diff options
Diffstat (limited to 'sunrpc/auth_unix.c')
| -rw-r--r-- | sunrpc/auth_unix.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/sunrpc/auth_unix.c b/sunrpc/auth_unix.c new file mode 100644 index 0000000..87ff2b6 --- /dev/null +++ b/sunrpc/auth_unix.c @@ -0,0 +1,319 @@ +/* @(#)auth_unix.c 2.2 88/08/01 4.0 RPCSRC */ +/* + * 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(lint) && defined(SCCSIDS) +static char sccsid[] = "@(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro"; +#endif + +/* + * auth_unix.c, Implements UNIX style authentication parameters. + * + * Copyright (C) 1984, Sun Microsystems, Inc. + * + * The system is very weak. The client uses no encryption for it's + * credentials and only sends null verifiers. The server sends backs + * null verifiers or optionally a verifier that suggests a new short hand + * for the credentials. + * + */ + +#include <stdio.h> + +#include <rpc/types.h> +#include <rpc/xdr.h> +#include <rpc/auth.h> +#include <rpc/auth_unix.h> + +/* + * Unix authenticator operations vector + */ +static void authunix_nextverf(); +static bool_t authunix_marshal(); +static bool_t authunix_validate(); +static bool_t authunix_refresh(); +static void authunix_destroy(); + +static struct auth_ops auth_unix_ops = { + authunix_nextverf, + authunix_marshal, + authunix_validate, + authunix_refresh, + authunix_destroy +}; + +/* + * This struct is pointed to by the ah_private field of an auth_handle. + */ +struct audata { + struct opaque_auth au_origcred; /* original credentials */ + struct opaque_auth au_shcred; /* short hand cred */ + u_long au_shfaults; /* short hand cache faults */ + char au_marshed[MAX_AUTH_BYTES]; + u_int au_mpos; /* xdr pos at end of marshed */ +}; +#define AUTH_PRIVATE(auth) ((struct audata *)auth->ah_private) + +static bool_t marshal_new_auth(); + + +/* + * Create a unix style authenticator. + * Returns an auth handle with the given stuff in it. + */ +AUTH * +authunix_create(machname, uid, gid, len, aup_gids) + char *machname; + int uid; + int gid; + register int len; + int *aup_gids; +{ + struct authunix_parms aup; + char mymem[MAX_AUTH_BYTES]; + struct timeval now; + XDR xdrs; + register AUTH *auth; + register struct audata *au; + + /* + * Allocate and set up auth handle + */ + auth = (AUTH *)mem_alloc(sizeof(*auth)); +#ifndef KERNEL + if (auth == NULL) { + (void)fprintf(stderr, "authunix_create: out of memory\n"); + return (NULL); + } +#endif + au = (struct audata *)mem_alloc(sizeof(*au)); +#ifndef KERNEL + if (au == NULL) { + (void)fprintf(stderr, "authunix_create: out of memory\n"); + return (NULL); + } +#endif + auth->ah_ops = &auth_unix_ops; + auth->ah_private = (caddr_t)au; + auth->ah_verf = au->au_shcred = _null_auth; + au->au_shfaults = 0; + + /* + * fill in param struct from the given params + */ + (void)gettimeofday(&now, (struct timezone *)0); + aup.aup_time = now.tv_sec; + aup.aup_machname = machname; + aup.aup_uid = uid; + aup.aup_gid = gid; + aup.aup_len = (u_int)len; + aup.aup_gids = aup_gids; + + /* + * Serialize the parameters into origcred + */ + xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE); + if (! xdr_authunix_parms(&xdrs, &aup)) + abort(); + au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs); + au->au_origcred.oa_flavor = AUTH_UNIX; +#ifdef KERNEL + au->au_origcred.oa_base = mem_alloc((u_int) len); +#else + if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) { + (void)fprintf(stderr, "authunix_create: out of memory\n"); + return (NULL); + } +#endif + bcopy(mymem, au->au_origcred.oa_base, (u_int)len); + + /* + * set auth handle to reflect new cred. + */ + auth->ah_cred = au->au_origcred; + marshal_new_auth(auth); + return (auth); +} + +/* + * Returns an auth handle with parameters determined by doing lots of + * syscalls. + */ +AUTH * +authunix_create_default() +{ + register int len; + char machname[MAX_MACHINE_NAME + 1]; + register int uid; + register int gid; + int gids[NGRPS]; + + if (gethostname(machname, MAX_MACHINE_NAME) == -1) + abort(); + machname[MAX_MACHINE_NAME] = 0; + uid = geteuid(); + gid = getegid(); + if ((len = getgroups(NGRPS, gids)) < 0) + abort(); + return (authunix_create(machname, uid, gid, len, gids)); +} + +/* + * authunix operations + */ + +static void +authunix_nextverf(auth) + AUTH *auth; +{ + /* no action necessary */ +} + +static bool_t +authunix_marshal(auth, xdrs) + AUTH *auth; + XDR *xdrs; +{ + register struct audata *au = AUTH_PRIVATE(auth); + + return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos)); +} + +static bool_t +authunix_validate(auth, verf) + register AUTH *auth; + struct opaque_auth verf; +{ + register struct audata *au; + XDR xdrs; + + if (verf.oa_flavor == AUTH_SHORT) { + au = AUTH_PRIVATE(auth); + xdrmem_create(&xdrs, verf.oa_base, verf.oa_length, XDR_DECODE); + + if (au->au_shcred.oa_base != NULL) { + mem_free(au->au_shcred.oa_base, + au->au_shcred.oa_length); + au->au_shcred.oa_base = NULL; + } + if (xdr_opaque_auth(&xdrs, &au->au_shcred)) { + auth->ah_cred = au->au_shcred; + } else { + xdrs.x_op = XDR_FREE; + (void)xdr_opaque_auth(&xdrs, &au->au_shcred); + au->au_shcred.oa_base = NULL; + auth->ah_cred = au->au_origcred; + } + marshal_new_auth(auth); + } + return (TRUE); +} + +static bool_t +authunix_refresh(auth) + register AUTH *auth; +{ + register struct audata *au = AUTH_PRIVATE(auth); + struct authunix_parms aup; + struct timeval now; + XDR xdrs; + register int stat; + + if (auth->ah_cred.oa_base == au->au_origcred.oa_base) { + /* there is no hope. Punt */ + return (FALSE); + } + au->au_shfaults ++; + + /* first deserialize the creds back into a struct authunix_parms */ + aup.aup_machname = NULL; + aup.aup_gids = (int *)NULL; + xdrmem_create(&xdrs, au->au_origcred.oa_base, + au->au_origcred.oa_length, XDR_DECODE); + stat = xdr_authunix_parms(&xdrs, &aup); + if (! stat) + goto done; + + /* update the time and serialize in place */ + (void)gettimeofday(&now, (struct timezone *)0); + aup.aup_time = now.tv_sec; + xdrs.x_op = XDR_ENCODE; + XDR_SETPOS(&xdrs, 0); + stat = xdr_authunix_parms(&xdrs, &aup); + if (! stat) + goto done; + auth->ah_cred = au->au_origcred; + marshal_new_auth(auth); +done: + /* free the struct authunix_parms created by deserializing */ + xdrs.x_op = XDR_FREE; + (void)xdr_authunix_parms(&xdrs, &aup); + XDR_DESTROY(&xdrs); + return (stat); +} + +static void +authunix_destroy(auth) + register AUTH *auth; +{ + register struct audata *au = AUTH_PRIVATE(auth); + + mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length); + + if (au->au_shcred.oa_base != NULL) + mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length); + + mem_free(auth->ah_private, sizeof(struct audata)); + + if (auth->ah_verf.oa_base != NULL) + mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length); + + mem_free((caddr_t)auth, sizeof(*auth)); +} + +/* + * Marshals (pre-serializes) an auth struct. + * sets private data, au_marshed and au_mpos + */ +static bool_t +marshal_new_auth(auth) + register AUTH *auth; +{ + XDR xdr_stream; + register XDR *xdrs = &xdr_stream; + register struct audata *au = AUTH_PRIVATE(auth); + + xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE); + if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) || + (! xdr_opaque_auth(xdrs, &(auth->ah_verf)))) { + perror("auth_none.c - Fatal marshalling problem"); + } else { + au->au_mpos = XDR_GETPOS(xdrs); + } + XDR_DESTROY(xdrs); +} |