Bugzilla – Attachment 20 Details for
Bug 103
new openbsd-compat/bsd-cray.c file
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updated openbsd-compat/bsd-cray.c
bsd-cray.c (text/plain), 20.22 KB, created by
wendy palm
on 2002-02-05 06:45:43 AEDT
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Description:
updated openbsd-compat/bsd-cray.c
Filename:
MIME Type:
Creator:
wendy palm
Created:
2002-02-05 06:45:43 AEDT
Size:
20.22 KB
patch
obsolete
>/* > * bsd-cray.c > * > * (C) COPYRIGHT CRAY, INC. > * ALL RIGHTS RESERVED. > * > * This file contains the functions required for proper execution > * on UNICOS systems. > * > */ > >#ifdef _CRAY > >#include <udb.h> >#include <tmpdir.h> >#include <unistd.h> >#include <sys/category.h> >#include <utmp.h> >#include <sys/jtab.h> >#include <signal.h> >#include <sys/priv.h> >#include <sys/secparm.h> >#include <sys/usrv.h> >#include <sys/sysv.h> >#include <sys/sectab.h> >#include <sys/secstat.h> >#include <sys/stat.h> >#include <stdlib.h> >#include <pwd.h> >#include <fcntl.h> >#include <errno.h> >#include <ia.h> >#include "ssh.h" >#include "log.h" >#include "servconf.h" >#include "bsd-cray.h" > >#define MAXACID 80 > >extern ServerOptions options; > >char cray_tmpdir[TPATHSIZ+1]; /* job TMPDIR path */ > >/* > * Functions. > */ >void cray_retain_utmp(struct utmp *, int); >void cray_delete_tmpdir(char *, int, uid_t); >void cray_init_job(struct passwd *); >void cray_set_tmpdir(struct utmp *); >void cray_login_failure(char *, int); >int cray_setup(uid_t, char *, const char *); >int cray_access_denied(char *); > >void >cray_login_failure(char *username, int errcode) >{ > struct udb *ueptr; /* UDB pointer for username */ > ia_failure_t fsent; /* ia_failure structure */ > ia_failure_ret_t fret; /* ia_failure return stuff */ > struct jtab jtab; /* job table structure */ > int jid = 0; /* job id */ > > if ((jid = getjtab(&jtab)) < 0) { > debug("cray_login_failure(): getjtab error"); > } > getsysudb(); > if ((ueptr = getudbnam(username)) == UDB_NULL) { > debug("cray_login_failure(): getudbname() returned NULL"); > } > endudb(); > fsent.revision = 0; > fsent.uname = username; > fsent.host = (char *)get_canonical_hostname(options.reverse_mapping_check); > fsent.ttyn = "sshd"; > fsent.caller = IA_SSHD; > fsent.flags = IA_INTERACTIVE; > fsent.ueptr = ueptr; > fsent.jid = jid; > fsent.errcode = errcode; > fsent.pwdp = NULL; > fsent.exitcode = 0; /* dont exit in ia_failure() */ > > fret.revision = 0; > fret.normal = 0; > > /* > * Call ia_failure because of an login failure. > */ > ia_failure(&fsent,&fret); >} > >/* > * Cray access denied > */ >int >cray_access_denied(char *username) >{ > struct udb *ueptr; /* UDB pointer for username */ > int errcode; /* IA errorcode */ > > errcode = 0; > getsysudb(); > if ((ueptr = getudbnam(username)) == UDB_NULL) { > debug("cray_login_failure(): getudbname() returned NULL"); > } > endudb(); > if (ueptr && ueptr->ue_disabled) > errcode = IA_DISABLED; > if (errcode) > cray_login_failure(username, errcode); > return (errcode); >} > >int >cray_setup (uid_t uid, char *username, const char *command) >{ > extern struct udb *getudb(); > extern char *setlimits(); > > int err; /* error return */ > time_t system_time; /* current system clock */ > time_t expiration_time; /* password expiration time */ > int maxattempts; /* maximum no. of failed login attempts */ > int SecureSys; /* unicos security flag */ > int minslevel = 0; /* system minimum security level */ > int i, j; > int