--- /dev/null
+/*
+ * Copyright 2000, International Business Machines Corporation and others.
+ * All Rights Reserved.
+ *
+ * This software has been released under the terms of the IBM Public
+ * License. For details, see the LICENSE file in the top-level source
+ * directory or online at http://www.openafs.org/dl/license10.html
+ */
+
+#include <afsconfig.h>
+#include <afs/param.h>
+
+RCSID
+ ("$Header$");
+
+#if defined(AFS_AIX51_ENV)
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#include <locale.h>
+#include <nl_types.h>
+#include <pwd.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <errno.h>
+#include <usersec.h>
+
+#include <krb5.h>
+
+#include <afs/cellconfig.h>
+#include <afs/dirpath.h>
+#include <rx/rxkad.h>
+#include <afs/auth.h>
+#include "aix_auth_prototypes.h"
+
+struct afsconf_cell ak_cellconfig; /* General information about the cell */
+static char linkedcell[MAXCELLCHARS+1];
+static krb5_ccache _krb425_ccache = NULL;
+
+#define AFSKEY "afs"
+#define AFSINST ""
+
+#ifndef ANAME_SZ
+#define ANAME_SZ 40
+#endif /* ANAME_SZ */
+#ifndef REALM_SZ
+#define REALM_SZ 40
+#endif /* REALM_SZ */
+#ifndef SNAME_SZ
+#define SNAME_SZ 40
+#endif /* SNAME_SZ */
+#ifndef INST_SZ
+#define INST_SZ 40
+#endif /* INST_SZ */
+
+/*
+ * Why doesn't AFS provide these prototypes?
+ */
+
+extern int pioctl(char *, afs_int32, struct ViceIoctl *, afs_int32);
+
+/*
+ * Other prototypes
+ */
+
+static krb5_error_code get_credv5(krb5_context context, char *, char *,
+ char *, krb5_creds **);
+static int get_user_realm(krb5_context, char *);
+
+#if defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
+
+#define get_princ_str(c, p, n) krb5_princ_component(c, p, n)->data
+#define get_princ_len(c, p, n) krb5_princ_component(c, p, n)->length
+#define second_comp(c, p) (krb5_princ_size(c, p) > 1)
+#define realm_data(c, p) krb5_princ_realm(c, p)->data
+#define realm_len(c, p) krb5_princ_realm(c, p)->length
+
+#elif defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
+
+#define get_princ_str(c, p, n) krb5_principal_get_comp_string(c, p, n)
+#define get_princ_len(c, p, n) strlen(krb5_principal_get_comp_string(c, p, n))
+#define second_comp(c, p) (krb5_principal_get_comp_string(c, p, 1) != NULL)
+#define realm_data(c, p) krb5_realm_data(krb5_principal_get_realm(c, p))
+#define realm_len(c, p) krb5_realm_length(krb5_principal_get_realm(c, p))
+
+#else
+#error "Must have either krb5_princ_size or krb5_principal_get_comp_string"
+#endif
+
+#if defined(HAVE_KRB5_CREDS_KEYBLOCK)
+
+#define get_cred_keydata(c) c->keyblock.contents
+#define get_cred_keylen(c) c->keyblock.length
+#define get_creds_enctype(c) c->keyblock.enctype
+
+#elif defined(HAVE_KRB5_CREDS_SESSION)
+
+#define get_cred_keydata(c) c->session.keyvalue.data
+#define get_cred_keylen(c) c->session.keyvalue.length
+#define get_creds_enctype(c) c->session.keytype
+
+#else
+#error "Must have either keyblock or session member of krb5_creds"
+#endif
+
+char *afs_realm_of_cell(krb5_context context, struct afsconf_cell *cellconfig, int fallback)
+{
+ static char krbrlm[REALM_SZ+1];
+ char **hrealms = 0;
+ krb5_error_code retval;
+
+ if (!cellconfig)
+ return 0;
+
+ if (fallback) {
+ char * p;
