Added random package

.gitignore

@@ -0,0 +1,23 @@
+## Go
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# misc
+.DS_Store
+
+# other
+*.swp

go.mod

@@ -0,0 +1,3 @@
+module github.com/tylertravisty/go-utils
+
+go 1.16

random/random.go

@@ -0,0 +1,36 @@
+package random
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"fmt"
+)
+
+// Bytes creates an array of random bytes with specified size.
+// If used to generate password salt, then size of 16 bytes (128 bits) is recommended.
+func Bytes(size int) ([]byte, error) {
+	if size < 0 {
+		return nil, fmt.Errorf("random: size cannot be less than zero")
+	}
+	random := make([]byte, size)
+
+	_, err := rand.Read(random)
+	if err != nil {
+		return nil, fmt.Errorf("random: error while reading random bytes: %v", err)
+	}
+
+	return random, nil
+}
+
+// String creates a Base64-encoded string of random bytes with specified length.
+// If used to generate a session token, then length of 48 (36 bytes) is recommended.
+func String(length int) (string, error) {
+	b, err := Bytes(length)
+	if err != nil {
+		return "", fmt.Errorf("random: error while generating random bytes: %v", err)
+	}
+
+	str := base64.URLEncoding.EncodeToString(b)
+
+	return str[:length], nil
+}