1 /*-------------------------------------------------------------------------
4 * Routines to handle host based authentication (that's the scheme
5 * wherein you authenticate a user by seeing what IP address the system
6 * says he comes from and choosing authentication method based on it).
8 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
9 * Portions Copyright (c) 1994, Regents of the University of California
13 * src/backend/libpq/hba.c
15 *-------------------------------------------------------------------------
22 #include <sys/param.h>
23 #include <sys/socket.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
28 #include "catalog/pg_collation.h"
30 #include "libpq/libpq.h"
31 #include "postmaster/postmaster.h"
32 #include "regex/regex.h"
33 #include "replication/walsender.h"
34 #include "storage/fd.h"
35 #include "utils/acl.h"
36 #include "utils/guc.h"
37 #include "utils/lsyscache.h"
38 #include "utils/memutils.h"
41 #define atooid(x) ((Oid) strtoul((x), NULL, 10))
42 #define atoxid(x) ((TransactionId) strtoul((x), NULL, 10))
46 /* callback data for check_network_callback */
47 typedef struct check_network_data
49 IPCompareMethod method; /* test method */
50 SockAddr *raddr; /* client's actual address */
51 bool result; /* set to true if match */
55 #define token_is_keyword(t, k) (!t->quoted && strcmp(t->string, k) == 0)
56 #define token_matches(t, k) (strcmp(t->string, k) == 0)
59 * A single string token lexed from the HBA config file, together with whether
60 * the token had been quoted.
62 typedef struct HbaToken
69 * pre-parsed content of HBA config file: list of HbaLine structs.
70 * parsed_hba_context is the memory context where it lives.
72 static List *parsed_hba_lines = NIL;
73 static MemoryContext parsed_hba_context = NULL;
76 * These variables hold the pre-parsed contents of the ident usermap
77 * configuration file. ident_lines is a triple-nested list of lines, fields
78 * and tokens, as returned by tokenize_file. There will be one line in
79 * ident_lines for each (non-empty, non-comment) line of the file. Note there
80 * will always be at least one field, since blank lines are not entered in the
81 * data structure. ident_line_nums is an integer list containing the actual
82 * line number for each line represented in ident_lines. ident_context is
83 * the memory context holding all this.
85 static List *ident_lines = NIL;
86 static List *ident_line_nums = NIL;
87 static MemoryContext ident_context = NULL;
90 static MemoryContext tokenize_file(const char *filename, FILE *file,
91 List **lines, List **line_nums);
92 static List *tokenize_inc_file(List *tokens, const char *outer_filename,
93 const char *inc_filename);
94 static bool parse_hba_auth_opt(char *name, char *val, HbaLine *hbaline,
98 * isblank() exists in the ISO C99 spec, but it's not very portable yet,
99 * so provide our own version.
102 pg_isblank(const char c)
104 return c == ' ' || c == '\t' || c == '\r';
109 * Grab one token out of fp. Tokens are strings of non-blank
110 * characters bounded by blank characters, commas, beginning of line, and
111 * end of line. Blank means space or tab. Tokens can be delimited by
112 * double quotes (this allows the inclusion of blanks, but not newlines).
114 * The token, if any, is returned at *buf (a buffer of size bufsz).
115 * Also, we set *initial_quote to indicate whether there was quoting before
116 * the first character. (We use that to prevent "@x" from being treated
117 * as a file inclusion request. Note that @"x" should be so treated;
118 * we want to allow that to support embedded spaces in file paths.)
119 * We set *terminating_comma to indicate whether the token is terminated by a
120 * comma (which is not returned.)
122 * If successful: store null-terminated token at *buf and return TRUE.
123 * If no more tokens on line: set *buf = '\0' and return FALSE.
125 * Leave file positioned at the character immediately after the token or EOF,
126 * whichever comes first. If no more tokens on line, position the file to the
127 * beginning of the next line or EOF, whichever comes first.
132 next_token(FILE *fp, char *buf, int bufsz, bool *initial_quote,
133 bool *terminating_comma)
136 char *start_buf = buf;
137 char *end_buf = buf + (bufsz - 2);
138 bool in_quote = false;
139 bool was_quote = false;
140 bool saw_quote = false;
142 /* end_buf reserves two bytes to ensure we can append \n and \0 */
143 Assert(end_buf > start_buf);
145 *initial_quote = false;
146 *terminating_comma = false;
148 /* Move over initial whitespace and commas */
149 while ((c = getc(fp)) != EOF && (pg_isblank(c) || c == ','))
152 if (c == EOF || c == '\n')
159 * Build a token in buf of next characters up to EOF, EOL, unquoted comma,
160 * or unquoted whitespace.
162 while (c != EOF && c != '\n' &&
163 (!pg_isblank(c) || in_quote))
165 /* skip comments to EOL */
166 if (c == '#' && !in_quote)
168 while ((c = getc(fp)) != EOF && c != '\n')
170 /* If only comment, consume EOL too; return EOL */
171 if (c != EOF && buf == start_buf)
180 (errcode(ERRCODE_CONFIG_FILE_ERROR),
181 errmsg("authentication file token too long, skipping: \"%s\"",
183 /* Discard remainder of line */
184 while ((c = getc(fp)) != EOF && c != '\n')
189 /* we do not pass back the comma in the token */
190 if (c == ',' && !in_quote)
192 *terminating_comma = true;
196 if (c != '"' || was_quote)
199 /* Literal double-quote is two double-quotes */
200 if (in_quote && c == '"')
201 was_quote = !was_quote;
207 in_quote = !in_quote;
209 if (buf == start_buf)
210 *initial_quote = true;
217 * Put back the char right after the token (critical in case it is EOL,
218 * since we need to detect end-of-line at next call).
225 return (saw_quote || buf > start_buf);
229 make_hba_token(char *token, bool quoted)
234 toklen = strlen(token);
235 hbatoken = (HbaToken *) palloc(sizeof(HbaToken) + toklen + 1);
236 hbatoken->string = (char *) hbatoken + sizeof(HbaToken);
237 hbatoken->quoted = quoted;
238 memcpy(hbatoken->string, token, toklen + 1);
244 * Copy a HbaToken struct into freshly palloc'd memory.
247 copy_hba_token(HbaToken *in)
249 HbaToken *out = make_hba_token(in->string, in->quoted);
256 * Tokenize one HBA field from a file, handling file inclusion and comma lists.
258 * The result is a List of HbaToken structs for each individual token,
259 * or NIL if we reached EOL.
