C语言和python分别计算文件的md5值

C语言版：

参考链接：https://blog.csdn.net/a_ran/article/details/40897159

 

cal_md5.c

#include "md5.h"
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#define READ_DATA_SIZE    1024
#define MD5_SIZE        16
#define MD5_STR_LEN        (MD5_SIZE * 2)
 
int Compute_file_md5(const char *file_path, char *value);
 
int main(int argc, char *argv[])
{
    int ret;
    const char *file_path = argv[1];
    char md5_str[MD5_STR_LEN + 1];

    if(access(file_path,F_OK))
    {
        printf("file not exist!\n");
        return 0;
    }

    ret = Compute_file_md5(file_path, md5_str);
    if (0 == ret)
    {
        printf("[file - %s] md5 value:\n", file_path);
        printf("%s\n", md5_str);
    }
    else
    {
        printf("md5 cal fail\n");
    }
    return 0;
}
 
int Compute_file_md5(const char *file_path, char *md5_str)
{
    int i;
    int fd;
    int ret;
    unsigned char data[READ_DATA_SIZE];
    unsigned char md5_value[MD5_SIZE];
    MD5_CTX md5;
 
    fd = open(file_path, O_RDONLY);
    if (-1 == fd)
    {
        perror("open");
        return -1;
    }
 
    // init md5
    MD5Init(&md5);
 
    while (1)
    {
        ret = read(fd, data, READ_DATA_SIZE);
        if (-1 == ret)
        {
            perror("read");
            return -1;
        }
 
        MD5Update(&md5, data, ret);
 
        if (0 == ret || ret < READ_DATA_SIZE)
        {
            break;
        }
    }
 
    close(fd);
 
    MD5Final(&md5, md5_value);
 
    for(i = 0; i < MD5_SIZE; i++)
    {
        snprintf(md5_str + i*2, 2+1, "%02x", md5_value[i]);
    }
    md5_str[MD5_STR_LEN] = '\0'; // add end
 
    return 0;
}

 

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

 

 

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;
}

 

 

python版：

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import hashlib
import base64
import sys 

'''
sha1 file with filename (SHA1)
'''
def SHA1FileWithName(fineName, block_size=64 * 1024):
  with open(fineName, 'rb') as f:
    sha1 = hashlib.sha1()
    while True:
      data = f.read(block_size)
      if not data:
        break
      sha1.update(data)
    retsha1 = base64.b64encode(sha1.digest())
    return retsha1

'''
md5 file with filename (MD5)
'''
def MD5FileWithName(fineName, block_size=64 * 1024):
  with open(fineName, 'rb') as f:
    md5 = hashlib.md5()
    while True:
      data = f.read(block_size)
      if not data:
        break
      md5.update(data)
    print("file's md5=",md5.digest())
    print("file's md5=",md5.hexdigest())
    retmd5 = base64.b64encode(md5.digest())
    return retmd5

if __name__=="__main__":
    print("begin cal md5")
    # print("sys[0]=%s",sys.argv[0])
    MD5FileWithName(sys.argv[1])