Tuesday, 17 October 2017

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md5.cpp (Message Digest 5 hash digest algorithm C++ source code file) Print E-mail
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//
// Creator:    http://www.dicelocksecurity.com
// Version:    vers.9.0.0.1
//
// Copyright (C) 2012-2013 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.
// 
// DICELOCK IS PROTECTED BY US PATENT 7508945 AND EUROPEAN PATENT 1182777 WHERE APPLICABLE.
//
// LICENSE INFORMATION CAN BE OBTAINED AT CORPORATE WEB SITE
//
 
#include <memory.h>
#include "defaultCryptoRandomStream.h"
#include "md5.h"
 
 
// Constants for MD5Transform routine.
#define MD5_S11 7
#define MD5_S12 12
#define MD5_S13 17
#define MD5_S14 22
#define MD5_S21 5
#define MD5_S22 9
#define MD5_S23 14
#define MD5_S24 20
#define MD5_S31 4
#define MD5_S32 11
#define MD5_S33 16
#define MD5_S34 23
#define MD5_S41 6
#define MD5_S42 10
#define MD5_S43 15
#define MD5_S44 21
 
 
namespace DiceLockSecurity {
  
  namespace Hash {
 
  // Hash Algorithms Class enumerator name
  const Hashes Md5::hashName = MD_5;
 
  // Number of hash bits
  const unsigned short int Md5::hashBits = MD5_DIGESTBITS;
  // Number of hash unsigned chars
  const unsigned short int Md5::hashUCs = MD5_DIGESTUCHARS;
  // Number of hash unsigned short ints
  const unsigned short int Md5::hashUSs = MD5_DIGESTUSHORTS;
  // Number of hash unsigned long ints
  const unsigned short int Md5::hashULs = MD5_DIGESTULONGS;
 
  //  Encodes input (unsigned long int) into output (BaseCryptoRandomStream). Assumes length is a multiple of 4.
  void Md5::Encode(BaseCryptoRandomStream* output, unsigned long int* input) {
    unsigned long int i, j;
 
    for ( i = 0, j = 0; j < output->GetUCLength(); i++, j += 4 ) {
      output->SetUCPosition(j, (unsigned char)(input[i] & 0xff));
      output->SetUCPosition(j + 1, (unsigned char)((input[i] >> 8) & 0xff));
      output->SetUCPosition(j + 2, (unsigned char)((input[i] >> 16) & 0xff));
      output->SetUCPosition(j + 3, (unsigned char)((input[i] >> 24) & 0xff));
    }
  }
 
  //  Encodes input (unsigned long int) into output (unsigned char). Assumes length is a multiple of 4.
  void Md5::Encode(unsigned char* output, unsigned long int* input, unsigned long int length) {
    unsigned long int i, j;
 
    for ( i = 0, j = 0; j < length; i++, j += 4 ) {
      output[j] = (unsigned char)(input[i] & 0xff);
      output[j + 1] = (unsigned char)((input[i] >> 8) & 0xff);
      output[j + 2] = (unsigned char)((input[i] >> 16) & 0xff);
      output[j + 3] = (unsigned char)((input[i] >> 24) & 0xff);
    }
  }
 
  //  Decodes input (unsigned char) into output (unsigned long int). Assumes length is a multiple of 4.
  void Md5::Decode(unsigned long int* output, unsigned char* input, unsigned long int length) {
    unsigned long int i, j;
 
    for ( i = 0, j = 0; j < length; i++, j += 4 ) {
      output[i] = ((unsigned long int)input[j]) | (((unsigned long int)input[j + 1]) << 8) | (((unsigned long int)input[j + 2]) << 16) | (((unsigned long int)input[j + 3]) << 24);
    }
  }
 
  // MD5 basic transformation. Transforms state based on block.
  void Md5::Md5Transform(unsigned char* block) {
    unsigned long int a, b, c, d;
    unsigned long int x[16];
 
