svc_authux.c 4.7 KB

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  1. /*
  2. * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  3. * unrestricted use provided that this legend is included on all tape
  4. * media and as a part of the software program in whole or part. Users
  5. * may copy or modify Sun RPC without charge, but are not authorized
  6. * to license or distribute it to anyone else except as part of a product or
  7. * program developed by the user.
  8. *
  9. * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10. * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11. * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12. *
  13. * Sun RPC is provided with no support and without any obligation on the
  14. * part of Sun Microsystems, Inc. to assist in its use, correction,
  15. * modification or enhancement.
  16. *
  17. * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18. * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19. * OR ANY PART THEREOF.
  20. *
  21. * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22. * or profits or other special, indirect and consequential damages, even if
  23. * Sun has been advised of the possibility of such damages.
  24. *
  25. * Sun Microsystems, Inc.
  26. * 2550 Garcia Avenue
  27. * Mountain View, California 94043
  28. */
  29. /*
  30. * svc_auth_unix.c
  31. * Handles UNIX flavor authentication parameters on the service side of rpc.
  32. * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
  33. * _svcauth_unix does full blown unix style uid,gid+gids auth,
  34. * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
  35. * Note: the shorthand has been gutted for efficiency.
  36. *
  37. * Copyright (C) 1984, Sun Microsystems, Inc.
  38. */
  39. #define __FORCE_GLIBC
  40. #include <features.h>
  41. #include <stdio.h>
  42. #include <string.h>
  43. #include <rpc/rpc.h>
  44. #include <rpc/svc.h>
  45. /* Experimentally off - libc_hidden_proto(memcpy) */
  46. libc_hidden_proto(printf)
  47. libc_hidden_proto(xdrmem_create)
  48. libc_hidden_proto(xdr_authunix_parms)
  49. /*
  50. * Unix longhand authenticator
  51. */
  52. enum auth_stat
  53. _svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg) attribute_hidden;
  54. enum auth_stat
  55. _svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
  56. {
  57. enum auth_stat stat;
  58. XDR xdrs;
  59. struct authunix_parms *aup;
  60. int32_t *buf;
  61. struct area
  62. {
  63. struct authunix_parms area_aup;
  64. char area_machname[MAX_MACHINE_NAME + 1];
  65. gid_t area_gids[NGRPS];
  66. }
  67. *area;
  68. u_int auth_len;
  69. u_int str_len, gid_len;
  70. u_int i;
  71. area = (struct area *) rqst->rq_clntcred;
  72. aup = &area->area_aup;
  73. aup->aup_machname = area->area_machname;
  74. aup->aup_gids = area->area_gids;
  75. auth_len = (u_int) msg->rm_call.cb_cred.oa_length;
  76. xdrmem_create (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, XDR_DECODE);
  77. buf = XDR_INLINE (&xdrs, auth_len);
  78. if (buf != NULL)
  79. {
  80. aup->aup_time = IXDR_GET_LONG (buf);
  81. str_len = IXDR_GET_U_INT32 (buf);
  82. if (str_len > MAX_MACHINE_NAME)
  83. {
  84. stat = AUTH_BADCRED;
  85. goto done;
  86. }
  87. memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len);
  88. aup->aup_machname[str_len] = 0;
  89. str_len = RNDUP (str_len);
  90. buf = (int32_t *) ((char *) buf + str_len);
  91. aup->aup_uid = IXDR_GET_LONG (buf);
  92. aup->aup_gid = IXDR_GET_LONG (buf);
  93. gid_len = IXDR_GET_U_INT32 (buf);
  94. if (gid_len > NGRPS)
  95. {
  96. stat = AUTH_BADCRED;
  97. goto done;
  98. }
  99. aup->aup_len = gid_len;
  100. for (i = 0; i < gid_len; i++)
  101. {
  102. aup->aup_gids[i] = IXDR_GET_LONG (buf);
  103. }
  104. /*
  105. * five is the smallest unix credentials structure -
  106. * timestamp, hostname len (0), uid, gid, and gids len (0).
  107. */
  108. if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len)
  109. {
  110. (void) printf ("bad auth_len gid %d str %d auth %d\n",
  111. gid_len, str_len, auth_len);
  112. stat = AUTH_BADCRED;
  113. goto done;
  114. }
  115. }
  116. else if (!xdr_authunix_parms (&xdrs, aup))
  117. {
  118. xdrs.x_op = XDR_FREE;
  119. (void) xdr_authunix_parms (&xdrs, aup);
  120. stat = AUTH_BADCRED;
  121. goto done;
  122. }
  123. /* get the verifier */
  124. if ((u_int)msg->rm_call.cb_verf.oa_length)
  125. {
  126. rqst->rq_xprt->xp_verf.oa_flavor =
  127. msg->rm_call.cb_verf.oa_flavor;
  128. rqst->rq_xprt->xp_verf.oa_base =
  129. msg->rm_call.cb_verf.oa_base;
  130. rqst->rq_xprt->xp_verf.oa_length =
  131. msg->rm_call.cb_verf.oa_length;
  132. }
  133. else
  134. {
  135. rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
  136. rqst->rq_xprt->xp_verf.oa_length = 0;
  137. }
  138. stat = AUTH_OK;
  139. done:
  140. XDR_DESTROY (&xdrs);
  141. return stat;
  142. }
  143. /*
  144. * Shorthand unix authenticator
  145. * Looks up longhand in a cache.
  146. */
  147. /*ARGSUSED */
  148. enum auth_stat
  149. _svcauth_short (struct svc_req *rqst attribute_unused, struct rpc_msg *msg attribute_unused) attribute_hidden;
  150. enum auth_stat
  151. _svcauth_short (struct svc_req *rqst attribute_unused, struct rpc_msg *msg attribute_unused)
  152. {
  153. return AUTH_REJECTEDCRED;
  154. }