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// Copyright 2020 Google LLC All Rights Reserved.
//
// 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 verify
import (
"bytes"
"errors"
"fmt"
"io"
"strings"
"testing"
v1 "github.com/google/go-containerregistry/pkg/v1"
)
func mustHash(s string, t *testing.T) v1.Hash {
h, _, err := v1.SHA256(strings.NewReader(s))
if err != nil {
t.Fatalf("v1.SHA256(%s) = %v", s, err)
}
t.Logf("Hashed: %q -> %q", s, h)
return h
}
func TestVerificationFailure(t *testing.T) {
want := "This is the input string."
buf := bytes.NewBufferString(want)
verified, err := ReadCloser(io.NopCloser(buf), int64(len(want)), mustHash("not the same", t))
if err != nil {
t.Fatal("ReadCloser() =", err)
}
if b, err := io.ReadAll(verified); err == nil {
t.Errorf("ReadAll() = %q; want verification error", string(b))
}
}
func TestVerification(t *testing.T) {
want := "This is the input string."
buf := bytes.NewBufferString(want)
verified, err := ReadCloser(io.NopCloser(buf), int64(len(want)), mustHash(want, t))
if err != nil {
t.Fatal("ReadCloser() =", err)
}
if _, err := io.ReadAll(verified); err != nil {
t.Error("ReadAll() =", err)
}
}
func TestVerificationSizeUnknown(t *testing.T) {
want := "This is the input string."
buf := bytes.NewBufferString(want)
verified, err := ReadCloser(io.NopCloser(buf), SizeUnknown, mustHash(want, t))
if err != nil {
t.Fatal("ReadCloser() =", err)
}
if _, err := io.ReadAll(verified); err != nil {
t.Error("ReadAll() =", err)
}
}
func TestBadHash(t *testing.T) {
h := v1.Hash{
Algorithm: "fake256",
Hex: "whatever",
}
_, err := ReadCloser(io.NopCloser(strings.NewReader("hi")), 0, h)
if err == nil {
t.Errorf("ReadCloser() = %v, wanted err", err)
}
}
func TestBadSize(t *testing.T) {
want := "This is the input string."
// having too much content or expecting too much content returns an error.
for _, size := range []int64{3, 100} {
t.Run(fmt.Sprintf("expecting size %d", size), func(t *testing.T) {
buf := bytes.NewBufferString(want)
rc, err := ReadCloser(io.NopCloser(buf), size, mustHash(want, t))
if err != nil {
t.Fatal("ReadCloser() =", err)
}
if b, err := io.ReadAll(rc); err == nil {
t.Errorf("ReadAll() = %q; want verification error", string(b))
}
})
}
}
func TestDescriptor(t *testing.T) {
for _, tc := range []struct {
err error
desc v1.Descriptor
}{{
err: errors.New("error verifying descriptor; Data == nil"),
}, {
err: errors.New(`error verifying Digest; got "sha256:ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad", want ":"`),
desc: v1.Descriptor{
Data: []byte("abc"),
},
}, {
err: errors.New("error verifying Size; got 3, want 0"),
desc: v1.Descriptor{
Data: []byte("abc"),
Digest: v1.Hash{
Algorithm: "sha256",
Hex: "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
},
},
}, {
desc: v1.Descriptor{
Data: []byte("abc"),
Size: 3,
Digest: v1.Hash{
Algorithm: "sha256",
Hex: "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
},
},
}} {
got, want := Descriptor(tc.desc), tc.err
if got == nil {
if want != nil {
t.Errorf("Descriptor(): got nil, want %v", want)
}
} else if want == nil {
t.Errorf("Descriptor(): got %v, want nil", got)
} else if got, want := got.Error(), want.Error(); got != want {
t.Errorf("Descriptor(): got %q, want %q", got, want)
}
}
}
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