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/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "buffer.h"
#include "hex-binary.h"
#include "randgen.h"
#include "mail-user.h"
#include "mail-storage.h"
#include "mailbox-list-iter.h"
#include "imap-urlauth-private.h"
#include "imap-urlauth-backend.h"
#define IMAP_URLAUTH_KEY MAILBOX_ATTRIBUTE_PREFIX_DOVECOT"imap-urlauth"
static int
imap_urlauth_backend_trans_set_mailbox_key(struct mailbox *box,
unsigned char mailbox_key_r[IMAP_URLAUTH_KEY_LEN],
const char **client_error_r,
enum mail_error *error_code_r)
{
struct mail_attribute_value urlauth_key;
const char *mailbox_key_hex = NULL;
int ret;
if (mailbox_open(box) < 0) {
*client_error_r = mailbox_get_last_error(box, error_code_r);
return -1;
}
struct mailbox_transaction_context *t =
mailbox_transaction_begin(box,
MAILBOX_TRANSACTION_FLAG_EXTERNAL,
__func__);
/* create new key */
random_fill(mailbox_key_r, IMAP_URLAUTH_KEY_LEN);
mailbox_key_hex = binary_to_hex(mailbox_key_r,
IMAP_URLAUTH_KEY_LEN);
i_zero(&urlauth_key);
urlauth_key.value = mailbox_key_hex;
ret = mailbox_attribute_set(t, MAIL_ATTRIBUTE_TYPE_PRIVATE,
IMAP_URLAUTH_KEY, &urlauth_key);
if (mailbox_transaction_commit(&t) < 0) {
*client_error_r = mailbox_get_last_error(box, error_code_r);
ret = -1;
}
return ret;
}
static int
imap_urlauth_backend_trans_get_mailbox_key(struct mailbox *box,
bool create,
unsigned char mailbox_key_r[IMAP_URLAUTH_KEY_LEN],
const char **client_error_r,
enum mail_error *error_code_r)
{
struct mail_user *user = mail_storage_get_user(mailbox_get_storage(box));
struct mail_attribute_value urlauth_key;
const char *mailbox_key_hex = NULL;
buffer_t key_buf;
int ret;
*client_error_r = "Internal server error";
*error_code_r = MAIL_ERROR_TEMP;
ret = mailbox_attribute_get(box, MAIL_ATTRIBUTE_TYPE_PRIVATE,
IMAP_URLAUTH_KEY, &urlauth_key);
if (ret < 0)
return -1;
e_debug(user->event, "imap-urlauth: %skey found for mailbox %s",
(ret > 0 ? "" : "no "), mailbox_get_vname(box));
if (ret == 0) {
if (!create)
return 0;
ret = imap_urlauth_backend_trans_set_mailbox_key(box,
mailbox_key_r,
client_error_r,
error_code_r);
if (ret < 0)
return -1;
e_debug(user->event, "imap-urlauth: created key for mailbox %s",
mailbox_get_vname(box));
} else {
/* read existing key */
buffer_create_from_data(&key_buf, mailbox_key_r,
IMAP_URLAUTH_KEY_LEN);
mailbox_key_hex = urlauth_key.value;
if (strlen(mailbox_key_hex) != 2*IMAP_URLAUTH_KEY_LEN ||
hex_to_binary(mailbox_key_hex, &key_buf) < 0 ||
key_buf.used != IMAP_URLAUTH_KEY_LEN) {
i_error("imap-urlauth: key found for mailbox %s is invalid",
mailbox_get_vname(box));
return -1;
}
}
return 1;
}
int imap_urlauth_backend_get_mailbox_key(struct mailbox *box, bool create,
unsigned char mailbox_key_r[IMAP_URLAUTH_KEY_LEN],
const char **client_error_r,
enum mail_error *error_code_r)
{
int ret;
ret = imap_urlauth_backend_trans_get_mailbox_key(box, create,
mailbox_key_r,
client_error_r,
error_code_r);
return ret;
}
int imap_urlauth_backend_reset_mailbox_key(struct mailbox *box)
{
struct mailbox_transaction_context *t;
int ret;
t = mailbox_transaction_begin(box, MAILBOX_TRANSACTION_FLAG_EXTERNAL,
__func__);
ret = mailbox_attribute_unset(t, MAIL_ATTRIBUTE_TYPE_PRIVATE,
IMAP_URLAUTH_KEY);
if (mailbox_transaction_commit(&t) < 0)
ret = -1;
return ret;
}
static int imap_urlauth_backend_mailbox_reset_key(struct mailbox *box)
{
const char *errstr;
enum mail_error error;
if (mailbox_open(box) < 0) {
errstr = mailbox_get_last_internal_error(box, &error);
if (error == MAIL_ERROR_NOTFOUND || error == MAIL_ERROR_PERM)
return 0;
i_error("urlauth key reset: Couldn't open mailbox %s: %s",
mailbox_get_vname(box), errstr);
return -1;
}
return imap_urlauth_backend_reset_mailbox_key(box);
}
int imap_urlauth_backend_reset_all_keys(struct mail_user *user)
{
const char *const patterns[] = { "*", NULL };
struct mailbox_list_iterate_context *iter;
const struct mailbox_info *info;
struct mailbox *box;
int ret = 0;
iter = mailbox_list_iter_init_namespaces(user->namespaces, patterns,
MAIL_NAMESPACE_TYPE_MASK_ALL,
MAILBOX_LIST_ITER_NO_AUTO_BOXES |
MAILBOX_LIST_ITER_SKIP_ALIASES |
MAILBOX_LIST_ITER_RETURN_NO_FLAGS);
while ((info = mailbox_list_iter_next(iter)) != NULL) {
box = mailbox_alloc(info->ns->list, info->vname, 0);
if (imap_urlauth_backend_mailbox_reset_key(box) < 0)
ret = -1;
mailbox_free(&box);
}
if (mailbox_list_iter_deinit(&iter) < 0) {
i_error("urlauth key reset: Couldn't iterate mailboxes: %s",
mailbox_list_get_last_internal_error(user->namespaces->list, NULL));
ret = -1;
}
return ret;
}
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