简单的文件加密程序（md5xor异或winlinux）

简介

　　小程序是基于 md5 + password + xor 的组合方式来加密文件。程序支持跨平台（Windows/Linux）。

使用方法：

源文件清单：main.c    md5.c    md5.h    setup.sh 

完整代码（main.c）：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdbool.h>

#ifdef __linux__ 
#include <unistd.h>
#define platform_popen popen
#else // windows
#define platform_popen _popen
#endif // os platform

#define log_print_error(fmt, ...) fprintf(stderr, \
                    "ERROR:FILE:%s:FUNC:%s:LINE:%d:" fmt, __FILE__, __func__, __LINE__, ##__VA_ARGS__);    

#include "md5.h"
#define MD5_SIZE        16
#define MAX_PASS_LEN    512
static unsigned char g_md5_value[MD5_SIZE];
static char g_md5_string[64];
#define ENCRYPT_MAGIC 0x20231028

static int xor_buffer(unsigned char *buffer, long buflen, const char *pass);
static int xor_file(const char *file, const char *pass);
static int check_encrypted(const char *file, const char *pass);
static void set_md5_val(const char *str);
static int add_shell(const char *file, const unsigned char *md5_val, int md5_len);//加壳
static int del_shell(const char *file, const unsigned char *md5_val, int md5_len);//脱壳
static int execute_shell(const char *aa, const char *bb, const char *cc, 
        const char *dd, const char *ee, const char *ff);

int rename_file(const char *oldname, const char *newname)
{
#ifdef __linux__ 
    return execute_shell("mv ", oldname, newname, " 2>/dev/null 1>/dev/null", "", "");
#else // windows
    return execute_shell("MOVE /Y ", oldname, newname, " 2>NUL 1>NUL", "", "");
#endif // os platform
}

int del_shell(const char *file, const unsigned char *md5_val, int md5_len)
{
    int ret = 0;
    const char *tmpf = "tmp.delshell";
    FILE *fp_r = fopen(file, "rb");
    FILE *fp_w = fopen(tmpf, "wb+");

    if (fp_r == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", file, strerror(errno));
        fclose(fp_w);
        fp_w = NULL;
        return -1;
    }

    if (fp_w == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", tmpf, strerror(errno));
        fclose(fp_r);
        fp_r = NULL;
        return -1;
    }

    long rlen = 0;
    long wlen = 0;
    unsigned char buffer[512];

    // jump head
    fseek(fp_r, (md5_len + 4), SEEK_SET);

    while (!feof(fp_r))
    {
        rlen = fread(buffer, 1, sizeof(buffer), fp_r);
        if (rlen < 0)
        {
            log_print_error("fread(%s) failed, %s\n", file, strerror(errno));
            goto add_shell_exit;
        }

        wlen = fwrite(buffer, 1, rlen, fp_w);
        if (wlen < 0)
        {
            log_print_error("fwrite(%s) failed, %s\n", tmpf, strerror(errno));
            goto add_shell_exit;
        }
    }

    if (fp_r) fclose(fp_r); fp_r = NULL;
    if (fp_w) fclose(fp_w); fp_w = NULL;
    rename_file(tmpf, file);
add_shell_exit:
    if (fp_r) fclose(fp_r); fp_r = NULL;
    if (fp_w) fclose(fp_w); fp_w = NULL;
    return ret;
}

int add_shell(const char *file, const unsigned char *md5_val, int md5_len)
{
    int ret = 0;
    const char *tmpf = "tmp.addshell";
    FILE *fp_r = fopen(file, "rb");
    FILE *fp_w = fopen(tmpf, "wb+");

    if (fp_r == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", file, strerror(errno));
        return -1;
    }

    if (fp_w == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", tmpf, strerror(errno));
        return -1;
    }

    long rlen = 0;
    long wlen = 0;
    unsigned char buffer[512];

    unsigned int magic = ENCRYPT_MAGIC;
    wlen = fwrite(&magic, 1, 4, fp_w);
    if (wlen < 0)
    {
        log_print_error("fwrite(%s) failed, %s\n", tmpf, strerror(errno));
        goto add_shell_exit;
    }

