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ks-proto.c
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/* ks-proto.c keyserver protocol handling
* Copyright (C) 1998 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
*/
/****************
* The extended HKP protocol:
*
* GET /pks/lookup[/<gnupg_user_id>][?[op=<cmd>][&armor=0][&search=<keywords>]]
*
* Default is: "armor=1", "op=get". "search" is only allowed if gnupg_user_id
* is not present. GET maybe replaced by HEAD in which case only some status
* information is returned.
*
* Hmmm, I don't like it, the better solution is to use:
*
* /pks/gnupg/get for binary lookups
* /pks/gnupg/upd to update a key
* /pks/gnupg/ins to insert a new key
*
* Optional a version string can be inserted as in:
*
* /pks/gnupg/v1.0/get
*
* Returned HTTP options:
* X-Key-Hash: <rmd160 hash value of the keyblock>
* X-Key-MTime: <last modification time>
* X-Key-LID: <local_key_id_used_for_update_etc>
* [fixme: is X-.... allowed?]
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "util.h"
#include "ks-proto.h"
static int
do_read( int fd, char *buffer, size_t bufsize, int *ret_nread )
{
int n;
fd_set rfds;
struct timeval tv;
int rc;
*ret_nread = 0;
do {
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
tv.tv_sec = 1;
tv.tv_usec = 0;
if( !(rc=select(fd+1, &rfds, NULL, NULL, &tv)) )
return 0; /* timeout */
if( rc == -1 ) {
log_error("select() error: %s\n", strerror(errno));
return -1;
}
do {
n = read(fd, buffer, bufsize );
if( n >= 0 && n > bufsize )
log_bug("bogus read from fd %d (n=%d)\n", fd, n );
} while( n == -1 && errno == EINTR );
if( n == -1 ) {
log_error("read error on fd %d: %s\n", fd, strerror(errno) );
return -1;
}
} while( !n );
*ret_nread = n;
return 0;
}
int
ks_get_request( int fd, KS_TRANS *req )
{
char *p, *p2, buf[500];
int nread, n;
int state = 0;
req->err = 0;
req->data = NULL;
while( !do_read( fd, buf, DIM(buf)-1, &nread ) {
p = buf;
if( !state ) {
/* replace the trailing LF with a 0 */
for(p2=p,n=0; n < nread && *p2 != '\n'; p2++ )
;
if( *p2 != '\n' ) {
req->err = KS_ERR_REQ_TOO_LONG;
break;
}
*p2++ = 0;
n++;
/* now look at the request. Note that the isspace() will work
* because there is still a CR before the 0 */
if( (p[0] == 'G' || p[0] == 'g')
&& (p[1] == 'E' || p[1] == 'e')
&& (p[2] == 'T' || p[2] == 't') && isspace( p[3] ) ) {
req->cmd = KS_REQ_GET;
p += 4;
}
else if( (p[0] == 'H' || p[0] == 'h')
&& (p[1] == 'E' || p[1] == 'e')
&& (p[2] == 'A' || p[2] == 'a')
&& (p[3] == 'D' || p[3] == 'd') && isspace( p[4] ) ) {
req->cmd = KS_REQ_HEAD;
p += 5;
}
else if( (p[0] == 'H' || p[0] == 'h')
&& (p[1] == 'E' || p[1] == 'e')
&& (p[2] == 'L' || p[2] == 'l')
&& (p[3] == 'P' || p[3] == 'p') && isspace( p[4] ) ) {
req->cmd = KS_REQ_HELP;
p += 5;
}
else
req->cmd = KS_REQ_UNKNOWN;
/* skip spaces, store args and remaining data */
while( *p == ' ' || *p == '\t' )
p++;
/* fixme: remove trailing blanks from args */
req->args = p;
p = p2; /* p now points to the remaining n bytes in the buffer */
state = 1;
}
if( state == 1 ) {
/* read the option lines */
}
}
}

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text/x-c
Expires
Thu, Dec 11, 8:02 AM (7 h, 45 m)
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