Mix/Src/main.c

/* Mixmaster version 3  --  (C) 1999 Anonymizer Inc.

   Mixmaster may be redistributed and modified under certain conditions.
   This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
   ANY KIND, either express or implied. See the file COPYRIGHT for
   details.

   Command-line based frontend
   $Id: main.c,v 1.21 2002/09/18 23:26:16 rabbi Exp $ */


#include "mix3.h"
#include "pgp.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#ifdef POSIX
#include <unistd.h>
#else /* end of POSIX */
#include <io.h>
#endif /* else if not POSIX */

static char *largopt(char *p, char *opt, char *name, int *error);
static void noarg(char *name, char p);
static int check_get_pass(int force);

/** main *****************************************************************/

/* Returns:
 0 successful operation
 1 command line error
 2 client error condition */

#ifdef WIN32SERVICE
int mix_main(int argc, char *argv[])
#else
int main(int argc, char *argv[])
#endif /* WIN32SERVICE */
{
  int error = 0, deflt = 1, help = 0, readmail = 0, send = -1, sendpool = 0,
  header = 1, maint = 0, keygen = 0, verbose = 2, sign = 0, encrypt = 0;
  int daemon = 0, type_list = 0, nodetach = 0;

#ifdef USE_SOCK
  int pop3 = 0;

#endif /* USE_SOCK */
  char *filename = NULL;
  int i;
  int ret = 0;
  char *p, *q;
  char chain[1024] = "";
  char nym[LINELEN] = "";
  BUFFER *nymopt, *pseudonym, *attachments;
  int numcopies = 0;            /* default value set in mix.cfg */
  BUFFER *msg, *chainlist, *field, *content;
  FILE *f;

  mix_init(NULL);

  msg = buf_new();
  chainlist = buf_new();
  nymopt = buf_new();
  pseudonym = buf_new();
  attachments = buf_new();
  field = buf_new();
  content = buf_new();

#ifdef USE_NCURSES
  if (argc == 1) {
    if (isatty(fileno(stdin)))
      menu_main();
    else
      menu_folder(0, NULL);
    goto end;
  }
#endif /* USE_NCURSES */
  if (argc > 1 && strleft(argv[1], "-f")) {
    menu_folder(strlen(argv[1]) > 2 ? argv[1][2] : 0,
                argc < 3 ? NULL : argv[2]);
    goto end;
  }
  for (i = 1; i < argc; i++) {
    p = argv[i];
    if (p[0] == '-' && p[1] != '\0') {
      if (p[1] == '-') {
        p += 2;
        if (strieq(p, "help"))
          help = 1, deflt = 0;
        else if (streq(p, "verbose"))
          verbose = 1;
        else if (streq(p, "type-list"))
          type_list = 1;
        else if (streq(p, "dummy"))
          send = MSG_NULL, deflt = 0;
        else if (streq(p, "remailer"))
          maint = 1, deflt = 0;
        else if (streq(p, "generate-key"))
          keygen = 2, deflt = 0;
        else if (streq(p, "update-keys"))
          keygen = 1, deflt = 0;
        else if (streq(p, "send"))
          sendpool = 1, deflt = 0;
        else if (streq(p, "read-mail"))
          readmail = 1, deflt = 0;
        else if (streq(p, "store-mail"))
          readmail = 2, deflt = 0;
#ifdef USE_SOCK
        else if (streq(p, "pop-mail"))
          pop3 = 1, deflt = 0;
#endif /* USE_SOCK */
        else if (streq(p, "daemon"))
          daemon = 1, deflt = 0;
        else if (streq(p, "no-detach"))
          nodetach = 1;
        else if (streq(p, "post"))
          send = MSG_POST;
        else if (streq(p, "mail"))
          send = MSG_MAIL;
        else if (streq(p, "sign"))
          sign = 1;
        else if (streq(p, "encrypt"))
          encrypt = 1;
        else if ((q = largopt(p, "to", argv[0], &error)) != NULL) {
          header = 0;
          buf_appendf(msg, "To: %s\n", q);
        } else if ((q = largopt(p, "post-to", argv[0], &error)) != NULL) {
          send = MSG_POST, header = 0;
          buf_appendf(msg, "Newsgroups: %s\n", q);
        } else if ((q = largopt(p, "subject", argv[0], &error)) != NULL) {
          buf_appendf(msg, "Subject: %s\n", q);
        } else if ((q = largopt(p, "header", argv[0], &error)) != NULL) {
          buf_appendf(msg, "%s\n", q);
        } else if ((q = largopt(p, "chain", argv[0], &error)) != NULL) {
          buf_appendf(msg, "Chain: %s\n", q);
        }
#ifdef USE_PGP 
        else if ((q = largopt(p, "reply-chain", argv[0], &error)) != NULL) {
          buf_appendf(msg, "Reply-Chain: %s\n", q);
        } else if ((q = largopt(p, "latency", argv[0], &error)) != NULL) {
          buf_appendf(msg, "Latency: %s\n", q);
        } else if ((q = largopt(p, "attachment", argv[0], &error)) != NULL) {
          buf_appendf(attachments, "%s\n", q);
        } else if ((q = largopt(p, "nym-config", argv[0], &error)) != NULL) {
          deflt = 0;
          strncpy(nym, q, sizeof(nym));
          if (i > argc && strileft(argv[i + 1], "name="))
            buf_sets(pseudonym, argv[++i] + 5);
          else if (i > argc && strileft(argv[i + 1], "opt="))
            buf_appends(nymopt, argv[++i] + 5);
        } else if ((q = largopt(p, "nym", argv[0], &error)) != NULL) {
          buf_appendf(msg, "Nym: %s\n", q);
        }
#endif /* USE_PGP */
        else if ((q = largopt(p, "copies", argv[0], &error)) != NULL) {
          sscanf(q, "%d", &numcopies);
        } else if (error == 0 && mix_configline(p) == 0) {
          fprintf(stderr, "%s: Invalid option %s\n", argv[0], argv[i]);
          error = 1;
        }
      } else {
        while (*++p) {
          switch (*p) {
          case 'd':
            send = MSG_NULL, deflt = 0;
            break;
          case 'R':
            readmail = 1, deflt = 0;
            break;
          case 'I':
            readmail = 2, deflt = 0;
            break;
          case 'S':
            sendpool = 1, deflt = 0;
            break;
          case 'M':
            maint = 1, deflt = 0;
            break;
#ifdef USE_SOCK
          case 'P':
            pop3 = 1, deflt = 0;
            break;
#endif /* USE_SOCK */
          case 'D':
            daemon = 1, deflt = 0;
            break;
          case 'G':
            keygen = 2, deflt = 0;
            break;
          case 'K':
            keygen = 1, deflt = 0;
            break;
          case 'L':             /* backwards compatibility */
            break;
          case 'v':
            verbose = 1;
            break;
          case 'h':
            help = 1, deflt = 0;
            break;
          case 'T':
            type_list = 1;
            break;
          case 't':
            if (*(p + 1) == 'o')
              p++;
            header = 0;
            if (i < argc - 1)
              buf_appendf(msg, "To: %s\n", argv[++i]);
            else {
              fprintf(stderr, "%s: Missing argument for option -to\n",
                      argv[0]);
              error = 1;
            }
            break;
          case 's':
            if (i < argc - 1)
              buf_appendf(msg, "Subject: %s\n", argv[++i]);
            else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
          case 'l':
            if (i < argc - 1)
              buf_appendf(msg, "Chain: %s\n", argv[++i]);
            else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
          case 'r':
            if (i < argc - 1)
              buf_appendf(msg, "Reply-Chain: %s\n", argv[++i]);
            else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
#ifdef USE_PGP
          case 'n':
            if (i < argc - 1)
              buf_appendf(msg, "Nym: %s\n", argv[++i]);
            else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
#endif /* USE_PGP */
          case 'c':
            if (i < argc - 1)
              sscanf(argv[++i], "%d", &numcopies);
            else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
          case 'p':
            send = MSG_POST;
            break;
          case 'g':
            if (i < argc - 1) {
              send = MSG_POST, header = 0;
              buf_appendf(msg, "Newsgroups: %s\n", argv[++i]);
            } else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
          case 'a':
            if (i < argc - 1)
              buf_appendf(attachments, "%s\n", argv[++i]);
            else {
              noarg(argv[0], *p);
              error = 1;
            }
            break;
          case 'm':
            send = MSG_MAIL;
            break;
          default:
            fprintf(stderr, "%s: Invalid option -%c\n", argv[0], *p);
            error = 1;
            break;
          }
        }
      }
    } else {
      if (strchr(argv[i], '@')) {
        header = 0;
        buf_appendf(msg, "To: %s\n", argv[i]);
      } else {
        if (filename == NULL)
          filename = argv[i];
        else {
          fprintf(stderr, "%s: Error in command line: %s\n", argv[0], argv[i]);
          error = 1;
        }
      }
    }
  }