+ p = strchr(cellconfig->hostName[0], '.');
+ if (p++)
+ strcpy(krbrlm, p);
+ else
+ strcpy(krbrlm, cellconfig->name);
+ for (p=krbrlm; *p; p++) {
+ if (islower(*p))
+ *p = toupper(*p);
+ }
+ } else {
+ if (retval = krb5_get_host_realm(context,
+ cellconfig->hostName[0], &hrealms))
+ return 0;
+ if(!hrealms[0]) return 0;
+ strcpy(krbrlm, hrealms[0]);
+
+ if (hrealms) krb5_free_host_realm(context, hrealms);
+ }
+ return krbrlm;
+}
+
+int
+aklog_authenticate(char *userName, char *response, int *reenter, char **message)
+{
+ char *reason, *pword, prompt[256];
+ struct passwd *pwd;
+ int code, unixauthneeded, password_expires = -1;
+ int status;
+ krb5_context context;
+
+ krb5_init_context(&context);
+ *reenter = 0;
+ *message = (char *)0;
+
+#if 0
+ if ((pwd = getpwnam(userName)) == NULL) {
+ *message = (char *)malloc(256);
+ sprintf(*message, "getpwnam for user failed\n");
+ return AUTH_FAILURE;
+ }
+#endif
+
+ status = auth_to_cell(context, NULL, NULL);
+ if (status) {
+ *message = (char *)malloc(1024);
+ sprintf(*message, "Unable to obtain AFS tokens: %s.\n",
+ afs_error_message(status));
+ return AUTH_FAILURE; /* NOTFOUND? */
+ }
+
+#if 0
+ /*
+ * Local hack - if the person has a file in their home
+ * directory called ".xlog", read that for a list of
+ * extra cells to authenticate to
+ */
+
+ if ((pwd = getpwuid(getuid())) != NULL) {
+ struct stat sbuf;
+ FILE *f;
+ char fcell[100], xlog_path[512];
+
+ strcpy(xlog_path, pwd->pw_dir);
+ strcat(xlog_path, "/.xlog");
+
+ if ((stat(xlog_path, &sbuf) == 0) &&
+ ((f = fopen(xlog_path, "r")) != NULL)) {
+
+ while (fgets(fcell, 100, f) != NULL) {
+ int auth_status;
+
+ fcell[strlen(fcell) - 1] = '\0';
+
+ auth_status = auth_to_cell(context, fcell, NULL);
+ if (status == AKLOG_SUCCESS)
+ status = auth_status;
+ else
+ status = AKLOG_SOMETHINGSWRONG;
+ }
+ }
+ }
+#endif
+ return AUTH_SUCCESS;
+}
+
+static krb5_error_code get_credv5(krb5_context context,
+ char *name, char *inst, char *realm,
+ krb5_creds **creds)
+{
+ krb5_creds increds;
+ krb5_error_code r;
+ static krb5_principal client_principal = 0;
+
+ memset((char *)&increds, 0, sizeof(increds));
+ /* instance may be ptr to a null string. Pass null then */
+ if ((r = krb5_build_principal(context, &increds.server,
+ strlen(realm), realm,
+ name,
+ (inst && strlen(inst)) ? inst : (void *) NULL,
+ (void *) NULL))) {
+ return r;
+ }
+
+ if (!_krb425_ccache) {
+ r = krb5_cc_default(context, &_krb425_ccache);
+ if (r)
+ return r;
+ }
+ if (!client_principal) {
+ r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal);
+ if (r)
+ return r;
+ }
+
+ increds.client = client_principal;
+ increds.times.endtime = 0;
+ /* Ask for DES since that is what V4 understands */
+ get_creds_enctype((&increds)) = ENCTYPE_DES_CBC_CRC;
+
+ r = krb5_get_credentials(context, 0, _krb425_ccache, &increds, creds);
+
+ return r;
+}
+
+
+static int get_user_realm(krb5_context context, char *realm)
+{
+ static krb5_principal client_principal = 0;
+ int i;
+
+ if (!_krb425_ccache)
+ krb5_cc_default(context, &_krb425_ccache);
+ if (!client_principal)
+ krb5_cc_get_principal(context, _krb425_ccache, &client_principal);
+
+ i = realm_len(context, client_principal);
