1// Copyright 2022 Google LLC 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14// 15//////////////////////////////////////////////////////////////////////////////// 16 17package hpke 18 19import ( 20 "bytes" 21 "fmt" 22 "testing" 23) 24 25func TestAESGCMAEADSealOpen(t *testing.T) { 26 i := 0 27 vecs := aeadRFCVectors(t) 28 for k, v := range vecs { 29 if k.aeadID != aes128GCM && k.aeadID != aes256GCM { 30 continue 31 } 32 33 i++ 34 t.Run(fmt.Sprintf("%d", k.id), func(t *testing.T) { 35 { 36 aead, err := newAEAD(k.aeadID) 37 if err != nil { 38 t.Fatalf("newAEAD(%d): got err %q, want success", k.aeadID, err) 39 } 40 41 ciphertext, err := aead.seal(v.key, v.nonce, v.plaintext, v.associatedData) 42 if err != nil { 43 t.Fatalf("seal: got err %q, want success", err) 44 } 45 if !bytes.Equal(ciphertext, v.ciphertext) { 46 t.Errorf("seal: got %x, want %x", ciphertext, v.ciphertext) 47 } 48 49 plaintext, err := aead.open(v.key, v.nonce, v.ciphertext, v.associatedData) 50 if err != nil { 51 t.Fatalf("open: got err %q, want success", err) 52 } 53 if !bytes.Equal(plaintext, v.plaintext) { 54 t.Errorf("open: got %x, want %x", plaintext, v.plaintext) 55 } 56 } 57 58 // Test exactly as above, except instantiate aesGcmHpkeAead with a key 59 // length that does not match the length of the key passed into seal and 60 // open. 61 { 62 var wrongID uint16 63 switch k.aeadID { 64 case aes128GCM: 65 wrongID = aes256GCM 66 case aes256GCM: 67 wrongID = aes128GCM 68 default: 69 t.Fatalf("AEAD ID %d is not supported", k.aeadID) 70 } 71 aead, err := newAEAD(wrongID) 72 if err != nil { 73 t.Fatalf("newAEAD(%d): got err %q, want success", wrongID, err) 74 } 75 76 if _, err := aead.seal(v.key, v.nonce, v.plaintext, v.associatedData); err == nil { 77 t.Error("seal with unexpected key length: got success, want err") 78 } 79 if _, err := aead.open(v.key, v.nonce, v.ciphertext, v.associatedData); err == nil { 80 t.Error("open with unexpected key length: got success, want err") 81 } 82 } 83 }) 84 } 85 if i < 2 { 86 t.Errorf("number of vectors tested = %d, want > %d", i, 2) 87 } 88} 89