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// Copyright 2023 The Sigstore Authors.
//
// 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 (
"crypto/x509"
"errors"
"time"
in_toto "github.com/in-toto/attestation/go/v1"
"github.com/secure-systems-lab/go-securesystemslib/dsse"
"github.com/sigstore/sigstore-go/pkg/root"
"github.com/sigstore/sigstore-go/pkg/tlog"
)
var errNotImplemented = errors.New("not implemented")
type HasInclusionPromise interface {
HasInclusionPromise() bool
}
type HasInclusionProof interface {
HasInclusionProof() bool
}
type SignatureProvider interface {
SignatureContent() (SignatureContent, error)
}
type SignedTimestampProvider interface {
Timestamps() ([][]byte, error)
}
type TlogEntryProvider interface {
TlogEntries() ([]*tlog.Entry, error)
}
type VerificationProvider interface {
VerificationContent() (VerificationContent, error)
}
type VersionProvider interface {
Version() (string, error)
}
type SignedEntity interface {
HasInclusionPromise
HasInclusionProof
SignatureProvider
SignedTimestampProvider
TlogEntryProvider
VerificationProvider
VersionProvider
}
type VerificationContent interface {
CompareKey(any, root.TrustedMaterial) bool
ValidAtTime(time.Time, root.TrustedMaterial) bool
Certificate() *x509.Certificate
PublicKey() PublicKeyProvider
}
type SignatureContent interface {
Signature() []byte
EnvelopeContent() EnvelopeContent
MessageSignatureContent() MessageSignatureContent
}
type PublicKeyProvider interface {
Hint() string
}
type MessageSignatureContent interface {
Digest() []byte
DigestAlgorithm() string
Signature() []byte
}
type EnvelopeContent interface {
RawEnvelope() *dsse.Envelope
Statement() (*in_toto.Statement, error)
}
// BaseSignedEntity is a helper struct that implements all the interfaces
// of SignedEntity. It can be embedded in a struct to implement the SignedEntity
// interface. This may be useful for testing, or for implementing a SignedEntity
// that only implements a subset of the interfaces.
type BaseSignedEntity struct{}
var _ SignedEntity = &BaseSignedEntity{}
func (b *BaseSignedEntity) HasInclusionPromise() bool {
return false
}
func (b *BaseSignedEntity) HasInclusionProof() bool {
return false
}
func (b *BaseSignedEntity) VerificationContent() (VerificationContent, error) {
return nil, errNotImplemented
}
func (b *BaseSignedEntity) SignatureContent() (SignatureContent, error) {
return nil, errNotImplemented
}
func (b *BaseSignedEntity) Timestamps() ([][]byte, error) {
return nil, errNotImplemented
}
func (b *BaseSignedEntity) TlogEntries() ([]*tlog.Entry, error) {
return nil, errNotImplemented
}
func (b *BaseSignedEntity) Version() (string, error) {
return "", errNotImplemented
}
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