lighttpd 1.4.x https://www.lighttpd.net/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

1533 lines
52 KiB

#include "first.h"
#include <stdlib.h>
#include <string.h>
#include "sys-crypto-md.h" /* USE_LIB_CRYPTO */
#include "base.h"
#include "plugin.h"
#include "plugin_config.h"
#include "http_auth.h"
#include "http_header.h"
#include "log.h"
#include "safe_memclear.h"
#include "algo_splaytree.h"
/**
* auth framework
*/
typedef struct {
splay_tree *sptree; /* data in nodes of tree are (http_auth_cache_entry *)*/
time_t max_age;
} http_auth_cache;
typedef struct {
const http_auth_backend_t *auth_backend;
const array *auth_require;
http_auth_cache *auth_cache;
unsigned int auth_extern_authn;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config defaults;
plugin_config conf;
} plugin_data;
typedef struct {
const struct http_auth_require_t *require;
time_t ctime;
int dalgo;
uint32_t dlen;
uint32_t ulen;
char *username;
char *pwdigest;
} http_auth_cache_entry;
static http_auth_cache_entry *
http_auth_cache_entry_init (const struct http_auth_require_t * const require, const int dalgo, const char *username, const uint32_t ulen, const char *pw, const uint32_t pwlen)
{
/*(similar to buffer_copy_string_len() for each element,
* but allocate exact lengths in single chunk of memory
* for cache to avoid wasting space and for memory locality)*/
/* http_auth_require_t is stored instead of copying realm
*(store pointer to http_auth_require_t, which is persistent
* and will be different for each realm + permissions combo)*/
http_auth_cache_entry * const ae =
malloc(sizeof(http_auth_cache_entry) + ulen + pwlen);
force_assert(ae);
ae->require = require;
ae->ctime = log_monotonic_secs;
ae->dalgo = dalgo;
ae->ulen = ulen;
ae->dlen = pwlen;
ae->username = (char *)(ae + 1);
ae->pwdigest = ae->username + ulen;
memcpy(ae->username, username, ulen);
memcpy(ae->pwdigest, pw, pwlen);
return ae;
}
static void
http_auth_cache_entry_free (void *data)
{
http_auth_cache_entry * const ae = data;
safe_memclear(ae->pwdigest, ae->dlen);
free(ae);
}
static void
http_auth_cache_free (http_auth_cache *ac)
{
splay_tree *sptree = ac->sptree;
while (sptree) {
http_auth_cache_entry_free(sptree->data);
sptree = splaytree_delete(sptree, sptree->key);
}
free(ac);
}
static http_auth_cache *
http_auth_cache_init (const array *opts)
{
http_auth_cache *ac = malloc(sizeof(http_auth_cache));
force_assert(ac);
ac->sptree = NULL;
ac->max_age = 600; /* 10 mins */
for (uint32_t i = 0, used = opts->used; i < used; ++i) {
data_unset *du = opts->data[i];
if (buffer_is_equal_string(&du->key, CONST_STR_LEN("max-age")))
ac->max_age = (time_t)config_plugin_value_to_int32(du, ac->max_age);
}
return ac;
}
static int
http_auth_cache_hash (const struct http_auth_require_t * const require, const char *username, const uint32_t ulen)
{
uint32_t h = /*(hash pointer value, which includes realm and permissions)*/
djbhash((char *)(intptr_t)require, sizeof(intptr_t), DJBHASH_INIT);
h = djbhash(username, ulen, h);
/* strip highest bit of hash value for splaytree (see splaytree_djbhash())*/
return (int32_t)(h & ~(((uint32_t)1) << 31));
}
static http_auth_cache_entry *
http_auth_cache_query (splay_tree ** const sptree, const int ndx)
{
*sptree = splaytree_splay(*sptree, ndx);
