LCOV - code coverage report
Current view: top level - g10 - photoid.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 143 0.0 %
Date: 2016-11-29 15:00:56 Functions: 0 5 0.0 %

          Line data    Source code
       1             : /* photoid.c - photo ID handling code
       2             :  * Copyright (C) 2001, 2002, 2005, 2006, 2008, 2011 Free Software Foundation, Inc.
       3             :  *
       4             :  * This file is part of GnuPG.
       5             :  *
       6             :  * GnuPG is free software; you can redistribute it and/or modify
       7             :  * it under the terms of the GNU General Public License as published by
       8             :  * the Free Software Foundation; either version 3 of the License, or
       9             :  * (at your option) any later version.
      10             :  *
      11             :  * GnuPG is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :  * GNU General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU General Public License
      17             :  * along with this program; if not, see <https://www.gnu.org/licenses/>.
      18             :  */
      19             : 
      20             : #include <config.h>
      21             : #include <errno.h>
      22             : #include <stdio.h>
      23             : #include <string.h>
      24             : #ifdef _WIN32
      25             : # ifdef HAVE_WINSOCK2_H
      26             : #  include <winsock2.h>
      27             : # endif
      28             : # include <windows.h>
      29             : # ifndef VER_PLATFORM_WIN32_WINDOWS
      30             : #  define VER_PLATFORM_WIN32_WINDOWS 1
      31             : # endif
      32             : #endif
      33             : 
      34             : #include "gpg.h"
      35             : #include "util.h"
      36             : #include "packet.h"
      37             : #include "status.h"
      38             : #include "exec.h"
      39             : #include "keydb.h"
      40             : #include "i18n.h"
      41             : #include "iobuf.h"
      42             : #include "options.h"
      43             : #include "main.h"
      44             : #include "photoid.h"
      45             : #include "ttyio.h"
      46             : #include "trustdb.h"
      47             : 
      48             : /* Generate a new photo id packet, or return NULL if canceled.
      49             :    FIXME:  Should we add a duplicates check similar to generate_user_id? */
      50             : PKT_user_id *
      51           0 : generate_photo_id (ctrl_t ctrl, PKT_public_key *pk,const char *photo_name)
      52             : {
      53             :   PKT_user_id *uid;
      54           0 :   int error=1,i;
      55             :   unsigned int len;
      56             :   char *filename;
      57           0 :   byte *photo=NULL;
      58             :   byte header[16];
      59             :   IOBUF file;
      60             :   int overflow;
      61             : 
      62           0 :   header[0]=0x10; /* little side of photo header length */
      63           0 :   header[1]=0;    /* big side of photo header length */
      64           0 :   header[2]=1;    /* 1 == version of photo header */
      65           0 :   header[3]=1;    /* 1 == JPEG */
      66             : 
      67           0 :   for(i=4;i<16;i++) /* The reserved bytes */
      68           0 :     header[i]=0;
      69             : 
      70             : #define EXTRA_UID_NAME_SPACE 71
      71           0 :   uid=xmalloc_clear(sizeof(*uid)+71);
      72             : 
      73           0 :   if(photo_name && *photo_name)
      74           0 :     filename=make_filename(photo_name,(void *)NULL);
      75             :   else
      76             :     {
      77           0 :       tty_printf(_("\nPick an image to use for your photo ID."
      78             :                    "  The image must be a JPEG file.\n"
      79             :                    "Remember that the image is stored within your public key."
      80             :                    "  If you use a\n"
      81             :                    "very large picture, your key will become very large"
      82             :                    " as well!\n"
      83             :                    "Keeping the image close to 240x288 is a good size"
      84             :                    " to use.\n"));
      85           0 :       filename=NULL;
      86             :     }
      87             : 
      88           0 :   while(photo==NULL)
      89             :     {
      90           0 :       if(filename==NULL)
      91             :         {
      92             :           char *tempname;
      93             : 
      94           0 :           tty_printf("\n");
      95             : 
      96           0 :           tty_enable_completion(NULL);
      97             : 
      98           0 :           tempname=cpr_get("photoid.jpeg.add",
      99           0 :                            _("Enter JPEG filename for photo ID: "));
     100             : 
     101           0 :           tty_disable_completion();
     102             : 
     103           0 :           filename=make_filename(tempname,(void *)NULL);
     104             : 
     105           0 :           xfree(tempname);
     106             : 
     107           0 :           if(strlen(filename)==0)
     108           0 :             goto scram;
     109             :         }
     110             : 
     111           0 :       file=iobuf_open(filename);
     112           0 :       if (file && is_secured_file (iobuf_get_fd (file)))
     113             :         {
