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//
// Creator: http://www.dicelocksecurity.com
// Version: vers.5.0.0.1
//
// Copyright 2009-2011 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 <memory.h>
#include "sha256.h"
#define SHA256_Operation_Ini(a, b, c, d, e, f, g, h, temp1, temp2, j)\
(*temp1) = (*h) + SHA256_SUM_1((*e)) + BASESHA_32_Ch((*e), (*f), (*g)) + (this->constants[j]) + (messageSchedule[j]);\
(*temp2) = SHA256_SUM_0((*a)) + BASESHA_32_Maj((*a), (*b), (*c));\
(*h) = (*g);\
(*g) = (*f);\
(*f) = (*e);\
(*e) = (*d) + (*temp1);\
(*d) = (*c);\
(*c) = (*b);\
(*b) = (*a);\
(*a) = ((*temp1) + (*temp2));
#define SHA256_Operation_Tail(a, b, c, d, e, f, g, h, temp1, temp2, j)\
messageSchedule[j] = (SHA256_SIG_1(messageSchedule[j-2]) + messageSchedule[j-7] + SHA256_SIG_0(messageSchedule[j-15]) + messageSchedule[j-16]);\
(*temp1) = (*h) + SHA256_SUM_1((*e)) + BASESHA_32_Ch((*e), (*f), (*g)) + (this->constants[j]) + (messageSchedule[j]);\
(*temp2) = SHA256_SUM_0((*a)) + BASESHA_32_Maj((*a), (*b), (*c));\
(*h) = (*g);\
(*g) = (*f);\
(*f) = (*e);\
(*e) = (*d) + (*temp1);\
(*d) = (*c);\
(*c) = (*b);\
(*b) = (*a);\
(*a) = ((*temp1) + (*temp2));
namespace DiceLockSecurity {
namespace Hash {
// Hash Algorithms Class enumerator name
const Hashes Sha256::hashName = SHA_256;
// Number of hash bits
const unsigned short int Sha256::hashBits = SHA256_DIGESTBITS;
// Number of hash unsigned chars
const unsigned short int Sha256::hashUCs = SHA256_DIGESTUCHARS;
// Number of hash unsigned short ints
const unsigned short int Sha256::hashUSs = SHA256_DIGESTUSHORTS;
// Number of hash unsigned long ints
const unsigned short int Sha256::hashULs = SHA256_DIGESTULONGS;
// Number of schedule words
const unsigned short int Sha256::scheduleNumber = SHA256_MESSAGESCHEDULE;
// Initial hash values of SHA1
const unsigned long int Sha256::initials[SHA256_DIGESTULONGS] = {0x6a09e667UL,
0xbb67ae85UL,
0x3c6ef372UL,
0xa54ff53aUL,
0x510e527fUL,
0x9b05688cUL,
0x1f83d9abUL,
0x5be0cd19UL};
// Computational constant values of SHA1
const unsigned long int Sha256::constants[SHA256_COMPUTECONSTANTS] =
{0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL, 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL, 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL};
// Computes the chunk block of information
void Sha256::Compress(BaseCryptoRandomStream* digest, unsigned char* stream) {
unsigned long int a, b, c, d, e, f, g, h, temp1, temp2;
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);
f = digest->GetULPosition(5);
g = digest->GetULPosition(6);
h = digest->GetULPosition(7);
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++) {
SHA256_Operation_Ini(&a, &b, &c, &d, &e, &f, &g, &h, &temp1, &temp2, i);
}
// 16 <= t <= 63
for (i = 16; i < SHA256_OPERATIONS; i++) {
SHA256_Operation_Tail(&a, &b, &c, &d, &e, &f, &g, &h, &temp1, &temp2, i);
}
// 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);
digest->SetULPosition(5, digest->GetULPosition(5) + f);
digest->SetULPosition(6, digest->GetULPosition(6) + g);
digest->SetULPosition(7, digest->GetULPosition(7) + h);
}
// Constructor, default
Sha256::Sha256() {
}
// Destructor
Sha256::~Sha256() {
}
// Initializes common states of Sha256 algorithm
void Sha256::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->messageDigest->SetULPosition(5, this->initials[5]);
this->messageDigest->SetULPosition(6, this->initials[6]);
this->messageDigest->SetULPosition(7, this->initials[7]);
this->remainingBytesLength = 0;
this->messageBitLengthHigh = 0;
this->messageBitLengthLow = 0;
}
// Finalizes hash and performs little endian transformation
void Sha256::Finalize(void) {
this->BaseSha32::Finalize();
this->SwapLittleEndian();
}
// Gets hash length in bits
unsigned short int Sha256::GetBitHashLength(void) {
return this->hashBits;
}
// Gets hash length in unsigned chars
unsigned short int Sha256::GetUCHashLength(void) {
return this->hashUCs;
}
// Gets hash length in unsigned short ints
unsigned short int Sha256::GetUSHashLength(void) {
return this->hashUSs;
}
// Gets hash length in unsigned long ints
unsigned short int Sha256::GetULHashLength(void) {
return this->hashULs;
}
// Gets the type of the object
Hashes Sha256::GetType(void) {
return this->hashName;
}
}
}
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