/* 
 * md5.c by Torben Nielsen
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <openssl/md5.h>

int main(int argc, char *argv[])
{
	FILE *file;
	unsigned char *output;
	unsigned char *buf;
	int num;
	int size;
	int i;
	MD5_CTX *md5struct;

	size = sizeof(unsigned char);

	if (argc != 2)
	{
		printf("Usage: md5 <file>\n");
		return 1;
	}

	file = fopen(argv[1],"r");

	if (file == 0)
	{
		printf("Could not open %s\n", argv[1]);
		return 2;
	}

	md5struct = malloc( sizeof(MD5_CTX) );
	MD5_Init(md5struct);

	buf = malloc( size * 128);
	while (!feof(file))
	{
		num = fread(buf, size, 128, file);
		MD5_Update(md5struct, buf, num*size) ;
	}
	fclose(file);

	output = malloc( size * 16);

	MD5_Final(output, md5struct);

	for (i=0;i<16;i++)
	{
		printf("%02x",output[i]);
	}
	printf("  %s\n", argv[1]);

	free(md5struct);
	free(output);

	return 0;
}