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WiFiClientSecure: don't use the broken max_fragment_length extension #4033

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merged 2 commits into from
Dec 28, 2017

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@igrr igrr commented Dec 27, 2017

axTLS does not correctly implement max_fragment_length extension. This
causes servers which understand this extension (currently GnuTLS- and
WolfSSL-based) to reject the client hello.

Until this is fixed in axTLS, remove the call to enable this extension
from WiFiClientSecure.

Fixes #3932.

igrr and others added 2 commits December 28, 2017 01:32
axTLS does not correctly implement max_fragment_length extension. This
causes servers which understand this extension (currently GnuTLS- and
WolfSSL-based) to reject the client hello.

Until this is fixed in axTLS, remove the call to enable this extension
from WiFiClientSecure.

Fixes #3932.
@devyte devyte merged commit 3838e58 into master Dec 28, 2017
@igrr igrr deleted the bugfix/disable_max_fragment_length_ext branch January 2, 2018 00:35
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wificlientsecure fails to connect with smtp2go, but works with gmail
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