235 lines
7.8 KiB
C
235 lines
7.8 KiB
C
/********************************************************************\
|
|
|
|
Name: auth.c
|
|
Created by: Stefan Ritt
|
|
|
|
Contents: Authentication subroutines. Currently supported:
|
|
|
|
- password file authentication
|
|
- kerberos5 password authentication
|
|
|
|
$Id: elog.c 2350 2010-12-23 10:45:10Z ritt $
|
|
|
|
\********************************************************************/
|
|
|
|
#include "elogd.h"
|
|
|
|
#ifdef HAVE_KRB5
|
|
#include <krb5/krb5.h>
|
|
#endif
|
|
|
|
extern LOGBOOK *lb_list;
|
|
|
|
/* ========================================================================== */
|
|
|
|
/*---- Kerberos5 routines ------------------------------------------*/
|
|
|
|
#ifdef HAVE_KRB5
|
|
|
|
int auth_verify_password_krb5(LOGBOOK *lbs, const char *user, const char *password, char *error_str, int error_size)
|
|
{
|
|
char *princ_name, str[256], realm[256];
|
|
krb5_error_code error;
|
|
krb5_principal princ;
|
|
krb5_context context;
|
|
krb5_creds creds;
|
|
krb5_get_init_creds_opt options;
|
|
|
|
if (krb5_init_context(&context) < 0)
|
|
return FALSE;
|
|
|
|
strlcpy(str, user, sizeof(str));
|
|
if (getcfg(lbs->name, "Kerberos Realm", realm, sizeof(realm))) {
|
|
strlcat(str, "@", sizeof(str));
|
|
strlcat(str, realm, sizeof(str));
|
|
}
|
|
if ((error = krb5_parse_name(context, str, &princ)) != 0) {
|
|
strlcpy(error_str, "<b>Kerberos error:</b><br>", error_size);
|
|
strlcat(error_str, krb5_get_error_message(context, error), error_size);
|
|
strlcat(error_str, ".<br>Please check your Kerberos configuration.", error_size);
|
|
return FALSE;
|
|
}
|
|
|
|
error = krb5_unparse_name(context, princ, &princ_name);
|
|
if (error) {
|
|
strlcpy(error_str, "<b>Kerberos error:</b><br>", error_size);
|
|
strlcat(error_str, krb5_get_error_message(context, error), error_size);
|
|
strlcat(error_str, ".<br>Please check your Kerberos configuration.", error_size);
|
|
return FALSE;
|
|
}
|
|
|
|
if (is_verbose())
|
|
eprintf("Using %s as server principal for authentication\n", princ_name);
|
|
|
|
memset(&options, 0, sizeof(options));
|
|
krb5_get_init_creds_opt_init(&options);
|
|
memset(&creds, 0, sizeof(creds));
|
|
error = krb5_get_init_creds_password(context, &creds, princ,
|
|
(char *)password, NULL,
|
|
NULL, 0, NULL, &options);
|
|
|
|
krb5_free_cred_contents(context, &creds);
|
|
krb5_get_init_creds_opt_free(context, &options);
|
|
krb5_free_context(context);
|
|
|
|
if (error && error != KRB5KDC_ERR_PREAUTH_FAILED) {
|
|
strlcpy(error_str, "<b>Kerberos error:</b><br>", error_size);
|
|
strlcat(error_str, krb5_get_error_message(context, error), error_size);
|
|
strlcat(error_str, ".<br>Please check your Kerberos configuration.", error_size);
|
|
return FALSE;
|
|
}
|
|
|
|
if (error)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
int auth_change_password_krb5(LOGBOOK *lbs, const char *user, const char *old_pwd, const char *new_pwd, char *error_str, int error_size)
|
|
{
|
|
char *princ_name, str[256], realm[256];
|
|
int result_code, n;
|
|
krb5_error_code error;
|
|
krb5_data result_code_string, result_string;
|
|
krb5_principal princ;
|
|
krb5_context context;
|
|
krb5_creds creds;
|
|
krb5_get_init_creds_opt options;
|
|
|
|
if (krb5_init_context(&context) < 0)
|
|
return FALSE;
|
|
|
|
strlcpy(str, user, sizeof(str));
|
|
if (getcfg(lbs->name, "Kerberos Realm", realm, sizeof(realm))) {
|
|
strlcat(str, "@", sizeof(str));
|
|
strlcat(str, realm, sizeof(str));
|
|
}
|
|
if ((error = krb5_parse_name(context, str, &princ)) != 0) {
|
|
strlcpy(error_str, "<b>Kerberos error:</b><br>", error_size);
|
|
strlcat(error_str, krb5_get_error_message(context, error), error_size);
|
|
strlcat(error_str, ".<br>Please check your Kerberos configuration.", error_size);
|
|
return FALSE;
|
|
}
|
|
|
|
error = krb5_unparse_name(context, princ, &princ_name);
|
|
|
|
if (is_verbose())
|
|
eprintf("Using %s as server principal for authentication\n", princ_name);
|
|
|
|
