mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-23 10:29:58 +01:00
ccab129be5
stays up to date. * gpgkeys_http.c: Don't need to define HTTP_PROXY_ENV here since it's in ksutil.h. * gpgkeys_curl.c (get_key, main), gpgkeys_hkp.c (main): Pass AUTH values to curl or curl-shim. * curl-shim.c (curl_easy_perform), gpgkeys_curl.c (main), gpgkeys_hkp.c (main): Use curl-style proxy semantics.
716 lines
15 KiB
C
716 lines
15 KiB
C
/* gpgkeys_hkp.c - talk to an HKP keyserver
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* Copyright (C) 2001, 2002, 2003, 2004, 2005 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 2 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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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 FAKE_CURL
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#include "curl-shim.h"
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#else
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#include <curl/curl.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 char errorbuffer[CURL_ERROR_SIZE];
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static size_t
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curl_mrindex_writer(const void *ptr,size_t size,size_t nmemb,void *stream)
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{
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static int checked=0,swallow=0;
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if(!checked)
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{
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/* If the document begins with a '<', assume it's a HTML
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response, which we don't support. Discard the whole message
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body. GPG can handle it, but this is an optimization to deal
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with it on this side of the pipe. */
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const char *buf=ptr;
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if(buf[0]=='<')
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swallow=1;
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checked=1;
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}
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if(swallow || fwrite(ptr,size,nmemb,stream)==nmemb)
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return size*nmemb;
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else
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return 0;
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}
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/* Append but avoid creating a double slash // in the path. */
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static char *
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append_path(char *dest,const char *src)
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{
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size_t n=strlen(dest);
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if(src[0]=='/' && n>0 && dest[n-1]=='/')
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dest[n-1]='\0';
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return strcat(dest,src);
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}
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int
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send_key(int *eof)
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{
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CURLcode res;
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char request[MAX_URL+15];
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int begin=0,end=0,ret=KEYSERVER_INTERNAL_ERROR;
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char keyid[17];
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char line[MAX_LINE];
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char *key,*encoded_key=NULL;
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size_t keylen=8,keymax=8;
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key=malloc(9);
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if(!key)
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{
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fprintf(console,"gpgkeys: out of memory\n");
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ret=KEYSERVER_NO_MEMORY;
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goto fail;
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}
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strcpy(key,"keytext=");
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/* Read and throw away input until we see the BEGIN */
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while(fgets(line,MAX_LINE,input)!=NULL)
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if(sscanf(line,"KEY %16s BEGIN\n",keyid)==1)
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{
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begin=1;
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break;
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}
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if(!begin)
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{
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/* i.e. eof before the KEY BEGIN was found. This isn't an
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error. */
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*eof=1;
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ret=KEYSERVER_OK;
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goto fail;
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}
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/* Now slurp up everything until we see the END */
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while(fgets(line,MAX_LINE,input))
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if(sscanf(line,"KEY %16s END\n",keyid)==1)
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{
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end=1;
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break;
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}
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else
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{
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if(strlen(line)+keylen>keymax)
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{
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char *tmp;
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keymax+=200;
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tmp=realloc(key,keymax+1);
