[#275] added support to customize the default user email templates from the Admin UI

tools/security/random.go

@@ -4,15 +4,23 @@ import (
 	"crypto/rand"
 )
 
-// RandomString generates a random string of specified length.
+// RandomString generates a random string with the specified length.
 //
 // The generated string is cryptographically random and matches
 // [A-Za-z0-9]+ (aka. it's transparent to URL-encoding).
 func RandomString(length int) string {
 	const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
 
+	return RandomStringWithAlphabet(length, alphabet)
+}
+
+// RandomStringWithAlphabet generates a cryptographically random string
+// with the specified length and characters set.
+func RandomStringWithAlphabet(length int, alphabet string) string {
 	bytes := make([]byte, length)
+
 	rand.Read(bytes)
+
 	for i, b := range bytes {
 		bytes[i] = alphabet[b%byte(len(alphabet))]
 	}