callback.c

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/* callback.c --- Callback handling.
 * Copyright (C) 2002, 2003, 2004, 2005, 2006  Simon Josefsson
 *
 * This file is part of GNU SASL Library.
 *
 * GNU SASL Library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * GNU SASL Library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License License along with GNU SASL Library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "internal.h"

void
gsasl_callback_set (Gsasl * ctx, Gsasl_callback_function cb)
{
  ctx->cb = cb;
}

int
gsasl_callback (Gsasl * ctx, Gsasl_session * sctx, Gsasl_property prop)
{
  if (ctx == NULL && sctx == NULL)
    return GSASL_NO_CALLBACK;

  if (ctx == NULL)
    ctx = sctx->ctx;

  if (ctx->cb)
    return ctx->cb (ctx, sctx, prop);

#ifndef GSASL_NO_OBSOLETE
  {
    /* Call obsolete callbacks.  Remove this when the obsolete
     * callbacks are no longer supported.  */
    Gsasl_server_callback_anonymous cb_anonymous;
    Gsasl_server_callback_external cb_external;
    Gsasl_server_callback_securid cb_securid;
    Gsasl_server_callback_gssapi cb_gssapi;
    Gsasl_server_callback_validate cb_validate;
    Gsasl_server_callback_retrieve cb_retrieve;
    char buf[BUFSIZ];
    size_t buflen = BUFSIZ - 1;
    int res;

    switch (prop)
      {
      case GSASL_VALIDATE_ANONYMOUS:
        if (!sctx->anonymous_token)
          break;
        cb_anonymous = gsasl_server_callback_anonymous_get (sctx->ctx);
        if (!cb_anonymous)
          break;
        res = cb_anonymous (sctx, sctx->anonymous_token);
        return res;
        break;

      case GSASL_VALIDATE_EXTERNAL:
        cb_external = gsasl_server_callback_external_get (sctx->ctx);
        if (!cb_external)
          break;
        res = cb_external (sctx);
        return res;
        break;

      case GSASL_VALIDATE_SECURID:
        cb_securid = gsasl_server_callback_securid_get (sctx->ctx);
        if (!cb_securid)
          break;
        res = cb_securid (sctx, sctx->authid, sctx->authzid, sctx->passcode,
                          sctx->pin, buf, &buflen);
        if (buflen > 0 && buflen < BUFSIZ - 1)
          {
            buf[buflen] = '\0';
            gsasl_property_set (sctx, GSASL_SUGGESTED_PIN, buf);
          }
        return res;
        break;

      case GSASL_VALIDATE_GSSAPI:
        cb_gssapi = gsasl_server_callback_gssapi_get (sctx->ctx);
        if (!cb_gssapi)
          break;
        res = cb_gssapi (sctx, sctx->gssapi_display_name, sctx->authzid);
        return res;
        break;

      case GSASL_VALIDATE_SIMPLE:
        cb_validate = gsasl_server_callback_validate_get (sctx->ctx);
        if (!cb_validate)
          break;
        res = cb_validate (sctx, sctx->authzid, sctx->authid, sctx->password);
        return res;
        break;

      case GSASL_PASSWORD:
        cb_retrieve = gsasl_server_callback_retrieve_get (sctx->ctx);
        if (!cb_retrieve)
          break;
        res = cb_retrieve (sctx, sctx->authid, sctx->authzid,
                           sctx->hostname, buf, &buflen);
        if (res == GSASL_OK)
          gsasl_property_set_raw (sctx, GSASL_PASSWORD, buf, buflen);
        /* FIXME else if (res == GSASL_TOO_SMALL_BUFFER)... */
        return res;
        break;

      default:
        break;
      }
  }
#endif

  return GSASL_NO_CALLBACK;
}

void
gsasl_callback_hook_set (Gsasl * ctx, void *hook)
{
  ctx->application_hook = hook;
}

void *
gsasl_callback_hook_get (Gsasl * ctx)
{
  return ctx->application_hook;
}

void
gsasl_session_hook_set (Gsasl_session * sctx, void *hook)
{
  sctx->application_hook = hook;
}

void *
gsasl_session_hook_get (Gsasl_session * sctx)
{
  return sctx->application_hook;
}

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