valid_acct = -1; /* flag for reading valid acct */ > char acct_name[MAXACID] = { "" }; /* used to read acct name */ > struct jtab jtab; /* Job table struct */ > struct udb ue; /* udb entry for logging-in user */ > struct udb *up; /* pointer to UDB entry */ > struct sysv sysv; /* system security structure */ > struct usrv usrv; /* user security structure */ > struct secstat secinfo; /* file security attributes */ > int jid; /* job ID */ > int pid; /* process ID */ > char *sr; /* status return from setlimits() */ > char *ttyn = NULL; /* ttyname or command name*/ > char hostname[MAXHOSTNAMELEN]; > passwd_t pwdacm, > pwddialup, > pwdudb, > pwdwal, > pwddce; /* passwd stuff for ia_user */ > ia_user_ret_t uret; /* stuff returned from ia_user */ > ia_user_t usent; /* ia_user main structure */ > int ia_rcode; /* ia_user return code */ > ia_failure_t fsent; /* ia_failure structure */ > ia_failure_ret_t fret; /* ia_failure return stuff */ > ia_success_t ssent; /* ia_success structure */ > ia_success_ret_t sret; /* ia_success return stuff */ > int ia_mlsrcode; /* ia_mlsuser return code */ > int secstatrc; /* [f]secstat return code */ > > if (SecureSys = (int)sysconf(_SC_CRAY_SECURE_SYS)) { > getsysv(&sysv, sizeof(struct sysv)); > minslevel = sysv.sy_minlvl; > if (getusrv(&usrv) < 0) { > debug("getusrv() failed, errno = %d",errno); > exit(1); > } > } > hostname[0] = '\0'; > strncpy(hostname, > (char *)get_canonical_hostname(options.reverse_mapping_check), > MAXHOSTNAMELEN); > /* > * Fetch user's UDB entry. > */ > getsysudb(); > if ((up = getudbnam(username)) == UDB_NULL) { > debug("cannot fetch user's UDB entry"); > exit(1); > } > > /* > * Prevent any possible fudging so perform a data > * safety check and compare the supplied uid against > * the udb's uid. > */ > if (up->ue_uid != uid) { > debug("IA uid missmatch"); > exit(1); > } > endudb(); > > if ((jid = getjtab (&jtab)) < 0) { > debug("getjtab"); > return -1; > } > pid = getpid(); > ttyn = ttyname(0); > if (SecureSys) { > if (ttyn) { > secstatrc = secstat(ttyn, &secinfo); > } else { > secstatrc = fsecstat(1, &secinfo); > } > if (secstatrc == 0) { > debug("[f]secstat() successful"); > } else { > debug("[f]secstat() error, rc = %d", secstatrc); > exit(1); > } > } > if ((ttyn == NULL) && ((char *)command != NULL)) > ttyn = (char *)command; > /* > * Initialize all structures to call ia_user > */ > usent.revision = 0; > usent.uname = username; > usent.host = hostname; > usent.ttyn = ttyn; > usent.caller = IA_SSHD; > usent.pswdlist = &pwdacm; > usent.ueptr = &ue; > usent.flags = IA_INTERACTIVE | IA_FFLAG; > pwdacm.atype = IA_SECURID; > pwdacm.pwdp = NULL; > pwdacm.next = &pwdudb; > > pwdudb.atype = IA_UDB; > pwdudb.pwdp = NULL; > pwdudb.next = &pwddce; > > pwddce.atype = IA_DCE; > pwddce.pwdp = NULL; > pwddce.next = &pwddialup; > > pwddialup.atype = IA_DIALUP; > pwddialup.pwdp = NULL; > /* pwddialup.next = &pwdwal; */ > pwddialup.next = NULL; > > pwdwal.atype = IA_WAL; > pwdwal.pwdp = NULL; > pwdwal.next = NULL; > > uret.revision = 0; > uret.pswd = NULL; > uret.normal = 0; > > ia_rcode = ia_user(&usent, &uret); > > switch (ia_rcode) { > /* > * These are acceptable return codes from ia_user() > */ > case IA_UDBWEEK: /* Password Expires in 1 week */ > expiration_time = ue.ue_pwage.time + ue.ue_pwage.maxage; > printf ("WARNING - your current password will expire %s\n", > ctime((const time_t *)&expiration_time)); > break; > case IA_UDBEXPIRED: > if (ttyname(0) != NULL) { > /* Force a password change */ > printf("Your password has expired; Choose a new one.