     114           0 :           iobuf_close (file);
     115           0 :           file = NULL;
     116           0 :           gpg_err_set_errno (EPERM);
     117             :         }
     118           0 :       if(!file)
     119             :         {
     120           0 :           log_error(_("unable to open JPEG file '%s': %s\n"),
     121           0 :                     filename,strerror(errno));
     122           0 :           xfree(filename);
     123           0 :           filename=NULL;
     124           0 :           continue;
     125             :         }
     126             : 
     127             : 
     128           0 :       len=iobuf_get_filelength(file, &overflow);
     129           0 :       if(len>6144 || overflow)
     130             :         {
     131           0 :           tty_printf( _("This JPEG is really large (%d bytes) !\n"),len);
     132           0 :           if(!cpr_get_answer_is_yes("photoid.jpeg.size",
     133           0 :                             _("Are you sure you want to use it? (y/N) ")))
     134             :           {
     135           0 :             iobuf_close(file);
     136           0 :             xfree(filename);
     137           0 :             filename=NULL;
     138           0 :             continue;
     139             :           }
     140             :         }
     141             : 
     142           0 :       photo=xmalloc(len);
     143           0 :       iobuf_read(file,photo,len);
     144           0 :       iobuf_close(file);
     145             : 
     146             :       /* Is it a JPEG? */
     147           0 :       if(photo[0]!=0xFF || photo[1]!=0xD8)
     148             :         {
     149           0 :           log_error(_("'%s' is not a JPEG file\n"),filename);
     150           0 :           xfree(photo);
     151           0 :           photo=NULL;
     152           0 :           xfree(filename);
     153           0 :           filename=NULL;
     154           0 :           continue;
     155             :         }
     156             : 
     157             :       /* Build the packet */
     158           0 :       build_attribute_subpkt(uid,1,photo,len,header,16);
     159           0 :       parse_attribute_subpkts(uid);
     160           0 :       make_attribute_uidname(uid, EXTRA_UID_NAME_SPACE);
     161             : 
     162             :       /* Showing the photo is not safe when noninteractive since the
     163             :          "user" may not be able to dismiss a viewer window! */
     164           0 :       if(opt.command_fd==-1)
     165             :         {
     166           0 :           show_photos (ctrl, uid->attribs, uid->numattribs, pk, uid);
     167           0 :           switch(cpr_get_answer_yes_no_quit("photoid.jpeg.okay",
     168           0 :                                          _("Is this photo correct (y/N/q)? ")))
     169             :             {
     170             :             case -1:
     171           0 :               goto scram;
     172             :             case 0:
     173           0 :               free_attributes(uid);
     174           0 :               xfree(photo);
     175           0 :               photo=NULL;
     176           0 :               xfree(filename);
     177           0 :               filename=NULL;
     178           0 :               continue;
     179             :             }
     180             :         }
     181             :     }
     182             : 
     183           0 :   error=0;
     184           0 :   uid->ref=1;
     185             : 
     186             :  scram:
     187           0 :   xfree(filename);
     188           0 :   xfree(photo);
     189             : 
     190           0 :   if(error)
     191             :     {
     192           0 :       free_attributes(uid);
     193           0 :       xfree(uid);
     194           0 :       return NULL;
     195             :     }
     196             : 
     197           0 :   return uid;
     198             : }
     199             : 
     200             : /* Returns 0 for error, 1 for valid */
     201           0 : int parse_image_header(const struct user_attribute *attr,byte *type,u32 *len)
     202             : {
     203             :   u16 headerlen;
     204             : 
     205           0 :   if(attr->len<3)
     206           0 :     return 0;
     207             : 
     208             :   /* For historical reasons (i.e. "oops!"), the header length is
     209             :      little endian. */
     210           0 :   headerlen=(attr->data[1]<<8) | attr->data[0];
     211             : 
     212           0 :   if(headerlen>attr->len)
     213           0 :     return 0;
     214             : 
     215           0 :   if(type && attr->len>=4)
     216             :     {
     217           0 :       if(attr->data[2]==1) /* header version 1 */
     218           0 :         *type=attr->data[3];
     219             :       else
     220           0 :         *type=0;
     221             :     }
     222             : 
     223           0 :   *len=attr->len-headerlen;
     224             : 
     225           0 :   if(*len==0)
     226           0 :     return 0;
     227             : 
     228           0 :   return 1;
     229             : }
     230             : 
     231             : /* style==0 for extension, 1 for name, 2 for MIME type.  Remember that
     232             :    the "name" style string could be used in a user ID name field, so
     233             :    make sure it is not too big (see parse-packet.c:parse_attribute).
