来自Swift中服务器的公钥字符串的Seckey [英] Seckey from public key string from server in Swift

问题描述

我想使用RSA加密数据，我试图在我的代码中生成密钥并且它正在工作，但我真正需要的是将公钥作为字符串从服务器获取，然后将其用作Seckey，以便我可以使用它使用RSA加密数据，
我尝试了这段代码：

I want to encrypt data using RSA , I tried to generate the key in my code and it's working , But what I actually need is to get the public key as a string from server and then use it as Seckey so I can use it to encrypt data using RSA, I tried this code:

//KeyString is the string of the key from server
let KeyData = (keyString as NSString).dataUsingEncoding(NSUTF8StringEncoding) as NSData!


    var cert : Unmanaged<SecCertificateRef>!;
    var  policy : Unmanaged<SecPolicy>!;
    cert = SecCertificateCreateWithData(kCFAllocatorDefault, KeyData);
    policy = SecPolicyCreateBasicX509();
    var status : OSStatus = noErr
    var trust: SecTrust?
    var certArray : [Unmanaged<SecCertificateRef>!] = [cert];
    var certArrayPointer = UnsafeMutablePointer<UnsafePointer<Void>>(certArray)
    status = SecTrustCreateWithCertificates(cert, policy, trust);
    let publicKey: SecKeyRef = SecTrustCopyPublicKey(trust!).takeUnretainedValue()

我无法'运行此代码，因为SecTrustCreateWithCertificates方法期望证书为anyObject！ ，我不知道如何解决这个问题，如果解决这个问题会让我获得SecKey。

I couldn't run this code because SecTrustCreateWithCertificates Method is expecting certificate as anyObject! , I don't Know how to fix this,And if solving this will let me get the SecKey.

我从在objective-c中的这个答案

所以如果任何人都可以帮我找到合适的代码来解决这个问题，我将非常感谢：）

So if any one can help me getting the right code to solve this , I will be very thankful :)

推荐答案

对于mac：

For mac:

let pubKey = "-----BEGIN PUBLIC KEY-----MIICIjANBgAgK.......InbFk1FkucQqruMyUCAwEAAQ==-----END PUBLIC KEY-----"
let pubKeyData = pubKey.dataUsingEncoding(NSASCIIStringEncoding)
var error: Unmanaged<CFErrorRef>?
let secKey = SecKeyCreateFromData(NSDictionary(), pubKeyData!, &error)

pubKey是公钥的字符串表示形式。
如果您不知道公钥，可以使用以下命令从私钥推断：

Where pubKey is a string representation of your public key. If you don't know your public key, you can infer it from your private key with the following command:

openssl rsa -in server.key -pubout  > mykey.pub

其中server.key是包含的文件---- -BEGIN RSA私钥-----
作为第一行。

Where server.key is the file containing -----BEGIN RSA PRIVATE KEY----- as the first line.

这有点复杂。
你需要一个 der 文件。它是您的证书的二进制表示。
如果您需要转换现有证书，可以使用以下命令进行转换：

It's a bit more complicate. You need a der file. It's a binary representation of your certificate. If you need to convert an existing certificate, you can do so with the following command:

 openssl x509 -outform der -in file.crt|pem -out mycert.der

。 crt 或 .pem 文件包含 ----- BEGIN CERTIFICATE ----- 作为第一行。

The .crt or .pem file contains -----BEGIN CERTIFICATE----- as the first line.

将 der 文件放入捆绑包中并执行：

Put the der file in your bundle and do:

let certificateData = NSData(contentsOfURL:NSBundle.mainBundle().URLForResource("mycert", withExtension: "der")!)

let certificate = SecCertificateCreateWithData(nil, certificateData!)

var trust: SecTrustRef?

let policy = SecPolicyCreateBasicX509()
let status = SecTrustCreateWithCertificates(certificate!, policy, &trust)

if status == errSecSuccess {
    let key = SecTrustCopyPublicKey(trust!)!;
}

Yatta！密钥现在包含公钥的 SecKey 表示。快乐固定。

Yatta ! Key now contains a SecKey representation of your public key. Happy Pinning.

这篇关于来自Swift中服务器的公钥字符串的Seckey的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！