crypt32: Add parameter validation.

[Zhipeng Zhao]

Thanks your review, after a bit more test, I found the behavior of these func is consistent of Windows'. The problem I got need to be solved in some elsewhere.



At 2020-07-02 14:33:25, "Zhiyi Zhang" <zzhang at codeweavers.com> wrote:




On 7/2/20 1:53 PM, Zhipeng Zhao wrote:


0001-crypt32-Add-parameter-validation.patch
From 63c44d4282ecdbb233bf3c26463336d08ca04ea3 Mon Sep 17 00:00:00 2001
From: Zhipeng Zhao <zhaozhipeng at uniontech.com>
Date: Thu, 2 Jul 2020 13:47:26 +0800
Subject: [PATCH] crypt32: Add parameter validation.

Signed-off-by: Zhipeng Zhao <zhaozhipeng at uniontech.com>
---
 dlls/crypt32/msg.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/dlls/crypt32/msg.c b/dlls/crypt32/msg.c
index f591a5e72e..42cb9d0e31 100644
--- a/dlls/crypt32/msg.c
+++ b/dlls/crypt32/msg.c
@@ -3660,6 +3660,12 @@ BOOL WINAPI CryptMsgClose(HCRYPTMSG hCryptMsg)
 BOOL WINAPI CryptMsgUpdate(HCRYPTMSG hCryptMsg, const BYTE *pbData,
  DWORD cbData, BOOL fFinal)
 {
+    if (!hCryptMsg)
+    {
+        SetLastError(E_INVALIDARG);
+        return FALSE;
+    }
+
     CryptMsgBase *msg = hCryptMsg;
This makes the msg declaration no longer at the beginning of a block.
See https://wiki.winehq.org/Developer_Hints#Using_only_C89-compliant_code

What application needs this change? If hCryptMsg really needs to be checked
against NULL, there are many more functions that make use of the handle.
Maybe you should add a helper for it.

And please add tests for this change.

Thanks,
Zhiyi


 
     TRACE("(%p, %p, %d, %d)\n", hCryptMsg, pbData, cbData, fFinal);
@@ -3670,6 +3676,12 @@ BOOL WINAPI CryptMsgUpdate(HCRYPTMSG hCryptMsg, const BYTE *pbData,
 BOOL WINAPI CryptMsgGetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
  DWORD dwIndex, void *pvData, DWORD *pcbData)
 {
+    if (!hCryptMsg)
+    {
+        SetLastError(E_INVALIDARG);
+        return FALSE;
+    }
+
     CryptMsgBase *msg = hCryptMsg;
 
     TRACE("(%p, %d, %d, %p, %p)\n", hCryptMsg, dwParamType, dwIndex,
@@ -3680,6 +3692,12 @@ BOOL WINAPI CryptMsgGetParam(HCRYPTMSG hCryptMsg, DWORD dwParamType,
 BOOL WINAPI CryptMsgControl(HCRYPTMSG hCryptMsg, DWORD dwFlags,
  DWORD dwCtrlType, const void *pvCtrlPara)
 {
+    if (!hCryptMsg)
+    {
+        SetLastError(E_INVALIDARG);
+        return FALSE;
+    }
+
     CryptMsgBase *msg = hCryptMsg;
 
     TRACE("(%p, %08x, %d, %p)\n", hCryptMsg, dwFlags, dwCtrlType,


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