#include <afs/venus.h>
#include <afs/ptserver.h>
#include <afs/ptuser.h>
+#include <afs/pterror.h>
#include <afs/dirpath.h>
+#include <afs/afsutil.h>
#include "aklog.h"
#include "linked_list.h"
char realm[REALM_SZ];
} cellinfo_t;
-struct afsconf_cell ak_cellconfig; /* General information about the cell */
-static char linkedcell[MAXCELLCHARS+1];
-static char linkedcell2[MAXCELLCHARS+1];
static krb5_ccache _krb425_ccache = NULL;
/*
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 *);
+static int get_user_realm(krb5_context, char **);
#define TRYAGAIN(x) (x == AKLOG_TRYAGAIN || \
x == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || \
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);
+#else
str = error_message(code);
+#endif
}
fputs(str, stderr);
fputs(" ", stderr);
+#ifdef HAVE_KRB5_SVC_GET_MSG
+ krb5_free_string(str);
+#endif
}
if (fmt) {
vfprintf(stderr, fmt, ap);
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)
{
static int
-get_cellconfig(char *cell, struct afsconf_cell *cellconfig, char *local_cell,
- char *linkedcell)
+get_cellconfig(char *cell, struct afsconf_cell *cellconfig, char **local_cell)
{
int status = AKLOG_SUCCESS;
struct afsconf_dir *configdir;
- memset(local_cell, 0, sizeof(local_cell));
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(AFSDIR_CLIENT_ETC_DIRPATH))) {
fprintf(stderr,
"%s: can't get afs configuration (afsconf_Open(%s))\n",
exit(AKLOG_AFS);
}
- if (afsconf_GetLocalCell(configdir, local_cell, MAXCELLCHARS)) {
+ 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;
+ cell = *local_cell;
- linkedcell[0] = '\0';
+ /* 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;
}
- if (cellconfig->linkedCell)
- strncpy(linkedcell,cellconfig->linkedCell,MAXCELLCHARS);
-
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");
+ 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_token **tokenPtr, char **userPtr) {
+ char username[BUFSIZ];
+ struct ktc_token *token;
+#ifdef HAVE_NO_KRB5_524
+ char *p;
+ int len;
+#else
+ int status;
+ char k4name[ANAME_SZ];
+ char k4inst[INST_SZ];
+ char k4realm[REALM_SZ];
+#endif
+
+ 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
+
+ token = malloc(sizeof(struct ktc_token));
+ if (token == NULL)
+ return ENOMEM;
+
+ memset(token, 0, sizeof(struct ktc_token));
+
+ token->kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
+ token->startTime = v5cred->times.starttime;;
+ token->endTime = v5cred->times.endtime;
+ memcpy(&token->sessionKey, get_cred_keydata(v5cred),
+ get_cred_keylen(v5cred));
+ token->ticketLen = v5cred->ticket.length;
+ memcpy(token->ticket, v5cred->ticket.data, token->ticketLen);
+
+ *tokenPtr = token;
+ *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_token **tokenPtr, char **userPtr) {
+ *tokenPtr = NULL;
+ *userPtr = NULL;
+
+ return 0;
+}
+#else
+static int
+rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred,
+ struct ktc_token **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);
+ }
+
+ token = malloc(sizeof(struct ktc_token));
+ 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);
+
+ 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_token **token, char **authuser, int *foreign) {
+ krb5_creds *v5cred;
+ char *realmUsed = NULL;
+ char *username = NULL;
+ int status;
+ size_t len;
+
+ *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 {
+ len = strlen(username)+strlen(realmUsed)+2;
+ *authuser = malloc(len);
+ afs_snprintf(*authuser, len, "%s@%s", username, realmUsed);
+ *foreign = 1;
+ }
+
+out:
+ if (realmUsed)
+ free(realmUsed);
+ if (username)
+ free(username);
