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Remove SHA-1 support about webpki HOT 2 OPEN

briansmith avatar briansmith commented on August 26, 2024
Remove SHA-1 support

from webpki.

Comments (2)

briansmith avatar briansmith commented on August 26, 2024

RSA_PKCS1_2048_8192_SHA1

According to the Chromium developers, it isn't fully web-compatible to remove support for RSA with SHA-1 signatures for TLS 1.2 ServerKeyExchange messages, so I'm going to keep RSA_PKCS1_2048_8192_SHA1 for now. We should add some documentation about how to use it: In particular, it shouldn't be passed as an acceptable certificate signature algorithm, but it may be necessary to pass it to EndEndityCert::verify_signature as an acceptable algorithm if maximum web compatbility is necessary.

However, also according to them, it is web-compatible to remove support for ECDSA-SHA1 and ECDSA-SHA512 signatures, and I've done that for 0.6.0 in these commits:

We still also may remove RSA_PKCS1_2048_8192_SHA1 completely, depending on what our own compatibility testing shows.

from webpki.

briansmith avatar briansmith commented on August 26, 2024

c26bca4 is related to this: It removes support for a legacy RSA-SHA1 algorithm identifier.

from webpki.

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