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gnupg/g10/keyserver.c
David Shaw 0842905be3 * main.h, keylist.c (show_notation): Add argument to show only user 
notations, only standard notations, or both.  Change all callers.

* keyserver.c (keyserver_spawn): We still need EXEC_TEMPFILE_ONLY.
2004-04-29 03:42:54 +00:00

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/* keyserver.c - generic keyserver code
* Copyright (C) 2001, 2002, 2003, 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 <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "filter.h"
#include "keydb.h"
#include "status.h"
#include "exec.h"
#include "main.h"
#include "i18n.h"
#include "iobuf.h"
#include "memory.h"
#include "ttyio.h"
#include "options.h"
#include "packet.h"
#include "keyserver-internal.h"
#include "util.h"
#define GET 0
#define SEND 1
#define SEARCH 2
struct keyrec
{
KEYDB_SEARCH_DESC desc;
time_t createtime,expiretime;
int size,flags;
byte type;
IOBUF uidbuf;
int lines;
};
/* Tell remote processes about these options */
#define REMOTE_TELL (KEYSERVER_INCLUDE_REVOKED|KEYSERVER_INCLUDE_DISABLED|KEYSERVER_INCLUDE_SUBKEYS|KEYSERVER_TRY_DNS_SRV)
static struct parse_options keyserver_opts[]=
{
{"include-revoked",KEYSERVER_INCLUDE_REVOKED,NULL},
{"include-disabled",KEYSERVER_INCLUDE_DISABLED,NULL},
{"include-subkeys",KEYSERVER_INCLUDE_SUBKEYS,NULL},
{"keep-temp-files",KEYSERVER_KEEP_TEMP_FILES,NULL},
{"refresh-add-fake-v3-keyids",KEYSERVER_ADD_FAKE_V3,NULL},
{"auto-key-retrieve",KEYSERVER_AUTO_KEY_RETRIEVE,NULL},
{"try-dns-srv",KEYSERVER_TRY_DNS_SRV,NULL},
{"honor-keyserver-url",KEYSERVER_HONOR_KEYSERVER_URL,NULL},
{NULL,0,NULL}
};
static int keyserver_work(int action,STRLIST list,KEYDB_SEARCH_DESC *desc,
int count,struct keyserver_spec *keyserver);
int
parse_keyserver_options(char *options)
{
int ret=1;
char *tok;
while((tok=optsep(&options)))
{
if(tok[0]=='\0')
continue;
/* We accept quite a few possible options here - some options to
handle specially, the keyserver_options list, and import and
export options that pertain to keyserver operations. Note
that you must use strncasecmp here as there might be an
=argument attached which will foil the use of strcasecmp. */
if(ascii_strncasecmp(tok,"verbose",7)==0)
opt.keyserver_options.verbose++;
else if(ascii_strncasecmp(tok,"no-verbose",10)==0)
opt.keyserver_options.verbose--;
#ifdef EXEC_TEMPFILE_ONLY
else if(ascii_strncasecmp(tok,"use-temp-files",14)==0 ||
ascii_strncasecmp(tok,"no-use-temp-files",17)==0)
log_info(_("WARNING: keyserver option \"%s\" is not used "
"on this platform\n"),tok);
#else
else if(ascii_strncasecmp(tok,"use-temp-files",14)==0)
opt.keyserver_options.options|=KEYSERVER_USE_TEMP_FILES;
else if(ascii_strncasecmp(tok,"no-use-temp-files",17)==0)
opt.keyserver_options.options&=~KEYSERVER_USE_TEMP_FILES;
#endif
else if(!parse_options(tok,&opt.keyserver_options.options,
keyserver_opts,0)
&& !parse_import_options(tok,
&opt.keyserver_options.import_options,0)
&& !parse_export_options(tok,
&opt.keyserver_options.export_options,0))
{
/* All of the standard options have failed, so the option is
destined for a keyserver plugin. */
char *arg=argsplit(tok);
if(arg)
{
char *joined;
joined=m_alloc(strlen(tok)+1+strlen(arg)+1);
/* Make a canonical name=value form with no
spaces */
strcpy(joined,tok);
strcat(joined,"=");
strcat(joined,arg);
add_to_strlist(&opt.keyserver_options.other,joined);
m_free(joined);
}
else
add_to_strlist(&opt.keyserver_options.other,tok);
}
}
return ret;
}
static void
