1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058
|
/* =====================================================================
* Copyright (c) 1996 Vidya Media Ventures, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of this source code or a derived source code must
* retain the above copyright notice, this list of conditions and the
* following disclaimer.
*
* 2. Redistributions of this module or a derived module in binary form
* must reproduce the above copyright notice, this list of conditions
* and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY VIDYA MEDIA VENTURES, INC. ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL VIDYA MEDIA VENTURES, INC.
* OR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software is a contribution to and makes use of the Apache HTTP
* server which is written, maintained and copywritten by the Apache Group.
* See http://www.apache.org/ for more information.
*
* This software makes use of libpq which an interface to the PostgreSQL
* database. PostgreSQL is copyright (c) 1994 by the Regents of the
* University of California. As of this writing, more information on
* PostgreSQL can be found at http://www.postgresSQL.org/
*
*/
/*
*
* PostgreSQL authentication
*
*
* Needs libpq-fe.h and libpq.a
*
* Outline:
*
* - Authentication
* One database, and one (or two) tables. One table holds the username and
* the encryped (or plain) password. The other table holds the username and the names
* of the group to which the user belongs. It is possible to have username,
* groupname and password in the same table.
* - Access Logging
* Every authentication access is logged in the same database of the
* authentication table, but in different table.
* User name and date of the request are logged.
* As option, it can log password, ip address, request line.
*
* Module Directives: See html documentation
*
* Changelog: See html documentation
*
* see http://www.postgreSQL.org/
*
*
*
* Homepage http://www.giuseppetanzilli.it/mod_auth_pgsql/
*
* Latest sources http://www.giuseppetanzilli.it/mod_auth_pgsql/dist/
*
* Maintainer:
* Giuseppe Tanzilli
* info@giuseppetanzilli.it
* g.tanzilli@gruppocsf.com
*
* Original source:
* Adam Sussman (asussman@vidya.com) Feb, 1996
* Matthias Eckermann
* eckerman@lrz.uni-muenchen.de
*
*/
#define AUTH_PGSQL_VERSION "2.0.3"
#include "apr_hooks.h"
#include "apr.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_md5.h"
#include "apr_network_io.h"
#include "apr_pools.h"
#include "apr_uri.h"
#include "apr_date.h"
#include "apr_fnmatch.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_main.h"
#include "http_protocol.h"
#include "http_request.h"
#include "util_script.h"
#include "mod_auth.h"
#ifdef WIN32
#define crypt apr_password_validate
#else
#include <unistd.h>
#endif
#include "libpq-fe.h"
#if (MODULE_MAGIC_NUMBER_MAJOR < 20020628)
#error Apache 2.0.40 required
#endif
/*
** uncomment the following line if you're having problem. The debug messages
** will be written to the server error log.
** WARNING: we log sensitive data, do not use on production systems
*/
/* #define DEBUG_AUTH_PGSQL 1 */
#ifndef MAX_STRING_LEN
#define MAX_STRING_LEN 8192
#endif
/* Cache table size */
#ifndef MAX_TABLE_LEN
#define MAX_TABLE_LEN 50
#endif
#define AUTH_PG_HASH_TYPE_CRYPT 1
#define AUTH_PG_HASH_TYPE_MD5 2
#define AUTH_PG_HASH_TYPE_BASE64 3
typedef struct {
const char *dir;
const char *auth_pg_host;
const char *auth_pg_database;
const char *auth_pg_port;
const char *auth_pg_options;
const char *auth_pg_user;
const char *auth_pg_charset;
const char *auth_pg_pwd;
const char *auth_pg_pwd_table;
const char *auth_pg_uname_field;
