diff options
Diffstat (limited to 'nis/nss_compat/compat-spwd.c')
| -rw-r--r-- | nis/nss_compat/compat-spwd.c | 404 |
1 files changed, 323 insertions, 81 deletions
diff --git a/nis/nss_compat/compat-spwd.c b/nis/nss_compat/compat-spwd.c index 6fc71101fe..86aa347abe 100644 --- a/nis/nss_compat/compat-spwd.c +++ b/nis/nss_compat/compat-spwd.c @@ -19,14 +19,17 @@ #include <nss.h> #include <errno.h> -#include <fcntl.h> #include <ctype.h> +#include <fcntl.h> #include <netdb.h> #include <shadow.h> #include <string.h> #include <libc-lock.h> #include <rpcsvc/yp.h> #include <rpcsvc/ypclnt.h> +#include <nsswitch.h> + +#include "netgroup.h" /* Get the declaration of the parser function. */ #define ENTNAME spent @@ -54,10 +57,11 @@ struct ent_t FILE *stream; struct blacklist_t blacklist; struct spwd pwd; + struct __netgrent netgrdata; }; typedef struct ent_t ent_t; -static ent_t ext_ent = {0, 0, 0, NULL, 0, NULL, {NULL, 0, 0}, +static ent_t ext_ent = {0, 0, 0, NULL, 0, NULL, {NULL, 0, 0}, {NULL, NULL, 0, 0, 0, 0, 0, 0, 0}}; /* Protect global state against multiple changers. */ @@ -131,6 +135,10 @@ internal_setspent (ent_t *ent) ent->nis = ent->first = ent->netgroup = 0; + /* If something was left over free it. */ + if (ent->netgroup) + __internal_endnetgrent (&ent->netgrdata); + if (ent->oldkey != NULL) { free (ent->oldkey); @@ -202,6 +210,9 @@ internal_endspent (ent_t *ent) ent->stream = NULL; } + if (ent->netgroup) + __internal_endnetgrent (&ent->netgrdata); + ent->nis = ent->first = ent->netgroup = 0; if (ent->oldkey != NULL) @@ -236,8 +247,8 @@ _nss_compat_endspent (void) static enum nss_status -getspent_next_netgr (struct spwd *result, ent_t *ent, char *group, - char *buffer, size_t buflen) +getspent_next_nis_netgr (const char *name, struct spwd *result, ent_t *ent, + char *group, char *buffer, size_t buflen) { struct parser_data *data = (void *) buffer; char *ypdomain, *host, *user, *domain, *outval, *p, *p2; @@ -254,15 +265,22 @@ getspent_next_netgr (struct spwd *result, ent_t *ent, char *group, if (ent->first == TRUE) { - setnetgrent (group); + bzero (&ent->netgrdata, sizeof (struct __netgrent)); + __internal_setnetgrent (group, &ent->netgrdata); ent->first = FALSE; } while (1) { - if ((status = getnetgrent (&host, &user, &domain)) != 1) + char *saved_cursor; + int parse_res; + + saved_cursor = ent->netgrdata.cursor; + status = __internal_getnetgrent_r (&host, &user, &domain, + &ent->netgrdata, buffer, buflen); + if (status != 1) { - endnetgrent (); + __internal_endnetgrent (&ent->netgrdata); ent->netgroup = 0; give_spwd_free (&ent->pwd); return NSS_STATUS_RETURN; @@ -274,6 +292,11 @@ getspent_next_netgr (struct spwd *result, ent_t *ent, char *group, if (domain != NULL && strcmp (ypdomain, domain) != 0) continue; + /* If name != NULL, we are called from getpwnam */ + if (name != NULL) + if (strcmp (user, name) != 0) + continue; + if (yp_match (ypdomain, "shadow.byname", user, strlen (user), &outval, &outvallen) != YPERR_SUCCESS) @@ -291,8 +314,17 @@ getspent_next_netgr (struct spwd *result, ent_t *ent, char *group, while (isspace (*p)) p++; free (outval); - if (_nss_files_parse_spent (p, result, data, buflen)) + if ((parse_res = _nss_files_parse_spent (p, result, data, buflen)) == -1) + { + ent->netgrdata.cursor = saved_cursor; + return NSS_STATUS_TRYAGAIN; + } + + if (parse_res) { + /* Store the User in the blacklist for the "+" at the end of + /etc/passwd */ + blacklist_store_name (result->sp_namp, ent); copy_spwd_changes (result, &ent->pwd, p2, p2len); break; } @@ -307,7 +339,7 @@ getspent_next_nis (struct spwd *result, ent_t *ent, { struct parser_data *data = (void *) buffer; char *domain, *outkey, *outval, *p, *p2; - int outkeylen, outvallen; + int outkeylen, outvallen, parse_res; size_t p2len; if (yp_get_default_domain (&domain) != YPERR_SUCCESS) @@ -327,6 +359,10 @@ getspent_next_nis (struct spwd *result, ent_t *ent, buflen -= p2len; do { + bool_t saved_first; + char *saved_oldkey; + int saved_oldlen; + if (ent->first) { if (yp_first (domain, "shadow.byname", &outkey, &outkeylen, @@ -336,7 +372,9 @@ getspent_next_nis (struct spwd *result, ent_t *ent, give_spwd_free (&ent->pwd); return NSS_STATUS_UNAVAIL; } - + saved_first = TRUE; + saved_oldkey = ent->oldkey; + saved_oldlen = ent->oldkeylen; ent->oldkey = outkey; ent->oldkeylen = outkeylen; ent->first = FALSE; @@ -352,7 +390,9 @@ getspent_next_nis (struct spwd *result, ent_t *ent, return NSS_STATUS_NOTFOUND; } - free (ent->oldkey); + saved_first = FALSE; + saved_oldkey = ent->oldkey; + saved_oldlen = ent->oldkeylen; ent->oldkey = outkey; ent->oldkeylen = outkeylen; } @@ -365,17 +405,92 @@ getspent_next_nis (struct spwd *result, ent_t *ent, while (isspace (*p)) ++p; + if ((parse_res = _nss_files_parse_spent (p, result, data, buflen)) == -1) + { + free (ent->oldkey); + ent->oldkey = saved_oldkey; + ent->oldkeylen = saved_oldlen; + ent->first = saved_first; + __set_errno (ERANGE); + return NSS_STATUS_TRYAGAIN; + } + else + { + if (!saved_first) + free (saved_oldkey); + } + if (parse_res && + in_blacklist (result->sp_namp, strlen (result->sp_namp), ent)) + parse_res = 0; } - while (!_nss_files_parse_spent (p, result, data, buflen)); + while (!parse_res); copy_spwd_changes (result, &ent->pwd, p2, p2len); - if (!in_blacklist (result->sp_namp, strlen (result->sp_namp), ent)) - return NSS_STATUS_SUCCESS; - else - return NSS_STATUS_NOTFOUND; + return NSS_STATUS_SUCCESS; } +/* This function handle the +user entrys in /etc/shadow */ +static enum nss_status +getspnam_plususer (const char *name, struct spwd *result, char *buffer, + size_t buflen) +{ + struct parser_data *data = (void *) buffer; + struct spwd pwd; + int parse_res; + char *p; + size_t plen; + char *domain, *outval, *ptr; + int outvallen; + + + memset (&pwd, '\0', sizeof (struct spwd)); + + copy_spwd_changes (&pwd, result, NULL, 0); + + plen = spwd_need_buflen (&pwd); + if (plen > buflen) + { + __set_errno (ERANGE); + return NSS_STATUS_TRYAGAIN; + } + p = buffer + (buflen - plen); + buflen -= plen; + + if (yp_get_default_domain (&domain) != YPERR_SUCCESS) + return NSS_STATUS_TRYAGAIN; + + if (yp_match (domain, "shadow.byname", name, strlen (name), + &outval, &outvallen) + != YPERR_SUCCESS) + return NSS_STATUS_TRYAGAIN; + ptr = strncpy (buffer, outval, buflen < (size_t) outvallen ? + buflen : (size_t) outvallen); + buffer[buflen < (size_t) outvallen ? buflen : (size_t) outvallen] = '\0'; + free (outval); + while (isspace (*ptr)) + ptr++; + if ((parse_res = _nss_files_parse_spent (ptr, result, data, buflen)) == -1) + { + __set_errno (ERANGE); + return NSS_STATUS_TRYAGAIN; + } + + if (parse_res) + { + copy_spwd_changes (result, &pwd, p, plen); + give_spwd_free (&pwd); + /* We found the entry. */ + return NSS_STATUS_SUCCESS; + } + else + { + /* Give buffer the old len back */ + buflen += plen; + give_spwd_free (&pwd); + } + return NSS_STATUS_RETURN; +} static enum nss_status getspent_next_file (struct spwd *result, ent_t *ent, @@ -384,11 +499,13 @@ getspent_next_file (struct spwd *result, ent_t *ent, struct parser_data *data = (void *) buffer; while (1) { - char *p, *p2; - size_t p2len; + fpos_t pos; + int parse_res = 0; + char *p; do { + fgetpos (ent->stream, &pos); p = fgets (buffer, buflen, ent->stream); if (p == NULL) return NSS_STATUS_NOTFOUND; @@ -400,10 +517,19 @@ getspent_next_file (struct spwd *result, ent_t *ent, while (isspace (*p)) ++p; } - while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */ + while (*p == '\0' || *p == '#' /* Ignore empty and comment lines. */ /* Parse the line. If it is invalid, loop to get the next line of the file to parse. */ - !_nss_files_parse_spent (p, result, data, buflen)); + || !