free_keyserver_spec(struct keyserver_spec *keyserver)
{
m_free(keyserver->uri);
m_free(keyserver->host);
m_free(keyserver->port);
m_free(keyserver->opaque);
m_free(keyserver);
}
struct keyserver_spec *
parse_keyserver_uri(char *uri,const char *configname,unsigned int configlineno)
{
int assume_hkp=0;
struct keyserver_spec *keyserver;
char *scheme;
assert(uri!=NULL);
keyserver=m_alloc_clear(sizeof(struct keyserver_spec));
keyserver->uri=m_strdup(uri);
/* Get the scheme */
scheme=strsep(&uri,":");
if(uri==NULL)
{
/* Assume HKP if there is no scheme */
assume_hkp=1;
uri=scheme;
scheme="hkp";
}
else
{
/* Force to lowercase */
char *i;
for(i=scheme;*i!='\0';i++)
*i=ascii_tolower(*i);
}
if(ascii_strcasecmp(scheme,"x-broken-hkp")==0)
{
deprecated_warning(configname,configlineno,"x-broken-hkp",
"--keyserver-options ","broken-http-proxy");
scheme="hkp";
add_to_strlist(&opt.keyserver_options.other,"broken-http-proxy");
}
else if(ascii_strcasecmp(scheme,"x-hkp")==0)
{
/* Canonicalize this to "hkp" so it works with both the internal
and external keyserver interface. */
scheme="hkp";
}
if(scheme[0]=='\0')
goto fail;
keyserver->scheme=m_strdup(scheme);
if(assume_hkp || (uri[0]=='/' && uri[1]=='/'))
{
char *host,*port;
/* Two slashes means network path. */
/* Skip over the "//", if any */
if(!assume_hkp)
uri+=2;
/* Get the host */
host=strsep(&uri,":/");
if(host[0]=='\0')
goto fail;
keyserver->host=m_strdup(host);
if(uri==NULL || uri[0]=='\0')
port=NULL;
else
{
char *ch;
/* Get the port */
port=strsep(&uri,"/");
/* Ports are digits only */
ch=port;
while(*ch!='\0')
{
if(!digitp(ch))
goto fail;
ch++;
}
/* It would seem to be reasonable to limit the range of the
ports to values between 1-65535, but RFC 1738 and 1808
imply there is no limit. Of course, the real world has
limits. */
keyserver->port=m_strdup(port);
}
/* (any path part of the URI is discarded for now as no keyserver
uses it yet) */
}
else if(uri[0]!='/')
{
/* No slash means opaque. Just record the opaque blob and get
out. */
keyserver->opaque=m_strdup(uri);
}
else
{
/* One slash means absolute path. We don't need to support that
yet. */
goto fail;
}
return keyserver;
fail:
free_keyserver_spec(keyserver);
return NULL;
}
static void
print_keyrec(int number,struct keyrec *keyrec)
{
int i;
iobuf_writebyte(keyrec->uidbuf,0);
iobuf_flush_temp(keyrec->uidbuf);
printf("(%d)\t%s ",number,iobuf_get_temp_buffer(keyrec->uidbuf));
if(keyrec->size>0)
printf("%d bit ",keyrec->size);
if(keyrec->type)
{
const char *str=pubkey_algo_to_string(keyrec->type);
if(str)
printf("%s ",str);
else
printf("unknown ");
}
switch(keyrec->desc.mode)
{
/* If the keyserver helper gave us a short keyid, we have no
choice but to use it. Do check --keyid-format to add a 0x if
needed. */
case KEYDB_SEARCH_MODE_SHORT_KID:
printf("key %s%08lX",
(opt.keyid_format==KF_0xSHORT
|| opt.keyid_format==KF_0xLONG)?"0x":"",
(ulong)keyrec->desc.u.kid[1]);
break;
/* However, if it gave us a long keyid, we can honor
--keyid-format */
case KEYDB_SEARCH_MODE_LONG_KID:
printf("key %s",keystr(keyrec->desc.u.kid));
break;
case KEYDB_SEARCH_MODE_FPR16:
printf("key ");
for(i=0;i<16;i++)
printf("%02X",(unsigned char)keyrec->desc.u.fpr[i]);
break;
case KEYDB_SEARCH_MODE_FPR20:
printf("key ");
for(i=0;i<20;i++)
printf("%02X",(unsigned char)keyrec->desc.u.fpr[i]);
break;
default:
BUG();
break;
}
if(keyrec->createtime>0)
printf(", created %s",strtimestamp(keyrec->createtime));
if(keyrec->expiretime>0)
printf(", expires %s",strtimestamp(keyrec->expiretime));
