rsaenh: Fix read_key_container bug that prevents CryptAcquireContext from…

dlls/rsaenh/rsaenh.c

@@ -1050,6 +1050,7 @@ static HCRYPTPROV read_key_container(PCHAR pszContainerName, DWORD dwFlags, PVTa
     KEYCONTAINER *pKeyContainer;
     HCRYPTPROV hKeyContainer;
     DATA_BLOB blobIn, blobOut;
+    HCRYPTKEY hCryptKey;
 
     sprintf(szRSABase, RSAENH_REGKEY, pszContainerName);
 
@@ -1089,8 +1090,9 @@ static HCRYPTPROV read_key_container(PCHAR pszContainerName, DWORD dwFlags, PVTa
                     if (CryptUnprotectData(&blobIn, NULL, NULL, NULL, NULL, 
                          (dwFlags & CRYPT_MACHINE_KEYSET) ? CRYPTPROTECT_LOCAL_MACHINE : 0, &blobOut))
                     {
-                        RSAENH_CPImportKey(hKeyContainer, blobOut.pbData, blobOut.cbData, 0, 0,
-                                           &pKeyContainer->hKeyExchangeKeyPair);
+                        if(RSAENH_CPImportKey(hKeyContainer, blobOut.pbData, blobOut.cbData, 0, 0,
+                                           &hCryptKey))
+                            pKeyContainer->hKeyExchangeKeyPair = hCryptKey;
                         HeapFree(GetProcessHeap(), 0, blobOut.pbData);
                     }
                 }
@@ -1113,8 +1115,9 @@ static HCRYPTPROV read_key_container(PCHAR pszContainerName, DWORD dwFlags, PVTa
                     if (CryptUnprotectData(&blobIn, NULL, NULL, NULL, NULL, 
                          (dwFlags & CRYPT_MACHINE_KEYSET) ? CRYPTPROTECT_LOCAL_MACHINE : 0, &blobOut))
                     {
-                        RSAENH_CPImportKey(hKeyContainer, blobOut.pbData, blobOut.cbData, 0, 0,
-                                           &pKeyContainer->hSignatureKeyPair);
+                        if(RSAENH_CPImportKey(hKeyContainer, blobOut.pbData, blobOut.cbData, 0, 0,
+                                           &hCryptKey))
+                            pKeyContainer->hSignatureKeyPair = hCryptKey;
                         HeapFree(GetProcessHeap(), 0, blobOut.pbData);
                     }
                 }

dlls/rsaenh/tests/rsaenh.c

@@ -1603,6 +1603,26 @@ static void test_null_provider(void)
 
     CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
      CRYPT_DELETEKEYSET);
+
+
+    /* test for the bug in accessing the user key in a container
+     */
+    result = CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+     CRYPT_NEWKEYSET);
+    ok(result, "CryptAcquireContext failed: %08x\n", GetLastError());
+    result = CryptGenKey(prov, AT_KEYEXCHANGE, 0, &key);
+    ok(result, "CryptGenKey with AT_KEYEXCHANGE failed with error %08x\n", GetLastError());
+    CryptDestroyKey(key);
+    CryptReleaseContext(prov,0);
+    result = CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,0);
+    ok(result, "CryptAcquireContext failed: 0x%08x\n", GetLastError());
+    result = CryptGetUserKey(prov, AT_KEYEXCHANGE, &key);
+    ok (result, "CryptGetUserKey failed with error %08x\n", GetLastError());
+    CryptDestroyKey(key);
+
+    CryptAcquireContext(&prov, szContainer, NULL, PROV_RSA_FULL,
+     CRYPT_DELETEKEYSET);
+
 }
 
 START_TEST(rsaenh)