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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:14:06 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:14:06 +0000 |
commit | eee068778cb28ecf3c14e1bf843a95547d72c42d (patch) | |
tree | 0e07b30ddc5ea579d682d5dbe57998200d1c9ab7 /tools/gpg-wks-server.c | |
parent | Initial commit. (diff) | |
download | gnupg2-upstream.tar.xz gnupg2-upstream.zip |
Adding upstream version 2.2.40.upstream/2.2.40upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/gpg-wks-server.c')
-rw-r--r-- | tools/gpg-wks-server.c | 2058 |
1 files changed, 2058 insertions, 0 deletions
diff --git a/tools/gpg-wks-server.c b/tools/gpg-wks-server.c new file mode 100644 index 0000000..74bb551 --- /dev/null +++ b/tools/gpg-wks-server.c @@ -0,0 +1,2058 @@ +/* gpg-wks-server.c - A server for the Web Key Service protocols. + * Copyright (C) 2016, 2018 Werner Koch + * Copyright (C) 2016 Bundesamt für Sicherheit in der Informationstechnik + * + * This file is part of GnuPG. + * + * This file is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This file is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, see <https://www.gnu.org/licenses/>. + * SPDX-License-Identifier: LGPL-2.1-or-later + */ + +/* The Web Key Service I-D defines an update protocol to store a + * public key in the Web Key Directory. The current specification is + * draft-koch-openpgp-webkey-service-05.txt. + */ + +#include <config.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <dirent.h> + +#define INCLUDED_BY_MAIN_MODULE 1 +#include "../common/util.h" +#include "../common/init.h" +#include "../common/sysutils.h" +#include "../common/userids.h" +#include "../common/ccparray.h" +#include "../common/exectool.h" +#include "../common/zb32.h" +#include "../common/mbox-util.h" +#include "../common/name-value.h" +#include "mime-maker.h" +#include "send-mail.h" +#include "gpg-wks.h" + + +/* The time we wait for a confirmation response. */ +#define PENDING_TTL (86400 * 3) /* 3 days. */ + + +/* Constants to identify the commands and options. */ +enum cmd_and_opt_values + { + aNull = 0, + + oQuiet = 'q', + oVerbose = 'v', + oOutput = 'o', + oDirectory = 'C', + + oDebug = 500, + + aReceive, + aCron, + aListDomains, + aInstallKey, + aRevokeKey, + aRemoveKey, + aCheck, + + oGpgProgram, + oSend, + oFrom, + oHeader, + oWithDir, + oWithFile, + + oDummy + }; + + +/* The list of commands and options. */ +static ARGPARSE_OPTS opts[] = { + ARGPARSE_group (300, ("@Commands:\n ")), + + ARGPARSE_c (aReceive, "receive", + ("receive a submission or confirmation")), + ARGPARSE_c (aCron, "cron", + ("run regular jobs")), + ARGPARSE_c (aListDomains, "list-domains", + ("list configured domains")), + ARGPARSE_c (aCheck, "check", + ("check whether a key is installed")), + ARGPARSE_c (aCheck, "check-key", "@"), + ARGPARSE_c (aInstallKey, "install-key", + "install a key from FILE into the WKD"), + ARGPARSE_c (aRemoveKey, "remove-key", + "remove a key from the WKD"), + ARGPARSE_c (aRevokeKey, "revoke-key", + "mark a key as revoked"), + + ARGPARSE_group (301, ("@\nOptions:\n ")), + + ARGPARSE_s_n (oVerbose, "verbose", ("verbose")), + ARGPARSE_s_n (oQuiet, "quiet", ("be somewhat more quiet")), + ARGPARSE_s_s (oDebug, "debug", "@"), + ARGPARSE_s_s (oGpgProgram, "gpg", "@"), + ARGPARSE_s_n (oSend, "send", "send the mail using sendmail"), + ARGPARSE_s_s (oOutput, "output", "|FILE|write the mail to FILE"), + ARGPARSE_s_s (oDirectory, "directory", "|DIR|use DIR as top directory"), + ARGPARSE_s_s (oFrom, "from", "|ADDR|use ADDR as the default sender"), + ARGPARSE_s_s (oHeader, "header" , + "|NAME=VALUE|add \"NAME: VALUE\" as header to all mails"), + ARGPARSE_s_n (oWithDir, "with-dir", "@"), + ARGPARSE_s_n (oWithFile, "with-file", "@"), + + ARGPARSE_end () +}; + + +/* The list of supported debug flags. */ +static struct debug_flags_s debug_flags [] = + { + { DBG_MIME_VALUE , "mime" }, + { DBG_PARSER_VALUE , "parser" }, + { DBG_CRYPTO_VALUE , "crypto" }, + { DBG_MEMORY_VALUE , "memory" }, + { DBG_MEMSTAT_VALUE, "memstat" }, + { DBG_IPC_VALUE , "ipc" }, + { DBG_EXTPROG_VALUE, "extprog" }, + { 0, NULL } + }; + + +/* State for processing a message. */ +struct server_ctx_s +{ + char *fpr; + uidinfo_list_t mboxes; /* List with addr-specs taken from the UIDs. */ + unsigned int draft_version_2:1; /* Client supports the draft 2. */ +}; +typedef struct server_ctx_s *server_ctx_t; + + +/* Flag for --with-dir. */ +static int opt_with_dir; +/* Flag for --with-file. */ +static int opt_with_file; + + +/* Prototypes. */ +static gpg_error_t get_domain_list (strlist_t *r_list); + +static gpg_error_t command_receive_cb (void *opaque, + const char *mediatype, estream_t fp, + unsigned int flags); +static gpg_error_t command_list_domains (void); +static gpg_error_t command_revoke_key (const char *mailaddr); +static gpg_error_t command_check_key (const char *mailaddr); +static gpg_error_t command_cron (void); + + + +/* Print usage information and provide strings for help. */ +static const char * +my_strusage( int level ) +{ + const char *p; + + switch (level) + { + case 9: p = "LGPL-2.1-or-later"; break; + case 11: p = "gpg-wks-server"; break; + case 12: p = "@GNUPG@"; break; + case 13: p = VERSION; break; + case 14: p = GNUPG_DEF_COPYRIGHT_LINE; break; + case 17: p = PRINTABLE_OS_NAME; break; + case 19: p = ("Please report bugs to <@EMAIL@>.\n"); break; + + case 1: + case 40: + p = ("Usage: gpg-wks-server command [options] (-h for help)"); + break; + case 41: + p = ("Syntax: gpg-wks-server command [options]\n" + "Server for the Web Key Service protocol\n"); + break; + + default: p = NULL; break; + } + return p; +} + + +static void +wrong_args (const char *text) +{ + es_fprintf (es_stderr, "usage: %s [options] %s\n", strusage (11), text); + exit (2); +} + + + +/* Command line parsing. */ +static enum cmd_and_opt_values +parse_arguments (ARGPARSE_ARGS *pargs, ARGPARSE_OPTS *popts) +{ + enum cmd_and_opt_values cmd = 0; + int no_more_options = 0; + + while (!no_more_options && gnupg_argparse (NULL, pargs, popts)) + { + switch (pargs->r_opt) + { + case oQuiet: opt.quiet = 1; break; + case oVerbose: opt.verbose++; break; + case oDebug: + if (parse_debug_flag (pargs->r.ret_str, &opt.debug, debug_flags)) + { + pargs->r_opt = ARGPARSE_INVALID_ARG; + pargs->err = ARGPARSE_PRINT_ERROR; + } + break; + + case oGpgProgram: + opt.gpg_program = pargs->r.ret_str; + break; + case oDirectory: + opt.directory = pargs->r.ret_str; + break; + case oFrom: + opt.default_from = pargs->r.ret_str; + break; + case oHeader: + append_to_strlist (&opt.extra_headers, pargs->r.ret_str); + break; + case oSend: + opt.use_sendmail = 1; + break; + case oOutput: + opt.output = pargs->r.ret_str; + break; + case oWithDir: + opt_with_dir = 1; + break; + case oWithFile: + opt_with_file = 1; + break; + + case aReceive: + case aCron: + case aListDomains: + case aCheck: + case aInstallKey: + case aRemoveKey: + case aRevokeKey: + cmd = pargs->r_opt; + break; + + default: pargs->err = ARGPARSE_PRINT_ERROR; break; + } + } + + return cmd; +} + + + +/* gpg-wks-server main. */ +int +main (int argc, char **argv) +{ + gpg_error_t err, firsterr; + ARGPARSE_ARGS pargs; + enum cmd_and_opt_values cmd; + + gnupg_reopen_std ("gpg-wks-server"); + set_strusage (my_strusage); + log_set_prefix ("gpg-wks-server", GPGRT_LOG_WITH_PREFIX); + + /* Make sure that our subsystems are ready. */ + init_common_subsystems (&argc, &argv); + + /* Parse the command line. */ + pargs.argc = &argc; + pargs.argv = &argv; + pargs.flags = ARGPARSE_FLAG_KEEP; + cmd = parse_arguments (&pargs, opts); + gnupg_argparse (NULL, &pargs, NULL); /* Release internal state. */ + + if (log_get_errorcount (0)) + exit (2); + + /* Print a warning if an argument