refactor: remove utils pkg

BREAKING CHANGE: utils package has been removed in favor of specific new
packages (http, crypto, strings)

pkg/utils/hash.go

@@ -1,38 +0,0 @@
-package utils
-
-import (
-	"crypto/sha256"
-	"crypto/sha512"
-	"encoding/base64"
-	"fmt"
-	"hash"
-
-	"gopkg.in/square/go-jose.v2"
-)
-
-func GetHashAlgorithm(sigAlgorithm jose.SignatureAlgorithm) (hash.Hash, error) {
-	switch sigAlgorithm {
-	case jose.RS256, jose.ES256, jose.PS256:
-		return sha256.New(), nil
-	case jose.RS384, jose.ES384, jose.PS384:
-		return sha512.New384(), nil
-	case jose.RS512, jose.ES512, jose.PS512:
-		return sha512.New(), nil
-	default:
-		return nil, fmt.Errorf("oidc: unsupported signing algorithm %q", sigAlgorithm)
-	}
-}
-
-func HashString(hash hash.Hash, s string, firstHalf bool) string {
-	if hash == nil {
-		return s
-	}
-	//nolint:errcheck
-	hash.Write([]byte(s))
-	size := hash.Size()
-	if firstHalf {
-		size = size / 2
-	}
-	sum := hash.Sum(nil)[:size]
-	return base64.RawURLEncoding.EncodeToString(sum)
-}