| 1 | /* |
| 2 | ** Copyright 1998 - 2005 Double Precision, Inc. See COPYING for |
| 3 | ** distribution information. |
| 4 | */ |
| 5 | |
| 6 | #if HAVE_CONFIG_H |
| 7 | #include "courier_auth_config.h" |
| 8 | #endif |
| 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <ctype.h> |
| 12 | #include <string.h> |
| 13 | #include <errno.h> |
| 14 | #include <unistd.h> |
| 15 | #include "numlib/numlib.h" |
| 16 | |
| 17 | #include "courierauth.h" |
| 18 | #include "authstaticlist.h" |
| 19 | #include "courierauthdebug.h" |
| 20 | |
| 21 | #include "authpipelib.h" |
| 22 | #include "authpiperc.h" |
| 23 | |
| 24 | extern int _authdaemondopasswd(int wrfd, int rdfd, char *buffer, int bufsiz); |
| 25 | extern int _authdaemondo(int wrfd, int rdfd, const char *authreq, |
| 26 | int (*func)(struct authinfo *, void *), void *arg); |
| 27 | extern int _auth_enumerate(int wrfd, int rdfd, |
| 28 | void(*cb_func)(const char *name, |
| 29 | uid_t uid, |
| 30 | gid_t gid, |
| 31 | const char *homedir, |
| 32 | const char *maildir, |
| 33 | const char *options, |
| 34 | void *void_arg), |
| 35 | void *void_arg); |
| 36 | |
| 37 | static int disabled_flag; |
| 38 | |
| 39 | /* modelled on auth_generic() in authdaemon.c */ |
| 40 | int auth_pipe(const char *service, const char *authtype, char *authdata, |
| 41 | int (*callback_func)(struct authinfo *, void *), |
| 42 | void *callback_arg) |
| 43 | { |
| 44 | char tbuf[NUMBUFSIZE]; |
| 45 | size_t l=strlen(service)+strlen(authtype)+strlen(authdata)+2; |
| 46 | char *n=libmail_str_size_t(l, tbuf); |
| 47 | char *buf=malloc(strlen(n)+l+20); |
| 48 | int rdfd, wrfd, rc; |
| 49 | |
| 50 | if (!buf) |
| 51 | return 1; |
| 52 | |
| 53 | if (disabled_flag) |
| 54 | { |
| 55 | free(buf); |
| 56 | return -1; |
| 57 | } |
| 58 | |
| 59 | strcat(strcat(strcpy(buf, "AUTH "), n), "\n"); |
| 60 | strcat(strcat(buf, service), "\n"); |
| 61 | strcat(strcat(buf, authtype), "\n"); |
| 62 | strcat(buf, authdata); |
| 63 | |
| 64 | if (getPipe(&rdfd, &wrfd)) |
| 65 | return 1; |
| 66 | rc=_authdaemondo(wrfd, rdfd, buf, callback_func, callback_arg); |
| 67 | free(buf); |
| 68 | if (rc > 0) closePipe(); |
| 69 | return rc; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | /* modelled on auth_getuserinfo() in preauthdaemon.c (but note first |
| 74 | * two args are reversed) */ |
| 75 | int auth_pipe_pre(const char *uid, const char *service, |
| 76 | int (*callback)(struct authinfo *, void *), |
| 77 | void *arg) |
| 78 | { |
| 79 | char *buf; |
| 80 | int rdfd, wrfd, rc; |
| 81 | |
| 82 | if (disabled_flag) |
| 83 | return -1; |
| 84 | |
| 85 | buf=malloc(strlen(service)+strlen(uid)+20); |
| 86 | if (!buf) |
| 87 | return 1; |
| 88 | |
| 89 | strcat(strcat(strcat(strcat(strcpy(buf, "PRE . "), service), " "), |
| 90 | uid), "\n"); |
| 91 | |
| 92 | if (getPipe(&rdfd, &wrfd)) |
| 93 | { |
| 94 | free(buf); |
| 95 | return 1; |
| 96 | } |
| 97 | rc=_authdaemondo(wrfd, rdfd, buf, callback, arg); |
| 98 | free(buf); |
| 99 | if (rc > 0) closePipe(); |
| 100 | return (rc); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | /* modelled on auth_passwd() in authmoduser2.c */ |
| 105 | int auth_pipe_chgpwd(const char *service, |
| 106 | const char *uid, |
| 107 | const char *opwd, |
| 108 | const char *npwd) |
| 109 | { |
| 110 | char *buf; |
| 111 | int rdfd, wrfd, rc; |
| 112 | |
| 113 | if (disabled_flag) |
| 114 | return -1; |
| 115 | |
| 116 | buf=malloc(strlen(service)+strlen(uid)+strlen(opwd)+ |
| 117 | strlen(npwd)+20); |
| 118 | if (!buf) |
| 119 | return 1; |
| 120 | |
| 121 | sprintf(buf, "PASSWD %s\t%s\t%s\t%s\n", |
| 122 | service, uid, opwd, npwd); |
| 123 | |
| 124 | if (getPipe(&rdfd, &wrfd)) |
| 125 | { |
| 126 | free(buf); |
| 127 | return 1; |
| 128 | } |
| 129 | rc = _authdaemondopasswd(wrfd, rdfd, buf, strlen(buf)); |
| 130 | free(buf); |
| 131 | if (rc > 0) closePipe(); |
| 132 | return (rc); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | void auth_pipe_idle() |
| 137 | { |
| 138 | /* don't need to do anything when idle */ |
| 139 | } |
| 140 | |
| 141 | |
| 142 | void auth_pipe_close() |
| 143 | { |
| 144 | closePipe(); |
| 145 | } |
| 146 | |
| 147 | void auth_pipe_enumerate(void(*cb_func)(const char *name, |
| 148 | uid_t uid, |
| 149 | gid_t gid, |
| 150 | const char *homedir, |
| 151 | const char *maildir, |
| 152 | const char *options, |
| 153 | void *void_arg), |
| 154 | void *void_arg) |
| 155 | { |
| 156 | int rdfd, wrfd, rc; |
| 157 | |
| 158 | if (disabled_flag) |
| 159 | return; |
| 160 | |
| 161 | if (getPipe(&rdfd, &wrfd)) |
| 162 | return; |
| 163 | rc = _auth_enumerate(wrfd, rdfd, cb_func, void_arg); |
| 164 | if (rc > 0) closePipe(); |
| 165 | } |
| 166 | |
| 167 | static struct authstaticinfo authpipe_info={ |
| 168 | "authpipe", |
| 169 | auth_pipe, |
| 170 | auth_pipe_pre, |
| 171 | auth_pipe_close, |
| 172 | auth_pipe_chgpwd, |
| 173 | auth_pipe_idle, |
| 174 | auth_pipe_enumerate}; |
| 175 | |
| 176 | struct authstaticinfo *courier_authpipe_init() |
| 177 | { |
| 178 | disabled_flag=access(PIPE_PROGRAM, X_OK); |
| 179 | if (disabled_flag) |
| 180 | { |
| 181 | DPRINTF("authpipe: disabled: failed to stat pipe program %s: %s", |
| 182 | PIPE_PROGRAM, strerror(errno)); |
| 183 | } |
| 184 | return &authpipe_info; |
| 185 | } |