if(keyrec->flags&1)
printf(" (%s)",("revoked"));
if(keyrec->flags&2)
printf(" (%s)",("disabled"));
if(keyrec->flags&4)
printf(" (%s)",("expired"));
printf("\n");
}
/* Returns a keyrec (which must be freed) once a key is complete, and
NULL otherwise. Call with a NULL keystring once key parsing is
complete to return any unfinished keys. */
static struct keyrec *
parse_keyrec(char *keystring)
{
static struct keyrec *work=NULL;
struct keyrec *ret=NULL;
char *record;
int i;
if(keystring==NULL)
{
if(work==NULL)
return NULL;
else if(work->desc.mode==KEYDB_SEARCH_MODE_NONE)
{
m_free(work);
return NULL;
}
else
{
ret=work;
work=NULL;
return ret;
}
}
if(work==NULL)
{
work=m_alloc_clear(sizeof(struct keyrec));
work->uidbuf=iobuf_temp();
}
/* Remove trailing whitespace */
for(i=strlen(keystring);i>0;i--)
if(ascii_isspace(keystring[i-1]))
keystring[i-1]='\0';
else
break;
if((record=strsep(&keystring,":"))==NULL)
return ret;
if(ascii_strcasecmp("pub",record)==0)
{
char *tok;
if(work->desc.mode)
{
ret=work;
work=m_alloc_clear(sizeof(struct keyrec));
work->uidbuf=iobuf_temp();
}
if((tok=strsep(&keystring,":"))==NULL)
return ret;
classify_user_id(tok,&work->desc);
if(work->desc.mode!=KEYDB_SEARCH_MODE_SHORT_KID
&& work->desc.mode!=KEYDB_SEARCH_MODE_LONG_KID
&& work->desc.mode!=KEYDB_SEARCH_MODE_FPR16
&& work->desc.mode!=KEYDB_SEARCH_MODE_FPR20)
{
work->desc.mode=KEYDB_SEARCH_MODE_NONE;
return ret;
}
/* Note all items after this are optional. This allows us to
have a pub line as simple as pub:keyid and nothing else. */
work->lines++;
if((tok=strsep(&keystring,":"))==NULL)
return ret;
work->type=atoi(tok);
if((tok=strsep(&keystring,":"))==NULL)
return ret;
work->size=atoi(tok);
if((tok=strsep(&keystring,":"))==NULL)
return ret;
work->createtime=atoi(tok);
if((tok=strsep(&keystring,":"))==NULL)
return ret;
work->expiretime=atoi(tok);
if((tok=strsep(&keystring,":"))==NULL)
return ret;
while(*tok)
switch(*tok++)
{
case 'r':
case 'R':
work->flags|=1;
break;
case 'd':
case 'D':
work->flags|=2;
break;
case 'e':
case 'E':
work->flags|=4;
break;
}
if(work->expiretime && work->expiretime<=make_timestamp())
work->flags|=4;
}
else if(ascii_strcasecmp("uid",record)==0 && work->desc.mode)
{
char *userid,*tok,*decoded;
if((tok=strsep(&keystring,":"))==NULL)
return ret;
if(strlen(tok)==0)
return ret;
userid=tok;
/* By definition, de-%-encoding is always smaller than the
original string so we can decode in place. */
i=0;
while(*tok)
if(tok[0]=='%' && tok[1] && tok[2])
{
if((userid[i]=hextobyte(&tok[1]))==-1)
userid[i]='?';
i++;
tok+=3;
}
else
userid[i++]=*tok++;
/* We don't care about the other info provided in the uid: line
since no keyserver supports marking userids with timestamps
or revoked/expired/disabled yet. */
/* No need to check for control characters, as utf8_to_native
does this for us. */
decoded=utf8_to_native(userid,i,0);
if(strlen(decoded)>opt.screen_columns-10)
decoded[opt.screen_columns-10]='\0';
iobuf_writestr(work->uidbuf,decoded);
m_free(decoded);
iobuf_writestr(work->uidbuf,"\n\t");
work->lines++;
}
/* Ignore any records other than "pri" and "uid" for easy future
growth. */
return ret;
}
/* TODO: do this as a list sent to keyserver_work rather than calling
it once for each key to get the correct counts after the import
(cosmetics, really) and to better take advantage of the keyservers
that can do multiple fetches in one go (LDAP). */
static int
show_prompt(KEYDB_SEARCH_DESC *desc,int numdesc,int count,const char *search)
{
char *answer;
if(count && opt.command_fd==-1)
