一、C代码
静态库
四个.h.c文件
add.h
#ifndef ADD_H
#define ADD_H int add(int a,int b); #endif
add.c
#include <stdio.h> int add(int a,int b)
{
printf("%d %d\n",a,b);
return (a + b);
}
decrease.h
#ifndef DECREASE_H
#define DECREASE_H int decrease(int a,int b); #endif
decrease.c
#include <stdio.h> int decrease(int a,int b)
{
printf("%d %d\n",a,b);
return (a - b);
}
multiply.h
#ifndef MULTIPLY_H
#define MULTIPLY_H int multiply(int a,int b); #endif
multiply.c
#include <stdio.h> int multiply(int a,int b)
{
printf("%d %d\n",a,b);
return (a * b);
}
divide.h
#ifndef DIVIDE_H
#define DIVIDE_H float divide(float a,int b); #endif
divide.c
#include <stdio.h> int divide(int a,int b)
{
printf("%d %d\n",a,b);
return (a / b);
}
编译成静态库的命令：
gcc -c add.c decrease.c multiply.c divide.c
ar -rv libarithmetic.a add.o decrease.o multiply.o divide.o
若想要在main.c文件中调用
#include <stdio.h> int main(int argc,char **argv)
{
int a = add(,);
int b = decrease(,);
int c = multiply(,);
int d = divide(,);
printf("%d %d %d %d\n",a,b,c,d);
return ;
}
编译时使用命令
gcc -o hello main.c -L /home/jason/share/test/Makefile/static/lib -larithmetic
编译成动态库的命令
gcc add.c decrease.c multiply.c divide.c -fPIC -shared -o libmyhello.so
main.c调用
gcc -o main main.c -L/home/jason/share/test/Makefile/share/lib -lmyhello
终端导入路径：
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/jason/share/test/Makefile/share/lib
Makefile的编写
在hello.c文件里调用静态库libarithmetic.a
main.c
#include <stdio.h> int main(int argc,char **argv)
{
hello("everyone");
return ;
}
hello.c
#include <stdio.h> void hello(const char *name)
{
printf("Hello %s!\n",name);
int a = add(,);
int b = decrease(,);
int c = multiply(,);
int d = divide(,);
printf("%d %d %d %d\n",a,b,c,d);
}
Makefile
CC = gcc
CXX = g++ LIBS = -static -L/home/jason/share/test/Makefile/static/lib -larithmetic OBJ = admdtest OBJ_SOURCE = main.c \
hello.c $(OBJ):$(OBJ_SOURCE)
$(CC) -o $@ $(OBJ_SOURCE) $(LIBS) clean:
rm -f *.o $(OBJ)
动态库调用的Makefile
CC = gcc
CXX = g++ LIBS = -L/home/jason/share/test/Makefile/share/lib -lmyhello OBJ = admdtest OBJ_SOURCE = main.c \
hello.c $(OBJ):$(OBJ_SOURCE)
$(CC) -o $@ $(OBJ_SOURCE) $(LIBS) clean:
rm -f *.o $(OBJ)
并在终端导入环境：
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/jason/share/test/Makefile/share/lib
二、C++代码
md5.h
#ifndef MD5_H
#define MD5_H #include <string>
#include <fstream> /* Type define */
typedef unsigned char byte;
typedef unsigned long ulong; using std::string;
using std::ifstream; /* MD5 declaration. */
class MD5
{
public:
MD5();
MD5(const void *input, size_t length);
MD5(const string &str);
MD5(ifstream &in);
void update(const void *input, size_t length);
void update(const string &str);
void update(ifstream &in);
const byte* digest();
string toString();
void reset();
void PrintMD5(const string &str, MD5 &md5);
private:
void update(const byte *input, size_t length);
void final();
void transform(const byte block[]);
void encode(const ulong *input, byte *output, size_t length);
void decode(const byte *input, ulong *output, size_t length);
string bytesToHexString(const byte *input, size_t length); /* class uncopyable */
MD5(const MD5&);
MD5& operator=(const MD5&);
private:
ulong _state[]; /* state (ABCD) */
ulong _count[]; /* number of bits, modulo 2^64 (low-order word first) */
byte _buffer[]; /* input buffer */
byte _digest[]; /* message digest */
bool _finished; /* calculate finished ? */ static const byte PADDING[]; /* padding for calculate */
static const char HEX[];
static const size_t BUFFER_SIZE = ;
}; #endif/*MD5_H*/
md5.cpp
#include "md5.h"
#include <iostream>
