/[winpt]/trunk/Src/wptKeyserver.cpp
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revision 2 by twoaday, Mon Jan 31 11:02:21 2005 UTC revision 340 by twoaday, Sun Nov 27 13:15:07 2011 UTC
# Line 1  Line 1 
1  /* wptKeyserver.cpp - W32 Keyserver Access  /* wptKeyserver.cpp - W32 Keyserver Access
2   *      Copyright (C) 2000-2005 Timo Schulz   *      Copyright (C) 2000-2009 Timo Schulz
3   *      Copyright (C) 2001 Marco Cunha   *      Copyright (C) 2001 Marco Cunha
4   *   *
5   * This file is part of WinPT.   * This file is part of WinPT.
6   *   *
7   * WinPT is free software; you can redistribute it and/or   * WinPT is free software; you can redistribute it and/or
8   * modify it under the terms of the GNU General Public License   * modify it under the terms of the GNU General Public License
9   * as published by the Free Software Foundation; either version 2   * as published by the Free Software Foundation; either version 2
10   * of the License, or (at your option) any later version.   * of the License, or (at your option) any later version.
11   *     *  
12   * WinPT is distributed in the hope that it will be useful,   * WinPT is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * General Public License for more details.   * General Public License for more details.
16   *   */
17   * You should have received a copy of the GNU General Public License  #ifdef HAVE_CONFIG_H
18   * along with WinPT; if not, write to the Free Software Foundation,  #include <config.h>
19   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA  #endif
20   */  
21    #include <windows.h>
22  #include <windows.h>  #include <shlobj.h>
23  #include <stdio.h>  #include <stdio.h>
24  #include <sys/stat.h>  #include <sys/stat.h>
25  #include <ctype.h>  #include <ctype.h>
26    
27  #include "wptKeyserver.h"  #include "wptGPG.h"
28  #include "wptErrors.h"  #include "wptKeyserver.h"
29  #include "wptTypes.h"  #include "wptErrors.h"
30  #include "wptNLS.h"  #include "wptTypes.h"
31  #include "wptW32API.h"  #include "wptNLS.h"
32  #include "wptVersion.h"  #include "wptW32API.h"
33  #include "wptGPG.h"  #include "wptRegistry.h"
34  #include "wptRegistry.h"  #include "wptUTF8.h"
35    #include "wptVersion.h"
36  static char base64code[] =  #include "StringBuffer.h"
37    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";  
38    
39  keyserver server[MAX_KEYSERVERS] = {0};  /* Map net_errno to a winsock error. */
40  static keyserver_proxy_ctx proxy = {0};  #define net_errno ((int)WSAGetLastError ())
41  static const char * server_list[] = {  
42      "hkp://wwwkeys.nl.pgp.net",  keyserver server[MAX_KEYSERVERS] = {0};
43      "hkp://wwwkeys.pl.pgp.net",  keyserver_proxy_s proxy = {0};
44      "hkp://wwwkeys.at.pgp.net",  static const char *server_list[] = {
45      "hkp://wwwkeys.ch.pgp.net",      "hkp://pool.sks-keyservers.net",
46      "hkp://wwwkeys.de.pgp.net",      "hkp://subkeys.pgp.net",
47      "hkp://wwwkeys.dk.pgp.net",      "http://minsky.surfnet.nl",
48      "hkp://wwwkeys.cz.pgp.net",      NULL
49      "hkp://wwwkeys.es.pgp.net",  };
50      "hkp://wwwkeys.eu.pgp.net",  #define NUM_DEF_KEYSERVERS 3
51      "hkp://wwwkeys.uk.pgp.net",  
52      "hkp://wwwkeys.us.pgp.net",  static char  hkp_err_msg[384];  /* Holds the error message from the server */
53      "hkp://gnv.us.ks.cryptnet.net",  static int   hkp_has_err = 0;   /* != 0 indicates an error occurred. */
54      "hkp://subkeys.pgp.net",  
55      "ldap://keyserver.pgp.com",  /* Default keyserver and port. */
56      NULL  char *default_keyserver = NULL;
57  };  WORD default_keyserver_port = 0;
58  static char hkp_errmsg[1024];  
59  static int hkp_err = 0;  /* Default socket timeout (secs). */
60  static u32 conf_timestamp = 0;  static size_t default_socket_timeout = 6;
61  char * default_keyserver = NULL;  
62  unsigned short default_keyserver_port = 0;  
63    /* Remove %AB sequences from the input buffer @in
64       and store the raw data in @out. */
65  static void  void
66  base64_encode( const char *inputstr, char *outputstr, int maxlen )  unhexify_buffer (const char *in, char **r_out)
67  {        {
68      int index = 0, temp = 0, res = 0, i = 0, inputlen = 0, len = 0;      char temp[3], *out;
69            size_t len, pos, i=0;
70      inputlen = strlen (inputstr); /* fixme: check if len > maxlen */  
71      for (i = 0; i <inputlen; i++) {      len = strlen (in);
72          res = temp;      out = new char[len+1];
73          res = (res << 8) | (inputstr[i] & 0xFF);      if (!out)
74          switch (index++) {          BUG (0);
75          case 0: outputstr[len++] = base64code[res >> 2 & 0x3F]; res &= 0x3; break;                  memset (out, 0, len+1);
76          case 1: outputstr[len++] = base64code[res >> 4 & 0x3F]; res &= 0xF; break;                  for (pos = 0; pos < len; pos++) {
77          case 2: outputstr[len++] = base64code[res >> 6 & 0x3F];          if (in[pos] == '%' && in[pos+1] == '%')
78                  outputstr[len++] = base64code[res & 0x3F]; res = index = 0; break;              out[i++] = '%';
79          }          else if (in[pos] == '%') {
80          temp = res;              temp[0] = in[++pos];
81      }              temp[1] = in[++pos];
82                    temp[2] = 0;
83      switch( index ) {              out[i++] = (char)strtoul (temp, NULL, 16);
84      case 0: break;                  }
85      case 2: outputstr[len++] = base64code[temp << 2 & 0x3F];              else
86              outputstr[len++] = '='; break;                      out[i++] = in[pos];
87      case 1: outputstr[len++] = base64code[temp << 4 & 0x3F];          }
88              outputstr[len++] = '=';      out[i] = 0;
89              outputstr[len++] = '=';      *r_out = out;
90      }  }
91        
92      outputstr[len] = '\0';  
93  } /* base64_encode */  /* Wrapper for safe memory allocation. */
94    static char*
95    safe_alloc (DWORD n)
96  static const char *  {
97  skip_type_prefix (const char * hostname)      char *p = new char[n+1];
98  {      if (!p)
99      if (hostname && !strncmp (hostname, "http://", 7))          BUG (0);
100          hostname += 7;      memset (p, 0, n);
101      else if (hostname && !strncmp (hostname, "hkp://", 6))      return p;
102          hostname += 6;  }
103      else if (hostname && !strncmp (hostname, "finger://", 9))  
104          hostname += 9;  
105      else if (hostname && !strncmp (hostname, "ldap://", 7))  /* Basic64 encode the input @inbuf to @outbuf. */
106          hostname += 7;  static void
107      return hostname;  base64_encode (const char *inbuf, char *outbuf)
108  }  {
109        char base64code[] =
110            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
111  static int      int index = 0, temp = 0, res = 0;
112  check_hkp_response (const char *resp, int recv)      int inputlen, len = 0;
113  {      
114      int ec, len;      inputlen = strlen (inbuf);
115      char *p, * end;      for (int i = 0; i < inputlen; i++) {
116            res = temp;
117      ec = recv ? WPTERR_WINSOCK_RECVKEY : WPTERR_WINSOCK_SENDKEY;          res = (res << 8) | (inbuf[i] & 0xFF);
118      if (!strstr (resp, "HTTP/1.0 200 OK")) /* http error */          switch (index++) {
119          return ec;          case 0:
120      if (strstr (resp, "Public Key Server -- Error")              outbuf[len++] = base64code[res >> 2 & 0x3F];
121          || strstr (resp, "Public Key Server -- Error")              res &= 0x3;
122          || strstr (resp, "No matching keys in database")) {              break;
123          p = strstr (resp, "<p>");          case 1:
124          if (p && strlen (p) < sizeof (hkp_errmsg)) {              outbuf[len++] = base64code[res >> 4 & 0x3F];
125              end = strstr (p, "</p>");              res &= 0xF;
126              len = end? (end - p + 1) : strlen (p);              break;
127              strncpy (hkp_errmsg, p, len);          case 2:
128              hkp_err = 1;              outbuf[len++] = base64code[res >> 6 & 0x3F];
129          }              outbuf[len++] = base64code[res & 0x3F];
130          return ec;              res = index = 0;
131      }              break;
132      return 0;          }
133  } /* check_hkp_response */          temp = res;
134        }
135        
136  static int      if (index == 2) {      
137  sock_getline (int fd, char *buf, int buflen, int *nbytes)          outbuf[len++] = base64code[temp << 2 & 0x3F];  
138  {          outbuf[len++] = '=';
139      char ch;      }
140      int count = 0;            else if (index == 1) {
141                outbuf[len++] = base64code[temp << 4 & 0x3F];
142      if (nbytes)          outbuf[len++] = '=';
143          *nbytes = 0;          outbuf[len++] = '=';
144      *buf = 0;      }
145      while (recv (fd, &ch, 1, 0) > 0) {  
146          *buf++ = ch;      outbuf[len] = '\0';
147          count++;  }
148          if (ch == '\n' || count == (buflen - 1)) {  
149              *buf = 0;  
150              if (nbytes)  /* Check that the given buffer contains a valid keyserver URL
151                  *nbytes = count;     and return the prefix length, 0 in case of an error. */
