Add CSRF protection for HTTP Basic Authentication - #39
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HTTP Basic Authentication is vulnerable to CSRF attacks because browsers automatically attach cached credentials to requests. Implement the Signed Double-Submit Cookie pattern using HMAC-SHA256 signed tokens with per-user server-side secrets. This change also introduces a new cryptography module providing the HMAC-SHA256 implementation.
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HTTP Basic Authentication is vulnerable to CSRF attacks because browsers automatically attach cached credentials to requests. Implement the Signed Double-Submit Cookie pattern using HMAC-SHA256 signed tokens with per-user server-side secrets.
This change also introduces a new cryptography module providing the HMAC-SHA256 implementation.