return (*sptree && (*sptree)->key == ndx) ? (*sptree)->data : NULL;
}
static void
http_auth_cache_insert (splay_tree ** const sptree, const int ndx, void * const data, void(data_free_fn)(void *))
{
/*(not necessary to re-splay (with current usage) since single-threaded
* and splaytree has not been modified since http_auth_cache_query())*/
/* *sptree = splaytree_splay(*sptree, ndx); */
if (NULL == *sptree || (*sptree)->key != ndx)
*sptree = splaytree_insert(*sptree, ndx, data);
else { /* collision; replace old entry */
data_free_fn((*sptree)->data);
(*sptree)->data = data;
}
}
/* walk though cache, collect expired ids, and remove them in a second loop */
static void
mod_auth_tag_old_entries (splay_tree * const t, int * const keys, int * const ndx, const time_t max_age, const time_t cur_ts)
{
if (*ndx == 8192) return; /*(must match num array entries in keys[])*/
if (t->left)
mod_auth_tag_old_entries(t->left, keys, ndx, max_age, cur_ts);
if (t->right)
mod_auth_tag_old_entries(t->right, keys, ndx, max_age, cur_ts);
if (*ndx == 8192) return; /*(must match num array entries in keys[])*/
const http_auth_cache_entry * const ae = t->data;
if (cur_ts - ae->ctime > max_age)
keys[(*ndx)++] = t->key;
}
__attribute_noinline__
static void
mod_auth_periodic_cleanup(splay_tree **sptree_ptr, const time_t max_age, const time_t cur_ts)
{
splay_tree *sptree = *sptree_ptr;
int max_ndx, i;
int keys[8192]; /* 32k size on stack */
do {
if (!sptree) break;
max_ndx = 0;
mod_auth_tag_old_entries(sptree, keys, &max_ndx, max_age, cur_ts);
for (i = 0; i < max_ndx; ++i) {
int ndx = keys[i];
sptree = splaytree_splay(sptree, ndx);
if (sptree && sptree->key == ndx) {
http_auth_cache_entry_free(sptree->data);
sptree = splaytree_delete(sptree, ndx);
}
}
} while (max_ndx == sizeof(keys)/sizeof(int));
*sptree_ptr = sptree;
}
TRIGGER_FUNC(mod_auth_periodic)
{
const plugin_data * const p = p_d;
const time_t cur_ts = log_monotonic_secs;
if (cur_ts & 0x7) return HANDLER_GO_ON; /*(continue once each 8 sec)*/
UNUSED(srv);
/* future: might construct array of (http_auth_cache *) at startup
* to avoid the need to search for them here */
/* (init i to 0 if global context; to 1 to skip empty global context) */
if (NULL == p->cvlist) return HANDLER_GO_ON;
for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) {
const config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; cpv->k_id != -1; ++cpv) {
if (cpv->k_id != 3) continue; /* k_id == 3 for auth.cache */
if (cpv->vtype != T_CONFIG_LOCAL) continue;
http_auth_cache *ac = cpv->v.v;
mod_auth_periodic_cleanup(&ac->sptree, ac->max_age, cur_ts);
}
}
return HANDLER_GO_ON;
}
static handler_t mod_auth_check_basic(request_st *r, void *p_d, const struct http_auth_require_t *require, const struct http_auth_backend_t *backend);
static handler_t mod_auth_check_digest(request_st *r, void *p_d, const struct http_auth_require_t *require, const struct http_auth_backend_t *backend);
static handler_t mod_auth_check_extern(request_st *r, void *p_d, const struct http_auth_require_t *require, const struct http_auth_backend_t *backend);
INIT_FUNC(mod_auth_init) {
static http_auth_scheme_t http_auth_scheme_basic = { "basic", mod_auth_check_basic, NULL };
static http_auth_scheme_t http_auth_scheme_digest = { "digest", mod_auth_check_digest, NULL };
