mirror of
git://git.gnupg.org/gnupg.git
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096e7457ec
The asymmetric quotes used by GNU in the past (`...') don't render
nicely on modern systems. We now use two \x27 characters ('...').
The proper solution would be to use the correct Unicode symmetric
quotes here. However this has the disadvantage that the system
requires Unicode support. We don't want that today. If Unicode is
available a generated po file can be used to output proper quotes. A
simple sed script like the one used for en@quote is sufficient to
change them.
The changes have been done by applying
sed -i "s/\`\([^'\`]*\)'/'\1'/g"
to most files and fixing obvious problems by hand. The msgid strings in
the po files were fixed with a similar command.
420 lines
9.8 KiB
C
420 lines
9.8 KiB
C
/* gpgkeys_curl.c - fetch a key via libcurl
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* In addition, as a special exception, the Free Software Foundation
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* gives permission to link the code of the keyserver helper tools:
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* gpgkeys_ldap, gpgkeys_curl and gpgkeys_hkp with the OpenSSL
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* project's "OpenSSL" library (or with modified versions of it that
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* use the same license as the "OpenSSL" library), and distribute the
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* linked executables. You must obey the GNU General Public License
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* in all respects for all of the code used other than "OpenSSL". If
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* you modify this file, you may extend this exception to your version
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* of the file, but you are not obligated to do so. If you do not
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* wish to do so, delete this exception statement from your version.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#ifdef HAVE_LIBCURL
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#include <curl/curl.h>
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#else
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#include "curl-shim.h"
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#endif
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#include "keyserver.h"
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#include "ksutil.h"
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extern char *optarg;
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extern int optind;
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static FILE *input,*output,*console;
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static CURL *curl;
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static struct ks_options *opt;
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static int
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get_key(char *getkey)
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{
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CURLcode res;
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char errorbuffer[CURL_ERROR_SIZE];
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char request[MAX_URL];
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struct curl_writer_ctx ctx;
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memset(&ctx,0,sizeof(ctx));
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if(strncmp(getkey,"0x",2)==0)
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getkey+=2;
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fprintf(output,"KEY 0x%s BEGIN\n",getkey);
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sprintf(request,"%s://%s%s%s%s",opt->scheme,opt->host,
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opt->port?":":"",opt->port?opt->port:"",opt->path?opt->path:"/");
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curl_easy_setopt(curl,CURLOPT_URL,request);
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curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,curl_writer);
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ctx.stream=output;
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curl_easy_setopt(curl,CURLOPT_FILE,&ctx);
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curl_easy_setopt(curl,CURLOPT_ERRORBUFFER,errorbuffer);
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res=curl_easy_perform(curl);
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if(res!=CURLE_OK)
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{
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fprintf(console,"gpgkeys: %s fetch error %d: %s\n",opt->scheme,
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res,errorbuffer);
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fprintf(output,"\nKEY 0x%s FAILED %d\n",getkey,curl_err_to_gpg_err(res));
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}
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else
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{
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curl_writer_finalize(&ctx);
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if(!ctx.flags.done)
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{
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fprintf(console,"gpgkeys: no key data found for %s\n",request);
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fprintf(output,"\nKEY 0x%s FAILED %d\n",
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getkey,KEYSERVER_KEY_NOT_FOUND);
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}
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else
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fprintf(output,"\nKEY 0x%s END\n",getkey);
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}
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return curl_err_to_gpg_err(res);
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}
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static void
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show_help (FILE *fp)
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{
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fprintf (fp,"-h, --help\thelp\n");
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fprintf (fp,"-V\t\tmachine readable version\n");
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fprintf (fp,"--version\thuman readable version\n");
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fprintf (fp,"-o\t\toutput to this file\n");
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}
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int
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main(int argc,char *argv[])
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{
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int arg,ret=KEYSERVER_INTERNAL_ERROR,i;
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char line[MAX_LINE];
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char *thekey=NULL;
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long follow_redirects=5;
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char *proxy=NULL;
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curl_version_info_data *curldata;
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struct curl_slist *headers=NULL;
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console=stderr;
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/* Kludge to implement standard GNU options. */
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if (argc > 1 && !strcmp (argv[1], "--version"))
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{
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printf ("gpgkeys_curl (GnuPG) %s\n", VERSION);
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printf ("Uses: %s\n", curl_version());
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return 0;
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}
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else if (argc > 1 && !strcmp (argv[1], "--help"))
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{
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show_help (stdout);
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return 0;
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}
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while((arg=getopt(argc,argv,"hVo:"))!=-1)
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switch(arg)
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{
