auth_des.c File Reference

#include <wintirpc.h>
#include <reentrant.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <rpc/des_crypt.h>
#include <rpc/types.h>
#include <rpc/auth.h>
#include <rpc/auth_des.h>
#include <rpc/clnt.h>
#include <rpc/xdr.h>
#include <rpcsvc/nis.h>

Include dependency graph for auth_des.c:

Go to the source code of this file.

Classes
struct	ad_private

Macros
#define	USEC_PER_SEC   1000000
#define	RTIME_TIMEOUT   5 /* seconds to wait for sync */
#define	AUTH_PRIVATE(auth)   (struct ad_private *) auth->ah_private
#define	ALLOC(object_type)   (object_type *) mem_alloc(sizeof(object_type))
#define	FREE(ptr, size)   mem_free((char *)(ptr), (int) size)
#define	ATTEMPT(xdr_op)   if (!(xdr_op)) return (FALSE)

Functions
bool_t	xdr_authdes_cred (XDR *, struct authdes_cred *)
bool_t	xdr_authdes_verf (XDR *, struct authdes_verf *)
int	key_encryptsession_pk ()
bool_t	__rpc_get_time_offset (struct timeval *, nis_server *, char *, char **, char **)
static void	authdes_nextverf (AUTH *)
static bool_t	authdes_marshal (AUTH *, XDR *)
static bool_t	authdes_validate (AUTH *, struct opaque_auth *)
static bool_t	authdes_refresh (AUTH *, void *)
static void	authdes_destroy (AUTH *)
static struct auth_ops *	authdes_ops (void)
AUTH *	authdes_pk_seccreate (const char *, netobj *, u_int, const char *, const des_block *, nis_server *)
AUTH *	authdes_seccreate (const char *servername, const u_int win, const char *timehost, const des_block *ckey)

Macro Definition Documentation

ALLOC

#define ALLOC

(

object_type

)

(object_type *) mem_alloc(sizeof(object_type))

Definition at line 63 of file auth_des.c.

ATTEMPT

#define ATTEMPT

(

xdr_op

)

if (!(xdr_op)) return (FALSE)

Definition at line 65 of file auth_des.c.

AUTH_PRIVATE

#define AUTH_PRIVATE

(

auth

)

(struct ad_private *) auth->ah_private

Definition at line 62 of file auth_des.c.

FREE

#define FREE	(		ptr,
			size
	)		mem_free((char *)(ptr), (int) size)

Definition at line 64 of file auth_des.c.

RTIME_TIMEOUT

#define RTIME_TIMEOUT   5 /* seconds to wait for sync */

Definition at line 60 of file auth_des.c.

USEC_PER_SEC

#define USEC_PER_SEC   1000000

Definition at line 59 of file auth_des.c.

Function Documentation

__rpc_get_time_offset()

bool_t __rpc_get_time_offset	(	struct timeval *	,
		nis_server *	,
		char *	,
		char **	,
		char **
	)

Referenced by authdes_refresh().

authdes_destroy()

static void authdes_destroy ( AUTH *  auth )

static

Definition at line 464 of file auth_des.c.

{
/* LINTED pointer alignment */
    struct ad_private *ad = AUTH_PRIVATE(auth);
 
    FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
    FREE(ad->ad_servername, ad->ad_servernamelen + 1);
    if (ad->ad_timehost)
        FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1);
    if (ad->ad_netid)
        FREE(ad->ad_netid, strlen(ad->ad_netid) + 1);
    if (ad->ad_uaddr)
        FREE(ad->ad_uaddr, strlen(ad->ad_uaddr) + 1);
    FREE(ad, sizeof (struct ad_private));
    FREE(auth, sizeof(AUTH));
}

Referenced by authdes_ops().

authdes_marshal()

static bool_t authdes_marshal ( AUTH *  auth, XDR *  xdrs  )

static

Definition at line 269 of file auth_des.c.

{
/* LINTED pointer alignment */
    struct ad_private *ad = AUTH_PRIVATE(auth);
    struct authdes_cred *cred = &ad->ad_cred;
    struct authdes_verf *verf = &ad->ad_verf;
    des_block cryptbuf[2];  
    des_block ivec;
    int status;
    int len;
    rpc_inline_t *ixdr;
 
    /*
     * Figure out the "time", accounting for any time difference
     * with the server if necessary.
     */
    (void) gettimeofday(&ad->ad_timestamp, (struct timezone *)NULL);
    ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec;
    ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec;
    while (ad->ad_timestamp.tv_usec >= USEC_PER_SEC) {
        ad->ad_timestamp.tv_usec -= USEC_PER_SEC;
        ad->ad_timestamp.tv_sec++;
    }
 
