view test/tx_Source_detector.py @ 5717:cad18de2b988

issue2550949: Rate limit password guesses/login attempts. Generic rate limit mechanism added. Deployed for web page logins. Default is 3 login attempts/minute for a user. After which one login attempt every 20 seconds can be done. Uses gcra algorithm so all I need to store is a username and timestamp in the one time key database. This does mean I don't have a list of all failed login attempts as part of the rate limiter. Set up config setting as well so admin can tune the rate. Maybe 1 every 10 seconds is ok at a site with poor typists who need 6 attempts to get the password right 8-). The gcra method can also be used to limit the rest and xmlrpc interfaces if needed. The mechanism I added also supplies a status method that calculates the expected values for http headers returned as part of rate limiting. Also tests added to test all code paths I hope.
author John Rouillard <rouilj@ieee.org>
date Sat, 11 May 2019 17:24:58 -0400
parents 64b05e24dbd8
children 9938c40e03bc
line wrap: on
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#
# Example output when the web interface changes item 3 and the email
# (non pgp) interface changes item 4:
#
# tx_SourceCheckAudit(3) pre db.tx_Source: cgi
# tx_SourceCheckAudit(4) pre db.tx_Source: email
# tx_SourceCheckAudit(3) post db.tx_Source: cgi
# tx_SourceCheckAudit(4) post db.tx_Source: email
# tx_SourceCheckReact(4) pre db.tx_Source: email
# tx_SourceCheckReact(4) post db.tx_Source: email
# tx_SourceCheckReact(3) pre db.tx_Source: cgi
# tx_SourceCheckReact(3) post db.tx_Source: cgi
#
# Note that the calls are interleaved, but the proper
# tx_Source is associated with the same ticket.

from __future__ import print_function
import time as time

def tx_SourceCheckAudit(db, cl, nodeid, newvalues):
    ''' An auditor to print the value of the source of the
        transaction that trigger this change. The sleep call
        is used to delay the transaction so that multiple changes will
        overlap. The expected output from this detector are 2 lines
        with the same value for tx_Source. Tx source is:
          None - Reported when using a script or it is an error if
                 the change arrives by another method.
          "cli" - reported when using roundup-admin
          "web" - reported when using any web based technique
          "email" - reported when using an unautheticated email based technique
          "email-sig-openpgp" - reported when email with a valid pgp
                                signature is used
    '''
    if __debug__ and False:
        print("\n  tx_SourceCheckAudit(%s) db.tx_Source: %s"%(nodeid, db.tx_Source))

    newvalues['tx_Source'] = db.tx_Source

    # example use for real to prevent a change from happening if it's
    # submited via email
    #
    # if db.tx_Source == "email":
    #    raise Reject, 'Change not allowed via email'

def tx_SourceCheckReact(db, cl, nodeid, oldvalues):
    ''' An reactor to print the value of the source of the
        transaction that trigger this change. The sleep call
        is used to delay the transaction so that multiple changes will
        overlap. The expected output from this detector are 2 lines
        with the same value for tx_Source. Tx source is:
          None - Reported when using a script or it is an error if
                 the change arrives by another method.
          "cli" - reported when using roundup-admin
          "web" - reported when using any web based technique
          "email" - reported when using an unautheticated email based technique
          "email-sig-openpgp" - reported when email with a valid pgp
                                signature is used
    '''

    if __debug__ and False:
        print("  tx_SourceCheckReact(%s) db.tx_Source: %s"%(nodeid, db.tx_Source))



def init(db):
    db.issue.audit('create', tx_SourceCheckAudit)
    db.issue.audit('set', tx_SourceCheckAudit)

    db.issue.react('set', tx_SourceCheckReact)
    db.issue.react('create', tx_SourceCheckReact)

    db.msg.audit('create', tx_SourceCheckAudit)

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