const char *auth_pg_pwd_field;
const char *auth_pg_grp_table;
const char *auth_pg_grp_group_field;
const char *auth_pg_grp_user_field;
const char *auth_pg_pwd_whereclause;
const char *auth_pg_grp_whereclause;
int auth_pg_nopasswd;
int auth_pg_authoritative;
int auth_pg_lowercaseuid;
int auth_pg_uppercaseuid;
int auth_pg_pwdignorecase;
int auth_pg_encrypted;
int auth_pg_hash_type;
int auth_pg_cache_passwords;
const char *auth_pg_log_table;
const char *auth_pg_log_addrs_field;
const char *auth_pg_log_uname_field;
const char *auth_pg_log_pwd_field;
const char *auth_pg_log_date_field;
const char *auth_pg_log_uri_field;
apr_table_t *cache_pass_table;
} pg_auth_config_rec;
static PGconn *pg_conn;
static apr_pool_t *auth_pgsql_pool = NULL;
static apr_pool_t *auth_pgsql_pool_base64 = NULL;
module AP_MODULE_DECLARE_DATA auth_pgsql_module;
static int pg_log_auth_user(request_rec * r, pg_auth_config_rec * sec,
const char *user, const char *sent_pw);
static char *do_pg_query(request_rec * r, char *query,
pg_auth_config_rec * sec);
static void *create_pg_auth_dir_config(apr_pool_t * p, char *d)
{
pg_auth_config_rec *new_rec;
#ifdef DEBUG_AUTH_PGSQL
ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
"[mod_auth_pgsql.c] - going to configure directory \"%s\" ",
d);
#endif /* DEBUG_AUTH_PGSQL */
new_rec = apr_pcalloc(p, sizeof(pg_auth_config_rec));
if (new_rec == NULL)
return NULL;
if (auth_pgsql_pool == NULL)
apr_pool_create_ex(&auth_pgsql_pool, NULL, NULL, NULL);
if (auth_pgsql_pool == NULL)
return NULL;
/* sane defaults */
if (d != NULL)
new_rec->dir = apr_pstrdup(p, d);
else
new_rec->dir = NULL;
new_rec->auth_pg_host = NULL;
new_rec->auth_pg_database = NULL;
new_rec->auth_pg_port = NULL;
new_rec->auth_pg_options = NULL;
new_rec->auth_pg_user = NULL;
new_rec->auth_pg_charset = NULL;
new_rec->auth_pg_pwd = NULL;
new_rec->auth_pg_pwd_table = NULL;
new_rec->auth_pg_uname_field = NULL;
new_rec->auth_pg_pwd_field = NULL;
new_rec->auth_pg_grp_table = NULL;
new_rec->auth_pg_grp_user_field = NULL;
new_rec->auth_pg_grp_group_field = NULL;
new_rec->auth_pg_pwd_whereclause = NULL;
new_rec->auth_pg_grp_whereclause = NULL;
new_rec->auth_pg_nopasswd = 0;
new_rec->auth_pg_authoritative = 1;
new_rec->auth_pg_lowercaseuid = 0;
new_rec->auth_pg_uppercaseuid = 0;
new_rec->auth_pg_pwdignorecase = 0;
new_rec->auth_pg_encrypted = 1;
new_rec->auth_pg_hash_type = AUTH_PG_HASH_TYPE_CRYPT;
new_rec->auth_pg_cache_passwords = 0;
new_rec->auth_pg_log_table = NULL;
new_rec->auth_pg_log_addrs_field = NULL;
new_rec->auth_pg_log_uname_field = NULL;
new_rec->auth_pg_log_pwd_field = NULL;
new_rec->auth_pg_log_date_field = NULL;
new_rec->auth_pg_log_uri_field = NULL;
/* make a per directory cache table */
new_rec->cache_pass_table =
apr_table_make(auth_pgsql_pool, MAX_TABLE_LEN);
if (new_rec->cache_pass_table == NULL)
return NULL;
#ifdef DEBUG_AUTH_PGSQL
ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
"[mod_auth_pgsql.c] - configured directory \"%s\" ", d);
#endif /* DEBUG_AUTH_PGSQL */
return new_rec;
}
static const char *pg_set_hash_type(cmd_parms * cmd, void *mconfig,
const char *hash_type)
{
pg_auth_config_rec *sec = mconfig;
if (!strcasecmp(hash_type, "MD5"))
sec->auth_pg_hash_type = AUTH_PG_HASH_TYPE_MD5;
else if (!strcasecmp(hash_type, "CRYPT"))
sec->auth_pg_hash_type = AUTH_PG_HASH_TYPE_CRYPT;
else if (!strcasecmp(hash_type, "BASE64"))
sec->auth_pg_hash_type = AUTH_PG_HASH_TYPE_BASE64;
else
return apr_pstrcat(cmd->pool,
"Invalid hash type for Auth_PG_hash_type: ",
hash_type, NULL);
return NULL;
}
static const char *pg_set_authoritative_flag(cmd_parms * cmd,
pg_auth_config_rec * sec, const int arg)
