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git://git.gnupg.org/gnupg.git
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40ca0022a7
-- This is required by newer mingw toolchain versions which demand that winsock2.h is included before windows.h. Now, due to the use of socket definitions in pth.h we need to include winsock2.h also in pth.h, now pth.h is often included after an include of windows.h and thus the compiler spits out a warning. To avoid that we include winsock2.h at all places the compiler complains about.
504 lines
11 KiB
C
504 lines
11 KiB
C
/* gpgkeys_finger.c - fetch a key via finger
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* Copyright (C) 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 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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#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_W32_SYSTEM
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# ifdef HAVE_WINSOCK2_H
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# include <winsock2.h>
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# endif
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# include <windows.h>
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#else
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#endif
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#define INCLUDED_BY_MAIN_MODULE 1
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#include "util.h"
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#include "keyserver.h"
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#include "ksutil.h"
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#include "iobuf.h"
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#ifdef HAVE_W32_SYSTEM
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#define sock_close(a) closesocket(a)
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#else
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#define sock_close(a) close(a)
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#endif
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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 struct ks_options *opt;
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/* Connect to SERVER at PORT and return a file descriptor or -1 on
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error. */
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static int
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connect_server (const char *server, unsigned short port)
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{
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int sock = -1;
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#ifdef HAVE_W32_SYSTEM
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struct hostent *hp;
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struct sockaddr_in addr;
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unsigned long l;
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w32_init_sockets ();
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memset (&addr, 0, sizeof addr);
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addr.sin_family = AF_INET;
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addr.sin_port = htons (port);
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/* Win32 gethostbyname doesn't handle IP addresses internally, so we
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try inet_addr first on that platform only. */
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if ((l = inet_addr (server)) != INADDR_NONE)
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memcpy (&addr.sin_addr, &l, sizeof l);
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else if ((hp = gethostbyname (server)))
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{
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if (hp->h_addrtype != AF_INET)
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{
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fprintf (console, "gpgkeys: unknown address family for `%s'\n",
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server);
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return -1;
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}
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if (hp->h_length != 4)
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{
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fprintf (console, "gpgkeys: illegal address length for `%s'\n",
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server);
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return -1;
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}
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memcpy (&addr.sin_addr, hp->h_addr, hp->h_length);
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}
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else
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{
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fprintf (console, "gpgkeys: host `%s' not found: ec=%d\n",
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server, (int)WSAGetLastError ());
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return -1;
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}
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sock = socket (AF_INET, SOCK_STREAM, 0);
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if (sock == INVALID_SOCKET)
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{
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fprintf (console, "gpgkeys: error creating socket: ec=%d\n",
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(int)WSAGetLastError ());
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return -1;
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}
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if (connect (sock, (struct sockaddr *)&addr, sizeof addr))
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{
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fprintf (console, "gpgkeys: error connecting `%s': ec=%d\n",
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server, (int)WSAGetLastError ());
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sock_close (sock);
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return -1;
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}
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#else
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struct sockaddr_in addr;
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struct hostent *host;
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addr.sin_family = AF_INET;
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addr.sin_port = htons (port);
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host = gethostbyname ((char*)server);
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if (!host)
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{
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fprintf (console, "gpgkeys: host `%s' not found: %s\n",
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server, strerror (errno));
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return -1;
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}
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addr.sin_addr = *(struct in_addr*)host->h_addr;
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sock = socket (AF_INET, SOCK_STREAM, 0);
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if (sock == -1)
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{
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fprintf (console, "gpgkeys: error creating socket: %s\n",
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strerror (errno));
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return -1;
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}
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if (connect (sock, (struct sockaddr *)&addr, sizeof addr) == -1)
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{
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fprintf (console, "gpgkeys: error connecting `%s': %s\n",
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server, strerror (errno));
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close (sock);
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return -1;
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}
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#endif
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return sock;
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}
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static int
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write_server (int sock, const char *data, size_t length)
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{
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int nleft;
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nleft = length;
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while (nleft > 0)
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{
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int nwritten;
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#ifdef HAVE_W32_SYSTEM
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nwritten = send (sock, data, nleft, 0);
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if ( nwritten == SOCKET_ERROR )
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{
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fprintf (console, "gpgkeys: write failed: ec=%d\n",
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(int)WSAGetLastError ());
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return -1;
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}
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#else
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nwritten = write (sock, data, nleft);
