RSA

This example demonstrates how to use the crypt service to generate an RSA key pair, encrypt a message, and then decrypt it.

package main

import (
    "encoding/base64"
    "fmt"
    "log"

    "github.com/Snider/Enchantrix/pkg/crypt"
)

func demoRSA() {
    fmt.Println("--- RSA Demo ---")
    cryptService := crypt.NewService()

    // 1. Generate RSA key pair
    fmt.Println("Generating 2048-bit RSA key pair...")
    publicKey, privateKey, err := cryptService.GenerateRSAKeyPair(2048)
    if err != nil {
        log.Fatalf("Failed to generate RSA key pair: %v", err)
    }
    fmt.Println("Key pair generated successfully.")

    // 2. Encrypt a message
    message := []byte("This is a secret message for RSA.")
    fmt.Printf("\nOriginal message: %s\n", message)
    ciphertext, err := cryptService.EncryptRSA(publicKey, message, nil)
    if err != nil {
        log.Fatalf("Failed to encrypt with RSA: %v", err)
    }
    fmt.Printf("Encrypted ciphertext (base64): %s\n", base64.StdEncoding.EncodeToString(ciphertext))

    // 3. Decrypt the message
    decrypted, err := cryptService.DecryptRSA(privateKey, ciphertext, nil)
    if err != nil {
        log.Fatalf("Failed to decrypt with RSA: %v", err)
    }
    fmt.Printf("Decrypted message: %s\n", decrypted)

    // 4. Verify
    if string(message) == string(decrypted) {
        fmt.Println("\nSuccess! RSA decrypted message matches the original.")
    } else {
        fmt.Println("\nFailure! RSA decrypted message does not match the original.")
    }
    fmt.Println()
}