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📄 ripemd.cpp

📁 计算机安全的 多种密码算法演示
💻 CPP
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12 
// RIPEMD.cpp: implementation of the CMd5A class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "RIPEMD.h"
#include "msp.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CRIPEMD::CRIPEMD()
{

}

CRIPEMD::~CRIPEMD()
{

}

void CRIPEMD::RIPInit (RIP_CTX *context)    /* context */
{
  context->count[0] = context->count[1] = 0;
  context->state[0] = 0x67452301;    /* Load magic initialization constants.*/
  context->state[1] = 0xefcdab89;
  context->state[2] = 0x98badcfe;
  context->state[3] = 0x10325476;
  context->state[4] = 0xc3d2e1f0;
}


void CRIPEMD::RIPUpdate (RIP_CTX *context, unsigned char *input,unsigned int inputLen  )
{
  unsigned int i, index, partLen;
  index = (unsigned int)((context->count[0] >> 3) & 0x3F);   /* Compute number of bytes mod 64 */

  if ( (context->count[0] += ( (UINT4)inputLen << 3) ) < ( (UINT4)inputLen << 3 ) )
		context->count[1]++;
  
  context->count[1] += ((UINT4)inputLen >> 29);
  partLen = 64 - index;

  /* Transform as many times as possible.*/
  if (inputLen >= partLen) 
  {
	RIP_memcpy( (POINTER)&context->buffer[index], (POINTER)input, partLen);
	RIPTransform (context->state, context->buffer);

	for (i = partLen; i + 63 < inputLen; i += 64)
			RIPTransform (context->state, &input[i]);

	index = 0;
  }
  else
		i = 0;
  /* Buffer remaining input */
  RIP_memcpy( (POINTER)&context->buffer[index], (POINTER)&input[i],inputLen-i );
}

/* 
  RIP finalization. Ends an RIP message-digest operation, writing the
  the message digest and zeroizing the context.
*/
void CRIPEMD::RIPFinal (unsigned char digest[16], RIP_CTX *context)
                /* message digest */      /* context */
{
  unsigned char bits[8];
  unsigned int index, padLen;
  
  Encode (bits, context->count, 8); /* Save number of bits */

  /* Pad out to 56 mod 64.*/
  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
  padLen = (index < 56) ? (56 - index) : (120 - index);
  RIPUpdate (context,(unsigned char*) PADDING, padLen);

  RIPUpdate (context, bits, 8);   /* Append length (before padding) */
  Encode (digest, context->state, 16); /* Store state in digest */

  /* Zeroize sensitive information.*/
  RIP_memset ((POINTER)context, 0, sizeof (*context));
}

/* RIP basic transformation. Transforms state based on block.
 */
void CRIPEMD::RIPTransform (UINT4 state[4],unsigned char block[64])
{
	int i=0;
	UINT4  a1, b1, c1, d1, e1, a2, b2, c2, d2, e2,X[16];
        a1 = a2 = state[0];
        b1 = b2 = state[1];
        c1 = c2 = state[2]; 
        d1 = d2 = state[3];
        e1 = e2 = state[4];

	Decode (X, block, 64);
    Subround(F, a1, b1, c1, d1, e1, X[ 0], 11, k0);
	Subround(F, e1, a1, b1, c1, d1, X[ 1], 14, k0);
	Subround(F, d1, e1, a1, b1, c1, X[ 2], 15, k0);
	Subround(F, c1, d1, e1, a1, b1, X[ 3], 12, k0);
	Subround(F, b1, c1, d1, e1, a1, X[ 4],  5, k0);
	Subround(F, a1, b1, c1, d1, e1, X[ 5],  8, k0);
	Subround(F, e1, a1, b1, c1, d1, X[ 6],  7, k0);
	Subround(F, d1, e1, a1, b1, c1, X[ 7],  9, k0);
	Subround(F, c1, d1, e1, a1, b1, X[ 8], 11, k0);
	Subround(F, b1, c1, d1, e1, a1, X[ 9], 13, k0);
	Subround(F, a1, b1, c1, d1, e1, X[10], 14, k0);
	Subround(F, e1, a1, b1, c1, d1, X[11], 15, k0);
	Subround(F, d1, e1, a1, b1, c1, X[12],  6, k0);
	Subround(F, c1, d1, e1, a1, b1, X[13],  7, k0);
	Subround(F, b1, c1, d1, e1, a1, X[14],  9, k0);
	Subround(F, a1, b1, c1, d1, e1, X[15],  8, k0);