+ if (i > REALM_SZ-1) i = REALM_SZ-1;
+ strncpy(realm,realm_data(context, client_principal), i);
+ realm[i] = 0;
+
+ return 0;
+}
+
+int
+aklog_chpass(char *userName, char *oldPasswd, char *newPasswd, char **message)
+{
+ return AUTH_SUCCESS;
+}
+
+int
+aklog_passwdexpired(char *userName, char **message)
+{
+ return AUTH_SUCCESS;
+}
+
+int
+aklog_passwdrestrictions(char *userName, char *newPasswd, char *oldPasswd,
+ char **message)
+{
+ return AUTH_SUCCESS;
+}
+
+char *
+aklog_getpasswd(char * userName)
+{
+ errno = ENOSYS;
+ return NULL;
+}
+
+
+static int get_cellconfig(char *cell, struct afsconf_cell *cellconfig, char *local_cell, char *linkedcell)
+{
+ int status = 0;
+ struct afsconf_dir *configdir;
+
+ memset(local_cell, 0, sizeof(local_cell));
+ memset((char *)cellconfig, 0, sizeof(*cellconfig));
+
+ if (!(configdir = afsconf_Open(AFSDIR_CLIENT_ETC_DIRPATH))) {
+ return AFSCONF_NODB;
+ }
+
+ if (afsconf_GetLocalCell(configdir, local_cell, MAXCELLCHARS)) {
+ return AFSCONF_FAILURE;
+ }
+
+ if ((cell == NULL) || (cell[0] == 0))
+ cell = local_cell;
+
+ linkedcell[0] = '\0';
+ if (afsconf_GetCellInfo(configdir, cell, NULL, cellconfig)) {
+ status = AFSCONF_NOTFOUND;
+ }
+ if (cellconfig->linkedCell)
+ strncpy(linkedcell,cellconfig->linkedCell,MAXCELLCHARS);
+
+ (void) afsconf_Close(configdir);
+
+ return(status);
+}
+
+/*
+ * Log to a cell. If the cell has already been logged to, return without
+ * doing anything. Otherwise, log to it and mark that it has been logged
+ * to.
+ */
+static int auth_to_cell(krb5_context context, char *cell, char *realm)
+{
+ int status = 0;
+ char username[BUFSIZ]; /* To hold client username structure */
+ afs_int32 viceId; /* AFS uid of user */
+
+ char name[ANAME_SZ]; /* Name of afs key */
+ char primary_instance[INST_SZ]; /* Instance of afs key */
+ char secondary_instance[INST_SZ]; /* Backup instance to try */
+ int try_secondary = 0; /* Flag to indicate if we try second */
+ char realm_of_user[REALM_SZ]; /* Kerberos realm of user */
+ char realm_of_cell[REALM_SZ]; /* Kerberos realm of cell */
+ char local_cell[MAXCELLCHARS+1];
+ char cell_to_use[MAXCELLCHARS+1]; /* Cell to authenticate to */
+ static char lastcell[MAXCELLCHARS+1] = { 0 };
+ static char confname[512] = { 0 };
+ krb5_creds *v5cred = NULL;
+ struct ktc_principal aserver;
+ struct ktc_principal aclient;
+ struct ktc_token atoken, btoken;
+ int afssetpag = 1;
+
+ memset(name, 0, sizeof(name));
+ memset(primary_instance, 0, sizeof(primary_instance));
+ memset(secondary_instance, 0, sizeof(secondary_instance));
+ memset(realm_of_user, 0, sizeof(realm_of_user));
+ memset(realm_of_cell, 0, sizeof(realm_of_cell));
+
+ if (confname[0] == '\0') {
+ strncpy(confname, AFSDIR_CLIENT_ETC_DIRPATH, sizeof(confname));
+ confname[sizeof(confname) - 2] = '\0';
+ }
+
+ /* NULL or empty cell returns information on local cell */
+ if ((status = get_cellconfig(cell, &ak_cellconfig,
+ local_cell, linkedcell)))
+ return(status);
+
+ strncpy(cell_to_use, ak_cellconfig.name, MAXCELLCHARS);
+ cell_to_use[MAXCELLCHARS] = 0;
+
+ /*
+ * Find out which realm we're supposed to authenticate to. If one
+ * is not included, use the kerberos realm found in the credentials
+ * cache.
