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Add support for public key pinning #2438

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sethmlarson opened this issue Sep 30, 2021 · 0 comments
Open

Add support for public key pinning #2438

sethmlarson opened this issue Sep 30, 2021 · 0 comments

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@sethmlarson
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sethmlarson commented Sep 30, 2021 •
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In Python 3.10 there were private APIs SSLObject.get_verified_chain() and _ssl.Certificate.public_bytes(_ssl.ENCODING_DER) methods added. In theory this means we can support pinning any certificate within the chain instead of only the peercert. This is great news as pinning only the peercert wasn't as useful as it doesn't allow for certificate rotation or for multiple leaf certificates to be verified by a single fingerprint.

Ref: python/cpython#25467

cc @tiran
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