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if (nwritten == -1)
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{
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if (errno == EINTR)
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continue;
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if (errno == EAGAIN)
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{
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = 50000;
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select(0, NULL, NULL, NULL, &tv);
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continue;
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}
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fprintf (console, "gpgkeys: write failed: %s\n", strerror(errno));
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return -1;
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}
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#endif
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nleft -=nwritten;
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data += nwritten;
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}
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return 0;
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}
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/* Send the finger REQUEST to the server. Returns 0 and a file descriptor
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in R_SOCK if the request was sucessful. */
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static int
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send_request (const char *request, int *r_sock)
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{
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char *server;
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char *name;
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int sock;
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*r_sock = -1;
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name = strdup (request);
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if (!name)
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{
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fprintf(console,"gpgkeys: out of memory\n");
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return KEYSERVER_NO_MEMORY;
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}
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server = strchr (name, '@');
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if (!server)
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{
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fprintf (console, "gpgkeys: no name included in request\n");
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free (name);
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return KEYSERVER_GENERAL_ERROR;
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}
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*server++ = 0;
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sock = connect_server (server, 79);
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if (sock == -1)
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{
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free (name);
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return KEYSERVER_UNREACHABLE;
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}
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if (write_server (sock, name, strlen (name))
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|| write_server (sock, "\r\n", 2))
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{
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free (name);
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sock_close (sock);
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return KEYSERVER_GENERAL_ERROR;
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}
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free (name);
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*r_sock = sock;
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return 0;
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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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int rc;
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int sock;
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iobuf_t fp_read;
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unsigned int maxlen, buflen, gotit=0;
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byte *line = NULL;
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if (strncmp (getkey,"0x",2)==0)
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getkey+=2;
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/* Frankly we don't know what keys the server will return; we
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indicated the requested key anyway. */
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fprintf(output,"KEY 0x%s BEGIN\n",getkey);
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rc=send_request(opt->opaque,&sock);
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if(rc)
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{
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fprintf(output,"KEY 0x%s FAILED %d\n",getkey, rc);
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sock_close (sock);
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return KEYSERVER_OK;
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}
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/* Hmmm, we use iobuf here only to cope with Windows socket
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peculiarities (we can't used fdopen). */
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fp_read = iobuf_sockopen (sock , "r");
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if (!fp_read)
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{
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fprintf(output,"KEY 0x%s FAILED %d\n",getkey, KEYSERVER_INTERNAL_ERROR);
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sock_close (sock);
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return KEYSERVER_OK;
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}
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while ( iobuf_read_line ( fp_read, &line, &buflen, &maxlen))
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{
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maxlen=1024;
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if(gotit)
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{
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print_nocr(output, (const char*)line);
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if (!strncmp((char*)line,END,strlen(END)))
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break;
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}
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else if(!strncmp((char*)line,BEGIN,strlen(BEGIN)))
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{
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print_nocr(output, (const char*)line);
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gotit=1;
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}
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}
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if(gotit)
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fprintf (output,"KEY 0x%s END\n", getkey);
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else
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{
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fprintf(console,"gpgkeys: no key data found for finger:%s\n",
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opt->opaque);
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fprintf(output,"KEY 0x%s FAILED %d\n",getkey,KEYSERVER_KEY_NOT_FOUND);
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}
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xfree(line);
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iobuf_close (fp_read);
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return KEYSERVER_OK;
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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;
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char line[MAX_LINE];
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char *thekey=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_finger (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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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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}
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if(opt->host)
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{
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fprintf(console,"gpgkeys: finger://relay/user syntax is not"
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" supported. Use finger:user instead.\n");
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ret=KEYSERVER_NOT_SUPPORTED;
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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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/* 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 || !opt->opaque)
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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>1)
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{
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fprintf(console,"User:\t\t%s\n",opt->opaque);
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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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return ret;
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}
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