  if (error) {
    ret = 1;
    goto end;
  }
  if (type_list) {
    BUFFER *type2list;
    type2list = buf_new();
    if (prepare_type2list(type2list) < 0) {
      fprintf(stderr, "Cannot print type2.list.\n");
      ret = 2;
    } else {
      printf("%s", type2list->data);
    };
    buf_free(type2list);
    goto end;
  }
  if (help || (isatty(fileno(stdin)) && isatty(fileno(stdout))))
    fprintf(stderr, "Mixmaster %s - %s\n", VERSION, COPYRIGHT);

  if (help) {
    printf("Usage: %s [options] [user@host] [filename]\n\n", argv[0]);
    printf("Options:\n\
\n\
-h, --help                        summary of command line options\n\
-T, --type-list                   list available remailers\n\
-t, --to=user@host                the recipient's address(es)\n\
-g, --post-to=newsgroup           newsgroup(s) to post to\n\
-p, --post                        input is a Usenet article\n\
-m, --mail                        input is a mail message\n\
-s, --subject=subject             message subject\n\
    --header='header line'        arbitrary message headers\n\
-a, --attachment=file             attach a file\n"
#ifdef USE_PGP
           "-n, --nym=yournym                 use pseudonym to send the message\n\
    --encrypt                     encrypt the message using the PGP format\n\
    --sign                        sign the message using the PGP format\n"
#endif /* USE_PGP */
           "-l, --chain=mix1,mix2,mix3,...    specify a remailer chain\n\
-c, --copies=num                  send num copies to increase reliability\n\
-d, --dummy                       generate a dummy message\n\
-S, --send                        send the message(s) in the pool\n"
#ifdef USE_PGP
           "    --nym-config=yournym          generate a new pseudonym\n\
    --latency=hours               reply chain latency\n\
    --reply-chain=rem1,rem2,...   reply chain for the pseudonym\n"
#endif /* USE_PGP */
           "-v, --verbose                     output informational messages\n\
-f [file]                         read a mail folder\n"
#ifndef USE_NCURSES
           "\n-fr, -ff, -fg [file]              send reply/followup/group reply to a message\n"
#endif /* USE_NCURSES */
           "\nThe input file is expected to contain mail headers if no address is\n\
specified in the command line.\n\
\n\
Remailer:\n\
\n\
-R, --read-mail                   read remailer message from stdin\n\
-I, --store-mail                  read remailer msg from stdin, do not decrypt\n\
-M, --remailer                    process the remailer pool\n\
-D, --daemon                      remailer as background process\n\
    --no-detach                   do not detach from terminal as daemon\n"
#ifdef USE_SOCK
           "-S, --send                        force sending messages from the pool\n"
#endif /* USE_SOCK */
           "-P, --pop-mail                    force getting messages from POP3 servers\n\
-G, --generate-key                generate a new remailer key\n\
-K, --update-keys                 generate remailer keys if necessary\n"
#ifdef WIN32SERVICE
           "\n\
WinNT service:\n\
\n\
    --install-svc                 install the service\n\
    --remove-svc                  remove the service\n\
    --run-svc                     run as a service\n"
#endif /* WIN32SERVICE */
    );

