| // Copyright 2022 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 hpke |
| |
| import ( |
| "bytes" |
| "fmt" |
| "testing" |
| ) |
| |
| func TestAESGCMAEADSealOpen(t *testing.T) { |
| i := 0 |
| vecs := aeadRFCVectors(t) |
| for k, v := range vecs { |
| if k.aeadID != aes128GCM && k.aeadID != aes256GCM { |
| continue |
| } |
| |
| i++ |
| t.Run(fmt.Sprintf("%d", k.id), func(t *testing.T) { |
| { |
| aead, err := newAEAD(k.aeadID) |
| if err != nil { |
| t.Fatalf("newAEAD(%d): got err %q, want success", k.aeadID, err) |
| } |
| |
| ciphertext, err := aead.seal(v.key, v.nonce, v.plaintext, v.associatedData) |
| if err != nil { |
| t.Fatalf("seal: got err %q, want success", err) |
| } |
| if !bytes.Equal(ciphertext, v.ciphertext) { |
| t.Errorf("seal: got %x, want %x", ciphertext, v.ciphertext) |
| } |
| |
| plaintext, err := aead.open(v.key, v.nonce, v.ciphertext, v.associatedData) |
| if err != nil { |
| t.Fatalf("open: got err %q, want success", err) |
| } |
| if !bytes.Equal(plaintext, v.plaintext) { |
| t.Errorf("open: got %x, want %x", plaintext, v.plaintext) |
| } |
| } |
| |
| // Test exactly as above, except instantiate aesGcmHpkeAead with a key |
| // length that does not match the length of the key passed into seal and |
| // open. |
| { |
| var wrongID uint16 |
| switch k.aeadID { |
| case aes128GCM: |
| wrongID = aes256GCM |
| case aes256GCM: |
| wrongID = aes128GCM |
| default: |
| t.Fatalf("AEAD ID %d is not supported", k.aeadID) |
| } |
| aead, err := newAEAD(wrongID) |
| if err != nil { |
| t.Fatalf("newAEAD(%d): got err %q, want success", wrongID, err) |
| } |
| |
| if _, err := aead.seal(v.key, v.nonce, v.plaintext, v.associatedData); err == nil { |
| t.Error("seal with unexpected key length: got success, want err") |
| } |
| if _, err := aead.open(v.key, v.nonce, v.ciphertext, v.associatedData); err == nil { |
| t.Error("open with unexpected key length: got success, want err") |
| } |
| } |
| }) |
| } |
| if i < 2 { |
| t.Errorf("number of vectors tested = %d, want > %d", i, 2) |
| } |
| } |