* wherein you authenticate a user by seeing what IP address the system
* says he comes from and possibly using ident).
*
- * $Id: hba.c,v 1.55 2001/02/10 02:31:26 tgl Exp $
+ * $Id: hba.c,v 1.56 2001/07/30 14:50:21 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "libpq/libpq.h"
#include "miscadmin.h"
+#include "nodes/pg_list.h"
#include "storage/fd.h"
#define IDENT_USERNAME_MAX 512
/* Max size of username ident server can return */
+static List *hba_lines = NULL; /* A list of lists: entry for every line,
+ * list of tokens on each line.
+ */
+
+static List *ident_lines = NULL;/* A list of lists: entry for every line,
+ * list of tokens on each line.
+ */
/* Some standard C libraries, including GNU, have an isblank() function.
Others, including Solaris, do not. So we have our own.
static bool
isblank(const char c)
{
- return c == ' ' || c == 9 /* tab */ ;
+ return c == ' ' || c == 0x09;/* tab */
}
+/*
+ * Grab one token out of fp. Tokens are strings of non-blank
+ * characters bounded by blank characters, beginning of line, and end
+ * of line. Blank means space or tab. Return the token as *buf.
+ * Leave file positioned to character immediately after the token or
+ * EOF, whichever comes first. If no more tokens on line, return null
+ * string as *buf and position file to beginning of next line or EOF,
+ * whichever comes first.
+ */
static void
next_token(FILE *fp, char *buf, const int bufsz)
{
-/*--------------------------------------------------------------------------
- Grab one token out of fp. Tokens are strings of non-blank
- characters bounded by blank characters, beginning of line, and end
- of line. Blank means space or tab. Return the token as *buf.
- Leave file positioned to character immediately after the token or
- EOF, whichever comes first. If no more tokens on line, return null
- string as *buf and position file to beginning of next line or EOF,
- whichever comes first.
---------------------------------------------------------------------------*/
int c;
char *eb = buf + (bufsz - 1);
/* Move over inital token-delimiting blanks */
- while (isblank(c = getc(fp)));
+ while (isblank(c = getc(fp)))
+ ;
if (c != '\n')
{
-
/*
* build a token in buf of next characters up to EOF, eol, or
* blank.
if (buf < eb)
*buf++ = c;
c = getc(fp);
-
- /*
- * Put back the char right after the token (putting back EOF
- * is ok)
- */
}
+ /*
+ * Put back the char right after the token (putting back EOF
+ * is ok)
+ */
ungetc(c, fp);
}
*buf = '\0';
}
-
static void
-read_through_eol(FILE *file)
+read_to_eol(FILE *file)
{
int c;
- do
- c = getc(file);
- while (c != '\n' && c != EOF);
+ while ((c = getc(file)) != '\n' && c != EOF)
+ ;
}
-
+/*
+ * Process the file line by line and create a list of list of tokens.
+ */
static void
-read_hba_entry2(FILE *file, UserAuth *userauth_p, char *auth_arg,
- bool *error_p)
+tokenize_file(FILE *file, List **lines)
{
-/*--------------------------------------------------------------------------
- Read from file FILE the rest of a host record, after the mask field,
- and return the interpretation of it as *userauth_p, auth_arg, and
- *error_p.
----------------------------------------------------------------------------*/
char buf[MAX_TOKEN];
+ List *next_line = NIL;
+ bool comment_found = false;
- /* Get authentication type token. */
- next_token(file, buf, sizeof(buf));
-
- if (strcmp(buf, "trust") == 0)
- *userauth_p = uaTrust;
- else if (strcmp(buf, "ident") == 0)
- *userauth_p = uaIdent;
- else if (strcmp(buf, "password") == 0)
- *userauth_p = uaPassword;
- else if (strcmp(buf, "krb4") == 0)
- *userauth_p = uaKrb4;
- else if (strcmp(buf, "krb5") == 0)
- *userauth_p = uaKrb5;
- else if (strcmp(buf, "reject") == 0)
- *userauth_p = uaReject;
- else if (strcmp(buf, "crypt") == 0)
- *userauth_p = uaCrypt;
- else
+ while (1)
{
- *error_p = true;
+ next_token(file, buf, sizeof(buf));
+ if (feof(file))
+ break;
+ /* trim off comment, even if inside a token */
+ if (strstr(buf,"#") != NULL)
+ {
+ *strstr(buf,"#") = '\0';
+ comment_found = true;
+ }
+
+ /* add token to list */
if (buf[0] != '\0')
- read_through_eol(file);
+ {
+ if (next_line == NIL)
+ {
+ /* make a new line List */
+ next_line = lcons(pstrdup(buf), NIL);
+ *lines = lappend(*lines, next_line);
+ }
+ else
+ /* append token to line */
+ next_line = lappend(next_line, pstrdup(buf));
+ }
+ else
+ /* force a new List line */
+ next_line = NIL;
+
+ if (comment_found)
+ {
+ /* Skip the rest of the line */
+ read_to_eol(file);
+ next_line = NIL;
+ comment_found = false;
+ }
+ }
+}
+
+
+/*
+ * Free memory used by lines/tokens
+ */
+static void free_lines(List **lines)
+{
+ if (*lines)
+ {
+ List *line, *token;
+
+ foreach(line, *lines)
+ {
+ foreach(token,lfirst(line))
+ pfree(lfirst(token));
+ freeList(lfirst(line));
+ }
+ freeList(*lines);
+ *lines = NULL;
+ }
+}
+
+
+/*
+ * Read from file FILE the rest of a host record, after the mask field,
+ * and return the interpretation of it as *userauth_p, auth_arg, and
+ * *error_p.