    ret = 0;
    goto end;
  }
  if (deflt && send == -1)
    send = MSG_MAIL;
  if (nym[0] != 0)
    send = -1;
  if ((send == MSG_MAIL || send == MSG_POST) && filename == NULL &&
      header == 1 && isatty(fileno(stdin))) {
    /* we don't get here if USE_NCURSES is set */
    printf("Run `%s -h' to view a summary of the command line options.\n\nEnter the message, complete with headers.\n",
           argv[0]);
#ifdef UNIX
    printf("When done, press ^D.\n\n");
#else
    printf("When done, press ^Z.\n\n");
#endif /* else not UNIX */
  }
  if (header == 0)
    buf_nl(msg);

  if (readmail || send == MSG_MAIL || send == MSG_POST) {
    if (filename == NULL || streq(filename, "-"))
      f = stdin;
    else {
      f = fopen(filename, "r");
      if (f == NULL)
        fprintf(stderr, "Can't open %s.\n", filename);
    }

    if (f && buf_read(msg, f) != -1) {
      if (readmail == 1) {
        check_get_pass(1);
        mix_decrypt(msg);
      } else if (readmail == 2)
        pool_add(msg, "inf");
      if (send == MSG_MAIL || send == MSG_POST) {
        BUFFER *sendmsg;
        int numdest = 0;

        sendmsg = buf_new();

        while (buf_getheader(msg, field, content) == 0) {
          if (bufieq(field, "nym")) {
            strncpy(nym, content->data, sizeof(nym));
          } else if (bufieq(field, "chain"))
            if (strchr(content->data, ';')) {
              i = strchr(content->data, ';') - (char *)content->data;
              strncpy(chain, content->data, i);
              if (strstr(content->data + i, "copies=") != NULL) {
                sscanf(strstr(content->data + i, "copies=") +
                       sizeof("copies=") - 1, "%d", &numcopies);
              }
            } else
              strncpy(chain, content->data, sizeof(chain));
          else {                /* line goes into message */
            if ((send == MSG_MAIL && bufieq(field, "to"))
                || (send == MSG_POST && bufieq(field, "newsgroups")))
              numdest++;
            if (bufieq(field, "from"))
              fprintf(stderr, "Warning: The message has a From: line.\n");
            buf_appendheader(sendmsg, field, content);
          }
        }
        buf_nl(sendmsg);
        buf_rest(sendmsg, msg);

        while (buf_getline(attachments, field) != -1)
          if (attachfile(sendmsg, field) == -1) {
            errlog(ERRORMSG, "Can't attach %b!\n", field);
            ret = 2;
            goto end;
          }

#ifdef USE_PGP
        if (nym[0] != 0 && strchr(nym, '@') == NULL)
          strcatn(nym, "@", sizeof(nym));
        if (sign || encrypt) {
          BUFFER *pass;

          pass = buf_new();
          user_pass(pass);
          if (pgp_mailenc((encrypt ? PGP_ENCRYPT : 0) |
                          (nym[0] != 0 && sign ? PGP_SIGN : 0) |
                          PGP_TEXT | PGP_REMAIL, sendmsg, nym,
                          pass, NULL, NYMSECRING) != 0) {
            fprintf(stderr, "Encryption failed: missing key!");
            ret = 2;
            goto end;
          }
          buf_free(pass);
        }
        if (nym[0] != 0) {
          if (nym_encrypt(sendmsg, nym, send) == 0)
            send = MSG_MAIL;
          else
            fprintf(stderr, "Nym error, sending message anonymously.\n");
        }
#endif /* USE_PGP */
        if (numdest == 0) {
          fprintf(stderr, "No destination address given!\n");
          ret = 2;
        } else if (numcopies < 0 || numcopies > 10) {
          fprintf(stderr, "Invalid number of copies!\n");
          ret = 2;
        } else {
          if (mix_encrypt(send, sendmsg, chain, numcopies,
                          chainlist) == -1) {
            ret = 2;
            if (chainlist->length)
              fprintf(stderr, "%s\n", chainlist->data);
            else
              fprintf(stderr, "Failed!\n");
          } else if (verbose) {
            fprintf(stderr, "Chain: ");
            buf_write(chainlist, stderr);
          }
        }

        buf_free(sendmsg);
      }
      if (filename != NULL)
        fclose(f);
    } else
      ret = 2;
  }
  if (send == MSG_NULL) {
    if (msg->length) {
      while (buf_getheader(msg, field, content) == 0) {
        if (bufieq(field, "chain"))
          strncpy(chain, content->data, sizeof(chain));
      }
    }
    if (mix_encrypt(MSG_NULL, NULL, chain, numcopies, chainlist) == -1) {
      ret = 2;
      if (chainlist->length)
        fprintf(stderr, "%s\n", chainlist->data);
      else
        fprintf(stderr, "Failed!\n");
    } else if (verbose) {
      fprintf(stderr, "Chain: ");
      buf_write(chainlist, stderr);
    }
  }
#ifdef USE_PGP
  if (nym[0] != 0) {
    char nymserver[LINELEN] = "*";
    BUFFER *chains;

    chains = buf_new();
    if (numcopies < 1 || numcopies > 10)
      numcopies = 1;
    while (buf_getheader(msg, field, content) != -1) {
      if (bufieq(field, "chain"))
        strncpy(chain, content->data, sizeof(chain));
      else if (bufieq(field, "reply-chain"))
        buf_appendf(chains, "Chain: %b\n", content);
      else if (field->length)
        buf_appendheader(chains, field, content);
      else
        buf_nl(chains);
    }
    if (strrchr(nym, '@')) {
      strncpy(nymserver, strrchr(nym, '@'), sizeof(nymserver));
      *strrchr(nym, '@') = '\0';
    }
    if (nym_config(NYM_CREATE, nym, nymserver, pseudonym,
                   chain, numcopies, chains, nymopt) < 0) {
      ret = 2;
      fprintf(stderr, "Failed!\n");
    }
    user_delpass();
    buf_free(chains);
  }
#endif /* USE_PGP */

