ios - 伐木 worker iOS : How to write encrypted logs (Block Encryption)

Question

我正在使用 Lumberjack 作为日志记录平台(Objective C/Swift)有没有办法将日志加密写入文件？

• 如果是，那么任何例子都是有用的
• 另外，之后如何读取加密后的日志
• 密集型日志记录是否有不同类型的加密？我听说过 block 加密

Answer 1

如果你想推出自己的自定义记录器

import CocoaLumberjack
import Security

public class EncryptedLogger: DDAbstractLogger {
    let key: SecKey!
    let blockSize : Int
    let padding : SecPadding
    
    init(key: SecKey!, blockSize : Int = 128, padding: SecPadding = .PKCS1) {
        self.key = key
        self.blockSize = blockSize
        self.padding = padding
    }

    convenience init(keyFilePath: String, blockSize: Int = 128, padding: SecPadding = .PKCS1) {
        //TODO: load key from file
        self.init(key: nil, blockSize: blockSize, padding: padding)
    }
    
    /**
     *  The log message method
     *
     *  @param logMessage the message (model)
     */
    public override func logMessage(logMessage: DDLogMessage!) {
        let plainText = logFormatter != nil ? logFormatter.formatLogMessage(logMessage) : logMessage.message;
        
        let plainTextData = [UInt8](plainText.utf8)
        
        var encryptedData = [UInt8](count: Int(blockSize), repeatedValue: 0)
        var encryptedDataLength = blockSize
        
        let result = SecKeyEncrypt(key, padding, plainTextData, plainTextData.count, &encryptedData, &encryptedDataLength)
        
        //TODO: write the encryptedData to a file or post it to some endpoint
        //...
    }

    @objc
    public override var loggerName: String! {
        get {
            return "\(self.dynamicType)"
        }
    }
}