262 next_field_expand(const char *filename, FILE *file)
271 if (!next_token(file, buf, sizeof(buf), &initial_quote, &trailing_comma))
274 /* Is this referencing a file? */
275 if (!initial_quote && buf[0] == '@' && buf[1] != '\0')
276 tokens = tokenize_inc_file(tokens, filename, buf + 1);
278 tokens = lappend(tokens, make_hba_token(buf, initial_quote));
279 } while (trailing_comma);
286 * Expand a file included from another file into an hba "field"
288 * Opens and tokenises a file included from another HBA config file with @,
289 * and returns all values found therein as a flat list of HbaTokens. If a
290 * @-token is found, recursively expand it. The given token list is used as
291 * initial contents of list (so foo,bar,@baz does what you expect).
294 tokenize_inc_file(List *tokens,
295 const char *outer_filename,
296 const char *inc_filename)
303 MemoryContext linecxt;
305 if (is_absolute_path(inc_filename))
307 /* absolute path is taken as-is */
308 inc_fullname = pstrdup(inc_filename);
312 /* relative path is relative to dir of calling file */
313 inc_fullname = (char *) palloc(strlen(outer_filename) + 1 +
314 strlen(inc_filename) + 1);
315 strcpy(inc_fullname, outer_filename);
316 get_parent_directory(inc_fullname);
317 join_path_components(inc_fullname, inc_fullname, inc_filename);
318 canonicalize_path(inc_fullname);
321 inc_file = AllocateFile(inc_fullname, "r");
322 if (inc_file == NULL)
325 (errcode_for_file_access(),
326 errmsg("could not open secondary authentication file \"@%s\" as \"%s\": %m",
327 inc_filename, inc_fullname)));
332 /* There is possible recursion here if the file contains @ */
333 linecxt = tokenize_file(inc_fullname, inc_file, &inc_lines, &inc_line_nums);
338 foreach(inc_line, inc_lines)
340 List *inc_fields = lfirst(inc_line);
343 foreach(inc_field, inc_fields)
345 List *inc_tokens = lfirst(inc_field);
348 foreach(inc_token, inc_tokens)
350 HbaToken *token = lfirst(inc_token);
352 tokens = lappend(tokens, copy_hba_token(token));
357 MemoryContextDelete(linecxt);
362 * Tokenize the given file, storing the resulting data into two Lists: a
363 * List of lines, and a List of line numbers.
365 * The list of lines is a triple-nested List structure. Each line is a List of
366 * fields, and each field is a List of HbaTokens.
368 * filename must be the absolute path to the target file.
370 * Return value is a memory context which contains all memory allocated by
374 tokenize_file(const char *filename, FILE *file,
375 List **lines, List **line_nums)
377 List *current_line = NIL;
378 List *current_field = NIL;
380 MemoryContext linecxt;
381 MemoryContext oldcxt;
383 linecxt = AllocSetContextCreate(TopMemoryContext,
385 ALLOCSET_DEFAULT_MINSIZE,
386 ALLOCSET_DEFAULT_INITSIZE,
387 ALLOCSET_DEFAULT_MAXSIZE);
388 oldcxt = MemoryContextSwitchTo(linecxt);
390 *lines = *line_nums = NIL;
392 while (!feof(file) && !ferror(file))
394 current_field = next_field_expand(filename, file);
396 /* add tokens to list, unless we are at EOL or comment start */
397 if (list_length(current_field) > 0)
399 if (current_line == NIL)
401 /* make a new line List, record its line number */
402 current_line = lappend(current_line, current_field);
403 *lines = lappend(*lines, current_line);
404 *line_nums = lappend_int(*line_nums, line_number);
408 /* append tokens to current line's list */
409 current_line = lappend(current_line, current_field);
414 /* we are at real or logical EOL, so force a new line List */
420 MemoryContextSwitchTo(oldcxt);
427 * Does user belong to role?
429 * userid is the OID of the role given as the attempted login identifier.
430 * We check to see if it is a member of the specified role name.
433 is_member(Oid userid, const char *role)
437 if (!OidIsValid(userid))
438 return false; /* if user not exist, say "no" */
440 roleid = get_role_oid(role, true);
442 if (!OidIsValid(roleid))
443 return false; /* if target role not exist, say "no" */
446 * See if user is directly or indirectly a member of role.
447 * For this purpose, a superuser is not considered to be automatically
448 * a member of the role, so group auth only applies to explicit
451 return is_member_of_role_nosuper(userid, roleid);
455 * Check HbaToken list for a match to role, allowing group names.
458 check_role(const char *role, Oid roleid, List *tokens)
463 foreach(cell, tokens)
466 if (!tok->quoted && tok->string[0] == '+')
468 if (is_member(roleid, tok->string + 1))
471 else if (token_matches(tok, role) ||
472 token_is_keyword(tok, "all"))
479 * Check to see if db/role combination matches HbaToken list.
482 check_db(const char *dbname, const char *role, Oid roleid, List *tokens)
487 foreach(cell, tokens)
492 /* walsender connections can only match replication keyword */
493 if (token_is_keyword(tok, "replication"))
496 else if (token_is_keyword(tok, "all"))
498 else if (token_is_keyword(tok, "sameuser"))
500 if (strcmp(dbname, role) == 0)
503 else if (token_is_keyword(tok, "samegroup") ||
504 token_is_keyword(tok, "samerole"))
506 if (is_member(roleid, dbname))
509 else if (token_is_keyword(tok, "replication"))
510 continue; /* never match this if not walsender */
511 else if (token_matches(tok, dbname))
518 ipv4eq(struct sockaddr_in * a, struct sockaddr_in * b)
520 return (a->sin_addr.s_addr == b->sin_addr.s_addr);
526 ipv6eq(struct sockaddr_in6 * a, struct sockaddr_in6 * b)
530 for (i = 0; i < 16; i++)
531 if (a->sin6_addr.s6_addr[i] != b->sin6_addr.s6_addr[i])
536 #endif /* HAVE_IPV6 */
539 * Check whether host name matches pattern.
542 hostname_match(const char *pattern, const char *actual_hostname)
544 if (pattern[0] == '.') /* suffix match */
546 size_t plen = strlen(pattern);
547 size_t hlen = strlen(actual_hostname);
552 return (pg_strcasecmp(pattern, actual_hostname + (hlen - plen)) == 0);
555 return (pg_strcasecmp(pattern, actual_hostname) == 0);
559 * Check to see if a connecting IP matches a given host name.