     234             :    Extensions should be 3 characters long for the best cross-platform
     235             :    compatibility. */
     236           0 : char *image_type_to_string(byte type,int style)
     237             : {
     238             :   char *string;
     239             : 
     240           0 :   switch(type)
     241             :     {
     242             :     case 1: /* jpeg */
     243           0 :       if(style==0)
     244           0 :         string="jpg";
     245           0 :       else if(style==1)
     246           0 :         string="jpeg";
     247             :       else
     248           0 :         string="image/jpeg";
     249           0 :       break;
     250             : 
     251             :     default:
     252           0 :       if(style==0)
     253           0 :         string="bin";
     254           0 :       else if(style==1)
     255           0 :         string="unknown";
     256             :       else
     257           0 :         string="image/x-unknown";
     258           0 :       break;
     259             :     }
     260             : 
     261           0 :   return string;
     262             : }
     263             : 
     264             : #if !defined(FIXED_PHOTO_VIEWER) && !defined(DISABLE_PHOTO_VIEWER)
     265           0 : static const char *get_default_photo_command(void)
     266             : {
     267             : #if defined(_WIN32)
     268             :   OSVERSIONINFO osvi;
     269             : 
     270             :   memset(&osvi,0,sizeof(osvi));
     271             :   osvi.dwOSVersionInfoSize=sizeof(osvi);
     272             :   GetVersionEx(&osvi);
     273             : 
     274             :   if(osvi.dwPlatformId==VER_PLATFORM_WIN32_WINDOWS)
     275             :     return "start /w %i";
     276             :   else
     277             :     return "cmd /c start /w %i";
     278             : #elif defined(__APPLE__)
     279             :   /* OS X.  This really needs more than just __APPLE__. */
     280             :   return "open %I";
     281             : #elif defined(__riscos__)
     282             :   return "Filer_Run %I";
     283             : #else
     284           0 :   return "xloadimage -fork -quiet -title 'KeyID 0x%k' stdin";
     285             : #endif
     286             : }
     287             : #endif
     288             : 
     289             : 
     290             : void
     291           0 : show_photos (ctrl_t ctrl, const struct user_attribute *attrs, int count,
     292             :              PKT_public_key *pk, PKT_user_id *uid)
     293             : {
     294             : #ifdef DISABLE_PHOTO_VIEWER
     295             :   (void)attrs;
     296             :   (void)count;
     297             :   (void)pk;
     298             :   (void)uid;
     299             : #else /*!DISABLE_PHOTO_VIEWER*/
     300             :   int i;
     301             :   struct expando_args args;
     302             :   u32 len;
     303           0 :   u32 kid[2]={0,0};
     304             : 
     305           0 :   memset (&args, 0, sizeof(args));
     306           0 :   args.pk = pk;
     307           0 :   args.validity_info = get_validity_info (ctrl, NULL, pk, uid);
     308           0 :   args.validity_string = get_validity_string (ctrl, pk, uid);
     309           0 :   namehash_from_uid (uid);
     310           0 :   args.namehash = uid->namehash;
     311             : 
     312           0 :   if (pk)
     313           0 :     keyid_from_pk (pk, kid);
     314             : 
     315           0 :   for(i=0;i<count;i++)
     316           0 :     if(attrs[i].type==ATTRIB_IMAGE &&
     317           0 :        parse_image_header(&attrs[i],&args.imagetype,&len))
     318             :       {
     319             :         char *command,*name;
     320             :         struct exec_info *spawn;
     321           0 :         int offset=attrs[i].len-len;
     322             : 
     323             : #ifdef FIXED_PHOTO_VIEWER
     324             :         opt.photo_viewer=FIXED_PHOTO_VIEWER;
     325             : #else
     326           0 :         if(!opt.photo_viewer)
     327           0 :           opt.photo_viewer=get_default_photo_command();
     328             : #endif
     329             : 
     330             :         /* make command grow */
     331           0 :         command=pct_expando(opt.photo_viewer,&args);
     332           0 :         if(!command)
     333           0 :           goto fail;
     334             : 
     335           0 :         name=xmalloc(16+strlen(EXTSEP_S)+
     336             :                      strlen(image_type_to_string(args.imagetype,0))+1);
     337             : 
     338             :         /* Make the filename.  Notice we are not using the image
     339             :            encoding type for more than cosmetics.  Most external image
     340             :            viewers can handle a multitude of types, and even if one
     341             :            cannot understand a particular type, we have no way to know
     342             :            which.  The spec permits this, by the way. -dms */
     343             : 
     344             : #ifdef USE_ONLY_8DOT3
     345             :         sprintf(name,"%08lX" EXTSEP_S "%s",(ulong)kid[1],
     346             :                 image_type_to_string(args.imagetype,0));
     347             : #else
     348           0 :         sprintf(name,"%08lX%08lX" EXTSEP_S "%s",(ulong)kid[0],(ulong)kid[1],
     349           0 :                 image_type_to_string(args.imagetype,0));
     350             : #endif
     351             : 
     352           0 :         if(exec_write(&spawn,NULL,command,name,1,1)!=0)
     353             :           {
     354           0 :             xfree(name);
     355           0 :             goto fail;
     356             :           }
     357             : 
     358             : #ifdef __riscos__
     359             :         riscos_set_filetype_by_mimetype(spawn->tempfile_in,
     360             :                                         image_type_to_string(args.imagetype,2));
     361             : #endif
     362             : 
     363           0 :         xfree(name);
     364             : 
     365           0 :         fwrite(&attrs[i].data[offset],attrs[i].len-offset,1,spawn->tochild);
     366             : 
     367           0 :         if(exec_read(spawn)!=0)
     368             :           {
     369           0 :             exec_finish(spawn);
     370           0 :             goto fail;
     371             :           }
     372             : 
     373           0 :         if(exec_finish(spawn)!=0)
     374           0 :           goto fail;
     375             :       }
     376             : 
     377           0 :   return;
     378             : 
     379             :  fail:
     380           0 :   log_error(_("unable to display photo ID!\n"));
     381             : #endif /*!DISABLE_PHOTO_VIEWER*/
     382             : }

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