chore(ci): fix lint findings

.golangci.yml

@@ -1,14 +1,14 @@
 run:
   timeout: 5m
   tests: false
-  skip-files:
+
+issues:
+  exclude-files:
     - "testing.go"
     - ".*\\.pb\\.go"
     - ".*\\.gen\\.go"
 
 linters-settings:
-  golint:
-    min-confidence: 0
   goconst:
     min-len: 5
     min-occurrences: 4

v3/helpers.go

@@ -63,7 +63,7 @@ func kdf(key *LocalKey, n []byte) (ek, n2, ak []byte, err error) {
 
 func mac(ak, h, n, c, f, i []byte) []byte {
 	// Compute pre-authentication message
-	preAuth := common.PreAuthenticationEncoding([]byte(h), n, c, f, i)
+	preAuth := common.PreAuthenticationEncoding(h, n, c, f, i)
 
 	// Compute MAC
 	mac := hmac.New(sha512.New384, ak)

v3/internal/rfc6979/ecdsa.go

@@ -58,7 +58,7 @@ func SignECDSA(priv *ecdsa.PrivateKey, digest []byte, alg func() hash.Hash) (r,
 	return
 }
 
-// copied from crypto/ecdsa
+// copied from crypto/ecdsa.
 func hashToInt(digest []byte, c elliptic.Curve) *big.Int {
 	orderBits := c.Params().N.BitLen()
 	orderBytes := (orderBits + 7) / 8

v3/local.go

@@ -111,14 +111,14 @@ func Encrypt(r io.Reader, key *LocalKey, m, f, i []byte) (string, error) {
 	if len(f) > 0 {
 		final[9+tokenLen-footerLen] = '.'
 		// Encode footer as RawURLBase64
-		base64.RawURLEncoding.Encode(final[9+tokenLen-footerLen+1:], []byte(f))
+		base64.RawURLEncoding.Encode(final[9+tokenLen-footerLen+1:], f)
 	}
 
 	// No error
 	return string(final), nil
 }
 
-// PASETO v3 symmetric decryption primitive
+// PASETO v3 symmetric decryption primitive.
 // https://github.com/paseto-standard/paseto-spec/blob/master/docs/01-Protocol-Versions/Version3.md#decrypt
 func Decrypt(key *LocalKey, token string, f, i []byte) ([]byte, error) {
 	// Check arguments