looks like an option. */ + if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN)) + { + int i; + + for (i=0; i < argc; i++) + if (argv[i][0] == '-' && argv[i][1] == '-') + log_info (("NOTE: '%s' is not considered an option\n"), argv[i]); + } + + /* Set defaults for non given options. */ + if (!opt.gpg_program) + opt.gpg_program = gnupg_module_name (GNUPG_MODULE_NAME_GPG); + + if (!opt.directory) + opt.directory = "/var/lib/gnupg/wks"; + + /* Check for syntax errors in the --header option to avoid later + * error messages with a not easy to find cause */ + if (opt.extra_headers) + { + strlist_t sl; + + for (sl = opt.extra_headers; sl; sl = sl->next) + { + err = mime_maker_add_header (NULL, sl->d, NULL); + if (err) + log_error ("syntax error in \"--header %s\": %s\n", + sl->d, gpg_strerror (err)); + } + } + + if (log_get_errorcount (0)) + exit (2); + + + /* Check that we have a working directory. */ +#if defined(HAVE_STAT) + { + struct stat sb; + + if (gnupg_stat (opt.directory, &sb)) + { + err = gpg_error_from_syserror (); + log_error ("error accessing directory '%s': %s\n", + opt.directory, gpg_strerror (err)); + exit (2); + } + if (!S_ISDIR(sb.st_mode)) + { + log_error ("error accessing directory '%s': %s\n", + opt.directory, "not a directory"); + exit (2); + } + if (sb.st_uid != getuid()) + { + log_error ("directory '%s' not owned by user\n", opt.directory); + exit (2); + } + if ((sb.st_mode & (S_IROTH|S_IWOTH))) + { + log_error ("directory '%s' has too relaxed permissions\n", + opt.directory); + log_info ("Fix by running: chmod o-rw '%s'\n", opt.directory); + exit (2); + } + } +#else /*!HAVE_STAT*/ + log_fatal ("program build w/o stat() call\n"); +#endif /*!HAVE_STAT*/ + + /* Run the selected command. */ + switch (cmd) + { + case aReceive: + if (argc) + wrong_args ("--receive"); + err = wks_receive (es_stdin, command_receive_cb, NULL); + break; + + case aCron: + if (argc) + wrong_args ("--cron"); + err = command_cron (); + break; + + case aListDomains: + err = command_list_domains (); + break; + + case aInstallKey: + if (!argc) + err = wks_cmd_install_key (NULL, NULL); + else if (argc == 2) + err = wks_cmd_install_key (*argv, argv[1]); + else + wrong_args ("--install-key [FILE|FINGERPRINT USER-ID]"); + break; + + case aRemoveKey: + if (argc != 1) + wrong_args ("--remove-key USER-ID"); + err = wks_cmd_remove_key (*argv); + break; + + case aRevokeKey: + if (argc != 1) + wrong_args ("--revoke-key USER-ID"); + err = command_revoke_key (*argv); + break; + + case aCheck: + if (!argc) + wrong_args ("--check USER-IDs"); + firsterr = 0; + for (; argc; argc--, argv++) + { + err = command_check_key (*argv); + if (!firsterr) + firsterr = err; + } + err = firsterr; + 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; +} + + +/* 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 = NULL; + 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 (DBG_CRYPTO) + log_debug ("gpg status: %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, "-z0"); /* No compression for improved robustness. */ + 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; +} + + +static void +sign_stream_status_cb (void *opaque, const char *keyword, char *args) +{ + (void)opaque; + + if (DBG_CRYPTO) + log_debug ("gpg status: %s %s\n", keyword, args); +} + +/* Sign the INPUT stream to a new stream which is stored at success at + * R_OUTPUT. A detached signature is created using the key specified + * by USERID. */ +static gpg_error_t +sign_stream (estream_t *r_output, estream_t input, const char *userid) +{ + 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, "--armor"); + ccparray_put (&ccp, "--local-user"); + ccparray_put (&ccp, userid); + ccparray_put (&ccp, "--detach-sign"); + 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, + sign_stream_status_cb, NULL); + if (err) + { + log_error ("signing 