static const http_auth_scheme_t http_auth_scheme_extern = { "extern", mod_auth_check_extern, NULL };
plugin_data *p = calloc(1, sizeof(*p));
force_assert(p);
/* register http_auth_scheme_* */
http_auth_scheme_basic.p_d = p;
http_auth_scheme_set(&http_auth_scheme_basic);
http_auth_scheme_digest.p_d = p;
http_auth_scheme_set(&http_auth_scheme_digest);
http_auth_scheme_set(&http_auth_scheme_extern);
return p;
}
FREE_FUNC(mod_auth_free) {
plugin_data * const p = p_d;
if (NULL == p->cvlist) return;
/* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; -1 != cpv->k_id; ++cpv) {
if (cpv->vtype != T_CONFIG_LOCAL || NULL == cpv->v.v) continue;
switch (cpv->k_id) {
case 1: /* auth.require */
array_free(cpv->v.v);
break;
case 3: /* auth.cache */
http_auth_cache_free(cpv->v.v);
break;
default:
break;
}
}
}
}
/* data type for mod_auth structured data
* (parsed from auth.require array of strings) */
typedef struct {
DATA_UNSET;
http_auth_require_t *require;
} data_auth;
static void data_auth_free(data_unset *d)
{
data_auth * const dauth = (data_auth *)d;
free(dauth->key.ptr);
http_auth_require_free(dauth->require);
free(dauth);
}
static data_auth *data_auth_init(void)
{
static const struct data_methods fn = {
NULL, /* copy must not be called on this data */
data_auth_free,
NULL, /* insert_dup must not be called on this data */
};
data_auth * const dauth = calloc(1, sizeof(*dauth));
force_assert(NULL != dauth);
dauth->type = TYPE_OTHER;
dauth->fn = &fn;
dauth->require = http_auth_require_init();
return dauth;
}
static int mod_auth_algorithm_parse(http_auth_info_t *ai, const char *s) {
size_t len;
if (NULL == s) {
ai->dalgo = HTTP_AUTH_DIGEST_MD5;
ai->dlen = HTTP_AUTH_DIGEST_MD5_BINLEN;
return 1;
}
len = strlen(s);
if (len > 5
&& (s[len-5] ) == '-'
&& (s[len-4] | 0x20) == 's'
&& (s[len-3] | 0x20) == 'e'
&& (s[len-2] | 0x20) == 's'
&& (s[len-1] | 0x20) == 's') {
ai->dalgo = HTTP_AUTH_DIGEST_SESS;
len -= 5;
}
else {
ai->dalgo = HTTP_AUTH_DIGEST_NONE;
}
if (3 == len
&& 'm' == (s[0] | 0x20)
&& 'd' == (s[1] | 0x20)
&& '5' == (s[2] )) {
ai->dalgo |= HTTP_AUTH_DIGEST_MD5;
ai->dlen = HTTP_AUTH_DIGEST_MD5_BINLEN;
return 1;
}
#ifdef USE_LIB_CRYPTO
else if (len >= 7
&& 's' == (s[0] | 0x20)
&& 'h' == (s[1] | 0x20)
&& 'a' == (s[2] | 0x20)
&& '-' == (s[3] )) {
if (len == 7 && s[4] == '2' && s[5] == '5' && s[6] == '6') {
ai->dalgo |= HTTP_AUTH_DIGEST_SHA256;
ai->dlen = HTTP_AUTH_DIGEST_SHA256_BINLEN;
return 1;
}
#ifdef USE_LIB_CRYPTO_SHA512_256
if (len == 11 && 0 == memcmp(s+4, "512-256", 7)) {
ai->dalgo |= HTTP_AUTH_DIGEST_SHA512_256;
ai->dlen = HTTP_AUTH_DIGEST_SHA512_256_BINLEN;
return 1;
}
#endif
}
#endif
return 0; /*(error)*/
}
static int mod_auth_algorithms_parse(int *algorithm, buffer *algos) {
for (char *s = algos->ptr, *p; s; s = p ? p+1 : NULL) {
http_auth_info_t ai;
int rc;
p = strchr(s, '|');
if (p) *p = '\0';
rc = mod_auth_algorithm_parse(&ai, s);
if (p) *p = '|';
if (!rc) return 0;
*algorithm |= ai.dalgo;
}
return 1;
}
static int mod_auth_require_parse (http_auth_require_t * const require, const buffer *b, log_error_st *errh)
{
/* user=name1|user=name2|group=name3|host=name4 */
const char *str = b->ptr;
const char *p;
if (buffer_is_equal_string(b, CONST_STR_LEN("valid-user"))) {
require->valid_user = 1;
return 1; /* success */
}
do {
const char *eq;
size_t len;
p = strchr(str, '|');