+ */
+
+ if (realm && realm[0]) {
+ strcpy(realm_of_cell, realm);
+ }
+ else {
+ char *afs_realm = afs_realm_of_cell(context, &ak_cellconfig, FALSE);
+
+ if (!afs_realm) {
+ return AFSCONF_FAILURE;
+ }
+
+ strcpy(realm_of_cell, afs_realm);
+ }
+
+ /* We use the afs.<cellname> convention here...
+ *
+ * Doug Engert's original code had principals of the form:
+ *
+ * "afsx/cell@realm"
+ *
+ * in the KDC, so the name wouldn't conflict with DFS. Since we're
+ * not using DFS, I changed it just to look for the following
+ * principals:
+ *
+ * afs/<cell>@<realm>
+ * afs@<realm>
+ *
+ * Because people are transitioning from afs@realm to afs/cell,
+ * we configure things so that if the first one isn't found, we
+ * try the second one. You can select which one you prefer with
+ * a configure option.
+ */
+
+ strcpy(name, AFSKEY);
+
+ if (1 || strcasecmp(cell_to_use, realm_of_cell) != 0) {
+ strncpy(primary_instance, cell_to_use, sizeof(primary_instance));
+ primary_instance[sizeof(primary_instance)-1] = '\0';
+ if (strcasecmp(cell_to_use, realm_of_cell) == 0) {
+ try_secondary = 1;
+ secondary_instance[0] = '\0';
+ }
+ } else {
+ primary_instance[0] = '\0';
+ try_secondary = 1;
+ strncpy(secondary_instance, cell_to_use,
+ sizeof(secondary_instance));
+ secondary_instance[sizeof(secondary_instance)-1] = '\0';
+ }
+
+ /*
+ * Extract the session key from the ticket file and hand-frob an
+ * afs style authenticator.
+ */
+
+ /*
+ * Try to obtain AFS tickets. Because there are two valid service
+ * names, we will try both, but trying the more specific first.
+ *
+ * afs/<cell>@<realm> i.e. allow for single name with "."
+ * afs@<realm>
+ */
+
+ status = get_credv5(context, name, primary_instance, realm_of_cell,
+ &v5cred);
+
+ if ((status == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN ||
+ status == KRB5KRB_ERR_GENERIC) && !realm_of_cell[0]) {
+ char *afs_realm = afs_realm_of_cell(context, &ak_cellconfig, TRUE);
+
+ if (!afs_realm) {
+ return AFSCONF_FAILURE;
+ }
+
+ strcpy(realm_of_cell, afs_realm);
+
+ if (strcasecmp(cell_to_use, realm_of_cell) == 0) {
+ try_secondary = 1;
+ secondary_instance[0] = '\0';
+ }
+
+ status = get_credv5(context, name, primary_instance, realm_of_cell,
+ &v5cred);
+
+ }
+ if (status == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN ||
+ status == KRB5KRB_ERR_GENERIC) {
+ if (try_secondary)
+ status = get_credv5(context, name, secondary_instance,
+ realm_of_cell, &v5cred);
+ }
+
+ if (status) {
+ return status;
+ }
+
+ strncpy(aserver.name, AFSKEY, MAXKTCNAMELEN - 1);
+ strncpy(aserver.instance, AFSINST, MAXKTCNAMELEN - 1);
+ strncpy(aserver.cell, cell_to_use, MAXKTCREALMLEN - 1);
+
+ /*
+ * The default is to use rxkad2b, which means we put in a full
+ * V5 ticket. If the user specifies -524, we talk to the
+ * 524 ticket converter.