    a = this->state[0];
    b = this->state[1];
    c = this->state[2];
    d = this->state[3];
    Decode (x, block, 64);
    /* Round 1 */
    FF (&a, b, c, d, x[ 0], MD5_S11, 0xd76aa478); /* 1 */
    FF (&d, a, b, c, x[ 1], MD5_S12, 0xe8c7b756); /* 2 */
    FF (&c, d, a, b, x[ 2], MD5_S13, 0x242070db); /* 3 */
    FF (&b, c, d, a, x[ 3], MD5_S14, 0xc1bdceee); /* 4 */
    FF (&a, b, c, d, x[ 4], MD5_S11, 0xf57c0faf); /* 5 */
    FF (&d, a, b, c, x[ 5], MD5_S12, 0x4787c62a); /* 6 */
    FF (&c, d, a, b, x[ 6], MD5_S13, 0xa8304613); /* 7 */
    FF (&b, c, d, a, x[ 7], MD5_S14, 0xfd469501); /* 8 */
    FF (&a, b, c, d, x[ 8], MD5_S11, 0x698098d8); /* 9 */
    FF (&d, a, b, c, x[ 9], MD5_S12, 0x8b44f7af); /* 10 */
    FF (&c, d, a, b, x[10], MD5_S13, 0xffff5bb1); /* 11 */
    FF (&b, c, d, a, x[11], MD5_S14, 0x895cd7be); /* 12 */
    FF (&a, b, c, d, x[12], MD5_S11, 0x6b901122); /* 13 */
    FF (&d, a, b, c, x[13], MD5_S12, 0xfd987193); /* 14 */
    FF (&c, d, a, b, x[14], MD5_S13, 0xa679438e); /* 15 */
    FF (&b, c, d, a, x[15], MD5_S14, 0x49b40821); /* 16 */
 
    /* Round 2 */
    GG (&a, b, c, d, x[ 1], MD5_S21, 0xf61e2562); /* 17 */
    GG (&d, a, b, c, x[ 6], MD5_S22, 0xc040b340); /* 18 */
    GG (&c, d, a, b, x[11], MD5_S23, 0x265e5a51); /* 19 */
    GG (&b, c, d, a, x[ 0], MD5_S24, 0xe9b6c7aa); /* 20 */
    GG (&a, b, c, d, x[ 5], MD5_S21, 0xd62f105d); /* 21 */
    GG (&d, a, b, c, x[10], MD5_S22,  0x2441453); /* 22 */
    GG (&c, d, a, b, x[15], MD5_S23, 0xd8a1e681); /* 23 */
    GG (&b, c, d, a, x[ 4], MD5_S24, 0xe7d3fbc8); /* 24 */
    GG (&a, b, c, d, x[ 9], MD5_S21, 0x21e1cde6); /* 25 */
    GG (&d, a, b, c, x[14], MD5_S22, 0xc33707d6); /* 26 */
    GG (&c, d, a, b, x[ 3], MD5_S23, 0xf4d50d87); /* 27 */
    GG (&b, c, d, a, x[ 8], MD5_S24, 0x455a14ed); /* 28 */
    GG (&a, b, c, d, x[13], MD5_S21, 0xa9e3e905); /* 29 */
    GG (&d, a, b, c, x[ 2], MD5_S22, 0xfcefa3f8); /* 30 */
    GG (&c, d, a, b, x[ 7], MD5_S23, 0x676f02d9); /* 31 */
    GG (&b, c, d, a, x[12], MD5_S24, 0x8d2a4c8a); /* 32 */
  
    /* Round 3 */
    HH (&a, b, c, d, x[ 5], MD5_S31, 0xfffa3942); /* 33 */
    HH (&d, a, b, c, x[ 8], MD5_S32, 0x8771f681); /* 34 */
    HH (&c, d, a, b, x[11], MD5_S33, 0x6d9d6122); /* 35 */
    HH (&b, c, d, a, x[14], MD5_S34, 0xfde5380c); /* 36 */
    HH (&a, b, c, d, x[ 1], MD5_S31, 0xa4beea44); /* 37 */
    HH (&d, a, b, c, x[ 4], MD5_S32, 0x4bdecfa9); /* 38 */
    HH (&c, d, a, b, x[ 7], MD5_S33, 0xf6bb4b60); /* 39 */
    HH (&b, c, d, a, x[10], MD5_S34, 0xbebfbc70); /* 40 */
    HH (&a, b, c, d, x[13], MD5_S31, 0x289b7ec6); /* 41 */
    HH (&d, a, b, c, x[ 0], MD5_S32, 0xeaa127fa); /* 42 */
    HH (&c, d, a, b, x[ 3], MD5_S33, 0xd4ef3085); /* 43 */
    HH (&b, c, d, a, x[ 6], MD5_S34,  0x4881d05); /* 44 */
    HH (&a, b, c, d, x[ 9], MD5_S31, 0xd9d4d039); /* 45 */
    HH (&d, a, b, c, x[12], MD5_S32, 0xe6db99e5); /* 46 */
    HH (&c, d, a, b, x[15], MD5_S33, 0x1fa27cf8); /* 47 */
    HH (&b, c, d, a, x[ 2], MD5_S34, 0xc4ac5665); /* 48 */
 
