配置 https 证书，如果证书过期，希望不影响访问，这个怎么做。

帮公司的安卓小哥来提个问题：之前项目是没有配置证书的，可以被抓包，现在为了防止抓包，就需要配置 https 证书。首先静态配置证书是属于写到 network_security_config_app.xml 这个证书，直接配置到网络认证文件里，这个种情况有个不好就是如果哪天证书过期了，那就无法通过网络认证了，但是不希望如此，希望如果过期了那就忽略认证，所以需要动态配置 ssl 不直接配置到文件中，通过代码去认证，先去判断证书有效，如果无或者不能找到证书直接走信任证书，如果有效那就走证书认证，目前没配置的表现就是可以被抓包。请问大家，有过这方面的经验吗？ GPT 代码帮忙解决了，但是因为是知识盲区想请教一下诸位。 package com.wlld.common.network

import android.content.Context import android.util.Log import com.wlld.common.utils.LogUtils import okhttp3.OkHttpClient import javax.net.ssl.SSLContext import javax.net.ssl.TrustManager import javax.net.ssl.X509TrustManager import java.security.SecureRandom

/**

• OkHttp SSL 配置工具类

• 提供动态证书校验支持 */ object SSLConfigUtil {

  private const val TAG = "SSLConfigUtil" private var dynamicTrustManager: DynamicSSLTrustManager? = null

  /**

  • 配置 OkHttp 使用动态 SSL 证书校验 */ fun OkHttpClient.Builder.configureDynamicSSL(context: Context): OkHttpClient.Builder { LogUtils.d(TAG, " 开始配置动态 SSL...") return try { // 创建动态信任管理器 dynamicTrustManager = DynamicSSLTrustManager.create(context) LogUtils.d(TAG, " 动态信任管理器创建成功")

     // 创建 SSL 上下文 val sslCOntext= SSLContext.getInstance("TLS") sslContext.init(null, arrayOf<TrustManager>(dynamicTrustManager!!), SecureRandom()) LogUtils.d(TAG, " SSL 上下文初始化完成") // 配置 SSL Socket Factory sslSocketFactory(sslContext.socketFactory, dynamicTrustManager!!) LogUtils.d(TAG, " SSL Socket Factory 配置完成") LogUtils.d(TAG, " 动态 SSL 配置应用成功！") this 

    } catch (e: Exception) { Log.e(TAG, " 动态 SSL 配置失败", e) // 降级到不安全的配置（仅用于紧急情况） configureUnsafeSSL() } }

  /**

  • 配置不安全的 SSL （信任所有证书）

  • 仅在紧急情况下使用 */ private fun OkHttpClient.Builder.configureUnsafeSSL(): OkHttpClient.Builder { Log.w(TAG, "Using unsafe SSL configuration - trusts all certificates") return try { val trustAllCerts = arrayOf<TrustManager>(object : X509TrustManager { override fun checkClientTrusted(chain: Array<out java.security.cert.X509Certificate>, authType: String) {} override fun checkServerTrusted(chain: Array<out java.security.cert.X509Certificate>, authType: String) {} override fun getAcceptedIssuers(): Array<java.security.cert.X509Certificate> = arrayOf() })

     val sslCOntext= SSLContext.getInstance("SSL") sslContext.init(null, trustAllCerts, SecureRandom()) sslSocketFactory(sslContext.socketFactory, trustAllCerts[0] as X509TrustManager) hostnameVerifier { _, _ -> true } this 

    } catch (e: Exception) { Log.e(TAG, "Failed to configure unsafe SSL", e) this } }

  /**

  • 动态添加证书 */ fun addCertificate(certificate: java.security.cert.X509Certificate) { dynamicTrustManager?.addCertificate(certificate) }

  /**

  • 从字节数组添加证书 */ fun addCertificateFromBytes(certificateBytes: ByteArray) { dynamicTrustManager?.addCertificateFromBytes(certificateBytes) }

  /**

  • 设置是否跳过证书校验 */ fun setSkipValidation(skip: Boolean) { dynamicTrustManager?.setSkipValidation(skip) }

  /**

  • 检查是否跳过校验模式 */ fun isSkipValidationEnabled(): Boolean { return dynamicTrustManager?.isSkipValidationEnabled() ?: false }

  /**

  • 获取证书信息 */ fun getCertificateInfo(): List<String> { return dynamicTrustManager?.getCertificateInfo() ?: emptyList() }

  /**

  • 检查证书是否过期 */ fun isCertificateExpired(certificate: java.security.cert.X509Certificate): Boolean { return DynamicSSLTrustManager.isCertificateExpired(certificate) }

