From 8d2408c16943ca3c7beb70905690e3b1e24079b2 Mon Sep 17 00:00:00 2001 From: mathieui Date: Wed, 8 Oct 2014 12:55:22 +0200 Subject: Use SHA-2 (SHA-512) to store the certificate fingerprint instead of SHA-1 Because SHA-1 is not really relevant anymore. Too bad it's significantly longer and tiring to check, even if that is to be expected. --- src/core/handlers.py | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-) (limited to 'src') diff --git a/src/core/handlers.py b/src/core/handlers.py index 462ba4d7..96a0f7e8 100644 --- a/src/core/handlers.py +++ b/src/core/handlers.py @@ -8,7 +8,7 @@ log = logging.getLogger(__name__) import curses import ssl import time -from hashlib import sha1 +from hashlib import sha1, sha512 from gettext import gettext as _ from sleekxmpp import InvalidJID @@ -1069,16 +1069,27 @@ def validate_ssl(self, pem): config.set_and_save('certificate', cert) der = ssl.PEM_cert_to_DER_cert(pem) - digest = sha1(der).hexdigest().upper() - found_cert = ':'.join(i + j for i, j in zip(digest[::2], digest[1::2])) + sha1_digest = sha1(der).hexdigest().upper() + sha1_found_cert = ':'.join(i + j for i, j in zip(sha1_digest[::2], sha1_digest[1::2])) + sha2_digest = sha512(der).hexdigest().upper() + sha2_found_cert = ':'.join(i + j for i, j in zip(sha2_digest[::2], sha2_digest[1::2])) if cert: - if found_cert == cert: - log.debug('Cert %s OK', found_cert) + if sha1_found_cert == cert: + log.debug('Cert %s OK', sha1_found_cert) + log.debug('Current hash is SHA-1, moving to SHA-2 (%s)', + sha2_found_cert) + config.set_and_save('certificate', sha2_found_cert) + return + elif sha2_found_cert == cert: + log.debug('Cert %s OK', sha2_found_cert) return else: saved_input = self.current_tab().input - log.debug('\nWARNING: CERTIFICATE CHANGED old: %s, new: %s\n', cert, found_cert) - input = windows.YesNoInput(text="WARNING! Server certificate has changed, accept? (y/n) (%s)" % found_cert) + log.debug('\nWARNING: CERTIFICATE CHANGED old: %s, new: %s\n', cert, sha2_found_cert) + self.information('New certificate found (sha-2 hash:' + ' %s)\nPlease validate or abort' % sha2_found_cert, + 'Warning') + input = windows.YesNoInput(text="WARNING! Server certificate has changed, accept? (y/n)") self.current_tab().input = input input.resize(1, self.current_tab().width, self.current_tab().height-1, 0) input.refresh() @@ -1089,16 +1100,16 @@ def validate_ssl(self, pem): self.current_tab().input = saved_input self.paused = False if input.value: - self.information('Setting new certificate: old: %s, new: %s' % (cert, found_cert), 'Info') - log.debug('Setting certificate to %s', found_cert) - if not config.silent_set('certificate', found_cert): + self.information('Setting new certificate: old: %s, new: %s' % (cert, sha2_found_cert), 'Info') + log.debug('Setting certificate to %s', sha2_found_cert) + if not config.silent_set('certificate', sha2_found_cert): self.information(_('Unable to write in the config file'), 'Error') else: self.information('You refused to validate the certificate. You are now disconnected', 'Info') self.xmpp.disconnect() else: - log.debug('First time. Setting certificate to %s', found_cert) - if not config.silent_set('certificate', found_cert): + log.debug('First time. Setting certificate to %s', sha2_found_cert) + if not config.silent_set('certificate', sha2_found_cert): self.information(_('Unable to write in the config file'), 'Error') def _composing_tab_state(tab, state): -- cgit v1.2.3