Juan Lang : crypt32: Check length of sequence before checking tag.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 254f9b9c01d9aee3c475843ea0357b5b90de9e8c
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=254f9b9c01d9aee3c475843ea0357b5b90de9e8c

Author: Juan Lang <juan.lang at gmail.com>
Date:   Mon Sep  8 12:30:01 2008 -0700

crypt32: Check length of sequence before checking tag.

---

 dlls/crypt32/decode.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/dlls/crypt32/decode.c b/dlls/crypt32/decode.c
index eb782d3..0d46fe3 100644
--- a/dlls/crypt32/decode.c
+++ b/dlls/crypt32/decode.c
@@ -475,6 +475,11 @@ static BOOL CRYPT_AsnDecodeSequence(struct AsnDecodeSequenceItem items[],
      cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
      startingPointer);
 
+    if (!cbEncoded)
+    {
+        SetLastError(CRYPT_E_ASN1_EOD);
+        return FALSE;
+    }
     if (pbEncoded[0] == ASN_SEQUENCE)
     {
         DWORD dataLen;