Andrew Boyson
Common stuff for all my devices' web server pages: css, login, log, ipv4, ipv6, firmware update, clock, reset info etc.
Dependents: oldheating gps motorhome heating
Security
A password has to be set whenever there has been a software reset. Resets following faults or power on do not require a new password as the hash is restored from the RTC GPREG register.
The password is not saved on the device; instead a 32 bit hash of the password is saved. It would take 2^31 attempts to brute force the password: this could be done in under a month if an attempt were possible every millisecond. To prevent this a 200 ms delay is introduced in the reply to the login form, that gives a more reasonable 13 years to brute force the password.
Once the password is accepted a random session id is created. This is 36 bit to give six base 64 characters but without an extra delay. If an attempt could be made every ms then this would still take over a year to brute force.
The most likely attack would to use a dictionary with, say, 10 million entries against the password which would still take 20 days to do.
base/web-server-base.c
- Committer:
- andrewboyson
- Date:
- 2019-07-31
- Revision:
- 127:bd6dd135009d
- Parent:
- 120:85a4d8f7517d
- Child:
- 132:5b2df69a4f17
File content as of revision 127:bd6dd135009d:
#include "http.h"
#include "web.h"
#include "web-pages-base.h"
#define DO_FAVICON DO_BASE + 1
#define DO_BASE_CSS DO_BASE + 2
#define DO_NAV_CSS DO_BASE + 3
#define DO_CLOCK_HTML DO_BASE + 4
#define DO_CLOCK_AJAX DO_BASE + 5
#define DO_CLOCK_SCRIPT DO_BASE + 6
#define DO_NET_HTML DO_BASE + 7
#define DO_NET4_HTML DO_BASE + 8
#define DO_NET4_AJAX DO_BASE + 9
#define DO_NET4_SCRIPT DO_BASE + 10
#define DO_NET6_HTML DO_BASE + 11
#define DO_NET6_AJAX DO_BASE + 12
#define DO_NET6_SCRIPT DO_BASE + 13
#define DO_TRACE_HTML DO_BASE + 14
#define DO_TRACE_AJAX DO_BASE + 15
#define DO_TRACE_SCRIPT DO_BASE + 16
#define DO_LOG_HTML DO_BASE + 17
#define DO_RESET_HTML DO_BASE + 18
#define DO_FIRMWARE_HTML DO_BASE + 19
#define DO_FIRMWARE_AJAX DO_BASE + 20
#define DO_FIRMWARE_SCRIPT DO_BASE + 21
int WebServerBaseDecideWhatToDo(char *pPath, char* pLastModified)
{
if (HttpSameStr(pPath, "/clock" )) return DO_CLOCK_HTML;
if (HttpSameStr(pPath, "/clock-ajax" )) return DO_CLOCK_AJAX;
if (HttpSameStr(pPath, "/net" )) return DO_NET_HTML;
if (HttpSameStr(pPath, "/net4" )) return DO_NET4_HTML;
if (HttpSameStr(pPath, "/net4-ajax" )) return DO_NET4_AJAX;
if (HttpSameStr(pPath, "/net6" )) return DO_NET6_HTML;
if (HttpSameStr(pPath, "/net6-ajax" )) return DO_NET6_AJAX;
if (HttpSameStr(pPath, "/log" )) return DO_LOG_HTML;
if (HttpSameStr(pPath, "/trace" )) return DO_TRACE_HTML;
if (HttpSameStr(pPath, "/trace-ajax" )) return DO_TRACE_AJAX;
if (HttpSameStr(pPath, "/reset" )) return DO_RESET_HTML;
if (HttpSameStr(pPath, "/firmware" )) return DO_FIRMWARE_HTML;
if (HttpSameStr(pPath, "/firmware-ajax")) return DO_FIRMWARE_AJAX;
if (HttpSameStr(pPath, "/favicon.ico" )) return HttpSameDate(WebFaviconDate, WebFaviconTime, pLastModified) ? DO_NOT_MODIFIED : DO_FAVICON;
