/* * $Id$ * * Copyright 1990,1991 by the Massachusetts Institute of Technology * For distribution and copying rights, see the file "mit-copyright.h" */ /* * Copyright (c) 2005, 2006 * The Linux Box Corporation * ALL RIGHTS RESERVED * * Permission is granted to use, copy, create derivative works * and redistribute this software and such derivative works * for any purpose, so long as the name of the Linux Box * Corporation is not used in any advertising or publicity * pertaining to the use or distribution of this software * without specific, written prior authorization. If the * above copyright notice or any other identification of the * Linux Box Corporation is included in any copy of any * portion of this software, then the disclaimer below must * also be included. * * This software is provided as is, without representation * from the Linux Box Corporation as to its fitness for any * purpose, and without warranty by the Linux Box Corporation * of any kind, either express or implied, including * without limitation the implied warranties of * merchantability and fitness for a particular purpose. The * regents of the Linux Box Corporation shall not be liable * for any damages, including special, indirect, incidental, or * consequential damages, with respect to any claim arising * out of or in connection with the use of the software, even * if it has been or is hereafter advised of the possibility of * such damages. */ #include #include #include #include #include #include #include #define KERBEROS_APPLE_DEPRECATED(x) #include #ifdef HAVE_COM_ERR_H # include #elif HAVE_ET_COM_ERR_H # include #elif HAVE_KRB5_COM_ERR_H # include #else # error No com_err.h? We need some kind of com_err.h #endif #ifndef HAVE_KERBEROSV_HEIM_ERR_H #include #endif #ifdef AFS_SUN5_ENV #include #endif #include #include #include #include #include #include #include #include #include #include "aklog.h" #include "linked_list.h" #ifdef HAVE_KRB5_CREDS_KEYBLOCK #define USING_MIT 1 #endif #ifdef HAVE_KRB5_CREDS_SESSION #define USING_HEIMDAL 1 #endif #define AFSKEY "afs" #define AFSINST "" #ifndef AFS_TRY_FULL_PRINC #define AFS_TRY_FULL_PRINC 1 #endif /* AFS_TRY_FULL_PRINC */ #define AKLOG_TRYAGAIN -1 #define AKLOG_SUCCESS 0 #define AKLOG_USAGE 1 #define AKLOG_SOMETHINGSWRONG 2 #define AKLOG_AFS 3 #define AKLOG_KERBEROS 4 #define AKLOG_TOKEN 5 #define AKLOG_BADPATH 6 #define AKLOG_MISC 7 #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif #ifndef MAXSYMLINKS /* RedHat 4.x doesn't seem to define this */ #define MAXSYMLINKS 5 #endif #define DIR '/' /* Character that divides directories */ #define DIRSTRING "/" /* String form of above */ #define VOLMARKER ':' /* Character separating cellname from mntpt */ #define VOLMARKERSTRING ":" /* String form of above */ typedef struct { char cell[BUFSIZ]; char realm[REALM_SZ]; } cellinfo_t; static krb5_ccache _krb425_ccache = NULL; /* * Why doesn't AFS provide these prototypes? */ extern int pioctl(char *, afs_int32, struct ViceIoctl *, afs_int32); /* * Other prototypes */ extern char *afs_realm_of_cell(krb5_context, struct afsconf_cell *, int); static int isdir(char *, unsigned char *); static krb5_error_code get_credv5(krb5_context context, char *, char *, char *, krb5_creds **); static int get_user_realm(krb5_context, char **); #define TRYAGAIN(x) (x == AKLOG_TRYAGAIN || \ x == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || \ x == KRB5KRB_ERR_GENERIC) #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_ENCRYPT_TKT_PART) && defined(HAVE_ENCODE_KRB5_ENC_TKT_PART) && defined(HAVE_KRB5_C_ENCRYPT) extern krb5_error_code encode_krb5_enc_tkt_part (const krb5_enc_tkt_part *rep, krb5_data **code); krb5_error_code krb5_encrypt_tkt_part(krb5_context context, const krb5_keyblock *key, krb5_ticket *ticket) { krb5_data *data = 0; int code; size_t enclen; if ((code = encode_krb5_enc_tkt_part(ticket->enc_part2, &data))) goto Done; if ((code = krb5_c_encrypt_length(context, key->enctype, data->length, &enclen))) goto Done; ticket->enc_part.ciphertext.length = enclen; if (!(ticket->enc_part.ciphertext.data = malloc(enclen))) { code = ENOMEM; goto Done; } if ((code = krb5_c_encrypt(context, key, KRB5_KEYUSAGE_KDC_REP_TICKET, 0, data, &ticket->enc_part))) { free(ticket->enc_part.ciphertext.data); ticket->enc_part.ciphertext.data = 0; } Done: if (data) { if (data->data) free(data->data); free(data); } return code; } #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 /* MITKerberosShim logs but returns success */ #if !defined(HAVE_KRB5_524_CONV_PRINCIPAL) || defined(AFS_DARWIN110_ENV) || (!defined(HAVE_KRB5_524_CONVERT_CREDS) && !defined(HAVE_KRB524_CONVERT_CREDS_KDC)) #define HAVE_NO_KRB5_524 #elif !defined(HAVE_KRB5_524_CONVERT_CREDS) && defined(HAVE_KRB524_CONVERT_CREDS_KDC) #define krb5_524_convert_creds krb524_convert_creds_kdc #endif #if USING_HEIMDAL #define deref_keyblock_enctype(kb) \ ((kb)->keytype) #define deref_entry_keyblock(entry) \ entry->keyblock #define deref_session_key(creds) \ creds->session #define deref_enc_tkt_addrs(tkt) \ tkt->caddr #define deref_enc_length(enc) \ ((enc)->cipher.length) #define deref_enc_data(enc) \ ((enc)->cipher.data) #define krb5_free_keytab_entry_contents krb5_kt_free_entry #else #define deref_keyblock_enctype(kb) \ ((kb)->enctype) #define deref_entry_keyblock(entry) \ entry->key #define deref_session_key(creds) \ creds->keyblock #define deref_enc_tkt_addrs(tkt) \ tkt->caddrs #define deref_enc_length(enc) \ ((enc)->ciphertext.length) #define deref_enc_data(enc) \ ((enc)->ciphertext.data) #endif #define deref_entry_enctype(entry) \ deref_keyblock_enctype(&deref_entry_keyblock(entry)) /* * Provide a replacement for strerror if we don't have it */ #ifndef HAVE_STRERROR extern char *sys_errlist[]; #define strerror(x) sys_errlist[x] #endif /* HAVE_STRERROR */ static char *progname = NULL; /* Name of this program */ static int dflag = FALSE; /* Give debugging information */ static int noauth = FALSE; /* If true, don't try to get tokens */ static int zsubs = FALSE; /* Are we keeping track of zephyr subs? */ static int hosts = FALSE; /* Are we keeping track of hosts? */ static int noprdb = FALSE; /* Skip resolving name to id? */ static int linked = FALSE; /* try for both AFS nodes */ static int afssetpag = FALSE; /* setpag for AFS */ static int force = FALSE; /* Bash identical tokens? */ static int do524 = FALSE; /* Should we do 524 instead of rxkad2b? */ static char *keytab = NULL; /* keytab for akimpersonate */ static char *client = NULL; /* client principal for akimpersonate */ static linked_list zsublist; /* List of zephyr subscriptions */ static linked_list