mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-23 10:29:58 +01:00
02a85a958c
the W32 defined macro. Removed unneeded initialization of static variables. * gpgkeys_http.c: Ditto. * ksutil.h: s/MAX_PATH/URLMAX_PATH/.
409 lines
8.3 KiB
C
409 lines
8.3 KiB
C
/* gpgkeys_http.c - fetch a key via HTTP
|
|
* Copyright (C) 2004, 2005 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 <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#ifdef HAVE_GETOPT_H
|
|
#include <getopt.h>
|
|
#endif
|
|
#define INCLUDED_BY_MAIN_MODULE 1
|
|
#include "util.h"
|
|
#include "http.h"
|
|
#include "keyserver.h"
|
|
#include "ksutil.h"
|
|
|
|
extern char *optarg;
|
|
extern int optind;
|
|
|
|
static int verbose=0;
|
|
static unsigned int http_flags=0;
|
|
static char auth[MAX_AUTH+1];
|
|
static char host[MAX_HOST+1];
|
|
static char proxy[MAX_PROXY+1];
|
|
static char port[MAX_PORT+1];
|
|
static char path[URLMAX_PATH+1];
|
|
static FILE *input,*output,*console;
|
|
|
|
#ifdef __riscos__
|
|
#define HTTP_PROXY_ENV "GnuPG$HttpProxy"
|
|
#else
|
|
#define HTTP_PROXY_ENV "http_proxy"
|
|
#endif
|
|
|
|
static int
|
|
get_key(char *getkey)
|
|
{
|
|
int rc;
|
|
char *request;
|
|
struct http_context hd;
|
|
|
|
if(strncmp(getkey,"0x",2)==0)
|
|
getkey+=2;
|
|
|
|
fprintf(output,"KEY 0x%s BEGIN\n",getkey);
|
|
|
|
request=malloc(4+3+strlen(host)+1+strlen(port)+1+strlen(path)+50);
|
|
if(!request)
|
|
{
|
|
fprintf(console,"gpgkeys: out of memory\n");
|
|
return KEYSERVER_NO_MEMORY;
|
|
}
|
|
|
|
sprintf(request,"http://%s%s%s%s%s%s%s",auth[0]?auth:"",auth[0]?"@":"",
|
|
host,port[0]?":":"",port[0]?port:"",path[0]?"":"/",path);
|
|
|
|
rc=http_open_document(&hd,request,http_flags,proxy[0]?proxy:NULL);
|
|
if(rc!=0)
|
|
{
|
|
fprintf(console,"gpgkeys: HTTP fetch error: %s\n",
|
|
rc==G10ERR_NETWORK?strerror(errno):g10_errstr(rc));
|
|
fprintf(output,"KEY 0x%s FAILED %d\n",getkey,
|
|
rc==G10ERR_NETWORK?KEYSERVER_UNREACHABLE:KEYSERVER_INTERNAL_ERROR);
|
|
}
|
|
else
|
|
{
|
|
unsigned int maxlen=1024,buflen,gotit=0;
|
|
byte *line=NULL;
|
|
|
|
while(iobuf_read_line(hd.fp_read,&line,&buflen,&maxlen))
|
|
{
|
|
maxlen=1024;
|
|
|
|
if(gotit)
|
|
{
|
|
fputs(line,output);
|
|
if(strncmp(line,END,strlen(END))==0)
|
|
break;
|
|
}
|
|
else
|
|
if(strncmp(line,BEGIN,strlen(BEGIN))==0)
|
|
{
|
|
fputs(line,output);
|
|
gotit=1;
|
|
}
|
|
}
|
|
|
|
if(gotit)
|
|
fprintf(output,"KEY 0x%s END\n",getkey);
|
|
else
|
|
{
|
|
fprintf(console,"gpgkeys: key %s not found on keyserver\n",getkey);
|
|
fprintf(output,"KEY 0x%s FAILED %d\n",
|
|
getkey,KEYSERVER_KEY_NOT_FOUND);
|
|
}
|
|
|
|
m_free(line);
|
|
}
|
|
|
|
free(request);
|
|
|
|
return KEYSERVER_OK;
|
|
}
|
|
|
|
static void
|
|
show_help (FILE *fp)
|
|
{
|
|
fprintf (fp,"-h\thelp\n");
|
|
fprintf (fp,"-V\tversion\n");
|
|
