several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
517 lines
12 KiB
C
517 lines
12 KiB
C
/*
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* Copyright (c) 1997-2006 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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#include <vis.h>
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struct facility {
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int min;
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int max;
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krb5_log_log_func_t log_func;
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krb5_log_close_func_t close_func;
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void *data;
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};
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static struct facility*
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log_realloc(krb5_log_facility *f)
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{
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struct facility *fp;
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fp = realloc(f->val, (f->len + 1) * sizeof(*f->val));
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if(fp == NULL)
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return NULL;
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f->len++;
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f->val = fp;
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fp += f->len - 1;
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return fp;
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}
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struct s2i {
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const char *s;
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int val;
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};
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#define L(X) { #X, LOG_ ## X }
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static struct s2i syslogvals[] = {
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L(EMERG),
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L(ALERT),
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L(CRIT),
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L(ERR),
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L(WARNING),
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L(NOTICE),
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L(INFO),
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L(DEBUG),
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L(AUTH),
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#ifdef LOG_AUTHPRIV
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L(AUTHPRIV),
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#endif
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#ifdef LOG_CRON
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L(CRON),
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#endif
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L(DAEMON),
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#ifdef LOG_FTP
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L(FTP),
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#endif
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L(KERN),
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L(LPR),
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L(MAIL),
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#ifdef LOG_NEWS
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L(NEWS),
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#endif
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L(SYSLOG),
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L(USER),
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#ifdef LOG_UUCP
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L(UUCP),
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#endif
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L(LOCAL0),
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L(LOCAL1),
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L(LOCAL2),
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L(LOCAL3),
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L(LOCAL4),
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L(LOCAL5),
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L(LOCAL6),
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L(LOCAL7),
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{ NULL, -1 }
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};
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static int
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find_value(const char *s, struct s2i *table)
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{
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while(table->s && strcasecmp(table->s, s))
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table++;
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return table->val;
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_initlog(krb5_context context,
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const char *program,
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krb5_log_facility **fac)
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{
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krb5_log_facility *f = calloc(1, sizeof(*f));
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if(f == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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f->program = strdup(program);
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if(f->program == NULL){
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free(f);
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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*fac = f;
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return 0;
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_addlog_func(krb5_context context,
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krb5_log_facility *fac,
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int min,
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int max,
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krb5_log_log_func_t log_func,
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krb5_log_close_func_t close_func,
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void *data)
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{
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struct facility *fp = log_realloc(fac);
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if(fp == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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fp->min = min;
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fp->max = max;
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fp->log_func = log_func;
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fp->close_func = close_func;
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fp->data = data;
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return 0;
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}
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struct _heimdal_syslog_data{
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int priority;
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};
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static void KRB5_CALLCONV
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log_syslog(const char *timestr,
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const char *msg,
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void *data)
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{
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struct _heimdal_syslog_data *s = data;
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syslog(s->priority, "%s", msg);
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}
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static void KRB5_CALLCONV
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close_syslog(void *data)
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{
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free(data);
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closelog();
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}
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static krb5_error_code
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open_syslog(krb5_context context,
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krb5_log_facility *facility, int min, int max,
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const char *sev, const char *fac)
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{
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struct _heimdal_syslog_data *sd = malloc(sizeof(*sd));
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int i;
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if(sd == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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i = find_value(sev, syslogvals);
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if(i == -1)
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i = LOG_ERR;
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sd->priority = i;
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i = find_value(fac, syslogvals);
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if(i == -1)
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i = LOG_AUTH;
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sd->priority |= i;
