Return wrapped errors

crypto/pem.go

@@ -6,15 +6,15 @@ import (
 	"crypto/rsa"
 	"crypto/x509"
 	"encoding/pem"
-	"errors"
 
 	jwt "github.com/dgrijalva/jwt-go"
+	"github.com/pkg/errors"
 )
 
 func EncodePublicKeyToPEM(key crypto.PublicKey) ([]byte, error) {
 	pub, err := x509.MarshalPKIXPublicKey(key)
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 	data := pem.EncodeToMemory(&pem.Block{
 		Type:  "PUBLIC KEY",
@@ -28,8 +28,6 @@ func DecodePEMToPublicKey(pem []byte) (crypto.PublicKey, error) {
 }
 
 func DecodePEMEncryptedPrivateKey(key []byte, passphrase []byte) (*rsa.PrivateKey, error) {
-	var err error
-
 	// Parse PEM block
 	var block *pem.Block
 	if block, _ = pem.Decode(key); block == nil {
@@ -38,12 +36,12 @@ func DecodePEMEncryptedPrivateKey(key []byte, passphrase []byte) (*rsa.PrivateKe
 
 	decryptedBlock, err := x509.DecryptPEMBlock(block, passphrase)
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 
 	var parsedKey interface{}
 	if parsedKey, err = x509.ParsePKCS1PrivateKey(decryptedBlock); err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 
 	var privateKey *rsa.PrivateKey
@@ -70,7 +68,7 @@ func EncodePrivateKeyToEncryptedPEM(key *rsa.PrivateKey, passphrase []byte) ([]b
 		block.Bytes, passphrase, x509.PEMCipherAES256,
 	)
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 
 	return pem.EncodeToMemory(block), nil

crypto/rsa.go

@@ -8,12 +8,13 @@ import (
 	peering "forge.cadoles.com/Cadoles/go-http-peering"
 
 	jwt "github.com/dgrijalva/jwt-go"
+	"github.com/pkg/errors"
 )
 
 func CreateRSAKey(bits int) (*rsa.PrivateKey, error) {
 	key, err := rsa.GenerateKey(rand.Reader, bits)
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 	return key, nil
 }
@@ -28,7 +29,7 @@ func CreateServerToken(privateKey *rsa.PrivateKey, issuer string, peerID peering
 	})
 	tokenStr, err := token.SignedString(privateKey)
 	if err != nil {
-		return "", err
+		return "", errors.WithStack(err)
 	}
 	return tokenStr, nil
 }