SCRAM-SHA-***(-PLUS) supports

[Neustradamus]

"When using the SASL SCRAM mechanism, the SCRAM-SHA-256-PLUS variant SHOULD be preferred over the SCRAM-SHA-256 variant, and SHA-256 variants [RFC7677] SHOULD be preferred over SHA-1 variants [RFC5802]".

It is possible to have?

• SCRAM-SHA-1
• SCRAM-SHA-1-PLUS
• SCRAM-SHA-224
• SCRAM-SHA-224-PLUS
• SCRAM-SHA-256
• SCRAM-SHA-256-PLUS
• SCRAM-SHA-384
• SCRAM-SHA-384-PLUS
• SCRAM-SHA-512
• SCRAM-SHA-512-PLUS
• SCRAM-SHA3?

Main code:
-> https://github.com/pear/Auth_SASL/blob/master/Auth/SASL/SCRAM.php
-> https://github.com/pear/Auth_SASL2/blob/master/Auth/SASL2/SCRAM.php

A fork:
-> https://github.com/fabiang/sasl

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SCRAM-SHA-1(-PLUS):

• RFC5802: Salted Challenge Response Authentication Mechanism (SCRAM) SASL and GSS-API Mechanisms: https://tools.ietf.org/html/rfc5802
• RFC6120: Extensible Messaging and Presence Protocol (XMPP): Core: https://tools.ietf.org/html/rfc6120

SCRAM-SHA-256(-PLUS):

• RFC7677: SCRAM-SHA-256 and SCRAM-SHA-256-PLUS Simple Authentication and Security Layer (SASL) Mechanisms: https://tools.ietf.org/html/rfc7677 - since 2015-11-02
• RFC8600: Using Extensible Messaging and Presence Protocol (XMPP) for Security Information Exchange: https://tools.ietf.org/html/rfc8600 - since 2019-06-21: https://mailarchive.ietf.org/arch/msg/ietf-announce/suJMmeMhuAOmGn_PJYgX5Vm8lNA

-PLUS variants:

• RFC5056: On the Use of Channel Bindings to Secure Channels: https://tools.ietf.org/html/rfc5056
• RFC5929: Channel Bindings for TLS: https://tools.ietf.org/html/rfc5929
• Channel-Binding Types: https://www.iana.org/assignments/channel-binding-types/channel-binding-types.xhtml
• RFC 9266: Channel Bindings for TLS 1.3: https://tools.ietf.org/html/rfc9266

Soon RFCs:

• SCRAM-SHA-512(-PLUS): https://tools.ietf.org/html/draft-melnikov-scram-sha-512
• SCRAM-SHA3-512(-PLUS): https://tools.ietf.org/html/draft-melnikov-scram-sha3-512
• Extensions to Salted Challenge Response (SCRAM) for 2 factor authentication: https://tools.ietf.org/html/draft-melnikov-scram-2fa

LDAP:

• RFC5803: Lightweight Directory Access Protocol (LDAP) Schema for Storing Salted: Challenge Response Authentication Mechanism (SCRAM) Secrets: https://tools.ietf.org/html/rfc5803

HTTP:

• RFC7804: Salted Challenge Response HTTP Authentication Mechanism: https://tools.ietf.org/html/rfc7804

IANA:

• Simple Authentication and Security Layer (SASL) Mechanisms: https://www.iana.org/assignments/sasl-mechanisms/sasl-mechanisms.xhtml

Linked to:

• State of Play scram-sasl/info#1