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/*
* pop3d - IP/TCP/POP3 server for UNIX 4.3BSD
* Post Office Protocol - Version 3 (RFC1225)
*
* (C) Copyright 1991 Regents of the University of California
*
* Permission to use, copy, modify, and distribute this program
* for any purpose and without fee is hereby granted, provided
* that this copyright and permission notice appear on all copies
* and supporting documentation, the name of University of California
* not be used in advertising or publicity pertaining to distribution
* of the program without specific prior permission, and notice be
* given in supporting documentation that copying and distribution is
* by permission of the University of California.
* The University of California makes no representations about
* the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* Katie Stevens
* dkstevens@ucdavis.edu
* Information Technology -- Campus Access Point
* University of California, Davis
*
**************************************
*
* util.c
*
* REVISIONS:
* 02-27-90 [ks] original implementation
* 1.000 03-04-90 [ks]
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <pwd.h>
#ifdef SHADOWPWD
#include <shadow/shadow.h>
#include <shadow/pwauth.h>
#endif
#include "pop3.h"
char flash_buf[SVR_BUFSIZ];
#ifdef DEBUG
extern FILE *logfp;
#endif
/**************************************************************************/
/* Verify a usercode/password */
int
verify_user(user,pass)
char *user;
char *pass;
{
struct passwd *pwd;
#ifdef SHADOWPWD
struct spwd *spwd;
#endif
char *cp;
pwd = getpwnam(user);
if (pwd == NULL) return -1;
#ifdef SHADOWPWD
if (!(spwd = getspnam(user)))
return -1;
else
pwd->pw_passwd = spwd->sp_pwdp;
if (pwd->pw_name && pwd->pw_passwd[0] == '@') {
if (pw_auth(pwd->pw_passwd+1, user, PW_LOGIN))
return -1;
return(setuid(pwd->pw_uid));
}
if (!valid(pass, pwd))
return -1;
return(setuid(pwd->pw_uid));
#else
cp = crypt(pass,pwd->pw_passwd);
if (strcmp(cp,pwd->pw_passwd) == 0) {
return(setuid(pwd->pw_uid));
} else {
return(-1);
}
#endif
}
/**************************************************************************/
/* Read a line of text from a stream. If more than n-1 */
/* characters are read without a line terminator (LF), */
/* discard characters until line terminator is located. */
char *
fgetl(buf,n,fp)
char *buf; /* Buffer for text */
int n; /* Size of buffer */
FILE *fp; /* Stream to read from */
{
if (fgets(buf,n,fp) == NULL)
return(NULL);
if ((strlen(buf) == (n-1))&&(buf[n-1] != LF_CHAR)) {
buf[n-1] = LF_CHAR;
while (fgets(flash_buf,SVR_BUFSIZ,fp) != NULL) {
if (strlen(flash_buf) != (SVR_BUFSIZ-1))
break;
if (flash_buf[SVR_BUFSIZ-1] == LF_CHAR)
break;
}
}
return(buf);
}
/* Prepare client command for server */
void
cmd_prepare(buf)
char *buf;
{
char *cp;
if (buf == NULL)
return;
/* Convert command verb to lowercase */
while (*buf != NULL_CHAR) {
if (isupper(*buf))
*buf = tolower(*buf);
else if (isspace(*buf))
break;
++buf;
}
/* Strip trailing whitespace from client command */
if ((cp = strchr(buf,CR_CHAR)) != NULL) {
while ((cp != buf)&&(isspace(*cp))) --cp;
if (!isspace(*cp)) ++cp;
*cp = NULL_CHAR;
}
if ((cp = strchr(buf,LF_CHAR)) != NULL) {
while ((cp != buf)&&(isspace(*cp))) --cp;
if (!isspace(*cp)) ++cp;
*cp = NULL_CHAR;
}
}
/**************************************************************************/
/* Send an error message and exit POP3 server */
void
fail(err)
int err;
{
char *cp;
switch(err) {
case FAIL_FILE_ERROR: /* File I/O error */
cp = "File I/O error";
break;
case FAIL_HANGUP: /* Client hung up on us */
cp = "Lost connectino to client";
break;
case FAIL_LOST_CLIENT: /* Timeout waiting for client */
cp = "Timeout waiting for command from client";
break;
case FAIL_OUT_OF_MEMORY: /* Failed malloc() */
cp = "Out of memory!";
break;
case FAIL_PROGERR: /* Fatal program error */
cp = "Fatal program error!";
break;
case FAIL_CONFUSION: /* Shouldnt happen */
default:
cp = "Complete confusion!";
break;
}
fprintf(stdout,"-ERR POP3 Server Abnormal Shutdown: %s\r\n",cp);
fflush(stdout);
#ifdef DEBUG
fprintf(logfp,"-ERR POP3 Server Abnormal Shutdown: %s\r\n",cp);
fclose(logfp);
#endif
exit(err); /* Exit with error */
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.