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default:
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case 'h':
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show_help (console);
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return KEYSERVER_OK;
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case 'V':
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fprintf(stdout,"%d\n%s\n",KEYSERVER_PROTO_VERSION,VERSION);
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return KEYSERVER_OK;
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case 'o':
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output=fopen(optarg,"wb");
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if(output==NULL)
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{
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fprintf(console,"gpgkeys: Cannot open output file '%s': %s\n",
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optarg,strerror(errno));
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return KEYSERVER_INTERNAL_ERROR;
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}
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break;
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}
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if(argc>optind)
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{
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input=fopen(argv[optind],"r");
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if(input==NULL)
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{
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fprintf(console,"gpgkeys: Cannot open input file '%s': %s\n",
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argv[optind],strerror(errno));
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return KEYSERVER_INTERNAL_ERROR;
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}
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}
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if(input==NULL)
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input=stdin;
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if(output==NULL)
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output=stdout;
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opt=init_ks_options();
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if(!opt)
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return KEYSERVER_NO_MEMORY;
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/* Get the command and info block */
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while(fgets(line,MAX_LINE,input)!=NULL)
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{
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int err;
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char option[MAX_OPTION+1];
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if(line[0]=='\n')
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break;
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err=parse_ks_options(line,opt);
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if(err>0)
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{
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ret=err;
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goto fail;
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}
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else if(err==0)
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continue;
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if(sscanf(line,"OPTION %" MKSTRING(MAX_OPTION) "s\n",option)==1)
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{
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int no=0;
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char *start=&option[0];
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option[MAX_OPTION]='\0';
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if(strncasecmp(option,"no-",3)==0)
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{
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no=1;
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start=&option[3];
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}
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if(strncasecmp(start,"http-proxy",10)==0)
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{
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/* Safe to not check the return code of strdup() here.
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If it fails, we simply won't use a proxy. */
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if(no)
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{
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free(proxy);
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proxy=strdup("");
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}
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else if(start[10]=='=')
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{
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if(strlen(&start[11])<MAX_PROXY)
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{
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free(proxy);
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proxy=strdup(&start[11]);
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}
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}
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}
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else if(strncasecmp(start,"follow-redirects",16)==0)
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{
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if(no)
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follow_redirects=0;
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else if(start[16]=='=')
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follow_redirects=atoi(&start[17]);
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else if(start[16]=='\0')
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follow_redirects=-1;
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}
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continue;
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}
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}
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if(!opt->scheme)
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{
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fprintf(console,"gpgkeys: no scheme supplied!\n");
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ret=KEYSERVER_SCHEME_NOT_FOUND;
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goto fail;
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}
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if(!opt->host)
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{
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fprintf(console,"gpgkeys: no keyserver host provided\n");
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goto fail;
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}
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if(opt->timeout && register_timeout()==-1)
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{
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fprintf(console,"gpgkeys: unable to register timeout handler\n");
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return KEYSERVER_INTERNAL_ERROR;
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}
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curl_global_init(CURL_GLOBAL_DEFAULT);
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curl=curl_easy_init();
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if(!curl)
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{
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fprintf(console,"gpgkeys: unable to initialize curl\n");
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ret=KEYSERVER_INTERNAL_ERROR;
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goto fail;
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}
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/* Make sure we have the protocol the user is asking for so we can
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print a nicer error message. */
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curldata=curl_version_info(CURLVERSION_NOW);
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for(i=0;curldata->protocols[i];i++)
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if(strcasecmp(curldata->protocols[i],opt->scheme)==0)
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break;
