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/* Copyright (c) 2005-2018 Dovecot authors, see the included COPYING file */
#include "auth-common.h"
#include "array.h"
#include "str.h"
#include "strescape.h"
#include "ostream.h"
#include "auth-request.h"
#include "auth-fields.h"
struct auth_fields {
pool_t pool;
ARRAY_TYPE(auth_field) fields, snapshot_fields;
unsigned int snapshot_idx;
bool snapshotted;
};
struct auth_fields *auth_fields_init(pool_t pool)
{
struct auth_fields *fields;
fields = p_new(pool, struct auth_fields, 1);
fields->pool = pool;
return fields;
}
static void auth_fields_snapshot_preserve(struct auth_fields *fields)
{
if (!fields->snapshotted || array_is_created(&fields->snapshot_fields))
return;
p_array_init(&fields->snapshot_fields, fields->pool,
array_count(&fields->fields));
array_append_array(&fields->snapshot_fields, &fields->fields);
}
static bool
auth_fields_find_idx(struct auth_fields *fields, const char *key,
unsigned int *idx_r)
{
const struct auth_field *f;
unsigned int i, count;
if (!array_is_created(&fields->fields))
return FALSE;
f = array_get(&fields->fields, &count);
for (i = 0; i < count; i++) {
if (strcmp(f[i].key, key) == 0) {
*idx_r = i;
return TRUE;
}
}
return FALSE;
}
void auth_fields_add(struct auth_fields *fields,
const char *key, const char *value,
enum auth_field_flags flags)
{
struct auth_field *field;
unsigned int idx;
i_assert(*key != '\0');
i_assert(strchr(key, '\t') == NULL &&
strchr(key, '\n') == NULL);
if (!auth_fields_find_idx(fields, key, &idx)) {
if (!array_is_created(&fields->fields))
p_array_init(&fields->fields, fields->pool, 16);
field = array_append_space(&fields->fields);
field->key = p_strdup(fields->pool, key);
} else {
auth_fields_snapshot_preserve(fields);
field = array_idx_modifiable(&fields->fields, idx);
}
field->value = p_strdup_empty(fields->pool, value);
field->flags = flags | AUTH_FIELD_FLAG_CHANGED;
}
void auth_fields_remove(struct auth_fields *fields, const char *key)
{
unsigned int idx;
if (auth_fields_find_idx(fields, key, &idx)) {
auth_fields_snapshot_preserve(fields);
array_delete(&fields->fields, idx, 1);
}
}
const char *auth_fields_find(struct auth_fields *fields, const char *key)
{
const struct auth_field *field;
unsigned int idx;
if (!auth_fields_find_idx(fields, key, &idx))
return NULL;
field = array_idx(&fields->fields, idx);
return field->value == NULL ? "" : field->value;
}
bool auth_fields_exists(struct auth_fields *fields, const char *key)
{
return auth_fields_find(fields, key) != NULL;
}
void auth_fields_reset(struct auth_fields *fields)
{
if (array_is_created(&fields->fields)) {
auth_fields_snapshot_preserve(fields);
array_clear(&fields->fields);
}
}
void auth_fields_import_prefixed(struct auth_fields *fields, const char *prefix,
const char *str, enum auth_field_flags flags)
{
T_BEGIN {
const char *const *arg = t_strsplit_tabescaped(str);
const char *key, *value;
for (; *arg != NULL; arg++) {
value = strchr(*arg, '=');
if (value == NULL) {
key = *arg;
value = NULL;
} else {
key = t_strdup_until(*arg, value++);
if (*prefix != '\0')
key = t_strconcat(prefix, key, NULL);
}
auth_fields_add(fields, key, value, flags);
}
} T_END;
}
void auth_fields_import(struct auth_fields *fields, const char *str,
enum auth_field_flags flags)
{
auth_fields_import_prefixed(fields, "", str, flags);
}
const ARRAY_TYPE(auth_field) *auth_fields_export(struct auth_fields *fields)
{
if (!array_is_created(&fields->fields))
p_array_init(&fields->fields, fields->pool, 1);
return &fields->fields;
}
void auth_fields_append(struct auth_fields *fields, string_t *dest,
enum auth_field_flags flags_mask,
enum auth_field_flags flags_result)
{
const struct auth_field *f;
unsigned int i, count;
bool first = TRUE;
if (!array_is_created(&fields->fields))
return;
f = array_get(&fields->fields, &count);
for (i = 0; i < count; i++) {
if ((f[i].flags & flags_mask) != flags_result)
continue;
if (first)
first = FALSE;
else
str_append_c(dest, '\t');
str_append(dest, f[i].key);
if (f[i].value != NULL) {
str_append_c(dest, '=');
str_append_tabescaped(dest, f[i].value);
}
}
}
bool auth_fields_is_empty(struct auth_fields *fields)
{
return fields == NULL || !array_is_created(&fields->fields) ||
array_count(&fields->fields) == 0;
}
void auth_fields_booleanize(struct auth_fields *fields, const char *key)
{
struct auth_field *field;
unsigned int idx;
if (auth_fields_find_idx(fields, key, &idx)) {
field = array_idx_modifiable(&fields->fields, idx);
field->value = NULL;
}
}
void auth_fields_snapshot(struct auth_fields *fields)
{
struct auth_field *field;
fields->snapshotted = TRUE;
if (!array_is_created(&fields->fields))
return;
if (!array_is_created(&fields->snapshot_fields)) {
/* try to avoid creating this array */
fields->snapshot_idx = array_count(&fields->fields);
} else {
array_clear(&fields->snapshot_fields);
array_append_array(&fields->snapshot_fields, &fields->fields);
}
array_foreach_modifiable(&fields->fields, field)
field->flags &= ENUM_NEGATE(AUTH_FIELD_FLAG_CHANGED);
}
void auth_fields_rollback(struct auth_fields *fields)
{
if (array_is_created(&fields->snapshot_fields)) {
array_clear(&fields->fields);
array_append_array(&fields->fields, &fields->snapshot_fields);
} else if (array_is_created(&fields->fields)) {
array_delete(&fields->fields, fields->snapshot_idx,
array_count(&fields->fields) -
fields->snapshot_idx);
}
}
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