  if (keygen) {
    check_get_pass(0);
    keymgt(keygen);
  }
  if (sendpool)
    mix_send();
#ifdef USE_SOCK
  if (pop3)
    pop3get();
#endif /* USE_SOCK */
  if (maint) {
    check_get_pass(1);
    mix_regular(0);
  }

end:
  buf_free(field);
  buf_free(content);
  buf_free(chainlist);
  buf_free(msg);
  buf_free(nymopt);
  buf_free(pseudonym);
  buf_free(attachments);

  if (daemon) {
    check_get_pass(1);
#ifdef UNIX
    if (! nodetach) {
      int pid;

      fprintf(stderr, "Detaching.\n");
      /* Detach as suggested by the Unix Programming FAQ */
      pid = fork();
      if (pid > 0)
        exit(0);
      if (setsid() < 0) {
        /* This should never happen. */
        fprintf(stderr, "setsid() failed.\n");
        exit(1);
      };
      pid = fork();
      if (pid > 0)
        exit(0);
      if (chdir(MIXDIR) < 0) {
        if (chdir("/") < 0) {
          fprintf(stderr, "Cannot chdir to mixdir or /.\n");
          exit(1);
        };
      };
      if (write_pidfile(PIDFILE)) {
        fprintf(stderr, "Aborting.\n");
        exit(1);
      }
      freopen ("/dev/null", "r", stdin);
      freopen ("/dev/null", "w", stdout);
      freopen ("/dev/null", "w", stderr);
    }
#endif /* UNIX */
    mix_daemon();
#ifdef UNIX 
/* ifdef this one to, so that we do not need to export it from windows dll */
    clear_pidfile(PIDFILE);
#endif /* UNIX */
  }
  mix_exit();
  return (ret);
}

static char *largopt(char *p, char *opt, char *name, int *error)
{
  if (streq(p, opt)) {
    fprintf(stderr, "%s: Missing argument for option --%s\n", name, p);
    *error = 1;
  } else if (strleft(p, opt) && p[strlen(opt)] == '=') {
    return (p + strlen(opt) + 1);
  }
  return (NULL);
}

static void noarg(char *name, char p)
{
  fprintf(stderr, "%s: Missing argument for option -%c\n", name, p);
}

static int check_get_pass(int force)
/* get a passphrase and check against keys
 * if force != 0 passphrase must match with some key */
{
    BUFFER *pass, *pass2, *key;
    int n = 0;

    if (PASSPHRASE[0] == '\0' && isatty(fileno(stdin))) {
      pass = buf_new();
      pass2 = buf_new();
      key = buf_new();
      buf_sets(pass, PASSPHRASE);
      while (pgpdb_getkey(PK_DECRYPT, PGP_ES_RSA, NULL, NULL, NULL, NULL, NULL,
                           NULL, NULL, NULL, pass) < 0 &&
             pgpdb_getkey(PK_DECRYPT, PGP_E_ELG,  NULL, NULL, NULL, NULL, NULL,
                           NULL, NULL, NULL, pass) < 0 &&
             getv2seckey(NULL, key) < 0)
      {
        user_delpass();
        if (n)
          fprintf(stderr, "re-");
        user_pass(pass);
        strncpy(PASSPHRASE, pass->data, LINELEN);
        PASSPHRASE[LINELEN-1] = 0;
        if (!force) {
          if (n && buf_eq(pass, pass2))
            break;
          buf_set(pass2, pass);
        }
        n=1;
      }
      user_delpass();
      buf_free(pass);
      buf_free(pass2);
      buf_free(key);

