tanjent@gmail.com | 7e5c363 | 2010-11-02 00:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * sha1.h |
| 3 | * |
| 4 | * Copyright (C) 1998, 2009 |
| 5 | * Paul E. Jones <paulej@packetizer.com> |
| 6 | * All Rights Reserved. |
| 7 | * |
| 8 | ***************************************************************************** |
| 9 | * $Id: sha1.h 12 2009-06-22 19:34:25Z paulej $ |
| 10 | ***************************************************************************** |
| 11 | * |
| 12 | * Description: |
| 13 | * This class implements the Secure Hashing Standard as defined |
| 14 | * in FIPS PUB 180-1 published April 17, 1995. |
| 15 | * |
| 16 | * Many of the variable names in this class, especially the single |
| 17 | * character names, were used because those were the names used |
| 18 | * in the publication. |
| 19 | * |
| 20 | * Please read the file sha1.cpp for more information. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #ifndef _SHA1_H_ |
| 25 | #define _SHA1_H_ |
| 26 | |
| 27 | class SHA1 |
| 28 | { |
| 29 | |
| 30 | public: |
| 31 | |
| 32 | SHA1(); |
| 33 | virtual ~SHA1(); |
| 34 | |
| 35 | /* |
| 36 | * Re-initialize the class |
| 37 | */ |
| 38 | void Reset(); |
| 39 | |
| 40 | /* |
| 41 | * Returns the message digest |
| 42 | */ |
| 43 | bool Result(unsigned *message_digest_array); |
| 44 | |
| 45 | /* |
| 46 | * Provide input to SHA1 |
| 47 | */ |
| 48 | void Input( const unsigned char *message_array, |
| 49 | unsigned length); |
| 50 | void Input( const char *message_array, |
| 51 | unsigned length); |
| 52 | void Input(unsigned char message_element); |
| 53 | void Input(char message_element); |
| 54 | SHA1& operator<<(const char *message_array); |
| 55 | SHA1& operator<<(const unsigned char *message_array); |
| 56 | SHA1& operator<<(const char message_element); |
| 57 | SHA1& operator<<(const unsigned char message_element); |
| 58 | |
| 59 | private: |
| 60 | |
| 61 | /* |
| 62 | * Process the next 512 bits of the message |
| 63 | */ |
| 64 | void ProcessMessageBlock(); |
| 65 | |
| 66 | /* |
| 67 | * Pads the current message block to 512 bits |
| 68 | */ |
| 69 | void PadMessage(); |
| 70 | |
| 71 | /* |
| 72 | * Performs a circular left shift operation |
| 73 | */ |
| 74 | inline unsigned CircularShift(int bits, unsigned word); |
| 75 | |
| 76 | unsigned H[5]; // Message digest buffers |
| 77 | |
| 78 | unsigned Length_Low; // Message length in bits |
| 79 | unsigned Length_High; // Message length in bits |
| 80 | |
| 81 | unsigned char Message_Block[64]; // 512-bit message blocks |
| 82 | int Message_Block_Index; // Index into message block array |
| 83 | |
| 84 | bool Computed; // Is the digest computed? |
| 85 | bool Corrupted; // Is the message digest corruped? |
| 86 | |
| 87 | }; |
| 88 | |
| 89 | #endif |