This commit was manufactured by cvs2svn to create branch

'GNUPG-1-9-BRANCH'.

1 files changed, 638 insertions, 0 deletions

diff --git a/scd/scdaemon.c b/scd/scdaemon.c
new file mode 100644
index 000000000..8e0ef37c9
--- /dev/null
+++ b/scd/scdaemon.c
@@ -0,0 +1,638 @@
+/* scdaemon.c  -  The GnuPG Smartcard Daemon
+ *	Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <time.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <signal.h>
+
+#define JNLIB_NEED_LOG_LOGV
+#include "scdaemon.h"
+#include <ksba.h>
+#include <gcrypt.h>
+
+#include <assuan.h> /* malloc hooks */
+
+#include "i18n.h"
+#include "sysutils.h"
+
+
+
+enum cmd_and_opt_values 
+{ aNull = 0,
+  oCsh		  = 'c',
+  oQuiet	  = 'q',
+  oSh		  = 's',
+  oVerbose	  = 'v',
+  
+  oNoVerbose = 500,
+  oOptions,
+  oDebug,
+  oDebugAll,
+  oDebugWait,
+  oDebugSC,
+  oNoGreeting,
+  oNoOptions,
+  oHomedir,
+  oNoDetach,
+  oNoGrab,
+  oLogFile,
+  oServer,
+  oDaemon,
+  oBatch,
+  oReaderPort,
+
+aTest };
+
+
+
+static ARGPARSE_OPTS opts[] = {
+  
+  { 301, NULL, 0, N_("@Options:\n ") },
+
+  { oServer,   "server",     0, N_("run in server mode (foreground)") },
+  { oDaemon,   "daemon",     0, N_("run in daemon mode (background)") },
+  { oVerbose, "verbose",   0, N_("verbose") },
+  { oQuiet,	"quiet",     0, N_("be somewhat more quiet") },
+  { oSh,	"sh",        0, N_("sh-style command output") },
+  { oCsh,	"csh",       0, N_("csh-style command output") },
+  { oOptions, "options"  , 2, N_("read options from file")},
+  { oDebug,	"debug"     ,4|16, N_("set debugging flags")},
+  { oDebugAll, "debug-all" ,0, N_("enable full debugging")},
+  { oDebugWait,"debug-wait",1, "@"},
+  { oDebugSC,  "debug-sc",  1, N_("|N|set OpenSC debug level to N")},
+  { oNoDetach, "no-detach" ,0, N_("do not detach from the console")},
+  { oLogFile,  "log-file"   ,2, N_("use a log file for the server")},
+  { oReaderPort, "reader-port", 1, N_("|N|connect to reader at port N")},
+
+  {0}
+};
+
+
+static volatile int caught_fatal_sig = 0;
+
+/* It is possible that we are currently running under setuid permissions */
+static int maybe_setuid = 1;
+
+/* Name of the communication socket */
+static char socket_name[128];
+
+static const char *
+my_strusage (int level)
+{
+  const char *p;
+  switch (level)
+    {
+    case 11: p = "scdaemon (GnuPG)";
+      break;
+    case 13: p = VERSION; break;
+    case 17: p = PRINTABLE_OS_NAME; break;
+    case 19: p = _("Please report bugs to <" PACKAGE_BUGREPORT ">.\n");
+      break;
+    case 1:
+    case 40: p =  _("Usage: scdaemon [options] (-h for help)");
+      break;
+    case 41: p =  _("Syntax: scdaemon [options] [command [args]]\n"
+                    "Smartcard daemon for GnuPG\n");
+    break;
+    
+    default: p = NULL;
+    }
+  return p;
+}
+
+
+
+static void
+i18n_init (void)
+{
+#ifdef USE_SIMPLE_GETTEXT
+    set_gettext_file( PACKAGE );
+#else
+#ifdef ENABLE_NLS
+    setlocale (LC_ALL, "");
+    bindtextdomain (PACKAGE, LOCALEDIR);
+    textdomain (PACKAGE);
+#endif
+#endif
+}
+
+
+
+/* Used by gcry for logging */
+static void
+my_gcry_logger (void *dummy, int level, const char *fmt, va_list arg_ptr)
+{
+  /* translate the log levels */
+  switch (level)
+    {
+    case GCRY_LOG_CONT: level = JNLIB_LOG_CONT; break;
+    case GCRY_LOG_INFO: level = JNLIB_LOG_INFO; break;
+    case GCRY_LOG_WARN: level = JNLIB_LOG_WARN; break;
+    case GCRY_LOG_ERROR:level = JNLIB_LOG_ERROR; break;
+    case GCRY_LOG_FATAL:level = JNLIB_LOG_FATAL; break;
+    case GCRY_LOG_BUG:  level = JNLIB_LOG_BUG; break;
+    case GCRY_LOG_DEBUG:level = JNLIB_LOG_DEBUG; break;
+    default:            level = JNLIB_LOG_ERROR; break;  
+    }
+  log_logv (level, fmt, arg_ptr);
+}
+
+
+static void
+cleanup (void)
+{
+  if (*socket_name)
+    {
+      char *p;
+
+      remove (socket_name);
+      p = strrchr (socket_name, '/');
+      if (p)
+        {
+          *p = 0;
+          rmdir (socket_name);
+          *p = '/';
+        }
+      *socket_name = 0;
+    }
+}
+
+
+static RETSIGTYPE
+cleanup_sh (int sig)
+{
+  if (caught_fatal_sig)
+    raise (sig);
+  caught_fatal_sig = 1;
+
+  /* gcry_control( GCRYCTL_TERM_SECMEM );*/
+  cleanup ();
+
