mirror of
git://git.gnupg.org/gnupg.git
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46362cbc0e
* tools/call-dirmngr.c (wkd_get_policy_flags): New. * tools/gpg-wks.h (struct policy_flags_s, policy_flags_t): New. * tools/wks-util.c (wks_parse_policy): New. * tools/gpg-wks-client.c (command_send): Get the policy flags to show a new info line. * tools/gpg-wks-server.c (get_policy_flags): New. (process_new_key): get policy flag and add a stub for "auth-submit". (command_list_domains): Check policy flags. Signed-off-by: Werner Koch <wk@gnupg.org>
1831 lines
46 KiB
C
1831 lines
46 KiB
C
/* gpg-wks-server.c - A server for the Web Key Service protocols.
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* Copyright (C) 2016 Werner Koch
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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
|
||
* 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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/* The Web Key Service I-D defines an update protocol to store a
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* public key in the Web Key Directory. The current specification is
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* draft-koch-openpgp-webkey-service-01.txt.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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||
#include <unistd.h>
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#include <sys/types.h>
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||
#include <sys/stat.h>
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||
#include <dirent.h>
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||
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||
#include "util.h"
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#include "init.h"
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||
#include "sysutils.h"
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||
#include "ccparray.h"
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||
#include "exectool.h"
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||
#include "zb32.h"
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||
#include "mbox-util.h"
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||
#include "name-value.h"
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||
#include "mime-maker.h"
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||
#include "send-mail.h"
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||
#include "gpg-wks.h"
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||
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||
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||
/* The time we wait for a confirmation response. */
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||
#define PENDING_TTL (86400 * 3) /* 3 days. */
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||
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||
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||
/* Constants to identify the commands and options. */
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enum cmd_and_opt_values
|
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{
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||
aNull = 0,
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||
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||
oQuiet = 'q',
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||
oVerbose = 'v',
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||
oOutput = 'o',
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oDebug = 500,
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||
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||
aReceive,
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||
aCron,
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||
aListDomains,
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oGpgProgram,
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||
oSend,
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||
oFrom,
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||
oHeader,
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||
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||
oDummy
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||
};
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||
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||
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/* The list of commands and options. */
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static ARGPARSE_OPTS opts[] = {
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ARGPARSE_group (300, ("@Commands:\n ")),
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||
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||
ARGPARSE_c (aReceive, "receive",
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("receive a submission or confirmation")),
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ARGPARSE_c (aCron, "cron",
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("run regular jobs")),
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ARGPARSE_c (aListDomains, "list-domains",
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("list configured domains")),
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||
ARGPARSE_group (301, ("@\nOptions:\n ")),
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ARGPARSE_s_n (oVerbose, "verbose", ("verbose")),
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ARGPARSE_s_n (oQuiet, "quiet", ("be somewhat more quiet")),
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ARGPARSE_s_s (oDebug, "debug", "@"),
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ARGPARSE_s_s (oGpgProgram, "gpg", "@"),
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ARGPARSE_s_n (oSend, "send", "send the mail using sendmail"),
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ARGPARSE_s_s (oOutput, "output", "|FILE|write the mail to FILE"),
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ARGPARSE_s_s (oFrom, "from", "|ADDR|use ADDR as the default sender"),
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ARGPARSE_s_s (oHeader, "header" ,
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"|NAME=VALUE|add \"NAME: VALUE\" as header to all mails"),
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||
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ARGPARSE_end ()
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};
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|
||
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/* The list of supported debug flags. */
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static struct debug_flags_s debug_flags [] =
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{
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{ DBG_CRYPTO_VALUE , "crypto" },
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{ DBG_MEMORY_VALUE , "memory" },
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{ DBG_MEMSTAT_VALUE, "memstat" },
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{ DBG_IPC_VALUE , "ipc" },
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{ DBG_EXTPROG_VALUE, "extprog" },
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{ 0, NULL }
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};
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||
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||
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/* State for processing a message. */