  /**

  • 重置 SSL 配置 */ fun reset() { dynamicTrustManager = null LogUtils.d(TAG, "SSL configuration reset") } }

package com.wlld.common.network

import android.content.Context import android.util.Log import com.wlld.common.R import java.io.ByteArrayInputStream import java.io.InputStream import java.security.KeyStore import java.security.KeyStoreException import java.security.NoSuchAlgorithmException import java.security.PrivateKey import java.security.cert.Certificate import java.security.cert.CertificateException import java.security.cert.CertificateFactory import java.security.cert.X509Certificate import java.util.Date import javax.net.ssl.TrustManagerFactory import javax.net.ssl.X509TrustManager

/**

• 动态 HTTPS 证书校验工具类

• 当证书过期时跳过校验，确保应用正常运行 */ class DynamicSSLTrustManager( private val context: Context ) : X509TrustManager {

  private val defaultTrustManager: X509TrustManager private val customCertificates: MutableList<X509Certificate> = mutableListOf() private var skipValidation = false

  companion object { private const val TAG = "DynamicSSLTrustManager"

   // 检查证书是否过期 fun isCertificateExpired(certificate: X509Certificate): Boolean { return try { val expiratiOnDate= certificate.notAfter expirationDate.before(Date()) } catch (e: Exception) { Log.e(TAG, "证书过期检查出错", e) true // 如果无法检查，默认认为过期 } } // 创建动态信任管理器 fun create(context: Context): DynamicSSLTrustManager { return DynamicSSLTrustManager(context) } 

  }

  init { Log.d(TAG, " DynamicSSLTrustManager 初始化开始")

   // 初始化默认信任管理器 defaultTrustManager = createDefaultTrustManager() Log.d(TAG, " 默认信任管理器初始化完成") // 加载自定义证书 loadCustomCertificates() Log.d(TAG, " DynamicSSLTrustManager 初始化完成 - 跳过校验模式: $skipValidation, 自定义证书数量: ${customCertificates.size}") 

  }

  private fun createDefaultTrustManager(): X509TrustManager { return try { val trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()) trustManagerFactory.init(null as KeyStore?) val trustManagers = trustManagerFactory.trustManagers trustManagers.firstOrNull { it is X509TrustManager } as? X509TrustManager ?: throw IllegalStateException("Default X509TrustManager not found") } catch (e: Exception) { Log.e(TAG, "Failed to create default trust manager", e) throw RuntimeException("Failed to initialize SSL trust manager", e) } }

  private fun loadCustomCertificates() { try { // 加载 assets 中的证书文件 loadCertificateFromAssets("weilaiqiyuan.cer")

   // 可以继续加载其他证书 // loadCertificateFromAssets("other_certificate.cer") Log.d(TAG, "已加载 ${customCertificates.size} 个自定义证书") // 如果没有找到任何证书，启用跳过校验模式 if (customCertificates.isEmpty()) { Log.w(TAG, "未找到任何自定义证书，启用跳过校验模式") skipValidation = true } } catch (e: Exception) { Log.e(TAG, "加载自定义证书失败，启用跳过校验模式", e) skipValidation = true } 

  }

  private fun loadCertificateFromAssets(fileName: String) { try { context.assets.open(fileName).use { inputStream -> val certificate = loadCertificateFromStream(inputStream) if (certificate != null) { customCertificates.add(certificate) Log.d(TAG, "已加载证书: $fileName, 过期时间: ${certificate.notAfter}")

   // 检查证书是否过期 if (isCertificateExpired(certificate)) { Log.w(TAG, "证书 $fileName 已过期，启用跳过校验模式") skipValidation = true } } } } catch (e: Exception) { Log.e(TAG, "从 assets 加载证书失败: $fileName", e) } 

  }

  private fun loadCertificateFromStream(inputStream: InputStream): X509Certificate? { return try { val certificateFactory = CertificateFactory.getInstance("X.509") certificateFactory.generateCertificate(inputStream) as X509Certificate } catch (e: Exception) { Log.e(TAG, "解析证书失败", e) null } }

  /**

  • 动态添加证书 */ fun addCertificate(certificate: X509Certificate) { customCertificates.add(certificate) Log.d(TAG, "已添加新证书, 过期时间: ${certificate.notAfter}")

    // 检查新添加的证书是否过期 if (isCertificateExpired(certificate)) { Log.w(TAG, "新添加的证书已过期，启用跳过校验模式") skipValidation = true } }

  /**

  • 动态添加证书从字节数组 */ fun addCertificateFromBytes(certificateBytes: ByteArray) { try { val inputStream = ByteArrayInputStream(certificateBytes) val certificate = loadCertificateFromStream(inputStream) certificate?.let { addCertificate(it) } } catch (e: Exception) { Log.e(TAG, "从字节数组添加证书失败", e) } }

  /**

  • 设置是否跳过校验 */ fun setSkipValidation(skip: Boolean) { skipValidation = skip Log.i(TAG, "跳过校验模式: $skip") }

