/***************************************************************************

 *                                  _   _ ____  _

 *  Project                     ___| | | |  _ \| |

 *                             / __| | | | |_) | |

 *                            | (__| |_| |  _ <| |___

 *                             \___|\___/|_| \_\_____|

 *

 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.

 *

 * This software is licensed as described in the file COPYING, which

 * you should have received as part of this distribution. The terms

 * are also available at https://curl.se/docs/copyright.html.

 *

 * You may opt to use, copy, modify, merge, publish, distribute and/or sell

 * copies of the Software, and permit persons to whom the Software is

 * furnished to do so, under the terms of the COPYING file.

 *

 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY

 * KIND, either express or implied.

 *

 * SPDX-License-Identifier: curl

 *

 * RFC4616 PLAIN authentication

 * Draft   LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>

 *

 ***************************************************************************/

#include "curl_setup.h"

#if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_SMTP) ||       \

  !defined(CURL_DISABLE_POP3) || \

  (!defined(CURL_DISABLE_LDAP) && defined(USE_OPENLDAP))

#include <curl/curl.h>

#include "urldata.h"

#include "vauth/vauth.h"

#include "warnless.h"

#include "strtok.h"

#include "sendf.h"

#include "curl_printf.h"

/* The last #include files should be: */

#include "curl_memory.h"

#include "memdebug.h"

/*

 * Curl_auth_create_plain_message()

 *

 * This is used to generate an already encoded PLAIN message ready

 * for sending to the recipient.

 *

 * Parameters:

 *

 * authzid [in]     - The authorization identity.

 * authcid [in]     - The authentication identity.

 * passwd  [in]     - The password.

 * out     [out]    - The result storage.

 *

 * Returns CURLE_OK on success.

 */

CURLcode Curl_auth_create_plain_message(const char *authzid,

                                        const char *authcid,

                                        const char *passwd,

                                        struct bufref *out)

{

  char *plainauth;

  size_t plainlen;

  size_t zlen;

  size_t clen;

  size_t plen;

  zlen = (authzid == NULL ? 0 : strlen(authzid));

  clen = strlen(authcid);

  plen = strlen(passwd);

  /* Compute binary message length. Check for overflows. */

  if((zlen > SIZE_T_MAX/4) || (clen > SIZE_T_MAX/4) ||

     (plen > (SIZE_T_MAX/2 - 2)))

    return CURLE_OUT_OF_MEMORY;

  plainlen = zlen + clen + plen + 2;

  plainauth = malloc(plainlen + 1);

  if(!plainauth)

    return CURLE_OUT_OF_MEMORY;

  /* Calculate the reply */

  if(zlen)

    memcpy(plainauth, authzid, zlen);

  plainauth[zlen] = '\0';

  memcpy(plainauth + zlen + 1, authcid, clen);

  plainauth[zlen + clen + 1] = '\0';

  memcpy(plainauth + zlen + clen + 2, passwd, plen);

  plainauth[plainlen] = '\0';

  Curl_bufref_set(out, plainauth, plainlen, curl_free);

  return CURLE_OK;

}

/*

 * Curl_auth_create_login_message()

 *

 * This is used to generate an already encoded LOGIN message containing the

 * user name or password ready for sending to the recipient.

 *

 * Parameters:

 *

 * valuep  [in]     - The user name or user's password.

 * out     [out]    - The result storage.

 *

 * Returns CURLE_OK on success.

 */

CURLcode Curl_auth_create_login_message(const char *valuep, struct bufref *out)

{

  Curl_bufref_set(out, valuep, strlen(valuep), NULL);

  return CURLE_OK;

}

/*

 * Curl_auth_create_external_message()

 *

 * This is used to generate an already encoded EXTERNAL message containing

 * the user name ready for sending to the recipient.

 *

 * Parameters:

 *

 * user    [in]     - The user name.

 * out     [out]    - The result storage.

 *

 * Returns CURLE_OK on success.

 */

CURLcode Curl_auth_create_external_message(const char *user,

                                           struct bufref *out)

{

  /* This is the same formatting as the login message */

  return Curl_auth_create_login_message(user, out);

}

#endif /* if no users */