(parse_res = _nss_files_parse_spent (p, result, data, + buflen))); + + if (parse_res == -1) + { + /* The parser ran out of space. */ + fsetpos (ent->stream, &pos); + __set_errno (ERANGE); + return NSS_STATUS_TRYAGAIN; + } if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-') /* This is a real entry. */ @@ -413,15 +539,19 @@ getspent_next_file (struct spwd *result, ent_t *ent, if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@' && result->sp_namp[2] != '\0') { - char *user, *host, *domain; - - setnetgrent (&result->sp_namp[2]); - while (getnetgrent (&host, &user, &domain)) + char buf2[1024]; + char *user, *host, *domain; + struct __netgrent netgrdata; + + bzero (&netgrdata, sizeof (struct __netgrent)); + __internal_setnetgrent (&result->sp_namp[2], &netgrdata); + while (__internal_getnetgrent_r (&host, &user, &domain, + &netgrdata, buf2, sizeof (buf2))) { if (user != NULL && user[0] != '-') blacklist_store_name (user, ent); } - endnetgrent (); + __internal_endnetgrent (&netgrdata); continue; } @@ -435,8 +565,9 @@ getspent_next_file (struct spwd *result, ent_t *ent, ent->first = TRUE; copy_spwd_changes (&ent->pwd, result, NULL, 0); - status = getspent_next_netgr (result, ent, &result->sp_namp[2], - buffer, buflen); + status = getspent_next_nis_netgr (NULL, result, ent, + &result->sp_namp[2], + buffer, buflen); if (status == NSS_STATUS_RETURN) continue; else @@ -455,50 +586,20 @@ getspent_next_file (struct spwd *result, ent_t *ent, if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0' && result->sp_namp[1] != '@') { - char *domain; - char *outval; - int outvallen; - struct spwd pwd; - - memset (&pwd, '\0', sizeof (struct spwd)); - - if (yp_get_default_domain (&domain) != YPERR_SUCCESS) - /* XXX Should we regard this as an fatal error? I don't - think so. Just continue working. --drepper@gnu */ - continue; - - if (yp_match (domain, "shadow.byname", &result->sp_namp[1], - strlen (result->sp_namp) - 1, &outval, &outvallen) - != YPERR_SUCCESS) - continue; - - copy_spwd_changes (&pwd, result, NULL, 0); + enum nss_status status; - p2len = spwd_need_buflen (&pwd); - if (p2len > buflen) - { - __set_errno (ERANGE); - return NSS_STATUS_TRYAGAIN; - } - p2 = buffer + (buflen - p2len); - buflen -= p2len; - p = strncpy (buffer, outval, buflen); - while (isspace (*p)) - p++; - free (outval); - if (_nss_files_parse_spent (p, result, data, buflen)) - { - copy_spwd_changes (result, &pwd, p2, p2len); - give_spwd_free (&pwd); - /* We found the entry. */ - break; - } - else - { - /* Give buffer the old len back */ - buflen += p2len; - give_spwd_free (&pwd); - } + /* Store the User in the blacklist for the "+" at the end of + /etc/passwd */ + blacklist_store_name (&result->sp_namp[1], ent); + status = getspnam_plususer (&result->sp_namp[1], result, buffer, + buflen); + if (status == NSS_STATUS_SUCCESS) /* We found the entry. */ + break; + else + if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */ + continue; + else + return status; } /* +:... */ @@ -526,16 +627,19 @@ internal_getspent_r (struct spwd *pw, ent_t *ent, /* We are searching members in a netgroup */ /* Since this is not the first call, we don't need the group name */ - status = getspent_next_netgr (pw, ent, NULL, buffer, buflen); + status = getspent_next_nis_netgr (NULL, pw, ent, NULL, buffer, buflen); if (status == NSS_STATUS_RETURN) return getspent_next_file (pw, ent, buffer, buflen); else return status; } - else if (ent->nis) - return getspent_next_nis (pw, ent, buffer, buflen); else - return getspent_next_file (pw, ent, buffer, buflen); + if (ent->nis) + { + return getspent_next_nis (pw, ent, buffer, buflen); + } + else + return getspent_next_file (pw, ent, buffer, buflen); } enum nss_status @@ -545,7 +649,6 @@ _nss_compat_getspent_r (struct spwd *pwd, char *buffer, size_t buflen) __libc_lock_lock (lock); - /* Be prepared that the setspent function was not called before. */ if (ext_ent.stream == NULL) status = internal_setspent (&ext_ent); @@ -557,6 +660,143 @@ _nss_compat_getspent_r (struct spwd *pwd, char *buffer, size_t buflen) return status; } +/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */ +static enum nss_status +internal_getspnam_r (const char *name, struct spwd *result, ent_t *ent, + char *buffer, size_t buflen) +{ + struct parser_data *data = (void *) buffer; + + while (1) + { + fpos_t pos; + char *p; + int parse_res; + + do + { + fgetpos (ent->stream, &pos); + p = fgets (buffer, buflen, ent->stream); + if (p == NULL) + return NSS_STATUS_NOTFOUND; + + /* Terminate the line for any case. */ + buffer[buflen - 1] = '\0'; + + /* Skip leading blanks. */ + while (isspace (*p)) + ++p; + } + while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */ + /* Parse the line. If it is invalid, loop to + get the next line of the file to parse. */ + !