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|
package hpke_test
import (
"bytes"
"crypto/rand"
"fmt"
"testing"
"github.com/cloudflare/circl/hpke"
)
func Example() {
// import "github.com/cloudflare/circl/hpke"
// import "crypto/rand"
// HPKE suite is a domain parameter.
kemID := hpke.KEM_P384_HKDF_SHA384
kdfID := hpke.KDF_HKDF_SHA384
aeadID := hpke.AEAD_AES256GCM
suite := hpke.NewSuite(kemID, kdfID, aeadID)
info := []byte("public info string, known to both Alice and Bob")
// Bob prepares to receive messages and announces his public key.
publicBob, privateBob, err := kemID.Scheme().GenerateKeyPair()
if err != nil {
panic(err)
}
Bob, err := suite.NewReceiver(privateBob, info)
if err != nil {
panic(err)
}
// Alice gets Bob's public key.
Alice, err := suite.NewSender(publicBob, info)
if err != nil {
panic(err)
}
enc, sealer, err := Alice.Setup(rand.Reader)
if err != nil {
panic(err)
}
// Alice encrypts some plaintext and sends the ciphertext to Bob.
ptAlice := []byte("text encrypted to Bob's public key")
aad := []byte("additional public data")
ct, err := sealer.Seal(ptAlice, aad)
if err != nil {
panic(err)
}
// Bob decrypts the ciphertext.
opener, err := Bob.Setup(enc)
if err != nil {
panic(err)
}
ptBob, err := opener.Open(ct, aad)
if err != nil {
panic(err)
}
// Plaintext was sent successfully.
fmt.Println(bytes.Equal(ptAlice, ptBob))
// Output: true
}
func runHpkeBenchmark(b *testing.B, kem hpke.KEM, kdf hpke.KDF, aead hpke.AEAD) {
suite := hpke.NewSuite(kem, kdf, aead)
pkR, skR, err := kem.Scheme().GenerateKeyPair()
if err != nil {
b.Fatal(err)
}
info := []byte("public info string")
sender, err := suite.NewSender(pkR, info)
if err != nil {
b.Fatal(err)
}
b.Run(fmt.Sprintf("SetupSender-%04x-%04x-%04x", kem, kdf, aead), func(b *testing.B) {
for i := 0; i < b.N; i++ {
_, _, err = sender.Setup(rand.Reader)
if err != nil {
b.Fatal(err)
}
}
})
enc, _, err := sender.Setup(rand.Reader)
if err != nil {
b.Fatal(err)
}
receiver, err := suite.NewReceiver(skR, info)
if err != nil {
b.Fatal(err)
}
b.Run(fmt.Sprintf("SetupReceiver-%04x-%04x-%04x", kem, kdf, aead), func(b *testing.B) {
for i := 0; i < b.N; i++ {
_, err := receiver.Setup(enc)
if err != nil {
b.Fatal(err)
}
}
})
b.Run(fmt.Sprintf("Encrypt-%04x-%04x-%04x", kem, kdf, aead), func(b *testing.B) {
pt := []byte("plaintext")
aad := []byte("additional authenticated data")
cts := make([][]byte, b.N)
_, sealer, err := sender.Setup(rand.Reader)
if err != nil {
b.Fatal(err)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
cts[i], err = sealer.Seal(pt, aad)
if err != nil {
b.Fatal(err)
}
}
})
b.Run(fmt.Sprintf("Decrypt-%04x-%04x-%04x", kem, kdf, aead), func(b *testing.B) {
pt := []byte("plaintext")
aad := []byte("additional authenticated data")
cts := make([][]byte, b.N)
enc, sealer, err := sender.Setup(rand.Reader)
if err != nil {
b.Fatal(err)
}
opener, err := receiver.Setup(enc)
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
cts[i], err = sealer.Seal(pt, aad)
if err != nil {
b.Fatal(err)
}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, err = opener.Open(cts[i], aad)
if err != nil {
b.Log(i)
b.Fatal(err)
}
}
})
}
func BenchmarkHpkeRoundTrip(b *testing.B) {
tests := []struct {
kem hpke.KEM
kdf hpke.KDF
aead hpke.AEAD
}{
{hpke.KEM_P256_HKDF_SHA256, hpke.KDF_HKDF_SHA256, hpke.AEAD_AES128GCM},
{hpke.KEM_P384_HKDF_SHA384, hpke.KDF_HKDF_SHA384, hpke.AEAD_AES256GCM},
{hpke.KEM_P521_HKDF_SHA512, hpke.KDF_HKDF_SHA512, hpke.AEAD_AES256GCM},
{hpke.KEM_X25519_HKDF_SHA256, hpke.KDF_HKDF_SHA256, hpke.AEAD_AES128GCM},
{hpke.KEM_X25519_KYBER768_DRAFT00, hpke.KDF_HKDF_SHA256, hpke.AEAD_AES128GCM},
{hpke.KEM_XWING, hpke.KDF_HKDF_SHA256, hpke.AEAD_AES128GCM},
}
for _, test := range tests {
runHpkeBenchmark(b, test.kem, test.kdf, test.aead)
}
}
|