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if(curldata->protocols[i]==NULL)
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{
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fprintf(console,"gpgkeys: protocol '%s' not supported\n",opt->scheme);
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ret=KEYSERVER_SCHEME_NOT_FOUND;
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goto fail;
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}
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if(follow_redirects)
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{
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curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,1L);
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if(follow_redirects>0)
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curl_easy_setopt(curl,CURLOPT_MAXREDIRS,follow_redirects);
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}
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if(opt->auth)
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curl_easy_setopt(curl,CURLOPT_USERPWD,opt->auth);
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if(opt->debug)
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{
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fprintf(console,"gpgkeys: curl version = %s\n",curl_version());
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curl_easy_setopt(curl,CURLOPT_STDERR,console);
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curl_easy_setopt(curl,CURLOPT_VERBOSE,1L);
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}
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curl_easy_setopt(curl,CURLOPT_SSL_VERIFYPEER,(long)opt->flags.check_cert);
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curl_easy_setopt(curl,CURLOPT_CAINFO,opt->ca_cert_file);
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/* Avoid caches to get the most recent copy of the key. This is bug
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#1061. In pre-curl versions of the code, we didn't do it. Then
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we did do it (as a curl default) until curl changed the default.
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Now we're doing it again, but in such a way that changing
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defaults in the future won't impact us. We set both the Pragma
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and Cache-Control versions of the header, so we're good with both
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HTTP 1.0 and 1.1. */
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headers=curl_slist_append(headers,"Pragma: no-cache");
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if(headers)
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headers=curl_slist_append(headers,"Cache-Control: no-cache");
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if(!headers)
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{
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fprintf(console,"gpgkeys: out of memory when building HTTP headers\n");
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ret=KEYSERVER_NO_MEMORY;
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goto fail;
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}
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curl_easy_setopt(curl,CURLOPT_HTTPHEADER,headers);
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if(proxy)
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curl_easy_setopt(curl,CURLOPT_PROXY,proxy);
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/* If it's a GET or a SEARCH, the next thing to come in is the
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keyids. If it's a SEND, then there are no keyids. */
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if(opt->action==KS_GET)
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{
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/* Eat the rest of the file */
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for(;;)
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{
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if(fgets(line,MAX_LINE,input)==NULL)
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break;
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else
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{
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if(line[0]=='\n' || line[0]=='\0')
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break;
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if(!thekey)
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{
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thekey=strdup(line);
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if(!thekey)
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{
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fprintf(console,"gpgkeys: out of memory while "
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"building key list\n");
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ret=KEYSERVER_NO_MEMORY;
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goto fail;
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}
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/* Trim the trailing \n */
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thekey[strlen(line)-1]='\0';
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}
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}
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}
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}
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else
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{
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fprintf(console,
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"gpgkeys: this keyserver type only supports key retrieval\n");
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goto fail;
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}
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if(!thekey)
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{
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fprintf(console,"gpgkeys: invalid keyserver instructions\n");
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goto fail;
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}
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/* Send the response */
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fprintf(output,"VERSION %d\n",KEYSERVER_PROTO_VERSION);
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fprintf(output,"PROGRAM %s\n\n",VERSION);
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if(opt->verbose)
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{
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fprintf(console,"Scheme:\t\t%s\n",opt->scheme);
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fprintf(console,"Host:\t\t%s\n",opt->host);
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if(opt->port)
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fprintf(console,"Port:\t\t%s\n",opt->port);
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if(opt->path)
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fprintf(console,"Path:\t\t%s\n",opt->path);
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fprintf(console,"Command:\tGET\n");
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}
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set_timeout(opt->timeout);
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ret=get_key(thekey);
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fail:
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free(thekey);
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if(input!=stdin)
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fclose(input);
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if(output!=stdout)
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fclose(output);
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free_ks_options(opt);
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curl_slist_free_all(headers);
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if(curl)
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curl_easy_cleanup(curl);
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free(proxy);
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curl_global_cleanup();
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return ret;
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}
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