1 | #include <machine/rtems-bsd-kernel-space.h> |
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2 | |
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3 | /* $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $ */ |
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4 | |
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5 | /*- |
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6 | * SPDX-License-Identifier: BSD-3-Clause |
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7 | * |
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8 | * Copyright (c) 2009, Sun Microsystems, Inc. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions are met: |
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13 | * - Redistributions of source code must retain the above copyright notice, |
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14 | * this list of conditions and the following disclaimer. |
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15 | * - Redistributions in binary form must reproduce the above copyright notice, |
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16 | * this list of conditions and the following disclaimer in the documentation |
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17 | * and/or other materials provided with the distribution. |
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18 | * - Neither the name of Sun Microsystems, Inc. nor the names of its |
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19 | * contributors may be used to endorse or promote products derived |
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20 | * from this software without specific prior written permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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32 | * POSSIBILITY OF SUCH DAMAGE. |
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33 | */ |
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34 | /* |
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35 | * Copyright (c) 1986-1991 by Sun Microsystems Inc. |
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36 | */ |
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37 | |
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38 | #if defined(LIBC_SCCS) && !defined(lint) |
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39 | #ident "@(#)svc_auth.c 1.16 94/04/24 SMI" |
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40 | static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro"; |
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41 | #endif |
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42 | #include <sys/cdefs.h> |
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43 | __FBSDID("$FreeBSD$"); |
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44 | |
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45 | /* |
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46 | * svc_auth.c, Server-side rpc authenticator interface. |
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47 | * |
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48 | */ |
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49 | |
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50 | #include <sys/param.h> |
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51 | #include <sys/lock.h> |
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52 | #include <sys/mutex.h> |
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53 | #include <sys/systm.h> |
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54 | #include <sys/jail.h> |
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55 | #include <sys/ucred.h> |
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56 | |
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57 | #include <rpc/rpc.h> |
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58 | |
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59 | static enum auth_stat (*_svcauth_rpcsec_gss)(struct svc_req *, |
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60 | struct rpc_msg *) = NULL; |
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61 | static int (*_svcauth_rpcsec_gss_getcred)(struct svc_req *, |
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62 | struct ucred **, int *); |
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63 | |
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64 | static struct svc_auth_ops svc_auth_null_ops; |
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65 | |
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66 | /* |
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67 | * The call rpc message, msg has been obtained from the wire. The msg contains |
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68 | * the raw form of credentials and verifiers. authenticate returns AUTH_OK |
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69 | * if the msg is successfully authenticated. If AUTH_OK then the routine also |
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70 | * does the following things: |
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71 | * set rqst->rq_xprt->verf to the appropriate response verifier; |
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72 | * sets rqst->rq_client_cred to the "cooked" form of the credentials. |
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73 | * |
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74 | * NB: rqst->rq_cxprt->verf must be pre-alloctaed; |
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75 | * its length is set appropriately. |
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76 | * |
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77 | * The caller still owns and is responsible for msg->u.cmb.cred and |
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78 | * msg->u.cmb.verf. The authentication system retains ownership of |
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79 | * rqst->rq_client_cred, the cooked credentials. |
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80 | * |
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81 | * There is an assumption that any flavour less than AUTH_NULL is |
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82 | * invalid. |
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83 | */ |
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84 | enum auth_stat |
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85 | _authenticate(struct svc_req *rqst, struct rpc_msg *msg) |
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86 | { |
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87 | int cred_flavor; |
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88 | enum auth_stat dummy; |
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89 | |
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90 | rqst->rq_cred = msg->rm_call.cb_cred; |
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91 | rqst->rq_auth.svc_ah_ops = &svc_auth_null_ops; |
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92 | rqst->rq_auth.svc_ah_private = NULL; |
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93 | cred_flavor = rqst->rq_cred.oa_flavor; |
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94 | switch (cred_flavor) { |
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95 | case AUTH_NULL: |
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96 | dummy = _svcauth_null(rqst, msg); |
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97 | return (dummy); |
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98 | case AUTH_SYS: |
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99 | dummy = _svcauth_unix(rqst, msg); |
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100 | return (dummy); |
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101 | case AUTH_SHORT: |
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102 | dummy = _svcauth_short(rqst, msg); |
