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-rw-r--r--crypto/kerberosIV/appl/bsd/login_access.c264
1 files changed, 0 insertions, 264 deletions
diff --git a/crypto/kerberosIV/appl/bsd/login_access.c b/crypto/kerberosIV/appl/bsd/login_access.c
deleted file mode 100644
index 7b79dc8..0000000
--- a/crypto/kerberosIV/appl/bsd/login_access.c
+++ /dev/null
@@ -1,264 +0,0 @@
- /*
- * This module implements a simple but effective form of login access
- * control based on login names and on host (or domain) names, internet
- * addresses (or network numbers), or on terminal line names in case of
- * non-networked logins. Diagnostics are reported through syslog(3).
- *
- * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
- */
-
-#include "bsd_locl.h"
-
-RCSID("$Id: login_access.c,v 1.19 1999/05/14 22:02:14 assar Exp $");
-
-#ifdef LOGIN_ACCESS
-
- /* Delimiters for fields and for lists of users, ttys or hosts. */
-
-static char fs[] = ":"; /* field separator */
-static char sep[] = ", \t"; /* list-element separator */
-
- /* Constants to be used in assignments only, not in comparisons... */
-
-#define YES 1
-#define NO 0
-
- /*
- * A structure to bundle up all login-related information to keep the
- * functional interfaces as generic as possible.
- */
-struct login_info {
- struct passwd *user;
- char *from;
-};
-
-static int list_match(char *list, struct login_info *item,
- int (*match_fn)(char *, struct login_info *));
-static int user_match(char *tok, struct login_info *item);
-static int from_match(char *tok, struct login_info *item);
-static int string_match(char *tok, char *string);
-
-/* login_access - match username/group and host/tty with access control file */
-
-int login_access(struct passwd *user, char *from)
-{
- struct login_info item;
- FILE *fp;
- char line[BUFSIZ];
- char *perm; /* becomes permission field */
- char *users; /* becomes list of login names */
- char *froms; /* becomes list of terminals or hosts */
- int match = NO;
- int end;
- int lineno = 0; /* for diagnostics */
- char *foo;
-
- /*
- * Bundle up the arguments to avoid unnecessary clumsiness lateron.
- */
- item.user = user;
- item.from = from;
-
- /*
- * Process the table one line at a time and stop at the first match.
- * Blank lines and lines that begin with a '#' character are ignored.
- * Non-comment lines are broken at the ':' character. All fields are
- * mandatory. The first field should be a "+" or "-" character. A
- * non-existing table means no access control.
- */
-
- if ((fp = fopen(_PATH_LOGACCESS, "r")) != 0) {
- while (!match && fgets(line, sizeof(line), fp)) {
- lineno++;
- if (line[end = strlen(line) - 1] != '\n') {
- syslog(LOG_ERR, "%s: line %d: missing newline or line too long",
- _PATH_LOGACCESS, lineno);
- continue;
- }
- if (line[0] == '#')
- continue; /* comment line */
- while (end > 0 && isspace((unsigned char)line[end - 1]))
- end--;
- line[end] = 0; /* strip trailing whitespace */
- if (line[0] == 0) /* skip blank lines */
- continue;
- foo = NULL;
- if (!(perm = strtok_r(line, fs, &foo))
- || !(users = strtok_r(NULL, fs, &foo))
- || !(froms = strtok_r(NULL, fs, &foo))
- || strtok_r(NULL, fs, &foo)) {
- syslog(LOG_ERR, "%s: line %d: bad field count",
- _PATH_LOGACCESS,
- lineno);
- continue;
- }
- if (perm[0] != '+' && perm[0] != '-') {
- syslog(LOG_ERR, "%s: line %d: bad first field",
- _PATH_LOGACCESS,
- lineno);
- continue;
- }
- match = (list_match(froms, &item, from_match)
- && list_match(users, &item, user_match));
- }
- fclose(fp);
- } else if (errno != ENOENT) {
- syslog(LOG_ERR, "cannot open %s: %m", _PATH_LOGACCESS);
- }
- return (match == 0 || (line[0] == '+'));
-}
-
-/* list_match - match an item against a list of tokens with exceptions */
-
-static int
-list_match(char *list,
- struct login_info *item,
- int (*match_fn)(char *, struct login_info *))
-{
- char *tok;
- int match = NO;
- char *foo = NULL;
-
- /*
- * Process tokens one at a time. We have exhausted all possible matches
- * when we reach an "EXCEPT" token or the end of the list. If we do find
- * a match, look for an "EXCEPT" list and recurse to determine whether
- * the match is affected by any exceptions.
