SCRAM
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简介
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SCRAM (Salted Challenge Response Authentication Mechanism) 是一套包含服务器和客户端双向确认的用户认证机制。

参考链接
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规范
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- `RFC 4422 Simple Authentication and Security Layer (SASL) <https://tools.ietf.org/html/rfc4422>`_
- `RFC 5802 Salted Challenge Response Authentication Mechanism (SCRAM) SASL and GSS-API Mechanisms <https://tools.ietf.org/html/rfc5802>`_
- `RFC 7677 SCRAM-SHA-256 and SCRAM-SHA-256-PLUS Simple Authentication and Security Layer (SASL) Mechanisms <https://tools.ietf.org/html/rfc7677>`_