1 files changed, 39 insertions, 0 deletions
diff --git a/CPP/7zip/Crypto/Hash/HmacSha1.h b/CPP/7zip/Crypto/Hash/HmacSha1.h
new file mode 100755
index 00000000..bca5bcf8
--- /dev/null
+++ b/CPP/7zip/Crypto/Hash/HmacSha1.h
@@ -0,0 +1,39 @@
+// HmacSha1.h
+// Implements HMAC-SHA-1 (RFC2104, FIPS-198)
+
+#ifndef _HMAC_H
+#define _HMAC_H
+
+#include "Sha1.h"
+
+namespace NCrypto {
+namespace NSha1 {
+
+// Use:  SetKey(key, keySize); for () Update(data, size); Final(mac, macSize);
+
+class CHmac
+{
+  CContext _sha;
+  CContext _sha2;
+public:
+  void SetKey(const Byte *key, size_t keySize);
+  void Update(const Byte *data, size_t dataSize) { _sha.Update(data, dataSize); }
+  void Final(Byte *mac, size_t macSize = kDigestSize);
+};
+
+class CHmac32
+{
+  CContext32 _sha;
+  CContext32 _sha2;
+public:
+  void SetKey(const Byte *key, size_t keySize);
+  void Update(const UInt32 *data, size_t dataSize) { _sha.Update(data, dataSize); }
+  void Final(UInt32 *mac, size_t macSize = kDigestSizeInWords);
+  
+  // It'sa for hmac function. in,out: mac[kDigestSizeInWords].
+  void GetLoopXorDigest(UInt32 *mac, UInt32 numIteration);
+};
+
+}}
+
+#endif