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// Copyright 2020 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 prf_test
import (
"bytes"
"testing"
"github.com/tink-crypto/tink-go/v2/keyset"
"github.com/tink-crypto/tink-go/v2/prf"
tinkpb "github.com/tink-crypto/tink-go/v2/proto/tink_go_proto"
)
func TestKeyTemplates(t *testing.T) {
var testCases = []struct {
name string
template *tinkpb.KeyTemplate
}{
{name: "HMAC_SHA256_PRF",
template: prf.HMACSHA256PRFKeyTemplate()},
{name: "HMAC_SHA512_PRF",
template: prf.HMACSHA512PRFKeyTemplate()},
{name: "HKDF_SHA256",
template: prf.HKDFSHA256PRFKeyTemplate()},
{name: "AES_CMAC_PRF",
template: prf.AESCMACPRFKeyTemplate()},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
handle, err := keyset.NewHandle(tc.template)
if err != nil {
t.Errorf("keyset.NewHandle(tc.template) failed: %s", err)
}
prfset, err := prf.NewPRFSet(handle)
if err != nil {
t.Errorf("prf.NewPRFSet(handle) failed: %s", err)
}
var testInputs = []struct {
message1 []byte
message2 []byte
}{
{
message1: []byte("this data needs to be authenticated"),
message2: []byte("this data needs to be authenticated"),
}, {
message1: []byte(""),
message2: []byte(""),
}, {
message1: []byte(""),
message2: nil,
}, {
message1: nil,
message2: []byte(""),
}, {
message1: nil,
message2: nil,
},
}
for _, ti := range testInputs {
output, err := prfset.ComputePrimaryPRF(ti.message1, 16)
if err != nil {
t.Errorf("prfset.ComputePrimaryPRF(ti.message1, 16) failed: %s", err)
}
if len(output) != 16 {
t.Errorf("len(output) = %d, want 16", len(output))
}
output2, err := prfset.ComputePrimaryPRF(ti.message2, 16)
if err != nil {
t.Errorf("prfset.ComputePrimaryPRF(ti.message2, 16) failed: %s", err)
}
if !bytes.Equal(output2, output) {
t.Errorf("equivalent inputs did not produce equivalent outputs, got: %q, want: %q", output2, output)
}
}
})
}
}
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