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struct server_ctx_s
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{
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char *fpr;
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strlist_t mboxes; /* List of addr-specs taken from the UIDs. */
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};
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typedef struct server_ctx_s *server_ctx_t;
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/* Prototypes. */
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static gpg_error_t get_domain_list (strlist_t *r_list);
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static gpg_error_t command_receive_cb (void *opaque,
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const char *mediatype, estream_t fp);
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static gpg_error_t command_list_domains (void);
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static gpg_error_t command_cron (void);
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/* Print usage information and and provide strings for help. */
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static const char *
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my_strusage( int level )
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{
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const char *p;
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||
|
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switch (level)
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{
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case 11: p = "gpg-wks-server (@GNUPG@)";
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break;
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case 13: p = VERSION; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p = ("Please report bugs to <@EMAIL@>.\n"); break;
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|
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case 1:
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case 40:
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p = ("Usage: gpg-wks-server command [options] (-h for help)");
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break;
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case 41:
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p = ("Syntax: gpg-wks-server command [options]\n"
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"Server for the Web Key Service protocol\n");
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break;
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default: p = NULL; break;
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}
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return p;
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}
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static void
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wrong_args (const char *text)
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{
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es_fprintf (es_stderr, "usage: %s [options] %s\n", strusage (11), text);
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exit (2);
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}
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/* Command line parsing. */
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static enum cmd_and_opt_values
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parse_arguments (ARGPARSE_ARGS *pargs, ARGPARSE_OPTS *popts)
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{
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enum cmd_and_opt_values cmd = 0;
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int no_more_options = 0;
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while (!no_more_options && optfile_parse (NULL, NULL, NULL, pargs, popts))
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{
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switch (pargs->r_opt)
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{
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case oQuiet: opt.quiet = 1; break;
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case oVerbose: opt.verbose++; break;
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case oDebug:
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if (parse_debug_flag (pargs->r.ret_str, &opt.debug, debug_flags))
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{
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pargs->r_opt = ARGPARSE_INVALID_ARG;
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pargs->err = ARGPARSE_PRINT_ERROR;
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}
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break;
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case oGpgProgram:
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opt.gpg_program = pargs->r.ret_str;
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break;
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case oFrom:
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opt.default_from = pargs->r.ret_str;
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break;
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case oHeader:
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append_to_strlist (&opt.extra_headers, pargs->r.ret_str);
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break;
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case oSend:
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opt.use_sendmail = 1;
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break;
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case oOutput:
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opt.output = pargs->r.ret_str;
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break;
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case aReceive:
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case aCron:
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case aListDomains:
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cmd = pargs->r_opt;
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break;
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default: pargs->err = 2; break;
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}
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}
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return cmd;
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}
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/* gpg-wks-server main. */
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int
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main (int argc, char **argv)
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{
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gpg_error_t err;
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ARGPARSE_ARGS pargs;
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enum cmd_and_opt_values cmd;
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gnupg_reopen_std ("gpg-wks-server");
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set_strusage (my_strusage);
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log_set_prefix ("gpg-wks-server", GPGRT_LOG_WITH_PREFIX);
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/* Make sure that our subsystems are ready. */
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init_common_subsystems (&argc, &argv);
