Jacek Caban : crypt32: Always set returned size in CRYPT_CopySignerInfo.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 39ba0bbe437498ee6252694f771e686e7e7b98af
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=39ba0bbe437498ee6252694f771e686e7e7b98af

Author: Jacek Caban <jacek at codeweavers.com>
Date:   Thu Feb  1 01:28:02 2018 +0100

crypt32: Always set returned size in CRYPT_CopySignerInfo.

Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/crypt32/msg.c       | 3 +--
 dlls/crypt32/tests/msg.c | 5 ++++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/dlls/crypt32/msg.c b/dlls/crypt32/msg.c
index 80b2de7..fd43a7b 100644
--- a/dlls/crypt32/msg.c
+++ b/dlls/crypt32/msg.c
@@ -2727,12 +2727,10 @@ static BOOL CRYPT_CopySignerInfo(void *pvData, DWORD *pcbData,
     size += CRYPT_SizeOfAttributes(&in->UnauthAttrs);
     if (!pvData)
     {
-        *pcbData = size;
         ret = TRUE;
     }
     else if (*pcbData < size)
     {
-        *pcbData = size;
         SetLastError(ERROR_MORE_DATA);
         ret = FALSE;
     }
@@ -2765,6 +2763,7 @@ static BOOL CRYPT_CopySignerInfo(void *pvData, DWORD *pcbData,
             CRYPT_CopyAttributes(&out->UnauthAttrs, &in->UnauthAttrs, &nextData);
         }
     }
+    *pcbData = size;
     TRACE("returning %d\n", ret);
     return ret;
 }
diff --git a/dlls/crypt32/tests/msg.c b/dlls/crypt32/tests/msg.c
index e9887b0..c240533 100644
--- a/dlls/crypt32/tests/msg.c
+++ b/dlls/crypt32/tests/msg.c
@@ -2857,7 +2857,7 @@ static void test_decode_msg_get_param(void)
     HCRYPTPROV hCryptProv;
     HCRYPTKEY key = 0;
     BOOL ret;
-    DWORD size = 0, value;
+    DWORD size = 0, value, req_size;
     LPBYTE buf;
     CMSG_CTRL_DECRYPT_PARA decryptPara = { sizeof(decryptPara), 0 };
 
@@ -2947,7 +2947,10 @@ static void test_decode_msg_get_param(void)
         signer.SerialNumber.cbData = sizeof(serialNum);
         signer.SerialNumber.pbData = serialNum;
         signer.HashAlgorithm.pszObjId = oid_rsa_md5;
+        req_size = size;
+        size += 10;
         CryptMsgGetParam(msg, CMSG_SIGNER_INFO_PARAM, 0, buf, &size);
+        ok(size == req_size, "size = %u, expected %u\n", size, req_size);
         compare_signer_info((CMSG_SIGNER_INFO *)buf, &signer);
         CryptMemFree(buf);
     }