	Subround(G, e1, a1, b1, c1, d1, X[ 7],  7, k1);
	Subround(G, d1, e1, a1, b1, c1, X[ 4],  6, k1);
	Subround(G, c1, d1, e1, a1, b1, X[13],  8, k1);
	Subround(G, b1, c1, d1, e1, a1, X[ 1], 13, k1);
	Subround(G, a1, b1, c1, d1, e1, X[10], 11, k1);
	Subround(G, e1, a1, b1, c1, d1, X[ 6],  9, k1);
	Subround(G, d1, e1, a1, b1, c1, X[15],  7, k1);
	Subround(G, c1, d1, e1, a1, b1, X[ 3], 15, k1);
	Subround(G, b1, c1, d1, e1, a1, X[12],  7, k1);
	Subround(G, a1, b1, c1, d1, e1, X[ 0], 12, k1);
	Subround(G, e1, a1, b1, c1, d1, X[ 9], 15, k1);
	Subround(G, d1, e1, a1, b1, c1, X[ 5],  9, k1);
	Subround(G, c1, d1, e1, a1, b1, X[ 2], 11, k1);
	Subround(G, b1, c1, d1, e1, a1, X[14],  7, k1);
	Subround(G, a1, b1, c1, d1, e1, X[11], 13, k1);
	Subround(G, e1, a1, b1, c1, d1, X[ 8], 12, k1);

	Subround(H, d1, e1, a1, b1, c1, X[ 3], 11, k2);
	Subround(H, c1, d1, e1, a1, b1, X[10], 13, k2);
	Subround(H, b1, c1, d1, e1, a1, X[14],  6, k2);
	Subround(H, a1, b1, c1, d1, e1, X[ 4],  7, k2);
	Subround(H, e1, a1, b1, c1, d1, X[ 9], 14, k2);
	Subround(H, d1, e1, a1, b1, c1, X[15],  9, k2);
	Subround(H, c1, d1, e1, a1, b1, X[ 8], 13, k2);
	Subround(H, b1, c1, d1, e1, a1, X[ 1], 15, k2);
	Subround(H, a1, b1, c1, d1, e1, X[ 2], 14, k2);
	Subround(H, e1, a1, b1, c1, d1, X[ 7],  8, k2);
	Subround(H, d1, e1, a1, b1, c1, X[ 0], 13, k2);
	Subround(H, c1, d1, e1, a1, b1, X[ 6],  6, k2);
	Subround(H, b1, c1, d1, e1, a1, X[13],  5, k2);
	Subround(H, a1, b1, c1, d1, e1, X[11], 12, k2);
	Subround(H, e1, a1, b1, c1, d1, X[ 5],  7, k2);
	Subround(H, d1, e1, a1, b1, c1, X[12],  5, k2);

	Subround(I, c1, d1, e1, a1, b1, X[ 1], 11, k3);
	Subround(I, b1, c1, d1, e1, a1, X[ 9], 12, k3);
	Subround(I, a1, b1, c1, d1, e1, X[11], 14, k3);
	Subround(I, e1, a1, b1, c1, d1, X[10], 15, k3);
	Subround(I, d1, e1, a1, b1, c1, X[ 0], 14, k3);
	Subround(I, c1, d1, e1, a1, b1, X[ 8], 15, k3);
	Subround(I, b1, c1, d1, e1, a1, X[12],  9, k3);
	Subround(I, a1, b1, c1, d1, e1, X[ 4],  8, k3);
	Subround(I, e1, a1, b1, c1, d1, X[13],  9, k3);
	Subround(I, d1, e1, a1, b1, c1, X[ 3], 14, k3);
	Subround(I, c1, d1, e1, a1, b1, X[ 7],  5, k3);
	Subround(I, b1, c1, d1, e1, a1, X[15],  6, k3);
	Subround(I, a1, b1, c1, d1, e1, X[14],  8, k3);
	Subround(I, e1, a1, b1, c1, d1, X[ 5],  6, k3);
	Subround(I, d1, e1, a1, b1, c1, X[ 6],  5, k3);
	Subround(I, c1, d1, e1, a1, b1, X[ 2], 12, k3);