+
+ return status;
+}
+
+static int
+get_kernel_token(struct afsconf_cell *cell, struct ktc_token **tokenPtr) {
+ struct ktc_principal client, server;
+ struct ktc_token *token;
+ int ret;
+
+ *tokenPtr = NULL;
+
+ strncpy(server.name, AFSKEY, MAXKTCNAMELEN - 1);
+ strncpy(server.instance, AFSINST, MAXKTCNAMELEN - 1);
+ strncpy(server.cell, cell->name, MAXKTCREALMLEN - 1);
+
+ token = malloc(sizeof(struct ktc_token));
+ if (token == NULL)
+ return ENOMEM;
+
+ memset(token, 0, sizeof(struct ktc_token));
+
+ ret = ktc_GetToken(&server, token, sizeof(struct ktc_token), &client);
+ if (ret) {
+ free(token);
+ return ret;
+ }
+
+ *tokenPtr = token;
+ return 0;
+}
+
+static int
+set_kernel_token(struct afsconf_cell *cell, char *username,
+ struct ktc_token *token, int setpag)
+{
+ struct ktc_principal client, server;
+
+ strncpy(client.name, username, MAXKTCNAMELEN - 1);
+ strcpy(client.instance, "");
+ strncpy(client.cell, cell->name, MAXKTCREALMLEN - 1);
+
+ strncpy(server.name, AFSKEY, MAXKTCNAMELEN - 1);
+ strncpy(server.instance, AFSINST, MAXKTCNAMELEN - 1);
+ strncpy(server.cell, cell->name, MAXKTCREALMLEN - 1);
+
+ return ktc_SetToken(&server, token, &client, setpag);
+}
+
+static int
+tokens_equal(struct ktc_token *tokenA, struct ktc_token *tokenB) {
+ return (tokenA != NULL && tokenB != NULL &&
+ tokenA->kvno == tokenB->kvno &&
+ tokenA->ticketLen == tokenB->ticketLen &&
+ !memcmp(&tokenA->sessionKey, &tokenB->sessionKey,
+ sizeof(tokenA->sessionKey)) &&
+ !memcmp(tokenA->ticket, tokenB->ticket, tokenA->ticketLen));
+}
+
/*
* 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)
+auth_to_cell(krb5_context context, char *cell, char *realm, char **linkedcell)
{
int status = AKLOG_SUCCESS;
- char username[BUFSIZ]; /* To hold client username structure */
+ int isForeign = 0;
+ char *username = NULL; /* To hold client username structure */
afs_int32 viceId; /* AFS uid of user */
- char realm_of_user[REALM_SZ]; /* Kerberos realm of user */
- char *realm_from_princ = 0 ; /* Calculated realm data */
- char *realm_of_cell = 0; /* Pointer to realm we're using */
- int retry; /* round, and round we go ... */
-
- char local_cell[MAXCELLCHARS+1];
- char cell_to_use[MAXCELLCHARS+1]; /* Cell to authenticate to */
- static char confname[512] = { 0 };
- krb5_creds *v5cred = NULL;
- struct ktc_principal aserver;
- struct ktc_principal aclient;
- struct ktc_token atoken, btoken;
-
- memset(realm_of_user, 0, sizeof(realm_of_user));
-
- if (confname[0] == '\0') {
- strncpy(confname, AFSDIR_CLIENT_ETC_DIRPATH, sizeof(confname));
- confname[sizeof(confname) - 2] = '\0';
- }
+ char *local_cell = NULL;
+ struct ktc_token *token;
+ struct ktc_token *btoken;
+ struct afsconf_cell cellconf;
/* NULL or empty cell returns information on local cell */
- if ((status = get_cellconfig(cell, &ak_cellconfig,
- local_cell, linkedcell)))
+ if ((status = get_cellconfig(cell, &cellconf, &local_cell)))
return(status);
- strncpy(cell_to_use, ak_cellconfig.name, MAXCELLCHARS);
- cell_to_use[MAXCELLCHARS] = 0;
-
- if (ll_string(&authedcells, ll_s_check, cell_to_use)) {
- if (dflag) {
- printf("Already authenticated to %s (or tried to)\n",
- cell_to_use);
+ if (linkedcell != NULL) {
+ if (cellconf.linkedCell != NULL) {
+ *linkedcell = strdup(cellconf.linkedCell);
+ if (*linkedcell == NULL) {
+ status = ENOMEM;
+ goto out;
+ }
+ } else {
+ *linkedcell = NULL;
}
- return(AKLOG_SUCCESS);
+ }
+
+ 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;
}
/*
* before we try rather than after so that we will not try
* and fail repeatedly for one cell.
