Slightly refactored error messages

[gogost.git] / gost3410 / vko2012.go

diff --git a/gost3410/vko2012.go b/gost3410/vko2012.go
index b4527685492358ee72deb3306e2662ea3d68c47b..0875e1944df8355caf35a663f693934f7b18873c 100644 (file)
--- a/gost3410/vko2012.go
+++ b/gost3410/vko2012.go
@@ -16,6 +16,7 @@
 package gost3410
 
 import (
+       "fmt"
        "math/big"
 
        "go.cypherpunks.ru/gogost/v5/gost34112012256"
@@ -27,11 +28,11 @@ import (
 func (prv *PrivateKey) KEK2012256(pub *PublicKey, ukm *big.Int) ([]byte, error) {
        key, err := prv.KEK(pub, ukm)
        if err != nil {
-               return nil, err
+               return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
        }
        h := gost34112012256.New()
        if _, err = h.Write(key); err != nil {
-               return nil, err
+               return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
        }
        return h.Sum(key[:0]), nil
 }
@@ -41,11 +42,11 @@ func (prv *PrivateKey) KEK2012256(pub *PublicKey, ukm *big.Int) ([]byte, error)
 func (prv *PrivateKey) KEK2012512(pub *PublicKey, ukm *big.Int) ([]byte, error) {
        key, err := prv.KEK(pub, ukm)
        if err != nil {
-               return nil, err
+               return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
        }
        h := gost34112012512.New()
        if _, err = h.Write(key); err != nil {
-               return nil, err
+               return nil, fmt.Errorf("gogost/gost3410.PrivateKey.KEK2012256: %w", err)
        }
        return h.Sum(key[:0]), nil
 }