Initial QSfera import

Server/vendor/github.com/crewjam/saml/util.go

@@ -0,0 +1,32 @@
+package saml
+
+import (
+	"crypto/rand"
+	"io"
+	"time"
+
+	dsig "github.com/russellhaering/goxmldsig"
+)
+
+// TimeNow is a function that returns the current time. The default
+// value is time.Now, but it can be replaced for testing.
+var TimeNow = func() time.Time { return time.Now().UTC() }
+
+// Clock is assigned to dsig validation and signing contexts if it is
+// not nil, otherwise the default clock is used.
+var Clock *dsig.Clock
+
+// RandReader is the io.Reader that produces cryptographically random
+// bytes when they are need by the library. The default value is
+// rand.Reader, but it can be replaced for testing.
+var RandReader = rand.Reader
+
+//nolint:unparam // This always receives 20, but we want the option to do more or less if needed.
+func randomBytes(n int) []byte {
+	rv := make([]byte, n)
+
+	if _, err := io.ReadFull(RandReader, rv); err != nil {
+		panic(err)
+	}
+	return rv
+}