char mins done; need to shuffle some error condition checks before

pwgenerator/funcs_cryptoshuffer.go

@@ -0,0 +1,27 @@
+package pwgenerator
+
+import (
+	"crypto/rand"
+	"encoding/binary"
+)
+
+// Int63 is used to interface as a *(math/rand).Rand but backed with a cryptographically sound generation.
+func (c *cryptoShuffler) Int63() (i int64) {
+
+	var b [8]byte
+
+	_, _ = rand.Read(b[:])
+
+	// Mask is used to ensure a positive number.
+	i = int64(binary.LittleEndian.Uint64(b[:]) & (1<<63 - 1))
+
+	return
+}
+
+// Seed is used to interface as a *(math/rand).Rand.
+func (c *cryptoShuffler) Seed(_ int64) {
+
+	// It's 100% OK that this is a no-op because we seed from the crypto methodology itself within cryptoShuffler.Int63 on each call.
+
+	return
+}