len = NULL != p ? (size_t)(p - str) : strlen(str);
eq = memchr(str, '=', len);
if (NULL == eq) {
log_error(errh, __FILE__, __LINE__,
"error parsing auth.require 'require' field: missing '=' "
"(expecting \"valid-user\" or \"user=a|user=b|group=g|host=h\"). "
"error value: %s error near: %s", b->ptr, str);
return 0;
}
if (eq[1] == '|' || eq[1] == '\0') {
log_error(errh, __FILE__, __LINE__,
"error parsing auth.require 'require' field: "
"missing token after '=' "
"(expecting \"valid-user\" or \"user=a|user=b|group=g|host=h\"). "
"error value: %s error near: %s", b->ptr, str);
return 0;
}
switch ((int)(eq - str)) {
case 4:
if (0 == memcmp(str, CONST_STR_LEN("user"))) {
/*("user=" is 5)*/
array_set_key_value(&require->user, str+5, len-5, CONST_STR_LEN(""));
continue;
}
else if (0 == memcmp(str, CONST_STR_LEN("host"))) {
/*("host=" is 5)*/
array_set_key_value(&require->host, str+5, len-5, CONST_STR_LEN(""));
log_error(errh, __FILE__, __LINE__,
"warning parsing auth.require 'require' field: "
"'host' not implemented; field value: %s", b->ptr);
continue;
}
break; /* to error */
case 5:
if (0 == memcmp(str, CONST_STR_LEN("group"))) {
/*("group=" is 6)*/
array_set_key_value(&require->group, str+6, len-6, CONST_STR_LEN(""));
#if 0/*(supported by mod_authn_ldap, but not all other backends)*/
log_error(errh, __FILE__, __LINE__,
"warning parsing auth.require 'require' field: "
"'group' not implemented; field value: %s", b->ptr);
#endif
continue;
}
break; /* to error */
case 10:
if (0 == memcmp(str, CONST_STR_LEN("valid-user"))) {
log_error(errh, __FILE__, __LINE__,
"error parsing auth.require 'require' field: "
"valid user can not be combined with other require rules "
"(expecting \"valid-user\" or "
"\"user=a|user=b|group=g|host=h\"). error value: %s", b->ptr);
return 0;
}
break; /* to error */
default:
break; /* to error */
}
log_error(errh, __FILE__, __LINE__,
"error parsing auth.require 'require' field: "
"invalid/unsupported token "
"(expecting \"valid-user\" or \"user=a|user=b|group=g|host=h\"). "
"error value: %s error near: %s", b->ptr, str);
return 0;
} while (p && *((str = p+1)));
return 1; /* success */
}
static handler_t mod_auth_require_parse_array(const array *value, array * const auth_require, log_error_st *errh)
{
for (uint32_t n = 0; n < value->used; ++n) {
size_t m;
data_array *da_file = (data_array *)value->data[n];
const buffer *method = NULL, *realm = NULL, *require = NULL;
const buffer *nonce_secret = NULL;
const http_auth_scheme_t *auth_scheme;
buffer *algos = NULL;
int algorithm = HTTP_AUTH_DIGEST_SESS;
if (!array_is_kvstring(&da_file->value)) {
log_error(errh, __FILE__, __LINE__,
"unexpected value for auth.require; expected "
"auth.require = ( \"urlpath\" => ( \"option\" => \"value\" ) )");
return HANDLER_ERROR;
}
for (m = 0; m < da_file->value.used; m++) {
if (da_file->value.data[m]->type == TYPE_STRING) {
data_string *ds = (data_string *)da_file->value.data[m];
if (buffer_is_equal_string(&ds->key, CONST_STR_LEN("method"))) {
method = &ds->value;
} else if (buffer_is_equal_string(&ds->key, CONST_STR_LEN("realm"))) {
realm = &ds->value;
} else if (buffer_is_equal_string(&ds->key, CONST_STR_LEN("require"))) {
require = &ds->value;
} else if (buffer_is_equal_string(&ds->key, CONST_STR_LEN("algorithm"))) {
algos = &ds->value;