+#ifndef HAVE_DOSISH_SYSTEM
+  {	/* reset action to default action and raise signal again */
+    struct sigaction nact;
+    nact.sa_handler = SIG_DFL;
+    sigemptyset( &nact.sa_mask );
+    nact.sa_flags = 0;
+    sigaction( sig, &nact, NULL);
+  }
+#endif
+  raise( sig );
+}
+
+int
+main (int argc, char **argv )
+{
+  ARGPARSE_ARGS pargs;
+  int orig_argc;
+  int may_coredump;
+  char **orig_argv;
+  FILE *configfp = NULL;
+  char *configname = NULL;
+  const char *shell;
+  unsigned configlineno;
+  int parse_debug = 0;
+  int default_config =1;
+  int greeting = 0;
+  int nogreeting = 0;
+  int pipe_server = 0;
+  int is_daemon = 0;
+  int nodetach = 0;
+  int csh_style = 0;
+  char *logfile = NULL;
+  int debug_wait = 0;
+  int reader_port = 32768; /* First USB reader. */
+
+  set_strusage (my_strusage);
+  gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN);
+  /* Please note that we may running SUID(ROOT), so be very CAREFUL
+     when adding any stuff between here and the call to INIT_SECMEM()
+     somewhere after the option parsing */
+  log_set_prefix ("scdaemon", 1|4); 
+  i18n_init ();
+
+  /* check that the libraries are suitable.  Do it here because
+     the option parsing may need services of the library */
+  if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) )
+    {
+      log_fatal( _("libgcrypt is too old (need %s, have %s)\n"),
+                 NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
+    }
+
+  ksba_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
+  assuan_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
+  gcry_set_log_handler (my_gcry_logger, NULL);
+  gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
+
+  may_coredump = disable_core_dumps ();
+
+  shell = getenv ("SHELL");
+  if (shell && strlen (shell) >= 3 && !strcmp (shell+strlen (shell)-3, "csh") )
+    csh_style = 1;
+  
+  /* FIXME: Using this homedir option does only make sense when not
+     running as a system service.  We might want to check for this by
+     looking at the uid or ebtter use an explict option for this */
+  opt.homedir = getenv("GNUPGHOME");
+  if (!opt.homedir || !*opt.homedir)
+    opt.homedir = GNUPG_DEFAULT_HOMEDIR;
+
+  /* check whether we have a config file on the commandline */
+  orig_argc = argc;
+  orig_argv = argv;
+  pargs.argc = &argc;
+  pargs.argv = &argv;
+  pargs.flags= 1|(1<<6);  /* do not remove the args, ignore version */
+  while (arg_parse( &pargs, opts))
+    {
+      if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
+        parse_debug++;
+      else if (pargs.r_opt == oOptions)
+        { /* yes there is one, so we do not try the default one, but
+	     read the option file when it is encountered at the
+	     commandline */
+          default_config = 0;
+	}
+	else if (pargs.r_opt == oNoOptions)
+          default_config = 0; /* --no-options */
+	else if (pargs.r_opt == oHomedir)
+          opt.homedir = pargs.r.ret_str;
+    }
+
+  /* initialize the secure memory. */
+  gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
+  maybe_setuid = 0;
+
+  /* 
+     Now we are working under our real uid 
+  */
+
+
+  if (default_config)
+    configname = make_filename (opt.homedir, "scdaemon.conf", NULL );
+  
+  argc = orig_argc;
+  argv = orig_argv;
+  pargs.argc = &argc;
+  pargs.argv = &argv;
+  pargs.flags=  1;  /* do not remove the args */
+ next_pass:
+  if (configname)
+    {
+      configlineno = 0;
+      configfp = fopen (configname, "r");
+      if (!configfp)
+        {
+          if (default_config)
+            {
+              if( parse_debug )
+                log_info (_("NOTE: no default option file `%s'\n"),
+                          configname );
+	    }
+          else
+            {
+              log_error (_("option file `%s': %s\n"),
+                         configname, strerror(errno) );
+              exit(2);
+	    }
+          xfree (configname); 
+          configname = NULL;
+	}
+      if (parse_debug && configname )
+        log_info (_("reading options from `%s'\n"), configname );
+      default_config = 0;
+    }
+
+  while (optfile_parse( configfp, configname, &configlineno, &pargs, opts) )
+    {
