diplodocus.org Git - nmh/blob - sbr/ruserpass.c

   1 /*
   2  * Portions of this code are
   3  * Copyright (c) 1985 Regents of the University of California.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms are permitted
   7  * provided that the above copyright notice and this paragraph are
   8  * duplicated in all such forms and that any documentation,
   9  * advertising materials, and other materials related to such
  10  * distribution and use acknowledge that the software was developed
  11  * by the University of California, Berkeley.  The name of the
  12  * University may not be used to endorse or promote products derived
  13  * from this software without specific prior written permission.
  14  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  17  *
  18  * $Id$
  19  */
  20
  21 #include <h/mh.h>
  22 #include <pwd.h>
  23 #include <errno.h>
  24
  25 static FILE *cfile;
  26
  27 #ifndef MAXHOSTNAMELEN
  28 # define MAXHOSTNAMELEN 64
  29 #endif
  30
  31 #define DEFAULT 1
  32 #define LOGIN   2
  33 #define PASSWD  3
  34 #define ACCOUNT 4
  35 #define MACDEF  5
  36 #define ID      10
  37 #define MACH    11
  38
  39 static char tokval[100];
  40
  41 struct toktab {
  42     char *tokstr;
  43     int tval;
  44 };
  45
  46 static struct toktab toktabs[] = {
  47     { "default",  DEFAULT },
  48     { "login",    LOGIN },
  49     { "password", PASSWD },
  50     { "passwd",   PASSWD },
  51     { "account",  ACCOUNT },
  52     { "machine",  MACH },
  53     { "macdef",   MACDEF },
  54     { 0,          0 }
  55 };
  56
  57 /*
  58  * prototypes
  59  */
  60 static int token(void);
  61
  62
  63 int
  64 ruserpass(char *host, char **aname, char **apass)
  65 {
  66     char *hdir, buf[BUFSIZ];
  67     int t, usedefault = 0;
  68     struct stat stb;
  69
  70     hdir = getenv("HOME");
  71     if (hdir == NULL)
  72         hdir = ".";
  73     snprintf(buf, sizeof(buf), "%s/.netrc", hdir);
  74     cfile = fopen(buf, "r");
  75     if (cfile == NULL) {
  76         if (errno != ENOENT)
  77             perror(buf);
  78         goto done;
  79     }
  80
  81     while ((t = token())) {
  82         switch(t) {
  83         case DEFAULT:
  84             usedefault = 1;
  85             /* FALL THROUGH */
  86
  87         case MACH:
  88             if (!usedefault) {
  89                 if (token() != ID)
  90                     continue;
  91                 /*
  92                  * Allow match either for user's host name.
  93                  */
  94                 if (strcasecmp(host, tokval) == 0)
  95                     goto match;
  96                 continue;
  97             }
  98 match:
  99             while ((t = token()) && t != MACH && t != DEFAULT) {
 100                 switch(t) {
 101                 case LOGIN:
 102                     if (token() && *aname == 0) {
 103                         *aname = malloc((size_t) strlen(tokval) + 1);
 104                         strcpy(*aname, tokval);
 105                     }
 106                     break;
 107                 case PASSWD:
 108                     if (fstat(fileno(cfile), &stb) >= 0 &&
 109                         (stb.st_mode & 077) != 0) {
 110                         fprintf(stderr, "Error - .netrc file not correct mode.\n");
 111                         fprintf(stderr, "Remove password or correct mode.\n");
 112                         goto bad;
 113                     }
 114                     if (token() && *apass == 0) {
 115                         *apass = malloc((size_t) strlen(tokval) + 1);
 116                         strcpy(*apass, tokval);
 117                     }
 118                     break;
 119                 case ACCOUNT:
 120                     break;
 121
 122                 case MACDEF:
 123                     goto done_close;
 124                     break;
 125                 default:
 126                     fprintf(stderr, "Unknown .netrc keyword %s\n", tokval);
 127                     break;
 128                 }
 129             }
 130             goto done;
 131         }
 132     }
 133
 134 done_close:
 135     fclose(cfile);
 136
 137 done:
 138     if (!*aname) {
 139         char tmp[80];
 140         char *myname;
 141
 142         if ((myname = getlogin()) == NULL) {
 143             struct passwd *pp;
 144
 145             if ((pp = getpwuid (getuid())) != NULL)
 146                 myname = pp->pw_name;
 147         }
 148         printf("Name (%s:%s): ", host, myname);
 149
 150         fgets(tmp, sizeof(tmp) - 1, stdin);
 151         tmp[strlen(tmp) - 1] = '\0';
 152         if (*tmp != '\0') {
 153             myname = tmp;
 154         }
 155
 156         *aname = malloc((size_t) strlen(myname) + 1);
 157         strcpy (*aname, myname);
 158     }
 159
 160     if (!*apass) {
 161         char prompt[256];
 162         char *mypass;
 163
 164         snprintf(prompt, sizeof(prompt), "Password (%s:%s): ", host, *aname);
 165         mypass = nmh_getpass(prompt);
 166
 167         if (*mypass == '\0') {
 168             mypass = *aname;
 169         }
 170
 171         *apass = malloc((size_t) strlen(mypass) + 1);
 172         strcpy (*apass, mypass);
 173     }
 174
 175     return(0);
 176 bad:
 177     fclose(cfile);
 178     return(-1);
 179 }
 180
 181 static int
 182 token(void)
 183 {
 184     char *cp;
 185     int c;
 186     struct toktab *t;
 187
 188     if (feof(cfile))
 189         return (0);
 190     while ((c = getc(cfile)) != EOF &&
 191            (c == '\n' || c == '\t' || c == ' ' || c == ','))
 192         continue;
 193     if (c == EOF)
 194         return (0);
 195     cp = tokval;
 196     if (c == '"') {
 197         while ((c = getc(cfile)) != EOF && c != '"') {
 198             if (c == '\\')
 199                 c = getc(cfile);
 200             *cp++ = c;
 201         }
 202     } else {
 203         *cp++ = c;
 204         while ((c = getc(cfile)) != EOF
 205                && c != '\n' && c != '\t' && c != ' ' && c != ',') {
 206             if (c == '\\')
 207                 c = getc(cfile);
 208             *cp++ = c;
 209         }
 210     }
 211     *cp = 0;
 212     if (tokval[0] == 0)
 213         return (0);
 214     for (t = toktabs; t->tokstr; t++)
 215         if (!strcmp(t->tokstr, tokval))
 216             return (t->tval);
 217     return (ID);
 218 }