Switch to github.com/golang/dep for vendoring

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/github.com/docker/libtrust/testutil/certificates.go

@@ -0,0 +1,94 @@
+package testutil
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"math/big"
+	"time"
+)
+
+// GenerateTrustCA generates a new certificate authority for testing.
+func GenerateTrustCA(pub crypto.PublicKey, priv crypto.PrivateKey) (*x509.Certificate, error) {
+	cert := &x509.Certificate{
+		SerialNumber: big.NewInt(0),
+		Subject: pkix.Name{
+			CommonName: "CA Root",
+		},
+		NotBefore:             time.Now().Add(-time.Second),
+		NotAfter:              time.Now().Add(time.Hour),
+		IsCA:                  true,
+		KeyUsage:              x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
+		BasicConstraintsValid: true,
+	}
+
+	certDER, err := x509.CreateCertificate(rand.Reader, cert, cert, pub, priv)
+	if err != nil {
+		return nil, err
+	}
+
+	cert, err = x509.ParseCertificate(certDER)
+	if err != nil {
+		return nil, err
+	}
+
+	return cert, nil
+}
+
+// GenerateIntermediate generates an intermediate certificate for testing using
+// the parent certificate (likely a CA) and the provided keys.
+func GenerateIntermediate(key crypto.PublicKey, parentKey crypto.PrivateKey, parent *x509.Certificate) (*x509.Certificate, error) {
+	cert := &x509.Certificate{
+		SerialNumber: big.NewInt(0),
+		Subject: pkix.Name{
+			CommonName: "Intermediate",
+		},
+		NotBefore:             time.Now().Add(-time.Second),
+		NotAfter:              time.Now().Add(time.Hour),
+		IsCA:                  true,
+		KeyUsage:              x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
+		BasicConstraintsValid: true,
+	}
+
+	certDER, err := x509.CreateCertificate(rand.Reader, cert, parent, key, parentKey)
+	if err != nil {
+		return nil, err
+	}
+
+	cert, err = x509.ParseCertificate(certDER)
+	if err != nil {
+		return nil, err
+	}
+
+	return cert, nil
+}
+
+// GenerateTrustCert generates a new trust certificate for testing.  Unlike the
+// intermediate certificates, this certificate should  be used for signature
+// only, not creating certificates.
+func GenerateTrustCert(key crypto.PublicKey, parentKey crypto.PrivateKey, parent *x509.Certificate) (*x509.Certificate, error) {
+	cert := &x509.Certificate{
+		SerialNumber: big.NewInt(0),
+		Subject: pkix.Name{
+			CommonName: "Trust Cert",
+		},
+		NotBefore:             time.Now().Add(-time.Second),
+		NotAfter:              time.Now().Add(time.Hour),
+		IsCA:                  true,
+		KeyUsage:              x509.KeyUsageDigitalSignature,
+		BasicConstraintsValid: true,
+	}
+
+	certDER, err := x509.CreateCertificate(rand.Reader, cert, parent, key, parentKey)
+	if err != nil {
+		return nil, err
+	}
+
+	cert, err = x509.ParseCertificate(certDER)
+	if err != nil {
+		return nil, err
+	}
+
+	return cert, nil
+}