我四处寻找解决方案，并在 Node.js 服务器和 Objective-C 客户端上加密，反之亦然，使用 AES(或其他合适的方式)

我对密码学比较陌生，我不知道为什么我的加密文本在每种语言中都不同。

这是我目前所拥有的:

Node.js 加密方法 Using this CryptoJS Library - node-cryptojs-aes

var node_cryptojs = require("node-cryptojs-aes");
var CryptoJS = node_cryptojs.CryptoJS;

    var textToEncrypt = 'Hello';
var key_clear = 'a16byteslongkey!';

//encrypted + decrypted

var encrypted = CryptoJS.AES.encrypt(clearText, key_clear, { iv: null });
var decrypted = CryptoJS.AES.decrypt(encrypted, key_clear, { iv: null });

//Outputs   
    console.log("encrypted: " + encrypted);     //encrypted: U2FsdGVkX1/ILXOjqIw2Vvz6DzRh1LMHgEQhDm3OunY=
console.log("decrypted: " + decrypted.toString(CryptoJS.enc.Utf8));   // decrypted: Hello

Objective-C 加密方法 Using AESCrypt library

NSString* textToEncrypt = @"Hello";

// encrypt
NSString* encryptedText = [AESCrypt encrypt:textToEncrypt password:@"a16byteslongkey!"];

// decrypt
NSString* decryptedText = [AESCrypt decrypt:encryptedText password:@"a16byteslongkey!"];

// output
NSLog(@"Text to encrypt: %@", textToEncrypt);    // Text to encrypt: Hello
NSLog(@"Encrypted text: %@", encryptedText);     // Encrypted text: wY80MJyxRRJdE+eKw6kaIA==
NSLog(@"Decrypted text: %@", decryptedText);     // Decrypted text: Hello

我摸索了很久，尝试了所有我能想到的方法。如果需要，可以显示库中的底层加密方法。 AESCrypt 库中的 key 应用了 SHAR256 哈希，但我已将其删除，并认为字符串编码存在一些不匹配。

最佳答案

我将其发布在这里是因为肯定会有其他人尝试互操作 Node.js 和 iOS。每个人似乎都沉迷于将所有内容保持在正确的结构、缓冲区、字符串等中。我知道我做到了。因此，这是创建 key 、创建 iv、加密、解密和放置在 base64 中以便于传输的分步过程:

JavaScript(使用 CryptoJS 模块的 Node.js)

    // Generate key from password and salt using SHA256 to hash and PDKDF2 to harden
    var password = "1234567890123456";
    var salt = "gettingsaltyfoo!";
    var hash = CryptoJS.SHA256(salt);
    var key = CryptoJS.PBKDF2(password, hash, { keySize: 256/32, iterations: 1000 });
    console.log("Hash :",hash.toString(CryptoJS.enc.Base64));
    console.log("Key :",key.toString(CryptoJS.enc.Base64));

    // Generate a random IV
    var iv = CryptoJS.lib.WordArray.random(128/8);
    console.log("IV :",iv.toString(CryptoJS.enc.Base64));

    // Encrypt message into base64
    var message = "Hello World!";
    var encrypted = CryptoJS.AES.encrypt(message, key, { iv: iv });
    var encrypted64 = encrypted.ciphertext.toString(CryptoJS.enc.Base64);
    console.log("Encrypted :",encrypted64);

    // Decrypt base64 into message again
    var cipherParams = CryptoJS.lib.CipherParams.create({ ciphertext: CryptoJS.enc.Base64.parse(encrypted64) });
    var decrypted = CryptoJS.AES.decrypt(cipherParams, key, { iv: iv }).toString(CryptoJS.enc.Utf8);
    console.log("Decrypted :",decrypted);

使用 CommonCrypto 的 iOS SDK

    // Generate key from password and salt using SHA256 to hash and PDKDF2 to harden
    NSString* password = @"1234567890123456";
    NSString* salt = @"gettingsaltyfoo!";
    NSMutableData* hash = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH];
    NSMutableData* key = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH];
    CC_SHA256(salt.UTF8String, (CC_LONG)strlen(salt.UTF8String), hash.mutableBytes);
    CCKeyDerivationPBKDF(kCCPBKDF2, password.UTF8String, strlen(password.UTF8String), hash.bytes, hash.length, kCCPRFHmacAlgSHA1, 1000, key.mutableBytes, key.length);
    NSLog(@"Hash : %@",[hash base64EncodedStringWithOptions:0]);
    NSLog(@"Key : %@",[key base64EncodedStringWithOptions:0]);

    // Generate a random IV (or use the base64 version from node.js)
    NSString* iv64 = @"ludWXFqwWeLOkmhutxiwHw==";       // Taken from node.js CryptoJS IV output
    NSData* iv = [[NSData alloc] initWithBase64EncodedString:iv64 options:0];
    NSLog(@"IV : %@",[iv base64EncodedStringWithOptions:0]);

    // Encrypt message into base64
    NSData* message = [@"Hello World!" dataUsingEncoding:NSUTF8StringEncoding];
    NSMutableData* encrypted = [NSMutableData dataWithLength:message.length + kCCBlockSizeAES128];
    size_t bytesEncrypted = 0;
    CCCrypt(kCCEncrypt,
            kCCAlgorithmAES128,
            kCCOptionPKCS7Padding,
            key.bytes,
            key.length,
            iv.bytes,
            message.bytes, message.length,
            encrypted.mutableBytes, encrypted.length, &bytesEncrypted);
    NSString* encrypted64 = [[NSMutableData dataWithBytes:encrypted.mutableBytes length:bytesEncrypted] base64EncodedStringWithOptions:0];
    NSLog(@"Encrypted : %@",encrypted64);

    // Decrypt base 64 into message again
    NSData* encryptedWithout64 = [[NSData alloc] initWithBase64EncodedString:encrypted64 options:0];
    NSMutableData* decrypted = [NSMutableData dataWithLength:encryptedWithout64.length + kCCBlockSizeAES128];
    size_t bytesDecrypted = 0;
    CCCrypt(kCCDecrypt,
            kCCAlgorithmAES128,
            kCCOptionPKCS7Padding,
            key.bytes,
            key.length,
            iv.bytes,
            encryptedWithout64.bytes, encryptedWithout64.length,
            decrypted.mutableBytes, decrypted.length, &bytesDecrypted);
    NSData* outputMessage = [NSMutableData dataWithBytes:decrypted.mutableBytes length:bytesDecrypted];
    NSString* outputString = [[NSString alloc] initWithData:outputMessage encoding:NSUTF8StringEncoding];
    NSLog(@"Decrypted : %@",outputString);

输出应该是一样的

    /*
        Hash : AEIHWLT/cTUfXdYJ+oai6sZ4tXlc4QQcYTbI9If/Moc=
        Key : WdHhJ19dSBURBA25HZSpbCJ4KnNEEgwzqjgyTBqa3eg=
        IV : ludWXFqwWeLOkmhutxiwHw==
        Encrypted : D3JpubesPMgQTiXbaoxAIw==
        Decrypted : Hello World!
    */

希望这可以节省其他人我浪费的时间:)

关于javascript - 加密 iOS 和解密 Node.js AES，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18596699/