1 files changed, 18 insertions, 18 deletions
diff --git a/modules/util/util.go b/modules/util/util.go
index c2117a6525..90d0eca15c 100644
--- a/modules/util/util.go
+++ b/modules/util/util.go
@@ -137,8 +137,8 @@ func MergeInto(dict map[string]interface{}, values ...interface{}) (map[string]i
 	return dict, nil
 }
 
-// RandomInt returns a random integer between 0 and limit, inclusive
-func RandomInt(limit int64) (int64, error) {
+// CryptoRandomInt returns a crypto random integer between 0 and limit, inclusive
+func CryptoRandomInt(limit int64) (int64, error) {
 	rInt, err := rand.Int(rand.Reader, big.NewInt(limit))
 	if err != nil {
 		return 0, err
@@ -146,27 +146,27 @@ func RandomInt(limit int64) (int64, error) {
 	return rInt.Int64(), nil
 }
 
-const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+const alphanumericalChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 
-// RandomString generates a random alphanumerical string
-func RandomString(length int64) (string, error) {
-	bytes := make([]byte, length)
-	limit := int64(len(letters))
-	for i := range bytes {
-		num, err := RandomInt(limit)
+// CryptoRandomString generates a crypto random alphanumerical string, each byte is generated by [0,61] range
+func CryptoRandomString(length int64) (string, error) {
+	buf := make([]byte, length)
+	limit := int64(len(alphanumericalChars))
+	for i := range buf {
+		num, err := CryptoRandomInt(limit)
 		if err != nil {
 			return "", err
 		}
-		bytes[i] = letters[num]
+		buf[i] = alphanumericalChars[num]
 	}
-	return string(bytes), nil
+	return string(buf), nil
 }
 
-// RandomBytes generates `length` bytes
-// This differs from RandomString, as RandomString is limits each byte to have
-// a maximum value of 63 instead of 255(max byte size)
-func RandomBytes(length int64) ([]byte, error) {
-	bytes := make([]byte, length)
-	_, err := rand.Read(bytes)
-	return bytes, err
+// CryptoRandomBytes generates `length` crypto bytes
+// This differs from CryptoRandomString, as each byte in CryptoRandomString is generated by [0,61] range
+// This function generates totally random bytes, each byte is generated by [0,255] range
+func CryptoRandomBytes(length int64) ([]byte, error) {
+	buf := make([]byte, length)
+	_, err := rand.Read(buf)
+	return buf, err
 }