org.apache.shiro.crypto.CryptoException: Unable to execute 'doFinal' with cipher instance [javax.crypto.Cipher@77a2823e].
at org.apache.shiro.crypto.JcaCipherService.crypt(JcaCipherService.java:462) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.crypto.JcaCipherService.crypt(JcaCipherService.java:445) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.crypto.JcaCipherService.decrypt(JcaCipherService.java:390) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.crypto.JcaCipherService.decrypt(JcaCipherService.java:382) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.mgt.AbstractRememberMeManager.decrypt(AbstractRememberMeManager.java:482) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.mgt.AbstractRememberMeManager.convertBytesToPrincipals(AbstractRememberMeManager.java:419) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.mgt.AbstractRememberMeManager.getRememberedPrincipals(AbstractRememberMeManager.java:386) ~[shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.mgt.DefaultSecurityManager.getRememberedIdentity(DefaultSecurityManager.java:612) [shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.mgt.DefaultSecurityManager.resolvePrincipals(DefaultSecurityManager.java:500) [shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.mgt.DefaultSecurityManager.createSubject(DefaultSecurityManager.java:346) [shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.subject.Subject$Builder.buildSubject(Subject.java:845) [shiro-core-1.4.0.jar:1.4.0]
at org.apache.shiro.web.subject.WebSubject$Builder.buildWebSubject(WebSubject.java:148) [shiro-web-1.4.0.jar:1.4.0]
at org.apache.shiro.web.servlet.AbstractShiroFilter.createSubject(AbstractShiroFilter.java:292) [shiro-web-1.4.0.jar:1.4.0]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:359) [shiro-web-1.4.0.jar:1.4.0]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.4.0.jar:1.4.0]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.16.jar:9.0.16]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.16.jar:9.0.16]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_201]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_201]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.16.jar:9.0.16]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]
Caused by: javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
at com.sun.crypto.provider.CipherCore.unpad(CipherCore.java:975) ~[sunjce_provider.jar:1.8.0_201]
at com.sun.crypto.provider.CipherCore.fillOutputBuffer(CipherCore.java:1056) ~[sunjce_provider.jar:1.8.0_201]
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:853) ~[sunjce_provider.jar:1.8.0_201]
at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:446) ~[sunjce_provider.jar:1.8.0_201]
at javax.crypto.Cipher.doFinal(Cipher.java:2164) ~[na:1.8.0_191]
at org.apache.shiro.crypto.JcaCipherService.crypt(JcaCipherService.java:459) ~[shiro-core-1.4.0.jar:1.4.0]
... 36 common frames omitted 每次登陸都會報這個錯誤，嘗試了很多次都沒解決，代碼重編譯後清除浏覽器cookie登陸就會出現這個報錯，雖然不影響登陸但是看着很不爽！！！！
問題産生的原因是rememberMe的cookie在第二次打開頁面後shiro無法解密，經過查詢資料以及代碼跟蹤
發現了原因所在
先附上rememberMe管理器配置
@Bean
public CookieRememberMeManager cookieRememberMeManager() {
CookieRememberMeManager cookieRememberMeManager = new CookieRememberMeManager();
SimpleCookie simpleCookie = new SimpleCookie("rememberMe");
simpleCookie.setMaxAge(259200000);
cookieRememberMeManager.setCookie(simpleCookie);
return cookieRememberMeManager;
} 然後跟蹤管理器源碼發現，rememberMeManager繼承了AbstractRememberMeManager，然而AbstractRememberMeManager的構造方法中每次都會重新生成對稱加密密鑰！！！！意味着每次重新開機程式都會重新生成一對加解密密鑰！！！
public AbstractRememberMeManager() {
this.serializer = new DefaultSerializer<PrincipalCollection>();
AesCipherService cipherService = new AesCipherService();
this.cipherService = cipherService;
setCipherKey(cipherService.generateNewKey().getEncoded());
}
public void setCipherKey(byte[] cipherKey) {
//Since this method should only be used in symmetric ciphers
//(where the enc and dec keys are the same), set it on both:
setEncryptionCipherKey(cipherKey);
setDecryptionCipherKey(cipherKey);
} 這就會導緻了，第一次啟動程式shiro使用A密鑰加密了cookie，第二次啟動程式shiro重新生成了密鑰B，當使用者通路頁面時，shiro會用密鑰B去解密上一次用密鑰A加密的cookie，導緻解密失敗，導緻報錯，是以這不影響使用者登入操作(rememberMe失效罷了)，是以這種異常隻會在程式重新開機(shiro清除session)第一次打開頁面的時候出現
解決辦法：
既然每次重新開機都會重新生成一對密鑰，那我們就手動設定一個加解密密鑰
主動設定cipherkey！！
xml配置方式
<bean id="rememberMeManager" class="org.apache.shiro.web.mgt.CookieRememberMeManager">
<property name="cipherKey" value="#{T(org.apache.shiro.codec.Base64).decode('6ZmI6I2j5Y+R5aSn5ZOlAA==')}"/>
<property name="cookie" ref="rememberCookie"/>
</bean> springboot代碼配置方式
@Bean
public CookieRememberMeManager cookieRememberMeManager() {
CookieRememberMeManager cookieRememberMeManager = new CookieRememberMeManager();
SimpleCookie simpleCookie = new SimpleCookie("rememberMe");
simpleCookie.setMaxAge(259200000);
cookieRememberMeManager.setCookie(simpleCookie);
cookieRememberMeManager.setCipherKey(Base64.decode("6ZmI6I2j5Y+R5aSn5ZOlAA=="));
return cookieRememberMeManager;
}