diff options
Diffstat (limited to 'sys/rpc/svc_auth_unix.c')
| -rw-r--r-- | sys/rpc/svc_auth_unix.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/sys/rpc/svc_auth_unix.c b/sys/rpc/svc_auth_unix.c new file mode 100644 index 0000000..3b6969d --- /dev/null +++ b/sys/rpc/svc_auth_unix.c @@ -0,0 +1,144 @@ +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro"; +static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC"; +#endif +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * svc_auth_unix.c + * Handles UNIX flavor authentication parameters on the service side of rpc. + * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. + * _svcauth_unix does full blown unix style uid,gid+gids auth, + * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. + * Note: the shorthand has been gutted for efficiency. + * + * Copyright (C) 1984, Sun Microsystems, Inc. + */ + +#include <sys/param.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/systm.h> +#include <sys/ucred.h> + +#include <rpc/rpc.h> + +#include "rpc_com.h" + +#define MAX_MACHINE_NAME 255 +#define NGRPS 16 + +/* + * Unix longhand authenticator + */ +enum auth_stat +_svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) +{ + enum auth_stat stat; + XDR xdrs; + int32_t *buf; + uint32_t time; + struct xucred *xcr; + u_int auth_len; + size_t str_len, gid_len; + u_int i; + + xcr = rqst->rq_clntcred; + auth_len = (u_int)msg->rm_call.cb_cred.oa_length; + xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, + XDR_DECODE); + buf = XDR_INLINE(&xdrs, auth_len); + if (buf != NULL) { + time = IXDR_GET_UINT32(buf); + str_len = (size_t)IXDR_GET_UINT32(buf); + if (str_len > MAX_MACHINE_NAME) { + stat = AUTH_BADCRED; + goto done; + } + str_len = RNDUP(str_len); + buf += str_len / sizeof (int32_t); + xcr->cr_uid = IXDR_GET_UINT32(buf); + xcr->cr_groups[0] = IXDR_GET_UINT32(buf); + gid_len = (size_t)IXDR_GET_UINT32(buf); + if (gid_len > NGRPS) { + stat = AUTH_BADCRED; + goto done; + } + for (i = 0; i < gid_len; i++) { + if (i + 1 < NGROUPS) + xcr->cr_groups[i + 1] = IXDR_GET_INT32(buf); + else + buf++; + } + if (gid_len + 1 > NGROUPS) + xcr->cr_ngroups = NGROUPS; + else + xcr->cr_ngroups = gid_len + 1; + + /* + * five is the smallest unix credentials structure - + * timestamp, hostname len (0), uid, gid, and gids len (0). + */ + if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { + (void) printf("bad auth_len gid %ld str %ld auth %u\n", + (long)gid_len, (long)str_len, auth_len); + stat = AUTH_BADCRED; + goto done; + } + } else if (! xdr_authunix_parms(&xdrs, &time, xcr)) { + stat = AUTH_BADCRED; + goto done; + } + + rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; + rqst->rq_xprt->xp_verf.oa_length = 0; + stat = AUTH_OK; +done: + XDR_DESTROY(&xdrs); + + return (stat); +} + + +/* + * Shorthand unix authenticator + * Looks up longhand in a cache. + */ +/*ARGSUSED*/ +enum auth_stat +_svcauth_short(rqst, msg) + struct svc_req *rqst; + struct rpc_msg *msg; +{ + return (AUTH_REJECTEDCRED); +} |
