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feat(sbom): add support for scanning a sbom attestation #2652
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ae0862b
feat(sbom): add support for scanning a sbom attestation
otms61 6a9cfb6
chore: excecute go mod tidy
otms61 8f38112
fix: fix goimports lint errors
otms61 c8e2a6b
feat: support for detecting attest xml
otms61 50727bb
refactor: move the predicate data access logic to attestation package
otms61 87b2d21
refacotr: rename cosign predicate data field
otms61 173b381
refactor: define our own Statement structure and remove the support f…
otms61 8e3d190
Merge branch 'main' into scan_sbom_attest
otms61 1be389e
refactor: fix the comment for Decode function
otms61 f461112
refactor: wrap the error by xerrors
otms61 b6cf89f
test: add a test for Decode attestaions
otms61 0921717
test: add a test for Inspect an SBOM attestation
otms61 031dd8f
refactor(cyclonedx): implement json.Unmarshaler
knqyf263 3e3438e
Merge branch 'refactor_sbom' into scan_sbom_attest
knqyf263 5838440
test(attestation): fix expected
knqyf263 e2b9200
Merge branch 'main' into scan_sbom_attest
knqyf263 5db9da3
refactor: remove cruft
knqyf263 03ae38e
test: add an integration test for scanning a sbom
otms61 bf6f0aa
docs: add a descrition for scanning sbom attestation
otms61 7219892
docs: update the cosign --type option
otms61 26cce23
refactor: use .intoto.jsonl extension
otms61 a0a8cf4
docs: use .intoto.jsonl extension
otms61 2393a0e
docs: respond to PR feedback
otms61 661b0eb
refactor: rename TestDecode to TestStatement_UnmarshalJSON
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package attestation | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/base64" | ||
| "encoding/json" | ||
| "io" | ||
|
|
||
| "github.com/in-toto/in-toto-golang/in_toto" | ||
| "github.com/secure-systems-lab/go-securesystemslib/dsse" | ||
| "golang.org/x/xerrors" | ||
| ) | ||
|
|
||
| // CosignPredicate specifies the format of the Custom Predicate. | ||
| // Cosign uses this structure when creating an SBOM attestation. | ||
| type CosignPredicate struct { | ||
| Data json.RawMessage | ||
| } | ||
|
|
||
| // Statement holds statement headers and the predicate. | ||
| type Statement struct { | ||
| PredicateType string `json:"predicateType"` | ||
|
|
||
| // Predicate contains type specific metadata. | ||
| Predicate CosignPredicate `json:"predicate"` | ||
| } | ||
|
|
||
| // Decode returns the statement from the attestation. | ||
| func Decode(r io.Reader) (Statement, error) { | ||
|
|
||
| var envelope dsse.Envelope | ||
| err := json.NewDecoder(r).Decode(&envelope) | ||
| if err != nil { | ||
| return Statement{}, xerrors.Errorf("failed to decode as a dsse envelope: %w", err) | ||
| } | ||
| if envelope.PayloadType != in_toto.PayloadType { | ||
| return Statement{}, xerrors.Errorf("invalid attestation payload type: %s", envelope.PayloadType) | ||
| } | ||
|
|
||
| decoded, err := base64.StdEncoding.DecodeString(envelope.Payload) | ||
| if err != nil { | ||
| return Statement{}, xerrors.Errorf("failed to decode attestation payload: %w", err) | ||
| } | ||
|
|
||
| var st Statement | ||
| err = json.NewDecoder(bytes.NewReader(decoded)).Decode(&st) | ||
| if err != nil { | ||
| return Statement{}, xerrors.Errorf("failed to decode attestation payload as in-toto statement: %w", err) | ||
| } | ||
|
|
||
| return st, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package attestation | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "io" | ||
|
|
||
| "golang.org/x/xerrors" | ||
|
|
||
| "github.com/aquasecurity/trivy/pkg/attestation" | ||
| "github.com/aquasecurity/trivy/pkg/sbom" | ||
| ) | ||
|
|
||
| type Unmarshaler struct { | ||
| predicateUnmarshaler sbom.Unmarshaler | ||
| } | ||
|
|
||
| func (u Unmarshaler) Unmarshal(r io.Reader) (sbom.SBOM, error) { | ||
| attest, err := attestation.Decode(r) | ||
| if err != nil { | ||
| return sbom.SBOM{}, xerrors.Errorf("failed to decode attestation: %w", err) | ||
| } | ||
|
|
||
| return u.predicateUnmarshaler.Unmarshal(bytes.NewReader(attest.Predicate.Data)) | ||
| } | ||
|
|
||
| func NewUnmarshaler(predicateUnmarshaler sbom.Unmarshaler) sbom.Unmarshaler { | ||
| return &Unmarshaler{ | ||
| predicateUnmarshaler: predicateUnmarshaler, | ||
| } | ||
| } | ||
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Could you wrap the error by
xerrorsif it is returned? It adds stack trace and helps us debug.There was a problem hiding this comment.
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Done