【C语言】在linux中进行MD5加密的例子问题
为什么编译运行test文件的时候会出现这个。。看网上说的是编译器的问题？还是文件串联问题。。。怎么解决{:10_266:} 谢谢大佬们！ 你的md5.a是不是同一个编译器编出来的?不兼容就会这样咯, 你可以readelf -hmd5.a 看看 Krant5 发表于 2019-8-16 13:53
你的md5.a是不是同一个编译器编出来的?不兼容就会这样咯, 你可以readelf -hmd5.a 看看
都是用vi编辑的 用了readelf -h mad5.a 后他提示
readelf: Error: Not an ELF file - it has the wrong magic bytes at the start
readelf: Error: md5.a: Failed to read file header
437969418 发表于 2019-8-16 14:00
都是用vi编辑的 用了readelf -h mad5.a 后他提示
readelf: Error: Not an ELF file - it has the wrong...
输入这个看看
file md5.a
人造人 发表于 2019-8-16 14:09
输入这个看看
md5.a: ASCII C program text
437969418 发表于 2019-8-16 14:12
md5.a: ASCII C program text
cat md5.a 人造人 发表于 2019-8-16 14:15
cat md5.a
#ifndef MD5_H
#define MD5_H
typedef struct
{
unsigned int count;
unsigned int state;
unsigned char buffer;
}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 = ROATE_LEFT(a,s); \
a += b; \
}
void MD5Init(MD5_CTX *context);
void MD5Upadate(MD5_CTX *context,unsigned char *input,unsigned int inputlen);
void MD5Final(MD5_CTX *context,unsigned char digest);
void MD5Transform(unsigned int state,unsigned char block);
void MD5Encode(unsigned char *output,unsigned int *input,unsigned int len);
void MD5Decode(unsigned int *output,unsigned char *input,unsigned int len);
#endif
你是直接把C语言源文件保存成了 md5.a?
.a文件不是这样创建的
把md5.a改成md5.c就可以了
437969418 发表于 2019-8-16 14:17
这个应该改成md5.h
437969418 发表于 2019-8-16 14:17
没有md5.c?
人造人 发表于 2019-8-16 14:19
没有md5.c?
有，都手打了然后检查了。。
不过刚刚发现有个从主机移动到虚拟机的文件md5.h.gch 然后我删了
$ ls
dds0.cmd5.h test2.ctest4.ctest6.ctest.c
md5.c test1.ctest3.ctest5.ctest7.c
现在编译变成：
gcc: md5.a: No such file or directory
437969418 发表于 2019-8-16 14:24
有，都手打了然后检查了。。
不过刚刚发现有个从主机移动到虚拟机的文件md5.h.gch 然后我删了
cat md5.c
cat md5.h
gcc test.c md5.c 人造人 发表于 2019-8-16 14:45
gcc test.c md5.c
$ cat md5.c
#include <memory.h>
#include "md5.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;
context->count = 0;
context->count = 0x67452301;
context->count = 0xEFCDAB89;
context->count = 0x98BADCFE;
context->count = 0x10325476;
}
void MD5Update(MD5_CTX *context,unsigned char *input,unsigned int inputlen)
{
unsigned int i = 0,index = 0,partlen = 0;
index = (context->count >> 3) & 0x3F;
partlen = 64 - index;
context->count += inputlen << 3;
if (context->count < (inputlen << 3))
context->count++;
context->count += inputlen >> 29;
if (inputlen >= partlen)
{
memcpy(&context->buffer,input,partlen);
MD5Transform(context->state,context->buffer);
for (i = partlen;i+64 <= inputlen;i+=64)
MD5Transform(context->state,&input);
index = 0;
}
else
{
i = 0;
}
memcpy(&context->buffer,&input,inputlen-i);
}
void MD5Final(MD5_CTX *context,unsigned char digest)
{
unsigned int index = 0,padlen = 0;
unsigned char bits;
index = (context->count >> 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, j = 0;
while (j < len)
{
output = input & 0xFF;
output = (input >> 8) & 0xFF;
output = (input >> 16) & 0xFF;
output = (input >> 24) & 0xFF;
i++;
j+=4;
}
}
void MD5Decode(unsigned int *output, unsigned char *input, unsigned int len)
{
unsigned int i = 0, j = 0;
while (j < len)
{
output = (input) |
(input << 8) |
(input << 16) |
(input << 24);
i++;
j+=4;
}
}
void MD5Transform(unsigned int state,unsigned char block)
{
unsigned int a = state;
unsigned int b = state;
unsigned int c = state;
