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| author | Jeffrey Walton <noloader@gmail.com> | 2015-11-05 01:59:46 -0500 |
|---|---|---|
| committer | Jeffrey Walton <noloader@gmail.com> | 2015-11-05 01:59:46 -0500 |
| commit | 48809d4e85c125814425c621d8d0d89f95405924 (patch) | |
| tree | 1010fd16c4b1199f3d27dd726dda241a2bd29f83 /gf256.cpp | |
| parent | 025337a94aceb75d188149db70c2094673772816 (diff) | |
| download | cryptopp-git-48809d4e85c125814425c621d8d0d89f95405924.tar.gz | |
CRYPTOPP 5.6.3 RC6 checkin
Diffstat (limited to 'gf256.cpp')
| -rw-r--r-- | gf256.cpp | 68 |
1 files changed, 34 insertions, 34 deletions
@@ -1,34 +1,34 @@ -// gf256.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" -#include "gf256.h" - -NAMESPACE_BEGIN(CryptoPP) - -GF256::Element GF256::Multiply(Element a, Element b) const -{ - word result = 0, t = b; - - for (unsigned int i=0; i<8; i++) - { - result <<= 1; - if (result & 0x100) - result ^= m_modulus; - - t <<= 1; - if (t & 0x100) - result ^= a; - } - - return (GF256::Element) result; -} - -GF256::Element GF256::MultiplicativeInverse(Element a) const -{ - Element result = a; - for (int i=1; i<7; i++) - result = Multiply(Square(result), a); - return Square(result); -} - -NAMESPACE_END +// gf256.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+#include "gf256.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+GF256::Element GF256::Multiply(Element a, Element b) const
+{
+ word result = 0, t = b;
+
+ for (unsigned int i=0; i<8; i++)
+ {
+ result <<= 1;
+ if (result & 0x100)
+ result ^= m_modulus;
+
+ t <<= 1;
+ if (t & 0x100)
+ result ^= a;
+ }
+
+ return (GF256::Element) result;
+}
+
+GF256::Element GF256::MultiplicativeInverse(Element a) const
+{
+ Element result = a;
+ for (int i=1; i<7; i++)
+ result = Multiply(Square(result), a);
+ return Square(result);
+}
+
+NAMESPACE_END
|