{
sec->auth_pg_authoritative = arg;
return NULL;
}
static const char *pg_set_lowercaseuid_flag(cmd_parms * cmd, void *sec,
const int arg)
{
((pg_auth_config_rec *) sec)->auth_pg_lowercaseuid = arg;
((pg_auth_config_rec *) sec)->auth_pg_uppercaseuid = 0;
return NULL;
}
static const char *pg_set_uppercaseuid_flag(cmd_parms * cmd, void *sec,
int arg)
{
((pg_auth_config_rec *) sec)->auth_pg_uppercaseuid = arg;
((pg_auth_config_rec *) sec)->auth_pg_lowercaseuid = 0;
return NULL;
}
static const command_rec pg_auth_cmds[] = {
AP_INIT_TAKE1("Auth_PG_host", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec, auth_pg_host),
OR_AUTHCFG,
"the host name of the postgreSQL server."),
AP_INIT_TAKE1("Auth_PG_database", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_database), OR_AUTHCFG,
"the name of the database that contains authorization information."),
AP_INIT_TAKE1("Auth_PG_port", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec, auth_pg_port),
OR_AUTHCFG,
"the port the postmaster is running on."),
AP_INIT_TAKE1("Auth_PG_options", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_options), OR_AUTHCFG,
"an options string to be sent to the postgres backed process."),
AP_INIT_TAKE1("Auth_PG_user", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec, auth_pg_user),
OR_AUTHCFG,
"user name connect as"),
AP_INIT_TAKE1("Auth_PG_charset", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec, auth_pg_charset),
OR_AUTHCFG,
"charset to use for connection"),
AP_INIT_TAKE1("Auth_PG_pwd", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec, auth_pg_pwd),
OR_AUTHCFG,
"password to connect"),
AP_INIT_TAKE1("Auth_PG_pwd_table", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_pwd_table), OR_AUTHCFG,
"the name of the table containing username/password tuples."),
AP_INIT_TAKE1("Auth_PG_pwd_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_pwd_field), OR_AUTHCFG,
"the name of the password field."),
AP_INIT_TAKE1("Auth_PG_uid_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_uname_field), OR_AUTHCFG,
"the name of the user-id field."),
AP_INIT_TAKE1("Auth_PG_grp_table", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_grp_table), OR_AUTHCFG,
"the name of the table containing username/group tuples."),
AP_INIT_TAKE1("Auth_PG_grp_group_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_grp_group_field),
OR_AUTHCFG,
"the name of the group-name field."),
AP_INIT_TAKE1("Auth_PG_grp_user_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_grp_user_field),
OR_AUTHCFG,
"the name of the group-name field."),
AP_INIT_FLAG("Auth_PG_nopasswd", ap_set_flag_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_nopasswd),
OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_FLAG("Auth_PG_encrypted", ap_set_flag_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_encrypted),
OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_TAKE1("Auth_PG_hash_type", pg_set_hash_type, NULL, OR_AUTHCFG,
"password hash type (CRYPT|MD5|BASE64)."),
AP_INIT_FLAG("Auth_PG_cache_passwords", ap_set_flag_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_cache_passwords),
OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_FLAG("Auth_PG_authoritative", ap_set_flag_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_authoritative), OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_FLAG("Auth_PG_lowercase_uid", pg_set_lowercaseuid_flag, NULL,
OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_FLAG("Auth_PG_uppercase_uid", pg_set_uppercaseuid_flag, NULL,
OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_FLAG("Auth_PG_pwd_ignore_case", ap_set_flag_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_pwdignorecase), OR_AUTHCFG,