152              return 0;  static int
153          }  check_URL (const char *buf)
154      }  {
155        if (strstr (buf, "hkp://"))
156      return -1;          return 6;
157  } /* sock_getline */      if (strstr (buf, "http://"))
158            return 7;
159        return 0;
160  static int  }
161  sock_select( int fd )  
162  {  
163      FD_SET rfd;  /* Skip the URL schema and return only the host part of it. */
164      timeval tv = {1, 0};  static const char*
165    skip_type_prefix (const char *hostname)
166      FD_ZERO( &rfd );  {
167      FD_SET( fd, &rfd );      int pos;
168      if( select( fd + 1, &rfd, NULL, NULL, &tv ) == SOCKET_ERROR )  
169          return SOCKET_ERROR;      if (!hostname)
170      if( FD_ISSET( fd, &rfd ) )          return hostname;
171          return 1;  
172      return 0;      pos = check_URL (hostname);
173  } /* sock_select */      if (pos > 0)
174            hostname += pos;
175        return hostname;
176  static int  }
177  sock_read( int fd, char *buf, int buflen, int *nbytes )  
178  {        
179      DWORD nread;  /* Parse the keyserver response and extract the human
180      int nleft = buflen;     readable text passages. */
181      int rc, n = 0;  static int
182    parse_keyserver_error (const char *resp, char *txt, size_t txtlen)
183      while (nleft > 0) {  {
184          if (n >= 10)      char *p, *p2;
185              return WPTERR_WINSOCK_TIMEOUT;  
186          if ( (rc = sock_select( fd )) == SOCKET_ERROR )      /* If we find no 'Error' substring we assume a success. */
187              return SOCKET_ERROR;      if (!stristr (resp, "Error"))
188          else if( !rc )          return -1;
189              n++;  
190          else {      memset (txt, 0, txtlen);
191              nread = recv(fd, buf, nleft, 0);      p = strstr (resp, "\r\n\r\n");
192              if (nread == SOCKET_ERROR)      if (!p)
193                  return SOCKET_ERROR;          return -1;
194              else if (!nread)      resp += (p-resp);
195                  break;      p = strstr (resp, "<h1>");
196              nleft -= nread;      if (!p)
197              buf += nread;          return -1;
198          }            resp += (p-resp)+strlen ("<h1>");
199      }      p = strstr (resp, "</h1>");
200      if (nbytes)      if (!p)
201          *nbytes = buflen - nleft;          return -1;
202                resp += (p-resp)+strlen ("</h1>");
203      return 0;      p2 = strstr (resp, "</body>");
204  } /* sock_read */      if (p2 != NULL)
205            memcpy (txt, resp, (p2-resp));
206        else {
207  static int          if (!strnicmp (resp, "<p>", 3))
208  sock_write( int fd, const char *buf, int buflen )              resp += 3;
209  {          while (resp && (*resp == '\r' || *resp == '\n'))
210      DWORD nwritten;              resp++;
211      int nleft = buflen;          memcpy (txt, resp, strlen (resp));
212        }
213      while (nleft > 0) {      return 0;
214          nwritten = send (fd, buf, nleft, 0);  }
215          if (nwritten == SOCKET_ERROR)  
216              return SOCKET_ERROR;  
217          nleft -= nwritten;  /* Check that the keyserver response indicates an OK.
218          buf += nwritten;             Return 0 on success. */
219      }  static int
220    check_hkp_response (const char *resp, int recv)
221      return 0;  {
222  } /* sock_write */      int ec;
223    
224        ec = recv ? WPTERR_WINSOCK_RECVKEY : WPTERR_WINSOCK_SENDKEY;
225  void      if (!resp)
226  set_default_kserver (void)          return ec;
227  {      log_debug ("check_hkp_response: '%s'\r\n", resp);    
228      char * p = get_reg_entry_keyserver ("Default");      if (!strstr (resp, "HTTP/1.0 200 OK") &&
229      free_if_alloc (default_keyserver);          !strstr (resp, "HTTP/1.1 200 OK") &&
230      default_keyserver = p && *p != ' ' ? p : m_strdup (DEF_HKP_KEYSERVER);          !strstr (resp, "HTTP/1.0 500 OK") &&
231      p = get_reg_entry_keyserver ("Default_Port");          !strstr (resp, "HTTP/1.1 500 OK"))
232      if (p && *p) {          return ec; /* http error */
233          default_keyserver_port = (u16)strtoul (p, NULL, 10);  
234          free_if_alloc (p);      if (!parse_keyserver_error (resp, hkp_err_msg, DIM (hkp_err_msg)-2)) {
235      }          if (!strlen (hkp_err_msg))
236      else              _snprintf (hkp_err_msg, DIM (hkp_err_msg)-1,
237          default_keyserver_port = HKP_PORT;                          "Unknown keyserver error");
238  } /* set_default_kserver */          hkp_has_err = 1;
239            return ec;
240        }
241  /*      return 0;
242   * Initialize the Winsock2 interface.  }
243   */  
244  int  
245  wsock_init (void)  /* Read a single line (\r\n) from a socket.
246  {     Return 0 on success. */
247      WSADATA wsa;  static int
248    sock_getline (int fd, char *buf, int buflen, int *nbytes)
249      if (WSAStartup (0x202, &wsa))  {
250          return WPTERR_WINSOCK_INIT;      char ch;
251      set_default_kserver ();      int nread;
252      return 0;      
253  } /* wsock_init */      if (nbytes)
254            *nbytes = 0;
255        *buf = 0;
256  /*      nread = 0;
257   * Should be called after the keyserver access.      while (recv (fd, &ch, 1, 0) > 0) {
258   */          *buf++ = ch;
259  void          nread++;
260  wsock_end (void)          if (ch == '\r')
261  {              continue; /* remove this char. */
262      int i;          if (ch == '\n' || nread == (buflen - 1)) {
263                *buf = 0;
264      free_if_alloc (default_keyserver);              if (nbytes)
265      default_keyserver = NULL;                  *nbytes = nread;
266      for (i=0; i < MAX_KEYSERVERS; i++) {              return 0;
267          if (server[i].used)          }
268              free_if_alloc (server[i].name);      }
269      }  
270      WSACleanup ();      return -1;
271  } /* wsock_end */  }
272    
273    
274  const char*  /* Perform a select() on the given fd to find out
275  wsock_strerror( void )     is there is data for reading. Wait at least @nsecs milli seconds. */
276  {      static int
277      static char buf[384];  sock_select (int fd, int nmsecs)
278      int ec = WSAGetLastError( );  {
279            FD_SET rfd;
280      switch ( ec ) {      timeval tv = {0, nmsecs*1000};
281      case WSAENETDOWN: return _("The network subsystem has failed");      
282      case WSAHOST_NOT_FOUND: return _("Authoritative Answer Host not found");                  FD_ZERO (&rfd);
283      case WSAETIMEDOUT: return _("The connection has been dropped because of a network failure");      FD_SET (fd, &rfd);
284      default: _snprintf( buf, sizeof (buf) -1, _("Unknown Winsock error ec=%d"),ec); return buf;      if (select (fd + 1, &rfd, NULL, NULL, &tv) == SOCKET_ERROR) {
285      }          log_debug ("sock_select: select() failed ec=%d.\r\n", net_errno);
286      return NULL;          return SOCKET_ERROR;
287  } /* wsock_strerror */      }
288        if (FD_ISSET (fd, &rfd))
289            return 1;
290  const char*      return 0;
291  kserver_strerror( void )  }
292  {        
293      if( hkp_err )  
294          return hkp_errmsg;  /* Read from a socket @fd to buffer @buf with a fixed timeout
295      return NULL;     of 10 seconds. The amount of bytes which were read are
296  } /* kserver_strerror */     returned in @nbytes.
297       Return value: 0 on success. */
298    static int
299  const char *  sock_read (int fd, char *buf, size_t buflen, int *nbytes)
300  kserver_get_hostname (int idx, int type, u16 *port)  {    
301  {      size_t nleft = buflen;
302      if (type == -1) {      size_t n;
303          *port = default_keyserver_port;      int nread;
304          return default_keyserver;      int rc;
305      }      
306      else if (!type && idx < DIM (server_list)) {      if (nbytes)
307          *port = HKP_PORT;          *nbytes = 0;
308          return server_list[idx];      n = 0;
309      }      while (nleft > 0) {
310      return NULL;          if (n >= default_socket_timeout)
311  }              return WPTERR_WINSOCK_TIMEOUT;
312            rc = sock_select (fd, 400);
313            if (rc == SOCKET_ERROR)
314  int              return rc;
315  kserver_check_inet_connection (void)          else if (!rc)
316  {              n++;
317      int fd;          else {
318                nread = recv (fd, buf, nleft, 0);
319      if (!kserver_connect (default_keyserver, default_keyserver_port, &fd)) {              if (nread == SOCKET_ERROR) {
320          closesocket (fd);                  log_debug ("sock_read: recv() failed ec=%d.\r\n", net_errno);
321          return 0;                  return SOCKET_ERROR;
322      }              }
323      return -1;              else if (!nread)
324  }                  break;
325                nleft -= nread;
326                buf += nread;
327  /*          }      
328   * If the request contains the keyid, it have to be      }
329   * always postfix with '0x'+keyid. This code checks      if (nbytes)
330   * if the keyid is a decimal value and if so if it contains          *nbytes = buflen - nleft;
331   * the '0x'. If not it is inserted.          