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/* Parse the command line. */
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags = ARGPARSE_FLAG_KEEP;
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cmd = parse_arguments (&pargs, opts);
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if (log_get_errorcount (0))
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exit (2);
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/* Print a warning if an argument looks like an option. */
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if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN))
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{
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int i;
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for (i=0; i < argc; i++)
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if (argv[i][0] == '-' && argv[i][1] == '-')
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log_info (("NOTE: '%s' is not considered an option\n"), argv[i]);
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}
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/* Set defaults for non given options. */
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if (!opt.gpg_program)
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opt.gpg_program = gnupg_module_name (GNUPG_MODULE_NAME_GPG);
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if (!opt.directory)
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opt.directory = "/var/lib/gnupg/wks";
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/* Check for syntax errors in the --header option to avoid later
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* error messages with a not easy to find cause */
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if (opt.extra_headers)
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{
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strlist_t sl;
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for (sl = opt.extra_headers; sl; sl = sl->next)
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{
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err = mime_maker_add_header (NULL, sl->d, NULL);
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if (err)
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log_error ("syntax error in \"--header %s\": %s\n",
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sl->d, gpg_strerror (err));
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}
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}
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if (log_get_errorcount (0))
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exit (2);
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||
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/* Check that we have a working directory. */
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#if defined(HAVE_STAT)
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{
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struct stat sb;
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||
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if (stat (opt.directory, &sb))
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{
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||
err = gpg_error_from_syserror ();
|
||
log_error ("error accessing directory '%s': %s\n",
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opt.directory, gpg_strerror (err));
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exit (2);
|
||
}
|
||
if (!S_ISDIR(sb.st_mode))
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{
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log_error ("error accessing directory '%s': %s\n",
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opt.directory, "not a directory");
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exit (2);
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}
|
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if (sb.st_uid != getuid())
|
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{
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log_error ("directory '%s' not owned by user\n", opt.directory);
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exit (2);
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}
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if ((sb.st_mode & (S_IROTH|S_IWOTH)))
|
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{
|
||
log_error ("directory '%s' has too relaxed permissions\n",
|
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opt.directory);
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exit (2);
|
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}
|
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}
|
||
#else /*!HAVE_STAT*/
|
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log_fatal ("program build w/o stat() call\n");
|
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#endif /*!HAVE_STAT*/
|
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|
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/* Run the selected command. */
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switch (cmd)
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{
|
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case aReceive:
|
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if (argc)
|
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wrong_args ("--receive");
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err = wks_receive (es_stdin, command_receive_cb, NULL);
|
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break;
|
||
|
||
case aCron:
|
||
if (argc)
|
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wrong_args ("--cron");
|
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err = command_cron ();
|
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break;
|
||
|
||
case aListDomains:
|
||
err = command_list_domains ();
|
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break;
|
||
|
||
default:
|
||
usage (1);
|
||
err = gpg_error (GPG_ERR_BUG);
|
||
break;
|
||
}
|
||
|
||
if (err)
|
||
log_error ("command failed: %s\n", gpg_strerror (err));
|
||
return log_get_errorcount (0)? 1:0;
|
||
}
|
||
|
||
|
||
|
||
static void
|
||
list_key_status_cb (void *opaque, const char *keyword, char *args)
|
||
{
|
||
server_ctx_t ctx = opaque;
|
||
(void)ctx;
|
||
if (opt.debug)
|
||
log_debug ("%s: %s\n", keyword, args);
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
list_key (server_ctx_t ctx, estream_t key)
|
||
{
|
||
gpg_error_t err;
|
||
ccparray_t ccp;
|
||
const char **argv;
|
||
estream_t listing;
|
||
char *line = NULL;
|
||
size_t length_of_line = 0;
|
||
size_t maxlen;
|
||
ssize_t len;
|
||
char **fields = NULL;
|
||
int nfields;
|
||
int lnr;
|
||
char *mbox = NULL;
|
||
|
||
/* We store our results in the context - clear it first. */
|
||
xfree (ctx->fpr);
|
||
ctx->fpr = NULL;
|
||
free_strlist (ctx->mboxes);
|
||
ctx->mboxes = NULL;
|
||
|
||
/* Open a memory stream. */
|
||
listing = es_fopenmem (0, "w+b");
|
||
if (!listing)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
ccparray_init (&ccp, 0);
|
||
|
||
ccparray_put (&ccp, "--no-options");
|
||
if (!opt.verbose)
|
||
ccparray_put (&ccp, "--quiet");
|
||
else if (opt.verbose > 1)
|
||
ccparray_put (&ccp, "--verbose");
|
||
ccparray_put (&ccp, "--batch");
|
||
ccparray_put (&ccp, "--status-fd=2");
|
||
ccparray_put (&ccp, "--always-trust");
|
||
ccparray_put (&ccp, "--with-colons");
|
||
ccparray_put (&ccp, "--dry-run");
|
||