    /*
     * XDR the timestamp and possibly some other things, then
     * encrypt them.
     */
    ixdr = (rpc_inline_t *)cryptbuf;
    IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_sec);
    IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_usec);
    if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
        IXDR_PUT_U_INT32(ixdr, ad->ad_window);
        IXDR_PUT_U_INT32(ixdr, ad->ad_window - 1);
        ivec.key.high = ivec.key.low = 0;   
        status = cbc_crypt((char *)&auth->ah_key, (char *)cryptbuf, 
            (u_int) 2 * sizeof (des_block),
            DES_ENCRYPT | DES_HW, (char *)&ivec);
    } else {
        status = ecb_crypt((char *)&auth->ah_key, (char *)cryptbuf, 
            (u_int) sizeof (des_block),
            DES_ENCRYPT | DES_HW);
    }
    if (DES_FAILED(status)) {
        //syslog(LOG_ERR, "authdes_marshal: DES encryption failure");
        return (FALSE);
    }
    ad->ad_verf.adv_xtimestamp = cryptbuf[0];
    if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
        ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
        ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
    } else {
        ad->ad_cred.adc_nickname = ad->ad_nickname;
        ad->ad_verf.adv_winverf = 0;
    }
 
    /*
     * Serialize the credential and verifier into opaque
     * authentication data.
     */
    if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
        len = ((1 + 1 + 2 + 1)*BYTES_PER_XDR_UNIT + ad->ad_fullnamelen);
    } else {
        len = (1 + 1)*BYTES_PER_XDR_UNIT;
    }
 
    if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) {
        IXDR_PUT_INT32(ixdr, AUTH_DES);
        IXDR_PUT_INT32(ixdr, len);
    } else {
        ATTEMPT(xdr_putint32(xdrs, (int *)&auth->ah_cred.oa_flavor));
        ATTEMPT(xdr_putint32(xdrs, &len));
    }
    ATTEMPT(xdr_authdes_cred(xdrs, cred));
 
    len = (2 + 1)*BYTES_PER_XDR_UNIT; 
    if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) {
        IXDR_PUT_INT32(ixdr, AUTH_DES);
        IXDR_PUT_INT32(ixdr, len);
    } else {
        ATTEMPT(xdr_putint32(xdrs, (int *)&auth->ah_verf.oa_flavor));
        ATTEMPT(xdr_putint32(xdrs, &len));
    }
    ATTEMPT(xdr_authdes_verf(xdrs, verf));
    return (TRUE);
}

Referenced by authdes_ops().

authdes_nextverf()

static void authdes_nextverf ( AUTH *  auth )

static

Definition at line 259 of file auth_des.c.

{
    /* what the heck am I supposed to do??? */
}

Referenced by authdes_ops().

authdes_ops()

static struct auth_ops * authdes_ops ( void  )

static

Definition at line 482 of file auth_des.c.

{
    static struct auth_ops ops;
    extern mutex_t authdes_ops_lock;
 
    /* VARIABLES PROTECTED BY ops_lock: ops */
 
    mutex_lock(&authdes_ops_lock);
    if (ops.ah_nextverf == NULL) {
        ops.ah_nextverf = authdes_nextverf;
        ops.ah_marshal = authdes_marshal;
        ops.ah_validate = authdes_validate;
        ops.ah_refresh = authdes_refresh;
        ops.ah_destroy = authdes_destroy;
        }
    mutex_unlock(&authdes_ops_lock);
    return (&ops);
}

Referenced by authdes_pk_seccreate().

authdes_pk_seccreate()

AUTH * authdes_pk_seccreate	(	const char *	servername,
		netobj *	pkey,
		u_int	window,
		const char *	timehost,
		const des_block *	ckey,
		nis_server *	srvr
	)

Definition at line 150 of file auth_des.c.

{
    AUTH *auth;
    struct ad_private *ad;
    char namebuf[MAXNETNAMELEN+1];
 