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; +} + + +/* Create the name for the pending file from NONCE and ADDRSPEC and + * store it at R_NAME. */ +static gpg_error_t +make_pending_fname (const char *nonce, const char *addrspec, char **r_name) +{ + gpg_error_t err = 0; + const char *domain; + char *addrspechash = NULL; + char sha1buf[20]; + + *r_name = NULL; + + domain = addrspec? strchr (addrspec, '@') : NULL; + if (!domain || !domain[1] || domain == addrspec) + { + err = gpg_error (GPG_ERR_INV_ARG); + goto leave; + } + domain++; + if (strchr (domain, '/') || strchr (domain, '\\')) + { + log_info ("invalid domain detected ('%s')\n", domain); + err = gpg_error (GPG_ERR_NOT_FOUND); + goto leave; + } + gcry_md_hash_buffer (GCRY_MD_SHA1, sha1buf, addrspec, domain - addrspec - 1); + addrspechash = zb32_encode (sha1buf, 8*20); + if (!addrspechash) + { + err = gpg_error_from_syserror (); + goto leave; + } + + *r_name = strconcat (nonce, ".", addrspechash, NULL); + if (!*r_name) + { + err = gpg_error_from_syserror (); + goto leave; + } + + leave: + xfree (addrspechash); + 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. ADDRSPEC is used as part of the pending file name + * so that the nonce is associated with an address */ +static gpg_error_t +store_key_as_pending (const char *dir, estream_t key, const char *addrspec, + char **r_nonce, char **r_fname) +{ + gpg_error_t err; + char *dname = NULL; + char *fname = NULL; + char *nonce = NULL; + char *pendingname = 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; + } + + err = make_pending_fname (nonce, addrspec, &pendingname); + if (err) + goto leave; + + fname = strconcat (dname, "/", pendingname, 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); + xfree (pendingname); + 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; + estream_t signeddata = NULL; + estream_t signature = 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; + } + + if (!ctx->draft_version_2) + { + /* 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; + + err = mime_maker_add_header (mime, "Wks-Draft-Version", + STR2(WKS_DRAFT_VERSION)); + if (err) + goto leave; + + /* Help Enigmail to identify messages. Note that this is in no way + * secured. */ + err = mime_maker_add_header (mime, "WKS-Phase", "confirm"); + 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; + } + + if (!ctx->draft_version_2) + { + err = mime_maker_add_header (mime, "Content-Type", + "multipart/encrypted; " + "protocol=\"application/pgp-encrypted\""); + if (err) + goto leave; + err = mime_maker_add_container (mime); + 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; + + } + else + { + unsigned int partid; + + /* FIXME: Add micalg. */ + err = mime_maker_add_header (mime, "Content-Type", + "multipart/signed; " + "protocol=\"application/pgp-signature\""); + if (err) + goto leave; + err = mime_maker_add_container (mime); + if (err) + goto leave; + + err = mime_maker_add_header (mime, "Content-Type", "multipart/mixed"); + if (err) + goto leave; + + err = mime_maker_add_container (mime); + if (err) + goto leave; + partid = mime_maker_get_partid (mime); + + err = mime_maker_add_header (mime, "Content-Type", "text/plain"); + if (err) + goto leave; + + err = mime_maker_add_body + (mime, + "This message has been send to confirm your request\n" + "to publish your key. If you did not request a key\n" + "publication, simply ignore this message.\n" + "\n" + "Most mail software can handle this kind of message\n" + "automatically and thus you would not have seen this\n" + "message. It seems that your client does not fully\n" + "support this service. The web page\n" + "\n" + " https://gnupg.org/faq/wkd.html\n" + "\n" + "explains how you can process this message anyway in\n" + "a few manual steps.