Pass workspace size to various bigint_ functions

These functions made assumptions about the workspace size available,
which if incorrect would cause memory corruption. Since the length is
always available at the caller, just provide it and avoid problems.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/math/bigint/big_ops2.cpp b/src/lib/math/bigint/big_ops2.cpp
index 639d87ceb..2f81989c3 100644
--- a/src/lib/math/bigint/big_ops2.cpp
+++ b/src/lib/math/bigint/big_ops2.cpp
@@ -119,7 +119,7 @@ BigInt& BigInt::operator*=(const BigInt& y)
       {
       grow_to(size() + y.size());
       secure_vector<word> workspace(size());
-      bigint_mul(*this, BigInt(*this), y, workspace.data());
+      bigint_mul(*this, BigInt(*this), y, workspace.data(), workspace.size());
       }
 
    return (*this);
diff --git a/src/lib/math/bigint/big_ops3.cpp b/src/lib/math/bigint/big_ops3.cpp
index 680eca635..8bff790a6 100644
--- a/src/lib/math/bigint/big_ops3.cpp
+++ b/src/lib/math/bigint/big_ops3.cpp
@@ -95,7 +95,7 @@ BigInt operator*(const BigInt& x, const BigInt& y)
    else if(x_sw && y_sw)
       {
       secure_vector<word> workspace(z.size());
-      bigint_mul(z, x, y, workspace.data());
+      bigint_mul(z, x, y, workspace.data(), workspace.size());
       }
 
    if(x_sw && y_sw && x.sign() != y.sign())