Illegal key size 报错问题

在搬砖时发现如下问题

对应的方法报错500：

 具体错误如下：

2022-08-03 11:49:20.727 ERROR 36056 --- [nio-8999-exec-8] o.s.c.l.e.BladeRestExceptionTranslator   : 系统异常


java.security.InvalidKeyException: Illegal key size

	at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1039)

	at javax.crypto.Cipher.implInit(Cipher.java:805)

	at javax.crypto.Cipher.chooseProvider(Cipher.java:864)

	at javax.crypto.Cipher.init(Cipher.java:1396)

	at javax.crypto.Cipher.init(Cipher.java:1327)

	at org.springblade.core.tool.utils.AesUtil.aes(AesUtil.java:268)

	at org.springblade.core.tool.utils.AesUtil.encrypt(AesUtil.java:240)

	at org.springblade.core.tool.utils.AesUtil.encrypt(AesUtil.java:79)

	at org.springblade.core.tool.utils.AesUtil.encryptToBase64(AesUtil.java:123)

	at org.springblade.core.api.crypto.util.ApiCryptoUtil.encryptData(ApiCryptoUtil.java:73)

	at org.springblade.core.api.crypto.core.ApiEncryptResponseBodyAdvice.beforeBodyWrite(ApiEncryptResponseBodyAdvice.java:59)

	at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyAdviceChain.processBody(RequestResponseBodyAdviceChain.java:141)

	at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyAdviceChain.beforeBodyWrite(RequestResponseBodyAdviceChain.java:116)

	at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:268)

	at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:181)

	at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:82)

	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:123)

	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)

	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)

	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)

	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)

	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)

	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:626)

	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.springblade.core.log.filter.LogTraceFilter.doFilter(LogTraceFilter.java:39)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.springblade.core.boot.request.BladeRequestFilter.doFilter(BladeRequestFilter.java:58)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:124)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)

	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)

	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:97)

	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)

	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)

	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)

	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)

	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)

	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)

	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)

	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)

	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)

	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)

	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)

	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

	at java.lang.Thread.run(Thread.java:745)

异常原因：如果密钥大于128, 会抛出java.security.InvalidKeyException: Illegal key size 异常. 因为密钥长度是受限制的, java运行时环境读到的是受限的policy文件. 文件位于${java_home}/jre/lib/security, 这种限制是因为美国对软件出口的控制.
处理办法：将如下链接Illegalkeysize报错问题-Java文档类资源-CSDN下载两个jar包：local_policy.jar和 US_export_policy.jar下载后，

将解压后的文件覆盖 …/jdk1.8.0_151/jre/lib/security/policy/limited/文件夹的local_policy.jar和US_export_policy.jar 
重启tomcat

然后不再报错