bcpasswd.c

加密解密,安全工具！很有意思的代码

/*******************************************************************
*
*      Copyright (c) 1994-1999 Jetico, Inc., Finland
*      All rights reserved.
*
*      File: bccreate.c
*      Revision: $Id: bcpasswd.c,v 1.12 2005/05/14 07:58:33 crypt Rel-1.6-3 $
*      Created:
*      Description: implementation of change password routine
*
*******************************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <strings.h>
#include <string.h>
#include <errno.h>
#include <bc_types.h>
#include <bc_ioctl.h>
#include "keygen.h"
#include <kg_defs.h>
#include "header.h"
#include <kblock.h>
#include "alg.h"
#include "config.h"
#include "bctool.h"
#include "misc.h"
#include "error.h"

char bcpasswd_c[]="$Id: bcpasswd.c,v 1.12 2005/05/14 07:58:33 crypt Rel-1.6-3 $";

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

    struct HiddenSector  hs;
    int fd;
    ALG_SERV Alg;
    DWORD KeyHandle,DataSize;
    DATA_BLOCK db, *pdb;
    alg_info *alg_inf;
    char device[MAX_DEV_PATH];

    if ( argc < 2 )
    {
        msg(stderr,"Please specify container name\n"); 
        return -1; 
    }
    else if ( argc > 2 )
    {
        msg(stderr,"Too many parameters\n");
        return -1;
    }

    if ( (Alg.bc_fd = open_bc_dev(device, 0)) < 0 )
    {
        msg(stderr,"%s: %s\n",device,strerror(errno));
        return -1;
    }
    if ( (fd = open(argv[1], O_RDWR|O_LARGEFILE)) < 0 )
    {
        msg(stderr,"open(\"%s\",O_RDWR|O_LARGEFILE): %s\n",argv[1],strerror(errno));
        close(Alg.bc_fd);
        return -1; 
    }
    if ( read(fd, &hs, sizeof(hs))!=sizeof(hs) )
    {
        msg(stderr,"read(\"%s\",&hs, sizeof(hs)): %s\n",argv[1],strerror(errno));
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( strncmp(hs.br.OEMid, "LOCOS94 ", sizeof(hs.br.OEMid))!=0 )
    {
        msg(stderr,"%s is not valid BestCrypt container\n",argv[1]);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    };   
    if ('B' == hs.br.jmpCode[0])
    {
        msg(stderr,
            "WARNING! Container \"%s\" is probably in use!\n\n"
            "Two reasons for the report are possible:\n"
            "    1. The container is already mounted. In this case do not use the container\n"
            "    until someone dismounts it.\n"
            "    2. The container was not unmounted properly last time, so a lock mask \n"
            "    for the container was not reset. If so, unlock the container by running the command:\n"
            "        \"bctool unlock %s\" \n\n",
            argv[1],argv[1]);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }
    if ( read(fd, &db, sizeof (db))!=sizeof(db) )
    {
        msg(stderr,"read(\"%s\",&db, sizeof(db)): %s\n",argv[1],strerror(errno));
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( (alg_inf=GetInfoById(hs.algorithmId))==NULL )
    {
        msg(stderr,"Unknown algorithm Id: %d\n",hs.algorithmId);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }

    Alg.alg_id=hs.algorithmId;
    Alg.alg_module =alg_inf->mod_name;
    pdb = &db;
    DataSize = sizeof(db);

    if (KGSHA256_ID == hs.keyGenId)
    {
        UseSha256();
    }

    CreateKeyHandle(Alg,alg_inf->key_size,NULL,"Enter password:",CFLAG_CHANGE_PASSWORD,(BYTE **)&pdb,&DataSize,&KeyHandle,&Error);
    if ( Error!=0 )
    {
        print_error(Error);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }
    
    if ( lseek(fd,sizeof(hs),SEEK_SET) < 0 )
    {
        
        msg(stderr,"lseek(%d,%d,SEEK_SET): %s\n", fd, sizeof(hs), strerror(errno));
        FreeKeyHandle(Alg,KeyHandle);
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( write(fd,&db,sizeof(db)) < 0 )
    {
        msg(stderr,"write(%d,&db,%d): %s\n", fd, sizeof(db), strerror(errno));
        FreeKeyHandle(Alg,KeyHandle);
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    
    FreeKeyHandle(Alg,KeyHandle);

    close(fd);
    close(Alg.bc_fd);
    
    return 0;
}


int bcpasswd_add (int argc, char ** argv)
{
    struct HiddenSector  hs;
    int fd;
    ALG_SERV Alg;
    DWORD KeyHandle,DataSize;
    DATA_BLOCK db, *pdb;
    alg_info *alg_inf;
    char device[MAX_DEV_PATH];

    if ( argc < 2 )
    {
        msg(stderr,"Please specify container name\n"); 
        return -1; 
    }
    else if ( argc > 2 )
    {
        msg(stderr,"Too many parameters\n");
        return -1;
    }

    
    if (!is_valid_container(argv[1]))
    {
        msg(stderr,"Invalid container\n");
        return -1;
    }
    
    if ( (Alg.bc_fd = open_bc_dev(device, 0)) < 0 )
    {
        
        msg(stderr,"open(\"%s\",O_RDONLY): %s\n",device, strerror(errno));
        return -1;
    }
    if ( (fd = open(argv[1], O_RDWR|O_LARGEFILE)) < 0 )
    {
        msg(stderr,"open(\"%s\",O_RDWR|O_LARGEFILE): %s\n", argv[1], strerror(errno));
        close(Alg.bc_fd);
        return -1; 
    }
    