if (HttpSameStr(pPath, "/base.css" )) return HttpSameDate(WebBaseCssDate, WebBaseCssTime, pLastModified) ? DO_NOT_MODIFIED : DO_BASE_CSS;
if (HttpSameStr(pPath, "/settings.css" )) return HttpSameDate(WebNavCssDate, WebNavCssTime, pLastModified) ? DO_NOT_MODIFIED : DO_NAV_CSS;
if (HttpSameStr(pPath, "/net4.js" )) return HttpSameDate(WebNet4ScriptDate, WebNet4ScriptTime, pLastModified) ? DO_NOT_MODIFIED : DO_NET4_SCRIPT;
if (HttpSameStr(pPath, "/net6.js" )) return HttpSameDate(WebNet6ScriptDate, WebNet6ScriptTime, pLastModified) ? DO_NOT_MODIFIED : DO_NET6_SCRIPT;
if (HttpSameStr(pPath, "/trace.js" )) return HttpSameDate(WebTraceScriptDate, WebTraceScriptTime, pLastModified) ? DO_NOT_MODIFIED : DO_TRACE_SCRIPT;
if (HttpSameStr(pPath, "/clock.js" )) return HttpSameDate(WebClockScriptDate, WebClockScriptTime, pLastModified) ? DO_NOT_MODIFIED : DO_CLOCK_SCRIPT;
if (HttpSameStr(pPath, "/firmware.js" )) return HttpSameDate(WebFirmwareScriptDate, WebFirmwareScriptTime, pLastModified) ? DO_NOT_MODIFIED : DO_FIRMWARE_SCRIPT;
return DO_NOT_FOUND;
}
bool WebServerBaseHandleQuery(int todo, char* pQuery)
{
switch (todo)
{
case DO_TRACE_AJAX: WebTraceQuery (pQuery); return true;
case DO_CLOCK_AJAX: WebClockQuery (pQuery); return true;
case DO_CLOCK_HTML: WebClockQuery (pQuery); return true;
case DO_LOG_HTML: WebLogQuery (pQuery); return true;
case DO_RESET_HTML: WebResetQuery (pQuery); return true;
case DO_FIRMWARE_HTML: WebFirmwareQuery(pQuery); return true;
case DO_FIRMWARE_AJAX: WebFirmwareQuery(pQuery); return true;
}
return false;
}
bool WebServerBasePost(int todo, int contentLength, int contentStart, int size, char* pRequestStream, uint32_t positionInRequestStream, bool* pComplete)
{
switch (todo)
{
case DO_FIRMWARE_AJAX: WebFirmwarePost(contentLength, contentStart, size, pRequestStream, positionInRequestStream, pComplete); return true;
}
return false;
}
bool WebServerBaseReply(int todo)
{
switch (todo)
{
case DO_FAVICON: WebFavicon (); return true;
case DO_BASE_CSS: WebBaseCss (); return true;
case DO_NAV_CSS: WebNavCss (); return true;
case DO_TRACE_HTML: WebTraceHtml (); return true;
case DO_TRACE_AJAX: WebTraceAjax (); return true;
case DO_TRACE_SCRIPT: WebTraceScript (); return true;
case DO_CLOCK_HTML: WebClockHtml (); return true;
case DO_CLOCK_AJAX: WebClockAjax (); return true;
case DO_CLOCK_SCRIPT: WebClockScript (); return true;
case DO_NET_HTML: WebNetHtml (); return true;
case DO_NET4_HTML: WebNet4Html (); return true;
case DO_NET4_AJAX: WebNet4Ajax (); return true;
case DO_NET4_SCRIPT: WebNet4Script (); return true;
case DO_NET6_HTML: WebNet6Html (); return true;
case DO_NET6_AJAX: WebNet6Ajax (); return true;
case DO_NET6_SCRIPT: WebNet6Script (); return true;
case DO_LOG_HTML: WebLogHtml (); return true;
case DO_RESET_HTML: WebResetHtml (); return true;
case DO_FIRMWARE_HTML: WebFirmwareHtml (); return true;
case DO_FIRMWARE_AJAX: WebFirmwareAjax (); return true;
case DO_FIRMWARE_SCRIPT: WebFirmwareScript(); return true;
}
return false;
}