"'on' or 'off'"),
AP_INIT_TAKE1("Auth_PG_grp_whereclause", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_grp_whereclause),
OR_AUTHCFG,
"an SQL fragement that can be attached to the end of a where clause."),
AP_INIT_TAKE1("Auth_PG_pwd_whereclause", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_pwd_whereclause),
OR_AUTHCFG,
"an SQL fragement that can be attached to the end of a where clause."),
AP_INIT_TAKE1("Auth_PG_log_table", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_log_table),
OR_AUTHCFG,
"the name of the table containing log tuples."),
AP_INIT_TAKE1("Auth_PG_log_addrs_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_log_addrs_field),
OR_AUTHCFG,
"the name of the field containing addrs in the log table (type char)."),
AP_INIT_TAKE1("Auth_PG_log_uname_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_log_uname_field),
OR_AUTHCFG,
"the name of the field containing username in the log table (type char)."),
AP_INIT_TAKE1("Auth_PG_log_pwd_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_log_pwd_field),
OR_AUTHCFG,
"the name of the field containing password in the log table (type char)."),
AP_INIT_TAKE1("Auth_PG_log_date_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_log_date_field),
OR_AUTHCFG,
"the name of the field containing date in the log table (type char)."),
AP_INIT_TAKE1("Auth_PG_log_uri_field", ap_set_string_slot,
(void *) APR_OFFSETOF(pg_auth_config_rec,
auth_pg_log_uri_field),
OR_AUTHCFG,
"the name of the field containing uri (Object fetched) in the log table (type char)."),
{NULL}
};
static char pg_errstr[MAX_STRING_LEN];
/* global errno to be able to handle config/sql
* failures separately
*/
static char *auth_pg_md5(const char *pw)
{
unsigned char digest[APR_MD5_DIGESTSIZE];
static unsigned char md5hash[APR_MD5_DIGESTSIZE * 2 + 1];
int i;
apr_md5(digest, (const unsigned char *) pw, strlen(pw));
for (i = 0; i < APR_MD5_DIGESTSIZE; i++)
apr_snprintf((char *) &md5hash[i + i], 3, "%02x", digest[i]);
md5hash[APR_MD5_DIGESTSIZE * 2] = '\0';
return (char *) md5hash;
}
static char *auth_pg_base64(const char *pw)
{
if (auth_pgsql_pool_base64 == NULL)
apr_pool_create_ex(&auth_pgsql_pool_base64, NULL, NULL, NULL);
if (auth_pgsql_pool == NULL)
return NULL;
/* NOTE: ap_pbase64encode is no change arg2. so removable const. */
return ap_pbase64encode(auth_pgsql_pool, (char *)pw);
}
PGconn *pg_connect(pg_auth_config_rec *sec)
{
PGconn *conn;
conn = PQsetdbLogin(sec->auth_pg_host, sec->auth_pg_port,
sec->auth_pg_options, NULL, sec->auth_pg_database,
sec->auth_pg_user, sec->auth_pg_pwd);
if (PQstatus(conn) != CONNECTION_OK) {
PQreset(conn);
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"mod_auth_pgsql database connection error resetting %s",
PQerrorMessage(conn));
if (PQstatus(conn) != CONNECTION_OK) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"mod_auth_pgsql database connection error reset failed %s",
PQerrorMessage(conn));
PQfinish(conn);
conn = NULL;
return NULL;
}
}
return conn;
}
static size_t pg_check_string(char *to, const char *from, size_t length, request_rec * r, pg_auth_config_rec *sec)
{
int error;
if (!pg_conn) {
if (!(pg_conn = pg_connect(sec))) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - cannot connect to database");
ap_note_basic_auth_failure(r);
return -1;
}
}
PQescapeStringConn(pg_conn, to, from, length, &error);
if (error) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - cannot escape string");
ap_note_basic_auth_failure(r);
return -1;
}
return 0;
}
/* Do a query and return the (0,0) value. The query is assumed to be
* a select.