      strncpy(ENTEREDPASSPHRASE, PASSPHRASE, LINELEN);
      ENTEREDPASSPHRASE[LINELEN-1] = 0;
    }
    return 1;
}
1	rabbi	1	/* Mixmaster version 3 -- (C) 1999 Anonymizer Inc.
2
3			Mixmaster may be redistributed and modified under certain conditions.
4			This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
5			ANY KIND, either express or implied. See the file COPYRIGHT for
6			details.
7
8			Command-line based frontend
9	rabbi	262	$Id: main.c,v 1.21 2002/09/18 23:26:16 rabbi Exp $ */
10	rabbi	1
11
12			#include "mix3.h"
13	rabbi	186	#include "pgp.h"
14	rabbi	1	#include <stdio.h>
15			#include <string.h>
16			#include <ctype.h>
17	weaselp	120	#include <stdlib.h>
18	rabbi	1	#ifdef POSIX
19			#include <unistd.h>
20	rabbi	262	#else /* end of POSIX */
21	rabbi	1	#include <io.h>
22	rabbi	262	#endif /* else if not POSIX */
23	rabbi	1
24			static char largopt(char p, char opt, char name, int *error);
25			static void noarg(char *name, char p);
26	weaselp	194	static int check_get_pass(int force);
27	rabbi	1
28			/ main ***************************************************************/
29
30			/* Returns:
31			0 successful operation
32			1 command line error
33			2 client error condition */
34
35	rabbi	30	#ifdef WIN32SERVICE
36			int mix_main(int argc, char *argv[])
37			#else
38	rabbi	1	int main(int argc, char *argv[])
39	rabbi	262	#endif /* WIN32SERVICE */
40	rabbi	1	{
41			int error = 0, deflt = 1, help = 0, readmail = 0, send = -1, sendpool = 0,
42			header = 1, maint = 0, keygen = 0, verbose = 2, sign = 0, encrypt = 0;
43	weaselp	177	int daemon = 0, type_list = 0, nodetach = 0;
44	rabbi	1
45			#ifdef USE_SOCK
46			int pop3 = 0;
47
48	rabbi	262	#endif /* USE_SOCK */
49	rabbi	1	char *filename = NULL;
50			int i;
51			int ret = 0;
52			char p, q;
53			char chain[1024] = "";
54			char nym[LINELEN] = "";
55			BUFFER nymopt, pseudonym, *attachments;
56			int numcopies = 0; /* default value set in mix.cfg */
57			BUFFER msg, chainlist, field, content;
58			FILE *f;
59
60			mix_init(NULL);
61
62			msg = buf_new();
63			chainlist = buf_new();
64			nymopt = buf_new();
65			pseudonym = buf_new();
66			attachments = buf_new();
67			field = buf_new();
68			content = buf_new();
69
70			#ifdef USE_NCURSES
71			if (argc == 1) {
72			if (isatty(fileno(stdin)))
73			menu_main();
74			else
75			menu_folder(0, NULL);
76			goto end;
77			}
78	rabbi	262	#endif /* USE_NCURSES */
79	rabbi	1	if (argc > 1 && strleft(argv[1], "-f")) {
80			menu_folder(strlen(argv[1]) > 2 ? argv[1][2] : 0,
81			argc < 3 ? NULL : argv[2]);
82			goto end;
83			}
84			for (i = 1; i < argc; i++) {
85			p = argv[i];
86			if (p[0] == '-' && p[1] != '\0') {
87			if (p[1] == '-') {
88			p += 2;
89			if (strieq(p, "help"))
90			help = 1, deflt = 0;
91			else if (streq(p, "verbose"))
92			verbose = 1;
93			else if (streq(p, "type-list"))
94			type_list = 1;
95			else if (streq(p, "dummy"))
96			send = MSG_NULL, deflt = 0;
97			else if (streq(p, "remailer"))
98			maint = 1, deflt = 0;
99			else if (streq(p, "generate-key"))
100			keygen = 2, deflt = 0;
101			else if (streq(p, "update-keys"))
102			keygen = 1, deflt = 0;
103			else if (streq(p, "send"))
104			sendpool = 1, deflt = 0;
105			else if (streq(p, "read-mail"))
106			readmail = 1, deflt = 0;
107	rabbi	147	else if (streq(p, "store-mail"))
108			readmail = 2, deflt = 0;
109	rabbi	1	#ifdef USE_SOCK
110			else if (streq(p, "pop-mail"))
111			pop3 = 1, deflt = 0;
112	rabbi	262	#endif /* USE_SOCK */
113	rabbi	1	else if (streq(p, "daemon"))
114			daemon = 1, deflt = 0;
115	weaselp	177	else if (streq(p, "no-detach"))
116			nodetach = 1;
117	rabbi	1	else if (streq(p, "post"))
118			send = MSG_POST;
119			else if (streq(p, "mail"))
120			send = MSG_MAIL;
121			else if (streq(p, "sign"))
122			sign = 1;
123			else if (streq(p, "encrypt"))
124			encrypt = 1;
125			else if ((q = largopt(p, "to", argv[0], &error)) != NULL) {
126			header = 0;
127			buf_appendf(msg, "To: %s\n", q);
128			} else if ((q = largopt(p, "post-to", argv[0], &error)) != NULL) {
129			send = MSG_POST, header = 0;
130			buf_appendf(msg, "Newsgroups: %s\n", q);
131			} else if ((q = largopt(p, "subject", argv[0], &error)) != NULL) {
132			buf_appendf(msg, "Subject: %s\n", q);
133			} else if ((q = largopt(p, "header", argv[0], &error)) != NULL) {
134			buf_appendf(msg, "%s\n", q);
135			} else if ((q = largopt(p, "chain", argv[0], &error)) != NULL) {
136			buf_appendf(msg, "Chain: %s\n", q);
137			}
138	rabbi	262	#ifdef USE_PGP
139	rabbi	1	else if ((q = largopt(p, "reply-chain", argv[0], &error)) != NULL) {
140			buf_appendf(msg, "Reply-Chain: %s\n", q);
141			} else if ((q = largopt(p, "latency", argv[0], &error)) != NULL) {
142			buf_appendf(msg, "Latency: %s\n", q);
143			} else if ((q = largopt(p, "attachment", argv[0], &error)) != NULL) {
144			buf_appendf(attachments, "%s\n", q);
145			} else if ((q = largopt(p, "nym-config", argv[0], &error)) != NULL) {
146			deflt = 0;
147			strncpy(nym, q, sizeof(nym));
148			if (i > argc && strileft(argv[i + 1], "name="))
149			buf_sets(pseudonym, argv[++i] + 5);
150			else if (i > argc && strileft(argv[i + 1], "opt="))
151			buf_appends(nymopt, argv[++i] + 5);
