Spring Security SAML2 使用 G Suite 作为 Idp

Question

我正在尝试使用Spring Security(5.3.3.RELEASE(来处理Spring Boot应用程序中的SAML2身份验证。带有SP和G Suite的Spring Boot应用程序将成为IDP。

在我的Maven pom.xml文件中，我有：

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-saml2-service-provider</artifactId>
</dependency>

在我的代码中，我有：

@EnableWebSecurity
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
@Bean
public RelyingPartyRegistration googleRegistration() throws CertificateException {
final String idpEntityId = "https://accounts.google.com/o/saml2?idpid=REDACTED";
final String webSsoEndpoint = "https://accounts.google.com/o/saml2/idp?idpid=REDACTED";
final String registrationId = "gsuite";
final String localEntityIdTemplate = "{baseUrl}/saml2/service-provider-metadata/{registrationId}";
final String acsUrlTemplate = "{baseUrl}/login/saml2/sso/{registrationId}";
final byte[] certBytes = ("-----BEGIN CERTIFICATE-----n" +
"REDACTEDn" +
"-----END CERTIFICATE-----").getBytes();
final InputStream is = new ByteArrayInputStream(certBytes);
final CertificateFactory cf = CertificateFactory.getInstance("X.509");
final X509Certificate cert = (X509Certificate) cf.generateCertificate(is);
final Saml2X509Credential credential = new Saml2X509Credential(cert,
Saml2X509CredentialType.SIGNING); // THIS IS THE PROBLEM
return RelyingPartyRegistration.withRegistrationId(registrationId)
.providerDetails(config -> config.entityId(idpEntityId))
.providerDetails(config -> config.webSsoUrl(webSsoEndpoint))
.credentials(c -> c.add(credential))
.localEntityIdTemplate(localEntityIdTemplate)
.assertionConsumerServiceUrlTemplate(acsUrlTemplate)
.build();
}
@Bean
public RelyingPartyRegistrationRepository relyingPartyRegistrationRepository(
final RelyingPartyRegistration googleRegistration) {
return new InMemoryRelyingPartyRegistrationRepository(googleRegistration);
}
@Override
protected void configure(final HttpSecurity http) throws Exception {
http
.authorizeRequests(authorize -> authorize
.anyRequest().authenticated())
.saml2Login();
}
}

问题是我需要一个签名密钥，但该行final Saml2X509Credential credential = new Saml2X509Credential(cert, Saml2X509CredentialType.SIGNING);抛出异常，因为您必须将PrivateKey传递到该构造函数中才能将其用于SIGNING类型。但是，如果我使用该凭据进行验证，则应用将失败，并出现需要签名密钥的异常。

G Suite 仅提供元数据 XML 文件(Spring Security 不支持(和.pem文件。我将.pem文件中的所有文本复制到上面的字符串中以生成 X509 证书。

在Spring Security SAML的文档中，它们显示2个证书，但G Suite仅提供1个证书。我应该从 .pem 文件生成私钥吗？如果是这样，如何？

Answer 1

让它工作了！

关键是禁用签名。

@Bean
public RelyingPartyRegistration googleRegistration() throws CertificateException {
// remote IDP entity ID
final String idpEntityId = "https://accounts.google.com/o/saml2?idpid=REDACTED";
// remote WebSSO Endpoint - Where to Send AuthNRequests to
final String webSsoEndpoint = "https://accounts.google.com/o/saml2/idp?idpid=REDACTED";
// local registration ID
final String registrationId = "gsuite";
// local entity ID - autogenerated based on URL
final String localEntityIdTemplate = "{baseUrl}/saml2/service-provider-metadata/{registrationId}";
// local SSO URL - autogenerated, endpoint to receive SAML Response objects
final String acsUrlTemplate = "{baseUrl}/login/saml2/sso/{registrationId}";
// local signing (and local decryption key and remote encryption certificate)
final byte[] certBytes = ("-----BEGIN CERTIFICATE-----n" +
"REDACTEDn" +
"-----END CERTIFICATE-----").getBytes();
final InputStream is = new ByteArrayInputStream(certBytes);
final CertificateFactory cf = CertificateFactory.getInstance("X.509");
final X509Certificate cert = (X509Certificate) cf.generateCertificate(is);
final Saml2X509Credential credential = new Saml2X509Credential(cert,
Saml2X509CredentialType.VERIFICATION, Saml2X509CredentialType.ENCRYPTION);
return RelyingPartyRegistration.withRegistrationId(registrationId)
.providerDetails(config -> config.entityId(idpEntityId))
.providerDetails(config -> config.webSsoUrl(webSsoEndpoint))
.providerDetails(config -> config.signAuthNRequest(false)) // THIS IS THE KEY
.credentials(c -> c.add(credential))
.localEntityIdTemplate(localEntityIdTemplate)
.assertionConsumerServiceUrlTemplate(acsUrlTemplate)
.build();
}