fix go lint

Signed-off-by: Jessica Frazelle <acidburn@docker.com>
Signed-off-by: David Lawrence <david.lawrence@docker.com>

Signed-off-by: Jessica Frazelle <acidburn@docker.com> (github: endophage)

keystoremanager/keystoremanager.go

@@ -25,6 +25,7 @@ type KeyStoreManager struct {
 
 const (
 	trustDir = "trusted_certificates"
+	// PrivDir is the name of the private directory
 	PrivDir        = "private"
 	rsaRootKeySize = 4096 // Used for new root keys
 )

tuf/data/keys.go

@@ -486,18 +486,22 @@ func (k UnknownPrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOp
 	return nil, errors.New("Unknown key type, cannot sign.")
 }
 
+// SignatureAlgorithm returns the SigAlgorithm for a ECDSAPrivateKey
 func (k ECDSAPrivateKey) SignatureAlgorithm() SigAlgorithm {
 	return ECDSASignature
 }
 
+// SignatureAlgorithm returns the SigAlgorithm for a RSAPrivateKey
 func (k RSAPrivateKey) SignatureAlgorithm() SigAlgorithm {
 	return RSAPSSSignature
 }
 
+// SignatureAlgorithm returns the SigAlgorithm for a ED25519PrivateKey
 func (k ED25519PrivateKey) SignatureAlgorithm() SigAlgorithm {
 	return EDDSASignature
 }
 
+// SignatureAlgorithm returns the SigAlgorithm for an UnknownPrivateKey
 func (k UnknownPrivateKey) SignatureAlgorithm() SigAlgorithm {
 	return ""
 }