562 check_hostname(hbaPort *port, const char *hostname)
564 struct addrinfo *gai_result,
569 /* Lookup remote host name if not already done */
570 if (!port->remote_hostname)
572 char remote_hostname[NI_MAXHOST];
574 if (pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
575 remote_hostname, sizeof(remote_hostname),
580 port->remote_hostname = pstrdup(remote_hostname);
583 if (!hostname_match(hostname, port->remote_hostname))
586 /* Lookup IP from host name and check against original IP */
588 if (port->remote_hostname_resolv == +1)
590 if (port->remote_hostname_resolv == -1)
593 ret = getaddrinfo(port->remote_hostname, NULL, NULL, &gai_result);
596 (errmsg("could not translate host name \"%s\" to address: %s",
597 port->remote_hostname, gai_strerror(ret))));
600 for (gai = gai_result; gai; gai = gai->ai_next)
602 if (gai->ai_addr->sa_family == port->raddr.addr.ss_family)
604 if (gai->ai_addr->sa_family == AF_INET)
606 if (ipv4eq((struct sockaddr_in *) gai->ai_addr,
607 (struct sockaddr_in *) & port->raddr.addr))
614 else if (gai->ai_addr->sa_family == AF_INET6)
616 if (ipv6eq((struct sockaddr_in6 *) gai->ai_addr,
617 (struct sockaddr_in6 *) & port->raddr.addr))
628 freeaddrinfo(gai_result);
631 elog(DEBUG2, "pg_hba.conf host name \"%s\" rejected because address resolution did not return a match with IP address of client",
634 port->remote_hostname_resolv = found ? +1 : -1;
640 * Check to see if a connecting IP matches the given address and netmask.
643 check_ip(SockAddr *raddr, struct sockaddr * addr, struct sockaddr * mask)
645 if (raddr->addr.ss_family == addr->sa_family)
647 /* Same address family */
648 if (!pg_range_sockaddr(&raddr->addr,
649 (struct sockaddr_storage *) addr,
650 (struct sockaddr_storage *) mask))
654 else if (addr->sa_family == AF_INET &&
655 raddr->addr.ss_family == AF_INET6)
658 * If we're connected on IPv6 but the file specifies an IPv4 address
659 * to match against, promote the latter to an IPv6 address before
660 * trying to match the client's address.
662 struct sockaddr_storage addrcopy,
665 memcpy(&addrcopy, &addr, sizeof(addrcopy));
666 memcpy(&maskcopy, &mask, sizeof(maskcopy));
667 pg_promote_v4_to_v6_addr(&addrcopy);
668 pg_promote_v4_to_v6_mask(&maskcopy);
670 if (!pg_range_sockaddr(&raddr->addr, &addrcopy, &maskcopy))
673 #endif /* HAVE_IPV6 */
676 /* Wrong address family, no IPV6 */
684 * pg_foreach_ifaddr callback: does client addr match this machine interface?
687 check_network_callback(struct sockaddr * addr, struct sockaddr * netmask,
690 check_network_data *cn = (check_network_data *) cb_data;
691 struct sockaddr_storage mask;
693 /* Already found a match? */
697 if (cn->method == ipCmpSameHost)
699 /* Make an all-ones netmask of appropriate length for family */
700 pg_sockaddr_cidr_mask(&mask, NULL, addr->sa_family);
701 cn->result = check_ip(cn->raddr, addr, (struct sockaddr *) & mask);
705 /* Use the netmask of the interface itself */
706 cn->result = check_ip(cn->raddr, addr, netmask);
711 * Use pg_foreach_ifaddr to check a samehost or samenet match
714 check_same_host_or_net(SockAddr *raddr, IPCompareMethod method)
716 check_network_data cn;
723 if (pg_foreach_ifaddr(check_network_callback, &cn) < 0)
725 elog(LOG, "error enumerating network interfaces: %m");
734 * Macros used to check and report on invalid configuration options.
735 * INVALID_AUTH_OPTION = reports when an option is specified for a method where it's
737 * REQUIRE_AUTH_OPTION = same as INVALID_AUTH_OPTION, except it also checks if the
738 * method is actually the one specified. Used as a shortcut when
739 * the option is only valid for one authentication method.
740 * MANDATORY_AUTH_ARG = check if a required option is set for an authentication method,
741 * reporting error if it's not.
743 #define INVALID_AUTH_OPTION(optname, validmethods) do {\
745 (errcode(ERRCODE_CONFIG_FILE_ERROR), \
746 /* translator: the second %s is a list of auth methods */ \
747 errmsg("authentication option \"%s\" is only valid for authentication methods %s", \
748 optname, _(validmethods)), \
749 errcontext("line %d of configuration file \"%s\"", \
750 line_num, HbaFileName))); \
754 #define REQUIRE_AUTH_OPTION(methodval, optname, validmethods) do {\
755 if (hbaline->auth_method != methodval) \
756 INVALID_AUTH_OPTION(optname, validmethods); \
759 #define MANDATORY_AUTH_ARG(argvar, argname, authname) do {\
760 if (argvar == NULL) {\
762 (errcode(ERRCODE_CONFIG_FILE_ERROR), \
763 errmsg("authentication method \"%s\" requires argument \"%s\" to be set", \
764 authname, argname), \
765 errcontext("line %d of configuration file \"%s\"", \
766 line_num, HbaFileName))); \
772 * IDENT_FIELD_ABSENT:
773 * Throw an error and exit the function if the given ident field ListCell is
777 * Throw an error and exit the function if the given ident token List has more
780 #define IDENT_FIELD_ABSENT(field) do {\
783 (errcode(ERRCODE_CONFIG_FILE_ERROR), \
784 errmsg("missing entry in file \"%s\" at end of line %d", \
785 IdentFileName, line_number))); \
791 #define IDENT_MULTI_VALUE(tokens) do {\
792 if (tokens->length > 1) { \
794 (errcode(ERRCODE_CONFIG_FILE_ERROR), \
795 errmsg("multiple values in ident field"), \
796 errcontext("line %d of configuration file \"%s\"", \
797 line_number, IdentFileName))); \
805 * Parse one tokenised line from the hba config file and store the result in a
806 * HbaLine structure, or NULL if parsing fails.
