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https://github.com/btcsuite/btcd.git
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87e8fe92c9
In this commit, we turn the package into a new Go module (version 2), and then port over the current set of types and functions to mainly alias to the more optimized and maintained dcrec variant. Taking a look at the benchmarks, most operations other than normalization (which IIRC is a bit slower now due to constant time fixes) enjoy some nice speeds up: ``` benchcmp is deprecated in favor of benchstat: https://pkg.go.dev/golang.org/x/perf/cmd/benchstat benchmark old ns/op new ns/op delta BenchmarkAddJacobian-8 464 328 -29.20% BenchmarkAddJacobianNotZOne-8 1138 372 -67.27% BenchmarkScalarBaseMult-8 47336 31531 -33.39% BenchmarkScalarBaseMultLarge-8 42465 32057 -24.51% BenchmarkScalarMult-8 123355 117579 -4.68% BenchmarkNAF-8 582 168 -71.12% BenchmarkSigVerify-8 175414 120794 -31.14% BenchmarkFieldNormalize-8 23.8 24.4 +2.39% BenchmarkParseCompressedPubKey-8 24282 10907 -55.08% ```
17 lines
555 B
Go
17 lines
555 B
Go
// Copyright (c) 2015-2016 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package btcec
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import (
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secp "github.com/decred/dcrd/dcrec/secp256k1/v4"
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)
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// GenerateSharedSecret generates a shared secret based on a private key and a
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// public key using Diffie-Hellman key exchange (ECDH) (RFC 4753).
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// RFC5903 Section 9 states we should only return x.
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func GenerateSharedSecret(privkey *PrivateKey, pubkey *PublicKey) []byte {
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return secp.GenerateSharedSecret(privkey, pubkey)
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}
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