*/
- ll_string(&authedcells, ll_s_add, cell_to_use);
+ ll_string(&authedcells, ll_s_add, cellconf.name);
/*
* Record this cell in the list of zephyr subscriptions. We may
* can return something different depending on whether or not we
* are in -noauth mode.
*/
- if (ll_string(&zsublist, ll_s_add, cell_to_use) == LL_FAILURE) {
+ if (ll_string(&zsublist, ll_s_add, cellconf.name) == LL_FAILURE) {
fprintf(stderr,
"%s: failure adding cell %s to zephyr subscriptions list.\n",
- progname, cell_to_use);
+ progname, cellconf.name);
exit(AKLOG_MISC);
}
if (ll_string(&zsublist, ll_s_add, local_cell) == LL_FAILURE) {
}
if (!noauth) {
- if (dflag) {
- printf("Authenticating to cell %s (server %s).\n",
- cell_to_use, ak_cellconfig.hostName[0]);
- }
-
- 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");
- return(AKLOG_KERBEROS);
- }
-
- retry = 1;
-
- while(retry) {
-
- /* 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.
- */
-
- /* Cell on command line - use that one */
- if (realm && realm[0]) {
- realm_of_cell = realm;
- status = AKLOG_TRYAGAIN;
- if (dflag) {
- printf("We were told to authenticate to realm %s.\n",
- realm);
- }
- } else {
- /* Initially, try using afs/cell@USERREALM */
- if (dflag) {
- printf("Trying to authenticate to user's realm %s.\n",
- realm_of_user);
- }
-
- realm_of_cell = realm_of_user;
- status = get_credv5(context, AFSKEY, cell_to_use,
- 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, &ak_cellconfig,
- FALSE);
- if (!realm_of_cell) {
- fprintf(stderr,
- "%s: Couldn't figure out realm for cell %s.\n",
- progname, cell_to_use);
- exit(AKLOG_MISC);
- }
-
- if (dflag) {
- if (realm_of_cell[0])
- printf("We've deduced that we need to authenticate"
- " to realm %s.\n", realm_of_cell);
- else
- printf("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_to_use, realm_of_cell)!=0) {
- status = get_credv5(context, AFSKEY, cell_to_use,
- 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,
- &ak_cellconfig, TRUE);
- if (!realm_of_cell) {
- fprintf(stderr,
- "%s: Couldn't figure out realm for cell "
- "%s.\n", progname, cell_to_use);
- exit(AKLOG_MISC);
- }
- if (dflag) {
- printf("We've deduced that we need to authenticate"
- " to realm %s.\n", realm_of_cell);
- }
- }
- status = get_credv5(context, AFSKEY, cell_to_use,
- 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_to_use, 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_to_use,
- 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) {
- if (dflag) {
- printf("Kerberos error code returned by get_cred : %d\n",
- status);
- }
- fprintf(stderr, "%s: Couldn't get %s AFS tickets:\n",
- progname, cell_to_use);
- afs_com_err(progname, status, "while getting AFS tickets");
- return(AKLOG_KERBEROS);
- }
-
- /* 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 !defined(USING_HEIMDAL) && defined(HAVE_KRB5_DECODE_TICKET)
- if (strcmp(realm_of_cell, "") == 0) {
- krb5_error_code code;
- krb5_ticket *ticket;
-
- code = krb5_decode_ticket(&v5cred->ticket, &ticket);
-
- if (code != 0) {
- fprintf(stderr,
- "%s: Couldn't decode ticket to determine realm for "
- "cell %s.\n",
- progname, cell_to_use);
- } else {
- int len = realm_len(context, ticket->server);
- /* This really shouldn't happen. */
- if (len > REALM_SZ-1)
- len = REALM_SZ-1;
-
- realm_from_princ = (char *) malloc(sizeof(char) * (len+1));
-
- strncpy(realm_from_princ, realm_data(context, ticket->server),
- len);
- realm_from_princ[len] = 0;
- realm_of_cell = realm_from_princ;
-
- krb5_free_ticket(context, ticket);
- }
- }
-#endif
-
- 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.
