chore: vendor

vendor/github.com/theupdateframework/notary/cryptoservice/certificate.go

@@ -0,0 +1,41 @@
+package cryptoservice
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/x509"
+	"fmt"
+	"time"
+
+	"github.com/theupdateframework/notary/tuf/data"
+	"github.com/theupdateframework/notary/tuf/utils"
+)
+
+// GenerateCertificate generates an X509 Certificate from a template, given a GUN and validity interval
+func GenerateCertificate(rootKey data.PrivateKey, gun data.GUN, startTime, endTime time.Time) (*x509.Certificate, error) {
+	signer := rootKey.CryptoSigner()
+	if signer == nil {
+		return nil, fmt.Errorf("key type not supported for Certificate generation: %s", rootKey.Algorithm())
+	}
+
+	return generateCertificate(signer, gun, startTime, endTime)
+}
+
+func generateCertificate(signer crypto.Signer, gun data.GUN, startTime, endTime time.Time) (*x509.Certificate, error) {
+	template, err := utils.NewCertificate(gun.String(), startTime, endTime)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create the certificate template for: %s (%v)", gun, err)
+	}
+
+	derBytes, err := x509.CreateCertificate(rand.Reader, template, template, signer.Public(), signer)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create the certificate for: %s (%v)", gun, err)
+	}
+
+	cert, err := x509.ParseCertificate(derBytes)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse the certificate for key: %s (%v)", gun, err)
+	}
+
+	return cert, nil
+}