hostlist; /* List of host addresses */ static linked_list authedcells; /* List of cells already logged to */ /* A com_error bodge. The idea here is that this routine lets us lookup * things in the system com_err, if the AFS one just tells us the error * is unknown */ void redirect_errors(const char *who, afs_int32 code, const char *fmt, va_list ap) { if (who) { fputs(who, stderr); fputs(": ", stderr); } if (code) { const char *str = afs_error_message(code); if (strncmp(str, "unknown", strlen("unknown")) == 0) { #ifdef HAVE_KRB5_SVC_GET_MSG krb5_svc_get_msg(code,&str); #elif defined(HAVE_KRB5_GET_ERROR_MESSAGE) krb5_context context; krb5_init_context(&context); str = krb5_get_error_message(context, code); krb5_free_context(context); #else ; /* IRIX apparently has neither: use the string we have */ #endif } fputs(str, stderr); fputs(" ", stderr); #ifdef HAVE_KRB5_SVC_GET_MSG krb5_free_string(str); #endif } if (fmt) { vfprintf(stderr, fmt, ap); } putc('\n', stderr); fflush(stderr); } static void afs_dprintf(char *fmt, ...) { va_list ap; va_start(ap, fmt); if (dflag) vprintf(fmt, ap); va_end(ap); } static char * copy_cellinfo(cellinfo_t *cellinfo) { cellinfo_t *new_cellinfo; if ((new_cellinfo = malloc(sizeof(cellinfo_t)))) memcpy(new_cellinfo, cellinfo, sizeof(cellinfo_t)); return ((char *)new_cellinfo); } static int get_cellconfig(const char *config, char *cell, struct afsconf_cell *cellconfig, char **local_cell) { int status = AKLOG_SUCCESS; struct afsconf_dir *configdir; memset(cellconfig, 0, sizeof(*cellconfig)); *local_cell = malloc(MAXCELLCHARS); if (*local_cell == NULL) { fprintf(stderr, "%s: can't allocate memory for local cell name\n", progname); exit(AKLOG_AFS); } if (!(configdir = afsconf_Open(config))) { fprintf(stderr, "%s: can't get afs configuration (afsconf_Open(%s))\n", progname, config); exit(AKLOG_AFS); } if (afsconf_GetLocalCell(configdir, *local_cell, MAXCELLCHARS)) { fprintf(stderr, "%s: can't determine local cell.\n", progname); exit(AKLOG_AFS); } if ((cell == NULL) || (cell[0] == 0)) cell = *local_cell; /* XXX - This function modifies 'cell' by passing it through lcstring */ if (afsconf_GetCellInfo(configdir, cell, NULL, cellconfig)) { fprintf(stderr, "%s: Can't get information about cell %s.\n", progname, cell); status = AKLOG_AFS; } afsconf_Close(configdir); return(status); } static char * extract_realm(krb5_context context, krb5_principal princ) { int len; char *realm; len = realm_len(context, princ); if (len > REALM_SZ-1) len = REALM_SZ-1; realm = malloc(sizeof(char) * (len+1)); if (realm == NULL) return NULL; strncpy(realm, realm_data(context, princ), len); realm[len] = '\0'; return realm; } static int get_realm_from_cred(krb5_context context, krb5_creds *v5cred, char **realm) { #if !defined(HEIMDAL) && defined(HAVE_KRB5_DECODE_TICKET) krb5_error_code code; krb5_ticket *ticket; *realm = NULL; code = krb5_decode_ticket(&v5cred->ticket, &ticket); if (code) return code; *realm = extract_realm(context, ticket->server); if (*realm == NULL) code = ENOMEM; krb5_free_ticket(context, ticket); return code; #else *realm = NULL; return 0; #endif } /*! * Get a Kerberos service ticket to use as the base of an rxkad token for * a given AFS cell. * * @param[in] context * An initialized Kerberos v5 context * @param[in] realm * The realm to look in for the service principal. If NULL, then the * realm is determined from the cell name or the user's credentials * (see below for the heuristics used) * @param[in] cell * The cell information for the cell to obtain a ticket for * @param[out] v5cred * A Kerberos credentials structure containing the ticket acquired * for the cell. This is a dynamically allocated structure, which * should be freed by using the appropriate Kerberos API function. * @param[out] realmUsed * The realm in which the cell's service principal was located. If * unset, then the principal was located in the same realm as the * current user. This is a malloc'd string which should be freed * by the caller. * * @returns * 0 on success, an error value upon failure * * @notes * This code tries principals in the following, much debated, * order: * * If the realm is specified on the command line we do * - afs/cell@COMMAND-LINE-REALM * - afs@COMMAND-LINE-REALM * * Otherwise, we do * - afs/cell@REALM-FROM-USERS-PRINCIPAL * - afs/cell@krb5_get_host_realm(db-server) * Then, if krb5_get_host_realm(db-server) is non-empty * - afs@ krb5_get_host_realm(db-server) * Otherwise * - afs/cell@ upper-case-domain-of-db-server * - afs@ upper-case-domain-of-db-server * * In all cases, the 'afs@' variant is only tried where the * cell and the realm match case-insensitively. */ static int rxkad_get_ticket(krb5_context context, char *realm, struct afsconf_cell *cell, krb5_creds **v5cred, char **realmUsed) { char *realm_of_cell = NULL; char *realm_of_user = NULL; char *realm_from_princ = NULL; int status; int retry; *realmUsed = NULL; if ((status = get_user_realm(context, &realm_of_user))) { fprintf(stderr, "%s: Couldn't determine realm of user:", progname); afs_com_err(progname, status, " while getting realm"); status = AKLOG_KERBEROS; goto out; } retry = 1; while(retry) { /* Cell on command line - use that one */ if (realm && realm[0]) { realm_of_cell = realm; status = AKLOG_TRYAGAIN; afs_dprintf("We were told to authenticate to realm %s.\n", realm); } else { /* Initially, try using afs/cell@USERREALM */ afs_dprintf("Trying to authenticate to user's realm %s.\n", realm_of_user); realm_of_cell = realm_of_user; status = get_credv5(context, AFSKEY, cell->name, realm_of_cell, v5cred); /* If that failed, try to determine the realm from the name of * one of the DB servers */ if (TRYAGAIN(status)) { realm_of_cell = afs_realm_of_cell(context, cell, FALSE); if (!realm_of_cell) { fprintf(stderr, "%s: Couldn't figure out realm for cell " "%s.\n", progname, cell->name); exit(AKLOG_MISC); } if (realm_of_cell[0]) afs_dprintf("We've deduced that we need to authenticate" " to realm %s.\n", realm_of_cell); else afs_dprintf("We've deduced that we need to authenticate " "using referrals.\n"); } } if (TRYAGAIN(status)) { /* If we've got the full-princ-first option, or we're in a * different realm from the cell - use the cell name as the * instance */ if (AFS_TRY_FULL_PRINC || strcasecmp(cell->name, realm_of_cell)!=0) { status = get_credv5(context, AFSKEY, cell->name, realm_of_cell, v5cred); /* If we failed & we've got an empty realm, then try * calling afs_realm_for_cell again. */ if (TRYAGAIN(status) && !realm_of_cell[0]) { /* This time, get the realm by taking the domain * component of the db server and make it upper case */ realm_of_cell = afs_realm_of_cell(context, cell, TRUE); if (!realm_of_cell) { fprintf(stderr, "%s: Couldn't figure out realm for cell %s.