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import Foundation import Security // 生成RSA密钥对 func generateRSAKeyPair() throws -> SecKey { let parameters: [String: Any] = [ kSecAttrKeyType as String: kSecAttrKeyTypeRSA, kSecAttrKeySizeInBits as String: 2048 ] var error: Unmanaged<CFError>? guard let privateKey = SecKeyCreateRandomKey(parameters as CFDictionary, &error) else { throw error!.takeRetainedValue() as Error } return privateKey } // 使用公钥RSA加密文件 func encryptFile(withPublicKey publicKey: SecKey, inputFile: URL, outputFile: URL) throws { let inputData = try Data(contentsOf: inputFile) let encryptedData = SecKeyCreateEncryptedData(publicKey, .rsaEncryptionOAEPSHA512, inputData as CFData, nil)! try encryptedData.write(to: outputFile) } // 使用私钥RSA解密文件 func decryptFile(withPrivateKey privateKey: SecKey, inputFile: URL, outputFile: URL) throws { let encryptedData = try Data(contentsOf: inputFile) let decryptedData = SecKeyCreateDecryptedData(privateKey, .rsaEncryptionOAEPSHA512, encryptedData as CFData, nil)! try decryptedData.write(to: outputFile) } // 生成RSA密钥对 let privateKey = try generateRSAKeyPair() let publicKey = SecKeyCopyPublicKey(privateKey)! // 指定输入和输出文件路径 let inputURL = URL(fileURLWithPath: "elements.data") let encryptedOutputURL = URL(fileURLWithPath: "encrypted_elements.data") let decryptedOutputURL = URL(fileURLWithPath: "decrypted_elements.data") // 使用公钥RSA加密文件 do { try encryptFile(withPublicKey: publicKey, inputFile: inputURL, outputFile: encryptedOutputURL) print("文件已成功加密！") } catch { print("加密文件时发生错误：\(error.localizedDescription)") } // 使用私钥RSA解密文件 do { try decryptFile(withPrivateKey: privateKey, inputFile: encryptedOutputURL, outputFile: decryptedOutputURL) print("文件已成功解密！") } catch { print("解密文件时发生错误：\(error.localizedDescription)") }