- */
-
- if (! do524) {
- char k4name[ANAME_SZ], k4inst[INST_SZ], k4realm[REALM_SZ];
-#ifdef HAVE_NO_KRB5_524
- char *p;
- int len;
-#endif
-
- if (dflag)
- printf("Using Kerberos V5 ticket natively\n");
-
-#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
+ afs_dprintf("Authenticating to cell %s (server %s).\n", cellconf.name,
+ cellconf.hostName[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);
-#ifndef HAVE_NO_KRB5_524
- } else {
- CREDENTIALS cred;
+ status = rxkad_get_token(context, &cellconf, realm, &token,
+ &username, &isForeign);
+ if (status)
+ return status;
- if (dflag)
- printf("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);
- }
-
- atoken.kvno = cred.kvno;
- atoken.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
- */
- atoken.endTime = v5cred->times.endtime;
- memcpy(&atoken.sessionKey, cred.session, 8);
- atoken.ticketLen = cred.ticket_st.length;
- memcpy(atoken.ticket, cred.ticket_st.dat, atoken.ticketLen);
-#endif /* HAVE_NO_KRB5_524 */
- }
-
if (!force &&
- !ktc_GetToken(&aserver, &btoken, sizeof(btoken), &aclient) &&
- atoken.kvno == btoken.kvno &&
- atoken.ticketLen == btoken.ticketLen &&
- !memcmp(&atoken.sessionKey, &btoken.sessionKey, sizeof(atoken.sessionKey)) &&
- !memcmp(atoken.ticket, btoken.ticket, atoken.ticketLen)) {
-
- if (dflag) {
- printf("Identical tokens already exist; skipping.\n");
- }
- return 0;
+ !get_kernel_token(&cellconf, &btoken) &&
+ tokens_equal(token, btoken)) {
+ afs_dprintf("Identical tokens already exist; skipping.\n");
+ status = AKLOG_SUCCESS;
+ goto out;
}
#ifdef FORCE_NOPRDB
#endif
if (noprdb) {
- if (dflag) {
- printf("Not resolving name %s to id (-noprdb set)\n",
- username);
- }
+ afs_dprintf("Not resolving name %s to id (-noprdb set)\n", username);
}
else {
- if (strcmp(realm_of_user, realm_of_cell)) {
- strcat(username, "@");
- strcat(username, realm_of_user);
- }
+ afs_dprintf("About to resolve name %s to id in cell %s.\n", username,
+ cellconf.name);
- if (dflag) {
- printf("About to resolve name %s to id in cell %s.\n",
- username, aserver.cell);
- }
+ if (!pr_Initialize (0, AFSDIR_CLIENT_ETC_DIRPATH, cellconf.name))
+ status = pr_SNameToId (username, &viceId);
- if (!pr_Initialize (0, confname, aserver.cell))
- status = pr_SNameToId (username, &viceId);
-
- if (dflag) {
- if (status)
- printf("Error %d\n", status);
- else
- printf("Id %d\n", (int) viceId);
- }
+ if (status)
+ afs_dprintf("Error %d\n", status);
+ else
+ afs_dprintf("Id %d\n", (int) viceId);
/*
*/
#ifdef ALLOW_REGISTER
- if ((status == 0) && (viceId == ANONYMOUSID) &&
- (strcmp(realm_of_user, realm_of_cell) != 0)) {
- if (dflag) {
- printf("doing first-time registration of %s "
- "at %s\n", username, cell_to_use);
- }
+ if ((status == 0) && (viceId == ANONYMOUSID) && isForeign) {
+ afs_dprintf("doing first-time registration of %s at %s\n",
+ username, cellconf.name);
viceId = 0;
- strncpy(aclient.name, username, MAXKTCNAMELEN - 1);
- strcpy(aclient.instance, "");
- strncpy(aclient.cell, realm_of_user, MAXKTCREALMLEN - 1);
- if ((status = ktc_SetToken(&aserver, &atoken, &aclient, 0))) {
+
+ status = set_kernel_token(&cellconf, username, token, 0);
+ if (status) {
afs_com_err(progname, status,