+      switch (pargs.r_opt)
+        {
+        case oQuiet: opt.quiet = 1; break;
+        case oVerbose: opt.verbose++; break;
+        case oBatch: opt.batch=1; break;
+
+        case oDebug: opt.debug |= pargs.r.ret_ulong; break;
+        case oDebugAll: opt.debug = ~0; break;
+        case oDebugWait: debug_wait = pargs.r.ret_int; break;
+        case oDebugSC: opt.debug_sc = pargs.r.ret_int; break;
+
+        case oOptions:
+          /* config files may not be nested (silently ignore them) */
+          if (!configfp)
+            {
+		xfree(configname);
+		configname = xstrdup(pargs.r.ret_str);
+		goto next_pass;
+	    }
+          break;
+        case oNoGreeting: nogreeting = 1; break;
+        case oNoVerbose: opt.verbose = 0; break;
+        case oNoOptions: break; /* no-options */
+        case oHomedir: opt.homedir = pargs.r.ret_str; break;
+        case oNoDetach: nodetach = 1; break;
+        case oLogFile: logfile = pargs.r.ret_str; break;
+        case oCsh: csh_style = 1; break;
+        case oSh: csh_style = 0; break;
+        case oServer: pipe_server = 1; break;
+        case oDaemon: is_daemon = 1; break;
+
+        case oReaderPort: reader_port = pargs.r.ret_int; break;
+
+        default : pargs.err = configfp? 1:2; break;
+	}
+    }
+  if (configfp)
+    {
+      fclose( configfp );
+      configfp = NULL;
+      xfree(configname);
+      configname = NULL;
+      goto next_pass;
+    }
+  xfree (configname);
+  configname = NULL;
+  if (log_get_errorcount(0))
+    exit(2);
+  if (nogreeting )
+    greeting = 0;
+
+  if (greeting)
+    {
+      fprintf (stderr, "%s %s; %s\n",
+                 strusage(11), strusage(13), strusage(14) );
+      fprintf (stderr, "%s\n", strusage(15) );
+    }
+#ifdef IS_DEVELOPMENT_VERSION
+  log_info ("NOTE: this is a development version!\n");
+#endif
+
+  
+  if (atexit (cleanup))
+    {
+      log_error ("atexit failed\n");
+      cleanup ();
+      exit (1);
+    }
+
+  
+  if (debug_wait && pipe_server)
+    {
+      log_debug ("waiting for debugger - my pid is %u .....\n",
+                 (unsigned int)getpid());
+      sleep (debug_wait);
+      log_debug ("... okay\n");
+    }
+  
+  /* now start with logging to a file if this is desired */
+  if (logfile)
+    {
+      log_set_file (logfile);
+      log_set_prefix (NULL, 1|2|4);
+    }
+
+
+  if (pipe_server)
+    { /* this is the simple pipe based server */
+      scd_command_handler (-1);
+    }
+  else if (!is_daemon)
+    {
+      log_info (_("please use the option `--daemon'"
+                  " to run the program in the background\n"));
+    }
+  else
+    { /* regular server mode */
+      int fd;
+      pid_t pid;
+      int i;
+      int len;
+      struct sockaddr_un serv_addr;
+      char *p;
+
+      /* fixme: if there is already a running gpg-agent we should
+         share the same directory - and vice versa */
+      *socket_name = 0;
+      snprintf (socket_name, DIM(socket_name)-1,
+                "/tmp/gpg-XXXXXX/S.scdaemon");
+      socket_name[DIM(socket_name)-1] = 0;
+      p = strrchr (socket_name, '/');
+      if (!p)
+        BUG ();
+      *p = 0;;
+      if (!mkdtemp(socket_name))
+        {
+          log_error ("can't create directory `%s': %s\n",
+	             socket_name, strerror(errno) );
+          exit (1);
+        }
+      *p = '/';
+
+      if (strchr (socket_name, ':') )
+        {
+          log_error ("colons are not allowed in the socket name\n");
+          exit (1);
+        }
+      if (strlen (socket_name)+1 >= sizeof serv_addr.sun_path ) 
+        {
+          log_error ("name of socket to long\n");
+          exit (1);
+        }
+   
+
+      fd = socket (AF_UNIX, SOCK_STREAM, 0);
+      if (fd == -1)
+        {
+          log_error ("can't create socket: %s\n", strerror(errno) );
+          exit (1);
+        }
+
+      memset (&serv_addr, 0, sizeof serv_addr);
+      serv_addr.sun_family = AF_UNIX;
+      strcpy (serv_addr.sun_path, socket_name);
+      len = (offsetof (struct sockaddr_un, sun_path)
+             + strlen(serv_addr.sun_path) + 1);
+
+      if (bind (fd, (struct sockaddr*)&serv_addr, len) == -1)
+        {
+          log_error ("error binding socket to `%s': %s\n",