} else if (buffer_is_equal_string(&ds->key, CONST_STR_LEN("nonce_secret"))
|| buffer_is_equal_string(&ds->key, CONST_STR_LEN("nonce-secret"))) {
nonce_secret = &ds->value;
} else {
log_error(errh, __FILE__, __LINE__,
"the field is unknown in: "
"auth.require = ( \"...\" => ( ..., -> \"%s\" <- => \"...\" ) )",
da_file->value.data[m]->key.ptr);
return HANDLER_ERROR;
}
} else {
log_error(errh, __FILE__, __LINE__,
"a string was expected for: "
"auth.require = ( \"...\" => ( ..., -> \"%s\" <- => \"...\" ) )",
da_file->value.data[m]->key.ptr);
return HANDLER_ERROR;
}
}
if (buffer_string_is_empty(method)) {
log_error(errh, __FILE__, __LINE__,
"the method field is missing or blank in: "
"auth.require = ( \"...\" => ( ..., \"method\" => \"...\" ) )");
return HANDLER_ERROR;
} else {
auth_scheme = http_auth_scheme_get(method);
if (NULL == auth_scheme) {
log_error(errh, __FILE__, __LINE__,
"unknown method %s (e.g. \"basic\", \"digest\" or \"extern\") in "
"auth.require = ( \"...\" => ( ..., \"method\" => \"...\") )", method->ptr);
return HANDLER_ERROR;
}
}
if (buffer_is_empty(realm)) {
log_error(errh, __FILE__, __LINE__,
"the realm field is missing in: "
"auth.require = ( \"...\" => ( ..., \"realm\" => \"...\" ) )");
return HANDLER_ERROR;
}
if (buffer_string_is_empty(require)) {
log_error(errh, __FILE__, __LINE__,
"the require field is missing or blank in: "
"auth.require = ( \"...\" => ( ..., \"require\" => \"...\" ) )");
return HANDLER_ERROR;
}
if (buffer_string_is_empty(algos)) {
algorithm |= HTTP_AUTH_DIGEST_MD5;
} else if (!mod_auth_algorithms_parse(&algorithm, algos)) {
log_error(errh, __FILE__, __LINE__,
"invalid algorithm in: "
"auth.require = ( \"...\" => ( ..., \"algorithm\" => \"...\" ) )");
return HANDLER_ERROR;
}
if (require) { /*(always true at this point)*/
data_auth * const dauth = data_auth_init();
buffer_copy_buffer(&dauth->key, &da_file->key);
dauth->require->scheme = auth_scheme;
dauth->require->algorithm = algorithm;
dauth->require->realm = realm;
dauth->require->nonce_secret = nonce_secret; /*(NULL is ok)*/
if (!mod_auth_require_parse(dauth->require, require, errh)) {
dauth->fn->free((data_unset *)dauth);
return HANDLER_ERROR;
}
array_insert_unique(auth_require, (data_unset *)dauth);
}
}
return HANDLER_GO_ON;
}
static void mod_auth_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) {
switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */
case 0: /* auth.backend */
if (cpv->vtype == T_CONFIG_LOCAL)
pconf->auth_backend = cpv->v.v;
break;
case 1: /* auth.require */
if (cpv->vtype == T_CONFIG_LOCAL)
pconf->auth_require = cpv->v.v;
break;
case 2: /* auth.extern-authn */
pconf->auth_extern_authn = cpv->v.u;
break;
case 3: /* auth.cache */
if (cpv->vtype == T_CONFIG_LOCAL)
pconf->auth_cache = cpv->v.v;
break;
default:/* should not happen */
return;
}
}
static void mod_auth_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) {
do {
mod_auth_merge_config_cpv(pconf, cpv);
} while ((++cpv)->k_id != -1);
}
static void mod_auth_patch_config(request_st * const r, plugin_data * const p) {
p->conf = p->defaults; /* copy small struct instead of memcpy() */
/*memcpy(&p->conf, &p->defaults, sizeof(plugin_config));*/
for (int i = 1, used = p->nconfig; i < used; ++i) {
if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id))