+ */
+static void
+parse_hba_auth(List *line, UserAuth *userauth_p, char *auth_arg,
+ bool *error_p)
+{
+ char *token = NULL;
+
+ if (!line)
+ *error_p = true;
+ else
+ {
+ /* Get authentication type token. */
+ token = lfirst(line);
+ if (strcmp(token, "trust") == 0)
+ *userauth_p = uaTrust;
+ else if (strcmp(token, "ident") == 0)
+ *userauth_p = uaIdent;
+ else if (strcmp(token, "password") == 0)
+ *userauth_p = uaPassword;
+ else if (strcmp(token, "krb4") == 0)
+ *userauth_p = uaKrb4;
+ else if (strcmp(token, "krb5") == 0)
+ *userauth_p = uaKrb5;
+ else if (strcmp(token, "reject") == 0)
+ *userauth_p = uaReject;
+ else if (strcmp(token, "crypt") == 0)
+ *userauth_p = uaCrypt;
+ else
+ *error_p = true;
}
if (!*error_p)
{
/* Get the authentication argument token, if any */
- next_token(file, buf, sizeof(buf));
- if (buf[0] == '\0')
+ line = lnext(line);
+ if (!line)
auth_arg[0] = '\0';
else
{
- StrNCpy(auth_arg, buf, MAX_AUTH_ARG - 1);
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
+ StrNCpy(auth_arg, token, MAX_AUTH_ARG - 1);
+ /* If there is more on the line, it is an error */
+ if (lnext(line))
*error_p = true;
- read_through_eol(file);
- }
}
}
}
-
+/*
+ * Process the non-comment lines in the config file.
+ *
+ * See if it applies to a connection to a host with IP address "*raddr"
+ * to a database named "*database". If so, return *found_p true
+ * and *userauth_p and *auth_arg as the values from the entry.
+ * If not, leave *found_p as it was. If the record has a syntax error,
+ * return *error_p true, after issuing a message to stderr. If no error,
+ * leave *error_p as it was.
+ */
static void
-process_hba_record(FILE *file, hbaPort *port, bool *matches_p, bool *error_p)
+parse_hba(List *line, hbaPort *port, bool *found_p, bool *error_p)
{
-/*---------------------------------------------------------------------------
- Process the non-comment record in the config file that is next on the file.
- See if it applies to a connection to a host with IP address "*raddr"
- to a database named "*database". If so, return *matches_p true
- and *userauth_p and *auth_arg as the values from the entry.
- If not, leave *matches_p as it was. If the record has a syntax error,
- return *error_p true, after issuing a message to stderr. If no error,
- leave *error_p as it was.
----------------------------------------------------------------------------*/
- char db[MAX_TOKEN],
- buf[MAX_TOKEN];
-
- /* Read the record type field. */
-
- next_token(file, buf, sizeof(buf));
-
- if (buf[0] == '\0')
- return;
+ char *db;
+ char *token;
+ Assert(line != NIL);
+ token = lfirst(line);
/* Check the record type. */
-
- if (strcmp(buf, "local") == 0)
+ if (strcmp(token, "local") == 0)
{
/* Get the database. */
-
- next_token(file, db, sizeof(db));
-
- if (db[0] == '\0')
- goto syntax;
-
+ line = lnext(line);
+ if (!line)
+ goto hba_syntax;
+ db = lfirst(line);
+
+ line = lnext(line);
+ if (!line)
+ goto hba_syntax;
/* Read the rest of the line. */
-
- read_hba_entry2(file, &port->auth_method, port->auth_arg, error_p);
+ parse_hba_auth(line, &port->auth_method, port->auth_arg, error_p);
+ if (*error_p)
+ goto hba_syntax;
/*
* For now, disallow methods that need AF_INET sockets to work.