+                     serv_addr.sun_path, strerror (errno) );
+          close (fd);
+          exit (1);
+        }
+  
+      if (listen (fd, 5 ) == -1)
+        {
+          log_error ("listen() failed: %s\n", strerror (errno));
+          close (fd);
+          exit (1);
+        }
+
+      if (opt.verbose)
+        log_info ("listening on socket `%s'\n", socket_name );
+
+
+      fflush (NULL);
+      pid = fork ();
+      if (pid == (pid_t)-1) 
+        {
+          log_fatal ("fork failed: %s\n", strerror (errno) );
+          exit (1);
+        }
+      else if (pid) 
+        { /* we are the parent */
+          char *infostr;
+          
+          close (fd);
+          
+          /* create the info string: <name>:<pid>:<protocol_version> */
+          if (asprintf (&infostr, "SCDAEMON_INFO=%s:%lu:1",
+                        socket_name, (ulong)pid ) < 0)
+            {
+              log_error ("out of core\n");
+              kill (pid, SIGTERM);
+              exit (1);
+            }
+          *socket_name = 0; /* don't let cleanup() remove the socket -
+                               the child should do this from now on */
+          if (argc) 
+            { /* run the program given on the commandline */
+              if (putenv (infostr))
+                {
+                  log_error ("failed to set environment: %s\n",
+                             strerror (errno) );
+                  kill (pid, SIGTERM );
+                  exit (1);
+                }
+              execvp (argv[0], argv);
+              log_error ("failed to run the command: %s\n", strerror (errno));
+              kill (pid, SIGTERM);
+              exit (1);
+            }
+          else
+            {
+              /* print the environment string, so that the caller can use
+                 shell's eval to set it */
+              if (csh_style)
+                {
+                  *strchr (infostr, '=') = ' ';
+                  printf ( "setenv %s\n", infostr);
+                }
+              else
+                {
+                  printf ( "%s; export SCDAEMON_INFO;\n", infostr);
+                }
+              free (infostr);
+              exit (0); 
+            }
+          /* NOTREACHED */
+        } /* end parent */
+      
+      /* this is the child */
+
+      /* detach from tty and put process into a new session */
+      if (!nodetach )
+        {  /* close stdin, stdout and stderr unless it is the log stream */
+          for (i=0; i <= 2; i++) 
+            {
+              if ( log_get_fd () != i)
+                close (i);
+            }
+          if (setsid() == -1)
+            {
+              log_error ("setsid() failed: %s\n", strerror(errno) );
+              cleanup ();
+              exit (1);
+            }
+        }
+
+      /* setup signals */
+      {
+        struct sigaction oact, nact;
+        
+        nact.sa_handler = cleanup_sh;
+        sigemptyset (&nact.sa_mask);
+        nact.sa_flags = 0;
+        
+        sigaction (SIGHUP, NULL, &oact);
+        if (oact.sa_handler != SIG_IGN)
+          sigaction (SIGHUP, &nact, NULL);
+        sigaction( SIGTERM, NULL, &oact );
+        if (oact.sa_handler != SIG_IGN)
+          sigaction (SIGTERM, &nact, NULL);
+        nact.sa_handler = SIG_IGN;
+        sigaction (SIGPIPE, &nact, NULL);
+        sigaction (SIGINT, &nact, NULL);
+      }
+
+      if (chdir("/"))
+        {
+          log_error ("chdir to / failed: %s\n", strerror (errno));
+          exit (1);
+        }
+
+      scd_command_handler (fd);
+
+      close (fd);
+    }
+  
+  return 0;
+}
+
+void
+scd_exit (int rc)
+{
+  #if 0
+#warning no update_random_seed_file
+  update_random_seed_file();
+  #endif
+#if 0
+  /* at this time a bit annoying */
+  if (opt.debug & DBG_MEMSTAT_VALUE)
+    {
+      gcry_control( GCRYCTL_DUMP_MEMORY_STATS );
+      gcry_control( GCRYCTL_DUMP_RANDOM_STATS );
+    }
+  if (opt.debug)
+    gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
+#endif
+  gcry_control (GCRYCTL_TERM_SECMEM );
+  rc = rc? rc : log_get_errorcount(0)? 2 : 0;
+  exit (rc);
+}
+
+
+void
+scd_init_default_ctrl (CTRL ctrl)
+{
+
+}
+