mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-04 20:38:50 +01:00
efa0dd21a2
parse_ks_options and remove a lot of common code. * ksutil.h, ksutil.c (parse_ks_options): Parse OPAQUE, and default debug with no arguments to 1.
426 lines
9.0 KiB
C
426 lines
9.0 KiB
C
/* gpgkeys_curl.c - fetch a key via libcurl
|
|
* 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
|
|
#ifdef FAKE_CURL
|
|
#include "curl-shim.h"
|
|
#else
|
|
#include <curl/curl.h>
|
|
#endif
|
|
#include "keyserver.h"
|
|
#include "ksutil.h"
|
|
|
|
extern char *optarg;
|
|
extern int optind;
|
|
|
|
static char proxy[MAX_PROXY+1];
|
|
static FILE *input,*output,*console;
|
|
static CURL *curl;
|
|
static struct ks_options *opt;
|
|
|
|
static int
|
|
curl_err_to_gpg_err(CURLcode error)
|
|
{
|
|
switch(error)
|
|
{
|
|
case CURLE_FTP_COULDNT_RETR_FILE: return KEYSERVER_KEY_NOT_FOUND;
|
|
default: return KEYSERVER_INTERNAL_ERROR;
|
|
}
|
|
}
|
|
|
|
static size_t
|
|
writer(const void *ptr,size_t size,size_t nmemb,void *stream)
|
|
{
|
|
const char *buf=ptr;
|
|
size_t i;
|
|
static int markeridx=0,begun=0,done=0;
|
|
static const char *marker=BEGIN;
|
|
|
|
/* scan the incoming data for our marker */
|
|
for(i=0;!done && i<(size*nmemb);i++)
|
|
{
|
|
if(buf[i]==marker[markeridx])
|
|
{
|
|
markeridx++;
|
|
if(marker[markeridx]=='\0')
|
|
{
|
|
if(begun)
|
|
done=1;
|
|
else
|
|
{
|
|
/* We've found the BEGIN marker, so now we're looking
|
|
for the END marker. */
|
|
begun=1;
|
|
marker=END;
|
|
markeridx=0;
|
|
fprintf(output,BEGIN);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
markeridx=0;
|
|
|
|
if(begun)
|
|
{
|
|
/* Canonicalize CRLF to just LF by stripping CRs. This
|
|
actually makes sense, since on Unix-like machines LF is
|
|
correct, and on win32-like machines, our output buffer is
|
|
opened in textmode and will re-canonicalize line endings
|
|
back to CRLF. Since we only need to handle armored keys,
|
|
we don't have to worry about odd cases like CRCRCR and
|
|
the like. */
|
|
|
|
if(buf[i]!='\r')
|
|
fputc(buf[i],output);
|
|
}
|
|
}
|
|
|
|
return size*nmemb;
|
|
}
|
|
|
|
static int
|
|
get_key(char *getkey)
|
|
{
|
|
CURLcode res;
|
|
char errorbuffer[CURL_ERROR_SIZE];
|
|
char request[MAX_URL];
|
|
|
|
if(strncmp(getkey,"0x",2)==0)
|
|
getkey+=2;
|
|
|
|
fprintf(output,"KEY 0x%s BEGIN\n",getkey);
|
|
|
|
sprintf(request,"%s://%s%s%s%s%s%s",opt->scheme,
|
|
opt->auth?opt->auth:"",
|
|
opt->auth?"@":"",opt->host,
|
|
opt->port?":":"",opt->port?opt->port:"",
|
|
opt->path?opt->path:"/");
|
|
|
|
curl_easy_setopt(curl,CURLOPT_URL,request);
|
|
curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,writer);
|
|
curl_easy_setopt(curl,CURLOPT_FILE,output);
|
|
curl_easy_setopt(curl,CURLOPT_ERRORBUFFER,errorbuffer);
|
|
|
|
res=curl_easy_perform(curl);
|
|
if(res!=0)
|
|
{
|
|
fprintf(console,"gpgkeys: %s fetch error %d: %s\n",opt->scheme,
|
|
res,errorbuffer);
|
|
fprintf(output,"\nKEY 0x%s FAILED %d\n",getkey,curl_err_to_gpg_err(res));
|
|
}
|
|
else
|
|
fprintf(output,"\nKEY 0x%s END\n",getkey);
|
|
|
|
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,ret=KEYSERVER_INTERNAL_ERROR;
|
|
char line[MAX_LINE];
|
|
char *thekey=NULL;
|
|
long follow_redirects=5;
|
|
|
|
console=stderr;
|
|
|
|
/* Kludge to implement standard GNU options. */
|
|
if (argc > 1 && !strcmp (argv[1], "--version"))
|
|
{
|
|
fputs ("gpgkeys_curl (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,"wb");
|
|
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;