{
static int from=1;
tty_printf("Keys %d-%d of %d for \"%s\". ",from,numdesc,count,search);
from=numdesc+1;
}
answer=cpr_get_no_help("keysearch.prompt",
_("Enter number(s), N)ext, or Q)uit > "));
/* control-d */
if(answer[0]=='\x04')
{
printf("Q\n");
answer[0]='q';
}
if(answer[0]=='q' || answer[0]=='Q')
{
m_free(answer);
return 1;
}
else if(atoi(answer)>=1 && atoi(answer)<=numdesc)
{
char *split=answer,*num;
while((num=strsep(&split," ,"))!=NULL)
if(atoi(num)>=1 && atoi(num)<=numdesc)
keyserver_work(GET,NULL,&desc[atoi(num)-1],1,opt.keyserver);
m_free(answer);
return 1;
}
return 0;
}
/* Count and searchstr are just for cosmetics. If the count is too
small, it will grow safely. If negative it disables the "Key x-y
of z" messages. */
static void
keyserver_search_prompt(IOBUF buffer,const char *searchstr)
{
int i=0,validcount=0,started=0,header=0,count=1,numlines=0;
unsigned int maxlen,buflen;
KEYDB_SEARCH_DESC *desc;
byte *line=NULL;
desc=m_alloc(count*sizeof(KEYDB_SEARCH_DESC));
for(;;)
{
struct keyrec *keyrec;
int rl;
maxlen=1024;
rl=iobuf_read_line(buffer,&line,&buflen,&maxlen);
if(opt.with_colons)
{
if(!header && ascii_strncasecmp("SEARCH ",line,7)==0
&& ascii_strncasecmp(" BEGIN",&line[strlen(line)-7],6)==0)
{
header=1;
continue;
}
else if(ascii_strncasecmp("SEARCH ",line,7)==0
&& ascii_strncasecmp(" END",&line[strlen(line)-5],4)==0)
continue;
printf("%s",line);
}
/* Look for an info: line. The only current info: values
defined are the version and key count. */
if(!started && rl>0 && ascii_strncasecmp("info:",line,5)==0)
{
char *tok,*str=&line[5];
if((tok=strsep(&str,":"))!=NULL)
{
int version;
if(sscanf(tok,"%d",&version)!=1)
version=1;
if(version!=1)
{
log_error(_("invalid keyserver protocol "
"(us %d!=handler %d)\n"),1,version);
break;
}
}
if((tok=strsep(&str,":"))!=NULL && sscanf(tok,"%d",&count)==1)
{
if(count==0)
goto notfound;
else if(count<0)
count=10;
else
validcount=1;
desc=m_realloc(desc,count*sizeof(KEYDB_SEARCH_DESC));
}
started=1;
continue;
}
if(rl==0)
{
keyrec=parse_keyrec(NULL);
if(keyrec==NULL)
{
if(i==0)
{
count=0;
break;
}
if(i!=count)
validcount=0;
for(;;)
{
if(show_prompt(desc,i,validcount?count:0,searchstr))
break;
validcount=0;
}
break;
}
}
else
keyrec=parse_keyrec(line);
if(i==count)
{
/* keyserver helper sent more keys than they claimed in the
info: line. */
count+=10;
desc=m_realloc(desc,count*sizeof(KEYDB_SEARCH_DESC));
validcount=0;
}
if(keyrec)
{
desc[i]=keyrec->desc;
if(!opt.with_colons)
{
/* screen_lines - 1 for the prompt. */
if(numlines+keyrec->lines>opt.screen_lines-1)
{
if(show_prompt(desc,i,validcount?count:0,searchstr))
break;
else
numlines=0;
}
print_keyrec(i+1,keyrec);
}
numlines+=keyrec->lines;
iobuf_close(keyrec->uidbuf);
m_free(keyrec);
started=1;
i++;
}
}
m_free(desc);
m_free(line);
notfound:
if(count==0)
{
if(searchstr)
log_info(_("key \"%s\" not found on keyserver\n"),searchstr);
else
log_info(_("key not found on keyserver\n"));
return;
}
}
#define KEYSERVER_ARGS_KEEP " -o \"%O\" \"%I\""
#define KEYSERVER_ARGS_NOKEEP " -o \"%o\" \"%i\""
static int
keyserver_spawn(int action,STRLIST list,KEYDB_SEARCH_DESC *desc,
int count,int *prog,struct keyserver_spec *keyserver)
{
int ret=0,i,gotversion=0,outofband=0;
STRLIST temp;
unsigned int maxlen,buflen;
char *command=NULL,*searchstr=NULL;
byte *line=NULL;
struct parse_options *kopts;
struct exec_info *spawn;
assert(keyserver);
#ifdef EXEC_TEMPFILE_ONLY
opt.keyserver_options.use_temp_files=1;
#endif
/* Push the libexecdir into path. If DISABLE_KEYSERVER_PATH is set,
