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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [librpc/] [src/] [rpc/] [key_call.c] - Rev 593
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/* * 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 */ /* * Copyright (c) 1986-1991 by Sun Microsystems Inc. * * $FreeBSD: src/lib/libc/rpc/key_call.c,v 1.3 2000/01/27 23:06:39 jasone Exp $ */ #ident "@(#)key_call.c 1.25 94/04/24 SMI" /* * key_call.c, Interface to keyserver * * setsecretkey(key) - set your secret key * encryptsessionkey(agent, deskey) - encrypt a session key to talk to agent * decryptsessionkey(agent, deskey) - decrypt ditto * gendeskey(deskey) - generate a secure des key */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <errno.h> #include <rpc/rpc.h> #include <rpc/auth.h> #include <rpc/auth_unix.h> #include <rpc/key_prot.h> #include <string.h> #include <sys/utsname.h> #include <stdlib.h> #include <signal.h> #include <sys/wait.h> #include <sys/fcntl.h> #define KEY_TIMEOUT 5 /* per-try timeout in seconds */ #define KEY_NRETRY 12 /* number of retries */ #ifdef DEBUG #define debug(msg) (void) fprintf(stderr, "%s\n", msg); #else #define debug(msg) #endif /* DEBUG */ /* * Hack to allow the keyserver to use AUTH_DES (for authenticated * NIS+ calls, for example). The only functions that get called * are key_encryptsession_pk, key_decryptsession_pk, and key_gendes. * * The approach is to have the keyserver fill in pointers to local * implementations of these functions, and to call those in key_call(). */ cryptkeyres *(*__key_encryptsession_pk_LOCAL)() = 0; cryptkeyres *(*__key_decryptsession_pk_LOCAL)() = 0; des_block *(*__key_gendes_LOCAL)() = 0; static int key_call __P(( u_long, xdrproc_t, char *, xdrproc_t, char * )); int key_setsecret(secretkey) const char *secretkey; { keystatus status; if (!key_call((u_long) KEY_SET, xdr_keybuf, (char *) secretkey, xdr_keystatus, (char *)&status)) { return (-1); } if (status != KEY_SUCCESS) { debug("set status is nonzero"); return (-1); } return (0); } /* key_secretkey_is_set() returns 1 if the keyserver has a secret key * stored for the caller's effective uid; it returns 0 otherwise * * N.B.: The KEY_NET_GET key call is undocumented. Applications shouldn't * be using it, because it allows them to get the user's secret key. */ int key_secretkey_is_set(void) { struct key_netstres kres; memset((void*)&kres, 0, sizeof (kres)); if (key_call((u_long) KEY_NET_GET, xdr_void, (char *)NULL, xdr_key_netstres, (char *) &kres) && (kres.status == KEY_SUCCESS) && (kres.key_netstres_u.knet.st_priv_key[0] != 0)) { /* avoid leaving secret key in memory */ memset(kres.key_netstres_u.knet.st_priv_key, 0, HEXKEYBYTES); return (1); } return (0); } int key_encryptsession_pk(remotename, remotekey, deskey) char *remotename; netobj *remotekey; des_block *deskey; { cryptkeyarg2 arg; cryptkeyres res; arg.remotename = remotename; arg.remotekey = *remotekey; arg.deskey = *deskey; if (!key_call((u_long)KEY_ENCRYPT_PK, xdr_cryptkeyarg2, (char *)&arg, xdr_cryptkeyres, (char *)&res)) { return (-1); } if (res.status != KEY_SUCCESS) { debug("encrypt status is nonzero"); return (-1); } *deskey = res.cryptkeyres_u.deskey; return (0); } int key_decryptsession_pk(remotename, remotekey, deskey) char *remotename; netobj *remotekey; des_block *deskey; { cryptkeyarg2 arg; cryptkeyres res; arg.remotename = remotename; arg.remotekey = *remotekey; arg.deskey = *deskey; if (!key_call((u_long)KEY_DECRYPT_PK, xdr_cryptkeyarg2, (char *)&arg, xdr_cryptkeyres, (char *)&res)) { return (-1); } if (res.status != KEY_SUCCESS) { debug("decrypt status is nonzero"); return (-1); } *deskey = res.cryptkeyres_u.deskey; return (0); } int key_encryptsession(remotename, deskey) const char *remotename; des_block *deskey; { cryptkeyarg arg; cryptkeyres res; arg.remotename = (char *) remotename; arg.deskey = *deskey; if (!key_call((u_long)KEY_ENCRYPT, xdr_cryptkeyarg, (char *)&arg, xdr_cryptkeyres, (char *)&res)) { return (-1); } if (res.status != KEY_SUCCESS) { debug("encrypt status is nonzero"); return (-1); } *deskey = res.cryptkeyres_u.deskey; return (0); } int key_decryptsession(remotename, deskey) const char *remotename; des_block *deskey; { cryptkeyarg arg; cryptkeyres res; arg.remotename = (char *) remotename; arg.deskey = *deskey; if (!key_call((u_long)KEY_DECRYPT, xdr_cryptkeyarg, (char *)&arg, xdr_cryptkeyres, (char *)&res)) { return (-1); } if (res.status != KEY_SUCCESS) { debug("decrypt status is nonzero"); return (-1); } *deskey = res.cryptkeyres_u.deskey; return (0); } int key_gendes(key) des_block *key; { if (!key_call((u_long)KEY_GEN, xdr_void, (char *)NULL, xdr_des_block, (char *)key)) { return (-1); } return (0); } int key_setnet(arg) struct netstarg *arg; { keystatus status; if (!key_call((u_long) KEY_NET_PUT, xdr_key_netstarg, (char *) arg, xdr_keystatus, (char *) &status)){ return (-1); } if (status != KEY_SUCCESS) { debug("key_setnet status is nonzero"); return (-1); } return (1); } int key_get_conv(pkey, deskey) char *pkey; des_block *deskey; { cryptkeyres res; if (!key_call((u_long) KEY_GET_CONV, xdr_keybuf, pkey, xdr_cryptkeyres, (char *)&res)) { return (-1); } if (res.status != KEY_SUCCESS) { debug("get_conv status is nonzero"); return (-1); } *deskey = res.cryptkeyres_u.deskey; return (0); } struct key_call_private { CLIENT *client; /* Client handle */ pid_t pid; /* process-id at moment of creation */ uid_t uid; /* user-id at last authorization */ }; static struct key_call_private *key_call_private_main = NULL; #ifdef foo static void key_call_destroy(void *vp) { register struct key_call_private *kcp = (struct key_call_private *)vp; if (kcp) { if (kcp->client) clnt_destroy(kcp->client); free(kcp); } } #endif /* * Keep the handle cached. This call may be made quite often. */ static CLIENT * getkeyserv_handle(vers) int vers; { struct key_call_private *kcp = key_call_private_main; struct timeval wait_time; int fd; struct sockaddr_un name; int namelen = sizeof(struct sockaddr_un); #define TOTAL_TIMEOUT 30 /* total timeout talking to keyserver */ #define TOTAL_TRIES 5 /* Number of tries */ if (kcp == (struct key_call_private *)NULL) { kcp = (struct key_call_private *)malloc(sizeof (*kcp)); if (kcp == (struct key_call_private *)NULL) { return ((CLIENT *) NULL); } key_call_private_main = kcp; kcp->client = NULL; } /* if pid has changed, destroy client and rebuild */ if (kcp->client != NULL && kcp->pid != getpid()) { clnt_destroy(kcp->client); kcp->client = NULL; } if (kcp->client != NULL) { /* if other side closed socket, build handle again */ clnt_control(kcp->client, CLGET_FD, (char *)&fd); if (getpeername(fd,(struct sockaddr *)&name,&namelen) == -1) { auth_destroy(kcp->client->cl_auth); clnt_destroy(kcp->client); kcp->client = NULL; } } if (kcp->client != NULL) { /* if uid has changed, build client handle again */ if (kcp->uid != geteuid()) { kcp->uid = geteuid(); auth_destroy(kcp->client->cl_auth); kcp->client->cl_auth = authsys_create("", kcp->uid, 0, 0, NULL); if (kcp->client->cl_auth == NULL) { clnt_destroy(kcp->client); kcp->client = NULL; return ((CLIENT *) NULL); } } /* Change the version number to the new one */ clnt_control(kcp->client, CLSET_VERS, (void *)&vers); return (kcp->client); } if ((kcp->client == (CLIENT *) NULL)) /* Use the AF_UNIX transport */ kcp->client = clnt_create("/var/run/keyservsock", KEY_PROG, vers, "unix"); if (kcp->client == (CLIENT *) NULL) { return ((CLIENT *) NULL); } kcp->uid = geteuid(); kcp->pid = getpid(); kcp->client->cl_auth = authsys_create("", kcp->uid, 0, 0, NULL); if (kcp->client->cl_auth == NULL) { clnt_destroy(kcp->client); kcp->client = NULL; return ((CLIENT *) NULL); } wait_time.tv_sec = TOTAL_TIMEOUT/TOTAL_TRIES; wait_time.tv_usec = 0; (void) clnt_control(kcp->client, CLSET_RETRY_TIMEOUT, (char *)&wait_time); if (clnt_control(kcp->client, CLGET_FD, (char *)&fd)) _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ return (kcp->client); } /* returns 0 on failure, 1 on success */ static int key_call(proc, xdr_arg, arg, xdr_rslt, rslt) u_long proc; xdrproc_t xdr_arg; char *arg; xdrproc_t xdr_rslt; char *rslt; { CLIENT *clnt; struct timeval wait_time; if (proc == KEY_ENCRYPT_PK && __key_encryptsession_pk_LOCAL) { cryptkeyres *res; res = (*__key_encryptsession_pk_LOCAL)(geteuid(), arg); *(cryptkeyres*)rslt = *res; return (1); } else if (proc == KEY_DECRYPT_PK && __key_decryptsession_pk_LOCAL) { cryptkeyres *res; res = (*__key_decryptsession_pk_LOCAL)(geteuid(), arg); *(cryptkeyres*)rslt = *res; return (1); } else if (proc == KEY_GEN && __key_gendes_LOCAL) { des_block *res; res = (*__key_gendes_LOCAL)(geteuid(), 0); *(des_block*)rslt = *res; return (1); } if ((proc == KEY_ENCRYPT_PK) || (proc == KEY_DECRYPT_PK) || (proc == KEY_NET_GET) || (proc == KEY_NET_PUT) || (proc == KEY_GET_CONV)) clnt = getkeyserv_handle(2); /* talk to version 2 */ else clnt = getkeyserv_handle(1); /* talk to version 1 */ if (clnt == NULL) { return (0); } wait_time.tv_sec = TOTAL_TIMEOUT; wait_time.tv_usec = 0; if (clnt_call(clnt, proc, xdr_arg, arg, xdr_rslt, rslt, wait_time) == RPC_SUCCESS) { return (1); } else { return (0); } }
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