15.05

CPP/7zip/Crypto/Sha1Cls.h

@@ -0,0 +1,51 @@
+// Crypto/Sha1.h
+
+#ifndef __CRYPTO_SHA1_H
+#define __CRYPTO_SHA1_H
+
+#include "../../../C/Sha1.h"
+
+namespace NCrypto {
+namespace NSha1 {
+
+const unsigned kNumBlockWords = SHA1_NUM_BLOCK_WORDS;
+const unsigned kNumDigestWords = SHA1_NUM_DIGEST_WORDS;
+
+const unsigned kBlockSize = SHA1_BLOCK_SIZE;
+const unsigned kDigestSize = SHA1_DIGEST_SIZE;
+
+class CContextBase
+{
+protected:
+  CSha1 _s;
+ 
+public:
+  void Init() throw() { Sha1_Init(&_s); }
+  void GetBlockDigest(const UInt32 *blockData, UInt32 *destDigest) throw() { Sha1_GetBlockDigest(&_s, blockData, destDigest); }
+};
+
+class CContext: public CContextBase
+{
+public:
+  void Update(const Byte *data, size_t size) throw() { Sha1_Update(&_s, data, size); }
+  void UpdateRar(Byte *data, size_t size, bool rar350Mode) throw() { Sha1_Update_Rar(&_s, data, size, rar350Mode ? 1 : 0); }
+  void Final(Byte *digest) throw() { Sha1_Final(&_s, digest); }
+};
+
+class CContext32: public CContextBase
+{
+public:
+  void Update(const UInt32 *data, size_t size) throw() { Sha1_32_Update(&_s, data, size); }
+  void Final(UInt32 *digest) throw() { Sha1_32_Final(&_s, digest); }
+  
+  /* PrepareBlock can be used only when size <= 13. size in Words
+     _buffer must be empty (_count & 0xF) == 0) */
+  void PrepareBlock(UInt32 *block, unsigned size) const throw()
+  {
+    Sha1_32_PrepareBlock(&_s, block, size);
+  }
+};
+
+}}
+
+#endif