\n", progname, cell->name); exit(AKLOG_MISC); } afs_dprintf("We've deduced that we need to authenticate" " to realm %s.\n", realm_of_cell); } status = get_credv5(context, AFSKEY, cell->name, realm_of_cell, v5cred); } /* If the realm and cell name match, then try without an * instance, but only if realm is non-empty */ if (TRYAGAIN(status) && strcasecmp(cell->name, realm_of_cell) == 0) { status = get_credv5(context, AFSKEY, NULL, realm_of_cell, v5cred); if (!AFS_TRY_FULL_PRINC && TRYAGAIN(status)) { status = get_credv5(context, AFSKEY, cell->name, realm_of_cell, v5cred); } } } /* Try to find a service principal for this cell. * Some broken MIT libraries return KRB5KRB_AP_ERR_MSG_TYPE upon * the first attempt, so we try twice to be sure */ if (status == KRB5KRB_AP_ERR_MSG_TYPE && retry == 1) retry++; else retry = 0; } if (status != 0) { afs_dprintf("Kerberos error code returned by get_cred : %d\n", status); fprintf(stderr, "%s: Couldn't get %s AFS tickets:\n", progname, cell->name); afs_com_err(progname, status, "while getting AFS tickets"); #ifdef KRB5_CC_NOT_KTYPE if (status == KRB5_CC_NOT_KTYPE) { fprintf(stderr, "allow_weak_crypto may be required in the Kerberos configuration\n"); } #endif status = AKLOG_KERBEROS; goto out; } /* If we've got a valid ticket, and we still don't know the realm name * try to figure it out from the contents of the ticket */ if (strcmp(realm_of_cell, "") == 0) { status = get_realm_from_cred(context, *v5cred, &realm_from_princ); if (status) { fprintf(stderr, "%s: Couldn't decode ticket to determine realm for " "cell %s.\n", progname, cell->name); } else { if (realm_from_princ) realm_of_cell = realm_from_princ; } } /* If the realm of the user and cell differ, then we need to use the * realm when we later construct the user's principal */ if (realm_of_cell != NULL && strcmp(realm_of_user, realm_of_cell) != 0) *realmUsed = realm_of_user; out: if (realm_from_princ) free(realm_from_princ); if (realm_of_user && *realmUsed == NULL) free(realm_of_user); return status; } /*! * Build an rxkad token from a Kerberos ticket, using only local tools (that * is, without using a 524 conversion service) * * @param[in] context * An initialised Kerberos 5 context * @param[in] v5cred * A Kerberos credentials structure containing a suitable service ticket * @param[out] tokenPtr * An AFS token structure containing an rxkad token. This is a malloc'd * structure which should be freed by the caller. * @param[out[ userPtr * A string containing the principal of the user to whom the token was * issued. This is a malloc'd block which should be freed by the caller. * * @returns * 0 on success, an error value upon failure */ static int rxkad_build_native_token(krb5_context context, krb5_creds *v5cred, struct ktc_tokenUnion **tokenPtr, char **userPtr) { char username[BUFSIZ]; struct ktc_token token; int status; #ifdef HAVE_NO_KRB5_524 char *p; int len; #else char k4name[ANAME_SZ]; char k4inst[INST_SZ]; char k4realm[REALM_SZ]; #endif void *inkey = get_cred_keydata(v5cred); size_t inkey_sz = get_cred_keylen(v5cred); afs_dprintf("Using Kerberos V5 ticket natively\n"); *tokenPtr = NULL; *userPtr = NULL; #ifndef HAVE_NO_KRB5_524 status = krb5_524_conv_principal (context, v5cred->client, (char *) &k4name, (char *) &k4inst, (char *) &k4realm); if (status) { afs_com_err(progname, status, "while converting principal " "to Kerberos V4 format"); return AKLOG_KERBEROS; } strcpy (username, k4name); if (k4inst[0]) { strcat (username, "."); strcat (username, k4inst); } #else 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'; } #endif memset(&token, 0, sizeof(struct ktc_token)); token.kvno = RXKAD_TKT_TYPE_KERBEROS_V5; token.startTime = v5cred->times.starttime;; token.endTime = v5cred->times.endtime; if (tkt_DeriveDesKey(get_creds_enctype(v5cred), inkey, inkey_sz, &token.sessionKey) != 0) { return RXKADBADKEY; } token.ticketLen = v5cred->ticket.length; memcpy(token.ticket, v5cred->ticket.data, token.ticketLen); status = token_importRxkadViceId(tokenPtr, &token, 0); if (status) { return status; } *userPtr = strdup(username); return 0; } /*! * Convert a Keberos ticket to an rxkad token, using information obtained * from an external Kerberos 5->4 conversion service. If the code is built * with HAVE_NO_KRB5_524 then this is a stub function which will always * return success without a token. * * @param[in] context * An initialised Kerberos 5 context * @param[in] v5cred * A Kerberos credentials structure containing a suitable service ticket * @param[out] tokenPtr * An AFS token structure containing an rxkad token. This is a malloc'd * structure which should be freed by the caller. * @param[out[ userPtr * A string containing the principal of the user to whom the token was * issued. This is a malloc'd block which should be freed by the caller. * * @returns * 0 on success, an error value upon failure */ #ifdef HAVE_NO_KRB5_524 static int rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred, struct ktc_tokenUnion **tokenPtr, char **userPtr) { *tokenPtr = NULL; *userPtr = NULL; return 0; } #else static int rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred, struct ktc_tokenUnion **tokenPtr, char **userPtr) { CREDENTIALS cred; char username[BUFSIZ]; struct ktc_token token; int status; *tokenPtr = NULL; *userPtr = NULL; afs_dprintf("Using Kerberos 524 translator service\n"); status = krb5_524_convert_creds(context, v5cred, &cred); if (status) { afs_com_err(progname, status, "while converting tickets " "to Kerberos V4 format"); return AKLOG_KERBEROS; } strcpy (username, cred.pname); if (cred.pinst[0]) { strcat (username, "."); strcat (username, cred.pinst); } memset(&token, 0, sizeof(struct ktc_token)); token.kvno = cred.kvno; token.startTime = cred.issue_date; /* * It seems silly to go through a bunch of contortions to * extract the expiration time, when the v5 credentials already * has the exact time! Let's use that instead. * * Note that this isn't a security hole, as the expiration time * is also contained in the encrypted token */ token.endTime = v5cred->times.endtime; memcpy(&token.sessionKey, cred.session, 8); token.ticketLen = cred.ticket_st.length; memcpy(token.ticket, cred.ticket_st.dat, token.ticketLen); status = token_importRxkadViceId(tokenPtr, &token, 0); if (status) { return status; } *userPtr = strdup(username); return 0; } #endif /*! * This function gets an rxkad token for a given cell. * * @param[in] context * An initialized Kerberos v5 context * @param[in] cell * The cell