1
現在、Springブートアプリケーションで相互認証を実装しており、Azureにそれを展開する必要があります。 Azureのロードバランサは、リクエストヘッダフィールド "X-ARR-ClientCert"内のクライアント証明書(Base64エンコード)をリダイレクトし、Springはそこでそれを見つけることができません。 https://docs.microsoft.com/en-gb/azure/app-service-web/app-service-web-configure-tls-mutual-authAzureのSpringブート - リクエストヘッダのクライアント証明書
IはOncePerRequestFilterのヘッダから証明書を抽出し、このような要求に設定しようとした: =>認証は、Microsoftのドキュメントは、.NETアプリケーションでこれを処理する方法を示し
失敗
public class AzureCertificateFilter extends OncePerRequestFilter {
private static final Logger LOG = LoggerFactory.getLogger(AzureCertifacteFilter.class);
private static final String AZURE_CLIENT_CERTIFICATE_HEADER = "X-ARR-ClientCert";
private static final String JAVAX_SERVLET_REQUEST_X509_CERTIFICATE = "javax.servlet.request.X509Certificate";
private static final String BEGIN_CERT = "-----BEGIN CERTIFICATE-----\n";
private static final String END_CERT = "\n-----END CERTIFICATE-----";
@Override
protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
X509Certificate x509Certificate = extractClientCertificate(httpServletRequest);
// azure redirects the certificate in a header field
if (x509Certificate == null && StringUtils.isNotBlank(httpServletRequest.getHeader(AZURE_CLIENT_CERTIFICATE_HEADER))) {
String x509CertHeader = BEGIN_CERT + httpServletRequest.getHeader(AZURE_CLIENT_CERTIFICATE_HEADER) + END_CERT;
try (ByteArrayInputStream certificateStream = new ByteArrayInputStream(x509CertHeader.getBytes())) {
X509Certificate certificate = (X509Certificate) CertificateFactory.getInstance("X.509").generateCertificate(certificateStream);
httpServletRequest.setAttribute(JAVAX_SERVLET_REQUEST_X509_CERTIFICATE, certificate);
} catch (CertificateException e) {
LOG.error("X.509 certificate could not be created out of the header field {}. Exception: {}", AZURE_CLIENT_CERTIFICATE_HEADER, e.getMessage());
}
}
filterChain.doFilter(httpServletRequest, httpServletResponse);
}
private X509Certificate extractClientCertificate(HttpServletRequest request) {
X509Certificate[] certs = (X509Certificate[]) request.getAttribute(JAVAX_SERVLET_REQUEST_X509_CERTIFICATE);
if (certs != null && certs.length > 0) {
LOG.debug("X.509 client authentication certificate:" + certs[0]);
return certs[0];
}
LOG.debug("No client certificate found in request.");
return null;
}
}
しかし、これは後に、次の例外を除いて春フィルタチェーンの失敗:
sun.security.x509.X509CertImpl cannot be cast to [Ljava.security.cert.X509Certificate; /oaa/v1/spaces
設定は次のようになります。
@Override
public void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.antMatchers("**/docs/restapi/**").permitAll()
.anyRequest().authenticated()
.and()
.httpBasic()
.disable()
.addFilterBefore(new AzureCertificateFilter(), X509AuthenticationFilter.class)
.x509()
.subjectPrincipalRegex("CN=(.*?)(?:,|$)")
.userDetailsService(userDetailsService());
}