#include <string.h>
#include <stdlib.h> using namespace std; /* Constants for MD5Transform routine. */
#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 /* 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) { \
(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); \
} const byte MD5::PADDING[] = { 0x80 };
const char MD5::HEX[] = {
'', '', '', '',
'', '', '', '',
'', '', 'a', 'b',
'c', 'd', 'e', 'f'
}; /* Default construct. */
MD5::MD5() {
reset();
} /* Construct a MD5 object with a input buffer. */
MD5::MD5(const void *input, size_t length) {
reset();
update(input, length);
} /* Construct a MD5 object with a string. */
MD5::MD5(const string &str) {
reset();
update(str);
} /* Construct a MD5 object with a file. */
MD5::MD5(ifstream &in) {
reset();
update(in);
} /* Return the message-digest */
const byte* MD5::digest() {
if (!_finished) {
_finished = true;
final();
}
return _digest;
} /* Reset the calculate state */
void MD5::reset() { _finished = false;
/* reset number of bits. */
_count[] = _count[] = ;
/* Load magic initialization constants. */
_state[] = 0x67452301;
_state[] = 0xefcdab89;
_state[] = 0x98badcfe;
_state[] = 0x10325476;
} /* Updating the context with a input buffer. */
void MD5::update(const void *input, size_t length) {
update((const byte*)input, length);
} /* Updating the context with a string. */
void MD5::update(const string &str) {
update((const byte*)str.c_str(), str.length());
} /* Updating the context with a file. */
void MD5::update(ifstream &in) { if (!in)
return; std::streamsize length;
char buffer[BUFFER_SIZE];
while (!in.eof()) {
in.read(buffer, BUFFER_SIZE);
length = in.gcount();
if (length > )
update(buffer, length);
}
in.close();
} /* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5::update(const byte *input, size_t length) { ulong i, index, partLen; _finished = false; /* Compute number of bytes mod 64 */
index = (ulong)((_count[] >> ) & 0x3f); /* update number of bits */
if((_count[] += ((ulong)length << )) < ((ulong)length << ))
_count[]++;
_count[] += ((ulong)length >> ); partLen = - index; /* transform as many times as possible. */
if(length >= partLen) { memcpy(&_buffer[index], input, partLen);
transform(_buffer); for (i = partLen; i + < length; i += )
transform(&input[i]);
index = ; } else {
i = ;
} /* Buffer remaining input */
memcpy(&_buffer[index], &input[i], length-i);
} /* MD5 finalization. Ends an MD5 message-_digest operation, writing the
the message _digest and zeroizing the context.
*/
void MD5::final() { byte bits[];
ulong oldState[];
ulong oldCount[];
ulong index, padLen; /* Save current state and count. */
memcpy(oldState, _state, );
memcpy(oldCount, _count, ); /* Save number of bits */
encode(_count, bits, ); /* Pad out to 56 mod 64. */
index = (ulong)((_count[] >> ) & 0x3f);
padLen = (index < ) ? ( - index) : ( - index);
update(PADDING, padLen); /* Append length (before padding) */
update(bits, ); /* Store state in digest */
encode(_state, _digest, ); /* Restore current state and count. */
memcpy(_state, oldState, );
memcpy(_count, oldCount, );
} /* MD5 basic transformation. Transforms _state based on block. */
void MD5::transform(const byte block[]) { ulong a = _state[], b = _state[], c = _state[], d = _state[], x[]; decode(block, x, ); /* Round 1 */
FF (a, b, c, d, x[ ], S11, 0xd76aa478); /* 1 */
FF (d, a, b, c, x[ ], S12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, x[ ], S13, 0x242070db); /* 3 */
FF (b, c, d, a, x[ ], S14, 0xc1bdceee); /* 4 */
FF (a, b, c, d, x[ ], S11, 0xf57c0faf); /* 5 */
