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sslutil: work around SSLContext.get_ca_certs bug on Windows (issue5313) SSLContext.get_ca_certs() can raise "ssl.SSLError: unknown error (_ssl.c:636)" on Windows. See https://bugs.python.org/issue20916 for more info. We add a try..except that swallows the exception to work around this bug. If we encounter the bug, we won't print a warning message about attempting to load CA certificates. This is unfortunate. But there appears to be little we can do :/
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 25 Jul 2016 12:00:55 -0700
parents 53e80179bd6a
children 799e36749f1a
comparison
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29630:67b180c0e263 29631:387bdd53c77e
407 # If we're doing certificate verification and no CA certs are loaded, 407 # If we're doing certificate verification and no CA certs are loaded,
408 # that is almost certainly the reason why verification failed. Provide 408 # that is almost certainly the reason why verification failed. Provide
409 # a hint to the user. 409 # a hint to the user.
410 # Only modern ssl module exposes SSLContext.get_ca_certs() so we can 410 # Only modern ssl module exposes SSLContext.get_ca_certs() so we can
411 # only show this warning if modern ssl is available. 411 # only show this warning if modern ssl is available.
412 if (caloaded and settings['verifymode'] == ssl.CERT_REQUIRED and 412 # The exception handler is here because of
413 modernssl and not sslcontext.get_ca_certs()): 413 # https://bugs.python.org/issue20916.
414 ui.warn(_('(an attempt was made to load CA certificates but none ' 414 try:
415 'were loaded; see ' 415 if (caloaded and settings['verifymode'] == ssl.CERT_REQUIRED and
416 'https://mercurial-scm.org/wiki/SecureConnections for ' 416 modernssl and not sslcontext.get_ca_certs()):
417 'how to configure Mercurial to avoid this error)\n')) 417 ui.warn(_('(an attempt was made to load CA certificates but '
418 'none were loaded; see '
419 'https://mercurial-scm.org/wiki/SecureConnections '
420 'for how to configure Mercurial to avoid this '
421 'error)\n'))
422 except ssl.SSLError:
423 pass
418 # Try to print more helpful error messages for known failures. 424 # Try to print more helpful error messages for known failures.
419 if util.safehasattr(e, 'reason'): 425 if util.safehasattr(e, 'reason'):
420 # This error occurs when the client and server don't share a 426 # This error occurs when the client and server don't share a
421 # common/supported SSL/TLS protocol. We've disabled SSLv2 and SSLv3 427 # common/supported SSL/TLS protocol. We've disabled SSLv2 and SSLv3
422 # outright. Hopefully the reason for this error is that we require 428 # outright. Hopefully the reason for this error is that we require