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roken_openlog(facility->program, LOG_PID | LOG_NDELAY, i);
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return krb5_addlog_func(context, facility, min, max,
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log_syslog, close_syslog, sd);
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}
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struct file_data{
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const char *filename;
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const char *mode;
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FILE *fd;
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int keep_open;
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};
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static void KRB5_CALLCONV
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log_file(const char *timestr,
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const char *msg,
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void *data)
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{
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struct file_data *f = data;
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char *msgclean;
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size_t len = strlen(msg);
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if(f->keep_open == 0)
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f->fd = fopen(f->filename, f->mode);
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if(f->fd == NULL)
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return;
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/* make sure the log doesn't contain special chars */
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msgclean = malloc((len + 1) * 4);
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if (msgclean == NULL)
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goto out;
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strvisx(msgclean, rk_UNCONST(msg), len, VIS_OCTAL);
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fprintf(f->fd, "%s %s\n", timestr, msgclean);
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free(msgclean);
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out:
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if(f->keep_open == 0) {
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fclose(f->fd);
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f->fd = NULL;
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}
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}
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static void KRB5_CALLCONV
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close_file(void *data)
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{
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struct file_data *f = data;
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if(f->keep_open && f->filename)
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fclose(f->fd);
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free(data);
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}
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static krb5_error_code
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open_file(krb5_context context, krb5_log_facility *fac, int min, int max,
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const char *filename, const char *mode, FILE *f, int keep_open)
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{
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struct file_data *fd = malloc(sizeof(*fd));
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if(fd == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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fd->filename = filename;
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fd->mode = mode;
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fd->fd = f;
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fd->keep_open = keep_open;
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return krb5_addlog_func(context, fac, min, max, log_file, close_file, fd);
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_addlog_dest(krb5_context context, krb5_log_facility *f, const char *orig)
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{
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krb5_error_code ret = 0;
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int min = 0, max = -1, n;
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char c;
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const char *p = orig;
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n = sscanf(p, "%d%c%d/", &min, &c, &max);
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if(n == 2){
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if(c == '/') {
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if(min < 0){
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max = -min;
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min = 0;
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}else{
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max = min;
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}
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}
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}
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if(n){
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p = strchr(p, '/');
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if(p == NULL) {
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krb5_set_error_message(context, HEIM_ERR_LOG_PARSE,
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N_("failed to parse \"%s\"", ""), orig);
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return HEIM_ERR_LOG_PARSE;
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}
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p++;
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}
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if(strcmp(p, "STDERR") == 0){
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ret = open_file(context, f, min, max, NULL, NULL, stderr, 1);
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}else if(strcmp(p, "CONSOLE") == 0){
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ret = open_file(context, f, min, max, "/dev/console", "w", NULL, 0);
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}else if(strncmp(p, "FILE", 4) == 0 && (p[4] == ':' || p[4] == '=')){
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char *fn;
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FILE *file = NULL;
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int keep_open = 0;
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fn = strdup(p + 5);
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if(fn == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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if(p[4] == '='){
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int i = open(fn, O_WRONLY | O_CREAT |
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O_TRUNC | O_APPEND, 0666);
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if(i < 0) {
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ret = errno;
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krb5_set_error_message(context, ret,
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N_("open(%s) logile: %s", ""), fn,
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strerror(ret));
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free(fn);
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return ret;
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}
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rk_cloexec(i);
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file = fdopen(i, "a");
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if(file == NULL){
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ret = errno;
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close(i);
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krb5_set_error_message(context, ret,
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N_("fdopen(%s) logfile: %s", ""),
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fn, strerror(ret));
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free(fn);
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return ret;
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}
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keep_open = 1;
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}
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ret = open_file(context, f, min, max, fn, "a", file, keep_open);
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}else if(strncmp(p, "DEVICE", 6) == 0 && (p[6] == ':' || p[6] == '=')){
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ret = open_file(context, f, min, max, strdup(p + 7), "w", NULL, 0);
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}else if(strncmp(p, "SYSLOG", 6) == 0 && (p[6] == '\0' || p[6] == ':')){
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char severity[128] = "";
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char facility[128] = "";
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p += 6;
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if(*p != '\0')
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p++;
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if(strsep_copy(&p, ":", severity, sizeof(severity)) != -1)
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strsep_copy(&p, ":", facility, sizeof(facility));
