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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| // Copyright 2022 The Witness Contributors | ||
| // | ||
| // 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 sarif | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
| "strings" | ||
|
|
||
| "github.com/owenrumney/go-sarif/sarif" | ||
| "github.com/testifysec/witness/pkg/attestation" | ||
| "github.com/testifysec/witness/pkg/cryptoutil" | ||
| ) | ||
|
|
||
| const ( | ||
| Name = "sarif" | ||
| Type = "https://witness.testifysec.com/attestations/sarif/v0.1" | ||
| RunType = attestation.PostRunType | ||
| ) | ||
|
|
||
| var mimeTypes = []string{"text/plain", "application/json"} | ||
|
|
||
| func init() { | ||
| attestation.RegisterAttestation(Name, Type, RunType, func() attestation.Attestor { | ||
| return New() | ||
| }) | ||
| } | ||
|
|
||
| type Attestor struct { | ||
| sarif.Report `json:"report"` | ||
| ReportFile string `json:"reportFileName"` | ||
| ReportDigestSet cryptoutil.DigestSet `json:"reportDigestSet"` | ||
| } | ||
|
|
||
| func New() *Attestor { | ||
| return &Attestor{} | ||
| } | ||
|
|
||
| func (a *Attestor) Name() string { | ||
| return Name | ||
| } | ||
|
|
||
| func (a *Attestor) Type() string { | ||
| return Type | ||
| } | ||
|
|
||
| func (a *Attestor) RunType() attestation.RunType { | ||
| return RunType | ||
| } | ||
|
|
||
| func (a *Attestor) Attest(ctx *attestation.AttestationContext) error { | ||
| if err := a.getCanidate(ctx); err != nil { | ||
| fmt.Printf("error getting canidate: %s\n", err) | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (a *Attestor) getCanidate(ctx *attestation.AttestationContext) error { | ||
| products := ctx.Products() | ||
|
|
||
| if len(products) == 0 { | ||
| return fmt.Errorf("no products to attest") | ||
| } | ||
|
|
||
| for path, product := range products { | ||
| for _, mimeType := range mimeTypes { | ||
| if !strings.Contains(mimeType, product.MimeType) { | ||
| continue | ||
| } | ||
| } | ||
|
|
||
| newDigestSet, err := cryptoutil.CalculateDigestSetFromFile(path, ctx.Hashes()) | ||
| if newDigestSet == nil || err != nil { | ||
| return fmt.Errorf("error calculating digest set from file: %s", path) | ||
| } | ||
|
|
||
| if !newDigestSet.Equal(product.Digest) { | ||
| return fmt.Errorf("integrity error: product digest set does not match canidate digest set") | ||
| } | ||
|
|
||
| f, err := os.Open(path) | ||
| if err != nil { | ||
| return fmt.Errorf("error opening file: %s", path) | ||
| } | ||
|
|
||
| reportBytes, err := ioutil.ReadAll(f) | ||
| if err != nil { | ||
| return fmt.Errorf("error reading file: %s", path) | ||
| } | ||
|
|
||
| //check to see if we can unmarshal into sarif type | ||
| if err := json.Unmarshal(reportBytes, &a.Report); err != nil { | ||
| fmt.Printf("error unmarshaling report: %s\n", err) | ||
| continue | ||
| } | ||
|
|
||
| a.ReportFile = path | ||
| a.ReportDigestSet = product.Digest | ||
|
|
||
| return nil | ||
| } | ||
| return fmt.Errorf("no sarif file found") | ||
| } |