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if(!tmp)
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{
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free(key);
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fprintf(console,"gpgkeys: out of memory\n");
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ret=KEYSERVER_NO_MEMORY;
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goto fail;
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}
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key=tmp;
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}
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strcpy(&key[keylen],line);
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keylen+=strlen(line);
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}
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if(!end)
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{
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fprintf(console,"gpgkeys: no KEY %s END found\n",keyid);
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*eof=1;
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ret=KEYSERVER_KEY_INCOMPLETE;
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goto fail;
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}
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encoded_key=curl_escape(key,keylen);
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if(!encoded_key)
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{
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fprintf(console,"gpgkeys: out of memory\n");
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ret=KEYSERVER_NO_MEMORY;
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goto fail;
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}
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strcpy(request,"http://");
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strcat(request,opt->host);
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strcat(request,":");
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if(opt->port)
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strcat(request,opt->port);
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else
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strcat(request,"11371");
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strcat(request,opt->path);
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/* request is MAX_URL+15 bytes long - MAX_URL covers the whole URL,
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including any supplied path. The 15 covers /pks/add. */
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append_path(request,"/pks/add");
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if(opt->verbose>2)
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fprintf(console,"gpgkeys: HTTP URL is `%s'\n",request);
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curl_easy_setopt(curl,CURLOPT_URL,request);
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curl_easy_setopt(curl,CURLOPT_POST,1);
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curl_easy_setopt(curl,CURLOPT_POSTFIELDS,encoded_key);
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curl_easy_setopt(curl,CURLOPT_FAILONERROR,1);
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res=curl_easy_perform(curl);
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if(res!=0)
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{
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fprintf(console,"gpgkeys: HTTP post error %d: %s\n",res,errorbuffer);
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ret=curl_err_to_gpg_err(res);
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}
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else
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fprintf(output,"\nKEY %s SENT\n",keyid);
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ret=KEYSERVER_OK;
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fail:
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free(key);
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curl_free(encoded_key);
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if(ret!=0 && begin)
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fprintf(output,"KEY %s FAILED %d\n",keyid,ret);
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return ret;
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}
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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 request[MAX_URL+60];
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char *offset;
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struct curl_writer_ctx ctx;
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memset(&ctx,0,sizeof(ctx));
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/* Build the search string. HKP only uses the short key IDs. */
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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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if(strlen(getkey)==32)
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{
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fprintf(console,
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"gpgkeys: HKP keyservers do not support v3 fingerprints\n");
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fprintf(output,"KEY 0x%s FAILED %d\n",getkey,KEYSERVER_NOT_SUPPORTED);
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return KEYSERVER_NOT_SUPPORTED;
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}
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strcpy(request,"http://");
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strcat(request,opt->host);
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strcat(request,":");
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if(opt->port)
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strcat(request,opt->port);
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else
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strcat(request,"11371");
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strcat(request,opt->path);
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/* request is MAX_URL+55 bytes long - MAX_URL covers the whole URL,
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including any supplied path. The 60 overcovers this /pks/... etc
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string plus the 8 bytes of key id */
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append_path(request,"/pks/lookup?op=get&options=mr&search=0x");
