File libcryptopp-CVE-2016-9939.patch of Package libcryptopp.32010

Index: libcryptopp-5.6.5/asn.cpp
===================================================================
--- libcryptopp-5.6.5.orig/asn.cpp	2021-09-07 12:43:04.245957955 +0200
+++ libcryptopp-5.6.5/asn.cpp	2021-09-07 12:49:34.676301343 +0200
@@ -123,6 +123,8 @@ size_t BERDecodeOctetString(BufferedTran
 	size_t bc;
 	if (!BERLengthDecode(bt, bc))
 		BERDecodeError();
+	if (bc > bt.MaxRetrievable())
+		BERDecodeError();
 
 	str.New(bc);
 	if (bc != bt.Get(str, bc))
@@ -139,6 +141,8 @@ size_t BERDecodeOctetString(BufferedTran
 	size_t bc;
 	if (!BERLengthDecode(bt, bc))
 		BERDecodeError();
+	if (bc > bt.MaxRetrievable())
+		BERDecodeError();
 
 	bt.TransferTo(str, bc);
 	return bc;
@@ -161,6 +165,8 @@ size_t BERDecodeTextString(BufferedTrans
 	size_t bc;
 	if (!BERLengthDecode(bt, bc))
 		BERDecodeError();
+	if (bc > bt.MaxRetrievable())
+		BERDecodeError();
 
 	SecByteBlock temp(bc);
 	if (bc != bt.Get(temp, bc))
@@ -188,7 +194,10 @@ size_t BERDecodeBitString(BufferedTransf
 	size_t bc;
 	if (!BERLengthDecode(bt, bc))
 		BERDecodeError();
-
+	if (bc == 0)
+		BERDecodeError();
+	if (bc > bt.MaxRetrievable())
+		BERDecodeError();
 	byte unused;
 	if (!bt.Get(unused))
 		BERDecodeError();
Index: libcryptopp-5.6.5/asn.h
===================================================================
--- libcryptopp-5.6.5.orig/asn.h	2021-09-07 12:43:04.245957955 +0200
+++ libcryptopp-5.6.5/asn.h	2021-09-07 12:50:28.728625771 +0200
@@ -486,6 +486,8 @@ void BERDecodeUnsigned(BufferedTransform
 	bool definite = BERLengthDecode(in, bc);
 	if (!definite)
 		BERDecodeError();
+	if (bc > in.MaxRetrievable())
+		BERDecodeError();
 
 	SecByteBlock buf(bc);