android - 以编程方式从 Android 的 Url 获取证书信息

Question

是否可以从Url获取证书信息？在 iOS 中，它有 NSURLAuthenticationChallenge，如果 url 包含 https，它会给出信息。

同理我们有没有办法通过Code获取特定url的证书信息呢？

Answer 1

X509TrustManager trustManager = new X509TrustManager() {
                @Override
                public void checkClientTrusted(X509Certificate[] chain,
                        String authType) throws CertificateException {
                    for (TrustManager tm : managers) {
                        if (tm instanceof X509TrustManager) {
                            ((X509TrustManager) tm).checkClientTrusted(
                                    chain, authType);
                        }
                    }
                }

                @Override
                public void checkServerTrusted(X509Certificate[] chain,
                        String authType) throws CertificateException {
                    for (X509Certificate cert : chain) {
                        // cert gives the server Certificate Information.
                        if (cert.getIssuerX500Principal().equals(
                                trustedRoot.getIssuerX500Principal())) {
                            return;
                        }
                    }
                    for (TrustManager tm : managers) {
                        if (tm instanceof X509TrustManager) {
                            ((X509TrustManager) tm).checkServerTrusted(
                                    chain, authType);
                        }
                    }
                }

                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    ArrayList<X509Certificate> issuers = new ArrayList<>();
                    for (TrustManager tm : managers) {
                        if (tm instanceof X509TrustManager) {
                            issuers.addAll(Arrays
                                    .asList(((X509TrustManager) tm)
                                            .getAcceptedIssuers()));
                        }
                    }
                    return issuers.toArray(new X509Certificate[issuers
                            .size()]);
                }

            };

检查此 //cert 提供服务器证书信息。 在上面的代码中。