FF (d, a, b, c, x[ ], S12, 0x4787c62a); /* 6 */
FF (c, d, a, b, x[ ], S13, 0xa8304613); /* 7 */
FF (b, c, d, a, x[ ], S14, 0xfd469501); /* 8 */
FF (a, b, c, d, x[ ], S11, 0x698098d8); /* 9 */
FF (d, a, b, c, x[ ], S12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, x[], S13, 0xffff5bb1); /* 11 */
FF (b, c, d, a, x[], S14, 0x895cd7be); /* 12 */
FF (a, b, c, d, x[], S11, 0x6b901122); /* 13 */
FF (d, a, b, c, x[], S12, 0xfd987193); /* 14 */
FF (c, d, a, b, x[], S13, 0xa679438e); /* 15 */
FF (b, c, d, a, x[], S14, 0x49b40821); /* 16 */ /* Round 2 */
GG (a, b, c, d, x[ ], S21, 0xf61e2562); /* 17 */
GG (d, a, b, c, x[ ], S22, 0xc040b340); /* 18 */
GG (c, d, a, b, x[], S23, 0x265e5a51); /* 19 */
GG (b, c, d, a, x[ ], S24, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, x[ ], S21, 0xd62f105d); /* 21 */
GG (d, a, b, c, x[], S22, 0x2441453); /* 22 */
GG (c, d, a, b, x[], S23, 0xd8a1e681); /* 23 */
GG (b, c, d, a, x[ ], S24, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, x[ ], S21, 0x21e1cde6); /* 25 */
GG (d, a, b, c, x[], S22, 0xc33707d6); /* 26 */
GG (c, d, a, b, x[ ], S23, 0xf4d50d87); /* 27 */
GG (b, c, d, a, x[ ], S24, 0x455a14ed); /* 28 */
GG (a, b, c, d, x[], S21, 0xa9e3e905); /* 29 */
GG (d, a, b, c, x[ ], S22, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, x[ ], S23, 0x676f02d9); /* 31 */
GG (b, c, d, a, x[], S24, 0x8d2a4c8a); /* 32 */ /* Round 3 */
HH (a, b, c, d, x[ ], S31, 0xfffa3942); /* 33 */
HH (d, a, b, c, x[ ], S32, 0x8771f681); /* 34 */
HH (c, d, a, b, x[], S33, 0x6d9d6122); /* 35 */
HH (b, c, d, a, x[], S34, 0xfde5380c); /* 36 */
HH (a, b, c, d, x[ ], S31, 0xa4beea44); /* 37 */
HH (d, a, b, c, x[ ], S32, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, x[ ], S33, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, x[], S34, 0xbebfbc70); /* 40 */
HH (a, b, c, d, x[], S31, 0x289b7ec6); /* 41 */
HH (d, a, b, c, x[ ], S32, 0xeaa127fa); /* 42 */
HH (c, d, a, b, x[ ], S33, 0xd4ef3085); /* 43 */
HH (b, c, d, a, x[ ], S34, 0x4881d05); /* 44 */
HH (a, b, c, d, x[ ], S31, 0xd9d4d039); /* 45 */
HH (d, a, b, c, x[], S32, 0xe6db99e5); /* 46 */
HH (c, d, a, b, x[], S33, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, x[ ], S34, 0xc4ac5665); /* 48 */ /* Round 4 */
II (a, b, c, d, x[ ], S41, 0xf4292244); /* 49 */
II (d, a, b, c, x[ ], S42, 0x432aff97); /* 50 */
II (c, d, a, b, x[], S43, 0xab9423a7); /* 51 */
II (b, c, d, a, x[ ], S44, 0xfc93a039); /* 52 */
II (a, b, c, d, x[], S41, 0x655b59c3); /* 53 */
II (d, a, b, c, x[ ], S42, 0x8f0ccc92); /* 54 */
II (c, d, a, b, x[], S43, 0xffeff47d); /* 55 */
II (b, c, d, a, x[ ], S44, 0x85845dd1); /* 56 */
II (a, b, c, d, x[ ], S41, 0x6fa87e4f); /* 57 */
II (d, a, b, c, x[], S42, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, x[ ], S43, 0xa3014314); /* 59 */
II (b, c, d, a, x[], S44, 0x4e0811a1); /* 60 */
II (a, b, c, d, x[ ], S41, 0xf7537e82); /* 61 */
II (d, a, b, c, x[], S42, 0xbd3af235); /* 62 */
II (c, d, a, b, x[ ], S43, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, x[ ], S44, 0xeb86d391); /* 64 */ _state[] += a;
_state[] += b;
_state[] += c;
_state[] += d;
} /* Encodes input (ulong) into output (byte). Assumes length is
a multiple of 4.
*/
void MD5::encode(const ulong *input, byte *output, size_t length) { for(size_t i=, j=; j<length; i++, j+=) {
output[j]= (byte)(input[i] & 0xff);
output[j+] = (byte)((input[i] >> ) & 0xff);
output[j+] = (byte)((input[i] >> ) & 0xff);
output[j+] = (byte)((input[i] >> ) & 0xff);
}
} /* Decodes input (byte) into output (ulong). Assumes length is
a multiple of 4.
