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楼主: leesoft

[源码] 认识Lvc跨平台语言——Lvc语言md5算法源代码

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发表于 2006-11-20 23:33:20 | 显示全部楼层
自己改跳转地址嘛,搜搜那些gg的文章吧
 楼主| 发表于 2006-11-20 23:45:52 | 显示全部楼层
没用!
这是Lvc!
发表于 2006-11-21 18:15:18 | 显示全部楼层
Lvc 是把ansi c源代码编译成RISC伪指令再解释执行的嘛~
这样的话跳转地址肯定是写在RAM中的,就算不是写在函数数据区的前五个字节,也可以在其它地方嘛
 楼主| 发表于 2006-11-21 19:14:45 | 显示全部楼层
不是伪指令,是虚指令
也不是解释执行,而是虚拟执行
Lvc是专门为了执行c而设计的虚拟指令集,所以Lvc是与c捆绑的。虽然理论上也可以把pascal一类的东西编译为Lvc虚拟指令,但是肯定无法发挥Lvc指令集的最大效力。
 楼主| 发表于 2006-11-21 19:16:51 | 显示全部楼层
我希望大家用规范的方法写程序,这样才能保证最大限度的稳定性,适用性
发表于 2007-3-25 13:13:08 | 显示全部楼层
Lee太好了
发表于 2007-3-30 07:30:55 | 显示全部楼层
深奥,有点不明白
 楼主| 发表于 2006-10-5 07:36:32 | 显示全部楼层 |阅读模式
下面代码在Lvc平台编译通过,在vc编译通过
通过下面代码大家可以认识到Lvc语言与c语言极高的兼容度
  1. typedef unsigned char *POINTER;
  2. typedef unsigned short int UINT2;
  3. typedef unsigned long int UINT4;
  4. /* MD5 context. */
  5. typedef struct {
  6.   UINT4 state[4];                        /* state (ABCD) */
  7.   UINT4 count[2];      /* number of bits, modulo 2^64 (lsb first) */
  8.   unsigned char buffer[64];                 /* input buffer */
  9. } MD5_CTX;
  10. #define S11 7
  11. #define S12 12
  12. #define S13 17
  13. #define S14 22
  14. #define S21 5
  15. #define S22 9
  16. #define S23 14
  17. #define S24 20
  18. #define S31 4
  19. #define S32 11
  20. #define S33 16
  21. #define S34 23
  22. #define S41 6
  23. #define S42 10
  24. #define S43 15
  25. #define S44 21
  26. void MD5Init(MD5_CTX *);
  27. void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
  28. void MD5Final(unsigned char [16], MD5_CTX *);
  29. static void MD5Transform(UINT4 [4], unsigned char [64]);
  30. static void Encode(unsigned char *, UINT4 *, unsigned int);
  31. static void Decode(UINT4 *, unsigned char *, unsigned int);
  32. static void MD5_memcpy(POINTER, POINTER, unsigned int);
  33. static void MD5_memset(POINTER, int, unsigned int);
  34. static unsigned char PADDING[64] = {
  35.   0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  36.   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  37.   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  38. };
  39. /* F, G, H and I are basic MD5 functions.*/
  40. #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
  41. #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
  42. #define H(x, y, z) ((x) ^ (y) ^ (z))
  43. #define I(x, y, z) ((y) ^ ((x) | (~z)))