use the 0 arg to replace the path. */
#ifdef DISABLE_KEYSERVER_PATH
set_exec_path(GNUPG_LIBEXECDIR,0);
#else
set_exec_path(GNUPG_LIBEXECDIR,opt.exec_path_set);
#endif
/* Build the filename for the helper to execute */
command=m_alloc(strlen("gpgkeys_")+strlen(keyserver->scheme)+1);
strcpy(command,"gpgkeys_");
strcat(command,keyserver->scheme);
if(opt.keyserver_options.options&KEYSERVER_USE_TEMP_FILES)
{
if(opt.keyserver_options.options&KEYSERVER_KEEP_TEMP_FILES)
{
command=m_realloc(command,strlen(command)+
strlen(KEYSERVER_ARGS_KEEP)+1);
strcat(command,KEYSERVER_ARGS_KEEP);
}
else
{
command=m_realloc(command,strlen(command)+
strlen(KEYSERVER_ARGS_NOKEEP)+1);
strcat(command,KEYSERVER_ARGS_NOKEEP);
}
ret=exec_write(&spawn,NULL,command,NULL,0,0);
}
else
ret=exec_write(&spawn,command,NULL,NULL,0,0);
if(ret)
return ret;
fprintf(spawn->tochild,"# This is a gpg keyserver communications file\n");
fprintf(spawn->tochild,"VERSION %d\n",KEYSERVER_PROTO_VERSION);
fprintf(spawn->tochild,"PROGRAM %s\n",VERSION);
fprintf(spawn->tochild,"SCHEME %s\n",keyserver->scheme);
if(keyserver->opaque)
fprintf(spawn->tochild,"OPAQUE %s\n",keyserver->opaque);
else
{
if(keyserver->host)
fprintf(spawn->tochild,"HOST %s\n",keyserver->host);
if(keyserver->port)
fprintf(spawn->tochild,"PORT %s\n",keyserver->port);
}
/* Write options */
for(i=0,kopts=keyserver_opts;kopts[i].name;i++)
if(opt.keyserver_options.options & kopts[i].bit & REMOTE_TELL)
fprintf(spawn->tochild,"OPTION %s\n",kopts[i].name);
for(i=0;i<opt.keyserver_options.verbose;i++)
fprintf(spawn->tochild,"OPTION verbose\n");
for(temp=opt.keyserver_options.other;temp;temp=temp->next)
fprintf(spawn->tochild,"OPTION %s\n",temp->d);
switch(action)
{
case GET:
{
fprintf(spawn->tochild,"COMMAND GET\n\n");
/* Which keys do we want? */
for(i=0;i<count;i++)
{
if(desc[i].mode==KEYDB_SEARCH_MODE_FPR20)
{
int f;
fprintf(spawn->tochild,"0x");
for(f=0;f<MAX_FINGERPRINT_LEN;f++)
fprintf(spawn->tochild,"%02X",(byte)desc[i].u.fpr[f]);
fprintf(spawn->tochild,"\n");
}
else if(desc[i].mode==KEYDB_SEARCH_MODE_FPR16)
{
int f;
fprintf(spawn->tochild,"0x");
for(f=0;f<16;f++)
fprintf(spawn->tochild,"%02X",(byte)desc[i].u.fpr[f]);
fprintf(spawn->tochild,"\n");
}
else if(desc[i].mode==KEYDB_SEARCH_MODE_LONG_KID)
fprintf(spawn->tochild,"0x%08lX%08lX\n",
(ulong)desc[i].u.kid[0],
(ulong)desc[i].u.kid[1]);
else
fprintf(spawn->tochild,"0x%08lX\n",
(ulong)desc[i].u.kid[1]);
}
fprintf(spawn->tochild,"\n");
break;
}
case SEND:
{
STRLIST key;
/* Note the extra \n here to send an empty keylist block */
fprintf(spawn->tochild,"COMMAND SEND\n\n\n");
for(key=list;key!=NULL;key=key->next)
{
armor_filter_context_t afx;
IOBUF buffer=iobuf_temp();
KBNODE block;
temp=NULL;
add_to_strlist(&temp,key->d);
memset(&afx,0,sizeof(afx));
afx.what=1;
iobuf_push_filter(buffer,armor_filter,&afx);
/* TODO: Remove Comment: lines from keys exported this
way? */
if(export_pubkeys_stream(buffer,temp,&block,
opt.keyserver_options.export_options)==-1)
iobuf_close(buffer);
else
{
KBNODE node;
iobuf_flush_temp(buffer);
merge_keys_and_selfsig(block);
fprintf(spawn->tochild,"INFO %08lX%08lX BEGIN\n",
(ulong)block->pkt->pkt.public_key->keyid[0],
(ulong)block->pkt->pkt.public_key->keyid[1]);
for(node=block;node;node=node->next)
{
switch(node->pkt->pkttype)
{
default:
continue;
case PKT_PUBLIC_KEY:
case PKT_PUBLIC_SUBKEY:
{
PKT_public_key *pk=node->pkt->pkt.public_key;
keyid_from_pk(pk,NULL);
fprintf(spawn->tochild,"%sb:%08lX%08lX:%u:%u:%u:%u:",
