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FTP keyserver support via gpgkeys_ftp. This is currently off by default.

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This commit is contained in:
David Shaw 2004-12-21 23:39:57 +00:00
parent b883e9642b
commit 95b8456f34
5 changed files with 402 additions and 7 deletions
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6
keyserver/ChangeLog
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@ -1,3 +1,9 @@
2004-12-21 David Shaw <dshaw@jabberwocky.com>
* gpgkeys_ftp.c: New.
* Makefile.am: Build it if requested.
2004-12-14 Werner Koch <wk@g10code.com>
* Makefile.am (install-exec-hook, uninstall-hook): Removed. For

15
keyserver/Makefile.am
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@ -19,11 +19,11 @@
## Process this file with automake to produce Makefile.in
INCLUDES = -I$(top_srcdir)/include -I$(top_srcdir)/intl
EXTRA_PROGRAMS = gpgkeys_ldap gpgkeys_hkp gpgkeys_http gpgkeys_finger
EXTRA_PROGRAMS = gpgkeys_ldap gpgkeys_hkp gpgkeys_http gpgkeys_finger gpgkeys_ftp
EXTRA_SCRIPTS = gpgkeys_mailto
libexecdir = @libexecdir@/@PACKAGE@
libexec_PROGRAMS = @GPGKEYS_LDAP@ @GPGKEYS_HKP@ @GPGKEYS_HTTP@ @GPGKEYS_FINGER@
libexec_PROGRAMS = @GPGKEYS_LDAP@ @GPGKEYS_HKP@ @GPGKEYS_HTTP@ @GPGKEYS_FINGER@ @GPGKEYS_FTP@
libexec_SCRIPTS = @GPGKEYS_MAILTO@
noinst_SCRIPTS = gpgkeys_test
@ -31,12 +31,13 @@ gpgkeys_ldap_SOURCES = gpgkeys_ldap.c ksutil.c ksutil.h
gpgkeys_hkp_SOURCES = gpgkeys_hkp.c ksutil.c ksutil.h
gpgkeys_http_SOURCES = gpgkeys_http.c ksutil.c ksutil.h
gpgkeys_finger_SOURCES = gpgkeys_finger.c ksutil.c ksutil.h
gpgkeys_ftp_SOURCES = gpgkeys_ftp.c ksutil.c ksutil.h
other_libs = $(LIBICONV) $(LIBINTL) $(CAPLIBS)
gpgkeys_ldap_LDADD = ../util/libutil.a @LDAPLIBS@ @NETLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_hkp_LDADD = ../util/libutil.a @NETLIBS@ @SRVLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_http_LDADD = ../util/libutil.a @NETLIBS@ @SRVLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_ldap_LDADD = ../util/libutil.a @LDAPLIBS@ @NETLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_hkp_LDADD = ../util/libutil.a @NETLIBS@ @SRVLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_http_LDADD = ../util/libutil.a @NETLIBS@ @SRVLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_finger_LDADD = ../util/libutil.a @NETLIBS@ $(other_libs) @GETOPT@ @W32LIBS@
gpgkeys_ftp_CPPFLAGS = @LIBCURL_INCLUDES@
gpgkeys_ftp_LDADD = @LIBCURL@ @GETOPT@