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if(*severity == '\0')
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strlcpy(severity, "ERR", sizeof(severity));
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if(*facility == '\0')
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strlcpy(facility, "AUTH", sizeof(facility));
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ret = open_syslog(context, f, min, max, severity, facility);
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}else{
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ret = HEIM_ERR_LOG_PARSE; /* XXX */
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krb5_set_error_message (context, ret,
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N_("unknown log type: %s", ""), p);
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}
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return ret;
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_openlog(krb5_context context,
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const char *program,
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krb5_log_facility **fac)
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{
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krb5_error_code ret;
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char **p, **q;
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ret = krb5_initlog(context, program, fac);
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if(ret)
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return ret;
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p = krb5_config_get_strings(context, NULL, "logging", program, NULL);
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if(p == NULL)
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p = krb5_config_get_strings(context, NULL, "logging", "default", NULL);
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if(p){
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for(q = p; *q && ret == 0; q++)
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ret = krb5_addlog_dest(context, *fac, *q);
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krb5_config_free_strings(p);
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}else
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ret = krb5_addlog_dest(context, *fac, "SYSLOG");
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return ret;
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_closelog(krb5_context context,
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krb5_log_facility *fac)
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{
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int i;
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for(i = 0; i < fac->len; i++)
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(*fac->val[i].close_func)(fac->val[i].data);
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free(fac->val);
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free(fac->program);
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fac->val = NULL;
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fac->len = 0;
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fac->program = NULL;
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free(fac);
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return 0;
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}
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#undef __attribute__
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#define __attribute__(X)
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_vlog_msg(krb5_context context,
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krb5_log_facility *fac,
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char **reply,
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int level,
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const char *fmt,
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va_list ap)
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__attribute__((format (printf, 5, 0)))
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{
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char *msg = NULL;
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const char *actual = NULL;
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char buf[64];
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time_t t = 0;
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int i;
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for(i = 0; fac && i < fac->len; i++)
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if(fac->val[i].min <= level &&
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(fac->val[i].max < 0 || fac->val[i].max >= level)) {
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if(t == 0) {
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t = time(NULL);
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krb5_format_time(context, t, buf, sizeof(buf), TRUE);
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}
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if(actual == NULL) {
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int ret = vasprintf(&msg, fmt, ap);
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if(ret < 0 || msg == NULL)
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actual = fmt;
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else
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actual = msg;
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}
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(*fac->val[i].log_func)(buf, actual, fac->val[i].data);
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}
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if(reply == NULL)
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free(msg);
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else
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*reply = msg;
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return 0;
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_vlog(krb5_context context,
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krb5_log_facility *fac,
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int level,
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const char *fmt,
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va_list ap)
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__attribute__((format (printf, 4, 0)))
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{
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return krb5_vlog_msg(context, fac, NULL, level, fmt, ap);
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_log_msg(krb5_context context,
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krb5_log_facility *fac,
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int level,
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char **reply,
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const char *fmt,
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...)
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__attribute__((format (printf, 5, 6)))
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{
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va_list ap;
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krb5_error_code ret;
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va_start(ap, fmt);
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ret = krb5_vlog_msg(context, fac, reply, level, fmt, ap);
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va_end(ap);
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return ret;
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_log(krb5_context context,
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krb5_log_facility *fac,
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int level,
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const char *fmt,
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...)
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__attribute__((format (printf, 4, 5)))
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{
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va_list ap;
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krb5_error_code ret;
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va_start(ap, fmt);
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ret = krb5_vlog(context, fac, level, fmt, ap);
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va_end(ap);
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return ret;
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}
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void KRB5_LIB_FUNCTION
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_krb5_debug(krb5_context context,
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int level,
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const char *fmt,
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...)
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__attribute__((format (printf, 3, 4)))
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{
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va_list ap;
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if (context == NULL || context->debug_dest == NULL)
|
|
return;
|
|
|
|
va_start(ap, fmt);
|
|
krb5_vlog(context, context->debug_dest, level, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
krb5_boolean KRB5_LIB_FUNCTION
|
|
_krb5_have_debug(krb5_context context, int level)
|
|
{
|
|
if (context == NULL || context->debug_dest == NULL)
|
|
return 0 ;
|
|
return 1;
|
|
}
|