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Xss过滤器(Java)

亚林瓜子
 亚林瓜子
发布于 08/20 10:49
字数 3767
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问题

最近旧的系统,遇到Xss安全问题。这个系统采用用的是spring mvc的maven工程。

解决

maven依赖配置

<properties>
	<easapi.version>2.2.0.0</easapi.version>
</properties>
<dependencies>
	<dependency>
		<groupId>org.owasp.esapi</groupId>
		<artifactId>esapi</artifactId>
		<version>${easapi.version}</version>
	</dependency>
<dependencies>

这里使用的OWASP提供的API,全称OWASP Enterprise Security API,主要是用来规整输入的数据,安全测试的朋友们会切换不同的编码进行参数的输入。

配置ESAPI

ESAPI配置文件

ESAPI主要涉及这两个配置文件:ESAPI.properties和validation.properties,这两个文件来源这个地址:https://github.com/OWASP/EJSF/tree/master/auction_example/WebContent/WEB-INF

ESAPI.properties

#
# OWASP Enterprise Security API (ESAPI) Properties file -- PRODUCTION Version
# 
# This file is part of the Open Web Application Security Project (OWASP)
# Enterprise Security API (ESAPI) project. For details, please see
# http://www.owasp.org/index.php/ESAPI.
#
# Copyright (c) 2008,2009 - The OWASP Foundation
#
# DISCUSS: This may cause a major backwards compatibility issue, etc. but
#		   from a name space perspective, we probably should have prefaced
#		   all the property names with ESAPI or at least OWASP. Otherwise
#		   there could be problems is someone loads this properties file into
#		   the System properties.  We could also put this file into the
#		   esapi.jar file (perhaps as a ResourceBundle) and then allow an external
#		   ESAPI properties be defined that would overwrite these defaults.
#		   That keeps the application's properties relatively simple as usually
#		   they will only want to override a few properties. If looks like we
#		   already support multiple override levels of this in the
#		   DefaultSecurityConfiguration class, but I'm suggesting placing the
#		   defaults in the esapi.jar itself. That way, if the jar is signed,
#		   we could detect if those properties had been tampered with. (The
#		   code to check the jar signatures is pretty simple... maybe 70-90 LOC,
#		   but off course there is an execution penalty (similar to the way
#		   that the separate sunjce.jar used to be when a class from it was
#		   first loaded). Thoughts?
###############################################################################
#
# WARNING: Operating system protection should be used to lock down the .esapi
# resources directory and all the files inside and all the directories all the
# way up to the root directory of the file system.  Note that if you are using
# file-based implementations, that some files may need to be read-write as they
# get updated dynamically.
#
# Before using, be sure to update the MasterKey and MasterSalt as described below.
# N.B.: If you had stored data that you have previously encrypted with ESAPI 1.4,
#		you *must* FIRST decrypt it using ESAPI 1.4 and then (if so desired)
#		re-encrypt it with ESAPI 2.0. If you fail to do this, you will NOT be
#		able to decrypt your data with ESAPI 2.0.
#
#		YOU HAVE BEEN WARNED!!! More details are in the ESAPI 2.0 Release Notes.
#
#===========================================================================
# ESAPI Configuration
#
# If true, then print all the ESAPI properties set here when they are loaded.
# If false, they are not printed. Useful to reduce output when running JUnit tests.
# If you need to troubleshoot a properties related problem, turning this on may help.
# This is 'false' in the src/test/resources/.esapi version. It is 'true' by
# default for reasons of backward compatibility with earlier ESAPI versions.
ESAPI.printProperties=true

# ESAPI is designed to be easily extensible. You can use the reference implementation
# or implement your own providers to take advantage of your enterprise's security
# infrastructure. The functions in ESAPI are referenced using the ESAPI locator, like:
#
#    String ciphertext =
#		ESAPI.encryptor().encrypt("Secret message");   // Deprecated in 2.0
#    CipherText cipherText =
#		ESAPI.encryptor().encrypt(new PlainText("Secret message")); // Preferred
#
# Below you can specify the classname for the provider that you wish to use in your
# application. The only requirement is that it implement the appropriate ESAPI interface.
# This allows you to switch security implementations in the future without rewriting the
# entire application.
#
# ExperimentalAccessController requires ESAPI-AccessControlPolicy.xml in .esapi directory
ESAPI.AccessControl=org.owasp.esapi.reference.DefaultAccessController
# FileBasedAuthenticator requires users.txt file in .esapi directory
ESAPI.Authenticator=org.owasp.esapi.reference.FileBasedAuthenticator
ESAPI.Encoder=org.owasp.esapi.reference.DefaultEncoder
ESAPI.Encryptor=org.owasp.esapi.reference.crypto.JavaEncryptor

