/* MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context.
*/
void MD5Final (rho::u8 digest[16], MD5_CTX *context)
// digest[16]; /* message digest */
// context; /* context */
{
rho::u8 bits[8];
rho::u32 index, padLen;
/* Save number of bits */
Encode (bits, context->count, 8);
/* Pad out to 56 mod 64.
*/
index = (rho::u32)((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
MD5Update (context, PADDING, padLen);
/* Append length (before padding) */
MD5Update (context, bits, 8);
/* Store state in digest */
Encode (digest, context->state, 16);
/* Zeroize sensitive information.
*/
MD5_memset ((POINTER)context, 0, sizeof (*context));
}
//初始化
void CMD5::MD5Init()
{
count[0]=0;
count[1]=0;
state[0]=0x67452301;
state[1]=0xefcdab89;
state[2]=0x98badcfe;
state[3]=0x10325476;
MD5_memset(PADDING,0,sizeof(PADDING));
*PADDING=0x80;
return;
}
//最终结果
void CMD5::MD5Final(unsigned char digest[16])
{
unsigned char bits[8];
unsigned int index,padLen;
Encode(bits,count,8);
index=(unsigned int)((count[0]>>3)&0x3f);
padLen=(index<56)?(56-index):(120-index);
MD5Update( PADDING,padLen);
MD5Update(bits,8);
Encode(digest,state,16);
MD5_memset((unsigned char*)this,0,sizeof (*this));
MD5Init();
return;
}
/* MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context.
*/
static kvoid MD5Final (kuchar digest[16], MD5_CTX *context)
{
kuchar bits[8];
kuint index, padLen;
/* Save number of bits */
Encode (bits, context->count, 8);
/* Pad out to 56 mod 64.
*/
index = (kuint)((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
MD5Update (context, PADDING, (kuint)padLen);
/* Append length (before padding) */
MD5Update (context, bits, 8);
/* Store state in digest */
Encode (digest, context->state, 16);
/* Zeroize sensitive information.
*/
MD5_memset ((POINTER)context, 0, sizeof (*context));
}
//转换函数
void CMD5::MD5Transform(unsigned long int state[4], unsigned char block[64])
{
unsigned long int a=state[0],b=state[1],c=state[2],d=state[3],x[16];
Decode(x,block,64);
FF(a,b,c,d,x[ 0],S11,0xd76aa478); /* 1 */
FF(d,a,b,c,x[ 1],S12,0xe8c7b756); /* 2 */
FF(c,d,a,b,x[ 2],S13,0x242070db); /* 3 */
FF(b,c,d,a,x[ 3],S14,0xc1bdceee); /* 4 */
FF(a,b,c,d,x[ 4],S11,0xf57c0faf); /* 5 */
FF(d,a,b,c,x[ 5],S12,0x4787c62a); /* 6 */
FF(c,d,a,b,x[ 6],S13,0xa8304613); /* 7 */
FF(b,c,d,a,x[ 7],S14,0xfd469501); /* 8 */
FF(a,b,c,d,x[ 8],S11,0x698098d8); /* 9 */
FF(d,a,b,c,x[ 9],S12,0x8b44f7af); /* 10 */
