rsaenh: Use the correct registry key in RSAENH_CPAcquireContext.

dlls/rsaenh/rsaenh.c

@@ -1476,7 +1476,12 @@ BOOL WINAPI RSAENH_CPAcquireContext(HCRYPTPROV *phProv, LPSTR pszContainer,
                 SetLastError(NTE_BAD_KEYSET_PARAM);
                 return FALSE;
             } else {
-                if (!RegDeleteKeyA(HKEY_CURRENT_USER, szRegKey)) {
+                HKEY hRootKey;
+                if (dwFlags & CRYPT_MACHINE_KEYSET)
+                    hRootKey = HKEY_LOCAL_MACHINE;
+                else
+                    hRootKey = HKEY_CURRENT_USER;
+                if (!RegDeleteKeyA(hRootKey, szRegKey)) {
                     SetLastError(ERROR_SUCCESS);
                     return TRUE;
                 } else {

dlls/rsaenh/tests/rsaenh.c

@@ -1623,6 +1623,26 @@ static void test_null_provider(void)
     CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
      CRYPT_DELETEKEYSET);
 
+    /* test the machine key set */
+    CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+     CRYPT_DELETEKEYSET|CRYPT_MACHINE_KEYSET);
+    result = CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+     CRYPT_NEWKEYSET|CRYPT_MACHINE_KEYSET);
+    ok(result, "CryptAcquireContext with CRYPT_MACHINE_KEYSET failed: %08x\n", GetLastError());
+    CryptReleaseContext(prov, 0);
+    result = CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+     CRYPT_MACHINE_KEYSET);
+    ok(result, "CryptAcquireContext with CRYPT_MACHINE_KEYSET failed: %08x\n", GetLastError());
+    CryptReleaseContext(prov,0);
+    result = CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+       CRYPT_DELETEKEYSET|CRYPT_MACHINE_KEYSET);
+    ok(result, "CryptAcquireContext with CRYPT_DELETEKEYSET|CRYPT_MACHINE_KEYSET failed: %08x\n",
+		GetLastError());
+    result = CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+     CRYPT_MACHINE_KEYSET);
+    ok(!result && GetLastError() == NTE_BAD_KEYSET ,
+	"Expected NTE_BAD_KEYSET, got %08x\n", GetLastError());
+
 }
 
 START_TEST(rsaenh)