332   */      return 0;
333  const char*  }
334  kserver_check_keyid (const char *keyid)  
335  {        
336      static char id[20];  /* Helper to create a string from the gpgme data and
337       then release the gpgme data object. */
338      if (strstr (keyid, "@"))  char*
339          return keyid; /* email address */  data_release_and_get_mem (gpgme_data_t in, size_t *r_bufferlen)
340      if (strncmp (keyid, "0x", 2)) {  {    
341          memset (&id, 0, sizeof (id));      char *buffer, *p;
342          _snprintf (id, sizeof (id)-1, "0x%s", keyid);      size_t n;
343          return id;  
344      }      gpg_data_putc (in, '\0');
345      return keyid;      p = gpgme_data_release_and_get_mem (in, &n);
346  } /* kserver_check_keyid */      buffer = m_strdup (p);
347        if (r_bufferlen)
348            *r_bufferlen = n;
349  static void      gpgme_free (p);
350  kserver_update_proxyuser (const char *proxy_user, const char *proxy_pass)      return buffer;
351  {  }
352      char t[257]; /* user:pass = 127+1+127+1 = 257 */  
353    
354      free_if_alloc (proxy.base64_user);  /* Read much data as possible from the socket @fd and
355      proxy.base64_user = new char[4*strlen( proxy_user ) / 3 + 32];     return the data in @buffer. Caller must free data.
356      if( !proxy.base64_user )     Return value: 0 on success. */
357          BUG (0);  int
358      _snprintf (t, sizeof (t)-1, "%s:%s", proxy_user, proxy_pass);  sock_read_ext (int fd, char **buffer, size_t *r_bufferlen)
359      base64_encode (t, proxy.base64_user, 257);  {
360      free_if_alloc (proxy.user);      gpgme_data_t dh;
361      free_if_alloc (proxy.pass);      char buf[1024];
362      proxy.user = m_strdup (proxy_user);      size_t timeout=0;
363      proxy.pass = m_strdup (proxy_pass);      int rc;
364  } /* kserver_update_proxyuser */  
365        *buffer = NULL;
366        if (gpgme_data_new (&dh))
367  static int          return SOCKET_ERROR;
368  check_URL (const char * buf)      while (timeout < default_socket_timeout) {
369  {          rc = sock_select (fd, 500);
370      if (strlen (buf) < 7)          if (rc == SOCKET_ERROR) {
371          return -1;              gpgme_data_release (dh);
372      if( !strstr (buf, "ldap://")              return rc;
373          && !strstr (buf, "http://")          }
374          && !strstr (buf, "finger://")          else if (!rc)
375          && !strstr (buf, "hkp://"))              timeout++; /* socket not ready yet. */
376          return -1;          else {
377      return 0;              int nread = recv (fd, buf, DIM (buf), 0);
378  } /* check_URL */              log_debug ("recv n=%d bytes\r\n", nread);
379                    if (nread == SOCKET_ERROR)
380                    return SOCKET_ERROR;
381  static int              else if (!nread)
382  proto_from_URL (const char * buf)                  break;
383  {              gpgme_data_write (dh, buf, nread);
384      if (strstr( buf, "ldap"))          }
385          return KSPROTO_LDAP;      }
386      else if (strstr( buf, "finger"))      
387          return KSPROTO_FINGER;      if (timeout >= default_socket_timeout) {
388      return KSPROTO_HTTP;          gpgme_data_release (dh);
389  } /* proto_from_URL */          log_debug ("sock_read_ext: timeout\r\n");
390            return WPTERR_WINSOCK_TIMEOUT;
391        }
392  void      log_debug ("sock_read_ext: success\r\n");
393  keyserver_set_default (const char * hostname, u16 port)      *buffer = data_release_and_get_mem (dh, r_bufferlen);
394  {      return 0;
395      if (hostname) {  }
396          free_if_alloc (default_keyserver);  
397          default_keyserver = m_strdup (hostname);  
398          if (!default_keyserver)  /* Write the buffer @buf with the length @buflen to a socket @fd. */
399              BUG (0);  static int
400          default_keyserver_port = port;  sock_write (int fd, const char *buf, size_t buflen)
401      }  {
402      server[0].name =  default_keyserver;      int nwritten;
403      server[0].used = 1;      int nleft = buflen;
404      server[0].port = port;  
405      server[0].proto = proto_from_URL (default_keyserver);      while (nleft > 0) {
406  } /* keyserver_set_default */          nwritten = send (fd, buf, nleft, 0);
407            if (nwritten == SOCKET_ERROR) {
408                log_debug ("sock_write: send() failed ec=%d\r\n", net_errno);
409  static const char *              return SOCKET_ERROR;
410  skip_whitespace (const char * str)          }
411  {          nleft -= nwritten;
412      while (str && *str)          buf += nwritten;
413      {      }
414          if (*str == ' ' ||  
415              *str == '\t' ||      return 0;
416              *str == '\n' ||  }
417              *str == '\r')  
418          {  
419              str++;  /* Initialize the Winsock2 interface.*/
420              continue;  int
421          }  wsock_init (void)
422          break;  {
423      }      WSADATA wsa;
424      return str;  
425  }      if (WSAStartup (0x202, &wsa)) {
426            log_debug ("wsock_init: WSAStartup failed ec=%d\r\n", net_errno);
427            return WPTERR_WINSOCK_INIT;
428  int      }
429  kserver_load_conf (const char * conf)      return 0;
430  {  }
431      struct stat statbuf;  
432      FILE *fp;  
433      char buf[1024], * s, * p;  /* Cleanup the Winsock2 interface and free all resources. */
434      char *user = NULL, *pass = NULL;      void
435      int pos, proxy_auth = 0;  wsock_end (void)
436      int no_config=0;  {
437            if (default_keyserver != NULL) {
438      for (pos = 0; pos < MAX_KEYSERVERS; pos++) {          char str_port[64];
439          server[pos].used = 0;          set_reg_entry_keyserver ("Default", default_keyserver);
440          server[pos].port = HKP_PORT;          free_if_alloc (default_keyserver);
441      }          sprintf (str_port, "%d", default_keyserver_port);
442                set_reg_entry_keyserver ("Default_Port", str_port);
443      fp = fopen (conf, "rb");      }  
444      if (!fp) {      for (int i=0; i < MAX_KEYSERVERS; i++) {
445          for( pos = 0; server_list[pos]; pos++ ) {          if (server[i].name != NULL)
446              server[pos].used = 1;              free_if_alloc (server[i].name);
447              server[pos].name = (char *)server_list[pos];      }
448              server[pos].proto = proto_from_URL( server_list[pos] );      kserver_proxy_release (&proxy);
449          }      WSACleanup ();
450          no_config=1;      log_debug ("wsock_end: cleanup finished.\r\n");
451      }  }
452      get_reg_proxy_prefs( &proxy.host, &proxy.port, &user, &pass );  
453      if( user && pass )  
454          kserver_update_proxyuser( user, pass );  /* Return a string representation of a winsock error. */
455      else if( user && !pass || !user && pass ) {  const char*
456          msg_box( NULL, _("Invalid proxy configuration."  wsock_strerror (void)
457                           "You need to set a user and a password"  {
458                           "to use proxy authentication!"), _("Proxy Error"), MB_ERR );      int ec = WSAGetLastError ();
459      }      
460      /* check if the host has a http:// prefix and skip it */      if (!ec)
461      if( proxy.host && !strncmp( proxy.host, "http://", 7 ) ) {          return "";
462          const char *s = proxy.host+7;      switch (ec) {
463          char * p = m_strdup (s);      case WSANOTINITIALISED:
464          if (!p)          return _("Winsock subsystem has not been initialized");
465              BUG (0);          
466          free_if_alloc (proxy.host);      case WSAENETDOWN:
467          proxy.host = p;          return _("Network subsystem has failed");
468      }  
469      free_if_alloc (user);  
470      free_if_alloc (pass);      case WSATRY_AGAIN:
471                return _("Nonauthoritative host not found, or server failure");
472      pos = 0;          
473      while( fp && !feof( fp ) ) {      case WSAHOST_NOT_FOUND:
474          s = fgets (buf, sizeof (buf)-1, fp);          return _("Could not resolve host name");
475          if (!s)  
476              break;      case WSAETIMEDOUT:
477          if (strstr (buf, "\r\n"))      case WSAECONNABORTED:
478              buf[strlen (buf)-2] = '\0';          return _("Connection timeout");
479          if (strstr (buf, "\n"))  
480              buf[strlen (buf)-1] = '\0';      case WSAENETRESET:
481          s = (char *)skip_whitespace (buf);      case WSAECONNRESET:
482          if (*s == '#' || strlen (s) < 7)          return _("Connection resetted by peer");
483              continue;  
484          if (check_URL (s)) {      case WSAENETUNREACH:
485              msg_box (NULL, _("All entries of this file must have a valid prefix.\n"          return _("The network cannot be reached from this host at this time");
486                               "Currently HKP/HTTP, LDAP and FINGER are supported.\n"),          
487                               _("Keyserver Error"), MB_ERR);      case WSAEHOSTUNREACH:
488              continue;          return _("A socket operation was attempted to an unreachable host");
489          }          
490          p = strchr (s+6, ':');      case WSAECONNREFUSED:
491          server[pos].used = 1;          return _("The attempt to connect was forcefully rejected");
492          server[pos].proto = proto_from_URL (s);          
493          if (!p)      case WSAESHUTDOWN:
494              server[pos].name = m_strdup (s);          return _("Socket has been shutdown");
495          else {        
496              server[pos].port = atol (p+1);      default:
497              if (server[pos].port < 0 || server[pos].port > 65536)          break;
498                  server[pos].port = HKP_PORT;      }
499              server[pos].name = new char [(p-s)+2];  
500              if (!server[pos].name)      return _("Unknown network error");
501                  BUG (0);  }
502              memset (server[pos].name, 0, (p-s)+2);  
503              memcpy (server[pos].name, s, (p-s));  
504          }  /* Set default socket timeout for all reading operations. */
505          pos++;  void
506          if (pos > MAX_KEYSERVERS)  kserver_set_socket_timeout (size_t nsec)
507          {  {
508              msg_box (NULL, _("The keyserver limit is exceeded"), _("Keyserver Warning"), MB_INFO);      if (nsec < 0 || nsec > 3600)
509              break;          nsec = 10;
510          }      default_socket_timeout = nsec;
511      }  }
512      if (fp)  
513          fclose (fp);  
514      if (!pos)  /* Return the last keyserver error as a string. */
515      {  const char*
516          /* only issue an error if the config file exist but it has no valid entries. */  kserver_strerror (void)
517          keyserver_set_default (NULL, HKP_PORT);  {      
518          if (!no_config)      return hkp_has_err? hkp_err_msg : NULL;
519              return WPTERR_CONFIG_FILE;    }
520      }  
521    
522      if (!stat (conf, &statbuf))  /* Read a keyserver from the list at index @idx.