343
keyserver/gpgkeys_ftp.c Normal file
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@ -0,0 +1,343 @@
/* gpgkeys_ftp.c - fetch a key via FTP
* Copyright (C) 2004 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
#include <curl/curl.h>
#include "keyserver.h"
#include "ksutil.h"
extern char *optarg;
extern int optind;
#define GET 0
#define MAX_LINE 80
#define MAX_PATH 1023
#define MAX_HOST 79
#define MAX_PORT 9
#define MAX_URL (3+3+MAX_HOST+1+1+MAX_PORT+1+1+MAX_PATH+1+50)
#define STRINGIFY(x) #x
#define MKSTRING(x) STRINGIFY(x)
static int verbose=0;
static char host[MAX_HOST+1]={'\0'},port[MAX_PORT+1]={'\0'},path[MAX_PATH+1]={'\0'};
static FILE *input=NULL,*output=NULL,*console=NULL;
static CURL *curl;
static char request[MAX_URL]={'\0'};
static int
get_key(char *getkey)
{
CURLcode res;
char errorbuffer[CURL_ERROR_SIZE];
if(strncmp(getkey,"0x",2)==0)
getkey+=2;
fprintf(output,"KEY 0x%s BEGIN\n",getkey);
sprintf(request,"ftp://%s%s%s%s%s",host,port[0]?":":"",
port[0]?port:"",path[0]?"":"/",path);
curl_easy_setopt(curl,CURLOPT_URL,request);
curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,fwrite);
curl_easy_setopt(curl,CURLOPT_WRITEDATA,output);
curl_easy_setopt(curl,CURLOPT_ERRORBUFFER,errorbuffer);
if(verbose>2)
{
curl_easy_setopt(curl,CURLOPT_STDERR,console);
curl_easy_setopt(curl,CURLOPT_VERBOSE,TRUE);
}
res=curl_easy_perform(curl);
if(res!=0)
{
fprintf(console,"gpgkeys: FTP fetch error %d: %s\n",res,errorbuffer);
fprintf(output,"KEY 0x%s FAILED %d\n",getkey,
(res==CURLE_FTP_COULDNT_RETR_FILE)?KEYSERVER_KEY_NOT_FOUND:
KEYSERVER_INTERNAL_ERROR);
}
else
fprintf(output,"KEY 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,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_ftp (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 commandstr[7];
char optionstr[256];
char hash;
if(line[0]=='\n')
break;
if(sscanf(line,"%c",&hash)==1 && hash=='#')
continue;
if(sscanf(line,"COMMAND %6s\n",commandstr)==1)
{
commandstr[6]='\0';
if(strcasecmp(commandstr,"get")==0)
action=GET;
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(MAX_PATH) "s\n",path)==1)
{
path[MAX_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 %255s\n",optionstr)==1)
{
int no=0;
char *start=&optionstr[0];
optionstr[255]='\0';
if(strncasecmp(optionstr,"no-",3)==0)
{
no=1;
start=&optionstr[3];
}
if(strcasecmp(start,"verbose")==0)
{
if(no)
verbose--;
else
verbose++;
}
else if(strncasecmp(start,"timeout",7)==0)
{
if(no)
timeout=0;
else
timeout=atoi(&start[8]);
}
continue;
}
}
if(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 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);
curl_easy_cleanup(curl);
fail:
free(thekey);
if(input!=stdin)
fclose(input);
if(output!=stdout)
fclose(output);
curl_global_cleanup();
return ret;
}

4
m4/ChangeLog
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@ -1,3 +1,7 @@
2004-12-21 David Shaw <dshaw@jabberwocky.com>
* libcurl.m4: New.
2004-12-18 David Shaw <dshaw@jabberwocky.com>
* readline.m4: New.

41
m4/libcurl.m4 Normal file
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@ -0,0 +1,41 @@
dnl Check for libcurl and dependencies
dnl Copyright (C) 2004 Free Software Foundation, Inc.
dnl
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.
dnl
dnl Defines HAVE_LIBCURL to 1 if a working curl setup is found, and sets
dnl @LIBCURL@ and @LIBCURL_INCLUDES@ to the necessary values.
dnl $have_libcurl is set to yes or no so other things in configure can
dnl make use of it.
AC_DEFUN([GNUPG_CHECK_LIBCURL],
[
AC_ARG_WITH(libcurl,
AC_HELP_STRING([--with-libcurl=DIR],[look for the curl library in DIR]),
[_do_libcurl=$withval],[_do_libcurl=yes])
if test "$_do_libcurl" != "no" ; then
if test -d "$withval" ; then
CPPFLAGS="${CPPFLAGS} -I$withval/include"
LDFLAGS="${LDFLAGS} -L$withval/lib"
fi
AC_MSG_CHECKING([for libcurl])
if eval curl-config --version 2>/dev/null >/dev/null; then
AC_SUBST([LIBCURL_INCLUDES],[`curl-config --cflags`])
AC_SUBST([LIBCURL],[`curl-config --libs`])
have_libcurl=yes
else
have_libcurl=no
fi
AC_MSG_RESULT([$have_libcurl])
unset _do_libcurl
fi
])dnl