\n"); > execl("/bin/passwd", "passwd", username, 0); > exit(9); > } > > break; > case IA_NORMAL: /* Normal Return Code */ > break; > case IA_BACKDOOR: > strcpy(ue.ue_name, "root"); > strcpy(ue.ue_passwd, ""); > strcpy(ue.ue_dir, "/"); > strcpy(ue.ue_shell, "/bin/sh"); > strcpy(ue.ue_age, ""); > strcpy(ue.ue_comment, ""); > strcpy(ue.ue_loghost, ""); > strcpy(ue.ue_logline, ""); > ue.ue_uid=-1; > ue.ue_nice[UDBRC_INTER]=0; > for (i=0;i<MAXVIDS;i++) > ue.ue_gids[i]=0; > ue.ue_logfails=0; > ue.ue_minlvl=minslevel; > ue.ue_maxlvl=minslevel; > ue.ue_deflvl=minslevel; > ue.ue_defcomps=0; > ue.ue_comparts=0; > ue.ue_permits=0; > ue.ue_trap=0; > ue.ue_disabled=0; > ue.ue_logtime=0; > break; > case IA_CONSOLE: /* Superuser not from Console */ > case IA_TRUSTED: /* Trusted user */ > if (options.permit_root_login > PERMIT_NO) > break; /* Accept root login */ > default: > /* > * These are failed return codes from ia_user() > */ > switch (ia_rcode) > { > case IA_BADAUTH: > printf ("Bad authorization, access denied.\n"); > break; > case IA_DIALUPERR: > break; > case IA_DISABLED: > printf ("Your login has been disabled. Contact the system "); > printf ("administrator for assistance.\n"); > break; > case IA_GETSYSV: > printf ("getsysv() failed - errno = %d\n", errno); > break; > case IA_LOCALHOST: > break; > case IA_MAXLOGS: > printf ("Maximum number of failed login attempts exceeded.\n"); > printf ("Access denied.\n"); > break; > case IA_NOPASS: > break; > case IA_PUBLIC: > break; > case IA_SECURIDERR: > break; > case IA_CONSOLE: > break; > case IA_TRUSTED: > break; > case IA_UDBERR: > break; > case IA_UDBPWDNULL: > /* > * NULL password not allowed on MLS systems > */ > if (SecureSys) { > printf("NULL Password not allowed on MLS systems.\n"); > } > break; > case IA_UNKNOWN: > break; > case IA_UNKNOWNYP: > break; > case IA_WALERR: > break; > default: > /* nothing special */ > ; > } /* 2. switch (ia_rcode) */ > /* > * Authentication failed. > */ > printf("sshd: Login incorrect, (0%o)\n", > ia_rcode-IA_ERRORCODE); > > /* > * Initialize structure for ia_failure > * which will exit. > */ > fsent.revision = 0; > fsent.uname = username; > fsent.host = hostname; > fsent.ttyn = ttyn; > fsent.caller = IA_SSHD; > fsent.flags = IA_INTERACTIVE; > fsent.ueptr = &ue; > fsent.jid = jid; > fsent.errcode = ia_rcode; > fsent.pwdp = uret.pswd; > fsent.exitcode = 1; > > fret.revision = 0; > fret.normal = 0; > > /* > * Call ia_failure because of an IA failure. > * There is no return because ia_failure exits. > */ > > ia_failure(&fsent,&fret); > > exit(1); > } /* 1. switch (ia_rcode) */ > ia_mlsrcode = IA_NORMAL; > if (SecureSys) { > debug("calling ia_mlsuser()"); > ia_mlsrcode = ia_mlsuser (&ue, &secinfo, &usrv, NULL, 0); > } > if (ia_mlsrcode != IA_NORMAL) { > printf("sshd: Login incorrect, (0%o)\n", > ia_mlsrcode-IA_ERRORCODE); > /* > * Initialize structure for ia_failure > * which will exit. > */ > fsent.revision = 0; > fsent.uname = username; > fsent.host = hostname; > fsent.ttyn = ttyn; > fsent.caller = IA_SSHD; > fsent.flags = IA_INTERACTIVE; > fsent.ueptr = &ue; > fsent.jid = jid; > fsent.errcode = ia_mlsrcode; > fsent.pwdp = uret.pswd; > fsent.exitcode = 1; > fret.revision = 0; > fret.normal = 0; > > /* > * Call ia_failure because of an IA failure. > * There is no return because ia_failure exits. > */ > ia_failure(&fsent,&fret); > exit(1); > } > > /* Provide login status information */ > if (options.print_lastlog && ue.ue_logtime != 0) { > printf("Last successful login was : %.