ccparray_put (&ccp, "--import-options=import-minimal,import-show");
|
||
ccparray_put (&ccp, "--import");
|
||
|
||
ccparray_put (&ccp, NULL);
|
||
argv = ccparray_get (&ccp, NULL);
|
||
if (!argv)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = gnupg_exec_tool_stream (opt.gpg_program, argv, key,
|
||
NULL, listing,
|
||
list_key_status_cb, ctx);
|
||
if (err)
|
||
{
|
||
log_error ("import failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
es_rewind (listing);
|
||
lnr = 0;
|
||
maxlen = 2048; /* Set limit. */
|
||
while ((len = es_read_line (listing, &line, &length_of_line, &maxlen)) > 0)
|
||
{
|
||
lnr++;
|
||
if (!maxlen)
|
||
{
|
||
log_error ("received line too long\n");
|
||
err = gpg_error (GPG_ERR_LINE_TOO_LONG);
|
||
goto leave;
|
||
}
|
||
/* Strip newline and carriage return, if present. */
|
||
while (len > 0
|
||
&& (line[len - 1] == '\n' || line[len - 1] == '\r'))
|
||
line[--len] = '\0';
|
||
/* log_debug ("line '%s'\n", line); */
|
||
|
||
xfree (fields);
|
||
fields = strtokenize (line, ":");
|
||
if (!fields)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("strtokenize failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
for (nfields = 0; fields[nfields]; nfields++)
|
||
;
|
||
if (!nfields)
|
||
{
|
||
err = gpg_error (GPG_ERR_INV_ENGINE);
|
||
goto leave;
|
||
}
|
||
if (!strcmp (fields[0], "sec"))
|
||
{
|
||
/* gpg may return "sec" as the first record - but we do not
|
||
* accept secret keys. */
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
if (lnr == 1 && strcmp (fields[0], "pub"))
|
||
{
|
||
/* First record is not a public key. */
|
||
err = gpg_error (GPG_ERR_INV_ENGINE);
|
||
goto leave;
|
||
}
|
||
if (lnr > 1 && !strcmp (fields[0], "pub"))
|
||
{
|
||
/* More than one public key. */
|
||
err = gpg_error (GPG_ERR_TOO_MANY);
|
||
goto leave;
|
||
}
|
||
if (!strcmp (fields[0], "sub") || !strcmp (fields[0], "ssb"))
|
||
break; /* We can stop parsing here. */
|
||
|
||
if (!strcmp (fields[0], "fpr") && nfields > 9 && !ctx->fpr)
|
||
{
|
||
ctx->fpr = xtrystrdup (fields[9]);
|
||
if (!ctx->fpr)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
}
|
||
else if (!strcmp (fields[0], "uid") && nfields > 9)
|
||
{
|
||
/* Fixme: Unescape fields[9] */
|
||
xfree (mbox);
|
||
mbox = mailbox_from_userid (fields[9]);
|
||
if (mbox && !append_to_strlist_try (&ctx->mboxes, mbox))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
}
|
||
}
|
||
if (len < 0 || es_ferror (listing))
|
||
log_error ("error reading memory stream\n");
|
||
|
||
leave:
|
||
xfree (mbox);
|
||
xfree (fields);
|
||
es_free (line);
|
||
xfree (argv);
|
||
es_fclose (listing);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Take the key in KEYFILE and write it to OUTFILE in binary encoding.
|
||
* If ADDRSPEC is given only matching user IDs are included in the
|
||
* output. */
|
||
static gpg_error_t
|
||
copy_key_as_binary (const char *keyfile, const char *outfile,
|
||
const char *addrspec)
|
||
{
|
||
gpg_error_t err;
|
||
ccparray_t ccp;
|
||
const char **argv;
|
||
char *filterexp = NULL;
|
||
|
||
if (addrspec)
|
||
{
|
||
filterexp = es_bsprintf ("keep-uid=mbox = %s", addrspec);
|
||
if (!filterexp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n",
|
||
gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
ccparray_init (&ccp, 0);
|
||
|
||
ccparray_put (&ccp, "--no-options");
|
||
if (!opt.verbose)
|
||
ccparray_put (&ccp, "--quiet");
|
||
else if (opt.verbose > 1)
|
||
ccparray_put (&ccp, "--verbose");
|
||
ccparray_put (&ccp, "--batch");
|
||
ccparray_put (&ccp, "--yes");
|
||
ccparray_put (&ccp, "--always-trust");
|
||
ccparray_put (&ccp, "--no-keyring");
|
||
ccparray_put (&ccp, "--output");
|
||
ccparray_put (&ccp, outfile);
|
||
ccparray_put (&ccp, "--import-options=import-export");
|
||
if (filterexp)
|
||
{
|
||
ccparray_put (&ccp, "--import-filter");
|
||
ccparray_put (&ccp, filterexp);
|
||
}
|
||
ccparray_put (&ccp, "--import");
|
||
ccparray_put (&ccp, "--");
|
||
ccparray_put (&ccp, keyfile);
|
||
|
||
ccparray_put (&ccp, NULL);
|
||
argv = ccparray_get (&ccp, NULL);
|
||
if (!argv)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = gnupg_exec_tool_stream (opt.gpg_program, argv, NULL,
|
||
NULL, NULL, NULL, NULL);
|
||
if (err)
|
||
{
|
||
log_error ("%s failed: %s\n", __func__, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
xfree (filterexp);
|
||
xfree (argv);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Take the key in KEYFILE and write it to DANEFILE using the DANE
|
||
* output format. */
|
||
static gpg_error_t
|
||
copy_key_as_dane (const char *keyfile, const char *danefile)
|
||
{
|
||
gpg_error_t err;
|
||
ccparray_t ccp;
|
||
const char **argv;
|
||
|
||
ccparray_init (&ccp, 0);
|
||
|
||
ccparray_put (&ccp, "--no-options");
|
||
if (!opt.verbose)
|
||
ccparray_put (&ccp, "--quiet");
|
||
else if (opt.verbose > 1)
|
||
ccparray_put (&ccp, "--verbose");
|
||
ccparray_put (&ccp, "--batch");
|
||
ccparray_put (&ccp, "--yes");
|
||
ccparray_put (&ccp, "--always-trust");
|
||
ccparray_put (&ccp, "--no-keyring");
|
||
ccparray_put (&ccp, "--output");
|
||
ccparray_put (&ccp, danefile);
|
||
ccparray_put (&ccp, "--export-options=export-dane");
|
||
ccparray_put (&ccp, "--import-options=import-export");
|
||
ccparray_put (&ccp, "--import");
|
||
ccparray_put (&ccp, "--");
|
||
ccparray_put (&ccp, keyfile);
|
||
|
||
ccparray_put (&ccp, NULL);
|
||
argv = ccparray_get (&ccp, NULL);
|
||
if (!argv)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = gnupg_exec_tool_stream (opt.gpg_program, argv, NULL,
|
||
NULL, NULL, NULL, NULL);
|
||
if (err)
|
||
{
|
||
log_error ("%s failed: %s\n", __func__, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
xfree (argv);
|
||
return err;
|
||
}
|
||
|
||
|
||
static void
|
||
encrypt_stream_status_cb (void *opaque, const char *keyword, char *args)
|
||
{
|
||
(void)opaque;
|
||
|
||
if (opt.debug)
|
||
log_debug ("%s: %s\n", keyword, args);
|
||
}
|
||
|
||
|
||
/* Encrypt the INPUT stream to a new stream which is stored at success
|
||
* at R_OUTPUT. Encryption is done for the key in file KEYFIL. */
|
||
static gpg_error_t
|
||
encrypt_stream (estream_t *r_output, estream_t input, const char *keyfile)
|
||
{
|
||
gpg_error_t err;
|
||
ccparray_t ccp;
|
||
const char **argv;
|
||
estream_t output;
|
||
|
||
*r_output = NULL;
|
||
|
||
output = es_fopenmem (0, "w+b");
|
||
if (!output)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
ccparray_init (&ccp, 0);
|
||
|
||
ccparray_put (&ccp, "--no-options");
|
||
if (!opt.verbose)
|
||
ccparray_put (&ccp, "--quiet");
|
||
else if (opt.verbose > 1)
|
||
ccparray_put (&ccp, "--verbose");
|
||
ccparray_put (&ccp, "--batch");
|
||
ccparray_put (&ccp, "--status-fd=2");
|
||
ccparray_put (&ccp, "--always-trust");
|
||
ccparray_put (&ccp, "--no-keyring");
|
||
ccparray_put (&ccp, "--armor");
|
||
ccparray_put (&ccp, "--recipient-file");
|
||
ccparray_put (&ccp, keyfile);
|
||
ccparray_put (&ccp, "--encrypt");
|
||
ccparray_put (&ccp, "--");
|
||
|
||
ccparray_put (&ccp, NULL);
|
||
argv = ccparray_get (&ccp, NULL);
|
||
if (!argv)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = gnupg_exec_tool_stream (opt.gpg_program, argv, input,
|
||
NULL, output,
|
||
encrypt_stream_status_cb, NULL);
|
||
if (err)
|
||
{
|
||
log_error ("encryption failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
es_rewind (output);
|
||
*r_output = output;
|
||
output = NULL;
|
||
|
||
leave:
|
||
es_fclose (output);
|
||
xfree (argv);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Get the submission address for address MBOX. Caller must free the