*/
-
if (!*error_p &&
(port->auth_method == uaIdent ||
port->auth_method == uaKrb4 ||
port->auth_method == uaKrb5))
- *error_p = true;
-
- if (*error_p)
- goto syntax;
+ goto hba_syntax;
/*
* If this record isn't for our database, or this is the wrong
* sort of connection, ignore it.
*/
-
if ((strcmp(db, port->database) != 0 && strcmp(db, "all") != 0 &&
(strcmp(db, "sameuser") != 0 || strcmp(port->database, port->user) != 0)) ||
port->raddr.sa.sa_family != AF_UNIX)
return;
}
- else if (strcmp(buf, "host") == 0 || strcmp(buf, "hostssl") == 0)
+ else if (strcmp(token, "host") == 0 || strcmp(token, "hostssl") == 0)
{
- struct in_addr file_ip_addr,
- mask;
- bool discard = 0;/* Discard this entry */
+ struct in_addr file_ip_addr, mask;
#ifdef USE_SSL
/* If SSL, then check that we are on SSL */
- if (strcmp(buf, "hostssl") == 0)
+ if (strcmp(token, "hostssl") == 0)
{
if (!port->ssl)
- discard = 1;
+ return;
/* Placeholder to require specific SSL level, perhaps? */
/* Or a client certificate */
}
#else
/* If not SSL, we don't support this */
- if (strcmp(buf, "hostssl") == 0)
- goto syntax;
+ if (strcmp(token, "hostssl") == 0)
+ goto hba_syntax;
#endif
/* Get the database. */
-
- next_token(file, db, sizeof(db));
-
- if (db[0] == '\0')
- goto syntax;
+ line = lnext(line);
+ if (!line)
+ goto hba_syntax;
+ db = lfirst(line);
/* Read the IP address field. */
-
- next_token(file, buf, sizeof(buf));
-
- if (buf[0] == '\0')
- goto syntax;
+ line = lnext(line);
+ if (!line)
+ goto hba_syntax;
+ token = lfirst(line);
/* Remember the IP address field and go get mask field. */
-
- if (!inet_aton(buf, &file_ip_addr))
- {
- read_through_eol(file);
- goto syntax;
- }
+ if (!inet_aton(token, &file_ip_addr))
+ goto hba_syntax;
/* Read the mask field. */
+ line = lnext(line);
+ if (!line)
+ goto hba_syntax;
+ token = lfirst(line);
- next_token(file, buf, sizeof(buf));
-
- if (buf[0] == '\0')
- goto syntax;
-
- if (!inet_aton(buf, &mask))
- {
- read_through_eol(file);
- goto syntax;
- }
+ if (!inet_aton(token, &mask))
+ goto hba_syntax;
/*
* This is the record we're looking for. Read the rest of the
* info from it.
*/
-
- read_hba_entry2(file, &port->auth_method, port->auth_arg, error_p);
-
+ line = lnext(line);
+ if (!line)
+ goto hba_syntax;
+ parse_hba_auth(line, &port->auth_method, port->auth_arg, error_p);
if (*error_p)
- goto syntax;
-
- /*
- * If told to discard earlier. Moved down here so we don't get
- * "out of sync" with the file.
- */
- if (discard)
- return;
+ goto hba_syntax;
/*
* If this record isn't for our database, or this is the wrong
* sort of connection, ignore it.
*/
-
if ((strcmp(db, port->database) != 0 && strcmp(db, "all") != 0 &&
(strcmp(db, "sameuser") != 0 || strcmp(port->database, port->user) != 0)) ||
port->raddr.sa.sa_family != AF_INET ||
return;
}
else
- {
- read_through_eol(file);
- goto syntax;
- }
-
- *matches_p = true;
+ goto hba_syntax;
+ /* Success */
+ *found_p = true;
return;
-syntax:
+hba_syntax:
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "process_hba_record: invalid syntax in pg_hba.conf file\n");
+ "parse_hba: invalid syntax in pg_hba.conf file\n");
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
*error_p = true;
+ return;
}
-
-static void
-process_open_config_file(FILE *file, hbaPort *port, bool *hba_ok_p)
+/*
+ * Process the hba file line by line.
+ */
+static bool
+check_hba(hbaPort *port)
{
-/*---------------------------------------------------------------------------
- This function does the same thing as find_hba_entry, only with
- the config file already open on stream descriptor "file".
