md5.cpp
资源名称:00011511.rar [点击查看]
上传用户:xiuanze55
上传日期:2017-08-03
资源大小:1080k
文件大小:9k
源码类别:
Delphi控件源码
开发平台:
Delphi
- /////////////////////////////////////////////////////////////////////////
- // MD5.cpp
- // Implementation file for MD5 class
- //
- // This C++ Class implementation of the original RSA Data Security, Inc.
- // MD5 Message-Digest Algorithm is copyright (c) 2002, Gary McNickle.
- // All rights reserved. This software is a derivative of the "RSA Data
- // Security, Inc. MD5 Message-Digest Algorithm"
- //
- // You may use this software free of any charge, but without any
- // warranty or implied warranty, provided that you follow the terms
- // of the original RSA copyright, listed below.
- //
- // Original RSA Data Security, Inc. Copyright notice
- /////////////////////////////////////////////////////////////////////////
- //
- // Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
- // rights reserved.
- //
- // License to copy and use this software is granted provided that it
- // is identified as the "RSA Data Security, Inc. MD5 Message-Digest
- // Algorithm" in all material mentioning or referencing this software
- // or this function.
- // License is also granted to make and use derivative works provided
- // that such works are identified as "derived from the RSA Data
- // Security, Inc. MD5 Message-Digest Algorithm" in all material
- // mentioning or referencing the derived work.
- // RSA Data Security, Inc. makes no representations concerning either
- // the merchantability of this software or the suitability of this
- // software for any particular purpose. It is provided "as is"
- // without express or implied warranty of any kind.
- // These notices must be retained in any copies of any part of this
- // documentation and/or software.
- /////////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include <assert.h>
- #include <memory.h>
- #include <stdio.h>
- #include <string.h>
- #include "md5.h"
- static unsigned char PADDING[64] =
- {
- 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- #define S11 7
- #define S12 12
- #define S13 17
- #define S14 22
- #define S21 5
- #define S22 9
- #define S23 14
- #define S24 20
- #define S31 4
- #define S32 11
- #define S33 16
- #define S34 23
- #define S41 6
- #define S42 10
- #define S43 15
- #define S44 21
- // PrintMD5: Converts a completed md5 digest into a char* string.
- char* PrintMD5(uchar md5Digest[16])
- {
- char chBuffer[256];
- char chEach[10];
- int nCount;
- memset(chBuffer,0,256);
- memset(chEach, 0, 10);
- for (nCount = 0; nCount < 16; nCount++)
- {
- sprintf(chEach, "%02x", md5Digest[nCount]);
- strncat(chBuffer, chEach, sizeof(chEach));
- }
- return strdup(chBuffer);
- }
- // MD5String: Performs the MD5 algorithm on a char* string, returning
- // the results as a char*.
- char* MD5String(char* szString)
- {
- int nLen = strlen(szString);
- md5 alg;
- alg.Update((unsigned char*)szString, (unsigned int)nLen);
- alg.Finalize();
- return PrintMD5(alg.Digest());
- }
- // MD5File: Performs the MD5 algorithm on a file (binar or text),
- // returning the results as a char*. Returns NULL if it fails.
- char* MD5File(char* szFilename)
- {
- FILE* file;
- md5 alg;
- int nLen;
- unsigned char chBuffer[1024];
- try
- {
- memset(chBuffer, 0, 1024);
- if ((file = fopen (szFilename, "rb")) != NULL)
- {
- while (nLen = fread (chBuffer, 1, 1024, file))
- alg.Update(chBuffer, nLen);
- alg.Finalize();
- fclose (file);
- return PrintMD5(alg.Digest());
- }
- }
- catch(...)
- {
- }
- return NULL; // failed
- }
- // md5::Init
- // Initializes a new context.
- void md5::Init()
- {
- memset(m_Count, 0, 2 * sizeof(uint4));
- m_State[0] = 0x67452301;
- m_State[1] = 0xefcdab89;
- m_State[2] = 0x98badcfe;
- m_State[3] = 0x10325476;
- }
- // md5::Update
- // MD5 block update operation. Continues an MD5 message-digest
- // operation, processing another message block, and updating the
- // context.
