Guard string assignment

Visual Studio 2005 fired an assert on the negative self tests because the SecByteBlock was 0-sized and returned a null pointer.

1 files changed, 4 insertions, 1 deletions

diff --git a/asn.cpp b/asn.cpp
index 2502597f..fb1bff0d 100644
--- a/asn.cpp
+++ b/asn.cpp
@@ -171,7 +171,10 @@ size_t BERDecodeTextString(BufferedTransformation &bt, std::string &str, byte as
 	SecByteBlock temp(bc);

 	if (bc != bt.Get(temp, bc))

 		BERDecodeError();

-	str.assign((char *)temp.begin(), bc);

+	if (bc)

+		str.assign((char *)temp.begin(), bc);

+	else

+		str.clear();

 	return bc;

 }