-----------------------------------------------------------------------------*/
- bool found_entry = false; /* found an applicable entry? */
- bool error = false; /* found an erroneous entry? */
- bool eof = false; /* end of hba file */
-
- while (!eof && !found_entry && !error)
- {
- /* Process a line from the config file */
- int c = getc(file);
+ List *line;
+ bool found_entry = false;
+ bool error = false;
- if (c == EOF)
- eof = true;
- else
- {
- ungetc(c, file);
- if (c == '#')
- read_through_eol(file);
- else
- process_hba_record(file, port, &found_entry, &error);
- }
+ foreach (line, hba_lines)
+ {
+ parse_hba(lfirst(line), port, &found_entry, &error);
+ if (found_entry || error)
+ break;
}
if (!error)
{
/* If no matching entry was found, synthesize 'reject' entry. */
-
if (!found_entry)
port->auth_method = uaReject;
-
- *hba_ok_p = true;
+ return true;
}
+ else
+ return false;
}
-
-static void
-find_hba_entry(hbaPort *port, bool *hba_ok_p)
-{
/*
- * Read the config file and find an entry that allows connection from
- * host "raddr", user "user", to database "database". If found,
- * return *hba_ok_p = true and *userauth_p and *auth_arg representing
- * the contents of that entry. If there is no matching entry, we
- * set *hba_ok_p = true, *userauth_p = uaReject.
- *
- * If the config file is unreadable or contains invalid syntax, we
- * issue a diagnostic message to stderr (ie, the postmaster log file)
- * and return without changing *hba_ok_p.
- *
+ * Read the config file and create a List of Lists of tokens in the file.
* If we find a file by the old name of the config file (pg_hba), we issue
* an error message because it probably needs to be converted. He didn't
* follow directions and just installed his old hba file in the new database
* system.
*/
+static void
+load_hba()
+{
int fd,
bufsize;
FILE *file; /* The config file we have to read */
char *old_conf_file;
- /* The name of old config file that better not exist. */
-
- /* Fail if config file by old name exists. */
-
-
- /* put together the full pathname to the old config file */
+ if (hba_lines)
+ free_lines(&hba_lines);
+ /*
+ * The name of old config file that better not exist.
+ * Fail if config file by old name exists.
+ * Put together the full pathname to the old config file.
+ */
bufsize = (strlen(DataDir) + strlen(OLD_CONF_FILE) + 2) * sizeof(char);
old_conf_file = (char *) palloc(bufsize);
snprintf(old_conf_file, bufsize, "%s/%s", DataDir, OLD_CONF_FILE);
/* Old config file exists. Tell this guy he needs to upgrade. */
close(fd);
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "A file exists by the name used for host-based authentication "
- "in prior releases of Postgres (%s). The name and format of "
- "the configuration file have changed, so this file should be "
- "converted.\n",
- old_conf_file);
+ "A file exists by the name used for host-based authentication "
+ "in prior releases of Postgres (%s). The name and format of "
+ "the configuration file have changed, so this file should be "
+ "converted.\n", old_conf_file);
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
}
if (file == NULL)
{
/* The open of the config file failed. */
-
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "find_hba_entry: Unable to open authentication config file \"%s\": %s\n",
+ "load_hba: Unable to open authentication config file \"%s\": %s\n",
conf_file, strerror(errno));
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
}
else
{
- process_open_config_file(file, port, hba_ok_p);
+ tokenize_file(file, &hba_lines);
FreeFile(file);
}
pfree(conf_file);
}
+/*
+ * Take the line and compare it to the needed map, pg_user and ident_user.
+ */
static void
-interpret_ident_response(char *ident_response,
- bool *error_p, char *ident_username)
+parse_ident_usermap(List *line, const char *usermap_name, const char *pg_user,
+ const char *ident_user, bool *found_p, bool *error_p)
+{
+ char *token;
+ char *file_map;
+ char *file_pguser;
+ char *file_ident_user;
+
+ *error_p = false;
+ *found_p = false;
+
+ /* A token read from the file */
+ Assert(line != NIL);
+ token = lfirst(line);
+ file_map = token;
+
+ line = lnext(line);
+ if (!line)
+ goto ident_syntax;
+ token = lfirst(line);
+ if (token[0] != '\0')
+ {
+ file_ident_user = token;
+ line = lnext(line);
+ if (!line)
+ goto ident_syntax;
+ token = lfirst(line);
+ if (token[0] != '\0')
+ {
+ file_pguser = token;
+ if (strcmp(file_map, usermap_name) == 0 &&
+ strcmp(file_pguser, pg_user) == 0 &&
+ strcmp(file_ident_user, ident_user) == 0)
+ *found_p = true;
+ }
+ }
+
+ return;
+
+ident_syntax:
+ snprintf(PQerrormsg, PQERRORMSG_LENGTH,
+ "parse_ident_usermap: invalid syntax in pg_ident.conf file\n");
+ fputs(PQerrormsg, stderr);
+ pqdebug("%s", PQerrormsg);
+ *error_p = true;
+ return;
+}
+
+
+/*
+ * Process the ident usermap file line by line.