    // add head
    wlen = fwrite(md5_val, 1, md5_len, fp_w);
    if (wlen < 0)
    {
        log_print_error("fwrite(%s) failed, %s\n", tmpf, strerror(errno));
        goto add_shell_exit;
    }

    while (!feof(fp_r))
    {
        rlen = fread(buffer, 1, sizeof(buffer), fp_r);
        if (rlen < 0)
        {
            log_print_error("fread(%s) failed, %s\n", file, strerror(errno));
            goto add_shell_exit;
        }

        wlen = fwrite(buffer, 1, rlen, fp_w);
        if (wlen < 0)
        {
            log_print_error("fwrite(%s) failed, %s\n", tmpf, strerror(errno));
            goto add_shell_exit;
        }
    }

    if (fp_r) fclose(fp_r); fp_r = NULL;
    if (fp_w) fclose(fp_w); fp_w = NULL;
    rename_file(tmpf, file);
add_shell_exit:
    if (fp_r) fclose(fp_r); fp_r = NULL;
    if (fp_w) fclose(fp_w); fp_w = NULL;
    return ret;
}

void set_md5_val(const char *str)
{
    MD5_CTX md5;
    MD5Init(&md5);
    MD5Update(&md5, (unsigned char *)str, strnlen(str, MAX_PASS_LEN));
    MD5Final(&md5, g_md5_value);

    // convert md5 value to md5 string
    memset(g_md5_string, 0, sizeof(g_md5_string));
    char *md5_str = g_md5_string;
    for (int i = 0; i < MD5_SIZE; i++)
    {
        snprintf(md5_str + i * 2, 2 + 1, "%02x", g_md5_value[i]);
    }
}

enum { 
    STATUS_ENCRYPTED = 1,
    STATUS_DECRYPTED = 2,
    STATUS_INCORRECT = 3,
};
//returns -1=error, 1=encrypted, 2=decrypted, 3=incorrect password
int check_encrypted(const char *file, const char *pass)
{
    FILE *fp = NULL;
    unsigned char dst_value[MD5_SIZE];

    set_md5_val(pass);
    
    fp = fopen(file, "rb");
    if (fp == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", file, strerror(errno));
        return -1;
    }

    // check magic
    unsigned int magic = 0;
    long rlen = fread(&magic, 1, 4, fp);
    if (rlen < 0)
    {
        log_print_error("fread(%s) failed, %s\n", file, strerror(errno));
        goto check_encrypted_exit;
    }

    // 表示已经加密,接下来进一步检查密码正确性
    if (magic == ENCRYPT_MAGIC)
    {
        // 读取密码MD5
        long rlen = fread(dst_value, 1, sizeof(dst_value), fp);
        if (rlen < 0)
        {
            log_print_error("fread(%s) failed, %s\n", file, strerror(errno));
            goto check_encrypted_exit;
        }
        if (fp) fclose(fp);

        // 对比MD5一致性
        if (0 == memcmp(g_md5_value, dst_value, sizeof(dst_value)))
        {
            return STATUS_ENCRYPTED;
        }
        else
        {
            return STATUS_INCORRECT;
        }
    }

check_encrypted_exit:
    if (fp) fclose(fp);
    return STATUS_DECRYPTED;
}

int xor_buffer(unsigned char *buffer, long buflen, const char *pass)
{
    int ret = 0;
    long bufidx = 0;
    int keyidx = 0;
    for (bufidx = 0; bufidx < buflen; bufidx++)
    {
        if (pass[keyidx] == 0)
        {
            keyidx = 0;
            continue;
        }

        buffer[bufidx] = buffer[bufidx] ^ pass[keyidx];
        keyidx++;
    }

    return ret;
}

int encrypt_file(const char *file)
{
    const char *tmpf = "tmp.xor";
    FILE *fp_r = fopen(file, "rb");
    FILE *fp_w = fopen(tmpf, "wb+");
    if (fp_r == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", file, strerror(errno));
        return -1;
    }

    if (fp_w == NULL)
    {
        log_print_error("fopen(%s) failed, %s\n", tmpf, strerror(errno));
        return -1;
    }

    int ret = 0;
    long readLen = 0;
    long writLen = 0;
    unsigned char buffer[512];
    while (!feof(fp_r))
    {
        // read
        readLen = fread(buffer, 1, sizeof(buffer), fp_r);
        if (readLen < 0)
        {
            log_print_error("fread(%s) failed, %s\n", file, strerror(errno));
            ret = readLen;
            goto encrypt_file_exit;
        }

