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predicate.go
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predicate.go
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//
// Copyright 2021 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 options
import (
"fmt"
"net/url"
slsa "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/v0.2"
"github.com/in-toto/in-toto-golang/in_toto"
"github.com/spf13/cobra"
"github.com/sigstore/cosign/v2/pkg/cosign/attestation"
)
const (
PredicateCustom = "custom"
PredicateSLSA = "slsaprovenance"
PredicateSPDX = "spdx"
PredicateSPDXJSON = "spdxjson"
PredicateCycloneDX = "cyclonedx"
PredicateLink = "link"
PredicateVuln = "vuln"
)
// PredicateTypeMap is the mapping between the predicate `type` option to predicate URI.
var PredicateTypeMap = map[string]string{
PredicateCustom: attestation.CosignCustomProvenanceV01,
PredicateSLSA: slsa.PredicateSLSAProvenance,
PredicateSPDX: in_toto.PredicateSPDX,
PredicateSPDXJSON: in_toto.PredicateSPDX,
PredicateCycloneDX: in_toto.PredicateCycloneDX,
PredicateLink: in_toto.PredicateLinkV1,
PredicateVuln: attestation.CosignVulnProvenanceV01,
}
// PredicateOptions is the wrapper for predicate related options.
type PredicateOptions struct {
Type string
}
var _ Interface = (*PredicateOptions)(nil)
// AddFlags implements Interface
func (o *PredicateOptions) AddFlags(cmd *cobra.Command) {
cmd.Flags().StringVar(&o.Type, "type", "custom",
"specify a predicate type (slsaprovenance|link|spdx|spdxjson|cyclonedx|vuln|custom) or an URI")
}
// ParsePredicateType parses the predicate `type` flag passed into a predicate URI, or validates `type` is a valid URI.
func ParsePredicateType(t string) (string, error) {
uri, ok := PredicateTypeMap[t]
if !ok {
if _, err := url.ParseRequestURI(t); err != nil {
return "", fmt.Errorf("invalid predicate type: %s", t)
}
uri = t
}
return uri, nil
}
// PredicateLocalOptions is the wrapper for predicate related options.
type PredicateLocalOptions struct {
PredicateOptions
Path string
}
var _ Interface = (*PredicateLocalOptions)(nil)
// AddFlags implements Interface
func (o *PredicateLocalOptions) AddFlags(cmd *cobra.Command) {
o.PredicateOptions.AddFlags(cmd)
cmd.Flags().StringVar(&o.Path, "predicate", "",
"path to the predicate file.")
_ = cmd.MarkFlagRequired("predicate")
}
// PredicateRemoteOptions is the wrapper for remote predicate related options.
type PredicateRemoteOptions struct {
PredicateOptions
}
var _ Interface = (*PredicateRemoteOptions)(nil)
// AddFlags implements Interface
func (o *PredicateRemoteOptions) AddFlags(cmd *cobra.Command) {
o.PredicateOptions.AddFlags(cmd)
}