808 * The tokenised line is a List of fields, each field being a List of
811 * Note: this function leaks memory when an error occurs. Caller is expected
812 * to have set a memory context that will be reset if this function returns
816 parse_hba_line(List *line, int line_num)
819 struct addrinfo *gai_result;
820 struct addrinfo hints;
830 parsedline = palloc0(sizeof(HbaLine));
831 parsedline->linenumber = line_num;
833 /* Check the record type. */
834 field = list_head(line);
835 tokens = lfirst(field);
836 if (tokens->length > 1)
839 (errcode(ERRCODE_CONFIG_FILE_ERROR),
840 errmsg("multiple values specified for connection type"),
841 errhint("Specify exactly one connection type per line."),
842 errcontext("line %d of configuration file \"%s\"",
843 line_num, HbaFileName)));
846 token = linitial(tokens);
847 if (strcmp(token->string, "local") == 0)
849 #ifdef HAVE_UNIX_SOCKETS
850 parsedline->conntype = ctLocal;
853 (errcode(ERRCODE_CONFIG_FILE_ERROR),
854 errmsg("local connections are not supported by this build"),
855 errcontext("line %d of configuration file \"%s\"",
856 line_num, HbaFileName)));
860 else if (strcmp(token->string, "host") == 0 ||
861 strcmp(token->string, "hostssl") == 0 ||
862 strcmp(token->string, "hostnossl") == 0)
865 if (token->string[4] == 's') /* "hostssl" */
867 /* SSL support must be actually active, else complain */
870 parsedline->conntype = ctHostSSL;
874 (errcode(ERRCODE_CONFIG_FILE_ERROR),
875 errmsg("hostssl requires SSL to be turned on"),
876 errhint("Set ssl = on in postgresql.conf."),
877 errcontext("line %d of configuration file \"%s\"",
878 line_num, HbaFileName)));
883 (errcode(ERRCODE_CONFIG_FILE_ERROR),
884 errmsg("hostssl is not supported by this build"),
885 errhint("Compile with --with-openssl to use SSL connections."),
886 errcontext("line %d of configuration file \"%s\"",
887 line_num, HbaFileName)));
892 else if (token->string[4] == 'n') /* "hostnossl" */
894 parsedline->conntype = ctHostNoSSL;
899 /* "host", or "hostnossl" and SSL support not built in */
900 parsedline->conntype = ctHost;
906 (errcode(ERRCODE_CONFIG_FILE_ERROR),
907 errmsg("invalid connection type \"%s\"",
909 errcontext("line %d of configuration file \"%s\"",
910 line_num, HbaFileName)));
914 /* Get the databases. */
915 field = lnext(field);
919 (errcode(ERRCODE_CONFIG_FILE_ERROR),
920 errmsg("end-of-line before database specification"),
921 errcontext("line %d of configuration file \"%s\"",
922 line_num, HbaFileName)));
925 parsedline->databases = NIL;
926 tokens = lfirst(field);
927 foreach(tokencell, tokens)
929 parsedline->databases = lappend(parsedline->databases,
930 copy_hba_token(lfirst(tokencell)));
934 field = lnext(field);
938 (errcode(ERRCODE_CONFIG_FILE_ERROR),
939 errmsg("end-of-line before role specification"),
940 errcontext("line %d of configuration file \"%s\"",
941 line_num, HbaFileName)));
944 parsedline->roles = NIL;
945 tokens = lfirst(field);
946 foreach(tokencell, tokens)
948 parsedline->roles = lappend(parsedline->roles,
949 copy_hba_token(lfirst(tokencell)));
952 if (parsedline->conntype != ctLocal)
954 /* Read the IP address field. (with or without CIDR netmask) */
955 field = lnext(field);
959 (errcode(ERRCODE_CONFIG_FILE_ERROR),
960 errmsg("end-of-line before IP address specification"),
961 errcontext("line %d of configuration file \"%s\"",
962 line_num, HbaFileName)));
965 tokens = lfirst(field);
966 if (tokens->length > 1)
969 (errcode(ERRCODE_CONFIG_FILE_ERROR),
970 errmsg("multiple values specified for host address"),
971 errhint("Specify one address range per line."),
972 errcontext("line %d of configuration file \"%s\"",
973 line_num, HbaFileName)));
976 token = linitial(tokens);
978 if (token_is_keyword(token, "all"))
980 parsedline->ip_cmp_method = ipCmpAll;
982 else if (token_is_keyword(token, "samehost"))
984 /* Any IP on this host is allowed to connect */
985 parsedline->ip_cmp_method = ipCmpSameHost;
987 else if (token_is_keyword(token, "samenet"))
989 /* Any IP on the host's subnets is allowed to connect */
990 parsedline->ip_cmp_method = ipCmpSameNet;
994 /* IP and netmask are specified */
995 parsedline->ip_cmp_method = ipCmpMask;
997 /* need a modifiable copy of token */
998 str = pstrdup(token->string);
1000 /* Check if it has a CIDR suffix and if so isolate it */
1001 cidr_slash = strchr(str, '/');
1005 /* Get the IP address either way */
1006 hints.ai_flags = AI_NUMERICHOST;
1007 hints.ai_family = PF_UNSPEC;
1008 hints.ai_socktype = 0;
1009 hints.ai_protocol = 0;
1010 hints.ai_addrlen = 0;
1011 hints.ai_canonname = NULL;
1012 hints.ai_addr = NULL;
1013 hints.ai_next = NULL;
1015 ret = pg_getaddrinfo_all(str, NULL, &hints, &gai_result);
1016 if (ret == 0 && gai_result)
1017 memcpy(&parsedline->addr, gai_result->ai_addr,
1018 gai_result->ai_addrlen);
1019 else if (ret == EAI_NONAME)
1020 parsedline->hostname = str;
1024 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1025 errmsg("invalid IP address \"%s\": %s",
1026 str, gai_strerror(ret)),
1027 errcontext("line %d of configuration file \"%s\"",
1028 line_num, HbaFileName)));
1030 pg_freeaddrinfo_all(hints.ai_family, gai_result);
1034 pg_freeaddrinfo_all(hints.ai_family, gai_result);
1036 /* Get the netmask */
1039 if (parsedline->hostname)
1042 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1043 errmsg("specifying both host name and CIDR mask is invalid: \"%s\"",
1045 errcontext("line %d of configuration file \"%s\"",
1046 line_num, HbaFileName)));
1050 if (pg_sockaddr_cidr_mask(&parsedline->mask, cidr_slash + 1,
1051 parsedline->addr.ss_family) < 0)
1054 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1055 errmsg("invalid CIDR mask in address \"%s\"",
1057 errcontext("line %d of configuration file \"%s\"",
1058 line_num, HbaFileName)));
1063 else if (!parsedline->hostname)
1065 /* Read the mask field. */
1067 field = lnext(field);
1071 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1072 errmsg("end-of-line before netmask specification"),
1073 errhint("Specify an address range in CIDR notation, or provide a separate netmask."),
1074 errcontext("line %d of configuration file \"%s\"",
1075 line_num, HbaFileName)));
1078 tokens = lfirst(field);
1079 if (tokens->length > 1)
1082 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1083 errmsg("multiple values specified for netmask"),
1084 errcontext("line %d of configuration file \"%s\"",
1085 line_num, HbaFileName)));
1088 token = linitial(tokens);
1090 ret = pg_getaddrinfo_all(token->string, NULL,
1091 &hints, &gai_result);
1092 if (ret || !gai_result)
1095 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1096 errmsg("invalid IP mask \"%s\": %s",
1097 token->string, gai_strerror(ret)),
1098 errcontext("line %d of configuration file \"%s\"",