- */
-
- for (tok = strtok_r(list, sep, &foo);
- tok != NULL;
- tok = strtok_r(NULL, sep, &foo)) {
- if (strcasecmp(tok, "EXCEPT") == 0) /* EXCEPT: give up */
- break;
- if ((match = (*match_fn) (tok, item)) != 0) /* YES */
- break;
- }
- /* Process exceptions to matches. */
-
- if (match != NO) {
- while ((tok = strtok_r(NULL, sep, &foo)) && strcasecmp(tok, "EXCEPT"))
- /* VOID */ ;
- if (tok == 0 || list_match(NULL, item, match_fn) == NO)
- return (match);
- }
- return (NO);
-}
-
-/* myhostname - figure out local machine name */
-
-static char *myhostname(void)
-{
- static char name[MAXHOSTNAMELEN + 1] = "";
-
- if (name[0] == 0) {
- gethostname(name, sizeof(name));
- name[MAXHOSTNAMELEN] = 0;
- }
- return (name);
-}
-
-/* netgroup_match - match group against machine or user */
-
-static int netgroup_match(char *group, char *machine, char *user)
-{
-#ifdef HAVE_YP_GET_DEFAULT_DOMAIN
- static char *mydomain = 0;
-
- if (mydomain == 0)
- yp_get_default_domain(&mydomain);
- return (innetgr(group, machine, user, mydomain));
-#else
- syslog(LOG_ERR, "NIS netgroup support not configured");
- return 0;
-#endif
-}
-
-/* user_match - match a username against one token */
-
-static int user_match(char *tok, struct login_info *item)
-{
- char *string = item->user->pw_name;
- struct login_info fake_item;
- struct group *group;
- int i;
- char *at;
-
- /*
- * If a token has the magic value "ALL" the match always succeeds.
- * Otherwise, return YES if the token fully matches the username, if the
- * token is a group that contains the username, or if the token is the
- * name of the user's primary group.
- */
-
- if ((at = strchr(tok + 1, '@')) != 0) { /* split user@host pattern */
- *at = 0;
- fake_item.from = myhostname();
- return (user_match(tok, item) && from_match(at + 1, &fake_item));
- } else if (tok[0] == '@') { /* netgroup */
- return (netgroup_match(tok + 1, (char *) 0, string));
- } else if (string_match(tok, string)) { /* ALL or exact match */
- return (YES);
- } else if ((group = getgrnam(tok)) != 0) { /* try group membership */
- if (item->user->pw_gid == group->gr_gid)
- return (YES);
- for (i = 0; group->gr_mem[i]; i++)
- if (strcasecmp(string, group->gr_mem[i]) == 0)
- return (YES);
- }
- return (NO);
-}
-
-/* from_match - match a host or tty against a list of tokens */
-
-static int from_match(char *tok, struct login_info *item)
-{
- char *string = item->from;
- int tok_len;
- int str_len;
-
- /*
- * If a token has the magic value "ALL" the match always succeeds. Return
- * YES if the token fully matches the string. If the token is a domain
- * name, return YES if it matches the last fields of the string. If the
- * token has the magic value "LOCAL", return YES if the string does not
- * contain a "." character. If the token is a network number, return YES
- * if it matches the head of the string.
- */
-
- if (tok[0] == '@') { /* netgroup */
- return (netgroup_match(tok + 1, string, (char *) 0));
- } else if (string_match(tok, string)) { /* ALL or exact match */
- return (YES);
- } else if (tok[0] == '.') { /* domain: match last fields */
- if ((str_len = strlen(string)) > (tok_len = strlen(tok))
- && strcasecmp(tok, string + str_len - tok_len) == 0)
- return (YES);
- } else if (strcasecmp(tok, "LOCAL") == 0) { /* local: no dots */
- if (strchr(string, '.') == 0)
- return (YES);
- } else if (tok[(tok_len = strlen(tok)) - 1] == '.' /* network */
- && strncmp(tok, string, tok_len) == 0) {
- return (YES);
- }
- return (NO);
-}
-
-/* string_match - match a string against one token */
-
-static int string_match(char *tok, char *string)
-{
-
- /*
- * If the token has the magic value "ALL" the match always succeeds.
- * Otherwise, return YES if the token fully matches the string.
- */
-
- if (strcasecmp(tok, "ALL") == 0) { /* all: always matches */
- return (YES);
- } else if (strcasecmp(tok, string) == 0) { /* try exact match */
- return (YES);
- }
- return (NO);
-}
-#endif /* LOGIN_ACCES */
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