  /**

  跳过校验模式是否开启 */ fun isSkipValidationEnabled(): Boolean { return skipValidation }

  /**

  • 检查证书链中的所有证书是否有效 */ private fun checkCertificatesValidity(chain: Array<X509Certificate>): Boolean { return chain.all { certificate -> val isValid = !isCertificateExpired(certificate) if (!isValid) { Log.w(TAG, "证书已过期: ${certificate.subjectDN}, 过期时间: ${certificate.notAfter}") } isValid } }

  override fun checkClientTrusted(chain: Array<out X509Certificate>, authType: String) { // if (skipValidation) { // Log.w(TAG, " 跳过客户端证书校验（证书过期或未找到）- 这可能导致抓包风险！") // return // } // // // 先检查自定义证书 // if (validateCustomCertificates(chain)) { // Log.d(TAG, "使用有效的自定义证书") // return // } // // // 使用默认校验 // try { // defaultTrustManager.checkClientTrusted(chain, authType) // } catch (e: CertificateException) { // Log.w(TAG, "默认客户端证书校验失败", e) // // // 检查是否因为过期导致的失败 // if (!checkCertificatesValidity(chain as Array<X509Certificate>)) { // Log.w(TAG, "客户端证书已过期，启用跳过校验模式") // skipValidation = true // return // } // // throw e // } }

  override fun checkServerTrusted(chain: Array<out X509Certificate>, authType: String) { Log.d(TAG, " checkServerTrusted 被调用 - 验证服务器证书，authType: $authType") if (skipValidation) { Log.i(TAG, "跳过服务端证书校验（证书过期或未找到）") return }

   // 先检查自定义证书 if (validateCustomCertificates(chain)) { return } // 使用默认校验 try { defaultTrustManager.checkServerTrusted(chain, authType) } catch (e: CertificateException) { Log.w(TAG, "默认服务端证书校验失败", e) // 检查是否因为过期导致的失败 if (!checkCertificatesValidity(chain as Array<X509Certificate>)) { Log.w(TAG, "服务端证书已过期，启用跳过校验模式") skipValidation = true return } throw e } 

  }

  override fun getAcceptedIssuers(): Array<X509Certificate> { return if (skipValidation) { // 跳过校验时返回空数组，接受所有证书 emptyArray() } else { // 返回默认接受的证书颁发机构 defaultTrustManager.acceptedIssuers + customCertificates.toTypedArray() } }

  /**

  • 验证自定义证书链 */ private fun validateCustomCertificates(chain: Array<out X509Certificate>): Boolean { if (customCertificates.isEmpty()) { return false }

 // 检查链中的证书是否与自定义证书匹配 for (cert in chain) { for (customCert in customCertificates) { if (cert.subjectDN == customCert.subjectDN) { // 找到匹配的自定义证书 if (!isCertificateExpired(customCert)) { // 严格验证证书：比较公钥指纹，防止证书伪造 if (verifyCertificateFingerprint(cert, customCert)) { Log.d(TAG, " 证书验证通过（指纹匹配）: ${cert.subjectDN}") return true } else { Log.w(TAG, " 证书验证失败（指纹不匹配）- 可能是抓包攻击！") // 指纹不匹配，拒绝连接 throw CertificateException("证书指纹验证失败，可能存在中间人攻击") } } else { Log.w(TAG, "自定义证书已过期: ${cert.subjectDN}") return false } } } } return false } /** * 验证证书指纹，防止证书伪造 */ private fun verifyCertificateFingerprint(cert1: X509Certificate, cert2: X509Certificate): Boolean { return try { // 比较公钥的 SHA-256 指纹 val pubkey1 = cert1.publicKey.encoded val pubkey2 = cert2.publicKey.encoded val digest1 = java.security.MessageDigest.getInstance("SHA-256").digest(pubkey1) val digest2 = java.security.MessageDigest.getInstance("SHA-256").digest(pubkey2) val fingerprint1 = digest1.joinToString("") { "%02X".format(it) } val fingerprint2 = digest2.joinToString("") { "%02X".format(it) } val isValid = fingerprint1 == fingerprint2 Log.d(TAG, "证书指纹对比: $fingerprint1 vs $fingerprint2, 匹配: $isValid") isValid } catch (e: Exception) { Log.e(TAG, "证书指纹验证失败", e) false } } /** * 从 SubjectDN 中提取 Common Name */ private fun extractCommonName(subjectDN: String): String { val cnPattern = "CN=([^,]+)".toRegex() val match = cnPattern.find(subjectDN) return match?.groupValues?.get(1) ?: "" } /** * 获取自定义证书信息 */ fun getCertificateInfo(): List<String> { return customCertificates.map { cert -> "Subject: ${cert.subjectDN}, Issuer: ${cert.issuerDN}, Expires: ${cert.notAfter}, Expired: ${isCertificateExpired(cert)}" } }