	Subround(J, b1, c1, d1, e1, a1, X[ 4],  9, k4);
	Subround(J, a1, b1, c1, d1, e1, X[ 0], 15, k4);
	Subround(J, e1, a1, b1, c1, d1, X[ 5],  5, k4);
	Subround(J, d1, e1, a1, b1, c1, X[ 9], 11, k4);
	Subround(J, c1, d1, e1, a1, b1, X[ 7],  6, k4);
	Subround(J, b1, c1, d1, e1, a1, X[12],  8, k4);
	Subround(J, a1, b1, c1, d1, e1, X[ 2], 13, k4);
	Subround(J, e1, a1, b1, c1, d1, X[10], 12, k4);
	Subround(J, d1, e1, a1, b1, c1, X[14],  5, k4);
	Subround(J, c1, d1, e1, a1, b1, X[ 1], 12, k4);
	Subround(J, b1, c1, d1, e1, a1, X[ 3], 13, k4);
	Subround(J, a1, b1, c1, d1, e1, X[ 8], 14, k4);
	Subround(J, e1, a1, b1, c1, d1, X[11], 11, k4);
	Subround(J, d1, e1, a1, b1, c1, X[ 6],  8, k4);
	Subround(J, c1, d1, e1, a1, b1, X[15],  5, k4);
	Subround(J, b1, c1, d1, e1, a1, X[13],  6, k4);

	Subround(J, a2, b2, c2, d2, e2, X[ 5],  8, k5);
	Subround(J, e2, a2, b2, c2, d2, X[14],  9, k5);
	Subround(J, d2, e2, a2, b2, c2, X[ 7],  9, k5);
	Subround(J, c2, d2, e2, a2, b2, X[ 0], 11, k5);
	Subround(J, b2, c2, d2, e2, a2, X[ 9], 13, k5);
	Subround(J, a2, b2, c2, d2, e2, X[ 2], 15, k5);
	Subround(J, e2, a2, b2, c2, d2, X[11], 15, k5);
	Subround(J, d2, e2, a2, b2, c2, X[ 4],  5, k5);
	Subround(J, c2, d2, e2, a2, b2, X[13],  7, k5);
	Subround(J, b2, c2, d2, e2, a2, X[ 6],  7, k5);
	Subround(J, a2, b2, c2, d2, e2, X[15],  8, k5);
	Subround(J, e2, a2, b2, c2, d2, X[ 8], 11, k5);
	Subround(J, d2, e2, a2, b2, c2, X[ 1], 14, k5);
	Subround(J, c2, d2, e2, a2, b2, X[10], 14, k5);
	Subround(J, b2, c2, d2, e2, a2, X[ 3], 12, k5);
	Subround(J, a2, b2, c2, d2, e2, X[12],  6, k5);

	Subround(I, e2, a2, b2, c2, d2, X[ 6],  9, k6); 
	Subround(I, d2, e2, a2, b2, c2, X[11], 13, k6);
	Subround(I, c2, d2, e2, a2, b2, X[ 3], 15, k6);
	Subround(I, b2, c2, d2, e2, a2, X[ 7],  7, k6);
	Subround(I, a2, b2, c2, d2, e2, X[ 0], 12, k6);
	Subround(I, e2, a2, b2, c2, d2, X[13],  8, k6);
	Subround(I, d2, e2, a2, b2, c2, X[ 5],  9, k6);
	Subround(I, c2, d2, e2, a2, b2, X[10], 11, k6);
	Subround(I, b2, c2, d2, e2, a2, X[14],  7, k6);
	Subround(I, a2, b2, c2, d2, e2, X[15],  7, k6);
	Subround(I, e2, a2, b2, c2, d2, X[ 8], 12, k6);
	Subround(I, d2, e2, a2, b2, c2, X[12],  7, k6);
	Subround(I, c2, d2, e2, a2, b2, X[ 4],  6, k6);
	Subround(I, b2, c2, d2, e2, a2, X[ 9], 15, k6);
	Subround(I, a2, b2, c2, d2, e2, X[ 1], 13, k6);
	Subround(I, e2, a2, b2, c2, d2, X[ 2], 11, k6);

	Subround(H, d2, e2, a2, b2, c2, X[15],  9, k7);
	Subround(H, c2, d2, e2, a2, b2, X[ 5],  7, k7);
	Subround(H, b2, c2, d2, e2, a2, X[ 1], 15, k7);
	Subround(H, a2, b2, c2, d2, e2, X[ 3], 11, k7);
	Subround(H, e2, a2, b2, c2, d2, X[ 7],  8, k7);
	Subround(H, d2, e2, a2, b2, c2, X[14],  6, k7);
	Subround(H, c2, d2, e2, a2, b2, X[ 6],  6, k7);
	Subround(H, b2, c2, d2, e2, a2, X[ 9], 14, k7);
	Subround(H, a2, b2, c2, d2, e2, X[11], 12, k7);
	Subround(H, e2, a2, b2, c2, d2, X[ 8], 13, k7);
	Subround(H, d2, e2, a2, b2, c2, X[12],  5, k7);
	Subround(H, c2, d2, e2, a2, b2, X[ 2], 14, k7);
	Subround(H, b2, c2, d2, e2, a2, X[10], 13, k7);
12

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