1 files changed, 31 insertions, 0 deletions
diff --git a/validator.go b/validator.go
new file mode 100644
index 0000000..d6a4bb5
--- /dev/null
+++ b/validator.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"regexp"
+)
+
+var specialsRxp *regexp.Regexp = regexp.MustCompile("[,.\\[\\]!@#$%^&*?_\\(\\)-]")
+var numbersRxp *regexp.Regexp = regexp.MustCompile("[0-9]")
+
+func validatePassword(password string) error {
+	if len(password) < 10 {
+		return fmt.Errorf("Your password needs to be at least 10 characters long. But was %d characters.", len(password))
+	}
+	// check uppercase and lowercase
+	if match, err := regexp.MatchString("[a-z]", password); err != nil || !match {
+		return fmt.Errorf("Your password needs at least one lowercase character")
+	}
+	if match, err := regexp.MatchString("[A-Z]", password); err != nil || !match {
+		return fmt.Errorf("Your password needs at least one uppercase character")
+	}
+	// check specials + numbers (at least 3)
+	specials := specialsRxp.FindAllString(password, -1)
+	numbers := numbersRxp.FindAllString(password, -1)
+	if len(specials)+len(numbers) < 3 {
+		return fmt.Errorf("Your password needs at least three special characters or numbers")
+	}
+
+	// call out to password hash check service...
+	return nil
+}