[1] [[ダイジェストアルゴリズム]] [DFN[[CODE(HTTP)@en[[[SHA-256]]]]]]
は、 [[SHA-256]] の [[RFC 4648]] [[Base64]] [[符号化]]を表します [SRC[>>2]]。

* 仕様書

[REFS[
- [2] '''[CITE@en[RFC 5843 - Additional Hash Algorithms for HTTP Instance Digests]] ([TIME[2014-09-14 20:44:32 +09:00]] 版) <http://tools.ietf.org/html/rfc5843#section-2.2>'''
- [3] [CITE@en[RFC 6249 - Metalink/HTTP: Mirrors and Hashes]] ([TIME[2014-09-07 22:47:12 +09:00]] 版) <http://tools.ietf.org/html/rfc6249#section-2>
]REFS]

* 文脈

[4] [[Metalink/HTTP]] [[鯖]]は [CODE(HTTP)@en[[[SHA-256]]]]
への対応が義務付けられています [SRC[>>3]]。

[5] [CITE@en[RFC 4055 - Additional Algorithms and Identifiers for RSA Cryptography for use in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile]]
([TIME[2018-09-02 21:55:48 +09:00]])
<https://tools.ietf.org/html/rfc4055#section-2.1>