1 files changed, 363 insertions, 0 deletions
diff --git a/sunrpc/key_call.c b/sunrpc/key_call.c
new file mode 100644
index 0000000000..ba1c2638fb
--- /dev/null
+++ b/sunrpc/key_call.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright (c) 1988 by Sun Microsystems, Inc.
+ */
+/*
+ * 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
+ */
+
+/*
+ * The original source is from the RPCSRC 4.0 package from Sun Microsystems.
+ * The Interface to keyserver protocoll 2 was added by 
+ * Thorsten Kukuk <kukuk@vt.uni-paderborn.de>
+ */
+
+#include <stdio.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <rpc/rpc.h>
+#include <rpc/auth.h>
+#include <sys/wait.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <rpc/key_prot.h>
+
+#define KEY_TIMEOUT	5	/* per-try timeout in seconds */
+#define KEY_NRETRY	12	/* number of retries */
+
+#define debug(msg)		/* turn off debugging */
+
+extern int _openchild (char *command, FILE ** fto, FILE ** ffrom);
+
+
+static int key_call (u_long, xdrproc_t xdr_arg, char *,
+		     xdrproc_t xdr_rslt, char *);
+
+static struct timeval trytimeout = {KEY_TIMEOUT, 0};
+static struct timeval tottimeout = {KEY_TIMEOUT * KEY_NRETRY, 0};
+
+int
+key_setsecret (char *secretkey)
+{
+  keystatus status;
+
+  if (!key_call ((u_long) KEY_SET, (xdrproc_t) xdr_keybuf, secretkey, 
+		 (xdrproc_t) 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 (&kres, 0, sizeof (kres));
+  if (key_call ((u_long) KEY_NET_GET, (xdrproc_t) xdr_void, (char *) NULL,
+		(xdrproc_t) 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 (char *remotename, des_block * deskey)
+{
+  cryptkeyarg arg;
+  cryptkeyres res;
+
+  arg.remotename = remotename;
+  arg.deskey = *deskey;
+  if (!key_call ((u_long) KEY_ENCRYPT, (xdrproc_t) xdr_cryptkeyarg, 
+		 (char *) &arg, (xdrproc_t) 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 (char *remotename, des_block * deskey)
+{
+  cryptkeyarg arg;
+  cryptkeyres res;
+
+  arg.remotename = remotename;
+  arg.deskey = *deskey;
+  if (!key_call ((u_long) KEY_DECRYPT, (xdrproc_t) xdr_cryptkeyarg,
+		 (char *) &arg, (xdrproc_t) 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_pk (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, (xdrproc_t) xdr_cryptkeyarg2, 
+		 (char *) &arg, (xdrproc_t) 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 (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, (xdrproc_t) xdr_cryptkeyarg2, 
+		 (char *) &arg, (xdrproc_t) 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 (des_block * key)
+{
+  struct sockaddr_in sin;
+  CLIENT *client;
+  int socket;
+  enum clnt_stat stat;
+
+  sin.sin_family = AF_INET;
+  sin.sin_port = 0;
+  sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+  bzero (sin.sin_zero, sizeof (sin.sin_zero));
+  socket = RPC_ANYSOCK;
+  client = clntudp_bufcreate (&sin, (u_long) KEY_PROG, (u_long) KEY_VERS,
+			      trytimeout, &socket, RPCSMALLMSGSIZE,
+			      RPCSMALLMSGSIZE);
+  if (client == NULL)
+    return -1;
+
+  stat = clnt_call (client, KEY_GEN, (xdrproc_t) xdr_void, NULL,
+		    (xdrproc_t) xdr_des_block, (caddr_t) key, tottimeout);
+  clnt_destroy (client);
+  close (socket);
+  if (stat != RPC_SUCCESS)
+    return -1;
+
+  return 0;
+}
+
+int
+key_setnet (struct key_netstarg *arg)
+{
+  keystatus status;
+
+  if (!key_call ((u_long) KEY_NET_PUT, (xdrproc_t) xdr_key_netstarg, 
+		 (char *) arg,(xdrproc_t) xdr_keystatus, (char *) &status))
+    return -1;
+
+  if (status != KEY_SUCCESS)
+    {
+      debug ("key_setnet status is nonzero");
+      return -1;
+    }
+  return 1;
+}
+
+int
+key_get_conv (char *pkey, des_block * deskey)
+{
+  cryptkeyres res;
+
+  if (!key_call ((u_long) KEY_GET_CONV, (xdrproc_t) xdr_keybuf, pkey,
+		 (xdrproc_t) 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;
+}
+
+/*
+ * 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) (uid_t, char *) = 0;
+cryptkeyres *(*__key_decryptsession_pk_LOCAL) (uid_t, char *) = 0;
+des_block *(*__key_gendes_LOCAL) (uid_t, char *) = 0;
+
+static int
+key_call (u_long proc, xdrproc_t xdr_arg, char *arg,
+	  xdrproc_t xdr_rslt, char *rslt)
+{
+  XDR xdrargs;
+  XDR xdrrslt;
+  FILE *fargs;
+  FILE *frslt;
+  void (*osigchild) (int);
+  union wait status;
+  int pid;
+  int success;
+  uid_t ruid;
+  uid_t euid;
+  static char MESSENGER[] = "/usr/etc/keyenvoy";
+
+  success = 1;
+  osigchild = signal (SIGCHLD, SIG_IGN);
+
+  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;
+    }
+
+  /*
+   * We are going to exec a set-uid program which makes our effective uid
+   * zero, and authenticates us with our real uid. We need to make the
+   * effective uid be the real uid for the setuid program, and
+   * the real uid be the effective uid so that we can change things back.
+   */
+  euid = geteuid ();
+  ruid = getuid ();
+  setreuid (euid, ruid);
+  pid = _openchild (MESSENGER, &fargs, &frslt);
+  setreuid (ruid, euid);
+  if (pid < 0)
+    {
+      debug ("open_streams");
+      return (0);
+    }
+  xdrstdio_create (&xdrargs, fargs, XDR_ENCODE);
+  xdrstdio_create (&xdrrslt, frslt, XDR_DECODE);
+
+  if (!xdr_u_long (&xdrargs, &proc) || !(*xdr_arg) (&xdrargs, arg))
+    {
+      debug ("xdr args");
+      success = 0;
+    }
+  fclose (fargs);
+
+  if (success && !(*xdr_rslt) (&xdrrslt, rslt))
+    {
+      debug ("xdr rslt");
+      success = 0;
+    }
+
+#ifdef NOTDEF
+  /*
+   * WARNING! XXX
+   * The original code appears first.  wait4 returns only after the process
+   * with the requested pid terminates.  The effect of using wait() instead
+   * has not been determined.
+   */
+  fclose (frslt);
+  if (wait4 (pid, &status, 0, NULL) < 0 || status.w_retcode != 0)
+    {
+      debug ("wait4");
+      success = 0;
+    }
+#endif /* def NOTDEF */
+  if (wait (&status) < 0 || status.w_retcode != 0)
+    {
+      debug ("wait");
+      success = 0;
+    }
+  signal (SIGCHLD, osigchild);
+
+  return (success);
+}