node->pkt->pkttype==PKT_PUBLIC_KEY?"pu":"su",
(ulong)pk->keyid[0],(ulong)pk->keyid[1],
pk->pubkey_algo,
nbits_from_pk(pk),
pk->timestamp,
pk->expiredate);
if(pk->is_revoked)
fprintf(spawn->tochild,"r");
if(pk->has_expired)
fprintf(spawn->tochild,"e");
fprintf(spawn->tochild,"\n");
}
break;
case PKT_USER_ID:
{
PKT_user_id *uid=node->pkt->pkt.user_id;
int r;
if(uid->attrib_data)
continue;
fprintf(spawn->tochild,"uid:");
/* Quote ':', '%', and any 8-bit
characters */
for(r=0;r<uid->len;r++)
{
if(uid->name[r]==':' || uid->name[r]=='%'
|| uid->name[r]&0x80)
fprintf(spawn->tochild,"%%%02X",
(byte)uid->name[r]);
else
fprintf(spawn->tochild,"%c",uid->name[r]);
}
fprintf(spawn->tochild,":%u:%u:",
uid->created,uid->expiredate);
if(uid->is_revoked)
fprintf(spawn->tochild,"r");
if(uid->is_expired)
fprintf(spawn->tochild,"e");
fprintf(spawn->tochild,"\n");
}
break;
/* This bit is really for the benefit of
people who store their keys in LDAP
servers. It makes it easy to do queries
for things like "all keys signed by
Isabella". */
case PKT_SIGNATURE:
{
PKT_signature *sig=node->pkt->pkt.signature;
if(!IS_UID_SIG(sig))
continue;
fprintf(spawn->tochild,"sig:%08lX%08lX:%X:%u:%u\n",
(ulong)sig->keyid[0],(ulong)sig->keyid[1],
sig->sig_class,sig->timestamp,
sig->expiredate);
}
break;
}
}
fprintf(spawn->tochild,"INFO %08lX%08lX END\n",
(ulong)block->pkt->pkt.public_key->keyid[0],
(ulong)block->pkt->pkt.public_key->keyid[1]);
fprintf(spawn->tochild,"KEY %s BEGIN\n",key->d);
fwrite(iobuf_get_temp_buffer(buffer),
iobuf_get_temp_length(buffer),1,spawn->tochild);
fprintf(spawn->tochild,"KEY %s END\n",key->d);
iobuf_close(buffer);
release_kbnode(block);
}
free_strlist(temp);
}
break;
}
case SEARCH:
{
STRLIST key;
fprintf(spawn->tochild,"COMMAND SEARCH\n\n");
/* Which keys do we want? Remember that the gpgkeys_ program
is going to lump these together into a search string. */
for(key=list;key!=NULL;key=key->next)
{
fprintf(spawn->tochild,"%s\n",key->d);
if(key!=list)
{
searchstr=m_realloc(searchstr,
strlen(searchstr)+strlen(key->d)+2);
strcat(searchstr," ");
}
else
{
searchstr=m_alloc(strlen(key->d)+1);
searchstr[0]='\0';
}
strcat(searchstr,key->d);
}
fprintf(spawn->tochild,"\n");
break;
}
default:
log_fatal(_("no keyserver action!\n"));
break;
}
/* Done sending, so start reading. */
ret=exec_read(spawn);
if(ret)
goto fail;
/* Now handle the response */
for(;;)
{
int plen;
char *ptr;
maxlen=1024;
if(iobuf_read_line(spawn->fromchild,&line,&buflen,&maxlen)==0)
{
ret=G10ERR_READ_FILE;
goto fail; /* i.e. EOF */
}
ptr=line;
/* remove trailing whitespace */
plen=strlen(ptr);
while(plen>0 && ascii_isspace(ptr[plen-1]))
plen--;
plen[ptr]='\0';
if(*ptr=='\0')
break;
if(ascii_strncasecmp(ptr,"VERSION ",8)==0)
{
gotversion=1;
if(atoi(&ptr[8])!=KEYSERVER_PROTO_VERSION)
{
log_error(_("invalid keyserver protocol (us %d!=handler %d)\n"),
KEYSERVER_PROTO_VERSION,atoi(&ptr[8]));
goto fail;
}
}
else if(ascii_strncasecmp(ptr,"PROGRAM ",8)==0)
{
if(ascii_strncasecmp(&ptr[8],VERSION,strlen(VERSION))!=0)
log_info(_("WARNING: keyserver handler from a different "
"version of GnuPG (%s)\n"),&ptr[8]);
}
else if(ascii_strncasecmp(ptr,"OPTION OUTOFBAND",16)==0)
outofband=1; /* Currently the only OPTION */
}
if(!gotversion)
{
log_error(_("keyserver did not send VERSION\n"));
goto fail;
}
if(!outofband)
switch(action)
{
case GET:
{
void *stats_handle;
stats_handle=import_new_stats_handle();
/* Slurp up all the key data. In the future, it might be
nice to look for KEY foo OUTOFBAND and FAILED indicators.