|
|
|
|
opt=init_ks_options();
|
|
if(!opt)
|
|
return KEYSERVER_NO_MEMORY;
|
|
|
|
/* Get the command and info block */
|
|
|
|
while(fgets(line,MAX_LINE,input)!=NULL)
|
|
{
|
|
int err;
|
|
char option[MAX_OPTION+1];
|
|
|
|
if(line[0]=='\n')
|
|
break;
|
|
|
|
err=parse_ks_options(line,opt);
|
|
if(err>0)
|
|
{
|
|
ret=err;
|
|
goto fail;
|
|
}
|
|
else if(err==0)
|
|
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(strncasecmp(start,"http-proxy",10)==0)
|
|
{
|
|
if(no)
|
|
proxy[0]='\0';
|
|
else if(start[10]=='=')
|
|
{
|
|
strncpy(proxy,&start[11],MAX_PROXY);
|
|
proxy[MAX_PROXY]='\0';
|
|
}
|
|
}
|
|
else if(strncasecmp(start,"follow-redirects",16)==0)
|
|
{
|
|
if(no)
|
|
follow_redirects=0;
|
|
else if(start[16]=='=')
|
|
follow_redirects=atoi(&start[17]);
|
|
else if(start[16]=='\0')
|
|
follow_redirects=-1;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if(!opt->scheme)
|
|
{
|
|
fprintf(console,"gpgkeys: no scheme supplied!\n");
|
|
ret=KEYSERVER_SCHEME_NOT_FOUND;
|
|
goto fail;
|
|
}
|
|
#ifdef HTTP_VIA_LIBCURL
|
|
else if(strcasecmp(opt->scheme,"http")==0)
|
|
;
|
|
#endif /* HTTP_VIA_LIBCURL */
|
|
#ifdef HTTPS_VIA_LIBCURL
|
|
else if(strcasecmp(opt->scheme,"https")==0)
|
|
;
|
|
#endif /* HTTP_VIA_LIBCURL */
|
|
#ifdef FTP_VIA_LIBCURL
|
|
else if(strcasecmp(opt->scheme,"ftp")==0)
|
|
;
|
|
#endif /* FTP_VIA_LIBCURL */
|
|
#ifdef FTPS_VIA_LIBCURL
|
|
else if(strcasecmp(opt->scheme,"ftps")==0)
|
|
;
|
|
#endif /* FTPS_VIA_LIBCURL */
|
|
else
|
|
{
|
|
fprintf(console,"gpgkeys: scheme `%s' not supported\n",opt->scheme);
|
|
return KEYSERVER_SCHEME_NOT_FOUND;
|
|
}
|
|
|
|
if(!opt->host)
|
|
{
|
|
fprintf(console,"gpgkeys: no keyserver host provided\n");
|
|
goto fail;
|
|
}
|
|
|
|
if(opt->timeout && register_timeout()==-1)
|
|
{
|
|
fprintf(console,"gpgkeys: unable to register timeout handler\n");
|
|
return KEYSERVER_INTERNAL_ERROR;
|
|
}
|
|
|
|
curl_global_init(CURL_GLOBAL_DEFAULT);
|
|
curl=curl_easy_init();
|
|
if(!curl)
|
|
{
|
|
fprintf(console,"gpgkeys: unable to initialize curl\n");
|
|
ret=KEYSERVER_INTERNAL_ERROR;
|
|
goto fail;
|
|
}
|
|
|
|
if(follow_redirects)
|
|
{
|
|
curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,1);
|
|
if(follow_redirects>0)
|
|
curl_easy_setopt(curl,CURLOPT_MAXREDIRS,follow_redirects);
|
|
}
|
|
|
|
if(opt->debug)
|
|
{
|
|
curl_easy_setopt(curl,CURLOPT_STDERR,console);
|
|
curl_easy_setopt(curl,CURLOPT_VERBOSE,1);
|
|
}
|
|
|
|
curl_easy_setopt(curl,CURLOPT_SSL_VERIFYPEER,opt->flags.check_cert);
|
|
curl_easy_setopt(curl,CURLOPT_CAINFO,opt->ca_cert_file);
|
|
|
|
if(proxy[0])
|
|
curl_easy_setopt(curl,CURLOPT_PROXY,proxy);
|
|
|
|
/* 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(opt->action==KS_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)
|
|
{
|
|
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(opt->verbose)
|
|
{
|
|
fprintf(console,"Scheme:\t\t%s\n",opt->scheme);
|
|
fprintf(console,"Host:\t\t%s\n",opt->host);
|
|
if(opt->port)
|
|
fprintf(console,"Port:\t\t%s\n",opt->port);
|
|
if(opt->path)
|
|
fprintf(console,"Path:\t\t%s\n",opt->path);
|
|
fprintf(console,"Command:\tGET\n");
|
|
}
|
|
|
|
set_timeout(opt->timeout);
|
|
|
|
ret=get_key(thekey);
|
|
|
|
fail:
|
|
|
|
free(thekey);
|
|
|
|
if(input!=stdin)
|
|
fclose(input);
|
|
|
|
if(output!=stdout)
|
|
fclose(output);
|
|
|
|
free_ks_options(opt);
|
|
|
|
if(curl)
|
|
curl_easy_cleanup(curl);
|
|
|
|
curl_global_cleanup();
|
|
|
|
return ret;
|
|
}
|