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/* fingerprint or long key id. Take the last 8 characters and treat
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it like a short key id */
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if(strlen(getkey)>8)
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offset=&getkey[strlen(getkey)-8];
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else
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offset=getkey;
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strcat(request,offset);
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if(opt->verbose>2)
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fprintf(console,"gpgkeys: HTTP URL is `%s'\n",request);
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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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res=curl_easy_perform(curl);
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if(res!=0)
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{
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fprintf(console,"gpgkeys: HTTP fetch error %d: %s\n",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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if(ctx.done)
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fprintf(output,"\nKEY 0x%s END\n",getkey);
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else
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{
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fprintf(console,"gpgkeys: key %s not found on keyserver\n",getkey);
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fprintf(output,"KEY 0x%s FAILED %d\n",
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getkey,KEYSERVER_KEY_NOT_FOUND);
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}
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}
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return KEYSERVER_OK;
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}
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int
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search_key(char *searchkey)
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{
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CURLcode res;
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char *request;
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char *searchkey_encoded;
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int ret=KEYSERVER_INTERNAL_ERROR;
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searchkey_encoded=curl_escape(searchkey,0);
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request=malloc(MAX_URL+50+strlen(searchkey_encoded));
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if(!request)
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{
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fprintf(console,"gpgkeys: out of memory\n");
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ret=KEYSERVER_NO_MEMORY;
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goto fail;
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}
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fprintf(output,"SEARCH %s BEGIN\n",searchkey);
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strcpy(request,"http://");
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strcat(request,opt->host);
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strcat(request,":");
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if(opt->port)
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strcat(request,opt->port);
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else
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strcat(request,"11371");
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strcat(request,opt->path);
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append_path(request,"/pks/lookup?op=index&options=mr&search=");
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strcat(request,searchkey_encoded);
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if(opt->verbose>2)
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fprintf(console,"gpgkeys: HTTP URL is `%s'\n",request);
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curl_easy_setopt(curl,CURLOPT_URL,request);
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curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,curl_mrindex_writer);
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curl_easy_setopt(curl,CURLOPT_FILE,output);
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res=curl_easy_perform(curl);
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if(res!=0)
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{
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fprintf(console,"gpgkeys: HTTP search error %d: %s\n",res,errorbuffer);
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ret=curl_err_to_gpg_err(res);
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}
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else
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{
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fprintf(output,"\nSEARCH %s END\n",searchkey);
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ret=KEYSERVER_OK;
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}
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fail:
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curl_free(searchkey_encoded);
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free(request);
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if(ret!=KEYSERVER_OK)
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fprintf(output,"\nSEARCH %s FAILED %d\n",searchkey,ret);
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return ret;
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}
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void
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fail_all(struct keylist *keylist,int err)
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{
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if(!keylist)
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return;
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if(opt->action==KS_SEARCH)
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{
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fprintf(output,"SEARCH ");
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while(keylist)
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{
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fprintf(output,"%s ",keylist->str);
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keylist=keylist->next;
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}
