add uuid validation

osutils/data.go

@@ -0,0 +1,69 @@
+package osutils
+
+import (
+	"github.com/pkg/errors"
+	"unicode"
+)
+
+func UuidValidate(uuid string) error {
+	if len(uuid) != 36 {
+		return errors.New("uuid length not valid")
+	}
+
+	// validate first 8 octets
+	for i := 0; i < 8; i++ {
+		if !(unicode.IsLetter(rune(uuid[i])) || unicode.IsDigit(rune(uuid[i]))) && uuid[i] == '-' {
+			return errors.New("uuid first 8 octets not valid")
+		}
+	}
+
+	// validate separator
+	if uuid[8] != '-' {
+		return errors.New("uuid separator not valid")
+	}
+
+	// validate second 4 octets
+	for i := 9; i < 13; i++ {
+		if !(unicode.IsLetter(rune(uuid[i])) || unicode.IsDigit(rune(uuid[i]))) && uuid[i] == '-' {
+			return errors.New("uuid second 4 octets not valid")
+		}
+	}
+
+	// validate separator
+	if uuid[13] != '-' {
+		return errors.New("uuid separator not valid")
+	}
+
+	// validate third 4 octets
+	for i := 14; i < 18; i++ {
+		if !(unicode.IsLetter(rune(uuid[i])) || unicode.IsDigit(rune(uuid[i]))) && uuid[i] == '-' {
+			return errors.New("uuid third 4 octets not valid")
+		}
+	}
+
+	// validate separator
+	if uuid[18] != '-' {
+		return errors.New("uuid separator not valid")
+	}
+
+	// validate fourth 4 octets
+	for i := 19; i < 23; i++ {
+		if !(unicode.IsLetter(rune(uuid[i])) || unicode.IsDigit(rune(uuid[i]))) && uuid[i] == '-' {
+			return errors.New("uuid fourth 4 octets not valid")
+		}
+	}
+
+	// validate separator
+	if uuid[23] != '-' {
+		return errors.New("uuid separator not valid")
+	}
+
+	// validate fourth 4 octets
+	for i := 24; i < 36; i++ {
+		if !(unicode.IsLetter(rune(uuid[i])) || unicode.IsDigit(rune(uuid[i]))) && uuid[i] == '-' {
+			return errors.New("uuid fifth 12 octets not valid")
+		}
+	}
+
+	return nil
+}