"while obtaining tokens for cell %s",
- cell_to_use);
+ cellconf.name);
status = AKLOG_TOKEN;
}
* level
*/
- if ((status = pr_Initialize(1L, confname, aserver.cell))) {
+ 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, cell_to_use,
+ 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, cell_to_use);
+ username, viceId, cellconf.name);
}
}
#endif /* ALLOW_REGISTER */
*/
if ((status == 0) && (viceId != ANONYMOUSID)) {
- sprintf(username, "AFS ID %d", (int) viceId);
+ free(username);
+ if (afs_asprintf(&username, "AFS ID %d", (int) viceId) < 0) {
+ status = ENOMEM;
+ username = NULL;
+ goto out;
+ }
}
}
- if (dflag) {
- fprintf(stdout, "Set username to %s\n", username);
- }
+ afs_dprintf("Set username to %s\n", username);
- /* 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);
+ afs_dprintf("Setting tokens. %s @ %s \n", username, cellconf.name);
- if (dflag) {
- printf("Setting tokens. %s / %s @ %s \n",
- aclient.name, aclient.instance, aclient.cell );
- }
#ifndef AFS_AIX51_ENV
- /* on AIX 4.1.4 with AFS 3.4a+ if a write is not done before
+ /* 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
- if ((status = ktc_SetToken(&aserver, &atoken, &aclient, afssetpag))) {
+ status = set_kernel_token(&cellconf, username, token, afssetpag);
+ if (status) {
afs_com_err(progname, status, "while obtaining tokens for cell %s",
- cell_to_use);
+ cellconf.name);
status = AKLOG_TOKEN;
}
}
else
- if (dflag) {
- printf("Noauth mode; not authenticating.\n");
- }
-
+ afs_dprintf("Noauth mode; not authenticating.\n");
+
+out:
+ if (local_cell)
+ free(local_cell);
+ if (username)
+ free(username);
+
return(status);
}
vio.in_size = 0;
vio.out = outbuf;
- if (dflag) {
- printf("Getting list of hosts for %s\n", file);
- }
+ afs_dprintf("Getting list of hosts for %s\n", file);
+
/* Don't worry about errors. */
if (!pioctl(file, VIOCWHEREIS, &vio, 1)) {
phosts = (long *) outbuf;
for (i = 0; phosts[i]; i++) {
if (hosts) {
in.s_addr = phosts[i];
- if (dflag) {
- printf("Got host %s\n", inet_ntoa(in));
- }
+ 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))) {
- if (dflag) {
- printf("Got host %s\n", hp->h_name);
- }
+ afs_dprintf("Got host %s\n", hp->h_name);
ll_string(&zsublist, ll_s_add, hp->h_name);
}
}
auth_to_path(krb5_context context, char *path)
{
int status = AKLOG_SUCCESS;
- int auth_to_cell_status = AKLOG_SUCCESS;
+ int auth_status = AKLOG_SUCCESS;
char *nextpath;
char pathtocheck[MAXPATHLEN + 1];
/* Go on to the next level down the path */
while ((nextpath = next_path(NULL))) {
strcpy(pathtocheck, nextpath);
- if (dflag) {
- printf("Checking directory %s\n", 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
add_hosts(pathtocheck);
if ((endofcell = strchr(mountpoint, VOLMARKER))) {
*endofcell = '\0';
- if ((auth_to_cell_status = auth_to_cell(context, cell, NULL))) {
+ if ((auth_status = auth_to_cell(context, cell, NULL, NULL))) {
if (status == AKLOG_SUCCESS)
- status = auth_to_cell_status;
- else if (status != auth_to_cell_status)
+ status = auth_status;
+ else if (status != auth_status)
status = AKLOG_SOMETHINGSWRONG;
}
}
extern char *progname; /* Name of this program */
- extern int dflag; /* Debug mode */
-
int cmode = FALSE; /* Cellname mode */