        // calculate
        ret = xor_buffer(buffer, readLen, g_md5_string);

        // write
        writLen = fwrite(buffer, 1, readLen, fp_w);
        if (writLen < 0)
        {
            log_print_error("fwrite(%s) failed, %s\n", tmpf, strerror(errno));
            ret = writLen;
            goto encrypt_file_exit;
        }

        if (readLen < sizeof(buffer))
        {
            break;
        }
    }

encrypt_file_exit:
    if (fp_r) fclose(fp_r); fp_r = NULL;
    if (fp_w) fclose(fp_w); fp_w = NULL;
    rename_file(tmpf, file);
    return 0;
}

int xor_file(const char *file, const char *pass)
{
    // 如果已经加密,则该动作表示解密
    int status = check_encrypted(file, pass);

    switch (status)
    {
    case STATUS_ENCRYPTED:
    {
        del_shell(file, g_md5_value, sizeof(g_md5_value));
        encrypt_file(file);
        fprintf(stdout, "SUCCESS: DECRYPT %s\n", file);
        break;
    }
    case STATUS_DECRYPTED:
    {
        encrypt_file(file);
        add_shell(file, g_md5_value, sizeof(g_md5_value));
        fprintf(stdout, "SUCCESS: ENCRYPT %s\n", file);
        break;
    }
    case STATUS_INCORRECT:
    {
        fprintf(stdout, "ERROR: Incorrect password %s\n", pass);
        break;
    }
    default:
        break;
    }

    return 0;
}

int del_strspace(char *filename, int size)
{
    char *ptr = filename + size;
    while ( ptr != filename)
    {
        if ((*ptr) == '\r' ||
            (*ptr) == '\n')
        {
            *ptr = 0;
        }
        ptr--;
    }
}

int execute_shell(const char *aa, const char *bb, const char *cc, 
        const char *dd, const char *ee, const char *ff)
{
    char cmdline[1024];
    memset(cmdline, 0, sizeof(cmdline));
    snprintf(cmdline, sizeof(cmdline), "%s %s %s %s %s %s", aa,bb,cc,dd,ee,ff);
    return system(cmdline);
}

int cmdline_lsall(char *cmdline, int cmdlen)
{
    memset(cmdline, 0, cmdlen);
#ifdef __linux__ 
    snprintf(cmdline, cmdlen, "ls");
#else // windows
    snprintf(cmdline, cmdlen, "dir /b");
#endif // os platform
    return 0;
}

int del_tmpfile(void)
{
#ifdef __linux__ 
    system("rm -rf tmp.* 2>/dev/null 1>/dev/null");
#else // windows
    system("del /s /q /f tmp.* 2>NUL 1>NUL");
#endif // os platform
    return 0;
}

int main(int argc, const char *argv[])
{
    if (argc != 4)
    {
        fprintf(stderr, "usage:%s  -f  <filename>  <password>\n", argv[0]);
        fprintf(stderr, "usage:%s  -d  <dirname>   <password>\n", argv[0]);
        fprintf(stderr, "  e.g:%s  -f  test.mp4  abc123\n", argv[0]);
        fprintf(stderr, "  e.g:%s  -d  testdir  abc123\n", argv[0]);
        return -1;
    }
    const char *input_opt = argv[1];
    const char *input_file = argv[2];
    const char *input_pass = argv[3];

    if (strncmp(input_opt, "-f", 2) == 0)
    {
        xor_file(input_file, input_pass);
        del_tmpfile();
        return 0;
    }

    if (strncmp(input_opt, "-d", 2) == 0)
    {
        char cmdline[64];