    /* Round 4 */
    II (&a, b, c, d, x[ 0], MD5_S41, 0xf4292244); /* 49 */
    II (&d, a, b, c, x[ 7], MD5_S42, 0x432aff97); /* 50 */
    II (&c, d, a, b, x[14], MD5_S43, 0xab9423a7); /* 51 */
    II (&b, c, d, a, x[ 5], MD5_S44, 0xfc93a039); /* 52 */
    II (&a, b, c, d, x[12], MD5_S41, 0x655b59c3); /* 53 */
    II (&d, a, b, c, x[ 3], MD5_S42, 0x8f0ccc92); /* 54 */
    II (&c, d, a, b, x[10], MD5_S43, 0xffeff47d); /* 55 */
    II (&b, c, d, a, x[ 1], MD5_S44, 0x85845dd1); /* 56 */
    II (&a, b, c, d, x[ 8], MD5_S41, 0x6fa87e4f); /* 57 */
    II (&d, a, b, c, x[15], MD5_S42, 0xfe2ce6e0); /* 58 */
    II (&c, d, a, b, x[ 6], MD5_S43, 0xa3014314); /* 59 */
    II (&b, c, d, a, x[13], MD5_S44, 0x4e0811a1); /* 60 */
    II (&a, b, c, d, x[ 4], MD5_S41, 0xf7537e82); /* 61 */
    II (&d, a, b, c, x[11], MD5_S42, 0xbd3af235); /* 62 */
    II (&c, d, a, b, x[ 2], MD5_S43, 0x2ad7d2bb); /* 63 */
    II (&b, c, d, a, x[ 9], MD5_S44, 0xeb86d391); /* 64 */
 
    this->state[0] += a;
    this->state[1] += b;
    this->state[2] += c;
    this->state[3] += d;
 
    memset(x, 0, 16);
  }
 
  // F, G, H and I are basic MD5 functions.
  inline unsigned long int Md5::F(unsigned long int x, unsigned long int y, unsigned long int z) {
    return (((x) & (y)) | ((~x) & (z)));
  }
 
  inline unsigned long int Md5::G(unsigned long int x, unsigned long int y, unsigned long int z) {
    return (((x) & (z)) | ((y) & (~z)));
  }
 
  inline unsigned long int Md5::H(unsigned long int x, unsigned long int y, unsigned long int z) {
    return ((x) ^ (y) ^ (z));
  }
 
  inline unsigned long int Md5::I(unsigned long int x, unsigned long int y, unsigned long int z) {
    return ((y) ^ ((x) | (~z)));
  }
 
  // RotateLeft rotates x left n bits.
  inline unsigned long int Md5::RotateLeft(unsigned long int x, unsigned long int n) {
    return (((x) << (n)) | ((x) >> (32-(n))));
  }
 
  //  FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
  // Rotation is separate from addition to prevent recomputation.
  void Md5::FF(unsigned long int* a, unsigned long int b, unsigned long int c, unsigned long int d, unsigned long int  x, unsigned long int s, unsigned long int ac) {
    (*a) += F (b, c, d) + x + (unsigned long int)ac;
    (*a) = RotateLeft ((*a), s);
    (*a) += b;
  }
 
  void Md5::GG(unsigned long int* a, unsigned long int b, unsigned long int c, unsigned long int d, unsigned long int  x, unsigned long int s, unsigned long int ac) {
      (*a) += G (b, c, d) + x + (unsigned long int)ac;
    (*a) = RotateLeft ((*a), s);
    (*a) += b;
  }
 
  void Md5::HH(unsigned long int* a, unsigned long int b, unsigned long int c, unsigned long int d, unsigned long int  x, unsigned long int s, unsigned long int ac) {
    (*a) += H (b, c, d) + x + (unsigned long int)ac;
    (*a) = RotateLeft ((*a), s);
    (*a) += b;
  }
 
  void Md5::II(unsigned long int* a, unsigned long int b, unsigned long int c, unsigned long int d, unsigned long int  x, unsigned long int s, unsigned long int ac) {
    (*a) += I (b, c, d) + x + (unsigned long int)ac;
    (*a) = RotateLeft ((*a), s);
    (*a) += b;
  }
 