+ */
+static bool
+check_ident_usermap(const char *usermap_name,
+ const char *pg_user,
+ const char *ident_user)
+{
+ List *line;
+ bool found_entry = false, error = false;
+
+ if (usermap_name[0] == '\0')
+ {
+ snprintf(PQerrormsg, PQERRORMSG_LENGTH,
+ "load_ident_usermap: hba configuration file does not "
+ "have the usermap field filled in in the entry that pertains "
+ "to this connection. That field is essential for Ident-based "
+ "authentication.\n");
+ fputs(PQerrormsg, stderr);
+ pqdebug("%s", PQerrormsg);
+ found_entry = false;
+ }
+ else if (strcmp(usermap_name, "sameuser") == 0)
+ {
+ if (strcmp(pg_user, ident_user) == 0)
+ found_entry = true;
+ else
+ found_entry = false;
+ }
+ else
+ {
+ foreach(line, ident_lines)
+ {
+ parse_ident_usermap(lfirst(line), usermap_name, pg_user,
+ ident_user, &found_entry, &error);
+ if (found_entry || error)
+ break;
+ }
+ }
+ return found_entry;
+}
+
+
+/*
+ * See if the user with ident username "ident_user" is allowed to act
+ * as Postgres user "pguser" according to usermap "usermap_name". Look
+ * it up in the usermap file.
+ *
+ * Special case: For usermap "sameuser", don't look in the usermap
+ * file. That's an implied map where "pguser" must be identical to
+ * "ident_user" in order to be authorized.
+ *
+ * Iff authorized, return *checks_out_p == true.
+ */
+static void
+load_ident()
{
-/*----------------------------------------------------------------------------
- Parse the string "*ident_response" as a response from a query to an Ident
- server. If it's a normal response indicating a username, return
- *error_p == false and the username as *ident_username. If it's anything
- else, return *error_p == true and *ident_username undefined.
-----------------------------------------------------------------------------*/
- char *cursor; /* Cursor into *ident_response */
+ FILE *file; /* The map file we have to read */
+ char *map_file; /* The name of the map file we have to
+ * read */
+ int bufsize;
- cursor = &ident_response[0];
+ if (ident_lines)
+ free_lines(&ident_lines);
+
+ /* put together the full pathname to the map file */
+ bufsize = (strlen(DataDir) + strlen(USERMAP_FILE) + 2) * sizeof(char);
+ map_file = (char *) palloc(bufsize);
+ snprintf(map_file, bufsize, "%s/%s", DataDir, USERMAP_FILE);
+
+ file = AllocateFile(map_file, PG_BINARY_R);
+ if (file == NULL)
+ {
+ /* The open of the map file failed. */
+ snprintf(PQerrormsg, PQERRORMSG_LENGTH,
+ "load_ident_usermap: Unable to open usermap file \"%s\": %s\n",
+ map_file, strerror(errno));
+ fputs(PQerrormsg, stderr);
+ pqdebug("%s", PQerrormsg);
+ }
+ else
+ {
+ tokenize_file(file, &ident_lines);
+ FreeFile(file);
+ }
+ pfree(map_file);
+}
+
+
+/*
+ * Parse the string "*ident_response" as a response from a query to an Ident
+ * server. If it's a normal response indicating a username, return
+ * *error_p == false and the username as *ident_user. If it's anything
+ * else, return *error_p == true and *ident_user undefined.
+ */
+static bool
+interpret_ident_response(char *ident_response,
+ char *ident_user)
+{
+ char *cursor = ident_response;/* Cursor into *ident_response */
/*
* Ident's response, in the telnet tradition, should end in crlf
* (\r\n).
*/
if (strlen(ident_response) < 2)
- *error_p = true;
+ return false;
else if (ident_response[strlen(ident_response) - 2] != '\r')
- *error_p = true;
+ return false;
else
{
while (*cursor != ':' && *cursor != '\r')
cursor++; /* skip port field */
if (*cursor != ':')
- *error_p = true;
+ return false;
else
{
/* We're positioned to colon before response type field */
while (isblank(*cursor))
cursor++; /* skip blanks */
i = 0;
- while (*cursor != ':' && *cursor != '\r' && !isblank(*cursor)
- && i < (int) (sizeof(response_type) - 1))
+ while (*cursor != ':' && *cursor != '\r' && !isblank(*cursor) &&
+ i < (int) (sizeof(response_type) - 1))
response_type[i++] = *cursor++;
response_type[i] = '\0';
while (isblank(*cursor))
cursor++; /* skip blanks */
if (strcmp(response_type, "USERID") != 0)
- *error_p = true;
+ return false;
else
{
-
/*
* It's a USERID response. Good. "cursor" should be
* pointing to the colon that precedes the operating
* system type.