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103 | return (dummy); |
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104 | case RPCSEC_GSS: |
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105 | if (!_svcauth_rpcsec_gss) |
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106 | return (AUTH_REJECTEDCRED); |
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107 | dummy = _svcauth_rpcsec_gss(rqst, msg); |
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108 | return (dummy); |
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109 | default: |
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110 | break; |
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111 | } |
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112 | |
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113 | return (AUTH_REJECTEDCRED); |
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114 | } |
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115 | |
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116 | /* |
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117 | * A set of null auth methods used by any authentication protocols |
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118 | * that don't need to inspect or modify the message body. |
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119 | */ |
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120 | static bool_t |
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121 | svcauth_null_wrap(SVCAUTH *auth, struct mbuf **mp) |
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122 | { |
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123 | |
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124 | return (TRUE); |
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125 | } |
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126 | |
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127 | static bool_t |
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128 | svcauth_null_unwrap(SVCAUTH *auth, struct mbuf **mp) |
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129 | { |
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130 | |
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131 | return (TRUE); |
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132 | } |
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133 | |
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134 | static void |
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135 | svcauth_null_release(SVCAUTH *auth) |
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136 | { |
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137 | |
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138 | } |
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139 | |
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140 | static struct svc_auth_ops svc_auth_null_ops = { |
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141 | svcauth_null_wrap, |
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142 | svcauth_null_unwrap, |
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143 | svcauth_null_release, |
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144 | }; |
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145 | |
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146 | /*ARGSUSED*/ |
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147 | enum auth_stat |
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148 | _svcauth_null(struct svc_req *rqst, struct rpc_msg *msg) |
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149 | { |
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150 | |
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151 | rqst->rq_verf = _null_auth; |
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152 | return (AUTH_OK); |
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153 | } |
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154 | |
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155 | int |
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156 | svc_auth_reg(int flavor, |
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157 | enum auth_stat (*svcauth)(struct svc_req *, struct rpc_msg *), |
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158 | int (*getcred)(struct svc_req *, struct ucred **, int *)) |
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159 | { |
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160 | |
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161 | if (flavor == RPCSEC_GSS) { |
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162 | _svcauth_rpcsec_gss = svcauth; |
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163 | _svcauth_rpcsec_gss_getcred = getcred; |
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164 | } |
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165 | return (TRUE); |
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166 | } |
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167 | |
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168 | int |
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169 | svc_getcred(struct svc_req *rqst, struct ucred **crp, int *flavorp) |
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170 | { |
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171 | struct ucred *cr = NULL; |
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172 | int flavor; |
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173 | struct xucred *xcr; |
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174 | |
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175 | flavor = rqst->rq_cred.oa_flavor; |
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176 | if (flavorp) |
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177 | *flavorp = flavor; |
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178 | |
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179 | switch (flavor) { |
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180 | case AUTH_UNIX: |
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181 | xcr = (struct xucred *) rqst->rq_clntcred; |
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182 | cr = crget(); |
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183 | cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid; |
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184 | crsetgroups(cr, xcr->cr_ngroups, xcr->cr_groups); |
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185 | cr->cr_rgid = cr->cr_svgid = cr->cr_groups[0]; |
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186 | #ifndef __rtems__ |
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187 | cr->cr_prison = &prison0; |
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188 | prison_hold(cr->cr_prison); |
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189 | #endif /* __rtems__ */ |
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190 | *crp = cr; |
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191 | return (TRUE); |
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192 | |
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193 | case RPCSEC_GSS: |
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194 | if (!_svcauth_rpcsec_gss_getcred) |
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195 | return (FALSE); |
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196 | return (_svcauth_rpcsec_gss_getcred(rqst, crp, flavorp)); |
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197 | |
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198 | default: |
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199 | return (FALSE); |
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200 | } |
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201 | } |
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