152			} else if ((q = largopt(p, "nym", argv[0], &error)) != NULL) {
153			buf_appendf(msg, "Nym: %s\n", q);
154			}
155	rabbi	262	#endif /* USE_PGP */
156	rabbi	1	else if ((q = largopt(p, "copies", argv[0], &error)) != NULL) {
157			sscanf(q, "%d", &numcopies);
158			} else if (error == 0 && mix_configline(p) == 0) {
159			fprintf(stderr, "%s: Invalid option %s\n", argv[0], argv[i]);
160			error = 1;
161			}
162			} else {
163			while (*++p) {
164			switch (*p) {
165			case 'd':
166			send = MSG_NULL, deflt = 0;
167			break;
168			case 'R':
169			readmail = 1, deflt = 0;
170			break;
171	rabbi	147	case 'I':
172			readmail = 2, deflt = 0;
173			break;
174	rabbi	1	case 'S':
175			sendpool = 1, deflt = 0;
176			break;
177			case 'M':
178			maint = 1, deflt = 0;
179			break;
180			#ifdef USE_SOCK
181			case 'P':
182			pop3 = 1, deflt = 0;
183			break;
184	rabbi	262	#endif /* USE_SOCK */
185	rabbi	1	case 'D':
186			daemon = 1, deflt = 0;
187			break;
188			case 'G':
189			keygen = 2, deflt = 0;
190			break;
191			case 'K':
192			keygen = 1, deflt = 0;
193			break;
194			case 'L': /* backwards compatibility */
195			break;
196			case 'v':
197			verbose = 1;
198			break;
199			case 'h':
200			help = 1, deflt = 0;
201			break;
202			case 'T':
203			type_list = 1;
204			break;
205			case 't':
206			if (*(p + 1) == 'o')
207			p++;
208			header = 0;
209			if (i < argc - 1)
210			buf_appendf(msg, "To: %s\n", argv[++i]);
211			else {
212			fprintf(stderr, "%s: Missing argument for option -to\n",
213			argv[0]);
214			error = 1;
215			}
216			break;
217			case 's':
218			if (i < argc - 1)
219			buf_appendf(msg, "Subject: %s\n", argv[++i]);
220			else {
221			noarg(argv[0], *p);
222			error = 1;
223			}
224			break;
225			case 'l':
226			if (i < argc - 1)
227			buf_appendf(msg, "Chain: %s\n", argv[++i]);
228			else {
229			noarg(argv[0], *p);
230			error = 1;
231			}
232			break;
233			case 'r':
234			if (i < argc - 1)
235	weaselp	120	buf_appendf(msg, "Reply-Chain: %s\n", argv[++i]);
236	rabbi	1	else {
237			noarg(argv[0], *p);
238			error = 1;
239			}
240			break;
241			#ifdef USE_PGP
242			case 'n':
243			if (i < argc - 1)
244			buf_appendf(msg, "Nym: %s\n", argv[++i]);
245			else {
246			noarg(argv[0], *p);
247			error = 1;
248			}
249			break;
250	rabbi	262	#endif /* USE_PGP */
251	rabbi	1	case 'c':
252			if (i < argc - 1)
253			sscanf(argv[++i], "%d", &numcopies);
254			else {
255			noarg(argv[0], *p);
256			error = 1;
257			}
258			break;
259			case 'p':
260			send = MSG_POST;
261			break;
262			case 'g':
263			if (i < argc - 1) {
264			send = MSG_POST, header = 0;
265			buf_appendf(msg, "Newsgroups: %s\n", argv[++i]);
266			} else {
267			noarg(argv[0], *p);
268			error = 1;
269			}
270	weaselp	69	break;
271	rabbi	1	case 'a':
272			if (i < argc - 1)
273			buf_appendf(attachments, "%s\n", argv[++i]);
274			else {
275			noarg(argv[0], *p);
276			error = 1;
277			}
278	weaselp	69	break;
279	rabbi	1	case 'm':
280			send = MSG_MAIL;
281			break;
282			default:
283			fprintf(stderr, "%s: Invalid option -%c\n", argv[0], *p);
284			error = 1;
285			break;
286			}
287			}
288			}
289			} else {
290			if (strchr(argv[i], '@')) {
291			header = 0;
292			buf_appendf(msg, "To: %s\n", argv[i]);
293			} else {
294			if (filename == NULL)
295			filename = argv[i];
296			else {
297			fprintf(stderr, "%s: Error in command line: %s\n", argv[0], argv[i]);
298			error = 1;
299			}
300			}
301			}
302			}
303
304			if (error) {
305			ret = 1;
306			goto end;
307			}
308			if (type_list) {
309	weaselp	168	BUFFER *type2list;
310			type2list = buf_new();
311			if (prepare_type2list(type2list) < 0) {
312	rabbi	101	fprintf(stderr, "Cannot print type2.list.\n");
313			ret = 2;
314	weaselp	168	} else {
315			printf("%s", type2list->data);
316			};
317			buf_free(type2list);
318	rabbi	1	goto end;
319			}
320			if (help \|\| (isatty(fileno(stdin)) && isatty(fileno(stdout))))
321			fprintf(stderr, "Mixmaster %s - %s\n", VERSION, COPYRIGHT);
322
323			if (help) {
324			printf("Usage: %s [options] [user@host] [filename]\n\n", argv[0]);
325			printf("Options:\n\
326			\n\
327			-h, --help summary of command line options\n\
328			-T, --type-list list available remailers\n\
329			-t, --to=user@host the recipient's address(es)\n\
330			-g, --post-to=newsgroup newsgroup(s) to post to\n\
331			-p, --post input is a Usenet article\n\
332			-m, --mail input is a mail message\n\
333			-s, --subject=subject message subject\n\
334			--header='header line' arbitrary message headers\n\
335			-a, --attachment=file attach a file\n"
336			#ifdef USE_PGP
337			"-n, --nym=yournym use pseudonym to send the message\n\
338			--encrypt encrypt the message using the PGP format\n\
339			--sign sign the message using the PGP format\n"
340	rabbi	262	#endif /* USE_PGP */
341	rabbi	1	"-l, --chain=mix1,mix2,mix3,... specify a remailer chain\n\
342			-c, --copies=num send num copies to increase reliability\n\
343			-d, --dummy generate a dummy message\n\
344			-S, --send send the message(s) in the pool\n"
345			#ifdef USE_PGP
346			" --nym-config=yournym generate a new pseudonym\n\
347			--latency=hours reply chain latency\n\