523          conf_timestamp = statbuf.st_mtime;     Return value: keyserver name at the given position. */
524      return 0;  const char*
525  } /* kserver_load_conf */  kserver_get_hostname (int idx, int type, WORD *port)
526    {
527        if (type == -1) {
528  const char *          *port = default_keyserver_port;
529  kserver_get_proxy (int * r_port)          return default_keyserver;
530  {      }
531      if (proxy.host)      else if (!type && (size_t)idx < DIM (server_list)) {
532      {          *port = HKP_PORT;
533          if (r_port)          return server_list[idx];
534              *r_port = proxy.port;      }
535          return proxy.host;      return NULL;
536      }  }
537      return NULL;  
538  } /* kserver_get_proxy */  
539    /* Check if the computer is connected to the internet.
540       Return 0 on success -1 otherwise. */
541  const char *  int
542  kserver_get_proxy_info( int id )  kserver_check_inet_connection (void)
543  {  {
544      switch( id ) {        int fd;
545      case PROXY_USER: return proxy.user;  
546      case PROXY_PASS: return proxy.pass;      if (!kserver_connect (default_keyserver, default_keyserver_port, &fd)) {
547      }          closesocket (fd);
548      return NULL;          return 0;
549  } /* kserver_get_proxy_info */      }
550        log_debug ("kserver_check_inet_connection: no inet connection.\r\n");
551        return -1;
552  /*  }
553   * Connect to the keyserver 'hostname'.  
554   * We always use the HKP port.  
555   */  /* If the request contains the keyid, it have to be
556  int     always postfix with '0x'+keyid. This code checks
557  kserver_connect (const char *hostname, u16 port, int *conn_fd)     if the keyid is a decimal value and if so if it contains
558  {     the '0x'. If not it is inserted. */
559      int rc, fd;  const char*
560      u32 iaddr;  kserver_check_keyid (const char *keyid)
561      char host[128] = {0};  {      
562      struct hostent *hp;      static char id[64];
563      struct sockaddr_in sock;  
564        if (strstr (keyid, "@"))
565      if (debug)          return keyid; /* email address */
566          log_f ("kserver_connect: %s:%d\r\n", hostname, port);      if (strncmp (keyid, "0x", 2)) {
567      if (!port)          memset (&id, 0, sizeof (id));
568          port = HKP_PORT;          _snprintf (id, DIM (id)-1, "0x%s", keyid);
569      if (conn_fd)          return id;
570          *conn_fd = 0;      }
571      hostname = skip_type_prefix (hostname);      return keyid;
572        }
573      memset (&sock, 0, sizeof (sock));  
574      sock.sin_family = AF_INET;  
575      sock.sin_port = proxy.host? htons (proxy.port) : htons (port);  /* Update the keyserver proxy user. */
576      if (proxy.host)  static void
577          strncpy (host, proxy.host, 127);  update_proxy_user (const char *proxy_user, const char *proxy_pass)
578      else  {
579          strncpy (host, hostname, 127);      char t[257]; /* user:pass = 127+1+127+1 = 257 */
580            size_t n;
581      if ((iaddr = inet_addr (host)) != INADDR_NONE)  
582          memcpy (&sock.sin_addr, &iaddr, sizeof (iaddr));      n = 4*(strlen (proxy_user) + strlen (proxy_pass))/3 + 32 + 2;
583      else if ((hp = gethostbyname (host))) {      free_if_alloc (proxy.base64_user);
584          if (hp->h_addrtype != AF_INET)      proxy.base64_user = safe_alloc (n+1);
585              return WPTERR_WINSOCK_RESOLVE;      _snprintf (t, DIM (t)-1, "%s:%s", proxy_user, proxy_pass);
586          else if (hp->h_length != 4)      base64_encode (t, proxy.base64_user);
587              return WPTERR_WINSOCK_RESOLVE;      free_if_alloc (proxy.user);
588          memcpy (&sock.sin_addr, hp->h_addr, hp->h_length);      free_if_alloc (proxy.pass);
589      }      proxy.user = m_strdup (proxy_user);
590      else {      proxy.pass = m_strdup (proxy_pass);
591          if (debug)  }
592              log_f ("gethostbyname: failed.\r\n");  
593          return WPTERR_WINSOCK_RESOLVE;  
594      }  /* Set the default keyserver. The position is always one. */
595      fd = socket (AF_INET, SOCK_STREAM, 0);  void
596      if (fd == INVALID_SOCKET)    keyserver_set_default (const char *hostname, WORD port)
597          return WPTERR_WINSOCK_SOCKET;  {
598      rc = connect (fd, (struct sockaddr *) &sock, sizeof (sock));      int pos=0;
599      if (rc == SOCKET_ERROR) {      
600          if (debug)      if (port == 0)
601              log_f ("connect: failed.\r\n");          port = HKP_PORT;
602          closesocket(fd);      
603          return WPTERR_WINSOCK_CONNECT;      free_if_alloc (default_keyserver);
604      }      default_keyserver = m_strdup (hostname);
605        default_keyserver_port = port;
606      if (conn_fd)      
607          *conn_fd = fd;      while (pos < MAX_KEYSERVERS) {
608      WSASetLastError(0);          if (server[pos].is_default)
609      return 0;              break;
610  } /* kserver_connect */          if (server[pos].used) {
611                pos++;
612                continue;
613  static char*          }
614  kserver_urlencode (const char *pubkey, int octets, int *newlen)          break;
615  {      }
616      char *p, numbuf[5];      free_if_alloc (server[pos].name);
617      size_t j = 0;      server[pos].name =  m_strdup (default_keyserver);
618      int i, size;      server[pos].used = 1;
619            server[pos].port = port;
620      p = new char [2*octets];      server[pos].is_default = 1;
621      if (!p)  }
622          BUG (0);  
623    
624      for (size=0, i=0; i<octets; i++) {  /* Skip all kind of whitespace chars in @str.
625          if (isalnum (pubkey[i]) || pubkey[i] == '-') {  static const char*
626              p[size] = pubkey[i];  skip_whitespace (const char *str)
627              size++;  {
628          }      while (str && *str) {
629          else if (pubkey[i] == ' ') {          if (*str == ' ' ||
630              p[size] = '+';              *str == '\t' ||
631              size++;              *str == '\n' ||
632          }              *str == '\r') {
633          else {              str++;
634              sprintf(numbuf, "%%%02X", pubkey[i]);              continue;
635              for (j = 0; j<strlen(numbuf); j++) {          }
636                  p[size] = numbuf[j];          break;
637                  size++;      }
638              }      return str;
639          }  }*/
640      }  
641      p[size] = '\0';  
642      *newlen = size;  /* Return the specified keyserver config setting @key as an integer. */
643      return p;  static int
644  } /* kserver_urlencode */  get_conf_kserver_int (const char *key)
645    {
646        char *p;
647  /*      int val = 0;
648   * Format a request for the given keyid (send).  
649   */      p = get_reg_entry_keyserver (key);
650  static char*      if (p && *p)
651  kserver_send_request (const char *hostname, u16 port, const char *pubkey, int octets)          val = atoi (p);
652  {      free_if_alloc (p);
653      char *request = NULL, *enc_pubkey = NULL;      return val;
654      int reqlen, enc_octets;  }
655        
656      if (debug)  
657          log_f ("kserver_send_request: %s:%d\n", hostname, port);  /* Read the proxy configuration and store it into @prox. */
658      if (!port)  static void
659          port = HKP_PORT;  read_proxy_config (keyserver_proxy_t prox)
660      reqlen = 512 + strlen (hostname) + 2*strlen (pubkey);  {
661      request = new char[reqlen];      char *proto;
662      if (!request)  
663          BUG (0);      if (!prox)
664      enc_pubkey = kserver_urlencode (pubkey, octets, &enc_octets);          return;
665      if (!enc_pubkey || !enc_octets) {      
666          free_if_alloc (request);      proto = get_reg_entry_keyserver("Proto");
667          return NULL;      if (proto != NULL && strlen (proto) > 0)
668      }          prox->proto = atoi (proto);
669            else
670      if (proxy.user) {          prox->proto = PROXY_PROTO_NONE;
671          _snprintf (request, reqlen-1,      free_if_alloc (proto);
672                     "POST http://%s:%d/pks/add HTTP/1.0\r\n"      
673                     "Referer: \r\n"      free_if_alloc (prox->host);
674                     "User-Agent: WinPT/W32\r\n"      prox->host = get_reg_entry_keyserver ("Host");
675                     "Host: %s:%d\r\n"      
676                     "Proxy-Authorization: Basic %s\r\n"      free_if_alloc (prox->user);
677                     "Content-type: application/x-www-form-urlencoded\r\n"      prox->user = get_reg_entry_keyserver ("User");
678                     "Content-length: %d\r\n"      
679                     "\r\n"      free_if_alloc (prox->pass);
680                     "keytext=%s"      prox->pass = get_reg_entry_keyserver ("Pass");
681                     "\n",      
682                     skip_type_prefix (hostname), port, hostname, port,      prox->port = get_conf_kserver_int ("Port");
683                     proxy.base64_user, enc_octets+9, enc_pubkey);  }
684      }  
685      else {  
686          _snprintf (request, reqlen-1,  static int
687                     "POST /pks/add HTTP/1.0\r\n"  is_keyserver_present (const char *name)
688                     "Referer: \r\n"  {
689                     "User-Agent: WinPT/W32\r\n"      for (int i=0; i < MAX_KEYSERVERS; i++) {
690                     "Host: %s:%d\r\n"          if (server[i].name != NULL &&
691                     "Content-type: application/x-www-form-urlencoded\r\n"              stricmp (server[i].name, name) == 0)
692                     "Content-length: %d\r\n"              return 1;
693                     "\r\n"      }
694                     "keytext=%s"      return 0;
695                     "\n",  }
696                     skip_type_prefix (hostname), port, enc_octets+9, enc_pubkey);  
697      }  /* Load the keyserver configuration. */
698      free_if_alloc (enc_pubkey);  int
699      if (debug)  kserver_load_conf (void)
700          log_f("%s\n", request);  {
701      return request;      char *str_server, *str_port;
702  } /* kserver_send_request */      int port, list_pos;    
703        
704        /* If a preferred keyserver is available, load
705  /*       * the values and store it at position 0.
