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crypto: add CFRG curves to Web Crypto API

Rodrigo Muino Tomonari requested to merge github/fork/panva/webcrypto-secure-curves into master

As per https://wicg.github.io/webcrypto-secure-curves and https://github.com/WICG/proposals/issues/46

This

  • Adds Ed25519, X25519, and X448 in full as described by https://wicg.github.io/webcrypto-secure-curves as of May 2022
  • Adds Ed448 as described by https://wicg.github.io/webcrypto-secure-curves as of May 2022 with the exception of its sign/verify optional context algorithm property which it only accepts as a zero-length value, otherwise throws "not implemented" due to lack of this option in the underlying C++ implementation.
  • removes NODE-ED25518 and NODE-ED448 algorithms (replaced by Ed25519 and Ed448)
  • removes NODE-X25519 and NODE-X448 ECDH namedCurve values (replaced by X25519 and X448 algorithms)
  • simplifies the webcrypto docs by utilizing the AlgorithmIdentifier "class". This means that other than the other NODE-* extensions the only "classes" documented follow the defined WebCryptoAPI dictionaries.

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