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Title: [3.7] [bpo-28414] Make all hostnames in SSL module IDN A-labels (GH-5128) by miss-islington · Pull Request #5843 · python/cpython · GitHub

Open Graph Title: [3.7] [bpo-28414] Make all hostnames in SSL module IDN A-labels (GH-5128) by miss-islington · Pull Request #5843 · python/cpython

X Title: [3.7] [bpo-28414] Make all hostnames in SSL module IDN A-labels (GH-5128) by miss-islington · Pull Request #5843 · python/cpython

Description: Previously, the ssl module stored international domain names (IDNs) as U-labels. This is problematic for a number of reasons -- for example, it made it impossible for users to use a different version of IDNA than the one built into Python. After this change, we always convert to A-labels as soon as possible, and use them for all internal processing. In particular, server_hostname attribute is now an A-label, and on the server side there's a new sni_callback that receives the SNI servername as an A-label rather than a U-label. (cherry picked from commit 11a1493) Co-authored-by: Christian Heimes christian@python.org https://bugs.python.org/issue28414

Open Graph Description: Previously, the ssl module stored international domain names (IDNs) as U-labels. This is problematic for a number of reasons -- for example, it made it impossible for users to use a different versi...

X Description: Previously, the ssl module stored international domain names (IDNs) as U-labels. This is problematic for a number of reasons -- for example, it made it impossible for users to use a different versi...

Opengraph URL: https://github.com/python/cpython/pull/5843

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