|
||
* value. If no address can be found NULL is returned. */
|
||
static char *
|
||
get_submission_address (const char *mbox)
|
||
{
|
||
gpg_error_t err;
|
||
const char *domain;
|
||
char *fname, *line, *p;
|
||
size_t n;
|
||
estream_t fp;
|
||
|
||
domain = strchr (mbox, '@');
|
||
if (!domain)
|
||
return NULL;
|
||
domain++;
|
||
|
||
fname = make_filename_try (opt.directory, domain, "submission-address", NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("make_filename failed in %s: %s\n",
|
||
__func__, gpg_strerror (err));
|
||
return NULL;
|
||
}
|
||
|
||
fp = es_fopen (fname, "r");
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
log_info ("Note: no specific submission address configured"
|
||
" for domain '%s'\n", domain);
|
||
else
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
xfree (fname);
|
||
return NULL;
|
||
}
|
||
|
||
line = NULL;
|
||
n = 0;
|
||
if (es_getline (&line, &n, fp) < 0)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
xfree (line);
|
||
es_fclose (fp);
|
||
xfree (fname);
|
||
return NULL;
|
||
}
|
||
es_fclose (fp);
|
||
xfree (fname);
|
||
|
||
p = strchr (line, '\n');
|
||
if (p)
|
||
*p = 0;
|
||
trim_spaces (line);
|
||
if (!is_valid_mailbox (line))
|
||
{
|
||
log_error ("invalid submission address for domain '%s' detected\n",
|
||
domain);
|
||
xfree (line);
|
||
return NULL;
|
||
}
|
||
|
||
return line;
|
||
}
|
||
|
||
|
||
/* Get the policy flags for address MBOX and store them in POLICY. */
|
||
static gpg_error_t
|
||
get_policy_flags (policy_flags_t policy, const char *mbox)
|
||
{
|
||
gpg_error_t err;
|
||
const char *domain;
|
||
char *fname;
|
||
estream_t fp;
|
||
|
||
memset (policy, 0, sizeof *policy);
|
||
|
||
domain = strchr (mbox, '@');
|
||
if (!domain)
|
||
return gpg_error (GPG_ERR_INV_USER_ID);
|
||
domain++;
|
||
|
||
fname = make_filename_try (opt.directory, domain, "policy", NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("make_filename failed in %s: %s\n",
|
||
__func__, gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
fp = es_fopen (fname, "r");
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
err = 0;
|
||
else
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
xfree (fname);
|
||
return err;
|
||
}
|
||
|
||
err = wks_parse_policy (policy, fp, 0);
|
||
es_fclose (fp);
|
||
xfree (fname);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* We store the key under the name of the nonce we will then send to
|
||
* the user. On success the nonce is stored at R_NONCE and the file
|
||
* name at R_FNAME. */
|
||
static gpg_error_t
|
||
store_key_as_pending (const char *dir, estream_t key,
|
||
char **r_nonce, char **r_fname)
|
||
{
|
||
gpg_error_t err;
|
||
char *dname = NULL;
|
||
char *fname = NULL;
|
||
char *nonce = NULL;
|
||
estream_t outfp = NULL;
|
||
char buffer[1024];
|
||
size_t nbytes, nwritten;
|
||
|
||
*r_nonce = NULL;
|
||
*r_fname = NULL;
|
||
|
||
dname = make_filename_try (dir, "pending", NULL);
|
||
if (!dname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
/* Create the nonce. We use 20 bytes so that we don't waste a
|
||
* character in our zBase-32 encoding. Using the gcrypt's nonce
|
||
* function is faster than using the strong random function; this is
|
||
* Good Enough for our purpose. */
|
||
log_assert (sizeof buffer > 20);
|
||
gcry_create_nonce (buffer, 20);
|
||
nonce = zb32_encode (buffer, 8 * 20);
|
||
memset (buffer, 0, 20); /* Not actually needed but it does not harm. */
|
||
if (!nonce)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
fname = strconcat (dname, "/", nonce, NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
/* With 128 bits of random we can expect that no other file exists
|
||
* under this name. We use "x" to detect internal errors. */
|
||
outfp = es_fopen (fname, "wbx,mode=-rw");
|
||
if (!outfp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error creating '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
es_rewind (key);
|
||
for (;;)
|
||
{
|
||
if (es_read (key, buffer, sizeof buffer, &nbytes))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error reading '%s': %s\n",
|
||
es_fname_get (key), gpg_strerror (err));
|
||
break;
|
||
}
|
||
|
||
if (!nbytes)
|
||
{
|
||
err = 0;
|
||
goto leave; /* Ready. */
|
||
}
|
||
if (es_write (outfp, buffer, nbytes, &nwritten))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error writing '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
else if (nwritten != nbytes)
|
||
{
|
||
err = gpg_error (GPG_ERR_EIO);
|
||
log_error ("error writing '%s': %s\n", fname, "short write");
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
leave:
|
||
if (err)
|
||
{
|
||
es_fclose (outfp);
|
||
gnupg_remove (fname);
|
||
}
|
||
else if (es_fclose (outfp))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error closing '%s': %s\n", fname, gpg_strerror (err));
|
||
}
|
||
|
||
if (!err)
|
||
{
|
||
*r_nonce = nonce;
|
||
*r_fname = fname;
|
||
}
|
||
else
|
||
{
|
||
xfree (nonce);
|
||
xfree (fname);
|
||
}
|
||
xfree (dname);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Send a confirmation request. DIR is the directory used for the
|
||
* address MBOX. NONCE is the nonce we want to see in the response to
|
||
* this mail. FNAME the name of the file with the key. */
|
||
static gpg_error_t
|
||
send_confirmation_request (server_ctx_t ctx,
|
||
const char *mbox, const char *nonce,
|
||
const char *keyfile)
|
||
{
|
||
gpg_error_t err;
|
||
estream_t body = NULL;
|
||
estream_t bodyenc = NULL;
|
||
mime_maker_t mime = NULL;
|
||
char *from_buffer = NULL;
|
||
const char *from;
|
||
strlist_t sl;
|
||
|
||
from = from_buffer = get_submission_address (mbox);
|
||
if (!from)
|
||
{
|
||
from = opt.default_from;
|
||
if (!from)
|
||
{
|
||
log_error ("no sender address found for '%s'\n", mbox);
|
||
err = gpg_error (GPG_ERR_CONFIGURATION);
|
||
goto leave;
|
||
}
|
||
log_info ("Note: using default sender address '%s'\n", from);
|
||
}
|
||
|
||
body = es_fopenmem (0, "w+b");
|
||
if (!body)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
/* It is fine to use 8 bit encoding because that is encrypted and
|
||
* only our client will see it. */
|
||
es_fputs ("Content-Type: application/vnd.gnupg.wks\n"
|
||
"Content-Transfer-Encoding: 8bit\n"
|
||
"\n",
|
||
body);
|
||
|
||
es_fprintf (body, ("type: confirmation-request\n"
|
||
"sender: %s\n"
|
||
"address: %s\n"
|
||
"fingerprint: %s\n"
|
||
"nonce: %s\n"),
|
||
from,
|
||
mbox,
|
||
ctx->fpr,
|
||
nonce);
|
||
|
||
es_rewind (body);
|
||
err = encrypt_stream (&bodyenc, body, keyfile);
|
||
if (err)
|
||
goto leave;
|
||
es_fclose (body);
|
||
body = NULL;
|
||
|
||
|
||
err = mime_maker_new (&mime, NULL);
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "From", from);
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "To", mbox);
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "Subject", "Confirm your key publication");
|
||
if (err)
|
||
goto leave;
|
||
for (sl = opt.extra_headers; sl; sl = sl->next)
|
||
{
|
||
err = mime_maker_add_header (mime, sl->d, NULL);
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
|
||
err = mime_maker_add_header (mime, "Content-Type",
|
||
"multipart/encrypted; "
|
||
"protocol=\"application/pgp-encrypted\"");
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_container (mime, "multipart/encrypted");
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = mime_maker_add_header (mime, "Content-Type",
|
||
"application/pgp-encrypted");