int pmode = FALSE; /* Path name 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;
memset(&cellinfo, 0, sizeof(cellinfo));
progname = argv[0];
krb5_init_context(&context);
- initialize_ktc_error_table ();
+ 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);
/*
if ((cells.nelements + paths.nelements) == 0) {
struct passwd *pwd;
- status = auth_to_cell(context, NULL, NULL);
+ status = auth_to_cell(context, 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[0]) {
- strncpy(linkedcell2,linkedcell,MAXCELLCHARS);
- if (dflag) {
- printf("Linked cell: %s\n", linkedcell);
- }
- status = auth_to_cell(context, linkedcell2, NULL);
+ if (!status && linked && linkedcell != NULL) {
+ afs_dprintf("Linked cell: %s\n", linkedcell);
+ status = auth_to_cell(context, linkedcell, NULL, NULL);
+ }
+ if (linkedcell) {
+ free(linkedcell);
+ linkedcell = NULL;
}
/*
if ((stat(xlog_path, &sbuf) == 0) &&
((f = fopen(xlog_path, "r")) != NULL)) {
- if (dflag) {
- printf("Reading %s for cells to authenticate to.\n",
- xlog_path);
- }
+ 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';
- if (dflag) {
- printf("Found cell %s in %s.\n", fcell, xlog_path);
- }
+ afs_dprintf("Found cell %s in %s.\n", fcell, xlog_path);
- auth_status = auth_to_cell(context, fcell, NULL);
+ auth_status = auth_to_cell(context, fcell, NULL, NULL);
if (status == AKLOG_SUCCESS)
status = auth_status;
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));
- if ((status = auth_to_cell(context, cellinfo.cell, cellinfo.realm)))
+ if ((status = auth_to_cell(context, cellinfo.cell, cellinfo.realm,
+ &linkedcell)))
somethingswrong++;
else {
- if (linked && linkedcell[0]) {
- strncpy(linkedcell2,linkedcell,MAXCELLCHARS);
- if (dflag) {
- printf("Linked cell: %s\n", linkedcell);
- }
- if ((status = auth_to_cell(context,linkedcell2,
- cellinfo.realm)))
+ if (linked && linkedcell != NULL) {
+ afs_dprintf("Linked cell: %s\n", linkedcell);
+ if ((status = auth_to_cell(context, linkedcell,
+ cellinfo.realm, NULL)))
somethingswrong++;
}
+ if (linkedcell != NULL) {
+ free(linkedcell);
+ linkedcell = NULL;
+ }
}
}
krb5_ticket ticket_reply[1];
krb5_enc_tkt_part enc_tkt_reply[1];
krb5_address address[30], *faddr[30];
-#endif
krb5_data * temp;
+#endif
int i;
static int any_enctype[] = {0};
*out_creds = 0;
krb5_kt_close(context, kt);
if (creds) krb5_free_creds(context, creds);
krb5_free_keyblock_contents(context, session_key);
-out:
return code;
#else
return -1;
krb5_error_code r;
static krb5_principal client_principal = 0;
- if (dflag) {
- printf("Getting tickets: %s%s%s@%s\n", name, (inst && inst[0])
- ? "/" : "", inst ? inst : "", realm);
- }
+ 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 */
static int
-get_user_realm(krb5_context context, char *realm)
+get_user_realm(krb5_context context, char **realm)
{
static krb5_principal client_principal = 0;
- int i;
krb5_error_code r = 0;
+ *realm = NULL;
+
if (!_krb425_ccache)
krb5_cc_default(context, &_krb425_ccache);
if (!client_principal) {
return r;
}
- 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;
+ *realm = extract_realm(context, client_principal);
+ if (*realm == NULL)
+ return ENOMEM;
return(r);
}
git://git.openafs.org / openafs.git / blobdiff