It's harmless to ignore them, but ignoring them does make
gpg complain about "no valid OpenPGP data found". One
way to do this could be to continue parsing this
line-by-line and make a temp iobuf for each key. */
import_keys_stream(spawn->fromchild,stats_handle,
opt.keyserver_options.import_options);
import_print_stats(stats_handle);
import_release_stats_handle(stats_handle);
break;
}
/* Nothing to do here */
case SEND:
break;
case SEARCH:
{
keyserver_search_prompt(spawn->fromchild,searchstr);
break;
}
default:
log_fatal(_("no keyserver action!\n"));
break;
}
fail:
m_free(line);
*prog=exec_finish(spawn);
return ret;
}
static int
keyserver_work(int action,STRLIST list,KEYDB_SEARCH_DESC *desc,
int count,struct keyserver_spec *keyserver)
{
int rc=0,ret=0;
if(!opt.keyserver)
{
log_error(_("no keyserver known (use option --keyserver)\n"));
return G10ERR_BAD_URI;
}
#ifdef DISABLE_KEYSERVER_HELPERS
log_error(_("external keyserver calls are not supported in this build\n"));
return G10ERR_KEYSERVER;
#else
/* Spawn a handler */
rc=keyserver_spawn(action,list,desc,count,&ret,keyserver);
if(ret)
{
switch(ret)
{
case KEYSERVER_SCHEME_NOT_FOUND:
log_error(_("no handler for keyserver scheme \"%s\"\n"),
opt.keyserver->scheme);
break;
case KEYSERVER_NOT_SUPPORTED:
log_error(_("action \"%s\" not supported with keyserver "
"scheme \"%s\"\n"),
action==GET?"get":action==SEND?"send":
action==SEARCH?"search":"unknown",
opt.keyserver->scheme);
break;
case KEYSERVER_VERSION_ERROR:
log_error(_("gpgkeys_%s does not support handler version %d\n"),
opt.keyserver->scheme,KEYSERVER_PROTO_VERSION);
break;
case KEYSERVER_INTERNAL_ERROR:
default:
log_error(_("keyserver internal error\n"));
break;
}
return G10ERR_KEYSERVER;
}
if(rc)
{
log_error(_("keyserver communications error: %s\n"),g10_errstr(rc));
return rc;
}
return 0;
#endif /* ! DISABLE_KEYSERVER_HELPERS*/
}
int
keyserver_export(STRLIST users)
{
STRLIST sl=NULL;
KEYDB_SEARCH_DESC desc;
int rc=0;
/* Weed out descriptors that we don't support sending */
for(;users;users=users->next)
{
classify_user_id (users->d, &desc);
if(desc.mode!=KEYDB_SEARCH_MODE_SHORT_KID &&
desc.mode!=KEYDB_SEARCH_MODE_LONG_KID &&
desc.mode!=KEYDB_SEARCH_MODE_FPR16 &&
desc.mode!=KEYDB_SEARCH_MODE_FPR20)
{
log_error(_("\"%s\" not a key ID: skipping\n"),users->d);
continue;
}
else
append_to_strlist(&sl,users->d);
}
if(sl)
{
rc=keyserver_work(SEND,sl,NULL,0,opt.keyserver);
free_strlist(sl);
}
return rc;
}
int
keyserver_import(STRLIST users)
{
KEYDB_SEARCH_DESC *desc;
int num=100,count=0;
int rc=0;
/* Build a list of key ids */
desc=m_alloc(sizeof(KEYDB_SEARCH_DESC)*num);
for(;users;users=users->next)
{
classify_user_id (users->d, &desc[count]);
if(desc[count].mode!=KEYDB_SEARCH_MODE_SHORT_KID &&
desc[count].mode!=KEYDB_SEARCH_MODE_LONG_KID &&
desc[count].mode!=KEYDB_SEARCH_MODE_FPR16 &&
desc[count].mode!=KEYDB_SEARCH_MODE_FPR20)
{
log_error(_("\"%s\" not a key ID: skipping\n"),users->d);
continue;
}
count++;
if(count==num)
{
num+=100;
desc=m_realloc(desc,sizeof(KEYDB_SEARCH_DESC)*num);
}
}
if(count>0)
rc=keyserver_work(GET,NULL,desc,count,opt.keyserver);
m_free(desc);
return rc;
}
int
keyserver_import_fprint(const byte *fprint,size_t fprint_len)
{
KEYDB_SEARCH_DESC desc;
memset(&desc,0,sizeof(desc));
if(fprint_len==16)
desc.mode=KEYDB_SEARCH_MODE_FPR16;
else if(fprint_len==20)
desc.mode=KEYDB_SEARCH_MODE_FPR20;
else
return -1;
memcpy(desc.u.fpr,fprint,fprint_len);
return keyserver_work(GET,NULL,&desc,1,opt.keyserver);
}
int
keyserver_import_keyid(u32 *keyid)
{
KEYDB_SEARCH_DESC desc;
memset(&desc,0,sizeof(desc));
desc.mode=KEYDB_SEARCH_MODE_LONG_KID;
desc.u.kid[0]=keyid[0];
desc.u.kid[1]=keyid[1];
return keyserver_work(GET,NULL,&desc,1,opt.keyserver);
}
static void
calculate_keyid_fpr(PKT_public_key *pk,KEYDB_SEARCH_DESC *desc)
{
if(pk->version<4)
{
desc->mode=KEYDB_SEARCH_MODE_LONG_KID;
keyid_from_pk(pk,desc->u.kid);
}
else
{
size_t dummy;
desc->mode=KEYDB_SEARCH_MODE_FPR20;
fingerprint_from_pk(pk,desc->u.fpr,&dummy);
}
}
static int
keyidlist(STRLIST users,KEYDB_SEARCH_DESC **klist,int *count,int fakev3)
