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added kerberos auth

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ulab-original
jsorg71 19 years ago
parent 37df9f4e53
commit dd96a1aa04
2 changed files with 416 additions and 11 deletions
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33
sesman/Makefile
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@ -1,20 +1,13 @@
SESMANOBJ = sesman.o config.o tcp.o sig.o session.o env.o \
../common/os_calls.o \
../common/d3des.o \
../common/list.o \
../common/file.o \
../common/log.o
os_calls.o d3des.o list.o file.o log.o
SESRUNOBJ = sesrun.o config.o tcp.o \
../common/os_calls.o \
../common/d3des.o \
../common/list.o \
../common/file.o \
../common/log.o
os_calls.o d3des.o list.o file.o log.o
CFLAGS = -Wall -O2 -I../common
LDFLAGS = -L /usr/gnu/lib
C_OS_FLAGS = $(CFLAGS) -c
CC = gcc
all: pam tools
@ -28,8 +21,26 @@ pam: $(SESMANOBJ) verify_user_pam.o
pam_userpass: $(SESMANOBJ) verify_user_pam_userpass.o
$(CC) $(LDFLAGS) -o sesman $(SESMANOBJ) verify_user_pam_userpass.o -ldl -lpam -lpam_userpass
kerberos: $(SESMANOBJ) verify_user_kerberos.o
$(CC) $(LDFLAGS) -o sesman $(SESMANOBJ) verify_user_kerberos.o -ldl -lkrb5
tools: $(SESRUNOBJ)
$(CC) $(LDFLAGS) -o sesrun $(SESRUNOBJ) -ldl
clean:
rm -f $(SESMANOBJ) verify_user.o verify_user_pam.o verify_user_pam_userpass.o sesman sesrun.o sesrun
rm -f $(SESMANOBJ) verify_user.o verify_user_pam.o verify_user_pam_userpass.o verify_user_kerberos.o sesman sesrun.o sesrun
os_calls.o:
$(CC) $(C_OS_FLAGS) ../common/os_calls.c
d3des.o:
$(CC) $(C_OS_FLAGS) ../common/d3des.c
list.o:
$(CC) $(C_OS_FLAGS) ../common/list.c
file.o:
$(CC) $(C_OS_FLAGS) ../common/file.c
log.o:
$(CC) $(C_OS_FLAGS) ../common/log.c

394
sesman/verify_user_kerberos.c
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@ -0,0 +1,394 @@
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2005
authenticate user using kerberos
*/
#include "arch.h"
#include "os_calls.h"
#include <krb5.h>
typedef enum { INIT_PW, INIT_KT, RENEW, VALIDATE } action_type;
struct k_opts
{
/* in seconds */
krb5_deltat starttime;
krb5_deltat lifetime;
krb5_deltat rlife;
int forwardable;
int proxiable;
int addresses;
int not_forwardable;
int not_proxiable;
int no_addresses;
int verbose;
char* principal_name;
char* service_name;
char* keytab_name;
char* k5_cache_name;
char* k4_cache_name;
action_type action;
};
struct k5_data
{
krb5_context ctx;
krb5_ccache cc;
krb5_principal me;
char* name;
};
struct user_info
{
char* name;
char* pass;
};
/******************************************************************************/
/* returns boolean */
static int DEFAULT_CC
k5_begin(struct k_opts* opts, struct k5_data* k5, struct user_info* u_info)
{
krb5_error_code code = 0;
code = krb5_init_context(&k5->ctx);
if (code != 0)
{
g_printf("krb5_init_context failed in k5_begin\n");
return 0;
}
if (opts->k5_cache_name)
{
code = krb5_cc_resolve(k5->ctx, opts->k5_cache_name, &k5->cc);
if (code != 0)
{
g_printf("krb5_cc_resolve failed in k5_begin\n");
return 0;
}
}
else
{
code = krb5_cc_default(k5->ctx, &k5->cc);
if (code != 0)
{
g_printf("krb5_cc_default failed in k5_begin\n");
return 0;
}
}
if (opts->principal_name)
{
/* Use specified name */
code = krb5_parse_name(k5->ctx, opts->principal_name, &k5->me);
if (code != 0)
{
g_printf("krb5_parse_name failed in k5_begin\n");
return 0;
}
}
else
{
/* No principal name specified */
if (opts->action == INIT_KT)
{
/* Use the default host/service name */
code = krb5_sname_to_principal(k5->ctx, NULL, NULL,
KRB5_NT_SRV_HST, &k5->me);
if (code != 0)
{
g_printf("krb5_sname_to_principal failed in k5_begin\n");
return 0;
}
}
else
{
/* Get default principal from cache if one exists */
code = krb5_cc_get_principal(k5->ctx, k5->cc, &k5->me);
if (code != 0)
{
code = krb5_parse_name(k5->ctx, u_info->name, &k5->me);
if (code != 0)
{
g_printf("krb5_parse_name failed in k5_begin\n");
return 0;
}
}
}
}
code = krb5_unparse_name(k5->ctx, k5->me, &k5->name);
if (code != 0)
{
g_printf("krb5_unparse_name failed in k5_begin\n");
return 0;
}
opts->principal_name = k5->name;
return 1;
}
/******************************************************************************/
static void DEFAULT_CC
k5_end(struct k5_data* k5)
{
if (k5->name)
{
krb5_free_unparsed_name(k5->ctx, k5->name);
}
if (k5->me)
{
krb5_free_principal(k5->ctx, k5->me);
}
if (k5->cc)
{
krb5_cc_close(k5->ctx, k5->cc);
}
if (k5->ctx)
{
krb5_free_context(k5->ctx);
}
g_memset(k5, 0, sizeof(struct k5_data));
}
/******************************************************************************/
static krb5_error_code KRB5_CALLCONV
kinit_prompter(krb5_context ctx, void* data, const char* name,
const char* banner, int num_prompts, krb5_prompt prompts[])
{
int i;
krb5_prompt_type* types;
krb5_error_code rc;
struct user_info* u_info;
u_info = (struct user_info*)data;
rc = 0;
types = krb5_get_prompt_types(ctx);
for (i = 0; i < num_prompts; i++)
{
if (types[i] == KRB5_PROMPT_TYPE_PASSWORD ||
types[i] == KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN)
{
g_strncpy(prompts[i].reply->data, u_info->pass, 255);
}
}
return rc;
}
/******************************************************************************/
/* returns boolean */
static int
k5_kinit(struct k_opts* opts, struct k5_data* k5, struct user_info* u_info)
{
char* doing;
int notix = 1;
krb5_keytab keytab = 0;
krb5_creds my_creds;
krb5_error_code code = 0;
krb5_get_init_creds_opt options;
krb5_address** addresses;
krb5_get_init_creds_opt_init(&options);
g_memset(&my_creds, 0, sizeof(my_creds));
/*
From this point on, we can goto cleanup because my_creds is
initialized.