memset(&options, 0, sizeof(options));
|
|
krb5_get_init_creds_opt_init(&options);
|
|
krb5_get_init_creds_opt_set_tkt_life(&options, 300);
|
|
krb5_get_init_creds_opt_set_forwardable(&options, FALSE);
|
|
krb5_get_init_creds_opt_set_proxiable(&options, FALSE);
|
|
|
|
memset(&creds, 0, sizeof(creds));
|
|
error = krb5_get_init_creds_password(context, &creds, princ,
|
|
(char *)old_pwd, NULL,
|
|
NULL, 0, "kadmin/changepw", &options);
|
|
if (error) {
|
|
strlcpy(error_str, "<b>Kerberos error:</b><br>", error_size);
|
|
strlcat(error_str, krb5_get_error_message(context, error), error_size);
|
|
strlcat(error_str, ".<br>Please check your Kerberos configuration.", error_size);
|
|
return FALSE;
|
|
}
|
|
|
|
error = krb5_set_password(context, &creds, (char *)new_pwd, princ,
|
|
&result_code,
|
|
&result_code_string,
|
|
&result_string);
|
|
if (error) {
|
|
strlcpy(error_str, "<b>Kerberos error:</b><br>", error_size);
|
|
strlcat(error_str, krb5_get_error_message(context, error), error_size);
|
|
strlcat(error_str, ".<br>Please check your Kerberos configuration.", error_size);
|
|
return FALSE;
|
|
}
|
|
|
|
if (result_code > 0) {
|
|
if (result_code_string.length > 0) {
|
|
strlcpy(error_str, result_code_string.data, error_size);
|
|
if ((int)result_code_string.length < error_size)
|
|
error_str[result_code_string.length] = 0;
|
|
}
|
|
if (result_string.length > 0) {
|
|
strlcat(error_str, ": ", error_size);
|
|
n = strlen(error_str) + result_string.length;
|
|
strlcat(error_str, result_string.data, error_size);
|
|
if (n < error_size)
|
|
error_str[n] = 0;
|
|
}
|
|
}
|
|
|
|
krb5_free_data_contents(context, &result_code_string);
|
|
krb5_free_data_contents(context, &result_string);
|
|
krb5_free_cred_contents(context, &creds);
|
|
krb5_get_init_creds_opt_free(context, &options);
|
|
krb5_free_context(context);
|
|
|
|
if (result_code > 0)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
/*---- local password file routines --------------------------------*/
|
|
|
|
int auth_verify_password_file(LOGBOOK *lbs, const char *user, const char *password, char *error_str, int error_size)
|
|
{
|
|
char upwd[256], enc_pwd[256];
|
|
|
|
get_user_line(lbs, (char*)user, upwd, NULL, NULL, NULL, NULL, NULL);
|
|
do_crypt(password, enc_pwd, sizeof(enc_pwd));
|
|
|
|
return strcmp(enc_pwd, upwd) == 0;
|
|
}
|
|
|
|
int auth_change_password_file(LOGBOOK *lbs, const char *user, const char *old_pwd, const char *new_pwd, char *error_str, int error_size)
|
|
{
|
|
char str[256], file_name[256];
|
|
PMXML_NODE node;
|
|
|
|
if (lbs == NULL)
|
|
lbs = &lb_list[0];
|
|
|
|
if (!lbs->pwd_xml_tree)
|
|
return FALSE;
|
|
|
|
sprintf(str, "/list/user[name=%s]/password", user);
|
|
node = mxml_find_node(lbs->pwd_xml_tree, str);
|
|
if (node == NULL)
|
|
return FALSE;
|
|
|
|
mxml_replace_node_value(node, new_pwd);
|
|
|
|
if (get_password_file(lbs, file_name, sizeof(file_name)))
|
|
mxml_write_tree(file_name, lbs->pwd_xml_tree);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*---- common function entry points --------------------------------*/
|
|
|
|
int auth_verify_password(LOGBOOK *lbs, const char *user, const char *password, char *error_str, int error_size)
|
|
{
|
|
char str[256];
|
|
|
|
error_str[0] = 0;
|
|
getcfg(lbs->name, "Authentication", str, sizeof(str));
|
|
if (stricmp(str, "Kerberos") == 0)
|
|
return auth_verify_password_krb5(lbs, user, password, error_str, error_size);
|
|
|
|
return auth_verify_password_file(lbs, user, password, error_str, error_size);
|
|
}
|
|
|
|
int auth_change_password(LOGBOOK *lbs, const char *user, const char *old_pwd, const char *new_pwd, char *error_str, int error_size)
|
|
{
|
|
char str[256];
|
|
|
|
error_str[0] = 0;
|
|
getcfg(lbs->name, "Authentication", str, sizeof(str));
|
|
if (stricmp(str, "Kerberos") == 0)
|
|
return auth_change_password_krb5(lbs, user, old_pwd, new_pwd, error_str, error_size);
|
|
|
|
return auth_change_password_file(lbs, user, old_pwd, new_pwd, error_str, error_size);
|
|
} |