information for the cell which we're obtaining a token for * @param[in] realm * The realm to look in for the service principal. If NULL, then the * realm is determined from the cell name or the user's credentials * (see the documentation for rxkad_get_ticket) * @param[out] token * The rxkad token produced. This is a malloc'd structure which should * be freed by the caller. * @parma[out] authuser * A string containing the principal of the user to whom the token was * issued. This is a malloc'd block which should be freed by the caller. * @param[out] foreign * Whether the user is considered as 'foreign' to the realm of the cell. * * @returns * 0 on success, an error value upon failuer */ static int rxkad_get_token(krb5_context context, struct afsconf_cell *cell, char *realm, struct ktc_tokenUnion **token, char **authuser, int *foreign) { krb5_creds *v5cred; char *realmUsed = NULL; char *username = NULL; int status; *token = NULL; *authuser = NULL; *foreign = 0; status = rxkad_get_ticket(context, realm, cell, &v5cred, &realmUsed); if (status) return status; if (do524) status = rxkad_get_converted_token(context, v5cred, token, &username); else status = rxkad_build_native_token(context, v5cred, token, &username); if (status) goto out; /* We now have the username, plus the realm name, so stitch them together * to give us the name that the ptserver will know the user by */ if (realmUsed == NULL) { *authuser = username; username = NULL; *foreign = 0; } else { asprintf(authuser, "%s@%s", username, realmUsed); *foreign = 1; } out: if (realmUsed) free(realmUsed); if (username) free(username); 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, const char *config, char *cell, char *realm, char **linkedcell) { int status = AKLOG_SUCCESS; int isForeign = 0; char *username = NULL; /* To hold client username structure */ afs_int32 viceId; /* AFS uid of user */ char *local_cell = NULL; struct ktc_tokenUnion *rxkadToken = NULL; struct ktc_setTokenData *token; struct ktc_setTokenData *btoken = NULL; struct afsconf_cell cellconf; /* NULL or empty cell returns information on local cell */ if ((status = get_cellconfig(config, cell, &cellconf, &local_cell))) return(status); if (linkedcell != NULL) { if (cellconf.linkedCell != NULL) { *linkedcell = strdup(cellconf.linkedCell); if (*linkedcell == NULL) { status = ENOMEM; goto out; } } else { *linkedcell = NULL; } } if (ll_string(&authedcells, ll_s_check, cellconf.name)) { afs_dprintf("Already authenticated to %s (or tried to)\n", cellconf.name); status = AKLOG_SUCCESS; goto out; } /* * Record that we have attempted to log to this cell. We do this * before we try rather than after so that we will not try * and fail repeatedly for one cell. */ ll_string(&authedcells, ll_s_add, cellconf.name); /* * Record this cell in the list of zephyr subscriptions. We may * want zephyr subscriptions even if authentication fails. * If this is done after we attempt to get tokens, aklog -zsubs * can return something different depending on whether or not we * are in -noauth mode. */ if (ll_string(&zsublist, ll_s_add, cellconf.name) == LL_FAILURE) { fprintf(stderr, "%s: failure adding cell %s to zephyr subscriptions list.\n", progname, cellconf.name); exit(AKLOG_MISC); } if (ll_string(&zsublist, ll_s_add, local_cell) == LL_FAILURE) { fprintf(stderr, "%s: failure adding cell %s to zephyr subscriptions list.\n", progname, local_cell); exit(AKLOG_MISC); } if (!noauth) { afs_dprintf("Authenticating to cell %s (server %s).\n", cellconf.name, cellconf.hostName[0]); token = token_buildTokenJar(cellconf.name); if (token == NULL) { status = ENOMEM; goto out; } status = rxkad_get_token(context, &cellconf, realm, &rxkadToken, &username, &isForeign); if (status) goto out; /* We need to keep the token structure around so that we can stick * the viceId into it (once we know it) */ status = token_addToken(token, rxkadToken); if (status) { afs_dprintf("Add Token failed with %d", status); goto out; } if (!force && ktc_GetTokenEx(cellconf.name, &btoken) == 0 && token_SetsEquivalent(token, btoken)) { token_FreeSet(&btoken); afs_dprintf("Identical tokens already exist; skipping.\n"); status = AKLOG_SUCCESS; goto out; } if (btoken) token_FreeSet(&btoken); #ifdef FORCE_NOPRDB noprdb = 1; #endif if (noprdb) { afs_dprintf("Not resolving name %s to id (-noprdb set)\n", username); } else { afs_dprintf("About to resolve name %s to id in cell %s.\n", username, cellconf.name); if (!pr_Initialize (0, AFSDIR_CLIENT_ETC_DIRPATH, cellconf.name)) status = pr_SNameToId (username, &viceId); if (status) afs_dprintf("Error %d\n", status); else afs_dprintf("Id %d\n", (int) viceId); /* * This code is taken from cklog -- it lets people * automatically register with the ptserver in foreign cells */ #ifdef ALLOW_REGISTER if ((status == 0) && (viceId == ANONYMOUSID) && isForeign) { afs_dprintf("doing first-time registration of %s at %s\n", username, cellconf.name); viceId = 0; status = ktc_SetTokenEx(token); if (status) { afs_com_err(progname, status, "while obtaining tokens for cell %s", cellconf.name); status = AKLOG_TOKEN; } /* * In case you're wondering, we don't need to change the * filename here because we're still connecting to the * same cell -- we're just using a different authenticat ion * level */ if ((status = pr_Initialize(1L, AFSDIR_CLIENT_ETC_DIRPATH, cellconf.name))) { printf("Error %d\n", status); } if ((status = pr_CreateUser(username, &viceId))) { fprintf(stderr, "%s: %s so unable to create remote PTS " "user %s in cell %s (status: %d).\n", progname, afs_error_message(status), username, cellconf.name, status); viceId = ANONYMOUSID; } else { printf("created cross-cell entry for %s (Id %d) at %s\n", username, viceId, cellconf.name); } } #endif /* ALLOW_REGISTER */ if ((status == 0) && (viceId != ANONYMOUSID)) { status = token_setRxkadViceId(rxkadToken, viceId); if (status) { fprintf(stderr, "Error %d setting rxkad ViceId\n", status); status = AKLOG_SUCCESS; } else { token_replaceToken(token, rxkadToken); } } } afs_dprintf("Setting tokens. %s @ %s \n", username, cellconf.name); #ifndef AFS_AIX51_ENV /* 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. * On AIX 5, it causes the parent program to die, so we won't. */ write(2,"",0); /* dummy write */ #endif token_setPag(token, afssetpag); status = ktc_SetTokenEx(token); if (status) { afs_com_err(progname, status, "while setting tokens for cell %s", cellconf.name); status = AKLOG_TOKEN; } } else afs_dprintf("Noauth mode; not authenticating.