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nsh_stdsession() cannot use the same login logic as nsh_session(); Also put telnet login in a separate file for symmetry
This commit is contained in:
Gregory Nutt
251
nshlib/nsh_telnetlogin.c
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251
nshlib/nsh_telnetlogin.c
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/****************************************************************************
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* apps/nshlib/nsh_telnetlogin.c
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*
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* Copyright (C) 2007-2013, 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <apps/fsutils/passwd.h>
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#include "nsh.h"
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#include "nsh_console.h"
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#ifdef CONFIG_NSH_TELNET_LOGIN
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define TELNET_IAC 255
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#define TELNET_WILL 251
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#define TELNET_WONT 252
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#define TELNET_DO 253
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#define TELNET_DONT 254
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#define TELNET_USE_ECHO 1
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#define TELNET_NOTUSE_ECHO 0
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nsh_telnetecho
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****************************************************************************/
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static void nsh_telnetecho(FAR struct console_stdio_s *pstate, uint8_t is_use)
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{
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uint8_t optbuf[4];
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optbuf[0] = TELNET_IAC;
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optbuf[1] = (is_use == TELNET_USE_ECHO) ? TELNET_WILL : TELNET_DO;
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optbuf[2] = 1;
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optbuf[3] = 0;
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fputs((char *)optbuf, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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}
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/****************************************************************************
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* Name: nsh_telnettoken
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****************************************************************************/
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static void nsh_telnettoken(FAR struct console_stdio_s *pstate,
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FAR char *buffer, size_t buflen)
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{
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FAR char *start;
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FAR char *endp1;
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bool quoted = false;
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/* Find the start of token. Either (1) the first non-white space
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* character on the command line or (2) the character immediately after
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* a quotation mark.
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*/
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for (start = pstate->cn_line; *start; start++)
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{
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/* Does the token open with a quotation mark */
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if (*start == '"')
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{
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/* Yes.. break out with start set to the character after the
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* quotation mark.
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*/
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quoted = true;
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start++;
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break;
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}
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/* No, then any non-whitespace is the first character of the token */
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else if (!isspace(*start))
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{
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/* Break out with start set to the first character of the token */
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break;
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}
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}
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/* Find the terminating character after the token on the command line. The
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* terminating character is either (1) the matching quotation mark, or (2)
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* any whitespace.
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*/
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for (endp1 = start; *endp1; endp1++)
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{
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/* Did the token begin with a quotation mark? */
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if (quoted)
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{
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/* Yes.. then only the matching quotation mark (or end of string)
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* terminates
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*/
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if (*endp1 == '"')
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{
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/* Break out... endp1 points to closing quotation mark */
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break;
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}
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}
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/* No.. any whitespace (or end of string) terminates */
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else if (isspace(*endp1))
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{
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/* Break out... endp1 points to first while space encountered */
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break;
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}
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}
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/* Replace terminating character with a NUL terminator */
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*endp1 = '\0';
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/* Copied the token into the buffer */
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strncpy(buffer, start, buflen);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nsh_telnetlogin
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****************************************************************************/
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int nsh_telnetlogin(FAR struct console_stdio_s *pstate)
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{
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char username[16];
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char password[16];
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#ifdef CONFIG_FSUTILS_PASSWD
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int ret;
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#endif
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int i;
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/* Present the NSH Telnet greeting */
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fputs(g_telnetgreeting, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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/* Loop for the configured number of retries */
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for (i = 0; i < CONFIG_NSH_LOGIN_FAILCOUNT; i++)
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{
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/* Ask for the login username */
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fputs(g_userprompt, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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username[0] = '\0';
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if (fgets(pstate->cn_line, CONFIG_NSH_LINELEN, INSTREAM(pstate)) != NULL)
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{
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/* Parse out the username */
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nsh_telnettoken(pstate, username, sizeof(username));
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}
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/* Ask for the login password */
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fputs(g_passwordprompt, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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nsh_telnetecho(pstate, TELNET_NOTUSE_ECHO);
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password[0] = '\0';
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if (fgets(pstate->cn_line, CONFIG_NSH_LINELEN, INSTREAM(pstate)) != NULL)
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{
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/* Parse out the password */
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nsh_telnettoken(pstate, password, sizeof(password));
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/* Verify the username and password */
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#ifdef CONFIG_FSUTILS_PASSWD
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ret = passwd_verify(username, password);
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if (PASSWORD_VERIFY_MATCH(ret))
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#else
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if (strcmp(password, CONFIG_NSH_LOGIN_PASSWORD) == 0 &&
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strcmp(username, CONFIG_NSH_LOGIN_USERNAME) == 0)
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#endif
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{
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fputs(g_loginsuccess, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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nsh_telnetecho(pstate, TELNET_USE_ECHO);
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return OK;
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}
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else
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{
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fputs(g_badcredentials, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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}
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}
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nsh_telnetecho(pstate, TELNET_USE_ECHO);
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}
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/* Too many failed login attempts */
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fputs(g_loginfailure, pstate->cn_outstream);
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fflush(pstate->cn_outstream);
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return -1;
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}
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#endif /* CONFIG_NSH_TELNET_LOGIN */
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