    /*
     * Allocate everything now
     */
    auth = ALLOC(AUTH);
    if (auth == NULL) {
        //syslog(LOG_ERR, "authdes_pk_seccreate: out of memory");
        return (NULL);
    }
    ad = ALLOC(struct ad_private);
    if (ad == NULL) {
        //syslog(LOG_ERR, "authdes_pk_seccreate: out of memory");
        goto failed;
    }
    ad->ad_fullname = ad->ad_servername = NULL; /* Sanity reasons */
    ad->ad_timehost = NULL;
    ad->ad_netid = NULL;
    ad->ad_uaddr = NULL;
    ad->ad_nis_srvr = NULL;
    ad->ad_timediff.tv_sec = 0;
    ad->ad_timediff.tv_usec = 0;
    memcpy(ad->ad_pkey, pkey->n_bytes, pkey->n_len);
    if (!getnetname(namebuf))
        goto failed;
    ad->ad_fullnamelen = RNDUP((u_int) strlen(namebuf));
    ad->ad_fullname = (char *)mem_alloc(ad->ad_fullnamelen + 1);
    ad->ad_servernamelen = strlen(servername);
    ad->ad_servername = (char *)mem_alloc(ad->ad_servernamelen + 1);
 
    if (ad->ad_fullname == NULL || ad->ad_servername == NULL) {
        //syslog(LOG_ERR, "authdes_seccreate: out of memory");
        goto failed;
    }
    if (timehost != NULL) {
        ad->ad_timehost = (char *)mem_alloc(strlen(timehost) + 1);
        if (ad->ad_timehost == NULL) {
            //syslog(LOG_ERR, "authdes_seccreate: out of memory");
            goto failed;
        }
        memcpy(ad->ad_timehost, timehost, strlen(timehost) + 1);
        ad->ad_dosync = TRUE;
    } else if (srvr != NULL) {
        ad->ad_nis_srvr = srvr; /* transient */
        ad->ad_dosync = TRUE;
    } else {
        ad->ad_dosync = FALSE;
    }
    memcpy(ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1);
    memcpy(ad->ad_servername, servername, ad->ad_servernamelen + 1);
    ad->ad_window = window;
    if (ckey == NULL) {
        if (key_gendes(&auth->ah_key) < 0) {
            //syslog(LOG_ERR,
            //      "authdes_seccreate: keyserv(1m) is unable to generate session key");
            goto failed;
        }
    } else {
        auth->ah_key = *ckey;
    }
 
    /*
     * Set up auth handle
     */
    auth->ah_cred.oa_flavor = AUTH_DES;
    auth->ah_verf.oa_flavor = AUTH_DES;
    auth->ah_ops = authdes_ops();
    auth->ah_private = (caddr_t)ad;
 
    if (!authdes_refresh(auth, NULL)) {
        goto failed;
    }
    ad->ad_nis_srvr = NULL; /* not needed any longer */
    return (auth);
 
failed:
    if (auth)
        FREE(auth, sizeof (AUTH));
    if (ad) {
        if (ad->ad_fullname)
            FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
        if (ad->ad_servername)
            FREE(ad->ad_servername, ad->ad_servernamelen + 1);
        if (ad->ad_timehost)
            FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1);
        if (ad->ad_netid)
            FREE(ad->ad_netid, strlen(ad->ad_netid) + 1);
        if (ad->ad_uaddr)
            FREE(ad->ad_uaddr, strlen(ad->ad_uaddr) + 1);
        FREE(ad, sizeof (struct ad_private));
    }
    return (NULL);
}

Referenced by authdes_seccreate().

authdes_refresh()

static bool_t authdes_refresh ( AUTH *  auth, void *  dummy  )

static

Definition at line 420 of file auth_des.c.

{
/* LINTED pointer alignment */
    struct ad_private *ad = AUTH_PRIVATE(auth);
    struct authdes_cred *cred = &ad->ad_cred;
    int     ok;
    netobj      pkey;
 
    if (ad->ad_dosync) {
#if 1 // WINDOWS
        ok = 1;
#else
                ok = __rpc_get_time_offset(&ad->ad_timediff, ad->ad_nis_srvr,
            ad->ad_timehost, &(ad->ad_uaddr),
            &(ad->ad_netid));
#endif
        if (! ok) {
            /*
             * Hope the clocks are synced!
             */
            ad->ad_dosync = 0;
            //syslog(LOG_DEBUG,
            //    "authdes_refresh: unable to synchronize clock");
         }
    }
    ad->ad_xkey = auth->ah_key;
    pkey.n_bytes = (char *)(ad->ad_pkey);
    pkey.n_len = (u_int)strlen((char *)ad->ad_pkey) + 1;
    if (key_encryptsession_pk(ad->ad_servername, &pkey, &ad->ad_xkey) < 0) {
        //syslog(LOG_INFO,
        //    "authdes_refresh: keyserv(1m) is unable to encrypt session key");
        return (FALSE);
    }
    cred->adc_fullname.key = ad->ad_xkey;
    cred->adc_namekind = ADN_FULLNAME;
    cred->adc_fullname.name = ad->ad_fullname;
    return (TRUE);
}

Referenced by authdes_ops(), and authdes_pk_seccreate().

authdes_seccreate()

AUTH * authdes_seccreate	(	const char *	servername,
		const u_int	win,
		const char *	timehost,
		const des_block *	ckey
	)

Definition at line 123 of file auth_des.c.