    if ( read(fd, &hs, sizeof(hs))!=sizeof(hs) )
    {
        msg(stderr,"Can not read container header\n");
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }

    if ( 'B' == hs.br.jmpCode[0] )
    {
        msg(stderr,
            "WARNING! Container \"%s\" is probably in use!\n\n"
            "Two reasons for the report are possible:\n"
            "    1. The container is already mounted. In this case do not use the container\n"
            "    until someone dismounts it.\n"
            "    2. The container was not unmounted properly last time, so a lock mask \n"
            "    for the container was not reset. If so, unlock the container by running the command:\n"
            "        \"bctool unlock %s\" \n\n",
            argv[1],argv[1]);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }
    if ( read(fd, &db, sizeof (db))!=sizeof(db) )
    {
        msg(stderr,"Can not read data block\n");
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( (alg_inf=GetInfoById(hs.algorithmId))==NULL )
    {
        msg(stderr,"Unknown algorithm Id: %d\n",hs.algorithmId);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }

    Alg.alg_id=hs.algorithmId;
    Alg.alg_module =alg_inf->mod_name;
    pdb = &db;
    DataSize = sizeof(db);

    if (KGSHA256_ID == hs.keyGenId)
    {
        UseSha256();
    }

    CreateKeyHandle(Alg,alg_inf->key_size,NULL,"Enter password:",CFLAG_ADD_NEW_PASSWORD,(BYTE **)&pdb,&DataSize,&KeyHandle,&Error);
    if ( Error!=0 )
    {
        print_error(Error);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }
    if ( lseek(fd,sizeof(hs),SEEK_SET) < 0 )
    {
        
        msg(stderr,"lseek(%d,%d,SEEK_SET): %s\n", fd, sizeof(hs), strerror(errno));
        FreeKeyHandle(Alg,KeyHandle);
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( write(fd,&db,sizeof(db)) < 0 )
    {
        msg(stderr,"write(%d,&db,%d): %s\n", fd, sizeof(db), strerror(errno));
        FreeKeyHandle(Alg,KeyHandle);
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }


    FreeKeyHandle(Alg,KeyHandle);

    close(fd);
    close(Alg.bc_fd);
    
    return 0;
}

int bcpasswd_del (int argc, char ** argv)
{
    struct HiddenSector  hs;
    int fd;
    ALG_SERV Alg;
    DWORD KeyHandle,DataSize;
    DATA_BLOCK db, *pdb;
    alg_info *alg_inf;
    char device[MAX_DEV_PATH];

    if ( argc < 2 )
    {
        msg(stderr,"Please specify container name\n"); 
        return -1; 
    }
    else if ( argc > 2 )
    {
        msg(stderr,"Too many parameters\n");
        return -1;
    }

    
    if (!is_valid_container(argv[1]))
    {
        msg(stderr,"Invalid container\n");
        return -1;
    }
    
    if ( (Alg.bc_fd = open_bc_dev(device, 0)) < 0 )
    {
        
        msg(stderr,"open(\"%s\",O_RDONLY): %s\n", device, strerror(errno));
        return -1;
    }
    if ( (fd = open(argv[1], O_RDWR|O_LARGEFILE)) < 0 )
    {
        msg(stderr,"open(\"%s\",O_RDWR|O_LARGEFILE): %s\n", argv[1], strerror(errno));
        close(Alg.bc_fd);
        return -1; 
    }
    
    if ( read(fd, &hs, sizeof(hs))!=sizeof(hs) )
    {
        msg(stderr,"Can not read container header\n");
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    
    if ('B' == hs.br.jmpCode[0])
    {
        msg(stderr,
            "WARNING! Container \"%s\" is probably in use!\n\n"
            "Two reasons for the report are possible:\n"
            "    1. The container is already mounted. In this case do not use the container\n"
            "    until someone dismounts it.\n"
            "    2. The container was not unmounted properly last time, so a lock mask \n"
            "    for the container was not reset. If so, unlock the container by running the command:\n"
            "        \"bctool unlock %s\" \n\n",
            argv[1],argv[1]);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }
    if ( read(fd, &db, sizeof (db))!=sizeof(db) )
    {
        msg(stderr,"Can not read data block\n");
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( (alg_inf=GetInfoById(hs.algorithmId))==NULL )
    {
        msg(stderr,"Unknown algorithm Id: %d\n",hs.algorithmId);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }

    Alg.alg_id=hs.algorithmId;
    Alg.alg_module =alg_inf->mod_name;
    pdb = &db;
    DataSize = sizeof(db);

    if (KGSHA256_ID == hs.keyGenId)
    {
        UseSha256();
    }

    CreateKeyHandle(Alg,alg_inf->key_size,NULL,"Enter password:",CFLAG_REMOVE_ADDITIONAL_PASSWORD,(BYTE **)&pdb,&DataSize,&KeyHandle,&Error);
    if ( Error!=0 )
    {
        print_error(Error);
        close(fd);
        close(Alg.bc_fd);
        return -1;
    }
    if ( lseek(fd,sizeof(hs),SEEK_SET) < 0 )
    {
        
        msg(stderr,"lseek(%d,%d,SEEK_SET): %s\n", fd, sizeof(hs), strerror(errno));
        FreeKeyHandle(Alg,KeyHandle);
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }
    if ( write(fd,&db,sizeof(db)) < 0 )
    {
        msg(stderr,"write(%d,&db,%d): %s\n", fd, sizeof(db), strerror(errno));
        FreeKeyHandle(Alg,KeyHandle);
        close(fd);
        close(Alg.bc_fd);
        return -1; 
    }


    FreeKeyHandle(Alg,KeyHandle);

    close(fd);
    close(Alg.bc_fd);
    return 0;
}