  44. /* ROTATE_LEFT rotates x left n bits.*/
  45. #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
  46. /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
  47. Rotation is separate from addition to prevent recomputation.
  48. */
  49. #define FF(a, b, c, d, x, s, ac) { \
  50. (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
  51. (a) = ROTATE_LEFT ((a), (s)); \
  52. (a) += (b); \
  53.   }
  54. #define GG(a, b, c, d, x, s, ac) { \
  55. (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
  56. (a) = ROTATE_LEFT ((a), (s)); \
  57. (a) += (b); \
  58.   }
  59. #define HH(a, b, c, d, x, s, ac) { \
  60. (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
  61. (a) = ROTATE_LEFT ((a), (s)); \
  62. (a) += (b); \
  63.   }
  64. #define II(a, b, c, d, x, s, ac) { \
  65. (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
  66. (a) = ROTATE_LEFT ((a), (s)); \
  67. (a) += (b); \
  68.   }
  69. /* MD5 initialization. Begins an MD5 operation, writing a new context.*/
  70. void MD5Init(MD5_CTX *context)
  71. {
  72.    context->count[0] = context->count[1] = 0;
  73.    /* Load magic initialization constants.*/
  74.    context->state[0] = 0x67452301;
  75.    context->state[1] = 0xefcdab89;
  76.    context->state[2] = 0x98badcfe;
  77.    context->state[3] = 0x10325476;
  78. }
  79. /* MD5 block update operation. Continues an MD5 message-digest
  80.   operation, processing another message block, and updating the
  81.   context.
  82. */
  83. void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen)
  84. {
  85.    unsigned int i, index, partLen;
  86.    /* Compute number of bytes mod 64 */
  87.    index = (unsigned int)((context->count[0] >> 3) & 0x3F);
  88.    /* Update number of bits */
  89.    if ((context->count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3))
  90.       context->count[1]++;
  91.    context->count[1] += ((UINT4)inputLen >> 29);
  92.    partLen = 64 - index;
  93.    /* Transform as many times as possible.*/
  94.    if (inputLen >= partLen) {
  95.       MD5_memcpy((POINTER)&context->buffer[index], (POINTER)input, partLen);
  96.       MD5Transform(context->state, context->buffer);
  97.       for (i = partLen; i + 63 < inputLen; i += 64)
  98.         MD5Transform(context->state, &input[i]);
  99.       index = 0;
  100.    } else
  101.       i = 0;
  102.    /* Buffer remaining input */
  103.    MD5_memcpy((POINTER)&context->buffer[index], (POINTER)&input[i],inputLen-i);
  104. }
  105. /* MD5 finalization. Ends an MD5 message-digest operation, writing the
  106.   the message digest and zeroizing the context.
  107. */
  108. void MD5Final(unsigned char digest[16], MD5_CTX *context)
  109. {
  110.    unsigned char bits[8];
  111.    unsigned int index, padLen;
  112.    /* Save number of bits */
  113.    Encode(bits, context->count, 8);
  114.    /* Pad out to 56 mod 64.*/
  115.    index = (unsigned int)((context->count[0] >> 3) & 0x3f);
  116.    padLen = (index < 56) ? (56 - index) : (120 - index);
  117.    MD5Update(context, PADDING, padLen);
  118.    /* Append length (before padding) */
  119.    MD5Update(context, bits, 8);
  120.    /* Store state in digest */
  121.    Encode(digest, context->state, 16);
  122.    /* Zeroize sensitive information.*/
  123.    MD5_memset((POINTER)context, 0, sizeof (*context));
  124. }
  125. /* MD5 basic transformation. Transforms state based on block.*/
  126. static void MD5Transform(UINT4 state[4], unsigned char block[64])
  127. {
  128.    UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
  129.    
  130.    Decode (x, block, 64);
  131.    
  132.    /* Round 1 */
  133.    FF(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
  134.    FF(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
  135.    FF(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
  136.    FF(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
  137.    FF(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
  138.    FF(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
  139.    FF(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
  140.    FF(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
  141.    FF(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
  142.    FF(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
  143.    FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
  144.    FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
  145.    FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
  146.    FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
  147.    FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
  148.    FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
  149.    
  150.    /* Round 2 */
  151.    GG(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
  152.    GG(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
  153.    GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
  154.    GG(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
  155.    GG(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
  156.    GG(d, a, b, c, x[10], S22,  0x2441453); /* 22 */
  157.    GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
  158.    GG(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
  159.    GG(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
  160.    GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
  161.    GG(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
  162.    GG(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
  163.    GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
  164.    GG(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
  165.    GG(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
  166.    GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
  167.    