  //  MD5 block update operation. Continues an MD5 message-digest
  //  operation, processing another unsigned char message block, 
  //  and updating the context.
  void Md5::Add(unsigned char* stream, unsigned long int length) {
    unsigned long int i, index, partLen;
 
    // Compute number of bytes mod 64
    index = (unsigned long int)((this->count[0] >> 3) & 0x3F);
 
    // Update number of bits
    if ((this->count[0] += ((unsigned long int)length << 3)) < ((unsigned long int)length << 3)) {
      this->count[1]++;
    }
    this->count[1] += ((unsigned long int)length >> 29);
 
    partLen = 64 - index;
 
    // Transform as many times as possible.
    if ( length >= partLen ) {
      memcpy(&buffer[index], stream, partLen);
      this->Md5Transform(this->buffer);
      for ( i = partLen; i + 63 < length; i += 64 ) {
             Md5Transform (&stream[i]);
      }
      index = 0;
    }
    else {
      i = 0;
    }
    // Buffer remaining input
      memcpy (&buffer[index], &stream[i], length - i);
  }
 
  // Constructor, default 
  Md5::Md5() {
 
    this->Initialize();
  }
 
  // Destructor
  Md5::~Md5() {
 
    this->Initialize();
  }
 
  // Initializes common states of Md5 algorithm
  void Md5::Initialize(void) {
  
    this->count[0] = this->count[1] = 0;
      this->state[0] = 0x67452301;
    this->state[1] = 0xefcdab89;
    this->state[2] = 0x98badcfe;
    this->state[3] = 0x10325476;
  }
 
  // Adds the BaseCryptoRandomStream stream to the hash
  void Md5::Add(BaseCryptoRandomStream* stream) {
    unsigned char block[64];
    unsigned long int i, j, index, partLen;
 
    // Compute number of bytes mod 64
    index = (unsigned long int)((this->count[0] >> 3) & 0x3F);
 
    // Update number of bits
    if ((this->count[0] += ((unsigned long int)stream->GetUCLength() << 3)) < ((unsigned long int)stream->GetUCLength() << 3)) {
      this->count[1]++;
    }
    this->count[1] += ((unsigned long int)stream->GetUCLength() >> 29);
 
    partLen = 64 - index;
 
    // Transform as many times as possible.
    if ( stream->GetUCLength() >= partLen ) {
      for ( i = 0; i < partLen; i++ ) {
        this->buffer[index + i] = stream->GetUCPosition(i);
      }
      this->Md5Transform(this->buffer);
      for ( i = partLen; i + 63 < stream->GetUCLength(); i += 64 ) {
        for ( j = 0; j < 64; j++ ) {
          block[j] = stream->GetUCPosition(i + j);
        }
        this->Md5Transform(block);
      }
      index = 0;
    }
    else {
      i = 0;
    }
    // Buffer remaining input
    for ( j = 0; j < (stream->GetUCLength() - i); j++ ) {
      this->buffer[index + j] = stream->GetUCPosition(i + j);
    }
  }
 
  // Finalizes hash
  void Md5::Finalize(void) {
    unsigned char bits[8];
    unsigned char padding[MD5_BUFLENGTH];
    unsigned long int index, padLen;
 
    // Save number of bits
    this->Encode(bits, this->count, 8);
 
    // Pad out to 56 mod 64.
      index = (unsigned long int)((count[0] >> 3) & 0x3f);
    padLen = (index < 56) ? (56 - index) : (120 - index);
    memset (padding, '\0', MD5_BUFLENGTH);
    padding[0] = 0x80;
    this->Add(padding, padLen);
 
    // Append length (before padding)
    this->Add(bits, 8);
    // Store state in digest
    this->Encode(this->messageDigest, state);
  }
 
  // Gets hash length in bits
  unsigned short int Md5::GetBitHashLength(void) {
 
    return this->hashBits;
  }
 
  // Gets hash length in unsigned chars
  unsigned short int Md5::GetUCHashLength(void) {
 
    return this->hashUCs;
  }
 
  // Gets hash length in unsigned short ints
  unsigned short int Md5::GetUSHashLength(void) {
 
    return this->hashUSs;
  }
 
  // Gets hash length in unsigned long ints
  unsigned short int Md5::GetULHashLength(void) {
 
    return this->hashULs;
  }
 
  // Gets the type of the object
  Hashes Md5::GetType(void) {
 
    return this->hashName;
  }
  }
}