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fprintf(output,"FAILED %d\n",err);
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}
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else
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while(keylist)
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{
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fprintf(output,"KEY %s FAILED %d\n",keylist->str,err);
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keylist=keylist->next;
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}
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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\thelp\n");
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fprintf (fp,"-V\tversion\n");
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fprintf (fp,"-o\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;
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char line[MAX_LINE];
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int failed=0;
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struct keylist *keylist=NULL,*keyptr=NULL;
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char *proxy=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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fputs ("gpgkeys_hkp (GnuPG) " VERSION"\n", stdout);
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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,"w");
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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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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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#if 0
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else if(strcasecmp(start,"try-dns-srv")==0)
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{
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if(no)
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http_flags&=~HTTP_FLAG_TRY_SRV;
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else
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http_flags|=HTTP_FLAG_TRY_SRV;
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}
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#endif
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continue;
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}
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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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curl_easy_setopt(curl,CURLOPT_ERRORBUFFER,errorbuffer);
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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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curl_easy_setopt(curl,CURLOPT_STDERR,console);
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curl_easy_setopt(curl,CURLOPT_VERBOSE,1);
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}
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if(proxy)
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curl_easy_setopt(curl,CURLOPT_PROXY,proxy);
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#if 0
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/* By suggested convention, if the user gives a :port, then disable
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SRV. */
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if(opt->port)
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http_flags&=~HTTP_FLAG_TRY_SRV;
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#endif
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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_SEND)
|
|
while(fgets(line,MAX_LINE,input)!=NULL && line[0]!='\n');
|
|
else if(opt->action==KS_GET || opt->action==KS_SEARCH)
|
|
{
|
|
for(;;)
|
|
{
|
|
struct keylist *work;
|
|
|
|
if(fgets(line,MAX_LINE,input)==NULL)
|
|
break;
|
|
else
|
|
{
|
|
if(line[0]=='\n' || line[0]=='\0')
|
|
break;
|
|
|
|
work=malloc(sizeof(struct keylist));
|
|
if(work==NULL)
|
|
{
|
|
fprintf(console,"gpgkeys: out of memory while "
|
|
"building key list\n");
|
|
ret=KEYSERVER_NO_MEMORY;
|
|
goto fail;
|
|
}
|
|
|
|
strcpy(work->str,line);
|
|
|
|
/* Trim the trailing \n */
|
|
work->str[strlen(line)-1]='\0';
|
|
|
|
work->next=NULL;
|
|
|
|
/* Always attach at the end to keep the list in proper
|
|
order for searching */
|
|
if(keylist==NULL)
|
|
keylist=work;
|
|
else
|
|
keyptr->next=work;
|
|
|
|
keyptr=work;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf(console,"gpgkeys: no keyserver command specified\n");
|
|
goto fail;
|
|
}
|
|
|
|
/* Send the response */
|
|
|
|
fprintf(output,"VERSION %d\n",KEYSERVER_PROTO_VERSION);
|
|
fprintf(output,"PROGRAM %s\n\n",VERSION);
|
|
|
|
if(opt->verbose>1)
|
|
{
|
|
fprintf(console,"Host:\t\t%s\n",opt->host);
|
|
if(opt->port)
|
|
fprintf(console,"Port:\t\t%s\n",opt->port);
|
|
if(strcmp(opt->path,"/")!=0)
|
|
fprintf(console,"Path:\t\t%s\n",opt->path);
|
|
fprintf(console,"Command:\t%s\n",ks_action_to_string(opt->action));
|
|
}
|
|
|
|
if(opt->action==KS_GET)
|
|
{
|
|
keyptr=keylist;
|
|
|
|
while(keyptr!=NULL)
|
|
{
|
|
set_timeout(opt->timeout);
|
|
|
|
if(get_key(keyptr->str)!=KEYSERVER_OK)
|
|
failed++;
|
|
|
|
keyptr=keyptr->next;
|
|
}
|
|
}
|
|
else if(opt->action==KS_SEND)
|
|
{
|
|
int eof=0;
|
|
|
|
do
|
|
{
|
|
set_timeout(opt->timeout);
|
|
|
|
if(send_key(&eof)!=KEYSERVER_OK)
|
|
failed++;
|
|
}
|
|
while(!eof);
|
|
}
|
|
else if(opt->action==KS_SEARCH)
|
|
{
|
|
char *searchkey=NULL;
|
|
int len=0;
|
|
|
|
set_timeout(opt->timeout);
|
|
|
|
/* To search, we stick a space in between each key to search
|
|
for. */
|
|
|
|
keyptr=keylist;
|
|
while(keyptr!=NULL)
|
|
{
|
|
len+=strlen(keyptr->str)+1;
|
|
keyptr=keyptr->next;
|
|
}
|
|
|
|
searchkey=malloc(len+1);
|
|
if(searchkey==NULL)
|
|
{
|
|
ret=KEYSERVER_NO_MEMORY;
|
|
fail_all(keylist,KEYSERVER_NO_MEMORY);
|
|
goto fail;
|
|
}
|
|
|
|
searchkey[0]='\0';
|
|
|
|
keyptr=keylist;
|
|
while(keyptr!=NULL)
|
|
{
|
|
strcat(searchkey,keyptr->str);
|
|
strcat(searchkey," ");
|
|
keyptr=keyptr->next;
|
|
}
|
|
|
|
/* Nail that last space */
|
|
if(*searchkey)
|
|
searchkey[strlen(searchkey)-1]='\0';
|
|
|
|
if(search_key(searchkey)!=KEYSERVER_OK)
|
|
failed++;
|
|
|
|
free(searchkey);
|
|
}
|
|
else
|
|
abort();
|
|
|
|
if(!failed)
|
|
ret=KEYSERVER_OK;
|
|
|
|
fail:
|
|
while(keylist!=NULL)
|
|
{
|
|
struct keylist *current=keylist;
|
|
keylist=keylist->next;
|
|
free(current);
|
|
}
|
|
|
|
if(input!=stdin)
|
|
fclose(input);
|
|
|
|
if(output!=stdout)
|
|
fclose(output);
|
|
|
|
free_ks_options(opt);
|
|
|
|
if(curl)
|
|
curl_easy_cleanup(curl);
|
|
|
|
free(proxy);
|
|
|
|
return ret;
|
|
}
|