706   * Interface receiving a public key.       */
707   */      str_server = get_reg_entry_keyserver("Default");
708  int      if (str_server && *str_server) {
709  kserver_recvkey (const char *hostname, u16 port, const char *keyid, char *key, int maxkeylen)          port = HKP_PORT;
710  {                str_port = get_reg_entry_keyserver("Default_Port");
711      int rc, n;          if (str_port && *str_port)
712      int conn_fd;              port = atoi (str_port);        
713      char *request = NULL;          keyserver_set_default (str_server, port);
714                free_if_alloc (str_port);
715      if (!port)      }
716          port = HKP_PORT;      free_if_alloc (str_server);
717      hkp_err = 0; /* reset */          
718      rc = kserver_connect (hostname, port, &conn_fd);      /* Now add the default pool servers after the
719      if (rc)       * preferred keyserver if present.
720          goto leave;       */
721            list_pos = 1;
722      request = new char[300+1];      for (int i=0; server_list[i] != NULL; i++) {
723      if (!request)          if (is_keyserver_present (server_list[i]))
724          BUG (0);              continue;
725                server[list_pos].used = 1;
726      if (proxy.host && proxy.user) {          server[list_pos].port = HKP_PORT;
727          _snprintf (request, 300,          server[list_pos].name = m_strdup (server_list[i]);
728              "GET http://%s:%d/pks/lookup?op=get&search=%s HTTP/1.0\r\n"          server[list_pos].is_default = 0;
729              "Proxy-Authorization: Basic %s\r\n\r\n",          list_pos++;
730              skip_type_prefix (hostname), port, keyid, proxy.base64_user);          if (list_pos > MAX_KEYSERVERS)
731      }              break;
732      else if (proxy.host) {      }
733          _snprintf (request, 300,      return 0;
734              "GET http://%s:%d/pks/lookup?op=get&search=%s HTTP/1.0\r\n\r\n",  }
735              skip_type_prefix (hostname), port, keyid);  
736      }      
737      else {  /* Connect to the keyserver @hostname (port @port).
738          _snprintf (request, 300,     Return value: 0 on success */
739              "GET /pks/lookup?op=get&search=%s HTTP/1.0\r\n\r\n", keyid);  int
740      }    kserver_connect (const char *hostname, WORD port, int *conn_fd)
741      if (debug)  {        
742          log_f ("%s\n", request);      struct hostent *hp;
743            struct sockaddr_in sock;
744      rc = sock_write (conn_fd, request, strlen (request));      char host[128] = {0};
745      if (rc == SOCKET_ERROR) {      DWORD iaddr;
746          rc = WPTERR_WINSOCK_RECVKEY;      bool use_proxy = proxy.host != NULL;
747          goto leave;      int rc, fd;
748      }  
749            if (!port)
750      rc = sock_read( conn_fd, key, maxkeylen, &n );          port = HKP_PORT;
751      if( rc == SOCKET_ERROR ) {      if (conn_fd)
752          rc = WPTERR_WINSOCK_RECVKEY;          *conn_fd = 0;
753          goto leave;      hostname = skip_type_prefix (hostname);
754      }      log_debug ("kserver_connect: %s:%d\r\n", hostname, port);
755            
756      if( debug )      if (use_proxy && proxy.proto == PROXY_PROTO_HTTP)
757          log_f("%s\n", key);          port = proxy.port;
758            memset (&sock, 0, sizeof (sock));
759      rc = check_hkp_response( key, 1 );      sock.sin_family = AF_INET;
760      if( rc )      sock.sin_port = htons (port);
761          goto leave;      strncpy (host, use_proxy? proxy.host : hostname, DIM (host)-1);
762        
763      WSASetLastError( 0 );      if ((iaddr = inet_addr (host)) != INADDR_NONE)
764                memcpy (&sock.sin_addr, &iaddr, sizeof (iaddr));
765  leave:      else if ((hp = gethostbyname (host))) {
766      closesocket( conn_fd );          if (hp->h_addrtype != AF_INET || hp->h_length != 4) {
767      free_if_alloc( request );              log_debug ("gethostbyname: unknown address type.\r\n");
768      return rc;              return WPTERR_WINSOCK_RESOLVE;
769  } /* kserver_recvkey */          }
770            memcpy (&sock.sin_addr, hp->h_addr, hp->h_length);
771        }
772  /*      else {
773   * Interface to send a public key.          log_debug ("gethostbyname(%s): failed ec=%d.\r\n", host, net_errno);
774   */          return use_proxy? WPTERR_WINSOCK_PROXY : WPTERR_WINSOCK_RESOLVE;
775  int      }
776  kserver_sendkey (const char *hostname, u16 port, const char *pubkey, int len )      fd = socket (AF_INET, SOCK_STREAM, 0);
777  {      if (fd == INVALID_SOCKET)  
778      int n, rc;          return WPTERR_WINSOCK_SOCKET;
779      int conn_fd;      rc = connect (fd, (struct sockaddr *) &sock, sizeof (sock));
780      char *request = NULL;      if (rc == SOCKET_ERROR) {
781      char log[2048];          log_debug ("connect: failed ec=%d.\r\n", net_errno);
782                closesocket (fd);
783      hkp_err = 0; /* reset */          return use_proxy? WPTERR_WINSOCK_PROXY : WPTERR_WINSOCK_CONNECT;
784      rc = kserver_connect (hostname, port, &conn_fd);      }
785      if (rc)      
786          goto leave;      if (conn_fd)
787                *conn_fd = fd;
788      request = kserver_send_request (hostname, port, pubkey, len);      WSASetLastError (0);
789      if( request == NULL ) {      return 0;
790          rc = WPTERR_GENERAL;  }
791          goto leave;      
792      }  
793        /* Check if the URL needs to be encoded or not.
