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Tighten RFC 7804 SCRAM message validation. - #897
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This change tightens SCRAM-SHA-256 validation for the initial authentication exchange according to RFC 5802, RFC 7677 and RFC 7804. It adds stricter validation of SCRAM message structure and attributes, canonical Base64 encoding, strict UTF-8 decoding, duplicate parameter detection, and RFC-compliant handling of password preparation.
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This change tightens SCRAM-SHA-256 validation for the initial authentication exchange according to RFC 5802, RFC 7677 and RFC 7804.
It adds stricter validation of SCRAM message structure and attributes, canonical Base64 encoding, strict UTF-8 decoding, duplicate parameter detection, and RFC-compliant handling of password preparation.