1099 line_num, HbaFileName)));
1101 pg_freeaddrinfo_all(hints.ai_family, gai_result);
1105 memcpy(&parsedline->mask, gai_result->ai_addr,
1106 gai_result->ai_addrlen);
1107 pg_freeaddrinfo_all(hints.ai_family, gai_result);
1109 if (parsedline->addr.ss_family != parsedline->mask.ss_family)
1112 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1113 errmsg("IP address and mask do not match"),
1114 errcontext("line %d of configuration file \"%s\"",
1115 line_num, HbaFileName)));
1122 /* Get the authentication method */
1123 field = lnext(field);
1127 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1128 errmsg("end-of-line before authentication method"),
1129 errcontext("line %d of configuration file \"%s\"",
1130 line_num, HbaFileName)));
1133 tokens = lfirst(field);
1134 if (tokens->length > 1)
1137 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1138 errmsg("multiple values specified for authentication type"),
1139 errhint("Specify exactly one authentication type per line."),
1140 errcontext("line %d of configuration file \"%s\"",
1141 line_num, HbaFileName)));
1144 token = linitial(tokens);
1147 if (strcmp(token->string, "trust") == 0)
1148 parsedline->auth_method = uaTrust;
1149 else if (strcmp(token->string, "ident") == 0)
1150 parsedline->auth_method = uaIdent;
1151 else if (strcmp(token->string, "peer") == 0)
1152 parsedline->auth_method = uaPeer;
1153 else if (strcmp(token->string, "password") == 0)
1154 parsedline->auth_method = uaPassword;
1155 else if (strcmp(token->string, "krb5") == 0)
1157 parsedline->auth_method = uaKrb5;
1161 else if (strcmp(token->string, "gss") == 0)
1163 parsedline->auth_method = uaGSS;
1167 else if (strcmp(token->string, "sspi") == 0)
1169 parsedline->auth_method = uaSSPI;
1173 else if (strcmp(token->string, "reject") == 0)
1174 parsedline->auth_method = uaReject;
1175 else if (strcmp(token->string, "md5") == 0)
1177 if (Db_user_namespace)
1180 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1181 errmsg("MD5 authentication is not supported when \"db_user_namespace\" is enabled"),
1182 errcontext("line %d of configuration file \"%s\"",
1183 line_num, HbaFileName)));
1186 parsedline->auth_method = uaMD5;
1188 else if (strcmp(token->string, "pam") == 0)
1190 parsedline->auth_method = uaPAM;
1194 else if (strcmp(token->string, "ldap") == 0)
1196 parsedline->auth_method = uaLDAP;
1200 else if (strcmp(token->string, "cert") == 0)
1202 parsedline->auth_method = uaCert;
1206 else if (strcmp(token->string, "radius") == 0)
1207 parsedline->auth_method = uaRADIUS;
1211 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1212 errmsg("invalid authentication method \"%s\"",
1214 errcontext("line %d of configuration file \"%s\"",
1215 line_num, HbaFileName)));
1222 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1223 errmsg("invalid authentication method \"%s\": not supported by this build",
1225 errcontext("line %d of configuration file \"%s\"",
1226 line_num, HbaFileName)));
1231 * XXX: When using ident on local connections, change it to peer, for
1232 * backwards compatibility.
1234 if (parsedline->conntype == ctLocal &&
1235 parsedline->auth_method == uaIdent)
1236 parsedline->auth_method = uaPeer;
1238 /* Invalid authentication combinations */
1239 if (parsedline->conntype == ctLocal &&
1240 parsedline->auth_method == uaKrb5)
1243 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1244 errmsg("krb5 authentication is not supported on local sockets"),
1245 errcontext("line %d of configuration file \"%s\"",
1246 line_num, HbaFileName)));
1250 if (parsedline->conntype == ctLocal &&
1251 parsedline->auth_method == uaGSS)
1254 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1255 errmsg("gssapi authentication is not supported on local sockets"),
1256 errcontext("line %d of configuration file \"%s\"",
1257 line_num, HbaFileName)));
1261 if (parsedline->conntype != ctLocal &&
1262 parsedline->auth_method == uaPeer)
1265 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1266 errmsg("peer authentication is only supported on local sockets"),
1267 errcontext("line %d of configuration file \"%s\"",
1268 line_num, HbaFileName)));
1273 * SSPI authentication can never be enabled on ctLocal connections,
1274 * because it's only supported on Windows, where ctLocal isn't supported.
1278 if (parsedline->conntype != ctHostSSL &&
1279 parsedline->auth_method == uaCert)
1282 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1283 errmsg("cert authentication is only supported on hostssl connections"),
1284 errcontext("line %d of configuration file \"%s\"",
1285 line_num, HbaFileName)));
1289 /* Parse remaining arguments */
1290 while ((field = lnext(field)) != NULL)
1292 tokens = lfirst(field);
1293 foreach(tokencell, tokens)
1296 token = lfirst(tokencell);
1298 str = pstrdup(token->string);
1299 val = strchr(str, '=');
1303 * Got something that's not a name=value pair.
1306 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1307 errmsg("authentication option not in name=value format: %s", token->string),
1308 errcontext("line %d of configuration file \"%s\"",
1309 line_num, HbaFileName)));
1313 *val++ = '\0'; /* str now holds "name", val holds "value" */
1314 if (!parse_hba_auth_opt(str, val, parsedline, line_num))
1315 /* parse_hba_auth_opt already logged the error message */
1322 * Check if the selected authentication method has any mandatory arguments
1325 if (parsedline->auth_method == uaLDAP)
1327 MANDATORY_AUTH_ARG(parsedline->ldapserver, "ldapserver", "ldap");
1330 * LDAP can operate in two modes: either with a direct bind, using
1331 * ldapprefix and ldapsuffix, or using a search+bind, using
1332 * ldapbasedn, ldapbinddn, ldapbindpasswd and ldapsearchattribute.
1333 * Disallow mixing these parameters.
1335 if (parsedline->ldapprefix || parsedline->ldapsuffix)
1337 if (parsedline->ldapbasedn ||
1338 parsedline->ldapbinddn ||
1339 parsedline->ldapbindpasswd ||
1340 parsedline->ldapsearchattribute)
1343 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1344 errmsg("cannot use ldapbasedn, ldapbinddn, ldapbindpasswd, or ldapsearchattribute together with ldapprefix"),
1345 errcontext("line %d of configuration file \"%s\"",
1346 line_num, HbaFileName)));
1350 else if (!parsedline->ldapbasedn)
1353 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1354 errmsg("authentication method \"ldap\" requires argument \"ldapbasedn\", \"ldapprefix\", or \"ldapsuffix\" to be set"),
1355 errcontext("line %d of configuration file \"%s\"",
1356 line_num, HbaFileName)));
1361 if (parsedline->auth_method == uaRADIUS)
1363 MANDATORY_AUTH_ARG(parsedline->radiusserver, "radiusserver", "radius");
1364 MANDATORY_AUTH_ARG(parsedline->radiussecret, "radiussecret", "radius");
1368 * Enforce any parameters implied by other settings.
