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我正在尝试从 p12 数据中提取到期日期。我从头到尾阅读了苹果文档，但无法找到如何去做 - https://developer.apple.com/library/prerelease/mac/documentation/Security/Conceptual/CertKeyTrustProgGuide/CertKeyTrustProgGuide.pdf

我在pdf中的代码，我正在使用带有私钥p12数据的NSData加载SecKeyRef，并且能够解密在服务器上加密的数据。

问题是我试图阻止在 p12 过期时进行解密，但我无法检测到密钥何时过期。

在java上，解决方案非常简单

     private PrivateKey decodeP12Key(String key) throws KeyStoreException, CertificateException, NoSuchAlgorithmException, IOException, UnrecoverableKeyException,InvalidKeyException {

 KeyStore kStore = KeyStore.getInstance(KeyType.P12.getKeyValue());
 String[] words = key.split(" ");
    return null;
 }

    X509Certificate cert = (X509Certificate)kStore.getCertificate(alias);
    if(isExpired(cert)){
       throw new InvalidKeyException("Invalid key used, please check if your key is valid and not expired");
    }
           PrivateKey pKey = (PrivateKey)kStore.getKey(alias,"".toCharArray());

           return pKey;
           cipher.init(Cipher.DECRYPT_MODE, key);
           return cipher;
        }

 private boolean isExpired(X509Certificate cert){
    Date expirationDate = cert.getNotAfter();
    Date beginDate = cert.getNotBefore();
    Date currentDate = new Date(System.currentTimeMillis());

    return currentDate.after(expirationDate) || currentDate.before(beginDate);
 }

任何人都知道如何在 ios 上做同样的事情？

编辑：还附上苹果论坛上的问题 https://forums.developer.apple.com/message/53696#53696 谢谢

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