From e9288ee253965100e54326babf4019ec4fff1097 Mon Sep 17 00:00:00 2001
From: hupeh <hupeh@qq.com>
Date: Tue, 19 Sep 2023 23:59:14 +0800
Subject: [PATCH] =?UTF-8?q?=E7=94=9F=E6=88=90=20RS256=20=E5=85=AC=E9=92=A5?=
 =?UTF-8?q?=E7=A7=81=E9=92=A5?=
MIME-Version: 1.0
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---
 scripts/rs256/rs256.go | 76 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 scripts/rs256/rs256.go

diff --git a/scripts/rs256/rs256.go b/scripts/rs256/rs256.go
new file mode 100644
index 0000000..f8cc9cc
--- /dev/null
+++ b/scripts/rs256/rs256.go
@@ -0,0 +1,76 @@
+package main
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/asn1"
+	"encoding/gob"
+	"encoding/pem"
+	"fmt"
+	"os"
+)
+
+func main() {
+	reader := rand.Reader
+	bitSize := 2048
+
+	key, err := rsa.GenerateKey(reader, bitSize)
+	checkError(err)
+
+	publicKey := key.PublicKey
+
+	saveGobKey("private.key", key)
+	savePEMKey("private.pem", key)
+
+	saveGobKey("public.key", publicKey)
+	savePublicPEMKey("public.pem", publicKey)
+}
+
+func saveGobKey(fileName string, key interface{}) {
+	outFile, err := os.Create(fileName)
+	checkError(err)
+	defer outFile.Close()
+
+	encoder := gob.NewEncoder(outFile)
+	err = encoder.Encode(key)
+	checkError(err)
+}
+
+func savePEMKey(fileName string, key *rsa.PrivateKey) {
+	outFile, err := os.Create(fileName)
+	checkError(err)
+	defer outFile.Close()
+
+	var privateKey = &pem.Block{
+		Type:  "PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(key),
+	}
+
+	err = pem.Encode(outFile, privateKey)
+	checkError(err)
+}
+
+func savePublicPEMKey(fileName string, pubkey rsa.PublicKey) {
+	asn1Bytes, err := asn1.Marshal(pubkey)
+	checkError(err)
+
+	var pemkey = &pem.Block{
+		Type:  "PUBLIC KEY",
+		Bytes: asn1Bytes,
+	}
+
+	pemfile, err := os.Create(fileName)
+	checkError(err)
+	defer pemfile.Close()
+
+	err = pem.Encode(pemfile, pemkey)
+	checkError(err)
+}
+
+func checkError(err error) {
+	if err != nil {
+		fmt.Println("Fatal error ", err.Error())
+		os.Exit(1)
+	}
+}