(parse_res = _nss_files_parse_spent (p, result, data, buflen))); + + if (parse_res == -1) + { + /* The parser ran out of space. */ + fsetpos (ent->stream, &pos); + __set_errno (ERANGE); + return NSS_STATUS_TRYAGAIN; + } + + /* This is a real entry. */ + if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-') + { + if (strcmp (result->sp_namp, name) == 0) + return NSS_STATUS_SUCCESS; + else + continue; + } + + /* -@netgroup */ + if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@' + && result->sp_namp[2] != '\0') + { + char buf2[1024]; + char *user, *host, *domain; + struct __netgrent netgrdata; + + bzero (&netgrdata, sizeof (struct __netgrent)); + __internal_setnetgrent (&result->sp_namp[2], &netgrdata); + while (__internal_getnetgrent_r (&host, &user, &domain, + &netgrdata, buf2, sizeof (buf2))) + { + if (user != NULL && user[0] != '-') + if (strcmp (user, name) == 0) + return NSS_STATUS_NOTFOUND; + } + __internal_endnetgrent (&netgrdata); + continue; + } + + /* +@netgroup */ + if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@' + && result->sp_namp[2] != '\0') + { + char buf[strlen (result->sp_namp)]; + int status; + + strcpy (buf, &result->sp_namp[2]); + ent->netgroup = TRUE; + ent->first = TRUE; + copy_spwd_changes (&ent->pwd, result, NULL, 0); + + do + { + status = getspent_next_nis_netgr (name, result, ent, buf, + buffer, buflen); + if (status == NSS_STATUS_RETURN) + continue; + + if (status == NSS_STATUS_SUCCESS && + strcmp (result->sp_namp, name) == 0) + return NSS_STATUS_SUCCESS; + } while (status == NSS_STATUS_SUCCESS); + continue; + } + + /* -user */ + if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0' + && result->sp_namp[1] != '@') + { + if (strcmp (&result->sp_namp[1], name) == 0) + return NSS_STATUS_NOTFOUND; + else + continue; + } + + /* +user */ + if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0' + && result->sp_namp[1] != '@') + { + if (strcmp (name, &result->sp_namp[1]) == 0) + { + enum nss_status status; + + status = getspnam_plususer (name, result, buffer, buflen); + if (status == NSS_STATUS_RETURN) + /* We couldn't parse the entry */ + return NSS_STATUS_NOTFOUND; + else + return status; + } + } + + /* +:... */ + if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0') + { + enum nss_status status; + + status = getspnam_plususer (name, result, buffer, buflen); + if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */ + return NSS_STATUS_NOTFOUND; + else + return status; + } + } + return NSS_STATUS_SUCCESS; +} enum nss_status _nss_compat_getspnam_r (const char *name, struct spwd *pwd, @@ -573,12 +813,10 @@ _nss_compat_getspnam_r (const char *name, struct spwd *pwd, if (status != NSS_STATUS_SUCCESS) return status; - while ((status = internal_getspent_r (pwd, &ent, buffer, buflen)) - == NSS_STATUS_SUCCESS) - if (strcmp (pwd->sp_namp, name) == 0) - break; + status = internal_getspnam_r (name, pwd, &ent, buffer, buflen); internal_endspent (&ent); + return status; } @@ -628,15 +866,19 @@ blacklist_store_name (const char *name, ent_t *ent) return; } -/* returns TRUE if ent->blacklist contains name, else FALSE */ +/* Returns TRUE if ent->blacklist contains name, else FALSE. */ static bool_t in_blacklist (const char *name, int namelen, ent_t *ent) { char buf[namelen + 3]; + char *cp; if (ent->blacklist.data == NULL) return FALSE; - stpcpy (stpcpy (stpcpy (buf, "|"), name), "|"); + buf[0] = '|'; + cp = stpcpy (&buf[1], name); + *cp++= '|'; + *cp = '\0'; return strstr (ent->blacklist.data, buf) != NULL; } |