Add SHA-224 from InSiTo, written and (C) by FlexSecure GmbH

Rename sha256.h and sha_64.h to sha2_32.h and sha2_64.h - this affects
users who instantiate these classes directly.

1 files changed, 57 insertions, 0 deletions

diff --git a/src/hash/sha2/sha2_32.h b/src/hash/sha2/sha2_32.h
new file mode 100644
index 000000000..a767b3d10
--- /dev/null
+++ b/src/hash/sha2/sha2_32.h
@@ -0,0 +1,57 @@
+/*************************************************
+* SHA-{224,256} Header File                      *
+* (C) 1999-2008 Jack Lloyd                       *
+*     2007 FlexSecure GmbH                       *
+*************************************************/
+
+#ifndef BOTAN_SHA_256_H__
+#define BOTAN_SHA_256_H__
+
+#include <botan/mdx_hash.h>
+
+namespace Botan {
+
+/*************************************************
+* SHA-{224,256} Base                             *
+*************************************************/
+class BOTAN_DLL SHA_224256_BASE : public MDx_HashFunction
+   {
+   protected:
+      void clear() throw();
+      SHA_224256_BASE(u32bit out) :
+         MDx_HashFunction(out, 64, true, true) { clear(); }
+
+      SecureBuffer<u32bit, 64> W;
+      SecureBuffer<u32bit, 8> digest;
+   private:
+      void hash(const byte[]);
+      void copy_out(byte[]);
+   };
+
+/*************************************************
+* SHA-224                                        *
+*************************************************/
+class BOTAN_DLL SHA_224 : public SHA_224256_BASE
+   {
+   public:
+      void clear() throw();
+      std::string name() const { return "SHA-224"; }
+      HashFunction* clone() const { return new SHA_224; }
+      SHA_224() : SHA_224256_BASE(28) { clear(); }
+   };
+
+/*************************************************
+* SHA-256                                        *
+*************************************************/
+class BOTAN_DLL SHA_256 : public SHA_224256_BASE
+   {
+   public:
+      void clear() throw();
+      std::string name() const { return "SHA-256"; }
+      HashFunction* clone() const { return new SHA_256; }
+      SHA_256() : SHA_224256_BASE(32) { clear (); }
+   };
+
+}
+
+#endif