unsigned int d = state;
unsigned int x;
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, 17, 0xffff5bb1);/* 11 */
FF(b, c, d, a, x, 22, 0x895cd7be);/* 12 */
FF(a, b, c, d, x, 7, 0x6b901122);/* 13 */
FF(d, a, b, c, x, 12, 0xfd987193);/* 14 */
FF(c, d, a, b, x, 17, 0xa679438e);/* 15 */
FF(b, c, d, a, x, 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, 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, 9,0x2441453); /* 22 */
GG(c, d, a, b, x, 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, 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, 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, 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, 16, 0x6d9d6122); /* 35 */
HH(b, c, d, a, x, 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, 23, 0xbebfbc70); /* 40 */
HH(a, b, c, d, x, 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, 11, 0xe6db99e5); /* 46 */
HH(c, d, a, b, x, 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, 15, 0xab9423a7); /* 51 */
II(b, c, d, a, x[ 5], 21, 0xfc93a039); /* 52 */
II(a, b, c, d, x, 6, 0x655b59c3); /* 53 */
II(d, a, b, c, x[ 3], 10, 0x8f0ccc92); /* 54 */
II(c, d, a, b, x, 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, 10, 0xfe2ce6e0); /* 58 */
II(c, d, a, b, x[ 6], 15, 0xa3014314); /* 59 */
II(b, c, d, a, x, 21, 0x4e0811a1); /* 60 */
II(a, b, c, d, x[ 4], 6, 0xf7537e82); /* 61 */
II(d, a, b, c, x, 10, 0xbd3af235); /* 62 */
II(c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /* 63 */
II(b, c, d, a, x[ 9], 21, 0xeb86d391); /* 64 */
state += a;
state += b;
state += c;
state += d;
}
$ cat md5.h
#ifndef MD5_H
#define MD5_H
typedef struct
{
unsigned int count;
unsigned int state;
unsigned char buffer;
}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 = ROATE_LEFT(a,s); \
a += b; \
}
void MD5Init(MD5_CTX *context);
void MD5Upadate(MD5_CTX *context,unsigned char *input,unsigned int inputlen);
void MD5Final(MD5_CTX *context,unsigned char digest);
void MD5Transform(unsigned int state,unsigned char block);
void MD5Encode(unsigned char *output,unsigned int *input,unsigned int len);
void MD5Decode(unsigned int *output,unsigned char *input,unsigned int len);
#endif
$ gcc test.c md5.c
/tmp/ccnsF6rr.o: In function `MD5Transform':
md5.c:(.text+0xc45): undefined reference to `ROATE_LEFT'
md5.c:(.text+0xc82): undefined reference to `ROATE_LEFT'
md5.c:(.text+0xcbf): undefined reference to `ROATE_LEFT'
md5.c:(.text+0xcfc): undefined reference to `ROATE_LEFT'
md5.c:(.text+0xd39): undefined reference to `ROATE_LEFT'
/tmp/ccnsF6rr.o:md5.c:(.text+0xd76): more undefined references to `ROATE_LEFT' follow
collect2: ld returned 1 exit status
人造人 发表于 2019-8-16 14:45
gcc test.c md5.c
现在cat md5.a 变成 cat: md5.a: No such file or directory 了……{:10_266:} 看出问题来了吗？
人造人 发表于 2019-8-16 15:07
看出问题来了吗？
！！看到了！{:10_278:}谢谢！不过我 gcc test.c md5.a && ./a.out 怎么还是
gcc: md5.a: No such file or directory {:10_266:}
gcc test.c md5.c 没问题了。。{:10_243:} 人造人 发表于 2019-8-16 15:07
看出问题来了吗？
噢噢！！可以了！谢谢你！！{:10_297:} 人造人 发表于 2019-8-16 15:07
看出问题来了吗？
能在小小问一下，.a文件是怎么生成的吗{:10_291:} 人造人 发表于 2019-8-16 15:07
看出问题来了吗？
好像还是不行。我刚刚打错了编译运行的是
gcc test.c md5.c && ./a.out
所以运行成功了出了随机的数字，
gcc test.c md5.a && ./a.out还是显示gcc: md5.a: No such file or directory该咋办……/哭唧唧
页:
[1]
2