{
    u_char  pkey_data[1024];
    netobj  pkey;
    AUTH    *dummy;
 
    if (! getpublickey(servername, (char *) pkey_data)) {
        //syslog(LOG_ERR,
        //    "authdes_seccreate: no public key found for %s",
        //    servername);
        return (NULL);
    }
 
    pkey.n_bytes = (char *) pkey_data;
    pkey.n_len = (u_int)strlen((char *)pkey_data) + 1;
    dummy = authdes_pk_seccreate(servername, &pkey, win, timehost,
        ckey, NULL);
    return (dummy);
}

authdes_validate()

static bool_t authdes_validate ( AUTH *  auth, struct opaque_auth *  rverf  )

static

Definition at line 361 of file auth_des.c.

{
/* LINTED pointer alignment */
    struct ad_private *ad = AUTH_PRIVATE(auth);
    struct authdes_verf verf;
    int status;
    uint32_t *ixdr;
    des_block buf;
 
    if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT) {
        return (FALSE);
    }
/* LINTED pointer alignment */
    ixdr = (uint32_t *)rverf->oa_base;
    buf.key.high = (uint32_t)*ixdr++;
    buf.key.low = (uint32_t)*ixdr++;
    verf.adv_int_u = (uint32_t)*ixdr++;
 
    /*
     * Decrypt the timestamp
     */
    status = ecb_crypt((char *)&auth->ah_key, (char *)&buf,
        (u_int)sizeof (des_block), DES_DECRYPT | DES_HW);
 
    if (DES_FAILED(status)) {
        //syslog(LOG_ERR, "authdes_validate: DES decryption failure");
        return (FALSE);
    }
 
    /*
     * xdr the decrypted timestamp
     */
/* LINTED pointer alignment */
    ixdr = (uint32_t *)buf.c;
    verf.adv_timestamp.tv_sec = IXDR_GET_INT32(ixdr) + 1;
    verf.adv_timestamp.tv_usec = IXDR_GET_INT32(ixdr);
 
    /*
     * validate
     */
    if (bcmp((char *)&ad->ad_timestamp, (char *)&verf.adv_timestamp,
         sizeof(struct timeval)) != 0) {
        //syslog(LOG_DEBUG, "authdes_validate: verifier mismatch");
        return (FALSE);
    }
 
    /*
     * We have a nickname now, let's use it
     */
    ad->ad_nickname = verf.adv_nickname;
    ad->ad_cred.adc_namekind = ADN_NICKNAME;
    return (TRUE);
}

Referenced by authdes_ops().

key_encryptsession_pk()

int key_encryptsession_pk

(

)

Referenced by authdes_refresh().

xdr_authdes_cred()

bool_t xdr_authdes_cred	(	XDR *	xdrs,
		struct authdes_cred *	cred
	)

Definition at line 46 of file authdes_prot.c.

{
    /*
     * Unrolled xdr
     */
    ATTEMPT(xdr_enum(xdrs, (enum_t *)&cred->adc_namekind));
    switch (cred->adc_namekind) {
    case ADN_FULLNAME:
        ATTEMPT(xdr_string(xdrs, &cred->adc_fullname.name,
            MAXNETNAMELEN));
        ATTEMPT(xdr_opaque(xdrs, (caddr_t)&cred->adc_fullname.key,
            sizeof(des_block)));
        ATTEMPT(xdr_opaque(xdrs, (caddr_t)&cred->adc_fullname.window,
            sizeof(cred->adc_fullname.window)));
        return (TRUE);
    case ADN_NICKNAME:
        ATTEMPT(xdr_opaque(xdrs, (caddr_t)&cred->adc_nickname,
            sizeof(cred->adc_nickname)));
        return (TRUE);
    default:
        return (FALSE);
    }
}

Referenced by authdes_marshal().

xdr_authdes_verf()

bool_t xdr_authdes_verf	(	XDR *	xdrs,
		struct authdes_verf *	verf
	)

Definition at line 74 of file authdes_prot.c.

{
    /*
     * Unrolled xdr
     */
    ATTEMPT(xdr_opaque(xdrs, (caddr_t)&verf->adv_xtimestamp,
        sizeof(des_block)));
    ATTEMPT(xdr_opaque(xdrs, (caddr_t)&verf->adv_int_u,
        sizeof(verf->adv_int_u)));
    return (TRUE);
}

Referenced by authdes_marshal().