*s ", > 19, (char *)ctime(&ue.ue_logtime)); > > if (*ue.ue_loghost != '\0') > printf("from %.*s\n", sizeof(ue.ue_loghost), ue.ue_loghost); > > else printf("on %.*s\n", sizeof(ue.ue_logline), ue.ue_logline); > > if ( SecureSys && (ue.ue_logfails != 0)) > printf(" followed by %d failed attempts\n", ue.ue_logfails); > } > > > /* > * Call ia_success to process successful I/A. > */ > ssent.revision = 0; > ssent.uname = username; > ssent.host = hostname; > ssent.ttyn = ttyn; > ssent.caller = IA_SSHD; > ssent.flags = IA_INTERACTIVE; > ssent.ueptr = &ue; > ssent.jid = jid; > ssent.errcode = ia_rcode; > ssent.us = NULL; > ssent.time = 1; /* Set ue_logtime */ > > sret.revision = 0; > sret.normal = 0; > > ia_success(&ssent,&sret); > > /* > * Query for account, iff > 1 valid acid & askacid permbit > */ > if (((ue.ue_permbits & PERMBITS_ACCTID) || > (ue.ue_acids[0] >= 0) && (ue.ue_acids[1] >= 0)) && > ue.ue_permbits & PERMBITS_ASKACID) { > while (valid_acct == -1) { > printf("Account (? for available accounts)" > " [%s]: ", acid2nam(ue.ue_acids[0])); > gets(acct_name); > switch (acct_name[0]) { > case EOF: > exit(0); > break; > case '\0': > valid_acct = ue.ue_acids[0]; > strcpy(acct_name, acid2nam(valid_acct)); > break; > case '?': > /* Print the list 3 wide */ > for (i = 0, j = 0; i < MAXVIDS; i++) { > if (ue.ue_acids[i] == -1) { > printf("\n"); > break; > } > if (++j == 4) { > j = 1; > printf("\n"); > } > printf(" %s", > acid2nam(ue.ue_acids[i])); > } > if (ue.ue_permbits & PERMBITS_ACCTID) > printf("\"acctid\" permbit also allows" > " you to select any valid " > "account name.\n"); > printf("\n"); > break; > default: > if ((valid_acct = nam2acid(acct_name)) == -1) printf("Account id not found for" > " account name \"%s\"\n\n", > acct_name); > break; > } > /* > * If an account was given, search the user's > * acids array to verify they can use this account. > */ > if ((valid_acct != -1) && > !(ue.ue_permbits & PERMBITS_ACCTID)) { > for (i = 0; i < MAXVIDS; i++) { > if (ue.ue_acids[i] == -1) > break; > if (valid_acct == ue.ue_acids[i]) > break; > } > if (i == MAXVIDS || > ue.ue_acids[i] == -1) { > fprintf(stderr, "Cannot set" > " account name to " > "\"%s\", permission " > "denied\n\n", acct_name); > valid_acct = -1; > } > } > } > } else { > /* > * The user doesn't have the askacid permbit set or > * only has one valid account to use. > */ > valid_acct = ue.ue_acids[0]; > } > if (acctid(0, valid_acct) < 0) { > printf ("Bad account id: %d\n", valid_acct); > exit(1); > } > >/* set up shares and quotas */ >/* Now set shares, quotas, limits, including CPU time for the (interactive) > * job and process, and set up permissions (for chown etc), etc. > */ > if (setshares(ue.ue_uid, valid_acct, printf, 0, 0)) { > printf("Unable to give %d shares to <%s>(%d/%d)\n", ue.ue_shares, ue.ue_name, ue.ue_uid, valid_acct); > exit(1); > } > > sr = setlimits(username, C_PROC, pid, UDBRC_INTER); > if (sr != NULL) { > debug("%.200s", sr); > exit(1); > } > sr = setlimits(username, C_JOB, jid, UDBRC_INTER); > if (sr != NULL) { > debug("%.200s", sr); > exit(1); > } > /* > * Set user and controlling tty security attributes. > */ > if (SecureSys) { > if (setusrv(&usrv) == -1) { > debug("setusrv() failed, errno = %d",errno); > exit(1); > } > } > > return(0); >} > >/* > * The rc.