*/
char *do_pg_query(request_rec * r, char *query, pg_auth_config_rec * sec)
{
PGresult *pg_result;
char *val;
char *result = NULL;
pg_errstr[0] = '\0';
#ifdef DEBUG_AUTH_PGSQL
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[mod_auth_pgsql.c] - do_pg_query - going to connect database \"%s\" ",
sec->auth_pg_database);
#endif /* DEBUG_AUTH_PGSQL */
if (!pg_conn) {
if (!(pg_conn = pg_connect(sec))) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - cannot connect to database");
ap_note_basic_auth_failure(r);
return NULL;
}
}
#ifdef DEBUG_AUTH_PGSQL
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[mod_auth_pgsql.c] - do_pg_query - going to execute query \"%s\" ",
query);
#endif /* DEBUG_AUTH_PGSQL */
if (sec->auth_pg_charset) {
const char *check;
PQsetClientEncoding(pg_conn, sec->auth_pg_charset);
check = pg_encoding_to_char(PQclientEncoding(pg_conn));
if (!check || strcmp(sec->auth_pg_charset, check)) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"mod_auth_pgsql database character set encoding %s",
check);
PQfinish(pg_conn);
pg_conn = NULL;
return NULL;
}
}
pg_result = PQexec(pg_conn, query);
if (pg_result == NULL) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"PGSQL 2: %s -- Query: %s ",
PQerrorMessage(pg_conn), query);
PQfinish(pg_conn);
pg_conn = NULL;
return NULL;
}
if (PQresultStatus(pg_result) == PGRES_EMPTY_QUERY) {
PQclear(pg_result);
pg_result = NULL;
PQfinish(pg_conn);
pg_conn = NULL;
return NULL;
}
if (PQresultStatus(pg_result) != PGRES_TUPLES_OK) {
apr_snprintf(pg_errstr, MAX_STRING_LEN, "PGSQL 3: %s -- Query: %s",
PQerrorMessage(pg_conn), query);
PQclear(pg_result);
pg_result = NULL;
PQfinish(pg_conn);
pg_conn = NULL;
return NULL;
}
if (PQntuples(pg_result) == 1) {
val = PQgetvalue(pg_result, 0, 0);
if (val == NULL) {
apr_snprintf(pg_errstr, MAX_STRING_LEN, "PGSQL 4: %s",
PQerrorMessage(pg_conn));
PQclear(pg_result);
pg_result = NULL;
PQfinish(pg_conn);
pg_conn = NULL;
return NULL;
}
if (!(result = (char *) apr_pcalloc(r->pool, strlen(val) + 1))) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"Could not get memory for Postgres query.");
PQclear(pg_result);
pg_result = NULL;
PQfinish(pg_conn);
pg_conn = NULL;
return NULL;
}
strcpy(result, val);
}
/* ignore errors here ! */
PQclear(pg_result);
pg_result = NULL;
PQfinish(pg_conn);
pg_conn = NULL;
return result;
}
char *get_pg_pw(request_rec * r, const char *user, pg_auth_config_rec * sec)
{
char query[MAX_STRING_LEN];
char *safe_user;
int n;
safe_user = apr_palloc(r->pool, 1 + 2 * strlen(user));
pg_check_string(safe_user, user, strlen(user), r, sec);
#ifdef DEBUG_AUTH_PGSQL
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[mod_auth_pgsql.c] - get_pg_pw - going to retrieve password for user \"%s\" from database",
user);
#endif /* DEBUG_AUTH_PGSQL */
if ((!sec->auth_pg_pwd_table) ||
(!sec->auth_pg_pwd_field) || (!sec->auth_pg_uname_field)) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"PG: Missing parameters for password lookup: %s%s%s",
(sec->auth_pg_pwd_table ? "" : "Password table "),
(sec->
auth_pg_pwd_field ? "" : "Password field name "),
(sec->
auth_pg_uname_field ? "" : "UserID field name "));
return NULL;
};
if (sec->auth_pg_lowercaseuid) {
/* and force it to lowercase */
n = 0;
while (safe_user[n] && n < (MAX_STRING_LEN - 1)) {
if (isupper(safe_user[n])) {
safe_user[n] = tolower(safe_user[n]);
}
n++;
}
}
if (sec->auth_pg_uppercaseuid) {
/* and force it to uppercase */
n = 0;
while (safe_user[n] && n < (MAX_STRING_LEN - 1)) {
if (islower(safe_user[n])) {
safe_user[n] = toupper(safe_user[n]);
}
n++;
}
}
n = apr_snprintf(query, MAX_STRING_LEN,
"select %s from %s where %s='%s' %s",
sec->auth_pg_pwd_field, sec->auth_pg_pwd_table,
sec->auth_pg_uname_field, safe_user,
sec->auth_pg_pwd_whereclause ? sec->
auth_pg_pwd_whereclause : "");
if (n < 0 || n > MAX_STRING_LEN) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"PG: Detected SQL-truncation attack. Auth aborted.");
return NULL;
}