1370 if (parsedline->auth_method == uaCert)
1372 parsedline->clientcert = true;
1379 * Parse one name-value pair as an authentication option into the given
1380 * HbaLine. Return true if we successfully parse the option, false if we
1381 * encounter an error.
1384 parse_hba_auth_opt(char *name, char *val, HbaLine *hbaline, int line_num)
1386 if (strcmp(name, "map") == 0)
1388 if (hbaline->auth_method != uaIdent &&
1389 hbaline->auth_method != uaPeer &&
1390 hbaline->auth_method != uaKrb5 &&
1391 hbaline->auth_method != uaGSS &&
1392 hbaline->auth_method != uaSSPI &&
1393 hbaline->auth_method != uaCert)
1394 INVALID_AUTH_OPTION("map", gettext_noop("ident, peer, krb5, gssapi, sspi, and cert"));
1395 hbaline->usermap = pstrdup(val);
1397 else if (strcmp(name, "clientcert") == 0)
1400 * Since we require ctHostSSL, this really can never happen
1401 * on non-SSL-enabled builds, so don't bother checking for
1404 if (hbaline->conntype != ctHostSSL)
1407 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1408 errmsg("clientcert can only be configured for \"hostssl\" rows"),
1409 errcontext("line %d of configuration file \"%s\"",
1410 line_num, HbaFileName)));
1413 if (strcmp(val, "1") == 0)
1415 if (!secure_loaded_verify_locations())
1418 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1419 errmsg("client certificates can only be checked if a root certificate store is available"),
1420 errhint("Make sure the configuration parameter \"ssl_ca_file\" is set."),
1421 errcontext("line %d of configuration file \"%s\"",
1422 line_num, HbaFileName)));
1425 hbaline->clientcert = true;
1429 if (hbaline->auth_method == uaCert)
1432 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1433 errmsg("clientcert can not be set to 0 when using \"cert\" authentication"),
1434 errcontext("line %d of configuration file \"%s\"",
1435 line_num, HbaFileName)));
1438 hbaline->clientcert = false;
1441 else if (strcmp(name, "pamservice") == 0)
1443 REQUIRE_AUTH_OPTION(uaPAM, "pamservice", "pam");
1444 hbaline->pamservice = pstrdup(val);
1446 else if (strcmp(name, "ldaptls") == 0)
1448 REQUIRE_AUTH_OPTION(uaLDAP, "ldaptls", "ldap");
1449 if (strcmp(val, "1") == 0)
1450 hbaline->ldaptls = true;
1452 hbaline->ldaptls = false;
1454 else if (strcmp(name, "ldapserver") == 0)
1456 REQUIRE_AUTH_OPTION(uaLDAP, "ldapserver", "ldap");
1457 hbaline->ldapserver = pstrdup(val);
1459 else if (strcmp(name, "ldapport") == 0)
1461 REQUIRE_AUTH_OPTION(uaLDAP, "ldapport", "ldap");
1462 hbaline->ldapport = atoi(val);
1463 if (hbaline->ldapport == 0)
1466 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1467 errmsg("invalid LDAP port number: \"%s\"", val),
1468 errcontext("line %d of configuration file \"%s\"",
1469 line_num, HbaFileName)));
1473 else if (strcmp(name, "ldapbinddn") == 0)
1475 REQUIRE_AUTH_OPTION(uaLDAP, "ldapbinddn", "ldap");
1476 hbaline->ldapbinddn = pstrdup(val);
1478 else if (strcmp(name, "ldapbindpasswd") == 0)
1480 REQUIRE_AUTH_OPTION(uaLDAP, "ldapbindpasswd", "ldap");
1481 hbaline->ldapbindpasswd = pstrdup(val);
1483 else if (strcmp(name, "ldapsearchattribute") == 0)
1485 REQUIRE_AUTH_OPTION(uaLDAP, "ldapsearchattribute", "ldap");
1486 hbaline->ldapsearchattribute = pstrdup(val);
1488 else if (strcmp(name, "ldapbasedn") == 0)
1490 REQUIRE_AUTH_OPTION(uaLDAP, "ldapbasedn", "ldap");
1491 hbaline->ldapbasedn = pstrdup(val);
1493 else if (strcmp(name, "ldapprefix") == 0)
1495 REQUIRE_AUTH_OPTION(uaLDAP, "ldapprefix", "ldap");
1496 hbaline->ldapprefix = pstrdup(val);
1498 else if (strcmp(name, "ldapsuffix") == 0)
1500 REQUIRE_AUTH_OPTION(uaLDAP, "ldapsuffix", "ldap");
1501 hbaline->ldapsuffix = pstrdup(val);
1503 else if (strcmp(name, "krb_server_hostname") == 0)
1505 REQUIRE_AUTH_OPTION(uaKrb5, "krb_server_hostname", "krb5");
1506 hbaline->krb_server_hostname = pstrdup(val);
1508 else if (strcmp(name, "krb_realm") == 0)
1510 if (hbaline->auth_method != uaKrb5 &&
1511 hbaline->auth_method != uaGSS &&
1512 hbaline->auth_method != uaSSPI)
1513 INVALID_AUTH_OPTION("krb_realm", gettext_noop("krb5, gssapi, and sspi"));
1514 hbaline->krb_realm = pstrdup(val);
1516 else if (strcmp(name, "include_realm") == 0)
1518 if (hbaline->auth_method != uaKrb5 &&
1519 hbaline->auth_method != uaGSS &&
1520 hbaline->auth_method != uaSSPI)
1521 INVALID_AUTH_OPTION("include_realm", gettext_noop("krb5, gssapi, and sspi"));
1522 if (strcmp(val, "1") == 0)
1523 hbaline->include_realm = true;
1525 hbaline->include_realm = false;
1527 else if (strcmp(name, "radiusserver") == 0)
1529 struct addrinfo *gai_result;
1530 struct addrinfo hints;
1533 REQUIRE_AUTH_OPTION(uaRADIUS, "radiusserver", "radius");
1535 MemSet(&hints, 0, sizeof(hints));
1536 hints.ai_socktype = SOCK_DGRAM;
1537 hints.ai_family = AF_UNSPEC;
1539 ret = pg_getaddrinfo_all(val, NULL, &hints, &gai_result);
1540 if (ret || !gai_result)
1543 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1544 errmsg("could not translate RADIUS server name \"%s\" to address: %s",
1545 val, gai_strerror(ret)),
1546 errcontext("line %d of configuration file \"%s\"",
1547 line_num, HbaFileName)));
1549 pg_freeaddrinfo_all(hints.ai_family, gai_result);
