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sha1.cpp (Sha 1 secure hash digest algorithm C++ source code file) Print E-mail
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//
//  sha1.cpp
//  XDiceLock
//
//  Created by DiceLock on 1/3/12.
//  Copyright (c) 2009-2012 DiceLock Security, LLC. All rights reserved.
//
 
//
// Creator:    http://www.dicelocksecurity.com
// Version:    vers.8.0.0.1
//
// Copyright (c) 2009-2012 DiceLock Security, LLC. All rights reserved.
//
//                               DISCLAIMER
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// DICELOCK IS A REGISTERED TRADEMARK OR TRADEMARK OF THE OWNERS.
// 
 
#include "sha1.h"
 
 
#define SHA1_Operation_Ini(f, a, b, c, d, e, temp, j, K)\
(*temp) = SHA1_RotateLeft((*a), 5) + f((*b), (*c), (*d)) + (*e) + (K) + (messageSchedule[j]);\
(*e) = (*d);\
(*d) = (*c);\
(*c) = SHA1_RotateLeft((*b), 30) ;\
(*b) = (*a);\
(*a) = (*temp);
 
#define SHA1_Operation_Tail(f, a, b, c, d, e, temp, j, K)\
messageSchedule[j] = (SHA1_RotateLeft(messageSchedule[j-3] ^ messageSchedule[j-8] ^ messageSchedule[j-14] ^ messageSchedule[j-16], 1));\
(*temp) = SHA1_RotateLeft((*a), 5) + f((*b), (*c), (*d)) + (*e) + (K) + (messageSchedule[j]);\
(*e) = (*d);\
(*d) = (*c);\
(*c) = SHA1_RotateLeft((*b), 30) ;\
(*b) = (*a);\
(*a) = (*temp);
 
 
namespace DiceLockSecurity {
  
    namespace Hash {
        
        // Hash Algorithms Class enumerator name
        const Hashes Sha1::hashName = SHA_1;
        
        // Number of hash bits
        const unsigned short int Sha1::hashBits = SHA1_DIGESTBITS;
        // Number of hash unsigned chars
        const unsigned short int Sha1::hashUCs = SHA1_DIGESTUCHARS;
        // Number of hash unsigned short ints
        const unsigned short int Sha1::hashUSs = SHA1_DIGESTUSHORTS;
        // Number of hash unsigned ints
        const unsigned short int Sha1::hashULs = SHA1_DIGESTUINTS;
        
        // Number of schedule words
        const unsigned short int Sha1::scheduleNumber = SHA1_MESSAGESCHEDULE;
        
        // Initial hash values of SHA1 
        const unsigned int Sha1::initials[SHA1_DIGESTUINTS] = {0x67452301UL, 
            0xefcdab89UL, 
            0x98badcfeUL, 
            0x10325476UL, 
            0xc3d2e1f0UL};
        
        // Computational constant values of SHA1 
        const unsigned int Sha1::constants[SHA1_COMPUTECONSTANTS] = {0x5a827999UL, 
            0x6ed9eba1UL, 
            0x8f1bbcdcUL, 
            0xca62c1d6UL};
        
        // Computes the chunk block of information  
        void Sha1::Compress(BaseCryptoRandomStream* digest, unsigned char* stream) {
            unsigned int a, b, c, d, e, temp;
            unsigned short int i;
            
            // Initilizing working variables
            a = digest->GetULPosition(0);
            b = digest->GetULPosition(1);
            c = digest->GetULPosition(2);
            d = digest->GetULPosition(3);
            e = digest->GetULPosition(4);
            
            for (i = 0; i < this->hashBlockULs; i++) {
                messageSchedule[i] = (stream[i*4] << 24) | (stream[i*4+1] << 16) | (stream[i*4+2] << 8) | (stream[i*4+3]);
            }
            
            //  0 <= t <= 19
            for (i = 0; i < 16; i++) {
                SHA1_Operation_Ini(BASESHA_32_Ch, &a, &b, &c, &d, &e, &temp, i, this->constants[0]);
            }
            for (i = 16; i < 20; i++) {
                SHA1_Operation_Tail(BASESHA_32_Ch, &a, &b, &c, &d, &e, &temp, i, this->constants[0]);
            }
            // 20 <= t <= 39
            for (i = 20; i < 40; i++) {
                SHA1_Operation_Tail(SHA1_Parity, &a, &b, &c, &d, &e, &temp, i, this->constants[1]);
            }
            // 40 <= t <= 59
            for (i = 40; i < 60; i++) {
                SHA1_Operation_Tail(BASESHA_32_Maj, &a, &b, &c, &d, &e, &temp, i, this->constants[2]);
            }
            // 60 <= t <= 79
            for (i = 60; i < SHA1_OPERATIONS; i++) {
                SHA1_Operation_Tail(SHA1_Parity, &a, &b, &c, &d, &e, &temp, i, this->constants[3]);
            }
            // Upgrading hash values
            digest->SetULPosition(0, digest->GetULPosition(0) + a);
            digest->SetULPosition(1, digest->GetULPosition(1) + b);
            digest->SetULPosition(2, digest->GetULPosition(2) + c);
            digest->SetULPosition(3, digest->GetULPosition(3) + d);
            digest->SetULPosition(4, digest->GetULPosition(4) + e);
        }
        
        // Constructor, default 
        Sha1::Sha1() {
        }
        
        // Destructor
        Sha1::~Sha1() {
        }
        
        // Initializes common states of Sha1 algorithm
        void Sha1::Initialize(void) {
            
            this->messageDigest->SetULPosition(0, this->initials[0]);
            this->messageDigest->SetULPosition(1, this->initials[1]);
            this->messageDigest->SetULPosition(2, this->initials[2]);
            this->messageDigest->SetULPosition(3, this->initials[3]);
            this->messageDigest->SetULPosition(4, this->initials[4]);
            this->remainingBytesLength = 0;
            this->messageBitLengthHigh = 0;
            this->messageBitLengthLow = 0;
        }
        
        // Finalizes hash and performs little endian transformation
        void Sha1::Finalize(void) {
            
            this->BaseSha32::Finalize();
            this->SwapLittleEndian();
        }
        
        // Gets hash length in bits
        unsigned short int Sha1::GetBitHashLength(void) {
            
            return this->hashBits;
        }
        
        // Gets hash length in unsigned chars
        unsigned short int Sha1::GetUCHashLength(void) {
            
            return this->hashUCs;
        }
        
        // Gets hash length in unsigned short ints
        unsigned short int Sha1::GetUSHashLength(void) {
            
            return this->hashUSs;
        }
        
        // Gets hash length in unsigned ints
        unsigned short int Sha1::GetULHashLength(void) {
            
            return this->hashULs;
        }
        
        // Gets the type of the object
        Hashes Sha1::GetType(void) {
            
            return this->hashName;
        }
    }
}