| // Copyright 2019 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| package hybrid |
| |
| import ( |
| "bytes" |
| "testing" |
| |
| "github.com/google/tink/go/aead" |
| "github.com/google/tink/go/daead" |
| "github.com/google/tink/go/hybrid/subtle" |
| "github.com/google/tink/go/subtle/random" |
| tinkpb "github.com/google/tink/go/proto/tink_go_proto" |
| ) |
| |
| func basicMultipleEncrypts(t *testing.T, c string, k *tinkpb.KeyTemplate) { |
| t.Helper() |
| curve, err := subtle.GetCurve(c) |
| if err != nil { |
| t.Fatalf("error getting %s curve: %s ", c, err) |
| } |
| pvt, err := subtle.GenerateECDHKeyPair(curve) |
| if err != nil { |
| t.Fatalf("error generating ECDH key pair: %s", err) |
| } |
| salt := []byte("some salt") |
| pt := random.GetRandomBytes(20) |
| context := []byte("context info") |
| rDem, err := newRegisterECIESAEADHKDFDemHelper(k) |
| if err != nil { |
| t.Fatalf("error generating a DEM helper :%s", err) |
| } |
| e, err := subtle.NewECIESAEADHKDFHybridEncrypt(&pvt.PublicKey, salt, "SHA256", "UNCOMPRESSED", rDem) |
| if err != nil { |
| t.Fatalf("error generating an encryption construct :%s", err) |
| } |
| d, err := subtle.NewECIESAEADHKDFHybridDecrypt(pvt, salt, "SHA256", "UNCOMPRESSED", rDem) |
| if err != nil { |
| t.Fatalf("error generating an decryption construct :%s", err) |
| } |
| cl := [][]byte{} |
| for i := 0; i < 8; i++ { |
| ct, err := e.Encrypt(pt, context) |
| if err != nil { |
| t.Fatalf("encryption error :%s", err) |
| } |
| for _, c := range cl { |
| if bytes.Equal(ct, c) { |
| t.Fatalf("encryption is not randomized") |
| } |
| } |
| cl = append(cl, ct) |
| dt, err := d.Decrypt(ct, context) |
| if err != nil { |
| t.Fatalf("decryption error :%s", err) |
| } |
| if !bytes.Equal(dt, pt) { |
| t.Fatalf("decryption not inverse of encryption") |
| } |
| } |
| if len(cl) != 8 { |
| t.Errorf("randomized encryption check failed") |
| } |
| } |
| |
| func TestECAESCTRHMACSHA256Encrypt(t *testing.T) { |
| basicMultipleEncrypts(t, "NIST_P256", aead.AES256CTRHMACSHA256KeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P384", aead.AES256CTRHMACSHA256KeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P521", aead.AES256CTRHMACSHA256KeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P224", aead.AES256CTRHMACSHA256KeyTemplate()) |
| |
| basicMultipleEncrypts(t, "NIST_P256", aead.AES128CTRHMACSHA256KeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P384", aead.AES128CTRHMACSHA256KeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P521", aead.AES128CTRHMACSHA256KeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P224", aead.AES128CTRHMACSHA256KeyTemplate()) |
| } |
| |
| func TestECAES256GCMEncrypt(t *testing.T) { |
| basicMultipleEncrypts(t, "NIST_P256", aead.AES256GCMKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P384", aead.AES256GCMKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P521", aead.AES256GCMKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P224", aead.AES256GCMKeyTemplate()) |
| |
| basicMultipleEncrypts(t, "NIST_P256", aead.AES128GCMKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P384", aead.AES128GCMKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P521", aead.AES128GCMKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P224", aead.AES128GCMKeyTemplate()) |
| } |
| |
| func TestECAESSIVEncrypt(t *testing.T) { |
| basicMultipleEncrypts(t, "NIST_P256", daead.AESSIVKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P384", daead.AESSIVKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P521", daead.AESSIVKeyTemplate()) |
| basicMultipleEncrypts(t, "NIST_P224", daead.AESSIVKeyTemplate()) |
| } |