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/* photoid.c - photo ID handling code
* Copyright (C) 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <limits.h>
#include "keydb.h"
#include "i18n.h"
#include "options.h"
#include "memory.h"
#include "status.h"
#include "util.h"
#include "packet.h"
#include "iobuf.h"
#include "exec.h"
#include "photoid.h"
#define PHOTO_COMMAND_MAXLEN 1024
#define DEFAULT_PHOTO_COMMAND "xloadimage -fork -quiet -title 'KeyID 0x%k' stdin"
#define PHOTO_FILENAME_TEMPLATE "gnupg-photo-id-XXXXXX"
/* Generate a new photo id packet, or return NULL if canceled */
PKT_user_id *generate_photo_id(PKT_public_key *pk)
{
PKT_user_id *uid;
int error=1,i,len;
char *filename=NULL;
unsigned char *photo=NULL;
byte header[16];
IOBUF file;
header[0]=0x10; /* little side of photo header length */
header[1]=0; /* big side of photo header length */
header[2]=1; /* 1 == version of photo header */
header[3]=1; /* 1 == JPEG */
for(i=4;i<16;i++) /* The reserved bytes */
header[i]=0;
uid=m_alloc_clear(sizeof(*uid)+50);
printf(_("\nPick an image to use for your photo ID. "
"The image must be a JPEG file.\n"
"Remember that the image is stored within your public key. "
"If you use a\n"
"very large picture, your key will become very large as well!\n"
"Keeping the image close to 240x288 is a good size to use.\n"));
while(photo==NULL)
{
printf("\n");
m_free(filename);
filename=cpr_get("photoid.jpeg.add",
_("Enter JPEG filename for photo ID: "));
if(strlen(filename)==0)
goto scram;
file=iobuf_open(filename);
if(!file)
{
log_error(_("Unable to open photo \"%s\": %s\n"),
filename,strerror(errno));
continue;
}
len=iobuf_get_filelength(file);
if(len>6144)
{
printf("This JPEG is really large (%d bytes) !\n",len);
if(!cpr_get_answer_is_yes("photoid.jpeg.size",
_("Are you sure you want to use it (y/n)? ")))
{
iobuf_close(file);
continue;
}
}
photo=m_alloc(len);
iobuf_read(file,photo,len);
iobuf_close(file);
/* Is it a JPEG? */
if(photo[0]!=0xFF || photo[1]!=0xD8 ||
photo[6]!='J' || photo[7]!='F' || photo[8]!='I' || photo[9]!='F')
{
log_error(_("\"%s\" is not a JPEG file\n"),filename);
m_free(photo);
photo=NULL;
continue;
}
/* Build the packet */
build_attribute_subpkt(uid,1,photo,len,header,16);
parse_attribute_subpkts(uid);
make_attribute_uidname(uid);
show_photo(uid->attribs,pk);
switch(cpr_get_answer_yes_no_quit("photoid.jpeg.okay",
_("Is this photo correct (y/n/q)? ")))
{
case -1:
goto scram;
case 0:
free_attributes(uid);
m_free(photo);
photo=NULL;
continue;
}
}
error=0;
scram:
m_free(filename);
m_free(photo);
if(error)
{
free_attributes(uid);
m_free(uid);
return NULL;
}
return uid;
}
void show_photo(const struct user_attribute *attr,PKT_public_key *pk)
{
const char *ch;
char command[PHOTO_COMMAND_MAXLEN]={'\0'};
int size=0;
u32 keyid[2]={0,0};
struct exec_info *spawn;
keyid_from_pk(pk,keyid);
ch=opt.photo_viewer?opt.photo_viewer:DEFAULT_PHOTO_COMMAND;
/* %-expandos */
/* make command grow */
while(*ch!='\0')
{
if(*ch=='%')
{
ch++;
switch(*ch)
{
case 'k': /* short key id */
if(size+8>PHOTO_COMMAND_MAXLEN-1)
goto fail;
sprintf(&command[size],"%08lX",(ulong)keyid[1]);
size+=8;
break;
case 'K': /* long key id */
if(size+16>PHOTO_COMMAND_MAXLEN-1)
goto fail;
sprintf(&command[size],"%08lX%08lX",
(ulong)keyid[0],(ulong)keyid[1]);
size+=16;
break;
case 'f': /* fingerprint */
{
byte array[MAX_FINGERPRINT_LEN];
int len,i;
fingerprint_from_pk(pk,array,&len);
if(size+(len*2)>PHOTO_COMMAND_MAXLEN-1)
goto fail;
for(i=0;i<len;i++)
{
sprintf(&command[size],"%02X",array[i]);
size+=2;
}
}
break;
case '%':
size++;
if(size>PHOTO_COMMAND_MAXLEN-1)
goto fail;
strcat(command,"%");
break;
default:
if(size+2>PHOTO_COMMAND_MAXLEN-1)
goto fail;
command[size++]='%';
command[size++]=*ch;
break;
}
}
else
{
command[size++]=*ch;
if(size>PHOTO_COMMAND_MAXLEN-1)
goto fail;
}
ch++;
}
command[PHOTO_COMMAND_MAXLEN-1]='\0';
if(exec_write(&spawn,NULL,command,1,1)!=0)
goto fail;
fwrite(attr->data,attr->len,1,spawn->tochild);
if(exec_read(spawn)!=0)
goto fail;
if(exec_finish(spawn)!=0)
goto fail;
return;
fail:
log_error("unable to display photo ID!\n");
}
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