AiToken の暗号化と発行

                      
                      ステップ 1: メンバーのメールアドレス ─── RSA 暗号化（公開鍵）───► emailEncrypted バイト
ステップ 2: emailEncrypted ─── Base64 エンコード ───► emailRSAStr
ステップ 3: {projectId}:{emailRSAStr} 文字列連結
ステップ 4: 連結後の文字列 ─── Base64 エンコード ───► 最終的な AiToken

                    

                      
                      import java.nio.charset.StandardCharsets;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;
import javax.crypto.Cipher;

public class Main {

    private static final String RSA_ALGORITHM = "RSA";
    private static final String RSA_TRANSFORMATION = "RSA/ECB/PKCS1Padding";

    /**
     * Encrypts data using RSA public key.
     *
     * @param data         The data to encrypt.
     * @param publicKeyStr The Base64 encoded RSA public key.
     * @return Encrypted data bytes.
     */
    public static byte[] encrypt(byte[] data, String publicKeyStr) throws Exception {
        byte[] publicKeyBytes = Base64.getDecoder().decode(publicKeyStr);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKeyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
        PublicKey publicKey = keyFactory.generatePublic(keySpec);

        Cipher cipher = Cipher.getInstance(RSA_TRANSFORMATION);
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        return cipher.doFinal(data);
    }

    /**
     * Generates a login key by encrypting the email and combining with projectId.
     *
     * @param projectId The project ID.
     * @param email     The user's email.
     * @param publicKey The Base64 encoded RSA public key.
     * @return The final login key string.
     * @throws Exception if encryption fails.
     */
    public static String generateLoginKey(String projectId, String email, String publicKey) throws Exception {
        byte[] emailEncrypted = encrypt(email.getBytes(StandardCharsets.UTF_8), publicKey);
        String emailRSAStr = Base64.getEncoder().encodeToString(emailEncrypted);
        String keyStr = projectId + ":" + emailRSAStr;
        return Base64.getEncoder().encodeToString(keyStr.getBytes(StandardCharsets.UTF_8));
    }

    public static void main(String[] args) {
        String projectId = "your project ID";
        String email = "your email";
        String publicKey = "your public key";

        try {
            String key = generateLoginKey(projectId, email, publicKey);
            System.out.println(key);
        } catch (Exception e) {
            System.err.println("Failed to generate login key: " + e.getMessage());
        }
    }
}

                    

                      
                      import * as forge from 'node-forge';

/**
 * Encrypt data using RSA public key
 * @param data Data to be encrypted
 * @param publicKeyStr Base64 encoded public key string
 * @returns Encrypted byte array
 */
export function encrypt(data: string, publicKeyStr: string): Uint8Array {
  try {
    // Decode Base64 public key
    const publicKeyBytes = forge.util.decode64(publicKeyStr);

    // Create public key object
    const publicKey = forge.pki.publicKeyFromAsn1(forge.asn1.fromDer(publicKeyBytes));

    // Use RSA encryption with PKCS1 padding (consistent with Java's default behavior)
    const encrypted = publicKey.encrypt(data, 'RSAES-PKCS1-V1_5');

    // Convert forge's byte string to Uint8Array
    const bytes = new Uint8Array(encrypted.length);
    for (let i = 0; i < encrypted.length; i++) {
      bytes[i] = encrypted.charCodeAt(i) & 0xff;
    }
    return bytes;
  } catch (error) {
    throw new Error(`RSA encryption failed: ${error}`);
  }
}

/**
 * Convert byte array to Base64 string
 * @param bytes Byte array
 * @returns Base64 encoded string
 */
export function bytesToBase64(bytes: Uint8Array): string {
  // Convert Uint8Array to string, then use forge's encode64
  const binaryString = Array.from(bytes, byte => String.fromCharCode(byte)).join('');
  return forge.util.encode64(binaryString);
}

/**
 * Convert string to Base64
 * @param str String to be encoded
 * @returns Base64 encoded string
 */
export function stringToBase64(str: string): string {
  return forge.util.encode64(str);
}

/**
 * Main function - Generate encrypted key string
 * @param projectId Project ID
 * @param email Email address
 * @param publicKey Base64 encoded RSA public key
 * @returns Final encrypted Base64 string
 */
export function generateEncryptedKey(projectId: string, email: string, publicKey: string): string {
  // Use RSA to encrypt email
  const emailRSAEncrypt = encrypt(email, publicKey);

  // Convert encryption result to Base64
  const emailRSAStr = bytesToBase64(emailRSAEncrypt);

  // Combine projectId and encrypted email
  const keyStr = `${projectId}:${emailRSAStr}`;

  // Encode the entire string with Base64
  const result = stringToBase64(keyStr);

  return result;
}

// Generate AiToken example
// generateEncryptedKey(projectId, email, publicKey)

                    

                      
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