Helper to create a file with encrypted content

encrypt.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+   "crypto/aes"
+   "crypto/cipher"
+   "crypto/rand"
+   "encoding/hex"
+   "fmt"
+   "io"
+   "os"
+)
+
+func main() {
+	var data string
+	fmt.Print("Enter the data to encrypt: ")
+	fmt.Scanln(&data)
+	plaintext := []byte(data)
+
+	var key string
+	fmt.Print("Enter a 32-byte encryption key: ")
+	fmt.Scanln(&key)
+
+	// Convert the key to a byte slice
+	keyBytes := []byte(key)
+	if len(keyBytes) != 32 {
+		fmt.Println("Key must be 32 bytes long for AES-256")
+		return
+	}
+
+	block, err := aes.NewCipher(keyBytes)
+	if err != nil {
+		fmt.Println("Error creating AES block cipher", err)
+		return
+	}
+
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		fmt.Println("Error setting GCM mode", err)
+		return
+	}
+
+	nonce := make([]byte, gcm.NonceSize())
+	if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
+		fmt.Println("Error generating the nonce ", err)
+		return
+	}
+
+	ciphertext := gcm.Seal(nonce, nonce, plaintext, nil)
+
+	enc := hex.EncodeToString(ciphertext)
+	fmt.Println("Encrypted data:", enc)
+	err = os.WriteFile("secret.enc", []byte(enc), 0600)
+	if err != nil {
+		fmt.Println("Error writing to file:", err)
+		return
+	}
+	fmt.Println("Encrypted data written to secret.enc")
+}