eciesgo

Elliptic Curve Integrated Encryption Scheme for secp256k1, written in Go with minimal dependencies.

This is the Go version of ecies/py with a built-in class-like secp256k1 API, you may go there for detailed documentation of the mechanism under the hood.

Install

go get github.com/ecies/go/v2

Go 1.13 is required cause fmt.Errorf is used to wrap errors.

⚠️ Please use version 2.0.3 and later. It's much faster and safer.

Quick Start

package main
import (
ecies "github.com/ecies/go/v2""log"
)
funcmain() {
k, err:=ecies.GenerateKey()
iferr!=nil {
panic(err)
}
log.Println("key pair has been generated")
ciphertext, err:=ecies.Encrypt(k.PublicKey, []byte("THIS IS THE TEST"))
iferr!=nil {
panic(err)
}
log.Printf("plaintext encrypted: %v\n", ciphertext)
plaintext, err:=ecies.Decrypt(k, ciphertext)
iferr!=nil {
panic(err)
}
log.Printf("ciphertext decrypted: %s\n", string(plaintext))
}

Benchmarks

With CGO:

goos: linux
goarch: amd64
pkg: github.com/ecies/go/v2
cpu: AMD Ryzen 7 5700G with Radeon Graphics BenchmarkEncrypt-16 12250 98122 ns/op 5185 B/op 61 allocs/op
BenchmarkDecrypt-16 23934 50046 ns/op 4097 B/op 46 allocs/op

Without CGO:

goos: linux
goarch: amd64
pkg: github.com/ecies/go/v2
cpu: AMD Ryzen 7 5700G with Radeon Graphics BenchmarkEncrypt-16 10000 112632 ns/op 5655 B/op 68 allocs/op
BenchmarkDecrypt-16 14038 85641 ns/op 4725 B/op 56 allocs/op