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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/* ap_getpass.c: abstraction to provide for obtaining a password from the
* command line in whatever way the OS supports. In the best case, it's a
* wrapper for the system library's getpass() routine; otherwise, we
* use one we define ourselves.
*/
#include "apr_config.h"
#include "apr_lib.h"
#include "apr_errno.h"
#include <sys/types.h>
#include <errno.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_CONIO_H
#include <conio.h>
#endif
#if defined(HAVE_TERMIOS_H) && !defined(HAVE_GETPASS)
#include <termios.h>
#endif
#ifndef CHARSET_EBCDIC
#define LF 10
#define CR 13
#else /* CHARSET_EBCDIC */
#define LF '\n'
#define CR '\r'
#endif /* CHARSET_EBCDIC */
#define MAX_STRING_LEN 256
#define ERR_OVERFLOW 5
#ifndef HAVE_GETPASS
/* MPE, Win32 and BeOS all lack a native getpass() */
#if !defined(HAVE_TERMIOS_H) && !defined(WIN32)
/*
* MPE lacks getpass() and a way to suppress stdin echo. So for now, just
* issue the prompt and read the results with echo. (Ugh).
*/
static char *getpass(const char *prompt)
{
static char password[MAX_STRING_LEN];
fputs(prompt, stderr);
gets((char *) &password);
if (strlen((char *) &password) > (MAX_STRING_LEN - 1)) {
password[MAX_STRING_LEN - 1] = '\0';
}
return (char *) &password;
}
#elif defined (HAVE_TERMIOS_H)
static char *getpass(const char *prompt)
{
struct termios attr;
static char password[MAX_STRING_LEN];
int n=0;
fputs(prompt, stderr);
fflush(stderr);
if (tcgetattr(STDIN_FILENO, &attr) != 0)
return NULL;
attr.c_lflag &= ~(ECHO);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &attr) != 0)
return NULL;
while ((password[n] = getchar()) != '\n') {
if (password[n] >= ' ' && password[n] <= '~') {
n++;
} else {
fprintf(stderr,"\n");
fputs(prompt, stderr);
fflush(stderr);
n = 0;
}
}
password[n] = '\0';
printf("\n");
if (n > (MAX_STRING_LEN - 1)) {
password[MAX_STRING_LEN - 1] = '\0';
}
attr.c_lflag |= ECHO;
tcsetattr(STDIN_FILENO, TCSANOW, &attr);
return (char*) &password;
}
#else
/*
* Windows lacks getpass(). So we'll re-implement it here.
*/
static char *getpass(const char *prompt)
{
static char password[MAX_STRING_LEN];
int n = 0;
fputs(prompt, stderr);
while ((password[n] = _getch()) != '\r') {
if (password[n] >= ' ' && password[n] <= '~') {
n++;
printf("*");
}
else {
printf("\n");
fputs(prompt, stderr);
n = 0;
}
}
password[n] = '\0';
printf("\n");
if (n > (MAX_STRING_LEN - 1)) {
password[MAX_STRING_LEN - 1] = '\0';
}
return (char *) &password;
}
#endif /* no getchar or _getch */
#endif /* no getpass */
/*
* Use the OS getpass() routine (or our own) to obtain a password from
* the input stream.
*
* Exit values:
* 0: Success
* 5: Partial success; entered text truncated to the size of the
* destination buffer
*
* Restrictions: Truncation also occurs according to the host system's
* getpass() semantics, or at position 255 if our own version is used,
* but the caller is *not* made aware of it.
*/
API_EXPORT(ap_status_t) ap_getpass(const char *prompt, char *pwbuf, size_t *bufsiz)
{
char *pw_got = NULL;
int result = 0;
pw_got = getpass(prompt);
if (strlen(pw_got) > (*bufsiz - 1)) {
*bufsiz = ERR_OVERFLOW;
return APR_ENAMETOOLONG;
}
ap_cpystrn(pwbuf, pw_got, *bufsiz);
*bufsiz = result;
return APR_SUCCESS;
}
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