/************************************************************
*	Lovepump's MD5 Hasher
*
*	For the Phorce Forums
*
*	Enjoy!
*
*************************************************************/



#include <stdio.h>
#include <stdlib.h>
#include <openssl/bn.h>
#include <openssl/evp.h>

#define HASHSIZE 16
#define TARGETSIZE 16
#define HASH "MD5"
#define WRITESIZE 4096
#define FILENAME "test.bin"

/* Define T_OUT to have the target string written to the output file as well as the hash

#define T_OUT

*/

FILE *fd;


int file_open() {

	fd = fopen(FILENAME, "wb");
	if(!fd) return -1;
	return 1;
}

int file_close(){

	fclose(fd);
	return 1;
}


int file_write(unsigned char *buf, unsigned int size) {

	unsigned int rv;

	rv = fwrite(buf, size, 1, fd);
	if(rv < size) return -1;
	return 1;
}


void put_results(const unsigned char *target, const unsigned char *hash) {

	int i;
	static unsigned int fill = 0;
	static unsigned char buffer[WRITESIZE];
		
	if(target == NULL && hash == NULL)
	{
		file_write(buffer, fill);
		fill = 0;
		return;
	}

#ifdef T_OUT	

	if((fill + HASHSIZE + TARGETSIZE) > WRITESIZE)
	{
		file_write(buffer, fill);
		fill = 0;
	}
	
	for(i = 0; i < TARGETSIZE; i++) buffer[fill + i] = target[i];
	fill += TARGETSIZE;
	for(i = 0; i < HASHSIZE; i++) buffer[fill + i] = hash[i];
	fill += HASHSIZE;

#else

	
	if((fill + HASHSIZE) > WRITESIZE)
	{
		file_write(buffer, fill);
		fill = 0;
	}
	
	for(i = 0; i < HASHSIZE; i++) buffer[fill + i] = hash[i];
	fill += HASHSIZE;

#endif


}



int main(int argc, char **argv) {

	EVP_MD_CTX ctx;
	
	const EVP_MD *md;
	unsigned int i, len, ret, bn_size;
	unsigned char target[100];
	
	BIGNUM *t, *one;
	t = BN_new();
	one = BN_new();
	BN_zero(t);
	BN_one(one);

	unsigned char digest[HASHSIZE];
	memset(target, 0, TARGETSIZE);

	OpenSSL_add_all_digests();
	
	file_open();

	EVP_MD_CTX_init(&ctx);
	md = EVP_get_digestbyname(HASH);	
	ret = EVP_DigestInit_ex(&ctx, md, NULL);

	for(i = 0; i < 16777215; i++)
	{
			
			bn_size = BN_num_bytes(t);
			BN_bn2bin(t, target);

			/*
			printf("Message: ");
			for(k = 0; k < TARGETSIZE; k++) printf("%02x ", target[k]);
			*/

			EVP_DigestUpdate(&ctx, target, bn_size);
			EVP_DigestFinal_ex(&ctx, digest, &len);
			put_results(target, digest);	
			
			/*			
			printf("Digest: ");
			for(k = 0; k < HASHSIZE; k++) printf("%02x ", digest[k]);
			printf("\n");
			*/

			BN_add(t, t, one);	
	}
	put_results(NULL, NULL);	
	file_close();
}