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_body (mime, "Version: 1\n");
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "Content-Type",
|
||
"application/octet-stream");
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = mime_maker_add_stream (mime, &bodyenc);
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = wks_send_mime (mime);
|
||
|
||
leave:
|
||
mime_maker_release (mime);
|
||
es_fclose (bodyenc);
|
||
es_fclose (body);
|
||
xfree (from_buffer);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Store the key given by KEY into the pending directory and send a
|
||
* confirmation requests. */
|
||
static gpg_error_t
|
||
process_new_key (server_ctx_t ctx, estream_t key)
|
||
{
|
||
gpg_error_t err;
|
||
strlist_t sl;
|
||
const char *s;
|
||
char *dname = NULL;
|
||
char *nonce = NULL;
|
||
char *fname = NULL;
|
||
struct policy_flags_s policybuf;
|
||
|
||
/* First figure out the user id from the key. */
|
||
err = list_key (ctx, key);
|
||
if (err)
|
||
goto leave;
|
||
if (!ctx->fpr)
|
||
{
|
||
log_error ("error parsing key (no fingerprint)\n");
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
log_info ("fingerprint: %s\n", ctx->fpr);
|
||
for (sl = ctx->mboxes; sl; sl = sl->next)
|
||
{
|
||
log_info (" addr-spec: %s\n", sl->d);
|
||
}
|
||
|
||
/* Walk over all user ids and send confirmation requests for those
|
||
* we support. */
|
||
for (sl = ctx->mboxes; sl; sl = sl->next)
|
||
{
|
||
s = strchr (sl->d, '@');
|
||
log_assert (s && s[1]);
|
||
xfree (dname);
|
||
dname = make_filename_try (opt.directory, s+1, NULL);
|
||
if (!dname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
if (access (dname, W_OK))
|
||
{
|
||
log_info ("skipping address '%s': Domain not configured\n", sl->d);
|
||
continue;
|
||
}
|
||
if (get_policy_flags (&policybuf, sl->d))
|
||
{
|
||
log_info ("skipping address '%s': Bad policy flags\n", sl->d);
|
||
continue;
|
||
}
|
||
|
||
if (policybuf.auth_submit)
|
||
{
|
||
/* Bypass the confirmation stuff and publish the the key as is. */
|
||
log_info ("publishing address '%s'\n", sl->d);
|
||
/* FIXME: We need to make sure that we do this only for the
|
||
* address in the mail. */
|
||
log_debug ("auth-submit not yet working!\n");
|
||
}
|
||
else
|
||
{
|
||
log_info ("storing address '%s'\n", sl->d);
|
||
|
||
xfree (nonce);
|
||
xfree (fname);
|
||
err = store_key_as_pending (dname, key, &nonce, &fname);
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = send_confirmation_request (ctx, sl->d, nonce, fname);
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
leave:
|
||
if (nonce)
|
||
wipememory (nonce, strlen (nonce));
|
||
xfree (nonce);
|
||
xfree (fname);
|
||
xfree (dname);
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Send a message to tell the user at MBOX that their key has been
|
||
* published. FNAME the name of the file with the key. */
|
||
static gpg_error_t
|
||
send_congratulation_message (const char *mbox, const char *keyfile)
|
||
{
|
||
gpg_error_t err;
|
||
estream_t body = NULL;
|
||
estream_t bodyenc = NULL;
|
||
mime_maker_t mime = NULL;
|
||
char *from_buffer = NULL;
|
||
const char *from;
|
||
strlist_t sl;
|
||
|
||
from = from_buffer = get_submission_address (mbox);
|
||
if (!from)
|
||
{
|
||
from = opt.default_from;
|
||
if (!from)
|
||
{
|
||
log_error ("no sender address found for '%s'\n", mbox);
|
||
err = gpg_error (GPG_ERR_CONFIGURATION);
|
||
goto leave;
|
||
}
|
||
log_info ("Note: using default sender address '%s'\n", from);
|
||
}
|
||
|
||
body = es_fopenmem (0, "w+b");
|
||
if (!body)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
/* It is fine to use 8 bit encoding because that is encrypted and
|
||
* only our client will see it. */
|
||
es_fputs ("Content-Type: text/plain; charset=utf-8\n"
|
||
"Content-Transfer-Encoding: 8bit\n"
|
||
"\n",
|
||
body);
|
||
|
||
es_fprintf (body,
|
||
"Hello!\n\n"
|
||
"The key for your address '%s' has been published\n"
|
||
"and can now be retrieved from the Web Key Directory.\n"
|
||
"\n"
|
||
"For more information on this system see:\n"
|
||
"\n"
|
||
" https://gnupg.org/faq/wkd.html\n"
|
||
"\n"
|
||
"Best regards\n"
|
||
"\n"
|
||
" Gnu Key Publisher\n\n\n"
|
||
"-- \n"
|
||
"The GnuPG Project welcomes donations: %s\n",
|
||
mbox, "https://gnupg.org/donate");
|
||
|
||
es_rewind (body);
|
||
err = encrypt_stream (&bodyenc, body, keyfile);
|
||
if (err)
|
||
goto leave;
|
||
es_fclose (body);
|
||
body = NULL;
|
||
|
||
err = mime_maker_new (&mime, NULL);
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "From", from);
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "To", mbox);
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "Subject", "Your key has been published");
|
||
if (err)
|
||
goto leave;
|
||
for (sl = opt.extra_headers; sl; sl = sl->next)
|
||
{
|
||
err = mime_maker_add_header (mime, sl->d, NULL);
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
|
||
err = mime_maker_add_header (mime, "Content-Type",
|
||
"multipart/encrypted; "
|
||
"protocol=\"application/pgp-encrypted\"");
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_container (mime, "multipart/encrypted");
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = mime_maker_add_header (mime, "Content-Type",
|
||
"application/pgp-encrypted");
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_body (mime, "Version: 1\n");
|
||
if (err)
|
||
goto leave;
|
||
err = mime_maker_add_header (mime, "Content-Type",
|
||
"application/octet-stream");
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = mime_maker_add_stream (mime, &bodyenc);
|
||
if (err)
|
||
goto leave;
|
||
|
||
err = wks_send_mime (mime);
|
||
|
||
leave:
|
||
mime_maker_release (mime);
|
||
es_fclose (bodyenc);
|
||
es_fclose (body);
|
||
xfree (from_buffer);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Check that we have send a request with NONCE and publish the key. */
|
||
static gpg_error_t
|
||
check_and_publish (server_ctx_t ctx, const char *address, const char *nonce)
|
||
{
|
||
gpg_error_t err;
|
||
char *fname = NULL;
|
||
char *fnewname = NULL;
|
||
estream_t key = NULL;
|
||
char *hash = NULL;
|
||
const char *domain;
|
||
const char *s;
|
||
strlist_t sl;
|
||
char shaxbuf[32]; /* Used for SHA-1 and SHA-256 */
|
||
|
||
/* FIXME: There is a bug in name-value.c which adds white space for
|
||
* the last pair and thus we strip the nonce here until this has
|
||
* been fixed. */
|
||
char *nonce2 = xstrdup (nonce);
|
||
trim_trailing_spaces (nonce2);
|
||
nonce = nonce2;
|
||
|
||
|
||
domain = strchr (address, '@');
|
||
log_assert (domain && domain[1]);
|
||
domain++;
|
||
fname = make_filename_try (opt.directory, domain, "pending", nonce, NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
/* Try to open the file with the key. */
|
||
key = es_fopen (fname, "rb");
|
||
if (!key)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
{
|
||
log_info ("no pending request for '%s'\n", address);
|
||
err = gpg_error (GPG_ERR_NOT_FOUND);
|
||
}
|
||
else
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
/* We need to get the fingerprint from the key. */
|
||
err = list_key (ctx, key);
|
||
if (err)
|
||
goto leave;
|
||
if (!ctx->fpr)
|
||
{
|
||
log_error ("error parsing key (no fingerprint)\n");
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
log_info ("fingerprint: %s\n", ctx->fpr);
|
||
for (sl = ctx->mboxes; sl; sl = sl->next)
|
||
log_info (" addr-spec: %s\n", sl->d);
|
||
|
||
/* Check that the key has 'address' as a user id. We use
|
||