*/
if (*cursor != ':')
- *error_p = true;
+ return false;
else
{
cursor++; /* Go over colon */
while (*cursor != ':' && *cursor != '\r')
cursor++;
if (*cursor != ':')
- *error_p = true;
+ return false;
else
{
- int i; /* Index into *ident_username */
+ int i; /* Index into *ident_user */
cursor++; /* Go over colon */
while (isblank(*cursor))
/* Rest of line is username. Copy it over. */
i = 0;
while (*cursor != '\r' && i < IDENT_USERNAME_MAX)
- ident_username[i++] = *cursor++;
- ident_username[i] = '\0';
- *error_p = false;
+ ident_user[i++] = *cursor++;
+ ident_user[i] = '\0';
+ return true;
}
}
}
}
+/*
+ * Talk to the ident server on host "remote_ip_addr" and find out who
+ * owns the tcp connection from his port "remote_port" to port
+ * "local_port_addr" on host "local_ip_addr". Return the username the
+ * ident server gives as "*ident_user".
-static void
-ident(const struct in_addr remote_ip_addr, const struct in_addr local_ip_addr,
- const ushort remote_port, const ushort local_port,
- bool *ident_failed, char *ident_username)
-{
-/*--------------------------------------------------------------------------
- Talk to the ident server on host "remote_ip_addr" and find out who
- owns the tcp connection from his port "remote_port" to port
- "local_port_addr" on host "local_ip_addr". Return the username the
- ident server gives as "*ident_username".
-
- IP addresses and port numbers are in network byte order.
-
- But iff we're unable to get the information from ident, return
- *ident_failed == true (and *ident_username undefined).
-----------------------------------------------------------------------------*/
-
+ * IP addresses and port numbers are in network byte order.
+ * But iff we're unable to get the information from ident, return
+ * false.
+ */
+static int
+ident(const struct in_addr remote_ip_addr,
+ const struct in_addr local_ip_addr,
+ const ushort remote_port,
+ const ushort local_port,
+ char *ident_user)
+{
int sock_fd, /* File descriptor for socket on which we
* talk to Ident */
rc; /* Return code from a locally called
* function */
+ bool ident_return;
sock_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sock_fd == -1)
{
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "Failed to create socket on which to talk to Ident server. "
- "socket() returned errno = %s (%d)\n",
- strerror(errno), errno);
+ "Failed to create socket on which to talk to Ident server. "
+ "socket() returned errno = %s (%d)\n", strerror(errno), errno);
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
+ ident_return = false;
}
else
{
{
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
"Unable to connect to Ident server on the host which is "
- "trying to connect to Postgres "
- "(IP address %s, Port %d). "
- "errno = %s (%d)\n",
- inet_ntoa(remote_ip_addr), IDENT_PORT, strerror(errno), errno);
+ "trying to connect to Postgres "
+ "(IP address %s, Port %d). "
+ "errno = %s (%d)\n",
+ inet_ntoa(remote_ip_addr), IDENT_PORT, strerror(errno), errno);
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
- *ident_failed = true;
+ ident_return = false;
}
else
{
if (rc < 0)
{
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "Unable to send query to Ident server on the host which is "
- "trying to connect to Postgres (Host %s, Port %d),"
- "even though we successfully connected to it. "
- "errno = %s (%d)\n",
- inet_ntoa(remote_ip_addr), IDENT_PORT, strerror(errno), errno);
+ "Unable to send query to Ident server on the host which is "
+ "trying to connect to Postgres (Host %s, Port %d),"
+ "even though we successfully connected to it. "
+ "errno = %s (%d)\n",
+ inet_ntoa(remote_ip_addr), IDENT_PORT, strerror(errno), errno);
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
- *ident_failed = true;
+ ident_return = false;
}
else
{
char ident_response[80 + IDENT_USERNAME_MAX];
- rc = recv(sock_fd, ident_response, sizeof(ident_response) - 1, 0);
+ rc = recv(sock_fd, ident_response,
+ sizeof(ident_response) - 1, 0);
if (rc < 0)
{
snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "Unable to receive response from Ident server "
- "on the host which is "
- "trying to connect to Postgres (Host %s, Port %d),"
- "even though we successfully sent our query to it. "
- "errno = %s (%d)\n",
- inet_ntoa(remote_ip_addr), IDENT_PORT,
- strerror(errno), errno);
+ "Unable to receive response from Ident server "
+ "on the host which is "
+ "trying to connect to Postgres (Host %s, Port %d),"
+ "even though we successfully sent our query to it. "
+ "errno = %s (%d)\n",
+ inet_ntoa(remote_ip_addr), IDENT_PORT,
+ strerror(errno), errno);
fputs(PQerrormsg, stderr);
pqdebug("%s", PQerrormsg);
- *ident_failed = true;
+ ident_return = false;
}
else
{
- bool error; /* response from Ident is garbage. */
-
ident_response[rc] = '\0';
- interpret_ident_response(ident_response, &error, ident_username);
- *ident_failed = error;
+ ident_return = interpret_ident_response(ident_response,
+ ident_user);
}
}
close(sock_fd);
}
}
+ return ident_return;
}
-
-static void
-parse_map_record(FILE *file,
- char *file_map, char *file_pguser, char *file_iuser)
-{
-/*---------------------------------------------------------------------------
- Take the noncomment line which is next on file "file" and interpret
- it as a line in a usermap file. Specifically, return the first
- 3 tokens as file_map, file_iuser, and file_pguser, respectively. If
- there are fewer than 3 tokens, return null strings for the missing
- ones.