794      rc = sock_write( conn_fd, request, lstrlen(request) );  static bool
795      if( rc == SOCKET_ERROR ) {  URL_must_encoded (const char *url)
796          rc = WPTERR_WINSOCK_SENDKEY;  {
797          goto leave;          if (strchr (url, '.') || strchr (url, '@') || strchr (url, ' '))
798      }          return true;
799            return false;
800      rc = sock_read( conn_fd, log, sizeof (log)-1, &n );  }*/
801      if( rc == SOCKET_ERROR ) {  
802          rc = WPTERR_WINSOCK_SENDKEY;  
803          goto leave;  /* Perform URL encoding of the given data. */
804      }  static char*
805      if (debug)  URL_encode (const char *url, DWORD ulen, DWORD *ret_nlen)
806          log_f("%s\n", log);  {
807            gpgme_data_t hd;
808      rc = check_hkp_response( log, 0 );      char numbuf[8], *p;
809      if( rc )      size_t i, nlen;
810          goto leave;  
811            if (gpgme_data_new (&hd))
812      WSASetLastError( 0 );          BUG (0);
813            for (i=0; i < ulen; i++) {
814  leave:          if (isalnum (url[i]) || url[i] == '-')
815      closesocket( conn_fd );              gpg_data_putc (hd, url[i]);
816      free_if_alloc( request );          else if (url[i] == ' ')
817      return rc;              gpg_data_putc (hd, '+');
818  } /* kserver_sendkey */          else {
819                sprintf (numbuf, "%%%02X", url[i]);
820                gpgme_data_write (hd, numbuf, strlen (numbuf));
821  int          }
822  kserver_search_init (const char * hostname, u16 port, const char * keyid, int * conn_fd)      }
823  {  
824      int rc, sock_fd;      p = data_release_and_get_mem (hd, &nlen);
825      char * request = NULL;      if (ret_nlen)
826                *ret_nlen = nlen;
827      rc = kserver_connect (hostname, port, &sock_fd);      return p;
828      if (rc) {  }
829          *conn_fd = 0;  
830          goto leave;  
831      }  /* Format a request for the given keyid (send). */
832        static char*
833      request = new char[300+1];  kserver_send_request (const char *hostname, WORD port,
834      if (!request)                        const char *pubkey, DWORD octets)
835          BUG (0);  {
836            const char *fmt;
837      if (proxy.host && proxy.user) {      char *request;
838          _snprintf (request, 300,      char *enc_pubkey;
839              "GET http://%s:%d/pks/lookup?op=index&search=%s HTTP/1.0\r\n"      DWORD enc_octets;
840              "Proxy-Authorization: Basic %s\r\n\r\n",      int reqlen;
841              skip_type_prefix (hostname), port, keyid, proxy.base64_user);  
842      }          log_debug ("kserver_send_request: %s:%d\r\n", hostname, port);
843      else if (proxy.host) {  
844          _snprintf (request, 300,      if (!port)
845              "GET http://%s:%d/pks/lookup?op=index&search=%s HTTP/1.0\r\n\r\n",          port = HKP_PORT;
846              skip_type_prefix (hostname), port, keyid);      enc_pubkey = URL_encode (pubkey, octets, &enc_octets);
847      }      reqlen = 2*strlen (hostname) + 2*32/*port*/ + enc_octets + 32 /*len*/ + 1;
848      else {      
849          _snprintf (request, 300,      if (proxy.user && proxy.proto == PROXY_PROTO_HTTP) {
850                     "GET /pks/lookup?op=index&search=%s HTTP/1.0\r\n\r\n", keyid);          fmt = "POST http://%s:%d/pks/add HTTP/1.0\r\n"
851      }                "Referer: \r\n"
852                      "User-Agent: WinPT/W32\r\n"
853      if (debug)                "Host: %s:%d\r\n"
854          log_f("%s\n", request);                "Proxy-Authorization: Basic %s\r\n"
855                      "Content-type: application/x-www-form-urlencoded\r\n"
856      if (sock_write (sock_fd, request, strlen (request)) == SOCKET_ERROR) {                "Content-length: %d\r\n"
857          rc = WPTERR_GENERAL;                "Connection: close\r\n"
858          goto leave;                "\r\n"
859      }                "keytext=%s"
860                      "\r\n";
861      *conn_fd = sock_fd;          reqlen += strlen (fmt) + strlen (proxy.base64_user) + 1;
862                request = safe_alloc (reqlen+1);
863  leave:          _snprintf (request, reqlen, fmt,
864      free_if_alloc (request);                     skip_type_prefix (hostname), port, hostname, port,
865      return rc;                     proxy.base64_user, enc_octets+9, enc_pubkey);
866  } /* kserver_search_init */      }
867        else {
868            fmt = "POST /pks/add HTTP/1.0\r\n"
869  int                "Referer: \r\n"
870  kserver_search_chkresp (int fd)                "User-Agent: WinPT/W32\r\n"
871  {                "Host: %s:%d\r\n"
872      char buf[128];                "Content-type: application/x-www-form-urlencoded\r\n"
873      int n=0, i=0;                "Content-length: %d\r\n"
874                  "Connection: close\r\n"
875      /* parse response 'HTTP/1.0 500 OK' */                "\r\n"
876      if (sock_getline (fd, buf, 127, &n))                "keytext=%s"
877          return WPTERR_KEYSERVER_NOTFOUND;                "\r\n";
878      if (strncmp (buf, "HTTP/1.", 7))          reqlen += strlen (fmt)+1;
879          return WPTERR_KEYSERVER_NOTFOUND;          request = safe_alloc (reqlen+1);
880      i = 8+1;          _snprintf (request, reqlen, fmt,
881      if (strncmp (buf+i, "200", 3))                     skip_type_prefix (hostname), port,
882          return WPTERR_KEYSERVER_NOTFOUND;                     enc_octets+9, enc_pubkey);
883      return 0;      }
884  } /* kserver_search_chkresp */  
885        free_if_alloc (enc_pubkey);
886        log_debug ("request:\r\n%s\r\n", request);
887  int      return request;
888  kserver_search (int fd, keyserver_key * key)  }
889  {  
890      char buf[1024], *p;  
891      int uid_len, nbytes, pos = 0;  /* Interface for receiving a public key. */
892        int
893      if (debug)  kserver_recvkey (const char *hostname, WORD port, const char *keyid,
894          log_f ("keyserver_search:\n");                   char **r_key, size_t *r_keylen)
895        {
896      if (sock_getline (fd, buf, sizeof (buf), &nbytes))          StringBuffer req;
897          return WPTERR_GENERAL;      const char *reqbuf;
898            int conn_fd;
899      if (debug)      int rc;
900          log_f ("%s\n", buf);  
901            if (!port)
902      if (!strncmp (buf, "pub", 3)) {          port = HKP_PORT;
903          key->bits = atol (buf+3);      hkp_has_err = 0; /* reset */
904          p = strchr (buf, '>');      rc = kserver_connect (hostname, port, &conn_fd);
905          if (p)      if (rc)
906              pos = p-buf+1;          goto leave;
907          memcpy (key->keyid, buf+pos, 8);  
908          key->keyid[8] = '\0';      if (proxy.host && proxy.user && proxy.proto == PROXY_PROTO_HTTP) {
909          p = strstr (buf, "</a>");          req = req + "GET http://" + skip_type_prefix (hostname) +
910          if (p)              ":" + port +
911              pos = p-buf+5;              "/pks/lookup?op=get&search=" + keyid + " HTTP/1.0\r\n" +
912          memcpy (key->date, buf+pos, 10);              "Proxy-Authorization: Basic " + proxy.base64_user + "\r\n" +
913          key->date[10] = '\0';              "Host: " + skip_type_prefix (hostname) + ":" + port + "\r\n"+
914          pos += 10;              "Connection: close\r\n"+
915          p = buf+pos+1;              "\r\n";
916          while (p && *p != '>')      }
917              p++;      else if (proxy.host && proxy.proto == PROXY_PROTO_HTTP) {
918          p++;          req = req + "GET http://" + skip_type_prefix (hostname) +
919          uid_len = strlen (p) - 10;              ":" + port + "/pks/lookup?op=get&search=" + keyid +
920          memcpy (key->uid, p, uid_len);              " HTTP/1.0\r\n" +
921          key->uid[uid_len] = '\0';              "Host: " + skip_type_prefix (hostname) + ":" + port + "\r\n"+
922          strcat (key->uid, ">");              "Connection: close\r\n"+
923          p = strchr (key->uid, '&');              "\r\n";
924          if (p) {      }
925              key->uid[(p-key->uid)] = '<';      else
926              memmove (key->uid+(p-key->uid)+1, key->uid+(p-key->uid)+4, strlen (key->uid)-3);          req = req + "GET /pks/lookup?op=get&search=" + keyid +    
927          }              " HTTP/1.0\r\n"+ // FIXME
928      }              "Host: " + skip_type_prefix (hostname) + ":" + port + "\r\n"+
929      else {              "Connection: close\r\n"+
930          key->bits = 0;              "\r\n";
931          memset (key, 0, sizeof *key);      
932      }      log_debug ("req:\r\n%s\r\n", req.getBuffer ());  
933        
934      return 0;      reqbuf = req.getBuffer ();
935  } /* kserver_search */      rc = sock_write (conn_fd, reqbuf, strlen (reqbuf));
936        if (rc == SOCKET_ERROR) {
937            rc = WPTERR_WINSOCK_RECVKEY;
938  static int          goto leave;
939  add_node( keyserver_cfgfile *cfg, const char *entry )      }
940  {      
941      keyserver_node *node;      rc = sock_read_ext (conn_fd, r_key, r_keylen);
942      char *p = NULL;      if (rc == SOCKET_ERROR) {
943                rc = WPTERR_WINSOCK_RECVKEY;
944      p = strchr( entry, '=' );          goto leave;
945      if( p == NULL )      }
946          return WPTERR_GENERAL;    
947      node = new keyserver_node;      log_debug ("response:\r\n%s\r\n", *r_key);
948      if( !node )      rc = check_hkp_response (*r_key, 1);
949          BUG( NULL );      if (rc)
950                goto leave;
951      memset( node, 0, sizeof *node );      
952      node->used = 1;      WSASetLastError (0);
953            
954      node->host.used = 1;  leave:
955      node->host.proto = proto_from_URL( entry );      closesocket (conn_fd);
956      memcpy( node->host.name, entry+7, p-entry-7 );      return rc;
957      node->next = cfg->list;  }
958      cfg->list = node;  
959        
960      return 0;  /* Interface to send a public key. */