* case-insensitive matching because the client is expected to
|
||
* return the address verbatim. */
|
||
for (sl = ctx->mboxes; sl; sl = sl->next)
|
||
if (!strcmp (sl->d, address))
|
||
break;
|
||
if (!sl)
|
||
{
|
||
log_error ("error publishing key: '%s' is not a user ID of %s\n",
|
||
address, ctx->fpr);
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
|
||
|
||
/* Hash user ID and create filename. */
|
||
s = strchr (address, '@');
|
||
log_assert (s);
|
||
gcry_md_hash_buffer (GCRY_MD_SHA1, shaxbuf, address, s - address);
|
||
hash = zb32_encode (shaxbuf, 8*20);
|
||
if (!hash)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
fnewname = make_filename_try (opt.directory, domain, "hu", hash, NULL);
|
||
if (!fnewname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
/* Publish. */
|
||
err = copy_key_as_binary (fname, fnewname, address);
|
||
if (err)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("copying '%s' to '%s' failed: %s\n",
|
||
fname, fnewname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
log_info ("key %s published for '%s'\n", ctx->fpr, address);
|
||
send_congratulation_message (address, fnewname);
|
||
|
||
/* Try to publish as DANE record if the DANE directory exists. */
|
||
xfree (fname);
|
||
fname = fnewname;
|
||
fnewname = make_filename_try (opt.directory, domain, "dane", NULL);
|
||
if (!fnewname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
if (!access (fnewname, W_OK))
|
||
{
|
||
/* Yes, we have a dane directory. */
|
||
s = strchr (address, '@');
|
||
log_assert (s);
|
||
gcry_md_hash_buffer (GCRY_MD_SHA256, shaxbuf, address, s - address);
|
||
xfree (hash);
|
||
hash = bin2hex (shaxbuf, 28, NULL);
|
||
if (!hash)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
xfree (fnewname);
|
||
fnewname = make_filename_try (opt.directory, domain, "dane", hash, NULL);
|
||
if (!fnewname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = copy_key_as_dane (fname, fnewname);
|
||
if (err)
|
||
goto leave;
|
||
log_info ("key %s published for '%s' (DANE record)\n", ctx->fpr, address);
|
||
}
|
||
|
||
leave:
|
||
es_fclose (key);
|
||
xfree (hash);
|
||
xfree (fnewname);
|
||
xfree (fname);
|
||
xfree (nonce2);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Process a confirmation response in MSG. */
|
||
static gpg_error_t
|
||
process_confirmation_response (server_ctx_t ctx, estream_t msg)
|
||
{
|
||
gpg_error_t err;
|
||
nvc_t nvc;
|
||
nve_t item;
|
||
const char *value, *sender, *address, *nonce;
|
||
|
||
err = nvc_parse (&nvc, NULL, msg);
|
||
if (err)
|
||
{
|
||
log_error ("parsing the WKS message failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
if (opt.debug)
|
||
{
|
||
log_debug ("response follows:\n");
|
||
nvc_write (nvc, log_get_stream ());
|
||
}
|
||
|
||
/* Check that this is a confirmation response. */
|
||
if (!((item = nvc_lookup (nvc, "type:")) && (value = nve_value (item))
|
||
&& !strcmp (value, "confirmation-response")))
|
||
{
|
||
if (item && value)
|
||
log_error ("received unexpected wks message '%s'\n", value);
|
||
else
|
||
log_error ("received invalid wks message: %s\n", "'type' missing");
|
||
err = gpg_error (GPG_ERR_UNEXPECTED_MSG);
|
||
goto leave;
|
||
}
|
||
|
||
/* Get the sender. */
|
||
if (!((item = nvc_lookup (nvc, "sender:")) && (value = nve_value (item))
|
||
&& is_valid_mailbox (value)))
|
||
{
|
||
log_error ("received invalid wks message: %s\n",
|
||
"'sender' missing or invalid");
|
||
err = gpg_error (GPG_ERR_INV_DATA);
|
||
goto leave;
|
||
}
|
||
sender = value;
|
||
(void)sender;
|
||
/* FIXME: Do we really need the sender?. */
|
||
|
||
/* Get the address. */
|
||
if (!((item = nvc_lookup (nvc, "address:")) && (value = nve_value (item))
|
||
&& is_valid_mailbox (value)))
|
||
{
|
||
log_error ("received invalid wks message: %s\n",
|
||
"'address' missing or invalid");
|
||
err = gpg_error (GPG_ERR_INV_DATA);
|
||
goto leave;
|
||
}
|
||
address = value;
|
||
|
||
/* Get the nonce. */
|
||
if (!((item = nvc_lookup (nvc, "nonce:")) && (value = nve_value (item))
|
||
&& strlen (value) > 16))
|
||
{
|
||
log_error ("received invalid wks message: %s\n",
|
||
"'nonce' missing or too short");
|
||
err = gpg_error (GPG_ERR_INV_DATA);
|
||
goto leave;
|
||
}
|
||
nonce = value;
|
||
|
||
err = check_and_publish (ctx, address, nonce);
|
||
|
||
|
||
leave:
|
||
nvc_release (nvc);
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Called from the MIME receiver to process the plain text data in MSG . */
|
||
static gpg_error_t
|
||
command_receive_cb (void *opaque, const char *mediatype, estream_t msg)
|
||
{
|
||
gpg_error_t err;
|
||
struct server_ctx_s ctx;
|
||
|
||
memset (&ctx, 0, sizeof ctx);
|
||
|
||
(void)opaque;
|
||
|
||
if (!strcmp (mediatype, "application/pgp-keys"))
|
||
err = process_new_key (&ctx, msg);
|
||
else if (!strcmp (mediatype, "application/vnd.gnupg.wks"))
|
||
err = process_confirmation_response (&ctx, msg);
|
||
else
|
||
{
|
||
log_info ("ignoring unexpected message of type '%s'\n", mediatype);
|
||
err = gpg_error (GPG_ERR_UNEXPECTED_MSG);
|
||
}
|
||
|
||
xfree (ctx.fpr);
|
||
free_strlist (ctx.mboxes);
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
/* Return a list of all configured domains. ECh list element is the
|
||
* top directory for for the domain. To figure out the actual domain
|
||
* name strrchr(name, '/') can be used. */
|
||
static gpg_error_t
|
||
get_domain_list (strlist_t *r_list)
|
||
{
|
||
gpg_error_t err;
|
||
DIR *dir = NULL;
|
||
char *fname = NULL;
|
||
struct dirent *dentry;
|
||
struct stat sb;
|
||
strlist_t list = NULL;
|
||
|
||
*r_list = NULL;
|
||
|
||
dir = opendir (opt.directory);
|
||
if (!dir)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
while ((dentry = readdir (dir)))
|
||
{
|
||
if (*dentry->d_name == '.')
|
||
continue;
|
||
if (!strchr (dentry->d_name, '.'))
|
||
continue; /* No dot - can't be a domain subdir. */
|
||
|
||
xfree (fname);
|
||
fname = make_filename_try (opt.directory, dentry->d_name, NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("make_filename failed in %s: %s\n",
|
||
__func__, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
if (stat (fname, &sb))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error accessing '%s': %s\n", fname, gpg_strerror (err));
|
||
continue;
|
||
}
|
||
if (!S_ISDIR(sb.st_mode))
|
||
continue;
|
||
|
||
if (!add_to_strlist_try (&list, fname))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("add_to_strlist failed in %s: %s\n",
|
||
__func__, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
}
|
||
err = 0;
|
||
*r_list = list;
|
||
list = NULL;
|
||
|
||
leave:
|
||
free_strlist (list);
|
||
if (dir)
|
||
closedir (dir);
|
||
xfree (fname);
|
||
return err;
|
||
}
|
||
|
||
|
||
|
||
static gpg_error_t
|
||
expire_one_domain (const char *top_dirname, const char *domain)
|
||
{
|
||
gpg_error_t err;
|
||
char *dirname;
|
||
char *fname = NULL;
|
||
DIR *dir = NULL;
|
||
struct dirent *dentry;
|
||
struct stat sb;
|
||
time_t now = gnupg_get_time ();
|
||
|
||
dirname = make_filename_try (top_dirname, "pending", NULL);
|
||
if (!dirname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("make_filename failed in %s: %s\n",
|
||
__func__, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
dir = opendir (dirname);
|
||
if (!dir)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error (("can't access directory '%s': %s\n"),
|
||
dirname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
while ((dentry = readdir (dir)))
|
||
{
|
||
if (*dentry->d_name == '.')