- void md5::Update(uchar* chInput, uint4 nInputLen)
- {
- uint4 i, index, partLen;
- // Compute number of bytes mod 64
- index = (unsigned int)((m_Count[0] >> 3) & 0x3F);
- // Update number of bits
- if ((m_Count[0] += (nInputLen << 3)) < (nInputLen << 3))
- m_Count[1]++;
- m_Count[1] += (nInputLen >> 29);
- partLen = 64 - index;
- // Transform as many times as possible.
- if (nInputLen >= partLen)
- {
- memcpy( &m_Buffer[index], chInput, partLen );
- Transform(m_Buffer);
- for (i = partLen; i + 63 < nInputLen; i += 64)
- Transform(&chInput[i]);
- index = 0;
- }
- else
- i = 0;
- // Buffer remaining input
- memcpy( &m_Buffer[index], &chInput[i], nInputLen-i );
- }
- // md5::Finalize
- // MD5 finalization. Ends an MD5 message-digest operation, writing
- // the message digest and zeroizing the context.
- void md5::Finalize()
- {
- uchar bits[8];
- uint4 index, padLen;
- // Save number of bits
- Encode (bits, m_Count, 8);
- // Pad out to 56 mod 64
- index = (unsigned int)((m_Count[0] >> 3) & 0x3f);
- padLen = (index < 56) ? (56 - index) : (120 - index);
- Update(PADDING, padLen);
- // Append length (before padding)
- Update (bits, 8);
- // Store state in digest
- Encode (m_Digest, m_State, 16);
- memset(m_Count, 0, 2 * sizeof(uint4));
- memset(m_State, 0, 4 * sizeof(uint4));
- memset(m_Buffer,0, 64 * sizeof(uchar));
- }
- // md5::Transform
- // MD5 basic transformation. Transforms state based on block.
- void md5::Transform (uchar* block)
- {
- uint4 a = m_State[0], b = m_State[1], c = m_State[2], d = m_State[3], x[16];
- Decode (x, block, 64);
- // Round 1
- FF (a, b, c, d, x[ 0], S11, 0xd76aa478);
- FF (d, a, b, c, x[ 1], S12, 0xe8c7b756);
- FF (c, d, a, b, x[ 2], S13, 0x242070db);
- FF (b, c, d, a, x[ 3], S14, 0xc1bdceee);
- FF (a, b, c, d, x[ 4], S11, 0xf57c0faf);
- FF (d, a, b, c, x[ 5], S12, 0x4787c62a);
- FF (c, d, a, b, x[ 6], S13, 0xa8304613);
- FF (b, c, d, a, x[ 7], S14, 0xfd469501);
- FF (a, b, c, d, x[ 8], S11, 0x698098d8);
- FF (d, a, b, c, x[ 9], S12, 0x8b44f7af);
- FF (c, d, a, b, x[10], S13, 0xffff5bb1);
- FF (b, c, d, a, x[11], S14, 0x895cd7be);
- FF (a, b, c, d, x[12], S11, 0x6b901122);
- FF (d, a, b, c, x[13], S12, 0xfd987193);
- FF (c, d, a, b, x[14], S13, 0xa679438e);
- FF (b, c, d, a, x[15], S14, 0x49b40821);
- // Round 2
- GG (a, b, c, d, x[ 1], S21, 0xf61e2562);
- GG (d, a, b, c, x[ 6], S22, 0xc040b340);
- GG (c, d, a, b, x[11], S23, 0x265e5a51);
- GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa);
- GG (a, b, c, d, x[ 5], S21, 0xd62f105d);
- GG (d, a, b, c, x[10], S22, 0x2441453);
- GG (c, d, a, b, x[15], S23, 0xd8a1e681);
- GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8);
- GG (a, b, c, d, x[ 9], S21, 0x21e1cde6);