961  } /* add_node */  int
962    kserver_sendkey (const char *hostname, WORD port,
963                     const char *pubkey, size_t len)
964  void  {
965  kserver_change_proxy( keyserver_proxy_ctx *ctx )      char *request = NULL;
966  {          char log[2048] = {0};
967      proxy.port = ctx->port;      int conn_fd, n;
968      free_if_alloc (proxy.host);      int rc;
969      proxy.host = ctx->host? m_strdup( ctx->host ) : NULL;      
970      free_if_alloc( proxy.pass );      hkp_has_err = 0; /* reset */
971      proxy.pass = ctx->pass? m_strdup( ctx->pass ) : NULL;      rc = kserver_connect (hostname, port, &conn_fd);
972      free_if_alloc( proxy.user );      if (rc)
973      proxy.user = ctx->user? m_strdup( ctx->user ) : NULL;          goto leave;
974      set_reg_proxy_prefs( proxy.host, proxy.port, proxy.user, proxy.pass );      
975  } /* kserver_change_proxy */      request = kserver_send_request (hostname, port, pubkey, len);
976        rc = sock_write (conn_fd, request, strlen (request));
977        if (rc == SOCKET_ERROR) {
978  int          rc = WPTERR_WINSOCK_SENDKEY;
979  kserver_read_config( const char *fname, keyserver_cfgfile **ret_cfg )          goto leave;    
980  {      }
981      FILE *fp;      
982      keyserver_cfgfile *cfg;      rc = sock_read (conn_fd, log, DIM (log)-1, &n);
983      char buf[256];      if (rc == SOCKET_ERROR) {
984      int rc = 0;          rc = WPTERR_WINSOCK_SENDKEY;
985                goto leave;
986      *ret_cfg = NULL;      }
987      fp = fopen( fname, "rb" );  
988      if( fp == NULL )      log_debug ("kserver_sendkey: read %d bytes\r\n%s\r\n", n, log);
989          return WPTERR_FILE_OPEN;      rc = check_hkp_response (log, 0);
990            if (rc)
991      cfg = new keyserver_cfgfile;          goto leave;
992      if ( !cfg )      
993          BUG( NULL );      WSASetLastError (0);
994      memset( cfg, 0, sizeof *cfg );  
995        leave:
996      while ( !feof( fp ) ) {      closesocket (conn_fd);
997          if ( fgets( buf, sizeof(buf)-1, fp ) == NULL )      free_if_alloc (request);
998              break;      return rc;
999          if ( *buf == '\r' || *buf == '\n' || *buf == '#' )  }
1000              continue;  
1001          buf[strlen(buf) -2] = '\0';  
1002          if ( !strncmp( buf, "use_proxy=", 10 ) ) {  /* Check keyserver response. */
1003              char *p = strchr(buf, ':');  static int
1004              if (!p)  kserver_search_chkresp (int fd)
1005                  continue;  {
1006              cfg->proxy.port = atol( buf+(p-buf+1) );      char buf[128];
1007              buf[p-buf] = '\0';      int n=0;
1008              cfg->proxy.host = m_strdup( buf+10 );      
1009          }      /* parse response 'HTTP/1.0 500 OK' */
1010          else if ( !strncmp( buf, "proxy_user=", 11 ) )      if (sock_getline (fd, buf, DIM (buf)-1, &n))
1011              cfg->proxy.user = m_strdup( buf+11 );          return WPTERR_KEYSERVER_NOTFOUND;
1012          else if ( !strncmp( buf, "proxy_pass=", 11 ) )  
1013              cfg->proxy.pass = m_strdup( buf+11 );      log_debug ("kserver_search_chkpresp: %s\r\n", buf);
1014          if ( !strncmp( buf, "http://", 7 )      if (strncmp (buf, "HTTP/1.", 7))
1015              || !strncmp( buf, "hkp://", 6 )          return WPTERR_KEYSERVER_NOTFOUND;
1016              || !strncmp( buf, "ldap://", 7 ) ) {      if (strncmp (buf+(8+1), "200", 3))
1017              add_node( cfg, buf );          return WPTERR_KEYSERVER_NOTFOUND;
1018              cfg->nlist++;      return 0;
1019          }  }
1020      }  
1021        
1022      fclose( fp );  /* End the keyserver search procedure. */
1023      *ret_cfg = cfg;  void
1024        kserver_search_end (int conn_fd)
1025      return rc;  {
1026  } /* kserver_read_config */      log_debug ("kserver_search_end: fd=%d\r\n", conn_fd);
1027        closesocket (conn_fd);
1028    }
1029  int  
1030  kserver_write_config( const char * fname, keyserver_cfgfile * cfg )  
1031  {  /* Extract the amount of keys from the info record. */
1032        static size_t
1033      return 0;  count_keys_in_response (char *buf)
1034  }  {
1035        char *p;
1036        int recno = 0;
1037  void      size_t n = 0;
1038  kserver_cfgfile_release( keyserver_cfgfile *cfg )  
1039  {            /* info:1:4 */
1040      keyserver_node *k, *k2;      if (strncmp (buf, "info", 4))
1041            return 0;
1042      proxy_release( &cfg->proxy );      p = strtok (buf, ":");
1043      for( k = cfg->list; cfg->nlist--; k = k2 ) {      while (p != NULL) {
1044          k2 = k->next;          recno++;
1045          free_if_alloc( k );              if (recno == 3)
1046      }              n = atoi (p);
1047      free_if_alloc( cfg );          p = strtok (NULL, ":");
1048  } /* kserver_cfgfile_release */      }
1049        return n;
1050    }
1051  void  
1052  proxy_release( keyserver_proxy_ctx *ctx )  
1053  {  /* Start the keyserver search.
1054      free_if_alloc( ctx->host );     Connect to host @hostname and port @port.
1055      free_if_alloc( ctx->pass );     The pattern are given in @pattern.
1056      free_if_alloc( ctx->user );     The socket is returned in @conn_fd and @nkeys contains
1057  } /* proxy_release */     the amount of keys which were found. */
1058    int
1059    kserver_search_begin (const char *hostname, WORD port,
1060  int                        const char *pattern, int *conn_fd, size_t *nkeys)
1061  ldap_recvkey (const char * host, const char * keyid, char * key, int maxkeylen)  {
1062  {  
1063      const char *s;      StringBuffer req;
1064      char *ksprg = NULL, *p = NULL;      const char *reqbuf;
1065      char temp[512], outf[512];      char *enc_patt = NULL;
1066      FILE * inp;      char status[128];
1067      int rc, start_key = 0;      int rc, sock_fd;
1068      STARTUPINFO si;      int nread;
1069      PROCESS_INFORMATION pi;      
1070        *conn_fd = 0;
1071      p = get_gnupg_path ();  
1072      ksprg = new char[strlen (p) + 1 + 128];      rc = kserver_connect (hostname, port, &sock_fd);
1073      if (!ksprg)      if (rc)
1074          BUG (0);          goto leave;
1075      strcpy (ksprg, p);  
1076      strcat (ksprg, "\\");      enc_patt = URL_encode (pattern, strlen (pattern), NULL);
1077      strcat (ksprg, "gpgkeys_ldap.exe");      if (proxy.host && proxy.user && proxy.proto == PROXY_PROTO_HTTP) {
1078      free_if_alloc (p);          req = req + "GET http://" + skip_type_prefix (hostname) + ":" + port +
1079      if (file_exist_check (ksprg)) {              "/pks/lookup?options=mr&op=index&search=" + enc_patt +
1080          log_box ( "LDAP Keyserver Plugin", MB_ERR, "Could not find LDAP keyserver module!");              " HTTP/1.0\r\n" +
1081          rc = -1;              "Host: " + skip_type_prefix (hostname)  + ":" + port+ "\r\n"+
1082          goto leave;              "Connection: close\r\n" +
1083      }              "Proxy-Authorization: Basic " + proxy.base64_user + "\r\n\r\n";
1084      GetTempPath (sizeof (temp)-1, temp);      }    
1085      strcpy (outf, temp);      else if (proxy.host && proxy.proto == PROXY_PROTO_HTTP) {
1086      strcat (outf, keyid);          req = req + "GET http://" + skip_type_prefix (hostname) + ":" + port +
1087      strcat (outf, ".out");              "/pks/lookup?options=mr&op=index&search=" + enc_patt +
1088      strcat (temp, keyid);              " HTTP/1.0\r\n"+
1089      inp = fopen (temp, "w+b");              "Host: " + skip_type_prefix (hostname)  + ":" + port+ "\r\n"+
1090      if( !inp ) {              "Connection: close\r\n"+
1091          log_box ("LDAP Keyserver Plugin", MB_ERR, "%s: %s", temp,              "\r\n";
1092                   winpt_strerror (WPTERR_FILE_OPEN));      }
1093          rc = -1;      else {
1094          goto leave;          req = req + "GET /pks/lookup?options=mr&op=index&search=" +
1095      }           enc_patt + " HTTP/1.0\r\n" +
1096      fprintf (inp,           "Host: " + skip_type_prefix (hostname)  + ":" + port+ "\r\n"+
1097          "VERSION 0\n"           "Connection: close\r\n"+
1098          "HOST %s\n"           "\r\n";
1099          "OPTION verbose\n"      }
1100          "COMMAND GET\n"      
1101          "\n"      log_debug ("kserver_search_begin:\r\n%s\r\n", req.getBuffer ());
1102          "%s\n", host? skip_type_prefix (host): "64.94.85.200", keyid);      reqbuf = req.getBuffer ();
1103      fclose (inp);      if (sock_write (sock_fd, reqbuf, strlen (reqbuf)) == SOCKET_ERROR) {
1104            rc = WPTERR_GENERAL;
1105      memset (&si, 0, sizeof (si));          goto leave;
1106      si.cb = sizeof (si);      }
1107      si.dwFlags = STARTF_USESHOWWINDOW;      
1108      si.wShowWindow = SW_HIDE;      rc = kserver_search_chkresp (sock_fd);
1109      memset (&pi, 0, sizeof (pi));      if (rc) {
1110      p = new char[strlen (ksprg) + strlen (temp) + strlen (outf) + 32];          closesocket (sock_fd);
1111      sprintf (p, "%s -o %s %s", ksprg, outf, temp);          sock_fd = 0;
1112      rc = CreateProcess (NULL, p, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);          goto leave;
1113      if (!rc) {      }
1114          log_box ("LDAP Keyserver Plugin", MB_ERR, "Could not spawn process");  
1115          rc = -1;      /* Skip all lines until we reach the "info:" record. */
1116          goto leave;      for (;;) {
1117      }          if (sock_getline (sock_fd, status, DIM (status)-1, &nread)) {  
1118      CloseHandle (pi.hThread);              log_debug ("kserver_search_begin: retrieving status line failed.\r\n");
1119      WaitForSingleObject (pi.hProcess, INFINITE);              closesocket (sock_fd);
1120      CloseHandle (pi.hProcess);              sock_fd = 0;
1121                rc = WPTERR_GENERAL;
1122      inp = fopen (outf, "rb");              break;
1123      if (!inp) {          }
