Fix error in bits2octets: should use the base point's bit count, instead of the hash value's. Also add test case for GetRandom, with original data from RFC6979 (#560)

1 files changed, 1 insertions, 1 deletions

diff --git a/gfpcrypt.h b/gfpcrypt.h
index 81689f89..1f28a864 100644
--- a/gfpcrypt.h
+++ b/gfpcrypt.h
@@ -384,7 +384,7 @@ protected:
     // curve's order.

     SecByteBlock bits2octets(const SecByteBlock& in, const Integer& q) const

     {

-        Integer b2 = bits2int(in, in.size()*8);

+        Integer b2 = bits2int(in, q.BitCount());

         Integer b1 = b2 - q;

         return int2octets(b1.IsNegative() ? b2 : b1, q.ByteCount());

     }