachkin 2013-02-26 00:39:53 |
Context
|
2013-02-26
| ||
| 02:51 | Style fix. check-in: 44eb94e4ec user: mistachkin tags: trunk | |
| 00:39 | Protect access to the CryptoAPI provider handle with a mutex. check-in: 2847ced366 user: mistachkin tags: trunk | |
|
2013-02-25
| ||
| 23:37 | Adjust the Fossil ignore-glob settings file. check-in: 101f077d2c user: mistachkin tags: trunk | |
Changes
Changes to SQLite.Interop/src/win/crypt.c.
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}
/* Create a cryptographic context. Use the enhanced provider because it is available on
** most platforms
*/
static BOOL InitializeProvider()
{
if (g_hProvider) return TRUE;
if (!CryptAcquireContext(&g_hProvider, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
{
return FALSE;
}
return TRUE;
}
/* Create or update a cryptographic context for a pager.
** This function will automatically determine if the encryption algorithm requires
** extra padding, and if it does, will create a temp buffer big enough to provide
** space to hold it.
................................................................................
if (!pKey || !nKeyLen) return 0;
if (!InitializeProvider())
{
return MAXDWORD;
}
if (CryptCreateHash(g_hProvider, CALG_SHA1, 0, 0, &hHash))
{
if (CryptHashData(hHash, (LPBYTE)pKey, nKeyLen, 0))
{
CryptDeriveKey(g_hProvider, CALG_RC4, hHash, 0, &hKey);
}
CryptDestroyHash(hHash);
}
return hKey;
}
/* Called by sqlite and sqlite3_key_interop to attach a key to a database. */
int sqlite3CodecAttach(sqlite3 *db, int nDb, const void *pKey, int nKeyLen)
{
int rc = SQLITE_ERROR;
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}
/* Create a cryptographic context. Use the enhanced provider because it is available on
** most platforms
*/
static BOOL InitializeProvider()
{
MUTEX_LOGIC( sqlite3_mutex *pMaster = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER); )
sqlite3_mutex_enter(pMaster);
if (g_hProvider) {
sqlite3_mutex_leave(pMaster);
return TRUE;
}
if (!CryptAcquireContext(&g_hProvider, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
{
sqlite3_mutex_leave(pMaster);
return FALSE;
}
sqlite3_mutex_leave(pMaster);
return TRUE;
}
/* Create or update a cryptographic context for a pager.
** This function will automatically determine if the encryption algorithm requires
** extra padding, and if it does, will create a temp buffer big enough to provide
** space to hold it.
................................................................................
if (!pKey || !nKeyLen) return 0;
if (!InitializeProvider())
{
return MAXDWORD;
}
{
MUTEX_LOGIC( sqlite3_mutex *pMaster = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER); )
sqlite3_mutex_enter(pMaster);
if (CryptCreateHash(g_hProvider, CALG_SHA1, 0, 0, &hHash))
{
if (CryptHashData(hHash, (LPBYTE)pKey, nKeyLen, 0))
{
CryptDeriveKey(g_hProvider, CALG_RC4, hHash, 0, &hKey);
}
CryptDestroyHash(hHash);
}
sqlite3_mutex_leave(pMaster);
}
return hKey;
}
/* Called by sqlite and sqlite3_key_interop to attach a key to a database. */
int sqlite3CodecAttach(sqlite3 *db, int nDb, const void *pKey, int nKeyLen)
{
int rc = SQLITE_ERROR;
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