*/
if (opts->lifetime)
{
krb5_get_init_creds_opt_set_tkt_life(&options, opts->lifetime);
}
if (opts->rlife)
{
krb5_get_init_creds_opt_set_renew_life(&options, opts->rlife);
}
if (opts->forwardable)
{
krb5_get_init_creds_opt_set_forwardable(&options, 1);
}
if (opts->not_forwardable)
{
krb5_get_init_creds_opt_set_forwardable(&options, 0);
}
if (opts->proxiable)
{
krb5_get_init_creds_opt_set_proxiable(&options, 1);
}
if (opts->not_proxiable)
{
krb5_get_init_creds_opt_set_proxiable(&options, 0);
}
if (opts->addresses)
{
addresses = NULL;
code = krb5_os_localaddr(k5->ctx, &addresses);
if (code != 0)
{
g_printf("krb5_os_localaddr failed in k5_kinit\n");
goto cleanup;
}
krb5_get_init_creds_opt_set_address_list(&options, addresses);
}
if (opts->no_addresses)
{
krb5_get_init_creds_opt_set_address_list(&options, NULL);
}
if ((opts->action == INIT_KT) && opts->keytab_name)
{
code = krb5_kt_resolve(k5->ctx, opts->keytab_name, &keytab);
if (code != 0)
{
g_printf("krb5_kt_resolve failed in k5_kinit\n");
goto cleanup;
}
}
switch (opts->action)
{
case INIT_PW:
code = krb5_get_init_creds_password(k5->ctx, &my_creds, k5->me,
0, kinit_prompter, u_info,
opts->starttime,
opts->service_name,
&options);
break;
case INIT_KT:
code = krb5_get_init_creds_keytab(k5->ctx, &my_creds, k5->me,
keytab,
opts->starttime,
opts->service_name,
&options);
break;
case VALIDATE:
code = krb5_get_validated_creds(k5->ctx, &my_creds, k5->me, k5->cc,
opts->service_name);
break;
case RENEW:
code = krb5_get_renewed_creds(k5->ctx, &my_creds, k5->me, k5->cc,
opts->service_name);
break;
}
if (code != 0)
{
doing = 0;
switch (opts->action)
{
case INIT_PW:
case INIT_KT:
doing = "getting initial credentials";
break;
case VALIDATE:
doing = "validating credentials";
break;
case RENEW:
doing = "renewing credentials";
break;
}
if (code == KRB5KRB_AP_ERR_BAD_INTEGRITY)
{
g_printf("sesman: Password incorrect while %s in k5_kinit\n", doing);
}
else
{
g_printf("sesman: error while %s in k5_kinit\n", doing);
}
goto cleanup;
}
if (!opts->lifetime)
{
/* We need to figure out what lifetime to use for Kerberos 4. */
opts->lifetime = my_creds.times.endtime - my_creds.times.authtime;
}
code = krb5_cc_initialize(k5->ctx, k5->cc, k5->me);
if (code != 0)
{
g_printf("krb5_cc_initialize failed in k5_kinit\n");
goto cleanup;
}
code = krb5_cc_store_cred(k5->ctx, k5->cc, &my_creds);
if (code != 0)
{
g_printf("krb5_cc_store_cred failed in k5_kinit\n");
goto cleanup;
}
notix = 0;
cleanup:
if (my_creds.client == k5->me)
{
my_creds.client = 0;
}
krb5_free_cred_contents(k5->ctx, &my_creds);
if (keytab)
{
krb5_kt_close(k5->ctx, keytab);
}
return notix ? 0 : 1;
}
/******************************************************************************/
/* returns boolean */
int DEFAULT_CC
auth_userpass(char* user, char* pass)
{
struct k_opts opts;
struct k5_data k5;
struct user_info u_info;
int got_k5;
int authed_k5;
g_memset(&opts, 0, sizeof(opts));
opts.action = INIT_PW;
g_memset(&k5, 0, sizeof(k5));
g_memset(&u_info, 0, sizeof(u_info));
u_info.name = user;
u_info.pass = pass;
authed_k5 = 0;
got_k5 = k5_begin(&opts, &k5, &u_info);
if (got_k5)
{
authed_k5 = k5_kinit(&opts, &k5, &u_info);
k5_end(&k5);
}
return authed_k5;
}
/******************************************************************************/
/* returns error */
int DEFAULT_CC
auth_start_session(void)
{
return 0;
}
/******************************************************************************/
int DEFAULT_CC
auth_end(void)
{
return 0;
}
/******************************************************************************/
int DEFAULT_CC
auth_set_env(void)
{
return 0;
}
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