\n"); out: if (rxkadToken) { token_freeToken(&rxkadToken); } if (local_cell) free(local_cell); if (username) free(username); return(status); } static int get_afs_mountpoint(char *file, char *mountpoint, int size) { #ifdef AFS_SUN_ENV char V ='V'; /* AFS has problem on Sun with pioctl */ #endif char our_file[MAXPATHLEN + 1]; char *parent_dir; char *last_component; struct ViceIoctl vio; char cellname[BUFSIZ]; strlcpy(our_file, file, sizeof(our_file)); if ((last_component = strrchr(our_file, DIR))) { *last_component++ = 0; parent_dir = our_file; } else { last_component = our_file; parent_dir = "."; } memset(cellname, 0, sizeof(cellname)); vio.in = last_component; vio.in_size = strlen(last_component)+1; vio.out_size = size; vio.out = mountpoint; if (!pioctl(parent_dir, VIOC_AFS_STAT_MT_PT, &vio, 0)) { if (strchr(mountpoint, VOLMARKER) == NULL) { vio.in = file; vio.in_size = strlen(file) + 1; vio.out_size = sizeof(cellname); vio.out = cellname; if (!pioctl(file, VIOC_FILE_CELL_NAME, &vio, 1)) { strlcat(cellname, VOLMARKERSTRING, sizeof(cellname)); strlcat(cellname, mountpoint + 1, sizeof(cellname)); memset(mountpoint + 1, 0, size - 1); strcpy(mountpoint + 1, cellname); } } return(TRUE); } else return(FALSE); } /* * This routine each time it is called returns the next directory * down a pathname. It resolves all symbolic links. The first time * it is called, it should be called with the name of the path * to be descended. After that, it should be called with the arguemnt * NULL. */ static char * next_path(char *origpath) { static char path[MAXPATHLEN + 1]; static char pathtocheck[MAXPATHLEN + 1]; int link = FALSE; /* Is this a symbolic link? */ char linkbuf[MAXPATHLEN + 1]; char tmpbuf[MAXPATHLEN + 1]; static char *last_comp; /* last component of directory name */ static char *elast_comp; /* End of last component */ char *t; int len; static int symlinkcount = 0; /* We can't exceed MAXSYMLINKS */ /* If we are given something for origpath, we are initializing only. */ if (origpath) { memset(path, 0, sizeof(path)); memset(pathtocheck, 0, sizeof(pathtocheck)); strlcpy(path, origpath, sizeof(path)); last_comp = path; symlinkcount = 0; return(NULL); } /* We were not given origpath; find then next path to check */ /* If we've gotten all the way through already, return NULL */ if (last_comp == NULL) return(NULL); do { while (*last_comp == DIR) strncat(pathtocheck, last_comp++, 1); len = (elast_comp = strchr(last_comp, DIR)) ? elast_comp - last_comp : strlen(last_comp); strncat(pathtocheck, last_comp, len); memset(linkbuf, 0, sizeof(linkbuf)); link = readlink(pathtocheck, linkbuf, sizeof(linkbuf)-1); if (link > 0) { linkbuf[link] = '\0'; /* NUL terminate string */ if (++symlinkcount > MAXSYMLINKS) { fprintf(stderr, "%s: %s\n", progname, strerror(ELOOP)); exit(AKLOG_BADPATH); } memset(tmpbuf, 0, sizeof(tmpbuf)); if (elast_comp) strlcpy(tmpbuf, elast_comp, sizeof(tmpbuf)); if (linkbuf[0] == DIR) { /* * If this is a symbolic link to an absolute path, * replace what we have by the absolute path. */ memset(path, 0, strlen(path)); memcpy(path, linkbuf, sizeof(linkbuf)); strcat(path, tmpbuf); last_comp = path; elast_comp = NULL; memset(pathtocheck, 0, sizeof(pathtocheck)); } else { /* * If this is a symbolic link to a relative path, * replace only the last component with the link name. */ strncpy(last_comp, linkbuf, strlen(linkbuf) + 1); strcat(path, tmpbuf); elast_comp = NULL; if ((t = strrchr(pathtocheck, DIR))) { t++; memset(t, 0, strlen(t)); } else memset(pathtocheck, 0, sizeof(pathtocheck)); } } else last_comp = elast_comp; } while(link); return(pathtocheck); } static void add_hosts(char *file) { #ifdef AFS_SUN_ENV char V = 'V'; /* AFS has problem on SunOS */ #endif struct ViceIoctl vio; char outbuf[BUFSIZ]; long *phosts; int i; struct hostent *hp; struct in_addr in; memset(outbuf, 0, sizeof(outbuf)); vio.out_size = sizeof(outbuf); vio.in_size = 0; vio.out = outbuf; afs_dprintf("Getting list of hosts for %s\n", file); /* Don't worry about errors. */ if (!pioctl(file, VIOCWHEREIS, &vio, 1)) { phosts = (long *) outbuf; /* * Lists hosts that we care about. If ALLHOSTS is defined, * then all hosts that you ever may possible go through are * included in this list. If not, then only hosts that are * the only ones appear. That is, if a volume you must use * is replaced on only one server, that server is included. * If it is replicated on many servers, then none are included. * This is not perfect, but the result is that people don't * get subscribed to a lot of instances of FILSRV that they * probably won't need which reduces the instances of * people getting messages that don't apply to them. */ #ifndef ALLHOSTS if (phosts[1] != '\0') return; #endif for (i = 0; phosts[i]; i++) { if (hosts) { in.s_addr = phosts[i]; afs_dprintf("Got host %s\n", inet_ntoa(in)); ll_string(&hostlist, ll_s_add, (char *)inet_ntoa(in)); } if (zsubs && (hp=gethostbyaddr((char *) &phosts[i],sizeof(long),AF_INET))) { afs_dprintf("Got host %s\n", hp->h_name); ll_string(&zsublist, ll_s_add, hp->h_name); } } } } /* * This routine descends through a path to a directory, logging to * every cell it encounters along the way. */ static int auth_to_path(krb5_context context, const char *config, char *path) { int status = AKLOG_SUCCESS; int auth_status = AKLOG_SUCCESS; char *nextpath; char pathtocheck[MAXPATHLEN + 1]; char mountpoint[MAXPATHLEN + 1]; char *cell; char *endofcell; u_char isdirectory; /* Initialize */ if (path[0] == DIR) strlcpy(pathtocheck, path, sizeof(pathtocheck)); else { if (getcwd(pathtocheck, sizeof(pathtocheck)) == NULL) { fprintf(stderr, "Unable to find current working directory:\n"); fprintf(stderr, "%s\n", pathtocheck); fprintf(stderr, "Try an absolute pathname.\n"); exit(AKLOG_BADPATH); } else { strlcat(pathtocheck, DIRSTRING, sizeof(pathtocheck)); strlcat(pathtocheck, path, sizeof(pathtocheck)); } } next_path(pathtocheck); /* Go on to the next level down the path */ while ((nextpath = next_path(NULL))) { strlcpy(pathtocheck, nextpath, sizeof(pathtocheck)); afs_dprintf("Checking directory %s\n", pathtocheck); /* * If this is an afs mountpoint, determine what cell from * the mountpoint name which is of the form * #cellname:volumename or %cellname:volumename. */ if (get_afs_mountpoint(pathtocheck, mountpoint, sizeof(mountpoint))) { /* skip over the '#' or '%' */ cell = mountpoint + 1; /* Add this (cell:volumename) to the list of zsubs */ if (zsubs) ll_string(&zsublist, ll_s_add, cell); if (zsubs || hosts) add_hosts(pathtocheck); if ((endofcell = strchr(mountpoint, VOLMARKER))) { *endofcell = '\0'; auth_status = auth_to_cell(context, config, cell, NULL, NULL); if (auth_status) { if (status == AKLOG_SUCCESS) status = auth_status; else if (status != auth_status) status = AKLOG_SOMETHINGSWRONG; } } } else { if (isdir(pathtocheck, &isdirectory) < 0) { /* * If we've logged and still can't stat, there's * a problem... */ fprintf(stderr, "%s: stat(%s): %s\n", progname, pathtocheck, strerror(errno)); return(AKLOG_BADPATH); } else if (! isdirectory) { /* Allow only directories */ fprintf(stderr, "%s: %s: %s\n", progname, pathtocheck, strerror(ENOTDIR)); return(AKLOG_BADPATH); } } } return(status); } /* Print usage message and exit */ static void usage(void) { fprintf(stderr, "\nUsage: %s %s%s%s\n", progname, "[-d] [[-cell | -c] cell [-k krb_realm]] ", "[[-p | -path] pathname]\n", " [-zsubs] [-hosts] [-noauth] [-noprdb] [-force] [-setpag] \n" " [-linked]" #ifndef HAVE_NO_KRB5_524 " [-524]" #endif "\n"); fprintf(stderr, " -d gives debugging information.