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go/api/next/52221.txt
Filippo Valsorda d88d91e32e crypto/ecdh: new package
We use crypto/internal/edwards25519/field to implement X25519 directly,
so that golang.org/x/crypto/curve25519 can be dropped from the src
module dependencies, and eventually replaced with a crypto/ecdh wrapper,
removing the need to keep golang.org/x/crypto/curve25519/internal/field
in sync with crypto/internal/edwards25519/field.

In crypto/internal/nistec, we add BytesX to serialize only the x
coordinate, which we'll need for the horrible ECDSA x-coord-to-scalar
operation, too.

In crypto/tls, we replace the ECDHE implementation with crypto/ecdh,
dropping the X25519 special cases and related scaffolding.

Finally, FINALLY, we deprecate the ~white whale~ big.Int-based APIs of
the crypto/elliptic package.   •_•)   ( •_•)>⌐■-■   (⌐■_■)

Fixes #52182
Fixes #34648
Fixes #52221

Change-Id: Iccdda210319cc892e96bb28a0e7b7123551982c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/398914
Reviewed-by: Fernando Lobato Meeser <felobato@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-08-12 00:03:39 +00:00

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pkg crypto/ecdh, func P256() Curve #52221
pkg crypto/ecdh, func P384() Curve #52221
pkg crypto/ecdh, func P521() Curve #52221
pkg crypto/ecdh, func X25519() Curve #52221
pkg crypto/ecdh, method (*PrivateKey) Bytes() []uint8 #52221
pkg crypto/ecdh, method (*PrivateKey) Curve() Curve #52221
pkg crypto/ecdh, method (*PrivateKey) Equal(crypto.PrivateKey) bool #52221
pkg crypto/ecdh, method (*PrivateKey) Public() crypto.PublicKey #52221
pkg crypto/ecdh, method (*PrivateKey) PublicKey() *PublicKey #52221
pkg crypto/ecdh, method (*PublicKey) Bytes() []uint8 #52221
pkg crypto/ecdh, method (*PublicKey) Curve() Curve #52221
pkg crypto/ecdh, method (*PublicKey) Equal(crypto.PublicKey) bool #52221
pkg crypto/ecdh, type Curve interface, ECDH(*PrivateKey, *PublicKey) ([]uint8, error) #52221
pkg crypto/ecdh, type Curve interface, GenerateKey(io.Reader) (*PrivateKey, error) #52221
pkg crypto/ecdh, type Curve interface, NewPrivateKey([]uint8) (*PrivateKey, error) #52221
pkg crypto/ecdh, type Curve interface, NewPublicKey([]uint8) (*PublicKey, error) #52221
pkg crypto/ecdh, type Curve interface, unexported methods #52221
pkg crypto/ecdh, type PrivateKey struct #52221
pkg crypto/ecdh, type PublicKey struct #52221