1552 pg_freeaddrinfo_all(hints.ai_family, gai_result);
1553 hbaline->radiusserver = pstrdup(val);
1555 else if (strcmp(name, "radiusport") == 0)
1557 REQUIRE_AUTH_OPTION(uaRADIUS, "radiusport", "radius");
1558 hbaline->radiusport = atoi(val);
1559 if (hbaline->radiusport == 0)
1562 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1563 errmsg("invalid RADIUS port number: \"%s\"", val),
1564 errcontext("line %d of configuration file \"%s\"",
1565 line_num, HbaFileName)));
1569 else if (strcmp(name, "radiussecret") == 0)
1571 REQUIRE_AUTH_OPTION(uaRADIUS, "radiussecret", "radius");
1572 hbaline->radiussecret = pstrdup(val);
1574 else if (strcmp(name, "radiusidentifier") == 0)
1576 REQUIRE_AUTH_OPTION(uaRADIUS, "radiusidentifier", "radius");
1577 hbaline->radiusidentifier = pstrdup(val);
1582 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1583 errmsg("unrecognized authentication option name: \"%s\"",
1585 errcontext("line %d of configuration file \"%s\"",
1586 line_num, HbaFileName)));
1593 * Scan the pre-parsed hba file, looking for a match to the port's connection
1597 check_hba(hbaPort *port)
1603 /* Get the target role's OID. Note we do not error out for bad role. */
1604 roleid = get_role_oid(port->user_name, true);
1606 foreach(line, parsed_hba_lines)
1608 hba = (HbaLine *) lfirst(line);
1610 /* Check connection type */
1611 if (hba->conntype == ctLocal)
1613 if (!IS_AF_UNIX(port->raddr.addr.ss_family))
1618 if (IS_AF_UNIX(port->raddr.addr.ss_family))
1621 /* Check SSL state */
1625 /* Connection is SSL, match both "host" and "hostssl" */
1626 if (hba->conntype == ctHostNoSSL)
1631 /* Connection is not SSL, match both "host" and "hostnossl" */
1632 if (hba->conntype == ctHostSSL)
1636 /* No SSL support, so reject "hostssl" lines */
1637 if (hba->conntype == ctHostSSL)
1641 /* Check IP address */
1642 switch (hba->ip_cmp_method)
1647 if (!check_hostname(port,
1653 if (!check_ip(&port->raddr,
1654 (struct sockaddr *) & hba->addr,
1655 (struct sockaddr *) & hba->mask))
1663 if (!check_same_host_or_net(&port->raddr,
1664 hba->ip_cmp_method))
1668 /* shouldn't get here, but deem it no-match if so */
1673 /* Check database and role */
1674 if (!check_db(port->database_name, port->user_name, roleid,
1678 if (!check_role(port->user_name, roleid, hba->roles))
1681 /* Found a record that matched! */
1686 /* If no matching entry was found, then implicitly reject. */
1687 hba = palloc0(sizeof(HbaLine));
1688 hba->auth_method = uaImplicitReject;
1693 * Read the config file and create a List of HbaLine records for the contents.
1695 * The configuration is read into a temporary list, and if any parse error
1696 * occurs the old list is kept in place and false is returned. Only if the
1697 * whole file parses OK is the list replaced, and the function returns true.
1699 * On a false result, caller will take care of reporting a FATAL error in case
1700 * this is the initial startup. If it happens on reload, we just keep running
1701 * with the old data.
1707 List *hba_lines = NIL;
1708 List *hba_line_nums = NIL;
1711 List *new_parsed_lines = NIL;
1713 MemoryContext linecxt;
1714 MemoryContext oldcxt;
1715 MemoryContext hbacxt;
1717 file = AllocateFile(HbaFileName, "r");
1721 (errcode_for_file_access(),
1722 errmsg("could not open configuration file \"%s\": %m",
1727 linecxt = tokenize_file(HbaFileName, file, &hba_lines, &hba_line_nums);
1730 /* Now parse all the lines */
1731 hbacxt = AllocSetContextCreate(TopMemoryContext,
1732 "hba parser context",
1733 ALLOCSET_DEFAULT_MINSIZE,
1734 ALLOCSET_DEFAULT_MINSIZE,
1735 ALLOCSET_DEFAULT_MAXSIZE);
1736 oldcxt = MemoryContextSwitchTo(hbacxt);
1737 forboth(line, hba_lines, line_num, hba_line_nums)
1741 if ((newline = parse_hba_line(lfirst(line), lfirst_int(line_num))) == NULL)
1744 * Parse error in the file, so indicate there's a problem. NB: a
1745 * problem in a line will free the memory for all previous lines as
1748 MemoryContextReset(hbacxt);
1749 new_parsed_lines = NIL;
1753 * Keep parsing the rest of the file so we can report errors on
1754 * more than the first row. Error has already been reported in the
1755 * parsing function, so no need to log it here.
1760 new_parsed_lines = lappend(new_parsed_lines, newline);
1764 * A valid HBA file must have at least one entry; else there's no way
1765 * to connect to the postmaster. But only complain about this if we
1766 * didn't already have parsing errors.
1768 if (ok && new_parsed_lines == NIL)
1771 (errcode(ERRCODE_CONFIG_FILE_ERROR),
1772 errmsg("configuration file \"%s\" contains no entries",
1777 /* Free tokenizer memory */
1778 MemoryContextDelete(linecxt);
1779 MemoryContextSwitchTo(oldcxt);
1783 /* File contained one or more errors, so bail out */
1784 MemoryContextDelete(hbacxt);
1788 /* Loaded new file successfully, replace the one we use */
1789 if (parsed_hba_context != NULL)
1790 MemoryContextDelete(parsed_hba_context);
1791 parsed_hba_context = hbacxt;
1792 parsed_hba_lines = new_parsed_lines;
1798 * Process one line from the ident config file.
1800 * Take the line and compare it to the needed map, pg_role and ident_user.
1801 * *found_p and *error_p are set according to our results.