\n"); fprintf(stderr, " krb_realm is the kerberos realm of a cell.\n"); fprintf(stderr, " pathname is the name of a directory to which "); fprintf(stderr, "you wish to authenticate.\n"); fprintf(stderr, " -zsubs gives zephyr subscription information.\n"); fprintf(stderr, " -hosts gives host address information.\n"); fprintf(stderr, " -noauth does not attempt to get tokens.\n"); fprintf(stderr, " -noprdb means don't try to determine AFS ID.\n"); fprintf(stderr, " -force means replace identical tickets. \n"); fprintf(stderr, " -linked means if AFS node is linked, try both. \n"); fprintf(stderr, " -setpag set the AFS process authentication group.\n"); #ifndef HAVE_NO_KRB5_524 fprintf(stderr, " -524 means use the 524 converter instead of V5 directly\n"); #endif fprintf(stderr, " No commandline arguments means "); fprintf(stderr, "authenticate to the local cell.\n"); fprintf(stderr, "\n"); exit(AKLOG_USAGE); } int main(int argc, char *argv[]) { krb5_context context; int status = AKLOG_SUCCESS; int i; int somethingswrong = FALSE; cellinfo_t cellinfo; extern char *progname; /* Name of this program */ int cmode = FALSE; /* Cellname mode */ int pmode = FALSE; /* Path name mode */ char realm[REALM_SZ]; /* Kerberos realm of afs server */ char cell[BUFSIZ]; /* Cell to which we are authenticating */ char path[MAXPATHLEN + 1]; /* Path length for path mode */ linked_list cells; /* List of cells to log to */ linked_list paths; /* List of paths to log to */ ll_node *cur_node; char *linkedcell; const char *config = AFSDIR_CLIENT_ETC_DIRPATH; memset(&cellinfo, 0, sizeof(cellinfo)); memset(realm, 0, sizeof(realm)); memset(cell, 0, sizeof(cell)); memset(path, 0, sizeof(path)); ll_init(&cells); ll_init(&paths); ll_init(&zsublist); ll_init(&hostlist); /* Store the program name here for error messages */ if ((progname = strrchr(argv[0], DIR))) progname++; else progname = argv[0]; #if defined(KRB5_PROG_ETYPE_NOSUPP) && !(defined(HAVE_KRB5_ENCTYPE_ENABLE) || defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)) { char *filepath = NULL, *newpath = NULL; #ifndef AFS_DARWIN_ENV char *defaultpath = "/etc/krb5.conf:/etc/krb5/krb5.conf"; #else char *defaultpath = "~/Library/Preferences/edu.mit.Kerberos:/Library/Preferences/edu.mit.Kerberos"; #endif filepath = getenv("KRB5_CONFIG"); /* only fiddle with KRB5_CONFIG if krb5-weak.conf actually exists */ asprintf(&newpath, "%s/krb5-weak.conf", AFSDIR_CLIENT_ETC_DIRPATH); if (access(newpath, R_OK) == 0) { free(newpath); newpath = NULL; asprintf(&newpath, "%s:%s/krb5-weak.conf", filepath ? filepath : defaultpath, AFSDIR_CLIENT_ETC_DIRPATH); setenv("KRB5_CONFIG", newpath, 1); } #endif krb5_init_context(&context); #if defined(KRB5_PROG_ETYPE_NOSUPP) && !(defined(HAVE_KRB5_ENCTYPE_ENABLE) || defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)) free(newpath); if (filepath) setenv("KRB5_CONFIG", filepath, 1); else unsetenv("KRB5_CONFIG"); } #endif initialize_KTC_error_table (); initialize_U_error_table(); initialize_RXK_error_table(); initialize_ACFG_error_table(); initialize_PT_error_table(); afs_set_com_err_hook(redirect_errors); /* * Enable DES enctypes, which are currently still required for AFS. * krb5_allow_weak_crypto is MIT Kerberos 1.8. krb5_enctype_enable is * Heimdal. */ #if defined(HAVE_KRB5_ENCTYPE_ENABLE) i = krb5_enctype_valid(context, ETYPE_DES_CBC_CRC); if (i) krb5_enctype_enable(context, ETYPE_DES_CBC_CRC); #elif defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO) krb5_allow_weak_crypto(context, 1); #endif /* Initialize list of cells to which we have authenticated */ ll_init(&authedcells); /* Parse commandline arguments and make list of what to do. */ for (i = 1; i < argc; i++) { if (strcmp(argv[i], "-d") == 0) dflag++; else if (strcmp(argv[i], "-noauth") == 0) noauth++; else if (strcmp(argv[i], "-zsubs") == 0) zsubs++; else if (strcmp(argv[i], "-hosts") == 0) hosts++; else if (strcmp(argv[i], "-noprdb") == 0) noprdb++; else if (strcmp(argv[i], "-linked") == 0) linked++; else if (strcmp(argv[i], "-force") == 0) force++; #ifndef HAVE_NO_KRB5_524 else if (strcmp(argv[i], "-524") == 0) do524++; #endif else if (strcmp(argv[i], "-setpag") == 0) afssetpag++; else if (((strcmp(argv[i], "-cell") == 0) || (strcmp(argv[i], "-c") == 0)) && !pmode) if (++i < argc) { cmode++; strlcpy(cell, argv[i], sizeof(cell)); } else usage(); else if ((strcmp(argv[i], "-keytab") == 0)) if (++i < argc) { keytab = argv[i]; } else usage(); else if ((strcmp(argv[i], "-principal") == 0)) if (++i < argc) { client = argv[i]; } else usage(); else if (((strcmp(argv[i], "-path") == 0) || (strcmp(argv[i], "-p") == 0)) && !cmode) if (++i < argc) { pmode++; strlcpy(path, argv[i], sizeof(path)); } else usage(); else if (strcmp(argv[i], "-config") == 0) if (++i < argc) { config = argv[i]; } else usage(); else if (argv[i][0] == '-') usage(); else if (!pmode && !cmode) { if (strchr(argv[i], DIR) || (strcmp(argv[i], ".") == 0) || (strcmp(argv[i], "..") == 0)) { pmode++; strlcpy(path, argv[i], sizeof(path)); } else { cmode++; strlcpy(cell, argv[i], sizeof(path)); } } else usage(); if (cmode) { if (((i + 1) < argc) && (strcmp(argv[i + 1], "-k") == 0)) { i+=2; if (i < argc) strlcpy(realm, argv[i], sizeof(realm)); else usage(); } /* Add this cell to list of cells */ strcpy(cellinfo.cell, cell); strcpy(cellinfo.realm, realm); if ((cur_node = ll_add_node(&cells, ll_tail))) { char *new_cellinfo; if ((new_cellinfo = copy_cellinfo(&cellinfo))) ll_add_data(cur_node, new_cellinfo); else { fprintf(stderr, "%s: failure copying cellinfo.\n", progname); exit(AKLOG_MISC); } } else { fprintf(stderr, "%s: failure adding cell to cells list.\n", progname); exit(AKLOG_MISC); } memset(&cellinfo, 0, sizeof(cellinfo)); cmode = FALSE; memset(cell, 0, sizeof(cell)); memset(realm, 0, sizeof(realm)); } else if (pmode) { /* Add this path to list of paths */ if ((cur_node = ll_add_node(&paths, ll_tail))) { char *new_path; if ((new_path = strdup(path))) ll_add_data(cur_node, new_path); else { fprintf(stderr, "%s: failure copying path name.