\n"); + if (err) + goto leave; + + err = mime_maker_add_header (mime, "Content-Type", + "application/vnd.gnupg.wks"); + if (err) + goto leave; + + err = mime_maker_add_stream (mime, &bodyenc); + if (err) + goto leave; + + err = mime_maker_end_container (mime); + if (err) + goto leave; + + /* mime_maker_dump_tree (mime); */ + err = mime_maker_get_part (mime, partid, &signeddata); + if (err) + goto leave; + + err = sign_stream (&signature, signeddata, from); + if (err) + goto leave; + + err = mime_maker_add_header (mime, "Content-Type", + "application/pgp-signature"); + if (err) + goto leave; + + err = mime_maker_add_stream (mime, &signature); + if (err) + goto leave; + } + + err = wks_send_mime (mime); + + leave: + mime_maker_release (mime); + es_fclose (signature); + es_fclose (signeddata); + 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; + uidinfo_list_t sl; + const char *s; + char *dname = NULL; + char *nonce = NULL; + char *fname = NULL; + struct policy_flags_s policybuf; + + memset (&policybuf, 0, sizeof policybuf); + + /* First figure out the user id from the key. */ + xfree (ctx->fpr); + free_uidinfo_list (ctx->mboxes); + err = wks_list_key (key, &ctx->fpr, &ctx->mboxes); + if (err) + goto leave; + log_assert (ctx->fpr); + log_info ("fingerprint: %s\n", ctx->fpr); + for (sl = ctx->mboxes; sl; sl = sl->next) + { + if (sl->mbox) + log_info (" addr-spec: %s\n", sl->mbox); + } + + /* Walk over all user ids and send confirmation requests for those + * we support. */ + for (sl = ctx->mboxes; sl; sl = sl->next) + { + if (!sl->mbox) + continue; + s = strchr (sl->mbox, '@'); + 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 (gnupg_access (dname, W_OK)) + { + log_info ("skipping address '%s': Domain not configured\n", sl->mbox); + continue; + } + if (get_policy_flags (&policybuf, sl->mbox)) + { + log_info ("skipping address '%s': Bad policy flags\n", sl->mbox); + continue; + } + + if (policybuf.auth_submit) + { + /* Bypass the confirmation stuff and publish the key as is. */ + log_info ("publishing address '%s'\n", sl->mbox); + /* 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->mbox); + + xfree (nonce); + xfree (fname); + err = store_key_as_pending (dname, key, sl->mbox, &nonce, &fname); + if (err) + goto leave; + + err = send_confirmation_request (ctx, sl->mbox, nonce, fname); + if (err) + goto leave; + } + } + + leave: + if (nonce) + wipememory (nonce, strlen (nonce)); + xfree (nonce); + xfree (fname); + xfree (dname); + wks_free_policy (&policybuf); + 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; + err = mime_maker_add_header (mime, "Wks-Draft-Version", + STR2(WKS_DRAFT_VERSION)); + if (err) + goto leave; + err = mime_maker_add_header (mime, "WKS-Phase", "done"); + 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); + 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; + char *pendingname = NULL; + const char *domain; + const char *s; + uidinfo_list_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++; + if (strchr (domain, '/') || strchr (domain, '\\') + || strchr (nonce, '/') || strchr (nonce, '\\')) + { + log_info ("invalid domain or nonce received ('%s', '%s')\n", + domain, nonce); + err = gpg_error (GPG_ERR_NOT_FOUND); + goto leave; + } + + err = make_pending_fname (nonce, address, &pendingname); + if (err) + goto leave; + + fname = make_filename_try (opt.directory, domain, "pending", pendingname, + 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. */ + xfree (ctx->fpr); + free_uidinfo_list (ctx->mboxes); + err = wks_list_key (key, &ctx->fpr, &ctx->mboxes); + if (err) + goto leave; + log_assert (ctx->fpr); + log_info ("fingerprint: %s\n", ctx->fpr); + for (sl = ctx->mboxes; sl; sl = sl->next) + if (sl->mbox) + log_info (" addr-spec: %s\n", sl->mbox); + + /* 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 (sl->mbox && !strcmp (sl->mbox, 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. */ + err = wks_compute_hu_fname (&fnewname, address); + if (err) + 