src/auth/mech.c

	mech.c revision 4051fa1f367553cac34f74c2e332a678390bcee5
/* Copyright (c) 2002-2009 Dovecot authors, see the included COPYING file */

#include "auth-common.h"
#include "ioloop.h"
#include "mech.h"
#include "str.h"
#include "passdb.h"

#include <stdlib.h>

static struct mech_module_list *mech_modules;

void mech_register_module(const struct mech_module *module)
{
    struct mech_module_list *list;

    list = i_new(struct mech_module_list, 1);
    list->module = *module;

    list->next = mech_modules;
    mech_modules = list;
}

void mech_unregister_module(const struct mech_module *module)
{
    struct mech_module_list **pos, *list;

    for (pos = &mech_modules; *pos != NULL; pos = &(*pos)->next) {
        if (strcmp((*pos)->module.mech_name, module->mech_name) == 0) {
            list = *pos;
            *pos = (*pos)->next;
            i_free(list);
            break;
        }
    }
}

const struct mech_module *mech_module_find(const char *name)
{
    struct mech_module_list *list;

    for (list = mech_modules; list != NULL; list = list->next) {
        if (strcasecmp(list->module.mech_name, name) == 0)
            return &list->module;
    }
    return NULL;
}

void mech_generic_auth_initial(struct auth_request *request,
                   const unsigned char *data, size_t data_size)
{
    if (data == NULL) {
        request->callback(request, AUTH_CLIENT_RESULT_CONTINUE,
                  NULL, 0);
    } else {
        /* initial reply given, even if it was 0 bytes */
        request->mech->auth_continue(request, data, data_size);
    }
}

void mech_generic_auth_free(struct auth_request *request)
{
    pool_unref(&request->pool);
}

extern const struct mech_module mech_plain;
extern const struct mech_module mech_login;
extern const struct mech_module mech_apop;
extern const struct mech_module mech_cram_md5;
extern const struct mech_module mech_digest_md5;
extern const struct mech_module mech_ntlm;
extern const struct mech_module mech_otp;
extern const struct mech_module mech_skey;
extern const struct mech_module mech_rpa;
extern const struct mech_module mech_anonymous;
#ifdef HAVE_GSSAPI
extern const struct mech_module mech_gssapi;
#endif
#ifdef HAVE_GSSAPI_SPNEGO
extern const struct mech_module mech_gssapi_spnego;
#endif
extern const struct mech_module mech_winbind_ntlm;
extern const struct mech_module mech_winbind_spnego;

void mech_init(const struct auth_settings *set)
{
    mech_register_module(&mech_plain);
    mech_register_module(&mech_login);
    mech_register_module(&mech_apop);
    mech_register_module(&mech_cram_md5);
    mech_register_module(&mech_digest_md5);
    if (set->use_winbind) {
        mech_register_module(&mech_winbind_ntlm);
        mech_register_module(&mech_winbind_spnego);
    } else {
        mech_register_module(&mech_ntlm);
#if defined(HAVE_GSSAPI_SPNEGO) && defined(BUILTIN_GSSAPI)
        mech_register_module(&mech_gssapi_spnego);
#endif
    }
    mech_register_module(&mech_otp);
    mech_register_module(&mech_skey);
    mech_register_module(&mech_rpa);
    mech_register_module(&mech_anonymous);
#ifdef BUILTIN_GSSAPI
    mech_register_module(&mech_gssapi);
#endif
}

void mech_deinit(const struct auth_settings *set)
{
    mech_unregister_module(&mech_plain);
    mech_unregister_module(&mech_login);
    mech_unregister_module(&mech_apop);
    mech_unregister_module(&mech_cram_md5);
    mech_unregister_module(&mech_digest_md5);
    if (set->use_winbind) {
        mech_unregister_module(&mech_winbind_ntlm);
        mech_unregister_module(&mech_winbind_spnego);
    } else {
        mech_unregister_module(&mech_ntlm);
#if defined(HAVE_GSSAPI_SPNEGO) && defined(BUILTIN_GSSAPI)
        mech_unregister_module(&mech_gssapi_spnego);
#endif
    }
    mech_unregister_module(&mech_otp);
    mech_unregister_module(&mech_skey);
    mech_unregister_module(&mech_rpa);
    mech_unregister_module(&mech_anonymous);
#ifdef BUILTIN_GSSAPI
    mech_unregister_module(&mech_gssapi);
#endif
}