Clear GCC overflow warning

weidai11 · Apr 25, 2024 · 9bb6680 · 9bb6680
1 parent c2bd7ef
commit 9bb6680
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/esign.cpp b/esign.cpp
@@ -111,6 +111,9 @@ void InvertibleESIGNFunction::GenerateRandom(RandomNumberGenerator &rng, const N
 
 	if (param.GetValue("Seed", seedParam))
 	{
+		if (seedParam.size() > seed.ELEMS_MAX - 4)
+			throw InvalidArgument("InvertibleESIGNFunction::GenerateRandom: buffer overflow");
+
 		seed.resize(seedParam.size() + 4);
 		std::memcpy(seed + 4, seedParam.begin(), seedParam.size());