        // cd testdir
        chdir(input_file);

        cmdline_lsall(cmdline, sizeof(cmdline));
        FILE *fp_d = platform_popen(cmdline, "r");
        if (fp_d == NULL)
        {
            log_print_error("_popen failed, %s\n", strerror(errno));
            return -1;
        }

        long file_cnt = 0;
        char filename[512];
        while (!feof(fp_d))
        {

            memset(filename, 0, sizeof(filename));
            fgets(filename, sizeof(filename), fp_d);
            if (strlen(filename) == 0)
            {
                break;
            }
            file_cnt++;
            del_strspace(filename, strnlen(filename, sizeof(filename)) + 4);
            xor_file(filename, input_pass);
            del_tmpfile();
        }

        return 0;
    }
    
    return 0;
}

完整代码（md5.c）：

#include "md5.h"
#include <memory.h>

unsigned char PADDING[] =
{
    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
};

void MD5Init(MD5_CTX *context)
{
    context->count[0] = 0;
    context->count[1] = 0;
    context->state[0] = 0x67452301;
    context->state[1] = 0xEFCDAB89;
    context->state[2] = 0x98BADCFE;
    context->state[3] = 0x10325476;
}

void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputlen)
{
    unsigned int i = 0;
    unsigned int index = 0;
    unsigned int partlen = 0;

    index = (context->count[0] >> 3) & 0x3F;
    partlen = 64 - index;
    context->count[0] += inputlen << 3;

    if (context->count[0] < (inputlen << 3))
        context->count[1]++;
    context->count[1] += inputlen >> 29;

    if (inputlen >= partlen)
    {
        memcpy(&context->buffer[index], input, partlen);
        MD5Transform(context->state, context->buffer);

        for (i = partlen; i + 64 <= inputlen; i += 64)
            MD5Transform(context->state, &input[i]);

        index = 0;
    }
    else
    {
        i = 0;
    }
    memcpy(&context->buffer[index], &input[i], inputlen - i);
}

void MD5Final(MD5_CTX *context, unsigned char digest[16])
{
    unsigned int index = 0, padlen = 0;
    unsigned char bits[8];

    index = (context->count[0] >> 3) & 0x3F;
    padlen = (index < 56) ? (56 - index) : (120 - index);
    MD5Encode(bits, context->count, 8);
    MD5Update(context, PADDING, padlen);
    MD5Update(context, bits, 8);
    MD5Encode(digest, context->state, 16);
}

void MD5Encode(unsigned char *output, unsigned int *input, unsigned int len)
{
    unsigned int i = 0;
    unsigned int j = 0;

    while (j < len)
    {
        output[j] = input[i] & 0xFF;
        output[j + 1] = (input[i] >> 8) & 0xFF;
        output[j + 2] = (input[i] >> 16) & 0xFF;
        output[j + 3] = (input[i] >> 24) & 0xFF;
        i++;
        j += 4;
    }
}

void MD5Decode(unsigned int *output, unsigned char *input, unsigned int len)
{
    unsigned int i = 0;
    unsigned int j = 0;

    while (j < len)
    {
        output[i] = (input[j]) |
            (input[j + 1] << 8) |
            (input[j + 2] << 16) |
            (input[j + 3] << 24);
        i++;
        j += 4;
    }
}

void MD5Transform(unsigned int state[4], unsigned char block[64])
{
    unsigned int a = state[0];
    unsigned int b = state[1];
    unsigned int c = state[2];
    unsigned int d = state[3];
    unsigned int x[64];

    MD5Decode(x, block, 64);