FF(c,d,a,b,x[10],S13,0xffff5bb1); /* 11 */
FF(b,c,d,a,x[11],S14,0x895cd7be); /* 12 */
FF(a,b,c,d,x[12],S11,0x6b901122); /* 13 */
FF(d,a,b,c,x[13],S12,0xfd987193); /* 14 */
FF(c,d,a,b,x[14],S13,0xa679438e); /* 15 */
FF(b,c,d,a,x[15],S14,0x49b40821); /* 16 */
GG(a,b,c,d,x[ 1],S21,0xf61e2562); /* 17 */
GG(d,a,b,c,x[ 6],S22,0xc040b340); /* 18 */
GG(c,d,a,b,x[11],S23,0x265e5a51); /* 19 */
GG(b,c,d,a,x[ 0],S24,0xe9b6c7aa); /* 20 */
GG(a,b,c,d,x[ 5],S21,0xd62f105d); /* 21 */
GG(d,a,b,c,x[10],S22,0x2441453); /* 22 */
GG(c,d,a,b,x[15],S23,0xd8a1e681); /* 23 */
GG(b,c,d,a,x[ 4],S24,0xe7d3fbc8); /* 24 */
GG(a,b,c,d,x[ 9],S21,0x21e1cde6); /* 25 */
GG(d,a,b,c,x[14],S22,0xc33707d6); /* 26 */
GG(c,d,a,b,x[ 3],S23,0xf4d50d87); /* 27 */
GG(b,c,d,a,x[ 8],S24,0x455a14ed); /* 28 */
GG(a,b,c,d,x[13],S21,0xa9e3e905); /* 29 */
GG(d,a,b,c,x[ 2],S22,0xfcefa3f8); /* 30 */
GG(c,d,a,b,x[ 7],S23,0x676f02d9); /* 31 */
GG(b,c,d,a,x[12],S24,0x8d2a4c8a); /* 32 */
HH(a,b,c,d,x[ 5],S31,0xfffa3942); /* 33 */
HH(d,a,b,c,x[ 8],S32,0x8771f681); /* 34 */
HH(c,d,a,b,x[11],S33,0x6d9d6122); /* 35 */
HH(b,c,d,a,x[14],S34,0xfde5380c); /* 36 */
HH(a,b,c,d,x[ 1],S31,0xa4beea44); /* 37 */
HH(d,a,b,c,x[ 4],S32,0x4bdecfa9); /* 38 */
HH(c,d,a,b,x[ 7],S33,0xf6bb4b60); /* 39 */
HH(b,c,d,a,x[10],S34,0xbebfbc70); /* 40 */
HH(a,b,c,d,x[13],S31,0x289b7ec6); /* 41 */
HH(d,a,b,c,x[ 0],S32,0xeaa127fa); /* 42 */
HH(c,d,a,b,x[ 3],S33,0xd4ef3085); /* 43 */
HH(b,c,d,a,x[ 6],S34,0x4881d05); /* 44 */
HH(a,b,c,d,x[ 9],S31,0xd9d4d039); /* 45 */
HH(d,a,b,c,x[12],S32,0xe6db99e5); /* 46 */
HH(c,d,a,b,x[15],S33,0x1fa27cf8); /* 47 */
HH(b,c,d,a,x[ 2],S34,0xc4ac5665); /* 48 */
II(a,b,c,d,x[ 0],S41,0xf4292244); /* 49 */
II(d,a,b,c,x[ 7],S42,0x432aff97); /* 50 */
II(c,d,a,b,x[14],S43,0xab9423a7); /* 51 */
II(b,c,d,a,x[ 5],S44,0xfc93a039); /* 52 */
II(a,b,c,d,x[12],S41,0x655b59c3); /* 53 */
II(d,a,b,c,x[ 3],S42,0x8f0ccc92); /* 54 */
II(c,d,a,b,x[10],S43,0xffeff47d); /* 55 */
II(b,c,d,a,x[ 1],S44,0x85845dd1); /* 56 */
II(a,b,c,d,x[ 8],S41,0x6fa87e4f); /* 57 */
II(d,a,b,c,x[15],S42,0xfe2ce6e0); /* 58 */
II(c,d,a,b,x[ 6],S43,0xa3014314); /* 59 */
II(b,c,d,a,x[13],S44,0x4e0811a1); /* 60 */
II(a,b,c,d,x[ 4],S41,0xf7537e82); /* 61 */
II(d,a,b,c,x[11],S42,0xbd3af235); /* 62 */
II(c,d,a,b,x[ 2],S43,0x2ad7d2bb); /* 63 */
II(b,c,d,a,x[ 9],S44,0xeb86d391); /* 64 */
state[0]+=a;
state[1]+=b;
state[2]+=c;
state[3]+=d;
MD5_memset((unsigned char *)x,0,sizeof(x));
return;
}