return do_pg_query(r, query, sec);
}
static char *get_pg_grp(request_rec * r, char *group, char *user,
pg_auth_config_rec * sec)
{
char query[MAX_STRING_LEN];
char *safe_user;
char *safe_group;
int n;
safe_user = apr_palloc(r->pool, 1 + 2 * strlen(user));
safe_group = apr_palloc(r->pool, 1 + 2 * strlen(group));
#ifdef DEBUG_AUTH_PGSQL
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[mod_auth_pgsql.c] - get_pg_grp - going to retrieve group for user \"%s\" from database",
user);
#endif /* DEBUG_AUTH_PGSQL */
query[0] = '\0';
pg_check_string(safe_user, user, strlen(user), r, sec);
pg_check_string(safe_group, group, strlen(group), r, sec);
if ((!sec->auth_pg_grp_table) ||
(!sec->auth_pg_grp_group_field) || (!sec->auth_pg_grp_user_field))
{
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"PG: Missing parameters for password lookup: %s%s%s",
(sec->auth_pg_grp_table ? "" : "Group table name"),
(sec->
auth_pg_grp_group_field ? "" :
"GroupID field name "),
(sec->
auth_pg_grp_user_field ? "" :
"Group table user field name "));
return NULL;
};
if (sec->auth_pg_lowercaseuid) {
/* and force it to lowercase */
n = 0;
while (safe_user[n] && n < (MAX_STRING_LEN - 1)) {
if (isupper(safe_user[n])) {
safe_user[n] = tolower(safe_user[n]);
}
n++;
}
}
if (sec->auth_pg_uppercaseuid) {
/* and force it to uppercase */
n = 0;
while (safe_user[n] && n < (MAX_STRING_LEN - 1)) {
if (islower(safe_user[n])) {
safe_user[n] = toupper(safe_user[n]);
}
n++;
}
}
n = apr_snprintf(query, MAX_STRING_LEN,
"select %s from %s where %s='%s' and %s='%s' %s",
sec->auth_pg_grp_group_field, sec->auth_pg_grp_table,
sec->auth_pg_grp_user_field, safe_user,
sec->auth_pg_grp_group_field, safe_group,
sec->auth_pg_grp_whereclause ? sec->
auth_pg_grp_whereclause : "");
if (n < 0 || n > MAX_STRING_LEN) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"PG: Detected SQL-truncation attack. Auth aborted.");
return NULL;
}
return do_pg_query(r, query, sec);
}
/* Process authentication request from Apache*/
static authn_status check_password(request_rec *r, const char *user,
const char *password)
{
pg_auth_config_rec *sec =
(pg_auth_config_rec *) ap_get_module_config(r->per_dir_config,
&auth_pgsql_module);
const char *val = NULL;
const char *sent_pw;
const char *real_pw;
authn_status auth_res;
sent_pw = password;
#ifdef DEBUG_AUTH_PGSQL
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[mod_auth_pgsql.c] - pg_authenticate_basic_user - going to auth user \"%s\" pass \"%s\" uri \"%s\"",
user, sent_pw, r->unparsed_uri);
#endif /* DEBUG_AUTH_PGSQL */
/* if *password* checking is configured in any way, i.e. then
* handle it, if not decline and leave it to the next in line..
* We do not check on dbase, group, userid or host name, as it is
* perfectly possible to only do group control and leave
* user control to the next guy in line.
*/
if ((!sec->auth_pg_pwd_table) && (!sec->auth_pg_pwd_field)) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
"[mod_auth_pgsql.c] - missing configuration parameters");
return AUTH_GENERAL_ERROR;
}
pg_errstr[0] = '\0';
if (!pg_conn) {
if (!(pg_conn = pg_connect(sec))) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - cannot connect to database");
ap_note_basic_auth_failure(r);
return HTTP_UNAUTHORIZED;
}
}
if (sec->auth_pg_cache_passwords
&& (!apr_is_empty_table(sec->cache_pass_table))) {
val = (char *) apr_table_get(sec->cache_pass_table, user);
if (val)
real_pw = val;
else
real_pw = get_pg_pw(r, user, sec);
} else
real_pw = get_pg_pw(r, user, sec);
if (!real_pw) {
if (pg_errstr[0]) {
auth_res = AUTH_GENERAL_ERROR;
} else {
/* force error and access denied */
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"mod_auth_pgsql: Password for user %s not found (PG-Authoritative)",
user);
auth_res = AUTH_USER_NOT_FOUND;
}
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - ERROR - %s", pg_errstr);
return auth_res;
}
/* allow no password, if the flag is set and the password
* is empty. But be sure to log this.
