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/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "array.h"
#include "safe-memset.h"
#include "dsasl-client-private.h"
static int init_refcount = 0;
static ARRAY(const struct dsasl_client_mech *) dsasl_mechanisms = ARRAY_INIT;
static const struct dsasl_client_mech *
dsasl_client_mech_find_idx(const char *name, unsigned int *idx_r)
{
const struct dsasl_client_mech *const *mechp;
array_foreach(&dsasl_mechanisms, mechp) {
if (strcasecmp((*mechp)->name, name) == 0) {
*idx_r = array_foreach_idx(&dsasl_mechanisms, mechp);
return *mechp;
}
}
return NULL;
}
const struct dsasl_client_mech *dsasl_client_mech_find(const char *name)
{
unsigned int idx;
return dsasl_client_mech_find_idx(name, &idx);
}
const char *dsasl_client_mech_get_name(const struct dsasl_client_mech *mech)
{
return mech->name;
}
void dsasl_client_mech_register(const struct dsasl_client_mech *mech)
{
unsigned int idx;
if (dsasl_client_mech_find_idx(mech->name, &idx) != NULL) {
/* allow plugins to override the default mechanisms */
array_delete(&dsasl_mechanisms, idx, 1);
}
array_push_back(&dsasl_mechanisms, &mech);
}
void dsasl_client_mech_unregister(const struct dsasl_client_mech *mech)
{
unsigned int idx;
if (dsasl_client_mech_find_idx(mech->name, &idx) == NULL)
i_panic("SASL mechanism not registered: %s", mech->name);
array_delete(&dsasl_mechanisms, idx, 1);
}
struct dsasl_client *dsasl_client_new(const struct dsasl_client_mech *mech,
const struct dsasl_client_settings *set)
{
struct dsasl_client *client;
pool_t pool = pool_alloconly_create("sasl client", 512);
client = p_malloc(pool, mech->struct_size);
client->pool = pool;
client->mech = mech;
client->set.authid = p_strdup(pool, set->authid);
client->set.authzid = p_strdup(pool, set->authzid);
client->password = p_strdup(pool, set->password);
client->set.password = client->password;
return client;
}
void dsasl_client_free(struct dsasl_client **_client)
{
struct dsasl_client *client = *_client;
if (client == NULL)
return;
*_client = NULL;
if (client->mech->free != NULL)
client->mech->free(client);
if (client->password != NULL)
safe_memset(client->password, 0, strlen(client->password));
pool_unref(&client->pool);
}
int dsasl_client_input(struct dsasl_client *client,
const unsigned char *input, size_t input_len,
const char **error_r)
{
if ((client->mech->flags & DSASL_MECH_SEC_ALLOW_NULS) == 0 &&
memchr(input, '\0', input_len) != NULL) {
*error_r = "Unexpected NUL in input data";
return -1;
}
return client->mech->input(client, input, input_len, error_r);
}
int dsasl_client_output(struct dsasl_client *client,
const unsigned char **output_r, size_t *output_len_r,
const char **error_r)
{
return client->mech->output(client, output_r, output_len_r, error_r);
}
int dsasl_client_set_parameter(struct dsasl_client *client,
const char *param, const char *value,
const char **error_r)
{
if (client->mech->set_parameter != NULL) {
int ret = client->mech->set_parameter(client, param,
value, error_r);
i_assert(ret >= 0 || *error_r != NULL);
return ret;
} else
return 0;
}
int dsasl_client_get_result(struct dsasl_client *client,
const char *key, const char **value_r,
const char **error_r)
{
if (client->mech->get_result != NULL) {
int ret =
client->mech->get_result(client, key, value_r, error_r);
i_assert(ret <= 0 || *value_r != NULL);
i_assert(ret >= 0 || *error_r != NULL);
return ret;
} else
return 0;
}
void dsasl_clients_init(void)
{
if (init_refcount++ > 0)
return;
i_array_init(&dsasl_mechanisms, 8);
dsasl_client_mech_register(&dsasl_client_mech_external);
dsasl_client_mech_register(&dsasl_client_mech_plain);
dsasl_client_mech_register(&dsasl_client_mech_login);
dsasl_client_mech_register(&dsasl_client_mech_oauthbearer);
dsasl_client_mech_register(&dsasl_client_mech_xoauth2);
}
void dsasl_clients_deinit(void)
{
if (--init_refcount > 0)
return;
array_free(&dsasl_mechanisms);
}
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