fprintf (fp,"-o\toutput to this file\n");
|
|
}
|
|
|
|
int
|
|
main(int argc,char *argv[])
|
|
{
|
|
int arg,action=-1,ret=KEYSERVER_INTERNAL_ERROR;
|
|
char line[MAX_LINE];
|
|
char *thekey=NULL;
|
|
unsigned int timeout=DEFAULT_KEYSERVER_TIMEOUT;
|
|
|
|
console=stderr;
|
|
|
|
/* Kludge to implement standard GNU options. */
|
|
if (argc > 1 && !strcmp (argv[1], "--version"))
|
|
{
|
|
fputs ("gpgkeys_http (GnuPG) " VERSION"\n", stdout);
|
|
return 0;
|
|
}
|
|
else if (argc > 1 && !strcmp (argv[1], "--help"))
|
|
{
|
|
show_help (stdout);
|
|
return 0;
|
|
}
|
|
|
|
while((arg=getopt(argc,argv,"hVo:"))!=-1)
|
|
switch(arg)
|
|
{
|
|
default:
|
|
case 'h':
|
|
show_help (console);
|
|
return KEYSERVER_OK;
|
|
|
|
case 'V':
|
|
fprintf(stdout,"%d\n%s\n",KEYSERVER_PROTO_VERSION,VERSION);
|
|
return KEYSERVER_OK;
|
|
|
|
case 'o':
|
|
output=fopen(optarg,"w");
|
|
if(output==NULL)
|
|
{
|
|
fprintf(console,"gpgkeys: Cannot open output file `%s': %s\n",
|
|
optarg,strerror(errno));
|
|
return KEYSERVER_INTERNAL_ERROR;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if(argc>optind)
|
|
{
|
|
input=fopen(argv[optind],"r");
|
|
if(input==NULL)
|
|
{
|
|
fprintf(console,"gpgkeys: Cannot open input file `%s': %s\n",
|
|
argv[optind],strerror(errno));
|
|
return KEYSERVER_INTERNAL_ERROR;
|
|
}
|
|
}
|
|
|
|
if(input==NULL)
|
|
input=stdin;
|
|
|
|
if(output==NULL)
|
|
output=stdout;
|
|
|
|
/* Get the command and info block */
|
|
|
|
while(fgets(line,MAX_LINE,input)!=NULL)
|
|
{
|
|
int version;
|
|
char command[MAX_COMMAND+1];
|
|
char option[MAX_OPTION+1];
|
|
char hash;
|
|
|
|
if(line[0]=='\n')
|
|
break;
|
|
|
|
if(sscanf(line,"%c",&hash)==1 && hash=='#')
|
|
continue;
|
|
|
|
if(sscanf(line,"COMMAND %" MKSTRING(MAX_COMMAND) "s\n",command)==1)
|
|
{
|
|
command[MAX_COMMAND]='\0';
|
|
|
|
if(strcasecmp(command,"get")==0)
|
|
action=GET;
|
|
|
|
continue;
|
|
}
|
|
|
|
if(sscanf(line,"AUTH %" MKSTRING(MAX_AUTH) "s\n",auth)==1)
|
|
{
|
|
auth[MAX_AUTH]='\0';
|
|
continue;
|
|
}
|
|
|
|
if(sscanf(line,"HOST %" MKSTRING(MAX_HOST) "s\n",host)==1)
|
|
{
|
|
host[MAX_HOST]='\0';
|
|
continue;
|
|
}
|
|
|
|
if(sscanf(line,"PORT %" MKSTRING(MAX_PORT) "s\n",port)==1)
|
|
{
|
|
port[MAX_PORT]='\0';
|
|
continue;
|
|
}
|
|
|
|
if(sscanf(line,"PATH %" MKSTRING(URLMAX_PATH) "s\n",path)==1)
|
|
{
|
|
path[URLMAX_PATH]='\0';
|
|
continue;
|
|
}
|
|
|
|
if(sscanf(line,"VERSION %d\n",&version)==1)
|
|
{
|
|
if(version!=KEYSERVER_PROTO_VERSION)
|
|
{
|
|
ret=KEYSERVER_VERSION_ERROR;
|
|
goto fail;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if(sscanf(line,"OPTION %" MKSTRING(MAX_OPTION) "s\n",option)==1)
|
|
{
|
|
int no=0;
|
|
char *start=&option[0];
|
|
|
|
option[MAX_OPTION]='\0';
|
|
|
|
if(strncasecmp(option,"no-",3)==0)
|
|
{
|
|
no=1;
|
|
start=&option[3];