-
----------------------------------------------------------------------------*/
- char buf[MAX_TOKEN];
-
- /* A token read from the file */
-
- /* Set defaults in case fields not in file */
- file_map[0] = '\0';
- file_pguser[0] = '\0';
- file_iuser[0] = '\0';
-
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- strcpy(file_map, buf);
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- strcpy(file_iuser, buf);
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- strcpy(file_pguser, buf);
- read_through_eol(file);
- return;
- }
- }
- snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "Incomplete line in pg_ident: %s", file_map);
- fputs(PQerrormsg, stderr);
- pqdebug("%s", PQerrormsg);
- }
-}
-
-
-
-static void
-verify_against_open_usermap(FILE *file,
- const char *pguser,
- const char *ident_username,
- const char *usermap_name,
- bool *checks_out_p)
-{
-/*--------------------------------------------------------------------------
- This function does the same thing as verify_against_usermap,
- only with the config file already open on stream descriptor "file".
----------------------------------------------------------------------------*/
- bool match; /* We found a matching entry in the map
- * file */
- bool eof; /* We've reached the end of the file we're
- * reading */
-
- match = false; /* initial value */
- eof = false; /* initial value */
- while (!eof && !match)
- {
- /* Process a line from the map file */
-
- int c; /* a character read from the file */
-
- c = getc(file);
- ungetc(c, file);
- if (c == EOF)
- eof = true;
- else
- {
- if (c == '#')
- read_through_eol(file);
- else
- {
- /* The following are fields read from a record of the file */
- char file_map[MAX_TOKEN + 1];
- char file_pguser[MAX_TOKEN + 1];
- char file_iuser[MAX_TOKEN + 1];
-
- parse_map_record(file, file_map, file_pguser, file_iuser);
- if (strcmp(file_map, usermap_name) == 0 &&
- strcmp(file_pguser, pguser) == 0 &&
- strcmp(file_iuser, ident_username) == 0)
- match = true;
- }
- }
- }
- *checks_out_p = match;
-}
-
-
-
-static void
-verify_against_usermap(const char *pguser,
- const char *ident_username,
- const char *usermap_name,
- bool *checks_out_p)
+/*
+ * Talk to the ident server on the remote host and find out who owns the
+ * connection described by "port". Then look in the usermap file under
+ * the usermap *auth_arg and see if that user is equivalent to
+ * Postgres user *user.
+ *
+ * Return STATUS_OK if yes.
+ */
+int
+authident(struct sockaddr_in *raddr, struct sockaddr_in *laddr,
+ const char *pg_user, const char *auth_arg)
{
-/*--------------------------------------------------------------------------
- See if the user with ident username "ident_username" is allowed to act
- as Postgres user "pguser" according to usermap "usermap_name". Look
- it up in the usermap file.
-
- Special case: For usermap "sameuser", don't look in the usermap
- file. That's an implied map where "pguser" must be identical to
- "ident_username" in order to be authorized.
-
- Iff authorized, return *checks_out_p == true.