|
||
continue;
|
||
xfree (fname);
|
||
fname = make_filename_try (dirname, dentry->d_name, NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("make_filename failed in %s: %s\n",
|
||
__func__, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
if (strlen (dentry->d_name) != 32)
|
||
{
|
||
log_info ("garbage file '%s' ignored\n", fname);
|
||
continue;
|
||
}
|
||
if (stat (fname, &sb))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error accessing '%s': %s\n", fname, gpg_strerror (err));
|
||
continue;
|
||
}
|
||
if (S_ISDIR(sb.st_mode))
|
||
{
|
||
log_info ("garbage directory '%s' ignored\n", fname);
|
||
continue;
|
||
}
|
||
if (sb.st_mtime + PENDING_TTL < now)
|
||
{
|
||
if (opt.verbose)
|
||
log_info ("domain %s: removing pending key '%s'\n",
|
||
domain, dentry->d_name);
|
||
if (remove (fname))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
/* In case the file has just been renamed or another
|
||
* processes is cleaning up, we don't print a diagnostic
|
||
* for ENOENT. */
|
||
if (gpg_err_code (err) != GPG_ERR_ENOENT)
|
||
log_error ("error removing '%s': %s\n",
|
||
fname, gpg_strerror (err));
|
||
}
|
||
}
|
||
}
|
||
err = 0;
|
||
|
||
leave:
|
||
if (dir)
|
||
closedir (dir);
|
||
xfree (dirname);
|
||
xfree (fname);
|
||
return err;
|
||
|
||
}
|
||
|
||
|
||
/* Scan spool directories and expire too old pending keys. */
|
||
static gpg_error_t
|
||
expire_pending_confirmations (strlist_t domaindirs)
|
||
{
|
||
gpg_error_t err = 0;
|
||
strlist_t sl;
|
||
const char *domain;
|
||
|
||
for (sl = domaindirs; sl; sl = sl->next)
|
||
{
|
||
domain = strrchr (sl->d, '/');
|
||
log_assert (domain);
|
||
domain++;
|
||
|
||
expire_one_domain (sl->d, domain);
|
||
}
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
/* List all configured domains. */
|
||
static gpg_error_t
|
||
command_list_domains (void)
|
||
{
|
||
static struct {
|
||
const char *name;
|
||
const char *perm;
|
||
} requireddirs[] = {
|
||
{ "pending", "-rwx" },
|
||
{ "hu", "-rwxr-xr-x" }
|
||
};
|
||
|
||
gpg_error_t err;
|
||
strlist_t domaindirs;
|
||
strlist_t sl;
|
||
const char *domain;
|
||
char *fname = NULL;
|
||
int i;
|
||
estream_t fp;
|
||
|
||
err = get_domain_list (&domaindirs);
|
||
if (err)
|
||
{
|
||
log_error ("error reading list of domains: %s\n", gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
for (sl = domaindirs; sl; sl = sl->next)
|
||
{
|
||
domain = strrchr (sl->d, '/');
|
||
log_assert (domain);
|
||
domain++;
|
||
es_printf ("%s\n", domain);
|
||
|
||
/* Check that the required directories are there. */
|
||
for (i=0; i < DIM (requireddirs); i++)
|
||
{
|
||
xfree (fname);
|
||
fname = make_filename_try (sl->d, requireddirs[i].name, NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
if (access (fname, W_OK))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
{
|
||
if (gnupg_mkdir (fname, requireddirs[i].perm))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("domain %s: error creating subdir '%s': %s\n",
|
||
domain, requireddirs[i].name,
|
||
gpg_strerror (err));
|
||
}
|
||
else
|
||
log_info ("domain %s: subdir '%s' created\n",
|
||
domain, requireddirs[i].name);
|
||
}
|
||
else if (err)
|
||
log_error ("domain %s: problem with subdir '%s': %s\n",
|
||
domain, requireddirs[i].name, gpg_strerror (err));
|
||
}
|
||
}
|
||
|
||
/* Print a warning if the submission address is not configured. */
|
||
xfree (fname);
|
||
fname = make_filename_try (sl->d, "submission-address", NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
if (access (fname, F_OK))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
log_error ("domain %s: submission address not configured\n",
|
||
domain);
|
||
else
|
||
log_error ("domain %s: problem with '%s': %s\n",
|
||
domain, fname, gpg_strerror (err));
|
||
}
|
||
|
||
/* Check the syntax of the optional policy file. */
|
||
xfree (fname);
|
||
fname = make_filename_try (sl->d, "policy", NULL);
|
||
if (!fname)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
fp = es_fopen (fname, "r");
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) != GPG_ERR_ENOENT)
|
||
log_error ("domain %s: error in policy file: %s\n",
|
||
domain, gpg_strerror (err));
|
||
}
|
||
else
|
||
{
|
||
struct policy_flags_s policy;
|
||
err = wks_parse_policy (&policy, fp, 0);
|
||
es_fclose (fp);
|
||
if (!err)
|
||
{
|
||
struct policy_flags_s empty_policy;
|
||
memset (&empty_policy, 0, sizeof empty_policy);
|
||
if (!memcmp (&empty_policy, &policy, sizeof policy))
|
||
log_error ("domain %s: empty policy file\n", domain);
|
||
}
|
||
}
|
||
|
||
|
||
}
|
||
err = 0;
|
||
|
||
leave:
|
||
xfree (fname);
|
||
free_strlist (domaindirs);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Run regular maintenance jobs. */
|
||
static gpg_error_t
|
||
command_cron (void)
|
||
{
|
||
gpg_error_t err;
|
||
strlist_t domaindirs;
|
||
|
||
err = get_domain_list (&domaindirs);
|
||
if (err)
|
||
{
|
||
log_error ("error reading list of domains: %s\n", gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
err = expire_pending_confirmations (domaindirs);
|
||
|
||
free_strlist (domaindirs);
|
||
return err;
|
||
}
|