348			--reply-chain=rem1,rem2,... reply chain for the pseudonym\n"
349	rabbi	262	#endif /* USE_PGP */
350	rabbi	1	"-v, --verbose output informational messages\n\
351			-f [file] read a mail folder\n"
352			#ifndef USE_NCURSES
353			"\n-fr, -ff, -fg [file] send reply/followup/group reply to a message\n"
354	rabbi	262	#endif /* USE_NCURSES */
355	rabbi	1	"\nThe input file is expected to contain mail headers if no address is\n\
356			specified in the command line.\n\
357			\n\
358			Remailer:\n\
359			\n\
360			-R, --read-mail read remailer message from stdin\n\
361	rabbi	147	-I, --store-mail read remailer msg from stdin, do not decrypt\n\
362	rabbi	1	-M, --remailer process the remailer pool\n\
363	weaselp	199	-D, --daemon remailer as background process\n\
364	weaselp	177	--no-detach do not detach from terminal as daemon\n"
365	rabbi	1	#ifdef USE_SOCK
366			"-S, --send force sending messages from the pool\n"
367	rabbi	262	#endif /* USE_SOCK */
368	rabbi	1	"-P, --pop-mail force getting messages from POP3 servers\n\
369			-G, --generate-key generate a new remailer key\n\
370	rabbi	30	-K, --update-keys generate remailer keys if necessary\n"
371			#ifdef WIN32SERVICE
372			"\n\
373			WinNT service:\n\
374			\n\
375	rabbi	37	--install-svc install the service\n\
376			--remove-svc remove the service\n\
377			--run-svc run as a service\n"
378	rabbi	262	#endif /* WIN32SERVICE */
379	rabbi	30	);
380	rabbi	1
381			ret = 0;
382			goto end;
383			}
384			if (deflt && send == -1)
385			send = MSG_MAIL;
386			if (nym[0] != 0)
387			send = -1;
388			if ((send == MSG_MAIL \|\| send == MSG_POST) && filename == NULL &&
389			header == 1 && isatty(fileno(stdin))) {
390			/* we don't get here if USE_NCURSES is set */
391			printf("Run `%s -h' to view a summary of the command line options.\n\nEnter the message, complete with headers.\n",
392			argv[0]);
393			#ifdef UNIX
394			printf("When done, press ^D.\n\n");
395			#else
396			printf("When done, press ^Z.\n\n");
397	rabbi	262	#endif /* else not UNIX */
398	rabbi	1	}
399			if (header == 0)
400			buf_nl(msg);
401
402			if (readmail \|\| send == MSG_MAIL \|\| send == MSG_POST) {
403			if (filename == NULL \|\| streq(filename, "-"))
404			f = stdin;
405			else {
406			f = fopen(filename, "r");
407			if (f == NULL)
408			fprintf(stderr, "Can't open %s.\n", filename);
409			}
410
411			if (f && buf_read(msg, f) != -1) {
412	weaselp	194	if (readmail == 1) {
413			check_get_pass(1);
414	rabbi	1	mix_decrypt(msg);
415	weaselp	194	} else if (readmail == 2)
416	rabbi	147	pool_add(msg, "inf");
417	rabbi	1	if (send == MSG_MAIL \|\| send == MSG_POST) {
418			BUFFER *sendmsg;
419			int numdest = 0;
420
421			sendmsg = buf_new();
422
423			while (buf_getheader(msg, field, content) == 0) {
424			if (bufieq(field, "nym")) {
425			strncpy(nym, content->data, sizeof(nym));
426			} else if (bufieq(field, "chain"))
427			if (strchr(content->data, ';')) {
428			i = strchr(content->data, ';') - (char *)content->data;
429			strncpy(chain, content->data, i);
430			if (strstr(content->data + i, "copies=") != NULL) {
431			sscanf(strstr(content->data + i, "copies=") +
432			sizeof("copies=") - 1, "%d", &numcopies);
433			}
434			} else
435			strncpy(chain, content->data, sizeof(chain));
436			else { /* line goes into message */
437			if ((send == MSG_MAIL && bufieq(field, "to"))
438			\|\| (send == MSG_POST && bufieq(field, "newsgroups")))
439			numdest++;
440			if (bufieq(field, "from"))
441			fprintf(stderr, "Warning: The message has a From: line.\n");
442			buf_appendheader(sendmsg, field, content);
443			}
444			}
445			buf_nl(sendmsg);
446			buf_rest(sendmsg, msg);
447
448			while (buf_getline(attachments, field) != -1)
449			if (attachfile(sendmsg, field) == -1) {
450			errlog(ERRORMSG, "Can't attach %b!\n", field);
451			ret = 2;
452			goto end;
453			}
454
455			#ifdef USE_PGP
456			if (nym[0] != 0 && strchr(nym, '@') == NULL)
457			strcatn(nym, "@", sizeof(nym));
458			if (sign \|\| encrypt) {
459			BUFFER *pass;
460
461			pass = buf_new();
462			user_pass(pass);
463			if (pgp_mailenc((encrypt ? PGP_ENCRYPT : 0) \|
464			(nym[0] != 0 && sign ? PGP_SIGN : 0) \|
465			PGP_TEXT \| PGP_REMAIL, sendmsg, nym,
466			pass, NULL, NYMSECRING) != 0) {
467			fprintf(stderr, "Encryption failed: missing key!");
468			ret = 2;
469			goto end;
470			}
471			buf_free(pass);
472			}
473			if (nym[0] != 0) {
474			if (nym_encrypt(sendmsg, nym, send) == 0)
475			send = MSG_MAIL;
476			else
477			fprintf(stderr, "Nym error, sending message anonymously.\n");
478			}
479	rabbi	262	#endif /* USE_PGP */
480	rabbi	1	if (numdest == 0) {
481			fprintf(stderr, "No destination address given!\n");
482			ret = 2;
483			} else if (numcopies < 0 \|\| numcopies > 10) {
484			fprintf(stderr, "Invalid number of copies!\n");
485			ret = 2;
486			} else {
487			if (mix_encrypt(send, sendmsg, chain, numcopies,
488			chainlist) == -1) {
489			ret = 2;
490			if (chainlist->length)
491			fprintf(stderr, "%s\n", chainlist->data);
492			else
493			fprintf(stderr, "Failed!\n");
494			} else if (verbose) {
495			fprintf(stderr, "Chain: ");
496			buf_write(chainlist, stderr);