mod_auth_merge_config(&p->conf, p->cvlist + p->cvlist[i].v.u2[0]);
}
}
SETDEFAULTS_FUNC(mod_auth_set_defaults) {
static const config_plugin_keys_t cpk[] = {
{ CONST_STR_LEN("auth.backend"),
T_CONFIG_STRING,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("auth.require"),
T_CONFIG_ARRAY_KVARRAY,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("auth.extern-authn"),
T_CONFIG_BOOL,
T_CONFIG_SCOPE_CONNECTION }
,{ CONST_STR_LEN("auth.cache"),
T_CONFIG_ARRAY,
T_CONFIG_SCOPE_CONNECTION }
,{ NULL, 0,
T_CONFIG_UNSET,
T_CONFIG_SCOPE_UNSET }
};
plugin_data * const p = p_d;
if (!config_plugin_values_init(srv, p, cpk, "mod_auth"))
return HANDLER_ERROR;
/* process and validate config directives
* (init i to 0 if global context; to 1 to skip empty global context) */
for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) {
config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0];
for (; -1 != cpv->k_id; ++cpv) {
switch (cpv->k_id) {
case 0: /* auth.backend */
if (!buffer_string_is_empty(cpv->v.b)) {
const http_auth_backend_t * const auth_backend =
http_auth_backend_get(cpv->v.b);
if (NULL == auth_backend) {
log_error(srv->errh, __FILE__, __LINE__,
"auth.backend not supported: %s", cpv->v.b->ptr);
return HANDLER_ERROR;
}
*(const http_auth_backend_t **)&cpv->v.v = auth_backend;
cpv->vtype = T_CONFIG_LOCAL;
}
break;
case 1: /* auth.require */
{
array * const a = array_init(4);
if (HANDLER_GO_ON !=
mod_auth_require_parse_array(cpv->v.a, a, srv->errh)) {
array_free(a);
return HANDLER_ERROR;
}
cpv->v.a = a;
cpv->vtype = T_CONFIG_LOCAL;
}
break;
case 2: /* auth.extern-authn */
break;
case 3: /* auth.cache */
cpv->v.v = http_auth_cache_init(cpv->v.a);
cpv->vtype = T_CONFIG_LOCAL;
break;
default:/* should not happen */
break;
}
}
}
/* initialize p->defaults from global config context */
if (p->nconfig > 0 && p->cvlist->v.u2[1]) {
const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0];
if (-1 != cpv->k_id)
mod_auth_merge_config(&p->defaults, cpv);
}
return HANDLER_GO_ON;
}
static handler_t mod_auth_uri_handler(request_st * const r, void *p_d) {
plugin_data *p = p_d;
data_auth *dauth;
mod_auth_patch_config(r, p);
if (p->conf.auth_require == NULL) return HANDLER_GO_ON;
/* search auth directives for first prefix match against URL path */
/* if we have a case-insensitive FS we have to lower-case the URI here too */
dauth = (!r->conf.force_lowercase_filenames)
? (data_auth *)array_match_key_prefix(p->conf.auth_require, &r->uri.path)
: (data_auth *)array_match_key_prefix_nc(p->conf.auth_require, &r->uri.path);
if (NULL == dauth) return HANDLER_GO_ON;
{
const http_auth_scheme_t * const scheme = dauth->require->scheme;
if (p->conf.auth_extern_authn) {
const buffer *vb = http_header_env_get(r, CONST_STR_LEN("REMOTE_USER"));
if (NULL != vb && http_auth_match_rules(dauth->require, vb->ptr, NULL, NULL)) {
return HANDLER_GO_ON;
}
}
return scheme->checkfn(r, scheme->p_d, dauth->require, p->conf.auth_backend);
}
}
int mod_auth_plugin_init(plugin *p);
int mod_auth_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = "auth";
p->init = mod_auth_init;
p->set_defaults = mod_auth_set_defaults;
p->handle_trigger = mod_auth_periodic;
p->handle_uri_clean = mod_auth_uri_handler;
p->cleanup = mod_auth_free;
return 0;
}
/*
* auth schemes (basic, digest, extern)
*