  168.    /* Round 3 */
  169.    HH(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
  170.    HH(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
  171.    HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
  172.    HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
  173.    HH(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
  174.    HH(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
  175.    HH(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
  176.    HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
  177.    HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
  178.    HH(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
  179.    HH(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
  180.    HH(b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
  181.    HH(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
  182.    HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
  183.    HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
  184.    HH(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
  185.    
  186.    /* Round 4 */
  187.    II(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
  188.    II(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
  189.    II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
  190.    II(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
  191.    II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
  192.    II(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
  193.    II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
  194.    II(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
  195.    II(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
  196.    II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
  197.    II(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
  198.    II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
  199.    II(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
  200.    II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
  201.    II(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
  202.    II(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
  203.    
  204.    state[0] += a;
  205.    state[1] += b;
  206.    state[2] += c;
  207.    state[3] += d;
  208.    
  209.    /* Zeroize sensitive information.*/
  210.    MD5_memset((POINTER)x, 0, sizeof (x));
  211. }
  212. /* Encodes input (UINT4) into output (unsigned char). Assumes len is
  213.   a multiple of 4.
  214. */
  215. static void Encode(unsigned char *output, UINT4 *input, unsigned int len)
  216. {
  217.    unsigned int i, j;
  218.    for (i = 0, j = 0; j < len; i++, j += 4) {
  219.       output[j] = (unsigned char)(input[i] & 0xff);
  220.       output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
  221.       output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
  222.       output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
  223.    }
  224. }
  225. /* Decodes input (unsigned char) into output (UINT4). Assumes len is
  226.   a multiple of 4.
  227. */
  228. static void Decode(UINT4 *output, unsigned char *input, unsigned int len)
  229. {
  230.    unsigned int i, j;
  231.    for (i = 0, j = 0; j < len; i++, j += 4)
  232.       output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
  233.         (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
  234. }
  235. /* Note: Replace "for loop" with standard memcpy if possible.*/
  236. static void MD5_memcpy(POINTER output, POINTER input, unsigned int len)
  237. {
  238.    unsigned int i;
  239.    for (i = 0; i < len; i++)
  240.       output[i] = input[i];
  241. }
  242. /* Note: Replace "for loop" with standard memset if possible.*/
  243. static void MD5_memset(POINTER output, int value, unsigned int len)
  244. {
  245.    unsigned int i;
  246.    for (i = 0; i < len; i++)
  247.       ((char *)output)[i] = (char)value;
  248. }
  249. #include <stdio.h>
  250. #include <string.h>
  251. static void MDPrint(unsigned char [16]);
  252. #define MD 5
  253. #define MD_CTX MD5_CTX
  254. #define MDInit MD5Init
  255. #define MDUpdate MD5Update
  256. #define MDFinal MD5Final
  257. /* Digests a string and prints the result.*/
  258. static void MDString(char *string)
  259. {
  260.    MD_CTX context;
  261.    unsigned char digest[16];
  262.    unsigned int len = strlen (string);
  263.    
  264.    MDInit(&context);
  265.    MDUpdate(&context, string, len);
  266.    MDFinal(digest, &context);
  267.    
  268.    printf("MD%d ("%s") = ", MD, string);
  269.    MDPrint(digest);
  270.    printf("\n");
  271. }
  272. /* Prints a message digest in hexadecimal.*/
  273. static void MDPrint(unsigned char digest[16])
  274. {
  275.    unsigned int i;
  276.    for (i = 0; i < 16; i++)
  277.       printf ("%02x", digest[i]);
  278. }
  279. int main()  
  280. {
  281.    MDString("Lee");
  282.    printf("OK");
  283.    getchar();
  284. }
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