497			}
498			}
499
500			buf_free(sendmsg);
501			}
502			if (filename != NULL)
503			fclose(f);
504			} else
505			ret = 2;
506			}
507			if (send == MSG_NULL) {
508			if (msg->length) {
509			while (buf_getheader(msg, field, content) == 0) {
510			if (bufieq(field, "chain"))
511			strncpy(chain, content->data, sizeof(chain));
512			}
513			}
514			if (mix_encrypt(MSG_NULL, NULL, chain, numcopies, chainlist) == -1) {
515			ret = 2;
516			if (chainlist->length)
517			fprintf(stderr, "%s\n", chainlist->data);
518			else
519			fprintf(stderr, "Failed!\n");
520			} else if (verbose) {
521			fprintf(stderr, "Chain: ");
522			buf_write(chainlist, stderr);
523			}
524			}
525			#ifdef USE_PGP
526			if (nym[0] != 0) {
527			char nymserver[LINELEN] = "*";
528			BUFFER *chains;
529
530			chains = buf_new();
531			if (numcopies < 1 \|\| numcopies > 10)
532			numcopies = 1;
533			while (buf_getheader(msg, field, content) != -1) {
534			if (bufieq(field, "chain"))
535			strncpy(chain, content->data, sizeof(chain));
536			else if (bufieq(field, "reply-chain"))
537			buf_appendf(chains, "Chain: %b\n", content);
538			else if (field->length)
539			buf_appendheader(chains, field, content);
540			else
541			buf_nl(chains);
542			}
543	weaselp	120	if (strrchr(nym, '@')) {
544			strncpy(nymserver, strrchr(nym, '@'), sizeof(nymserver));
545			*strrchr(nym, '@') = '\0';
546	rabbi	1	}
547			if (nym_config(NYM_CREATE, nym, nymserver, pseudonym,
548			chain, numcopies, chains, nymopt) < 0) {
549			ret = 2;
550			fprintf(stderr, "Failed!\n");
551			}
552			user_delpass();
553			buf_free(chains);
554			}
555	rabbi	262	#endif /* USE_PGP */
556	rabbi	1
557	weaselp	194	if (keygen) {
558			check_get_pass(0);
559	rabbi	1	keymgt(keygen);
560	weaselp	194	}
561	rabbi	1	if (sendpool)
562			mix_send();
563			#ifdef USE_SOCK
564			if (pop3)
565			pop3get();
566	rabbi	262	#endif /* USE_SOCK */
567	weaselp	194	if (maint) {
568			check_get_pass(1);
569	rabbi	1	mix_regular(0);
570	weaselp	194	}
571	rabbi	1
572			end:
573			buf_free(field);
574			buf_free(content);
575			buf_free(chainlist);
576			buf_free(msg);
577			buf_free(nymopt);
578			buf_free(pseudonym);
579			buf_free(attachments);
580
581			if (daemon) {
582	weaselp	194	check_get_pass(1);
583	rabbi	1	#ifdef UNIX
584	rabbi	186	if (! nodetach) {
585			int pid;
586	rabbi	1
587	weaselp	177	fprintf(stderr, "Detaching.\n");
588			/* Detach as suggested by the Unix Programming FAQ */
589			pid = fork();
590			if (pid > 0)
591			exit(0);
592			if (setsid() < 0) {
593			/* This should never happen. */
594			fprintf(stderr, "setsid() failed.\n");
595			exit(1);
596	weaselp	124	};
597	weaselp	177	pid = fork();
598			if (pid > 0)
599			exit(0);
600			if (chdir(MIXDIR) < 0) {
601			if (chdir("/") < 0) {
602			fprintf(stderr, "Cannot chdir to mixdir or /.\n");
603			exit(1);
604			};
605			};
606	weaselp	197	if (write_pidfile(PIDFILE)) {
607			fprintf(stderr, "Aborting.\n");
608			exit(1);
609			}
610	weaselp	177	freopen ("/dev/null", "r", stdin);
611			freopen ("/dev/null", "w", stdout);
612			freopen ("/dev/null", "w", stderr);
613			}
614	rabbi	262	#endif /* UNIX */
615	rabbi	1	mix_daemon();
616	rabbi	262	#ifdef UNIX
617			/* ifdef this one to, so that we do not need to export it from windows dll */
618	weaselp	197	clear_pidfile(PIDFILE);
619	rabbi	262	#endif /* UNIX */
620	rabbi	1	}
621			mix_exit();
622			return (ret);
623			}
624
625			static char largopt(char p, char opt, char name, int *error)
626			{
627			if (streq(p, opt)) {
628			fprintf(stderr, "%s: Missing argument for option --%s\n", name, p);
629			*error = 1;
630			} else if (strleft(p, opt) && p[strlen(opt)] == '=') {
631			return (p + strlen(opt) + 1);
632			}
633			return (NULL);
634			}
635
636			static void noarg(char *name, char p)
637			{
638			fprintf(stderr, "%s: Missing argument for option -%c\n", name, p);
639			}
640	weaselp	194
641			static int check_get_pass(int force)
642			/* get a passphrase and check against keys
643	rabbi	262	* if force != 0 passphrase must match with some key */
644	weaselp	194	{
645			BUFFER pass, pass2, *key;
646			int n = 0;
647
648	weaselp	196	if (PASSPHRASE[0] == '\0' && isatty(fileno(stdin))) {
649			pass = buf_new();
650			pass2 = buf_new();
651			key = buf_new();
652			buf_sets(pass, PASSPHRASE);
653	disastry	254	while (pgpdb_getkey(PK_DECRYPT, PGP_ES_RSA, NULL, NULL, NULL, NULL, NULL,
654	weaselp	196	NULL, NULL, NULL, pass) < 0 &&
655	disastry	254	pgpdb_getkey(PK_DECRYPT, PGP_E_ELG, NULL, NULL, NULL, NULL, NULL,
656	weaselp	196	NULL, NULL, NULL, pass) < 0 &&
657			getv2seckey(NULL, key) < 0)
658			{
659			user_delpass();
660			if (n)
661			fprintf(stderr, "re-");
662			user_pass(pass);
663			strncpy(PASSPHRASE, pass->data, LINELEN);
664			PASSPHRASE[LINELEN-1] = 0;
665			if (!force) {
666			if (n && buf_eq(pass, pass2))
667			break;
668			buf_set(pass2, pass);
669			}
670			n=1;
671			}
672			user_delpass();
673			buf_free(pass);
674			buf_free(pass2);
675			buf_free(key);
676	weaselp	194
677	weaselp	196	strncpy(ENTEREDPASSPHRASE, PASSPHRASE, LINELEN);
678			ENTEREDPASSPHRASE[LINELEN-1] = 0;
679	weaselp	194	}
680			return 1;
681			}