+ /* We were unable to get ident to give us a username */
+ char ident_user[IDENT_USERNAME_MAX + 1];
---------------------------------------------------------------------------*/
+ /* The username returned by ident */
+ if (!ident(raddr->sin_addr, laddr->sin_addr,
+ raddr->sin_port, laddr->sin_port, ident_user))
+ return STATUS_ERROR;
- if (usermap_name[0] == '\0')
- {
- *checks_out_p = false;
- snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "verify_against_usermap: hba configuration file does not "
- "have the usermap field filled in in the entry that pertains "
- "to this connection. That field is essential for Ident-based "
- "authentication.\n");
- fputs(PQerrormsg, stderr);
- pqdebug("%s", PQerrormsg);
- }
- else if (strcmp(usermap_name, "sameuser") == 0)
- {
- if (strcmp(ident_username, pguser) == 0)
- *checks_out_p = true;
- else
- *checks_out_p = false;
- }
+ if (check_ident_usermap(auth_arg, pg_user, ident_user))
+ return STATUS_OK;
else
- {
- FILE *file; /* The map file we have to read */
- char *map_file; /* The name of the map file we have to
- * read */
- int bufsize;
-
- /* put together the full pathname to the map file */
- bufsize = (strlen(DataDir) + strlen(USERMAP_FILE) + 2) * sizeof(char);
- map_file = (char *) palloc(bufsize);
- snprintf(map_file, bufsize, "%s/%s", DataDir, USERMAP_FILE);
-
- file = AllocateFile(map_file, PG_BINARY_R);
- if (file == NULL)
- {
- /* The open of the map file failed. */
-
- snprintf(PQerrormsg, PQERRORMSG_LENGTH,
- "verify_against_usermap: Unable to open usermap file \"%s\": %s\n",
- map_file, strerror(errno));
- fputs(PQerrormsg, stderr);
- pqdebug("%s", PQerrormsg);
-
- *checks_out_p = false;
- }
- else
- {
- verify_against_open_usermap(file,
- pguser, ident_username, usermap_name,
- checks_out_p);
- FreeFile(file);
- }
- pfree(map_file);
-
-
- }
+ return STATUS_ERROR;
}
-
+/*
+ * Determine what authentication method should be used when accessing database
+ * "database" from frontend "raddr", user "user". Return the method,
+ * an optional argument, and STATUS_OK.
+ * Note that STATUS_ERROR indicates a problem with the hba config file.
+ * If the file is OK but does not contain any entry matching the request,
+ * we return STATUS_OK and method = uaReject.
+ */
int
-authident(struct sockaddr_in * raddr, struct sockaddr_in * laddr,
- const char *postgres_username,
- const char *auth_arg)
+hba_getauthmethod(hbaPort *port)
{
-/*---------------------------------------------------------------------------
- Talk to the ident server on the remote host and find out who owns the
- connection described by "port". Then look in the usermap file under
- the usermap *auth_arg and see if that user is equivalent to
- Postgres user *user.
-
- Return STATUS_OK if yes.
----------------------------------------------------------------------------*/
- bool checks_out;
- bool ident_failed;
- /* We were unable to get ident to give us a username */
- char ident_username[IDENT_USERNAME_MAX + 1];
-
- /* The username returned by ident */
-
- ident(raddr->sin_addr, laddr->sin_addr,
- raddr->sin_port, laddr->sin_port,
- &ident_failed, ident_username);
-
- if (ident_failed)
+ if (check_hba(port))
+ return STATUS_OK;
+ else
return STATUS_ERROR;
+}
- verify_against_usermap(postgres_username, ident_username, auth_arg,
- &checks_out);
-
- return checks_out ? STATUS_OK : STATUS_ERROR;
+/*
+ * Clear tokenized file contents and force reload on next use.
+ */
+void load_hba_and_ident(void)
+{
+ load_hba();
+ load_ident();
}
+/* Character set stuff. Not sure it really belongs in this file. */
+
#ifdef CYR_RECODE
#define CHARSET_FILE "charset.conf"
#define MAX_CHARSETS 10
char Table[MAX_TOKEN];
};
+
static bool
-InRange(char *buf, int host)
+CharSetInRange(char *buf, int host)
{
int valid,
i,
else
{
if (c == '#')
- read_through_eol(file);
+ read_to_eol(file);
else
{
/* Read the key */
next_token(file, buf, sizeof(buf));
if (buf[0] != '\0')
{
- if (InRange(buf, host))
+ if (CharSetInRange(buf, host))
{
/* Read the charset */
next_token(file, buf, sizeof(buf));
}
break;
}
- read_through_eol(file);
+ read_to_eol(file);
}
}
}
pfree((struct CharsetItem *) ChArray[i]);
}
}
-
#endif
-int
-hba_getauthmethod(hbaPort *port)
-{
-/*---------------------------------------------------------------------------
- Determine what authentication method should be used when accessing database
- "database" from frontend "raddr", user "user". Return the method,
- an optional argument, and STATUS_OK.
- Note that STATUS_ERROR indicates a problem with the hba config file.
- If the file is OK but does not contain any entry matching the request,
- we return STATUS_OK and method = uaReject.
-----------------------------------------------------------------------------*/
- bool hba_ok = false;
-
- find_hba_entry(port, &hba_ok);
-
- return hba_ok ? STATUS_OK : STATUS_ERROR;
-}
+
+
projects / postgresql / commitdiff