1 files changed, 89 insertions, 0 deletions
diff --git a/Stars45/Sha1.h b/Stars45/Sha1.h
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+/*
+*    Sha1.h
+*
+*    Copyright (C) 1998
+*    Paul E. Jones <paulej@acm.org>
+*    All Rights Reserved.
+*
+*****************************************************************************
+*    $Id: sha1.h,v 1.4 2001/03/20 06:25:06 paulej Exp $
+*****************************************************************************
+*
+*    Description:
+*         This class implements the Secure Hashing Standard as defined
+*         in FIPS PUB 180-1 published April 17, 1995.
+*
+*        Many of the variable names in this class, especially the single
+*        character names, were used because those were the names used
+*        in the publication.
+*
+*         Please read the file sha1.cpp for more information.
+*
+*/
+
+#ifndef _SHA1_H_
+#define _SHA1_H_
+
+class SHA1
+{
+
+public:
+
+    SHA1();
+    virtual ~SHA1();
+
+    /*
+        *    Re-initialize the class
+        */
+    void Reset();
+
+    /*
+        *    Returns the message digest
+        */
+    bool Result(unsigned *message_digest_array);
+
+    /*
+        *    Provide input to SHA1
+        */
+    void Input(    const unsigned char    *message_array,
+    unsigned            length);
+    void Input(    const char    *message_array,
+    unsigned    length);
+    void Input(unsigned char message_element);
+    void Input(char message_element);
+    SHA1& operator<<(const char *message_array);
+    SHA1& operator<<(const unsigned char *message_array);
+    SHA1& operator<<(const char message_element);
+    SHA1& operator<<(const unsigned char message_element);
+
+private:
+
+    /*
+        *    Process the next 512 bits of the message
+        */
+    void ProcessMessageBlock();
+
+    /*
+        *    Pads the current message block to 512 bits
+        */
+    void PadMessage();
+
+    /*
+        *    Performs a circular left shift operation
+        */
+    inline unsigned CircularShift(int bits, unsigned word);
+
+    unsigned H[5];                        // Message digest buffers
+
+    unsigned Length_Low;                // Message length in bits
+    unsigned Length_High;                // Message length in bits
+
+    unsigned char Message_Block[64];    // 512-bit message blocks
+    int Message_Block_Index;            // Index into message block array
+
+    bool Computed;                        // Is the digest computed?
+    bool Corrupted;                        // Is the message digest corruped?
+    
+};
+
+#endif