swift - 使用公钥 (.cer) 加密 Json Payload

Question

您好，我想使用作为 .cer 文件的公钥来加密 Json Payload。请建议如何做到这一点？

  let path = Bundle.main.path(forResource: "Keys123_1", ofType: "cer")
 //get the data asociated to this file
        let urlStt =  URL(fileURLWithPath: path!)
        if let base64String = try? Data(contentsOf: urlStt).base64EncodedString() {
            print(base64String)

        let data2 = Data.init(base64Encoded: base64String)

        let keyDict:[NSObject:NSObject] = [
            kSecAttrKeyType: kSecAttrKeyTypeRSA,
            kSecAttrKeyClass: kSecAttrKeyClassPublic,
            kSecAttrKeySizeInBits: NSNumber(value: 2048),
            kSecReturnPersistentRef: true as NSObject
        ]
            var error:Unmanaged<CFError>? = nil


            guard let key = SecKeyCreateWithData(data2 as! CFData, keyDict as CFDictionary, &error) else {
                print(error)
                return
            }

我收到这个错误:

Optional(Swift.Unmanaged<__ObjC.CFError>(_value: Error Domain=NSOSStatusErrorDomain Code=-50 "RSA public key creation from data failed" UserInfo={NSDescription=RSA public key creation from data failed}))

Answer 1

尝试此代码并使用公钥加密并通过在服务器端使用私钥解密来验证数据。我跟着这个link .

这可能适合你。

func getPublicKey() -> SecKey? {

        let certificateData = try! Data(contentsOf: Bundle.main.url(forResource: "public", withExtension: "cer")!)

        let certificate = SecCertificateCreateWithData(nil, certificateData as CFData)
        var trust: SecTrust?

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

        if status == errSecSuccess {
            let publicKey = SecTrustCopyPublicKey(trust!)!
            return publicKey
        }
        return nil
}