*/
if ((sec->auth_pg_nopasswd) && (!strlen(real_pw))) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"[mod_auth_pgsql.c] - Empty password accepted for user \"%s\"",
user);
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, "[mod_auth_pgsql.c] - ERROR - %s", pg_errstr);
pg_log_auth_user(r, sec, user, sent_pw);
return AUTH_GRANTED;
};
/* if the flag is off however, keep that kind of stuff at
* an arms length.
*/
if ((!strlen(real_pw)) || (!strlen(sent_pw))) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"[mod_auth_pgsql.c] - Empty password rejected for user \"%s\"",
user);
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - ERROR - %s", pg_errstr);
return AUTH_DENIED;
};
if (sec->auth_pg_encrypted)
switch (sec->auth_pg_hash_type) {
case AUTH_PG_HASH_TYPE_MD5:
sent_pw = auth_pg_md5(sent_pw);
break;
case AUTH_PG_HASH_TYPE_CRYPT:
sent_pw = (char *) crypt(sent_pw, real_pw);
break;
case AUTH_PG_HASH_TYPE_BASE64:
sent_pw = auth_pg_base64(sent_pw);
break;
}
if ((sec->auth_pg_hash_type == AUTH_PG_HASH_TYPE_MD5
|| sec->auth_pg_pwdignorecase != 0) ? strcasecmp(real_pw,
sent_pw) :
strcmp(real_pw, sent_pw))
if ((sec->auth_pg_hash_type == AUTH_PG_HASH_TYPE_MD5
|| sec->auth_pg_hash_type == AUTH_PG_HASH_TYPE_BASE64
|| sec->auth_pg_pwdignorecase)
? strcasecmp(real_pw, sent_pw) : strcmp(real_pw, sent_pw)) {
apr_snprintf(pg_errstr, MAX_STRING_LEN,
"PG user %s: password mismatch", user);
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "[mod_auth_pgsql.c] - ERROR - %s", pg_errstr);
return AUTH_DENIED;
}
/* store password in the cache */
if (sec->auth_pg_cache_passwords && !val && sec->cache_pass_table) {
if ((apr_table_elts(sec->cache_pass_table))->nelts >=
MAX_TABLE_LEN) {
apr_table_clear(sec->cache_pass_table);
}
apr_table_set(sec->cache_pass_table, user, real_pw);
}
pg_log_auth_user(r, sec, user, sent_pw);
return AUTH_GRANTED;
}
/* Send the authentication to the log table */
int
pg_log_auth_user(request_rec * r, pg_auth_config_rec * sec, const char *user,
const char *sent_pw)
{
char sql[MAX_STRING_LEN];
char *s;
int n;
char fields[MAX_STRING_LEN];
char values[MAX_STRING_LEN];
char *safe_user;
char *safe_pw;
char *safe_req;
char ts[MAX_STRING_LEN]; /* time in string format */
apr_time_exp_t t; /* time of request start */
apr_size_t retsize;
safe_user = apr_palloc(r->pool, 1 + 2 * strlen(user));
safe_pw = apr_palloc(r->pool, 1 + 2 * strlen(sent_pw));
safe_req = apr_palloc(r->pool, 1 + 2 * strlen(r->the_request));
/* we do not want to process internal redirect */
if (!ap_is_initial_req(r))
return DECLINED;
if ((!sec->auth_pg_log_table) || (!sec->auth_pg_log_uname_field) || (!sec->auth_pg_log_date_field)) { // At least table name, username and date field are specified
// send error message and exit
return DECLINED;
}
/* AUD: MAX_STRING_LEN probably isn't always correct */
pg_check_string(safe_user, user, strlen(user), r, sec);
pg_check_string(safe_pw, sent_pw, strlen(sent_pw), r, sec);
pg_check_string(safe_req, r->the_request, strlen(r->the_request), r, sec);
if (sec->auth_pg_lowercaseuid) {
/* and force it to lowercase */
n = 0;
while (safe_user[n] && n < (MAX_STRING_LEN - 1)) {
