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   1 /*
   2  * Amanda, The Advanced Maryland Automatic Network Disk Archiver
   3  * Copyright (c) 1999 University of Maryland at College Park
   4  * All Rights Reserved.
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of U.M. not be used in advertising or
  11  * publicity pertaining to distribution of the software without specific,
  12  * written prior permission.  U.M. makes no representations about the
  13  * suitability of this software for any purpose.  It is provided "as is"
  14  * without express or implied warranty.
  15  *
  16  * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
  18  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  19  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  20  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  * Authors: the Amanda Development Team.  Its members are listed in a
  24  * file named AUTHORS, in the root directory of this distribution.
  25  */
  26 /*
  27  * $Id: security.c,v 1.28 2006/05/25 01:47:12 johnfranks Exp $
  28  *
  29  * Security driver interface for the Amanda backup system.
  30  */
  31
  32 #include "amanda.h"
  33 #include "arglist.h"
  34 #include "packet.h"
  35 #include "security.h"
  36
  37 #ifdef BSD_SECURITY
  38 extern const security_driver_t bsd_security_driver;
  39 #endif
  40 #ifdef KRB4_SECURITY
  41 extern const security_driver_t krb4_security_driver;
  42 #endif
  43 #ifdef KRB5_SECURITY
  44 extern const security_driver_t krb5_security_driver;
  45 #endif
  46 #ifdef RSH_SECURITY
  47 extern const security_driver_t rsh_security_driver;
  48 #endif
  49 #ifdef SSH_SECURITY
  50 extern const security_driver_t ssh_security_driver;
  51 #endif
  52 #ifdef BSDTCP_SECURITY
  53 extern const security_driver_t bsdtcp_security_driver;
  54 #endif
  55 #ifdef BSDUDP_SECURITY
  56 extern const security_driver_t bsdudp_security_driver;
  57 #endif
  58
  59 static const security_driver_t *drivers[] = {
  60 #ifdef BSD_SECURITY
  61     &bsd_security_driver,
  62 #endif
  63 #ifdef KRB4_SECURITY
  64     &krb4_security_driver,
  65 #endif
  66 #ifdef KRB5_SECURITY
  67     &krb5_security_driver,
  68 #endif
  69 #ifdef RSH_SECURITY
  70     &rsh_security_driver,
  71 #endif
  72 #ifdef SSH_SECURITY
  73     &ssh_security_driver,
  74 #endif
  75 #ifdef BSDTCP_SECURITY
  76     &bsdtcp_security_driver,
  77 #endif
  78 #ifdef BSDUDP_SECURITY
  79     &bsdudp_security_driver,
  80 #endif
  81 };
  82 #define NDRIVERS        (size_t)(sizeof(drivers) / sizeof(drivers[0]))
  83
  84 /*
  85  * Given a name of a security type, returns the driver structure
  86  */
  87 const security_driver_t *
  88 security_getdriver(
  89     const char *        name)
  90 {
  91     size_t i;
  92
  93     assert(name != NULL);
  94
  95     for (i = 0; i < NDRIVERS; i++) {
  96         if (strcasecmp(name, drivers[i]->name) == 0) {
  97             dbprintf(("security_getdriver(name=%s) returns %p\n",
  98                         name, drivers[i]));
  99             return (drivers[i]);
 100         }
 101     }
 102     dbprintf(("security_getdriver(name=%s) returns NULL\n", name));
 103     return (NULL);
 104 }
 105
 106 /*
 107  * For the drivers: initialize the common part of a security_handle_t
 108  */
 109 void
 110 security_handleinit(
 111     security_handle_t *         handle,
 112     const security_driver_t *   driver)
 113 {
 114     dbprintf(("security_handleinit(handle=%p, driver=%p (%s))\n",
 115                 handle, driver, driver->name));
 116     handle->driver = driver;
 117     handle->error = stralloc("unknown protocol error");
 118 }
 119
 120 printf_arglist_function1(void security_seterror, security_handle_t *, handle,
 121     const char *, fmt)
 122 {
 123     static char buf[256];
 124     va_list argp;
 125
 126     assert(handle->error != NULL);
 127     arglist_start(argp, fmt);
 128     vsnprintf(buf, SIZEOF(buf), fmt, argp);
 129     arglist_end(argp);
 130     handle->error = newstralloc(handle->error, buf);
 131     dbprintf(("security_seterror(handle=%p, driver=%p (%s) error=%s)\n",
 132                 handle, handle->driver, handle->driver->name, handle->error));
 133 }
 134
 135 void
 136 security_close(
 137     security_handle_t * handle)
 138 {
 139     dbprintf(("security_close(handle=%p, driver=%p (%s))\n",
 140                 handle, handle->driver, handle->driver->name));
 141     amfree(handle->error);
 142     (*handle->driver->close)(handle);
 143 }
 144
 145 /*
 146  * For the drivers: initialize the common part of a security_stream_t
 147  */
 148 void
 149 security_streaminit(
 150     security_stream_t *         stream,
 151     const security_driver_t *   driver)
 152 {
 153     dbprintf(("security_streaminit(stream=%p, driver=%p (%s))\n",
 154                 stream, driver, driver->name));
 155     stream->driver = driver;
 156     stream->error = stralloc("unknown stream error");
 157 }
 158
 159 printf_arglist_function1(void security_stream_seterror,
 160     security_stream_t *, stream,
 161     const char *, fmt)
 162 {
 163     static char buf[256];
 164     va_list argp;
 165
 166     arglist_start(argp, fmt);
 167     vsnprintf(buf, SIZEOF(buf), fmt, argp);
 168     arglist_end(argp);
 169     stream->error = newstralloc(stream->error, buf);
 170     dbprintf(("security_stream_seterr(%p, %s)\n", stream, stream->error));
 171 }
 172
 173 void
 174 security_stream_close(
 175     security_stream_t * stream)
 176 {
 177     dbprintf(("security_stream_close(%p)\n", stream));
 178     amfree(stream->error);
 179     (*stream->driver->stream_close)(stream);
 180 }