*/
void MD5::decode(const byte *input, ulong *output, size_t length) { for(size_t i=, j=; j<length; i++, j+=) {
output[i] = ((ulong)input[j]) | (((ulong)input[j+]) << ) |
(((ulong)input[j+]) << ) | (((ulong)input[j+]) << );
}
} /* Convert byte array to hex string. */
string MD5::bytesToHexString(const byte *input, size_t length) {
string str;
str.reserve(length << );
for(size_t i = ; i < length; i++) {
int t = input[i];
int a = t / ;
int b = t % ;
str.append(, HEX[a]);
str.append(, HEX[b]);
}
return str;
} /* Convert digest to string value */
string MD5::toString()
{
return bytesToHexString(digest(), );
} void PrintMD5(const string &str, MD5 &md5)
{
cout << "MD5(\"" << str << "\") = " << md5.toString() << endl;
}
编译成静态库：
g++ -c md5.cpp
ar -rv libmd5.a md5.o
在main.cpp里面的调用
#include "md5.h"
#include <iostream>
using namespace std; int main(int argc,char **argv)
{
MD5 md5;
const char *livekey = "0090E601F3E9";
md5.update(livekey);
cout <<"MD5(\""<<livekey<<"\") = " << md5.toString()<<endl;
return ;
}
编译命令：
g++ -o main main.cpp -L /home/jason/share/test/c++_lib/static/lib -lmd5
编译成动态库：
g++ md5.cpp -fPIC -shared -o libmd5.so
main.cpp调用
g++ -o main main.c -L/home/jason/share/test/c++_lib/share/lib -lmd5
Makefile的编写
在main.cpp中调用mac.cpp
#include "mac.h"
#include <iostream>
using namespace std; int main(int argc,char **argv)
{
MAC mac;
mac.getMac();
return ;
}
mac.h
#ifndef MAC_H
#define MAC_H #include "md5.h" #include <stdio.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <netinet/in.h> #include <string.h>
#include <stdlib.h> #include <iostream>
using namespace std; class MAC
{
public:
MAC();
void getMac();
}; #endif
mac.cpp
#include "mac.h" #include <iostream>
using namespace std; MAC::MAC()
{ } void MAC::getMac()
{
char mac[];
int sockfd;
struct ifreq tmp;
char mac_addr[]; sockfd = socket(AF_INET, SOCK_STREAM, );
if( sockfd < )
{
perror("create socket fail\n");
return ;
} memset(&tmp,,sizeof(struct ifreq));
strncpy(tmp.ifr_name,"eth0",sizeof(tmp.ifr_name)-);
if( (ioctl(sockfd,SIOCGIFHWADDR,&tmp)) < )
{
printf("mac ioctl error\n");
return ;
} sprintf(mac_addr, "%02x%02x%02x%02x%02x%02x",
(unsigned char)tmp.ifr_hwaddr.sa_data[],
(unsigned char)tmp.ifr_hwaddr.sa_data[],
(unsigned char)tmp.ifr_hwaddr.sa_data[],
(unsigned char)tmp.ifr_hwaddr.sa_data[],
(unsigned char)tmp.ifr_hwaddr.sa_data[],
(unsigned char)tmp.ifr_hwaddr.sa_data[]
);
printf("local mac:%s\n", mac_addr);
close(sockfd);
memcpy(mac,mac_addr,strlen(mac));
MD5 md5;
md5.update(mac);
cout <<"MD5(\""<<mac<<"\") = " << md5.toString()<<endl; }
md5.h、md5.cpp同上这里省略
Makefile
静态库的调用
CC = gcc
CXX = g++ LIBS = -static -L/home/jason/share/test/c++_Makefile/static/lib -lmd5 OBJ = main OBJ_SOURCE = main.cpp \
mac.cpp $(OBJ):$(OBJ_SOURCE)
$(CXX) -o $@ $(OBJ_SOURCE) $(LIBS) clean:
rm -f *.o $(OBJ)
动态库的调用
CC = gcc
CXX = g++ LIBS = -L/home/jason/share/test/c++_Makefile/share/lib -lmd5 OBJ = main OBJ_SOURCE = main.cpp \
mac.cpp $(OBJ):$(OBJ_SOURCE)
$(CXX) -o $@ $(OBJ_SOURCE) $(LIBS) clean:
rm -f *.o $(OBJ)
需要在终端导入库环境：
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/jason/share/test/c++_Makefile/share/lib
以上代码通过测试