    FF(a, b, c, d, x[0], 7, 0xd76aa478); /* 1 */
    FF(d, a, b, c, x[1], 12, 0xe8c7b756); /* 2 */
    FF(c, d, a, b, x[2], 17, 0x242070db); /* 3 */
    FF(b, c, d, a, x[3], 22, 0xc1bdceee); /* 4 */
    FF(a, b, c, d, x[4], 7, 0xf57c0faf); /* 5 */
    FF(d, a, b, c, x[5], 12, 0x4787c62a); /* 6 */
    FF(c, d, a, b, x[6], 17, 0xa8304613); /* 7 */
    FF(b, c, d, a, x[7], 22, 0xfd469501); /* 8 */
    FF(a, b, c, d, x[8], 7, 0x698098d8); /* 9 */
    FF(d, a, b, c, x[9], 12, 0x8b44f7af); /* 10 */
    FF(c, d, a, b, x[10], 17, 0xffff5bb1); /* 11 */
    FF(b, c, d, a, x[11], 22, 0x895cd7be); /* 12 */
    FF(a, b, c, d, x[12], 7, 0x6b901122); /* 13 */
    FF(d, a, b, c, x[13], 12, 0xfd987193); /* 14 */
    FF(c, d, a, b, x[14], 17, 0xa679438e); /* 15 */
    FF(b, c, d, a, x[15], 22, 0x49b40821); /* 16 */

                                           /* Round 2 */
    GG(a, b, c, d, x[1], 5, 0xf61e2562); /* 17 */
    GG(d, a, b, c, x[6], 9, 0xc040b340); /* 18 */
    GG(c, d, a, b, x[11], 14, 0x265e5a51); /* 19 */
    GG(b, c, d, a, x[0], 20, 0xe9b6c7aa); /* 20 */
    GG(a, b, c, d, x[5], 5, 0xd62f105d); /* 21 */
    GG(d, a, b, c, x[10], 9, 0x2441453); /* 22 */
    GG(c, d, a, b, x[15], 14, 0xd8a1e681); /* 23 */
    GG(b, c, d, a, x[4], 20, 0xe7d3fbc8); /* 24 */
    GG(a, b, c, d, x[9], 5, 0x21e1cde6); /* 25 */
    GG(d, a, b, c, x[14], 9, 0xc33707d6); /* 26 */
    GG(c, d, a, b, x[3], 14, 0xf4d50d87); /* 27 */
    GG(b, c, d, a, x[8], 20, 0x455a14ed); /* 28 */
    GG(a, b, c, d, x[13], 5, 0xa9e3e905); /* 29 */
    GG(d, a, b, c, x[2], 9, 0xfcefa3f8); /* 30 */
    GG(c, d, a, b, x[7], 14, 0x676f02d9); /* 31 */
    GG(b, c, d, a, x[12], 20, 0x8d2a4c8a); /* 32 */

                                           /* Round 3 */
    HH(a, b, c, d, x[5], 4, 0xfffa3942); /* 33 */
    HH(d, a, b, c, x[8], 11, 0x8771f681); /* 34 */
    HH(c, d, a, b, x[11], 16, 0x6d9d6122); /* 35 */
    HH(b, c, d, a, x[14], 23, 0xfde5380c); /* 36 */
    HH(a, b, c, d, x[1], 4, 0xa4beea44); /* 37 */
    HH(d, a, b, c, x[4], 11, 0x4bdecfa9); /* 38 */
    HH(c, d, a, b, x[7], 16, 0xf6bb4b60); /* 39 */
    HH(b, c, d, a, x[10], 23, 0xbebfbc70); /* 40 */
    HH(a, b, c, d, x[13], 4, 0x289b7ec6); /* 41 */
    HH(d, a, b, c, x[0], 11, 0xeaa127fa); /* 42 */
    HH(c, d, a, b, x[3], 16, 0xd4ef3085); /* 43 */
    HH(b, c, d, a, x[6], 23, 0x4881d05); /* 44 */
    HH(a, b, c, d, x[9], 4, 0xd9d4d039); /* 45 */
    HH(d, a, b, c, x[12], 11, 0xe6db99e5); /* 46 */
    HH(c, d, a, b, x[15], 16, 0x1fa27cf8); /* 47 */
    HH(b, c, d, a, x[2], 23, 0xc4ac5665); /* 48 */

