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Generalises PBKDF2 over the digest context like HMAC, keeping the SHA-1 aliases WPA2 uses. HKDF and AES-CCM are pure D on the existing HMAC and AES-ECB primitives so they work on every target. All three carry their RFC vectors. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Affine point add/double/multiply and 256-bit modular helpers in pure D, for protocols such as SPAKE2+ that need raw point operations the mbedTLS shim and BCrypt do not expose. Not constant-time; documented as such. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Removes the per-step field inversion from scalar multiplication; the affine add and double stay for callers that need them. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Crypto primitives needed by the Matter work in open-watt/openwatt#673. All pure D on the existing HMAC/SHA-256/AES-ECB so they run on every target. Each module carries RFC test vectors or a round-trip test. P-256 is affine and not constant-time (documented); Jacobian coordinates are a follow-up once the SPAKE2+ flow is proven end to end.
Draft: opened for CI.
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