|
|
}
|
|
|
|
if(strcasecmp(start,"verbose")==0)
|
|
{
|
|
if(no)
|
|
verbose--;
|
|
else
|
|
verbose++;
|
|
}
|
|
else if(strncasecmp(start,"http-proxy",10)==0)
|
|
{
|
|
if(no)
|
|
proxy[0]='\0';
|
|
else if(start[10]=='=')
|
|
{
|
|
strncpy(proxy,&start[11],79);
|
|
proxy[79]='\0';
|
|
}
|
|
else if(start[10]=='\0')
|
|
{
|
|
char *http_proxy=getenv(HTTP_PROXY_ENV);
|
|
if(http_proxy)
|
|
{
|
|
strncpy(proxy,http_proxy,79);
|
|
proxy[79]='\0';
|
|
}
|
|
}
|
|
}
|
|
else if(strcasecmp(start,"broken-http-proxy")==0)
|
|
{
|
|
if(no)
|
|
http_flags&=~HTTP_FLAG_NO_SHUTDOWN;
|
|
else
|
|
http_flags|=HTTP_FLAG_NO_SHUTDOWN;
|
|
}
|
|
else if(strcasecmp(start,"try-dns-srv")==0)
|
|
{
|
|
if(no)
|
|
http_flags&=~HTTP_FLAG_TRY_SRV;
|
|
else
|
|
http_flags|=HTTP_FLAG_TRY_SRV;
|
|
}
|
|
else if(strncasecmp(start,"timeout",7)==0)
|
|
{
|
|
if(no)
|
|
timeout=0;
|
|
else if(start[7]=='=')
|
|
timeout=atoi(&start[8]);
|
|
else if(start[7]=='\0')
|
|
timeout=DEFAULT_KEYSERVER_TIMEOUT;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if(timeout && register_timeout()==-1)
|
|
{
|
|
fprintf(console,"gpgkeys: unable to register timeout handler\n");
|
|
return KEYSERVER_INTERNAL_ERROR;
|
|
}
|
|
|
|
/* By suggested convention, if the user gives a :port, then disable
|
|
SRV. */
|
|
if(port[0])
|
|
http_flags&=~HTTP_FLAG_TRY_SRV;
|
|
|
|
/* If it's a GET or a SEARCH, the next thing to come in is the
|
|
keyids. If it's a SEND, then there are no keyids. */
|
|
|
|
if(action==GET)
|
|
{
|
|
/* Eat the rest of the file */
|
|
for(;;)
|
|
{
|
|
if(fgets(line,MAX_LINE,input)==NULL)
|
|
break;
|
|
else
|
|
{
|
|
if(line[0]=='\n' || line[0]=='\0')
|
|
break;
|
|
|
|
if(!thekey)
|
|
{
|
|
thekey=strdup(line);
|
|
if(!thekey)
|
|
{
|
|
fprintf(console,"gpgkeys: out of memory while "
|
|
"building key list\n");
|
|
ret=KEYSERVER_NO_MEMORY;
|
|
goto fail;
|
|
}
|
|
|
|
/* Trim the trailing \n */
|
|
thekey[strlen(line)-1]='\0';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf(console,
|
|
"gpgkeys: this keyserver type only supports key retrieval\n");
|
|
goto fail;
|
|
}
|
|
|
|
if(!thekey || !host[0])
|
|
{
|
|
fprintf(console,"gpgkeys: invalid keyserver instructions\n");
|
|
goto fail;
|
|
}
|
|
|
|
/* Send the response */
|
|
|
|
fprintf(output,"VERSION %d\n",KEYSERVER_PROTO_VERSION);
|
|
fprintf(output,"PROGRAM %s\n\n",VERSION);
|
|
|
|
if(verbose>1)
|
|
{
|
|
fprintf(console,"Host:\t\t%s\n",host);
|
|
if(port[0])
|
|
fprintf(console,"Port:\t\t%s\n",port);
|
|
if(path[0])
|
|
fprintf(console,"Path:\t\t%s\n",path);
|
|
fprintf(console,"Command:\tGET\n");
|
|
}
|
|
|
|
set_timeout(timeout);
|
|
|
|
ret=get_key(thekey);
|
|
|
|
fail:
|
|
|
|
free(thekey);
|
|
|
|
if(input!=stdin)
|
|
fclose(input);
|
|
|
|
if(output!=stdout)
|
|
fclose(output);
|
|
|
|
return ret;
|
|
}
|