                                          /* Round 4 */
    II(a, b, c, d, x[0], 6, 0xf4292244); /* 49 */
    II(d, a, b, c, x[7], 10, 0x432aff97); /* 50 */
    II(c, d, a, b, x[14], 15, 0xab9423a7); /* 51 */
    II(b, c, d, a, x[5], 21, 0xfc93a039); /* 52 */
    II(a, b, c, d, x[12], 6, 0x655b59c3); /* 53 */
    II(d, a, b, c, x[3], 10, 0x8f0ccc92); /* 54 */
    II(c, d, a, b, x[10], 15, 0xffeff47d); /* 55 */
    II(b, c, d, a, x[1], 21, 0x85845dd1); /* 56 */
    II(a, b, c, d, x[8], 6, 0x6fa87e4f); /* 57 */
    II(d, a, b, c, x[15], 10, 0xfe2ce6e0); /* 58 */
    II(c, d, a, b, x[6], 15, 0xa3014314); /* 59 */
    II(b, c, d, a, x[13], 21, 0x4e0811a1); /* 60 */
    II(a, b, c, d, x[4], 6, 0xf7537e82); /* 61 */
    II(d, a, b, c, x[11], 10, 0xbd3af235); /* 62 */
    II(c, d, a, b, x[2], 15, 0x2ad7d2bb); /* 63 */
    II(b, c, d, a, x[9], 21, 0xeb86d391); /* 64 */
    state[0] += a;
    state[1] += b;
    state[2] += c;
    state[3] += d;
}

完整代码（md5.h）：

#ifndef MD5_H
#define MD5_H

typedef struct
{
    unsigned int count[2];
    unsigned int state[4];
    unsigned char buffer[64];
} MD5_CTX;


#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))
#define ROTATE_LEFT(x,n) ((x << n) | (x >> (32-n)))

#define FF(a,b,c,d,x,s,ac) \
{ \
    a += F(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}
#define GG(a,b,c,d,x,s,ac) \
{ \
    a += G(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}
#define HH(a,b,c,d,x,s,ac) \
{ \
    a += H(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}
#define II(a,b,c,d,x,s,ac) \
{ \
    a += I(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}                                            
void MD5Init(MD5_CTX *context);
void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputlen);
void MD5Final(MD5_CTX *context, unsigned char digest[16]);
void MD5Transform(unsigned int state[4], unsigned char block[64]);
void MD5Encode(unsigned char *output, unsigned int *input, unsigned int len);
void MD5Decode(unsigned int *output, unsigned char *input, unsigned int len);

#endif

完整代码（setup.sh）：linux下的编译脚本。

#!/bin/bash

# demo_aaa.c demo_bbb.c demo_ccc.c ...
target=( encrypt_video )

# mod_aaa.c mod_bbb.c mod_ccc.c ...
subsrc=( md5.c )

cflags=( -lpthread )
SUDO=sudo
ext_cflags=""

function check_permisson()
{
    if [ ${UID} -eq 0 ];then
        SUDO=""
    else
        SUDO="sudo -E"
    fi
}

function setup_all()
{
    # gcc ${target}.c ${subsrc}.c -o ${target}.run
    for(( i=0;i<${#target[@]};i++)) do
        echo "compile ${target[i]}.c ${subsrc[@]} ${cflags[@]} ${ext_cflags} ..."
        gcc ${target[i]}.c ${subsrc[@]} -o ${target[i]}.run ${cflags[@]} ${ext_cflags}
        if [ $? -ne 0 ];then
            echo "compile ${target[i]}.c ${subsrc[@]} failed";
            exit 1;
        fi
        echo "compile ${target[i]}.c ${subsrc[@]} ${cflags[@]} ${ext_cflags} complete"
    done;
}

function setup_clean()
{
    rm -rf ${target[@]}.run
}

function help()
{
    echo "usage: $0  all     --compile program or objects"
    echo "usage: $0  clean   --clean program or objects"
}

function all() 
{
    check_permisson; 
    ext_cflags=""
    setup_all;
}
function clean() { setup_clean; }

if [ $# -lt 1 ];then
    help;
    exit 1;
fi

$@