Esempio n. 1
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// LoadStatement loads and verifies a statement from an input stream.
func LoadStatement(r io.Reader, authority *x509.CertPool) (*Statement, error) {
	b, err := ioutil.ReadAll(r)
	if err != nil {
		return nil, err
	}
	js, err := libtrust.ParsePrettySignature(b, "signatures")
	if err != nil {
		return nil, err
	}
	payload, err := js.Payload()
	if err != nil {
		return nil, err
	}
	var statement Statement
	err = json.Unmarshal(payload, &statement.jsonStatement)
	if err != nil {
		return nil, err
	}

	if authority == nil {
		_, err = js.Verify()
		if err != nil {
			return nil, err
		}
	} else {
		_, err = js.VerifyChains(authority)
		if err != nil {
			return nil, err
		}
	}
	statement.signature = js

	return &statement, nil
}
Esempio n. 2
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// VerifyChains verifies the signature of the signed manifest against the
// certificate pool returning the list of verified chains. Signatures without
// an x509 chain are not checked.
func VerifyChains(sm *SignedManifest, ca *x509.CertPool) ([][]*x509.Certificate, error) {
	js, err := libtrust.ParsePrettySignature(sm.Raw, "signatures")
	if err != nil {
		return nil, err
	}

	return js.VerifyChains(ca)
}
Esempio n. 3
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// Verify verifies the signature of the signed manifest returning the public
// keys used during signing.
func Verify(sm *SignedManifest) ([]libtrust.PublicKey, error) {
	js, err := libtrust.ParsePrettySignature(sm.Raw, "signatures")
	if err != nil {
		logrus.WithField("err", err).Debugf("(*SignedManifest).Verify")
		return nil, err
	}

	return js.Verify()
}
Esempio n. 4
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// Signatures returns the signatures as provided by
// (*libtrust.JSONSignature).Signatures. The byte slices are opaque jws
// signatures.
func (sm *SignedManifest) Signatures() ([][]byte, error) {
	jsig, err := libtrust.ParsePrettySignature(sm.Raw, "signatures")
	if err != nil {
		return nil, err
	}

	// Resolve the payload in the manifest.
	return jsig.Signatures()
}