+ */
+
+ {
+ char *p;
+ int len;
+
+ len = min(get_princ_len(context, v5cred->client, 0),
+ second_comp(context, v5cred->client) ?
+ MAXKTCNAMELEN - 2 : MAXKTCNAMELEN - 1);
+ strncpy(username, get_princ_str(context, v5cred->client, 0), len);
+ username[len] = '\0';
+
+ if (second_comp(context, v5cred->client)) {
+ strcat(username, ".");
+ p = username + strlen(username);
+ len = min(get_princ_len(context, v5cred->client, 1),
+ MAXKTCNAMELEN - strlen(username) - 1);
+ strncpy(p, get_princ_str(context, v5cred->client, 1), len);
+ p[len] = '\0';
+ }
+
+ memset(&atoken, 0, sizeof(atoken));
+ atoken.kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
+ atoken.startTime = v5cred->times.starttime;;
+ atoken.endTime = v5cred->times.endtime;
+ memcpy(&atoken.sessionKey, get_cred_keydata(v5cred),
+ get_cred_keylen(v5cred));
+ atoken.ticketLen = v5cred->ticket.length;
+ memcpy(atoken.ticket, v5cred->ticket.data, atoken.ticketLen);
+ }
+
+ if ((status = get_user_realm(context, realm_of_user))) {
+ return KRB5_REALM_UNKNOWN;
+ }
+ if (strcmp(realm_of_user, realm_of_cell)) {
+ strcat(username, "@");
+ strcat(username, realm_of_user);
+ }
+
+ strcpy(lastcell, aserver.cell);
+
+ if (!pr_Initialize (0, confname, aserver.cell))
+ status = pr_SNameToId (username, &viceId);
+
+ /*
+ * This is a crock, but it is Transarc's crock, so
+ * we have to play along in order to get the
+ * functionality. The way the afs id is stored is
+ * as a string in the username field of the token.
+ * Contrary to what you may think by looking at
+ * the code for tokens, this hack (AFS ID %d) will
+ * not work if you change %d to something else.
+ */
+
+ /* Reset the "aclient" structure before we call ktc_SetToken.
+ * This structure was first set by the ktc_GetToken call when
+ * we were comparing whether identical tokens already existed.
+ */
+ strncpy(aclient.name, username, MAXKTCNAMELEN - 1);
+ strcpy(aclient.instance, "");
+ strncpy(aclient.cell, realm_of_user, MAXKTCREALMLEN - 1);
+
+ /* on AIX 4.1.4 with AFS 3.4a+ if a write is not done before
+ * this routine, it will not add the token. It is not clear what
+ * is going on here! So we will do the following operation
+ */
+ write(2,"",0); /* dummy write */
+ status = ktc_SetToken(&aserver, &atoken, &aclient, afssetpag);
+
+ return(status);
+}
+
+int
+aklog_initialize(struct secmethod_table *meths)
+{
+ memset(meths, 0, sizeof(struct secmethod_table));
+
+ /*
+ * Initialize the exported interface routines.
+ * Aside from method_authenticate, these are just no-ops.
+ */
+ meths->method_chpass = aklog_chpass;
+ meths->method_authenticate = aklog_authenticate;
+ meths->method_passwdexpired = aklog_passwdexpired;
+ meths->method_passwdrestrictions = aklog_passwdrestrictions;
+ meths->method_getpasswd = aklog_getpasswd;
+
+ return (0);
+}
+#endif /* AFS_AIX51_ENV */
projects / packages / o / openafs.git / commitdiff