{
int rc=0,num=100;
KBNODE keyblock=NULL,node;
GETKEY_CTX ctx;
*count=0;
rc=get_pubkey_bynames(&ctx,NULL,users,&keyblock);
if(rc)
{
log_error("error reading key: %s\n", g10_errstr(rc) );
get_pubkey_end( ctx );
return rc;
}
*klist=m_alloc(sizeof(KEYDB_SEARCH_DESC)*num);
do
{
if((node=find_kbnode(keyblock,PKT_PUBLIC_KEY)))
{
PKT_public_key *pk=node->pkt->pkt.public_key;
/* Check the user ID for a preferred keyserver subpacket. */
if(opt.keyserver_options.options&KEYSERVER_HONOR_KEYSERVER_URL)
{
PKT_user_id *uid=NULL;
PKT_signature *sig=NULL;
for(node=node->next;node;node=node->next)
{
if(node->pkt->pkttype==PKT_USER_ID
&& node->pkt->pkt.user_id->is_primary)
uid=node->pkt->pkt.user_id;
else if(node->pkt->pkttype==PKT_SIGNATURE
&& node->pkt->pkt.signature->
flags.chosen_selfsig && uid)
{
sig=node->pkt->pkt.signature;
break;
}
}
if(uid && sig)
{
const byte *p;
size_t plen;
p=parse_sig_subpkt(sig->hashed,SIGSUBPKT_PREF_KS,&plen);
if(p && plen)
{
struct keyserver_spec *keyserver;
byte *dupe=m_alloc(plen+1);
memcpy(dupe,p,plen);
dupe[plen]='\0';
/* Make up a keyserver structure and do an
import for this key. */
keyserver=parse_keyserver_uri(dupe,NULL,0);
m_free(dupe);
if(keyserver)
{
KEYDB_SEARCH_DESC desc;
calculate_keyid_fpr(pk,&desc);
rc=keyserver_work(GET,NULL,&desc,1,keyserver);
if(rc)
log_info(_("WARNING: unable to refresh key %s"
" via %s: %s\n"),
keystr_from_pk(pk),keyserver->uri,
g10_errstr(rc));
free_keyserver_spec(keyserver);
continue;
}
else
log_info(_("WARNING: unable to refresh key %s"
" via %s: %s\n"),
keystr_from_pk(pk),keyserver->uri,
g10_errstr(G10ERR_BAD_URI));
}
}
}
/* This is to work around a bug in some keyservers (pksd and
OKS) that calculate v4 RSA keyids as if they were v3 RSA.
The answer is to refresh both the correct v4 keyid
(e.g. 99242560) and the fake v3 keyid (e.g. 68FDDBC7).
This only happens for key refresh using the HKP scheme
and if the refresh-add-fake-v3-keyids keyserver option is
set. */
if(fakev3 && is_RSA(pk->pubkey_algo) && pk->version>=4)
{
(*klist)[*count].mode=KEYDB_SEARCH_MODE_LONG_KID;
mpi_get_keyid(pk->pkey[0],(*klist)[*count].u.kid);
(*count)++;
if(*count==num)
{
num+=100;
*klist=m_realloc(*klist,sizeof(KEYDB_SEARCH_DESC)*num);
}
}
/* v4 keys get full fingerprints. v3 keys get long keyids.
This is because it's easy to calculate any sort of key id
from a v4 fingerprint, but not a v3 fingerprint. */
if(pk->version<4)
{
(*klist)[*count].mode=KEYDB_SEARCH_MODE_LONG_KID;
keyid_from_pk(pk,(*klist)[*count].u.kid);
}
else
{
size_t dummy;
(*klist)[*count].mode=KEYDB_SEARCH_MODE_FPR20;
fingerprint_from_pk(pk,(*klist)[*count].u.fpr,&dummy);
}
(*count)++;
if(*count==num)
{
num+=100;
*klist=m_realloc(*klist,sizeof(KEYDB_SEARCH_DESC)*num);
}
}
release_kbnode(keyblock);
}
while(!get_pubkey_next(ctx,NULL,&keyblock));
return 0;
}
/* Note this is different than the original HKP refresh. It allows
usernames to refresh only part of the keyring. */
int
keyserver_refresh(STRLIST users)
{
int rc,count,fakev3=0;
KEYDB_SEARCH_DESC *desc;
/* We switch merge_only on during a refresh, as 'refresh' should
never import new keys, even if their keyids match. Is it worth
preserving the old merge_only value here? */
opt.import_options|=IMPORT_MERGE_ONLY;
/* If refresh_add_fake_v3_keyids is on and it's a HKP or MAILTO
scheme, then enable fake v3 keyid generation. */
if((opt.keyserver_options.options&KEYSERVER_ADD_FAKE_V3) && opt.keyserver
&& (ascii_strcasecmp(opt.keyserver->scheme,"hkp")==0 ||
ascii_strcasecmp(opt.keyserver->scheme,"mailto")==0))
fakev3=1;
rc=keyidlist(users,&desc,&count,fakev3);
if(rc)
return rc;
if(count>0)
{
if(opt.keyserver)
{
if(count==1)
log_info(_("refreshing 1 key from %s\n"),opt.keyserver->uri);
else
log_info(_("refreshing %d keys from %s\n"),
count,opt.keyserver->uri);
}
rc=keyserver_work(GET,NULL,desc,count,opt.keyserver);
}
m_free(desc);
return rc;
}
int
keyserver_search(STRLIST tokens)
{
if(tokens)
return keyserver_work(SEARCH,tokens,NULL,0,opt.keyserver);
else
return 0;
}
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