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