md5.h檔案主要是定義了md5演算法中用到的一些引數型別，直接拿走即可。在這個演算法中他的時間戳除以了5，也就是說你的真實使用者名稱過5s就變乙個，閃訊最坑的是真實使用者名稱的0-1位字元，我相信許多人知道真實使用者名稱都想用cmd手動撥號了，但正是這兩位字元，你無論如何用手動的方法都撥不出去。
附上c的源**
typedef unsigned long uint4;
typedef long int4;
#define _uint4_t
typedef struct md5_ctx;
typedef unsigned char
byte;
static
void transform(uint4 *buf, uint4 *in);
static unsigned char padding[64] = ;
/* f, g, h and i are basic md5 functions */
#define f(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define g(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define h(x, y, z) ((x) ^ (y) ^ (z))
#define i(x, y, z) ((y) ^ ((x) | (~z)))
/* rotate_left rotates x left n bits */
#define rotate_left(x, n) (((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 */
#define ff(a, b, c, d, x, s, ac) \
#define gg(a, b, c, d, x, s, ac) \
#define hh(a, b, c, d, x, s, ac) \
#define ii(a, b, c, d, x, s, ac) \
#ifdef __stdc__
#define ul(x) x##u
#else
#define ul(x) x
#endif
/* the routine md5_init initializes the message-digest context
mdcontext. all fields are set to zero.
*/void md5_init(md5_ctx *mdcontext)
/* the routine md5update updates the message-digest context to
account for the presence of each of the characters inbuf[0..inlen-1]
in the message whose digest is being computed.
*/void md5_update(md5_ctx *mdcontext, unsigned char *inbuf, unsigned int inlen)
}}/* the routine md5final terminates the message-digest computation and
ends with the desired message digest in mdcontext->digest[0...15].
*/void md5_final(unsigned char hash, md5_ctx *mdcontext)
memcpy(hash, mdcontext->digest, 16);
}/* basic md5 step. transforms buf based on in.
*/static
void transform(uint4 *buf, uint4 *in)
void connect(int pppoenumber, int username_1, int username_2, int username_3, int userpassward_1, int userpassward_2)
; byte md501h[2];
char *md501 = (char *)malloc(sizeof(unsigned char) * 3);
byte timehash[4]; //time encryption from timebyte
byte pin27[6]; //time encryption from timehash
int seconds = time((time_t*)null);;
timedivbyfive = seconds / 5;
for (i = 0; i < 4; i++)
//beforemd5
memcpy(beforemd5, timebyte, 4);//array_copy
//locate character "@" in username
i = 11;
memcpy(beforemd5 + 4, username, i);
i = i + 4;
//beforemd5=+++'\0';default length in chongqing is 31
memcpy(beforemd5 + i, "singlenet01", strlen("singlenet01"));
beforemd5[26] = '\0';
//aftermd5
int length = 0;
while (beforemd5[length] != '\0')
md5_init(&md5);
md5_update(&md5, beforemd5, length);
md5_final(aftermd5, &md5);//generate md5 sum
md501h[0] = aftermd5[0] >> 4 & 0xf;//get md5[0]
md501h[1] = aftermd5[0] & 0xf;//get md5[1]
sprintf(md501, "%x%x", md501h[0], md501h[1]);
//pin27
for (i = 0; i < 32; i++)
for (i = 0; i < 4; i++)
temp[1] = (timehash[0] & 3) << 4;
temp[0] = (timehash[0] >> 2) & 0x3f;
temp[2] = (timehash[1] & 0xf) << 2;
temp[1] = (timehash[1] >> 4 & 0xf) + temp[1];
temp[3] = timehash[2] & 0x3f;
temp[2] = ((timehash[2] >> 6) & 0x3) + temp[2];
temp[5] = (timehash[3] & 3) << 4;
temp[4] = (timehash[3] >> 2) & 0x3f;
for (i = 0; i < 6; i++)
}//pin
pin[0] = '\r';
pin[1] = '\n';
memcpy(pin + 2, pin27, 6);
pin[8] = md501[0];
pin[9] = md501[1];
memcpy(pin + 10, username, 19);
char pin_[29];
char userpassward_[6];
for (int count = 0; count < 29; count++)
}
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