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我正在尝试按照这种方法实现 SSL 固定:

http://blog.crazybob.org/2010/02/android-trusting-ssl-certificates.html

该策略是将受信任的证书放在BKS密钥库中,并扩展HTTPClient使用的SSLSocketFactory ,以便只接受密钥库中包含的证书。

它在多个测试设备(Nexus、Samsung S1、Wildfire 等)上都可以正常工作,除了三星 Galaxy S2(带有 2.3.6 的欧洲版本)。偶尔(可能 3-4 次尝试)我收到以下错误消息之一:

  • 错误:0407006A:rsa 例程:RSA_padding_check_PKCS1_type_1:块类型不是 01 (SHA-1)
  • 错误:04067084:rsa 例程:RSA_EAY_PUBLIC_DECRYPT:数据对于模数太大(SHA-1)

只有当我在 BKS 中有多个具有相同 CNAME 条目的密钥时,才会出现此问题。当我在密钥库中只放一个密钥时,它每次都可以正常工作。但是,如果我想更改我的后端证书,以便有一个平稳的过渡期,我需要该应用程序能够接受同一主机的两个密钥。

任何想法可能是错误消息的原因以及如何规避它,将不胜感激。

谢谢!

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1 回答 1

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该策略是将受信任的证书放在 BKS 密钥库中,并扩展 HTTPClient 使用的 SSLSocketFactory,以便只接受密钥库中包含的证书。

对于固定,您只需要扩展X509TrustManager和覆盖checkServerTrusted.

OWASP 的证书和公钥固定中提供了一个示例(请参阅 Android 示例)。所有示例都从random.org获取随机字节并固定站点的证书以确保没有 PKI 有趣的业务:

public final class PubKeyManager implements X509TrustManager
{
  private static String PUB_KEY = "30820122300d06092a864886f70d0101" +
    "0105000382010f003082010a0282010100b35ea8adaf4cb6db86068a836f3c85" +
    "5a545b1f0cc8afb19e38213bac4d55c3f2f19df6dee82ead67f70a990131b6bc" +
    "ac1a9116acc883862f00593199df19ce027c8eaaae8e3121f7f329219464e657" +
    "2cbf66e8e229eac2992dd795c4f23df0fe72b6ceef457eba0b9029619e0395b8" +
    "609851849dd6214589a2ceba4f7a7dcceb7ab2a6b60c27c69317bd7ab2135f50" +
    "c6317e5dbfb9d1e55936e4109b7b911450c746fe0d5d07165b6b23ada7700b00" +
    "33238c858ad179a82459c4718019c111b4ef7be53e5972e06ca68a112406da38" +
    "cf60d2f4fda4d1cd52f1da9fd6104d91a34455cd7b328b02525320a35253147b" +
    "e0b7a5bc860966dc84f10d723ce7eed5430203010001";

  public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException
  {
    if (chain == null) {
      throw new IllegalArgumentException("checkServerTrusted: X509Certificate array is null");
    }

    if (!(chain.length > 0)) {
      throw new IllegalArgumentException("checkServerTrusted: X509Certificate is empty");
    }

    if (!(null != authType && authType.equalsIgnoreCase("RSA"))) {
      throw new CertificateException("checkServerTrusted: AuthType is not RSA");
    }

    // Perform customary SSL/TLS checks
    try {
      TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509");
      tmf.init((KeyStore) null);

      for (TrustManager trustManager : tmf.getTrustManagers()) {
        ((X509TrustManager) trustManager).checkServerTrusted(chain, authType);
      }
    } catch (Exception e) {
      throw new CertificateException(e);
    }

    // Hack ahead: BigInteger and toString(). We know a DER encoded Public Key begins
    // with 0x30 (ASN.1 SEQUENCE and CONSTRUCTED), so there is no leading 0x00 to drop.
    RSAPublicKey pubkey = (RSAPublicKey) chain[0].getPublicKey();
    String encoded = new BigInteger(1 /* positive */, pubkey.getEncoded()).toString(16);

    // Pin it!
    final boolean expected = PUB_KEY.equalsIgnoreCase(encoded);
    if (!expected) {
      throw new CertificateException("checkServerTrusted: Expected public key: "
                + PUB_KEY + ", got public key:" + encoded);
      }
    }
  }
}
于 2013-12-02T06:37:46.993 回答