- GG (d, a, b, c, x[14], S22, 0xc33707d6);
- GG (c, d, a, b, x[ 3], S23, 0xf4d50d87);
- GG (b, c, d, a, x[ 8], S24, 0x455a14ed);
- GG (a, b, c, d, x[13], S21, 0xa9e3e905);
- GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8);
- GG (c, d, a, b, x[ 7], S23, 0x676f02d9);
- GG (b, c, d, a, x[12], S24, 0x8d2a4c8a);
- // Round 3
- HH (a, b, c, d, x[ 5], S31, 0xfffa3942);
- HH (d, a, b, c, x[ 8], S32, 0x8771f681);
- HH (c, d, a, b, x[11], S33, 0x6d9d6122);
- HH (b, c, d, a, x[14], S34, 0xfde5380c);
- HH (a, b, c, d, x[ 1], S31, 0xa4beea44);
- HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9);
- HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60);
- HH (b, c, d, a, x[10], S34, 0xbebfbc70);
- HH (a, b, c, d, x[13], S31, 0x289b7ec6);
- HH (d, a, b, c, x[ 0], S32, 0xeaa127fa);
- HH (c, d, a, b, x[ 3], S33, 0xd4ef3085);
- HH (b, c, d, a, x[ 6], S34, 0x4881d05);
- HH (a, b, c, d, x[ 9], S31, 0xd9d4d039);
- HH (d, a, b, c, x[12], S32, 0xe6db99e5);
- HH (c, d, a, b, x[15], S33, 0x1fa27cf8);
- HH (b, c, d, a, x[ 2], S34, 0xc4ac5665);
- // Round 4
- II (a, b, c, d, x[ 0], S41, 0xf4292244);
- II (d, a, b, c, x[ 7], S42, 0x432aff97);
- II (c, d, a, b, x[14], S43, 0xab9423a7);
- II (b, c, d, a, x[ 5], S44, 0xfc93a039);
- II (a, b, c, d, x[12], S41, 0x655b59c3);
- II (d, a, b, c, x[ 3], S42, 0x8f0ccc92);
- II (c, d, a, b, x[10], S43, 0xffeff47d);
- II (b, c, d, a, x[ 1], S44, 0x85845dd1);
- II (a, b, c, d, x[ 8], S41, 0x6fa87e4f);
- II (d, a, b, c, x[15], S42, 0xfe2ce6e0);
- II (c, d, a, b, x[ 6], S43, 0xa3014314);
- II (b, c, d, a, x[13], S44, 0x4e0811a1);
- II (a, b, c, d, x[ 4], S41, 0xf7537e82);
- II (d, a, b, c, x[11], S42, 0xbd3af235);
- II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb);
- II (b, c, d, a, x[ 9], S44, 0xeb86d391);
- m_State[0] += a;
- m_State[1] += b;
- m_State[2] += c;
- m_State[3] += d;
- memset(x, 0, sizeof(x));
- }
- // md5::Encode
- // Encodes input (uint4) into output (uchar). Assumes nLength is
- // a multiple of 4.
- void md5::Encode(uchar* dest, uint4* src, uint4 nLength)
- {
- uint4 i, j;
- assert(nLength % 4 == 0);
- for (i = 0, j = 0; j < nLength; i++, j += 4)
- {
- dest[j] = (uchar)(src[i] & 0xff);
- dest[j+1] = (uchar)((src[i] >> 8) & 0xff);
- dest[j+2] = (uchar)((src[i] >> 16) & 0xff);
- dest[j+3] = (uchar)((src[i] >> 24) & 0xff);
- }
- }
- // md5::Decode
- // Decodes input (uchar) into output (uint4). Assumes nLength is
- // a multiple of 4.
- void md5::Decode(uint4* dest, uchar* src, uint4 nLength)
- {
- uint4 i, j;
- assert(nLength % 4 == 0);
- for (i = 0, j = 0; j < nLength; i++, j += 4)
- {
- dest[i] = ((uint4)src[j]) | (((uint4)src[j+1])<<8) |
- (((uint4)src[j+2])<<16) | (((uint4)src[j+3])<<24);
- }
- }