* and /etc/sdaemon methods of starting a program on unicos/unicosmk > * can have pal privileges that sshd can inherit which > * could allow a user to su to root with out a password. > * This subroutine clears all privileges. > */ >void >drop_cray_privs() >{ >#if defined(_SC_CRAY_PRIV_SU) > priv_proc_t* privstate; > int result; > extern int priv_set_proc(); > extern priv_proc_t* priv_init_proc(); > struct usrv usrv; > > /* > * If ether of theses two flags are not set > * then don't allow this version of ssh to run. > */ > if (!sysconf(_SC_CRAY_PRIV_SU)) > fatal("Not PRIV_SU system."); > if (!sysconf(_SC_CRAY_POSIX_PRIV)) > fatal("Not POSIX_PRIV."); > > debug("Dropping privileges."); > > memset(&usrv, 0, sizeof(usrv)); > if (setusrv(&usrv) < 0) > fatal("%s(%d): setusrv(): %s", __FILE__, __LINE__, > strerror(errno)); > > if ((privstate = priv_init_proc()) != NULL) { > result = priv_set_proc(privstate); > if (result != 0 ) > fatal("%s(%d): priv_set_proc(): %s", > __FILE__, __LINE__, strerror(errno)); > priv_free_proc(privstate); > } > debug ("Privileges should be cleared..."); >#else > /* XXX: do this differently */ ># error Cray systems must be run with _SC_CRAY_PRIV_SU on! >#endif >} > > >/* > * Retain utmp/wtmp information - used by cray accounting. > */ >void >cray_retain_utmp(struct utmp *ut, int pid) >{ > int fd; > struct utmp utmp; > > if ((fd = open(UTMP_FILE, O_RDONLY)) != -1) { > while (read(fd, (char *)&utmp, sizeof(utmp)) == sizeof(utmp)) { > if (pid == utmp.ut_pid) { > ut->ut_jid = utmp.ut_jid; > strncpy(ut->ut_tpath, utmp.ut_tpath, sizeof(utmp.ut_tpath)); > strncpy(ut->ut_host, utmp.ut_host, sizeof(utmp.ut_host)); > strncpy(ut->ut_name, utmp.ut_name, sizeof(utmp.ut_name)); > break; > } > } > close(fd); > } > else > fatal("Unable to open utmp file"); >} > >/* > * tmpdir support. > */ > >/* > * find and delete jobs tmpdir. > */ >void >cray_delete_tmpdir(char *login, int jid, uid_t uid) >{ > int child; > static char jtmp[TPATHSIZ]; > struct stat statbuf; > int c; > int wstat; > > for (c = 'a'; c <= 'z'; c++) { > snprintf(jtmp, TPATHSIZ, "%s/jtmp.%06d%c", JTMPDIR, jid, c); > if (stat(jtmp, &statbuf) == 0 && statbuf.st_uid == uid) > break; > } > > if (c > 'z') > return; > > if ((child = fork()) == 0) { > execl(CLEANTMPCMD, CLEANTMPCMD, login, jtmp, (char *)NULL); > fatal("cray_delete_tmpdir: execl of CLEANTMPCMD failed"); > } > > while (waitpid(child, &wstat, 0) == -1 && errno == EINTR) > ; >} > >/* > * Remove tmpdir on job termination. > */ >void >cray_job_termination_handler(int sig) >{ > int jid; > char *login = NULL; > struct jtab jtab; > > debug("received signal %d",sig); > > if ((jid = waitjob(&jtab)) == -1 || > (login = uid2nam(jtab.j_uid)) == NULL) > return; > > cray_delete_tmpdir(login, jid, jtab.j_uid); >} > >/* > * Set job id and create tmpdir directory. > */ >void >cray_init_job(struct passwd *pw) >{ > int jid; > int c; > > jid = setjob(pw->pw_uid, WJSIGNAL); > if (jid < 0) > fatal("System call setjob failure"); > > for (c = 'a'; c <= 'z'; c++) { > snprintf(cray_tmpdir, TPATHSIZ, "%s/jtmp.%06d%c", JTMPDIR, jid, c); > if (mkdir(cray_tmpdir, JTMPMODE) != 0) > continue; > if (chown(cray_tmpdir, pw->pw_uid, pw->pw_gid) != 0) { > rmdir(cray_tmpdir); > continue; > } > break; > } > > if (c > 'z') > cray_tmpdir[0] = '\0'; >} > >void >cray_set_tmpdir(struct utmp *ut) >{ > int jid; > struct jtab jbuf; > > if ((jid = getjtab(&jbuf)) < 0) > return; > > /* > * Set jid and tmpdir in utmp record. > */ > ut->ut_jid = jid; > strncpy(ut->ut_tpath, cray_tmpdir, TPATHSIZ); >} >#endif
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