1804 parse_ident_usermap(List *line, int line_number, const char *usermap_name,
1805 const char *pg_role, const char *ident_user,
1806 bool case_insensitive, bool *found_p, bool *error_p)
1813 char *file_ident_user;
1818 Assert(line != NIL);
1819 field = list_head(line);
1821 /* Get the map token (must exist) */
1822 tokens = lfirst(field);
1823 IDENT_MULTI_VALUE(tokens);
1824 token = linitial(tokens);
1825 file_map = token->string;
1827 /* Get the ident user token */
1828 field = lnext(field);
1829 IDENT_FIELD_ABSENT(field);
1830 tokens = lfirst(field);
1831 IDENT_MULTI_VALUE(tokens);
1832 token = linitial(tokens);
1833 file_ident_user = token->string;
1835 /* Get the PG rolename token */
1836 field = lnext(field);
1837 IDENT_FIELD_ABSENT(field);
1838 tokens = lfirst(field);
1839 IDENT_MULTI_VALUE(tokens);
1840 token = linitial(tokens);
1841 file_pgrole = token->string;
1843 if (strcmp(file_map, usermap_name) != 0)
1844 /* Line does not match the map name we're looking for, so just abort */
1848 if (file_ident_user[0] == '/')
1851 * When system username starts with a slash, treat it as a regular
1852 * expression. In this case, we process the system username as a
1853 * regular expression that returns exactly one match. This is replaced
1854 * for \1 in the database username string, if present.
1858 regmatch_t matches[2];
1862 char *regexp_pgrole;
1864 wstr = palloc((strlen(file_ident_user + 1) + 1) * sizeof(pg_wchar));
1865 wlen = pg_mb2wchar_with_len(file_ident_user + 1, wstr, strlen(file_ident_user + 1));
1868 * XXX: Major room for optimization: regexps could be compiled when
1869 * the file is loaded and then re-used in every connection.
1871 r = pg_regcomp(&re, wstr, wlen, REG_ADVANCED, C_COLLATION_OID);
1876 pg_regerror(r, &re, errstr, sizeof(errstr));
1878 (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
1879 errmsg("invalid regular expression \"%s\": %s",
1880 file_ident_user + 1, errstr)));
1888 wstr = palloc((strlen(ident_user) + 1) * sizeof(pg_wchar));
1889 wlen = pg_mb2wchar_with_len(ident_user, wstr, strlen(ident_user));
1891 r = pg_regexec(&re, wstr, wlen, 0, NULL, 2, matches, 0);
1896 if (r != REG_NOMATCH)
1898 /* REG_NOMATCH is not an error, everything else is */
1899 pg_regerror(r, &re, errstr, sizeof(errstr));
1901 (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
1902 errmsg("regular expression match for \"%s\" failed: %s",
1903 file_ident_user + 1, errstr)));
1913 if ((ofs = strstr(file_pgrole, "\\1")) != NULL)
1915 /* substitution of the first argument requested */
1916 if (matches[1].rm_so < 0)
1919 (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
1920 errmsg("regular expression \"%s\" has no subexpressions as requested by backreference in \"%s\"",
1921 file_ident_user + 1, file_pgrole)));
1928 * length: original length minus length of \1 plus length of match
1929 * plus null terminator
1931 regexp_pgrole = palloc0(strlen(file_pgrole) - 2 + (matches[1].rm_eo - matches[1].rm_so) + 1);
1932 strncpy(regexp_pgrole, file_pgrole, (ofs - file_pgrole));
1933 memcpy(regexp_pgrole + strlen(regexp_pgrole),
1934 ident_user + matches[1].rm_so,
1935 matches[1].rm_eo - matches[1].rm_so);
1936 strcat(regexp_pgrole, ofs + 2);
1940 /* no substitution, so copy the match */
1941 regexp_pgrole = pstrdup(file_pgrole);
1947 * now check if the username actually matched what the user is trying
1950 if (case_insensitive)
1952 if (pg_strcasecmp(regexp_pgrole, pg_role) == 0)
1957 if (strcmp(regexp_pgrole, pg_role) == 0)
1960 pfree(regexp_pgrole);
1966 /* Not regular expression, so make complete match */
1967 if (case_insensitive)
1969 if (pg_strcasecmp(file_pgrole, pg_role) == 0 &&
1970 pg_strcasecmp(file_ident_user, ident_user) == 0)
1975 if (strcmp(file_pgrole, pg_role) == 0 &&
1976 strcmp(file_ident_user, ident_user) == 0)
1985 * Scan the (pre-parsed) ident usermap file line by line, looking for a match
1987 * See if the user with ident username "auth_user" is allowed to act
1988 * as Postgres user "pg_role" according to usermap "usermap_name".
1990 * Special case: Usermap NULL, equivalent to what was previously called
1991 * "sameuser" or "samerole", means don't look in the usermap file.
1992 * That's an implied map wherein "pg_role" must be identical to
1993 * "auth_user" in order to be authorized.
1995 * Iff authorized, return STATUS_OK, otherwise return STATUS_ERROR.
1998 check_usermap(const char *usermap_name,
1999 const char *pg_role,
2000 const char *auth_user,
2001 bool case_insensitive)
2003 bool found_entry = false,
2006 if (usermap_name == NULL || usermap_name[0] == '\0')
2008 if (case_insensitive)
2010 if (pg_strcasecmp(pg_role, auth_user) == 0)
2015 if (strcmp(pg_role, auth_user) == 0)
2019 (errmsg("provided user name (%s) and authenticated user name (%s) do not match",
2020 pg_role, auth_user)));
2021 return STATUS_ERROR;
2025 ListCell *line_cell,
2028 forboth(line_cell, ident_lines, num_cell, ident_line_nums)
2030 parse_ident_usermap(lfirst(line_cell), lfirst_int(num_cell),
2031 usermap_name, pg_role, auth_user, case_insensitive,
2032 &found_entry, &error);
2033 if (found_entry || error)
2037 if (!found_entry && !error)
2040 (errmsg("no match in usermap \"%s\" for user \"%s\" authenticated as \"%s\"",
2041 usermap_name, pg_role, auth_user)));
2043 return found_entry ? STATUS_OK : STATUS_ERROR;
2048 * Read the ident config file and populate ident_lines and ident_line_nums.
2050 * Like parsed_hba_lines, ident_lines is a triple-nested List of lines, fields
2058 if (ident_context != NULL)
2060 MemoryContextDelete(ident_context);
2061 ident_context = NULL;
2064 file = AllocateFile(IdentFileName, "r");
2067 /* not fatal ... we just won't do any special ident maps */
2069 (errcode_for_file_access(),
2070 errmsg("could not open usermap file \"%s\": %m",
2075 ident_context = tokenize_file(IdentFileName, file, &ident_lines,
2084 * Determine what authentication method should be used when accessing database
2085 * "database" from frontend "raddr", user "user". Return the method and
2086 * an optional argument (stored in fields of *port), and STATUS_OK.
2088 * If the file does not contain any entry matching the request, we return
2089 * method = uaImplicitReject.
2092 hba_getauthmethod(hbaPort *port)