\n", progname); exit(AKLOG_MISC); } } else { fprintf(stderr, "%s: failure adding path to paths list.\n", progname); exit(AKLOG_MISC); } pmode = FALSE; memset(path, 0, sizeof(path)); } } /* If nothing was given, log to the local cell. */ if ((cells.nelements + paths.nelements) == 0) { struct passwd *pwd; status = auth_to_cell(context, config, NULL, NULL, &linkedcell); /* If this cell is linked to a DCE cell, and user requested -linked, * get tokens for both. This is very useful when the AFS cell is * linked to a DFS cell and this system does not also have DFS. */ if (!status && linked && linkedcell != NULL) { afs_dprintf("Linked cell: %s\n", linkedcell); status = auth_to_cell(context, config, linkedcell, NULL, NULL); } if (linkedcell) { free(linkedcell); linkedcell = NULL; } /* * 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]; strlcpy(xlog_path, pwd->pw_dir, sizeof(xlog_path)); strlcat(xlog_path, "/.xlog", sizeof(xlog_path)); if ((stat(xlog_path, &sbuf) == 0) && ((f = fopen(xlog_path, "r")) != NULL)) { afs_dprintf("Reading %s for cells to authenticate to.\n", xlog_path); while (fgets(fcell, 100, f) != NULL) { int auth_status; fcell[strlen(fcell) - 1] = '\0'; afs_dprintf("Found cell %s in %s.\n", fcell, xlog_path); auth_status = auth_to_cell(context, config, fcell, NULL, NULL); if (status == AKLOG_SUCCESS) status = auth_status; else status = AKLOG_SOMETHINGSWRONG; } } } } else { /* Log to all cells in the cells list first */ for (cur_node = cells.first; cur_node; cur_node = cur_node->next) { memcpy((char *)&cellinfo, cur_node->data, sizeof(cellinfo)); status = auth_to_cell(context, config, cellinfo.cell, cellinfo.realm, &linkedcell); if (status) { somethingswrong++; } else { if (linked && linkedcell != NULL) { afs_dprintf("Linked cell: %s\n", linkedcell); status = auth_to_cell(context, config, linkedcell, cellinfo.realm, NULL); if (status) somethingswrong++; } if (linkedcell != NULL) { free(linkedcell); linkedcell = NULL; } } } /* Then, log to all paths in the paths list */ for (cur_node = paths.first; cur_node; cur_node = cur_node->next) { status = auth_to_path(context, config, cur_node->data); if (status) somethingswrong++; } /* * If only one thing was logged to, we'll return the status * of the single call. Otherwise, we'll return a generic * something failed status. */ if (somethingswrong && ((cells.nelements + paths.nelements) > 1)) status = AKLOG_SOMETHINGSWRONG; } /* If we are keeping track of zephyr subscriptions, print them. */ if (zsubs) for (cur_node = zsublist.first; cur_node; cur_node = cur_node->next) { printf("zsub: %s\n", cur_node->data); } /* If we are keeping track of host information, print it. */ if (hosts) for (cur_node = hostlist.first; cur_node; cur_node = cur_node->next) { printf("host: %s\n", cur_node->data); } exit(status); } static int isdir(char *path, unsigned char *val) { struct stat statbuf; if (lstat(path, &statbuf) < 0) return (-1); else { if ((statbuf.st_mode & S_IFMT) == S_IFDIR) *val = TRUE; else *val = FALSE; return (0); } } static krb5_error_code get_credv5_akimpersonate(krb5_context context, char* keytab, krb5_principal service_principal, krb5_principal client_principal, time_t starttime, time_t endtime, int *allowed_enctypes, int *paddress, krb5_creds** out_creds /* out */ ) { #if defined(USING_HEIMDAL) || (defined(HAVE_ENCODE_KRB5_ENC_TKT) && defined(HAVE_ENCODE_KRB5_TICKET) && defined(HAVE_KRB5_C_ENCRYPT)) krb5_error_code code; krb5_keytab kt = 0; krb5_kt_cursor cursor[1]; krb5_keytab_entry entry[1]; krb5_ccache cc = 0; krb5_creds *creds = 0; krb5_enctype enctype; krb5_kvno kvno; krb5_keyblock session_key[1]; #if USING_HEIMDAL Ticket ticket_reply[1]; EncTicketPart enc_tkt_reply[1]; krb5_address address[30]; krb5_addresses faddr[1]; unsigned int temp_vno[1]; time_t temp_time[2]; #else krb5_ticket ticket_reply[1]; krb5_enc_tkt_part enc_tkt_reply[1]; krb5_address address[30], *faddr[30]; krb5_data * temp; #endif int i; static int any_enctype[] = {0}; *out_creds = 0; if (!(creds = malloc(sizeof *creds))) { code = ENOMEM; goto cleanup; } if (!allowed_enctypes) allowed_enctypes = any_enctype; cc = 0; enctype = 0; /* AKIMPERSONATE_IGNORE_ENCTYPE */ kvno = 0; /* AKIMPERSONATE_IGNORE_VNO */ memset((char*)creds, 0, sizeof *creds); memset((char*)entry, 0, sizeof *entry); memset((char*)session_key, 0, sizeof *session_key); memset((char*)ticket_reply, 0, sizeof *ticket_reply); memset((char*)enc_tkt_reply, 0, sizeof *enc_tkt_reply); code = krb5_kt_resolve(context, keytab, &kt); if (code) { if (keytab) afs_com_err(progname, code, "while resolving keytab %s", keytab); else afs_com_err(progname, code, "while resolving default keytab"); goto cleanup; } if (service_principal) { for (i = 0; (enctype = allowed_enctypes[i]) || !i; ++i) { code = krb5_kt_get_entry(context, kt, service_principal, kvno, enctype, entry); if (!code) { if (allowed_enctypes[i]) deref_keyblock_enctype(session_key) = allowed_enctypes[i]; break; } } if (code) { afs_com_err(progname, code,"while scanning keytab entries"); goto cleanup; } } else { krb5_keytab_entry new[1]; int best = -1; memset(new, 0, sizeof *new); if ((code == krb5_kt_start_seq_get(context, kt, cursor))) { afs_com_err(progname, code, "while starting keytab scan"); goto cleanup; } while (!(code = krb5_kt_next_entry(context, kt, new, cursor))) { for (i = 0; allowed_enctypes[i] && allowed_enctypes[i] != deref_entry_enctype(new); ++i) ; if ((!i || allowed_enctypes[i]) && (best < 0 || best > i)) { krb5_free_keytab_entry_contents(context, entry); *entry = *new; memset(new, 0, sizeof *new); } else krb5_free_keytab_entry_contents(context, new); } if ((i = krb5_kt_end_seq_get(context, kt, cursor))) { afs_com_err(progname, i, "while ending keytab scan"); code = i; goto cleanup; } if (best < 0) { afs_com_err(progname, code, "while scanning keytab"); goto cleanup; } deref_keyblock_enctype(session_key) = deref_entry_enctype(entry); } /* Make Ticket */ #if USING_HEIMDAL if ((code = krb5_generate_random_keyblock(context, deref_keyblock_enctype(session_key), session_key))) { afs_com_err(progname, code, "while making session key"); goto cleanup; } enc_tkt_reply->flags.initial = 1; enc_tkt_reply->transited.tr_type = DOMAIN_X500_COMPRESS; enc_tkt_reply->cname = client_principal->name; enc_tkt_reply->crealm = client_principal->realm; enc_tkt_reply->key = *session_key; { static krb5_data empty_string; enc_tkt_reply->transited.contents = empty_string; } enc_tkt_reply->authtime = starttime; enc_tkt_reply->starttime = temp_time; *enc_tkt_reply->starttime = starttime; #if 0 enc_tkt_reply->renew_till = temp_time + 1; *enc_tkt_reply->renew_till = endtime; #endif enc_tkt_reply->endtime = endtime; #else if ((code = krb5_c_make_random_key(context, deref_keyblock_enctype(session_key), session_key))) { afs_com_err(progname, code, "while making session key"); goto cleanup; } enc_tkt_reply->magic = KV5M_ENC_TKT_PART; #define DATACAST (unsigned char *) enc_tkt_reply->flags |= TKT_FLG_INITIAL; enc_tkt_reply->transited.tr_type = KRB5_DOMAIN_X500_COMPRESS; enc_tkt_reply->session = session_key; enc_tkt_reply->client = client_principal; { static krb5_data empty_string; enc_tkt_reply->transited.tr_contents = empty_string; } enc_tkt_reply->times.authtime = starttime; enc_tkt_reply->times.starttime = starttime; /* krb524init needs this */ enc_tkt_reply->times.endtime = endtime; #endif /* USING_HEIMDAL */ /* NB: We will discard address for now--ignoring caddr field in any case. MIT branch does what it always did. */ if (paddress && *paddress) { deref_enc_tkt_addrs(enc_tkt_reply) = faddr; #if USING_HEIMDAL faddr->len = 0; faddr->val = address; #endif for (i = 0; paddress[i]; ++i) { #if USING_HEIMDAL address[i].addr_type = KRB5_ADDRESS_INET; address[i].address.data = (void*)(paddress+i); address[i].address.length = sizeof(paddress[i]); #else #if !USING_SSL address[i].magic = KV5M_ADDRESS; address[i].addrtype = ADDRTYPE_INET; #else address[i].addrtype = AF_INET; #endif address[i].contents = (void*)(paddress+i); address[i].length = sizeof(int); faddr[i] = address+i; #endif } #if USING_HEIMDAL faddr->len = i; #else faddr[i] = 0; #endif } #if USING_HEIMDAL ticket_reply->sname = service_principal->name; ticket_reply->realm = service_principal->realm; { /* crypto block */ krb5_crypto crypto = 0; unsigned char *buf = 0; size_t buf_size, buf_len; char *what; ASN1_MALLOC_ENCODE(EncTicketPart, buf, buf_size, enc_tkt_reply, &buf_len, code); if(code) { afs_com_err(progname, code, "while encoding ticket"); goto cleanup; } if(buf_len != buf_size) { afs_com_err(progname, code, "%u != %u while encoding ticket (internal ASN.1 encoder error", (unsigned int)buf_len, (unsigned int)buf_size); goto cleanup; } what = "krb5_crypto_init"; code = krb5_crypto_init(context, &deref_entry_keyblock(entry), deref_entry_enctype(entry), &crypto); if(!code) { what = "krb5_encrypt"; code = krb5_encrypt_EncryptedData(context, crypto, KRB5_KU_TICKET, buf, buf_len, entry->vno, &(ticket_reply->enc_part)); } if (buf) free(buf); if (crypto) krb5_crypto_destroy(context, crypto); if(code) { afs_com_err(progname, code, "while %s", what); goto cleanup; } } /* crypto block */ ticket_reply->enc_part.etype = deref_entry_enctype(entry); ticket_reply->enc_part.kvno = (void *)temp_vno; *ticket_reply->enc_part.kvno = entry->vno; ticket_reply->tkt_vno = 5; #else ticket_reply->server = service_principal; ticket_reply->enc_part2 = enc_tkt_reply; if ((code = krb5_encrypt_tkt_part(context, &deref_entry_keyblock(entry), ticket_reply))) { afs_com_err(progname, code, "while making ticket"); goto cleanup; } ticket_reply->enc_part.kvno = entry->vno; #endif /* Construct Creds */ if ((code = krb5_copy_principal(context, service_principal, &creds->server))) { afs_com_err(progname, code, "while copying service principal"); goto cleanup; } if ((code = krb5_copy_principal(context, client_principal, &creds->client))) { afs_com_err(progname, code, "while copying client principal"); goto cleanup; } if ((code = krb5_copy_keyblock_contents(context, session_key, &deref_session_key(creds)))) { afs_com_err(progname, code, "while copying session key"); goto cleanup; } #if USING_HEIMDAL creds->times.authtime = enc_tkt_reply->authtime; creds->times.starttime = *(enc_tkt_reply->starttime); creds->times.endtime = enc_tkt_reply->endtime; creds->times.renew_till = 0; /* *(enc_tkt_reply->renew_till) */ creds->flags.b = enc_tkt_reply->flags; #else creds->times = enc_tkt_reply->times; creds->ticket_flags = enc_tkt_reply->flags; #endif if (!deref_enc_tkt_addrs(enc_tkt_reply)) ; else if ((code = krb5_copy_addresses(context, deref_enc_tkt_addrs(enc_tkt_reply), &creds->addresses))) { afs_com_err(progname, code, "while copying addresses"); goto cleanup; } #if USING_HEIMDAL { size_t creds_tkt_len; ASN1_MALLOC_ENCODE(Ticket, creds->ticket.data, creds->ticket.length, ticket_reply, &creds_tkt_len, code); if(code) { afs_com_err(progname, code, "while encoding ticket"); goto cleanup; } } #else if ((code = encode_krb5_ticket(ticket_reply, &temp))) { afs_com_err(progname, code, "while encoding ticket"); goto cleanup; } creds->ticket = *temp; free(temp); #endif /* return creds */ *out_creds = creds; creds = 0; cleanup: if (deref_enc_data(&ticket_reply->enc_part)) free(deref_enc_data(&ticket_reply->enc_part)); krb5_free_keytab_entry_contents(context, entry); if (client_principal) krb5_free_principal(context, client_principal); if (service_principal) krb5_free_principal(context, service_principal); if (cc) krb5_cc_close(context, cc); if (kt) krb5_kt_close(context, kt); if (creds) krb5_free_creds(context, creds); krb5_free_keyblock_contents(context, session_key); return code; #else return -1; #endif } 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; afs_dprintf("Getting tickets: %s%s%s@%s\n", name, (inst && inst[0]) ? "/" : "", inst ? inst : "", realm); memset(&increds, 0, sizeof(increds)); /* ANL - 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 : NULL, NULL))) { return r; } if (!_krb425_ccache) { r = krb5_cc_default(context, &_krb425_ccache); if (r) return r; } if (!client_principal) { if (client) { r = krb5_parse_name(context, client, &client_principal); } else { r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal); } if (r) return r; } increds.client = client_principal; increds.times.endtime = 0; if (do524) /* Ask for DES since that is what V4 understands */ get_creds_enctype((&increds)) = ENCTYPE_DES_CBC_CRC; if (keytab) { int allowed_enctypes[] = { ENCTYPE_DES_CBC_CRC, 0 }; r = get_credv5_akimpersonate(context, keytab, increds.server, increds.client, 300, ((~0U)>>1), allowed_enctypes, 0 /* paddress */, creds /* out */); } else { 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; krb5_error_code r = 0; *realm = NULL; if (!_krb425_ccache) { r = krb5_cc_default(context, &_krb425_ccache); if (r) return r; } if (!client_principal) { if (client) { r = krb5_parse_name(context, client, &client_principal); } else { r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal); } if (r) return r; } *realm = extract_realm(context, client_principal); if (*realm == NULL) return ENOMEM; return(r); }