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Match latest GBS spec.

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Itamar Turner-Trauring 2022-09-15 09:59:36 -04:00
parent 7c25e1533f
commit 00972ba3c6
1 changed files with 4 additions and 6 deletions
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docs/specifications/url.rst
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@ -103,11 +103,8 @@ Version 1
The hash component of a version 1 NURL differs in three ways from the prior version. The hash component of a version 1 NURL differs in three ways from the prior version.
1. The hash function used is SHA3-224 instead of SHA1. 1. The hash function used is SHA-256, to match RFC 7469.
The security of SHA1 `continues to be eroded`_. The security of SHA1 `continues to be eroded`_; Latacora `SHA-2`_.
Contrariwise SHA3 is currently the most recent addition to the SHA family by NIST.
The 224 bit instance is chosen to keep the output short and because it offers greater collision resistance than SHA1 was thought to offer even at its inception
(prior to security research showing actual collision resistance is lower).
2. The hash is computed over the certificate's SPKI instead of the whole certificate. 2. The hash is computed over the certificate's SPKI instead of the whole certificate.
This allows certificate re-generation so long as the public key remains the same. This allows certificate re-generation so long as the public key remains the same.
This is useful to allow contact information to be updated or extension of validity period. This is useful to allow contact information to be updated or extension of validity period.
@ -140,7 +137,8 @@ Examples
* ``pb://azEu8vlRpnEeYm0DySQDeNY3Z2iJXHC_bsbaAw@localhost:47877/64i4aokv4ej#v=1`` * ``pb://azEu8vlRpnEeYm0DySQDeNY3Z2iJXHC_bsbaAw@localhost:47877/64i4aokv4ej#v=1``
.. _`continues to be eroded`: https://en.wikipedia.org/wiki/SHA-1#Cryptanalysis_and_validation .. _`continues to be eroded`: https://en.wikipedia.org/wiki/SHA-1#Cryptanalysis_and_validation
.. _`explored by the web community`: https://www.imperialviolet.org/2011/05/04/pinning.html .. _`SHA-2`: https://latacora.micro.blog/2018/04/03/cryptographic-right-answers.html
.. _`explored by the web community`: https://www.rfc-editor.org/rfc/rfc7469
.. _Foolscap: https://github.com/warner/foolscap .. _Foolscap: https://github.com/warner/foolscap
.. [1] ``foolscap.furl.decode_furl`` is taken as the canonical definition of the syntax of a fURL. .. [1] ``foolscap.furl.decode_furl`` is taken as the canonical definition of the syntax of a fURL.