if (isupper(safe_user[n])) {
safe_user[n] = tolower(safe_user[n]);
}
n++;
}
}
if (sec->auth_pg_uppercaseuid) {
/* and force it to uppercase */
n = 0;
while (safe_user[n] && n < (MAX_STRING_LEN - 1)) {
if (islower(safe_user[n])) {
safe_user[n] = toupper(safe_user[n]);
}
n++;
}
}
/* time field format */
apr_time_exp_lt(&t, r->request_time);
apr_strftime(ts, &retsize, 100, "%Y-%m-%d %H:%M:%S", &t);
/* SQL Statement, required fields: Username, Date */
apr_snprintf(fields, MAX_STRING_LEN, "%s,%s",
sec->auth_pg_log_uname_field,
sec->auth_pg_log_date_field);
apr_snprintf(values, MAX_STRING_LEN, "'%s','%s'", safe_user, ts);
/* Optional parameters */
if (sec->auth_pg_log_addrs_field) { /* IP Address field */
apr_snprintf(sql, MAX_STRING_LEN, ", %s",
sec->auth_pg_log_addrs_field);
strncat(fields, sql, MAX_STRING_LEN - strlen(fields) - 1);
apr_snprintf(sql, MAX_STRING_LEN, ", '%s'",
r->connection->client_ip);
strncat(values, sql, MAX_STRING_LEN - strlen(values) - 1);
}
if (sec->auth_pg_log_pwd_field) { /* Password field , clear WARNING */
apr_snprintf(sql, MAX_STRING_LEN, ", %s",
sec->auth_pg_log_pwd_field);
strncat(fields, sql, MAX_STRING_LEN - strlen(fields) - 1);
apr_snprintf(sql, MAX_STRING_LEN, ", '%s'", safe_pw);
strncat(values, sql, MAX_STRING_LEN - strlen(values) - 1);
}
if (sec->auth_pg_log_uri_field) { /* request string */
apr_snprintf(sql, MAX_STRING_LEN, ", %s",
sec->auth_pg_log_uri_field);
strncat(fields, sql, MAX_STRING_LEN - strlen(fields) - 1);
apr_snprintf(sql, MAX_STRING_LEN, ", '%s'", safe_req);
strncat(values, sql, MAX_STRING_LEN - strlen(values) - 1);
}
apr_snprintf(sql, MAX_STRING_LEN, "insert into %s (%s) values(%s) ; ",
sec->auth_pg_log_table, fields, values);
s = do_pg_query(r, sql, sec);
return (0);
}
static int
pg_auth_init_handler(apr_pool_t * p, apr_pool_t * plog, apr_pool_t * ptemp,
server_rec * s)
{
#ifdef DEBUG_AUTH_PGSQL
ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
"[mod_auth_pgsql.c] - pg_auth_init_handler - ");
#endif /* DEBUG_AUTH_PGSQL */
ap_add_version_component(p, "mod_auth_pgsql/" AUTH_PGSQL_VERSION);
return OK;
}
/* Init the module private memory pool, used for the per directory cache tables */
static void *pg_auth_server_config(apr_pool_t * p, server_rec * s)
{
#ifdef DEBUG_AUTH_PGSQL
ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
"[mod_auth_pgsql.c] - pg_auth_server_config - ");
#endif /* DEBUG_AUTH_PGSQL */
if (auth_pgsql_pool == NULL)
apr_pool_create_ex(&auth_pgsql_pool, NULL, NULL, NULL);
return OK;
}
static const authn_provider authn_pgsql_provider =
{
&check_password,
NULL,
};
static void register_hooks(apr_pool_t * p)
{
ap_hook_post_config(pg_auth_init_handler, NULL, NULL, APR_HOOK_MIDDLE);
ap_register_auth_provider(p, AUTHN_PROVIDER_GROUP, "pgsql",
AUTHN_PROVIDER_VERSION,
&authn_pgsql_provider, AP_AUTH_INTERNAL_PER_CONF);
};
AP_DECLARE_MODULE(auth_pgsql) = {
STANDARD20_MODULE_STUFF,
create_pg_auth_dir_config, /* dir config creater */
NULL, /* dir merger --- default is to override */
pg_auth_server_config, /* server config */
NULL, /* merge server config */
pg_auth_cmds, /* command table */
register_hooks /* Apache2 register hooks */
};
|