1124          log_box ("LDAP Keyserver Plugin", MB_ERR, "%s: %s", outf,          if (!strncmp (status, "info:", 5))
1125                   winpt_strerror (WPTERR_FILE_OPEN));              break;
1126          rc = -1;      }
1127          goto leave;  
1128      }      if (!rc)
1129      memset (key, 0, maxkeylen);          *nkeys = count_keys_in_response (status);
1130      while( !feof( inp ) ) {      *conn_fd = sock_fd;
1131          s = fgets( temp, sizeof (temp)-1, inp );      
1132          if( !s )  leave:
1133              break;      free_if_alloc (enc_patt);
1134          if( !start_key && strstr( s, "KEY" ) && strstr( s, "BEGIN" ) ) {      return rc;
1135              start_key = 1;  }
1136              continue;  
1137          }        
1138          if( !start_key )  /* Parse a single pub record returned by the keyserver. */
1139              continue;  static void
1140          strcat( key, temp );  parse_pub_record (keyserver_key_s *key, char *buf)
1141          maxkeylen -= strlen( temp );  {
1142          if( maxkeylen < 0 || (strstr( s, "KEY" ) && strstr( s, "END" )) )                enum pub_rec_t {ID=1, KEYID, ALGO, SIZE, CREATE, EXPIRE};
1143              break;      char *p;
1144      }      int recno = 0;
1145      fclose( inp );          int off = 0;
1146    
1147  leave:      /* pub:{BF3DF9B4, ED4681C9BF3DF9B4, FPR}:17:1024:925411133:: */
1148      if( !strlen( key ) )      p = strtok (buf, ":");
1149          rc = WPTERR_WINSOCK_RECVKEY;      while (p != NULL) {
1150      free_if_alloc( p );          recno++;
1151      free_if_alloc( ksprg );          switch (recno) {
1152      return rc;          case ID:
1153  } /* ldap_recvkey */              break;
1154    
1155            case KEYID:
1156  static int              /* If for any reason the returned record actually contains
1157  finger_readline (int fd, char * buf, int nbytes)                 a fingerprint instead of a key ID, we truncate the fpr. */
1158  {              off = strlen (p) == 40? 32 : 0;
1159      char c = 0;              free_if_alloc (key->keyid);
1160      int n, pos = 0;              key->keyid = m_strdup (p+off);
1161                    break;
1162      while (nbytes > 0) {  
1163          n = recv (fd, &c, 1, 0);          case ALGO:
1164          if (n <= 0)              key->algo = atoi (p);
1165              break;              break;
1166          if (c == '\n')              
1167              break;          case SIZE:
1168          buf[pos++] = c;              key->bits = atoi (p);
1169          nbytes--;              break;
1170      }  
1171      if (nbytes > 0)          case CREATE:
1172          buf[pos++] = '\0';              key->creation = strtoul (p, NULL, 10);
1173      if (n <= 0)              break;
1174          pos = n;  
1175      return pos;          case EXPIRE:
1176  }              key->expires = strtoul (p, NULL, 10);
1177                break;
1178            }
1179  int          p = strtok (NULL, ":");
1180  finger_recvkey (const char * host, const char * user, char * key, int maxkeylen)      }
1181  {  }
1182      struct hostent * hp;  
1183      struct sockaddr_in saddr;  
1184      char buf[128];  /* Parse a single user id returned by the keyserver. */
1185      int fd, nread;  static void
1186      int start_key = 0;  parse_uid_record (keyserver_key_s *key, char *buf)
1187      int rc=0;  {
1188        enum uid_rec_t {ID=1, UID, CREATE, EXPIRE};
1189      fd = socket (PF_INET, SOCK_STREAM, 0);      keyserver_uid_s *u, *n;
1190      if (fd == -1)      char *p, *raw;
1191          return WPTERR_WINSOCK_SOCKET;      int recno = 0;
1192      hp = gethostbyname (skip_type_prefix (host));  
1193      if (!hp) {      /* uid:Timo Schulz <[email protected]>:1138440360:: */
1194          closesocket (fd);      u = new keyserver_uid_s;
1195          return WPTERR_WINSOCK_RESOLVE;      memset (u, 0, sizeof *u);
1196      }  
1197        p = strtok (buf, ":");
1198      memset (&saddr, 0, sizeof (saddr));      while (p != NULL) {
1199      saddr.sin_family = AF_INET;          recno++;
1200      saddr.sin_port = htons (FINGER_PORT);  
1201      saddr.sin_addr = *(struct in_addr *)hp->h_addr;          switch (recno) {
1202      if (connect (fd, (struct sockaddr *)&saddr, sizeof (saddr))) {          case ID:
1203          closesocket (fd);              break;
1204          return WPTERR_WINSOCK_CONNECT;  
1205      }          case UID:
1206      send (fd, user, strlen (user), 0);              unhexify_buffer (p, &raw);
1207      send (fd, "\r\n", 2, 0);              u->uid = utf8_to_native (raw);
1208                free_if_alloc (raw);
1209      memset (key, 0, maxkeylen);              break;
1210      while (maxkeylen > 0) {  
1211          nread = finger_readline (fd, buf, sizeof (buf)-1);          case CREATE:
1212          if (nread <= 0)              u->creation = strtoul (p, NULL, 10);
1213              break;              break;
1214          strcat (buf, "\n");  
1215          if (strstr (buf, "BEGIN PGP PUBLIC KEY BLOCK")) {          case EXPIRE:
1216              strcat (key, buf);              u->expires = strtoul (p, NULL, 10);
1217              start_key = 1;              break;
1218              maxkeylen -= nread;          }
1219          }  
1220          else if (strstr (buf, "END PGP PUBLIC KEY BLOCK" ) && start_key) {          p = strtok (NULL, ":");
1221              strcat (key, buf);      }
1222              start_key--;      if (!key->uids)
1223              maxkeylen -= nread;          key->uids = u;
1224              break;      else {
1225          }          for (n = key->uids; n->next; n=n->next)
1226          else if (start_key) {              ;
1227              strcat (key, buf);          n->next = u;
1228              maxkeylen -= nread;      }
1229          }  }
1230      }  
1231      closesocket (fd);  
1232      if (start_key != 0)  /* Peek the next 3 bytes to check if the next line
1233          rc = WPTERR_WINSOCK_RECVKEY;     would be a new "pub" record. In this case, return
1234      return rc;     -1 as an EOF indication, 0 otherwise. */
1235  }  static int
1236    is_key_eof (int fd)
1237    {
1238        char buf[64];
1239        int n;
1240    
1241        n = recv (fd, buf, 3, MSG_PEEK);
1242        if (n < 3 || strncmp (buf, "pub", 3))
1243            return 0;
1244        return -1;
1245    }
1246    
1247    
1248    /* Return the next key from the search response. */
1249    int
1250    kserver_search_next (int fd, keyserver_key_s **r_key)
1251    {
1252        keyserver_uid_s *uid, *u = NULL;
1253        keyserver_key_s *key;
1254        char buf[512];
1255        int n = 0;
1256        long max = 0;
1257    
1258        log_debug ("keyserver_search_next:\r\n");
1259        *r_key = NULL;
1260    
1261        key = new keyserver_key_s;
1262        memset (key, 0, sizeof *key);
1263        for (;;) {
1264            if (sock_getline (fd, buf, DIM (buf)-1, &n))
1265                break;
1266            /*log_debug ("record: '%s'\r\n", buf); */
1267            if (!strncmp (buf, "pub", 3))
1268                parse_pub_record (key, buf);
1269            else
1270                parse_uid_record (key, buf);
1271            if (is_key_eof (fd))
1272                break;
1273        }
1274    
1275        /* the uid with the newest self sig is used as the
1276           primary user id. */
1277        for (uid = key->uids; uid; uid = uid->next) {
1278            if (uid->creation > max) {
1279                max = uid->creation;
1280                u = uid;
1281            }
1282        }
1283    
1284        key->main_uid = u? u : key->uids;
1285        *r_key = key;
1286        return 0;
1287    }
1288    
1289    
1290    /* Release the keyserver key @key and all its elements. */
1291    void
1292    kserver_release_key (keyserver_key_s *key)
1293    {
1294        keyserver_uid_s *u;
1295    
1296        while (key->uids) {
1297            u = key->uids->next;
1298            free_if_alloc (key->uids->uid);
1299            free_if_alloc (key->uids);
1300            key->uids = u;
1301        }
1302        free_if_alloc (key->keyid);
1303        free_if_alloc (key);
1304    }
1305    
1306    
1307    /* Release mbmers in the proxy context @ctx. */
1308    void
1309    kserver_proxy_release (keyserver_proxy_t ctx)
1310    {
1311        free_if_alloc (ctx->host);
1312        free_if_alloc (ctx->pass);
1313        free_if_alloc (ctx->user);
1314        ctx->port = ctx->proto = 0;
1315    }
1316    
1317    
1318    /* Check if the given name @name is a valid inernet address
1319       which means an dotted IP or a valid DNS name.
1320       Return value: 0 on success. */
1321    int
1322    check_inet_address (const char *addr)
1323    {
1324        const char *not_allowed = "=!�$%&@#*~\\/}][{<>|,;:'";
1325    
1326        for (size_t i=0; i < strlen (addr); i++) {
1327            if (strchr (not_allowed, addr[i]))
1328                return -1;
1329        }
1330        return 0;
1331    }
1332    
1333    
1334    /* Split the URL @r_keyserver into the host and the port
1335       part if possible. */
1336    gpgme_error_t
1337    parse_keyserver_url (char **r_keyserver, unsigned short *r_port)
1338    {
1339        char *p;
1340        char *url = *r_keyserver;
1341        int off;
1342    
1343        /* no port is given so use the default port. */
1344        p = strrchr (url, ':');
1345        if (p == strchr (url, ':')) {
1346            *r_port = HKP_PORT;
1347            return 0;
1348        }
1349    
1350        if (url[(p-url)-1] == '/') /* remove / in .de/:11371 */
1351            off = 1;
1352        else
1353            off = 0;
1354    
1355        *r_keyserver = substr (url, 0, (p-url)-off);
1356        *r_port = atoi (url+(p-url)+1);
1357        free_if_alloc (url);
1358        return 0;
1359    }
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