svc_auth_unix.c File Reference

#include <wintirpc.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <rpc/rpc.h>

Include dependency graph for svc_auth_unix.c:

Go to the source code of this file.

Functions
enum auth_stat	_svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
enum auth_stat	_svcauth_short (struct svc_req *rqst, struct rpc_msg *msg)

Function Documentation

_svcauth_short()

enum auth_stat _svcauth_short	(	struct svc_req *	rqst,
		struct rpc_msg *	msg
	)

Definition at line 142 of file svc_auth_unix.c.

{
    return (AUTH_REJECTEDCRED);
}

Referenced by _authenticate().

_svcauth_unix()

enum auth_stat _svcauth_unix	(	struct svc_req *	rqst,
		struct rpc_msg *	msg
	)

Definition at line 51 of file svc_auth_unix.c.

{
    enum auth_stat stat;
    XDR xdrs;
    struct authunix_parms *aup;
    int32_t *buf;
    struct area {
        struct authunix_parms area_aup;
        char area_machname[MAX_MACHINE_NAME+1];
        gid_t area_gids[NGRPS];
    } *area;
    u_int auth_len;
    size_t str_len, gid_len;
    u_int i;
 
    assert(rqst != NULL);
    assert(msg != NULL);
 
    area = (struct area *) rqst->rq_clntcred;
    aup = &area->area_aup;
    aup->aup_machname = area->area_machname;
    aup->aup_gids = area->area_gids;
    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) {
        aup->aup_time = IXDR_GET_INT32(buf);
        str_len = (size_t)IXDR_GET_U_INT32(buf);
        if (str_len > MAX_MACHINE_NAME) {
            stat = AUTH_BADCRED;
            goto done;
        }
        memmove(aup->aup_machname, buf, str_len);
        aup->aup_machname[str_len] = 0;
        str_len = RNDUP(str_len);
        buf += str_len / sizeof (int32_t);
        aup->aup_uid = (int)IXDR_GET_INT32(buf);
        aup->aup_gid = (int)IXDR_GET_INT32(buf);
        gid_len = (size_t)IXDR_GET_U_INT32(buf);
        if (gid_len > NGRPS) {
            stat = AUTH_BADCRED;
            goto done;
        }
        aup->aup_len = gid_len;
        for (i = 0; i < gid_len; i++) {
            aup->aup_gids[i] = (int)IXDR_GET_INT32(buf);
        }
        /*
         * 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, aup)) {
        xdrs.x_op = XDR_FREE;
        (void)xdr_authunix_parms(&xdrs, aup);
        stat = AUTH_BADCRED;
        goto done;
    }
 
       /* get the verifier */
    if ((u_int)msg->rm_call.cb_verf.oa_length) {
        rqst->rq_xprt->xp_verf.oa_flavor =
            msg->rm_call.cb_verf.oa_flavor;
        rqst->rq_xprt->xp_verf.oa_base =
            msg->rm_call.cb_verf.oa_base;
        rqst->rq_xprt->xp_verf.oa_length =
            msg->rm_call.cb_verf.oa_length;
    } else {
        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);
}

Referenced by _authenticate().