From 6bcd031b5b8e755cb10b1b493191473f47e5e550 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Sat, 5 Jul 2025 15:24:20 +0800
Subject: [PATCH] feat: add go tpm rand

---
 go-tpm-rand/go.mod  |  7 +++++++
 go-tpm-rand/go.sum  |  4 ++++
 go-tpm-rand/main.go | 24 ++++++++++++++++++++++++
 3 files changed, 35 insertions(+)
 create mode 100644 go-tpm-rand/go.mod
 create mode 100644 go-tpm-rand/go.sum
 create mode 100644 go-tpm-rand/main.go

diff --git a/go-tpm-rand/go.mod b/go-tpm-rand/go.mod
new file mode 100644
index 0000000..4a59043
--- /dev/null
+++ b/go-tpm-rand/go.mod
@@ -0,0 +1,7 @@
+module git.hatter.ink/go-tpm-rand
+
+go 1.24.3
+
+require github.com/google/go-tpm v0.9.5
+
+require golang.org/x/sys v0.8.0 // indirect
diff --git a/go-tpm-rand/go.sum b/go-tpm-rand/go.sum
new file mode 100644
index 0000000..8ba003d
--- /dev/null
+++ b/go-tpm-rand/go.sum
@@ -0,0 +1,4 @@
+github.com/google/go-tpm v0.9.5 h1:ocUmnDebX54dnW+MQWGQRbdaAcJELsa6PqZhJ48KwVU=
+github.com/google/go-tpm v0.9.5/go.mod h1:h9jEsEECg7gtLis0upRBQU+GhYVH6jMjrFxI8u6bVUY=
+golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/go-tpm-rand/main.go b/go-tpm-rand/main.go
new file mode 100644
index 0000000..24f5b6c
--- /dev/null
+++ b/go-tpm-rand/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/google/go-tpm/legacy/tpm2"
+)
+
+// reference: https://ericchiang.github.io/post/tpm-keys/
+func main() {
+	f, err := os.OpenFile("/dev/tpmrm0", os.O_RDWR, 0)
+	if err != nil {
+		log.Fatalf("opening tpm: %v", err)
+	}
+	defer f.Close()
+
+	out, err := tpm2.GetRandom(f, 16)
+	if err != nil {
+		log.Fatalf("getting random bytes: %v", err)
+	}
+	fmt.Printf("%x\n", out)
+}