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; + } + + /* Make sure it is world readable. */ + if (gnupg_chmod (fnewname, "-rw-r--r--")) + log_error ("can't set permissions of '%s': %s\n", + fnewname, gpg_strerror (gpg_err_code_from_syserror())); + + 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 (!gnupg_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); + xfree (pendingname); + 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, unsigned int flags) +{ + gpg_error_t err; + struct server_ctx_s ctx; + + (void)opaque; + + memset (&ctx, 0, sizeof ctx); + if ((flags & WKS_RECEIVE_DRAFT2)) + ctx.draft_version_2 = 1; + + 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_uidinfo_list (ctx.mboxes); + + return err; +} + + + +/* Return a list of all configured domains. Each list element is the + * top directory 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; + gnupg_dir_t dir = NULL; + char *fname = NULL; + gnupg_dirent_t dentry; + struct stat sb; + strlist_t list = NULL; + + *r_list = NULL; + + dir = gnupg_opendir (opt.directory); + if (!dir) + { + err = gpg_error_from_syserror (); + goto leave; + } + + while ((dentry = gnupg_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 (gnupg_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); + gnupg_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; + gnupg_dir_t dir = NULL; + gnupg_dirent_t 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 = gnupg_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 = gnupg_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; + } + /* The old files are 32 bytes, those created since 2.3.8 are 65 bytes. */ + if (strlen (dentry->d_name) != 32 && strlen (dentry->d_name) != 65) + { + log_info ("garbage file '%s' ignored\n", fname); + continue; + } + if (gnupg_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: + gnupg_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_err_code_t ec; + 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++; + if (opt_with_dir) + es_printf ("%s %s\n", domain, sl->d); + else + 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 ((ec = gnupg_access (fname, W_OK))) + { + err = gpg_error (ec); + 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 ((ec = gnupg_access (fname, F_OK))) + { + err = gpg_error (ec); + 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) + { + fp = es_fopen (fname, "w"); + if (!fp) + log_error ("domain %s: can't create policy file: %s\n", + domain, gpg_strerror (err)); + else + es_fclose (fp); + fp = NULL; + } + else + 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); + wks_free_policy (&policy); + } + } + 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; +} + + +/* Check whether the key with USER_ID is installed. */ +static gpg_error_t +command_check_key (const char *userid) +{ + gpg_err_code_t ec; + gpg_error_t err; + char *addrspec = NULL; + char *fname = NULL; + + err = wks_fname_from_userid (userid, 0, &fname, &addrspec); + if (err) + goto leave; + + if ((ec = gnupg_access (fname, R_OK))) + { + err = gpg_error (ec); + if (opt_with_file) + es_printf ("%s n %s\n", addrspec, fname); + if (gpg_err_code (err) == GPG_ERR_ENOENT) + { + if (!opt.quiet) + log_info ("key for '%s' is NOT installed\n", addrspec); + log_inc_errorcount (); + err = 0; + } + else + log_error ("error stating '%s': %s\n", fname, gpg_strerror (err)); + goto leave; + } + + if (opt_with_file) + es_printf ("%s i %s\n", addrspec, fname); + + if (opt.verbose) + log_info ("key for '%s' is installed\n", addrspec); + err = 0; + + leave: + xfree (fname); + xfree (addrspec); + return err; +} + + +/* Revoke the key with mail address MAILADDR. */ +static gpg_error_t +command_revoke_key (const char *mailaddr) +{ + /* Remove should be different from removing but we have not yet + * defined a suitable way to do this. */ + return wks_cmd_remove_key (mailaddr); +} |