ESAPI.Executor=org.owasp.esapi.reference.DefaultExecutor
ESAPI.HTTPUtilities=org.owasp.esapi.reference.DefaultHTTPUtilities
ESAPI.IntrusionDetector=org.owasp.esapi.reference.DefaultIntrusionDetector
# Log4JFactory Requires log4j.xml or log4j.properties in classpath - http://www.laliluna.de/log4j-tutorial.html
ESAPI.Logger=org.owasp.esapi.reference.Log4JLogFactory
#ESAPI.Logger=org.owasp.esapi.reference.JavaLogFactory
ESAPI.Randomizer=org.owasp.esapi.reference.DefaultRandomizer
ESAPI.Validator=org.owasp.esapi.reference.DefaultValidator

#===========================================================================
# ESAPI Authenticator
#
Authenticator.AllowedLoginAttempts=3
Authenticator.MaxOldPasswordHashes=13
Authenticator.UsernameParameterName=username
Authenticator.PasswordParameterName=password
# RememberTokenDuration (in days)
Authenticator.RememberTokenDuration=14
# Session Timeouts (in minutes)
Authenticator.IdleTimeoutDuration=20
Authenticator.AbsoluteTimeoutDuration=120

#===========================================================================
# ESAPI Encoder
#
# ESAPI canonicalizes input before validation to prevent bypassing filters with encoded attacks.
# Failure to canonicalize input is a very common mistake when implementing validation schemes.
# Canonicalization is automatic when using the ESAPI Validator, but you can also use the
# following code to canonicalize data.
#
#      ESAPI.Encoder().canonicalize( "%22hello world&#x22;" );
#  
# Multiple encoding is when a single encoding format is applied multiple times. Allowing
# multiple encoding is strongly discouraged.
Encoder.AllowMultipleEncoding=false

# Mixed encoding is when multiple different encoding formats are applied, or when 
# multiple formats are nested. Allowing multiple encoding is strongly discouraged.
Encoder.AllowMixedEncoding=false

# The default list of codecs to apply when canonicalizing untrusted data. The list should include the codecs
# for all downstream interpreters or decoders. For example, if the data is likely to end up in a URL, HTML, or
# inside JavaScript, then the list of codecs below is appropriate. The order of the list is not terribly important.
Encoder.DefaultCodecList=HTMLEntityCodec,PercentCodec,JavaScriptCodec


#===========================================================================
# ESAPI Encryption
#
# The ESAPI Encryptor provides basic cryptographic functions with a simplified API.
# To get started, generate a new key using java -classpath esapi.jar org.owasp.esapi.reference.crypto.JavaEncryptor
# There is not currently any support for key rotation, so be careful when changing your key and salt as it
# will invalidate all signed, encrypted, and hashed data.
#
# WARNING: Not all combinations of algorithms and key lengths are supported.
# If you choose to use a key length greater than 128, you MUST download the
# unlimited strength policy files and install in the lib directory of your JRE/JDK.
# See http://java.sun.com/javase/downloads/index.jsp for more information.
#
# Backward compatibility with ESAPI Java 1.4 is supported by the two deprecated API
# methods, Encryptor.encrypt(String) and Encryptor.decrypt(String). However, whenever
# possible, these methods should be avoided as they use ECB cipher mode, which in almost
# all circumstances a poor choice because of it's weakness. CBC cipher mode is the default
# for the new Encryptor encrypt / decrypt methods for ESAPI Java 2.0.  In general, you
# should only use this compatibility setting if you have persistent data encrypted with
# version 1.4 and even then, you should ONLY set this compatibility mode UNTIL
# you have decrypted all of your old encrypted data and then re-encrypted it with
# ESAPI 2.0 using CBC mode. If you have some reason to mix the deprecated 1.4 mode
# with the new 2.0 methods, make sure that you use the same cipher algorithm for both
# (256-bit AES was the default for 1.4; 128-bit is the default for 2.0; see below for
# more details.) Otherwise, you will have to use the new 2.0 encrypt / decrypt methods
# where you can specify a SecretKey. (Note that if you are using the 256-bit AES,
# that requires downloading the special jurisdiction policy files mentioned above.)
#
#		***** IMPORTANT: Do NOT forget to replace these with your own values! *****
# To calculate these values, you can run:
#		java -classpath esapi.jar org.owasp.esapi.reference.crypto.JavaEncryptor
#
Encryptor.MasterKey=dewdewd
Encryptor.MasterSalt=frtghnj

# Provides the default JCE provider that ESAPI will "prefer" for its symmetric
# encryption and hashing. (That is it will look to this provider first, but it
# will defer to other providers if the requested algorithm is not implemented
# by this provider.) If left unset, ESAPI will just use your Java VM's current
# preferred JCE provider, which is generally set in the file
# "$JAVA_HOME/jre/lib/security/java.security".
#
# The main intent of this is to allow ESAPI symmetric encryption to be
# used with a FIPS 140-2 compliant crypto-module. For details, see the section
# "Using ESAPI Symmetric Encryption with FIPS 140-2 Cryptographic Modules" in
# the ESAPI 2.0 Symmetric Encryption User Guide, at:
# http://owasp-esapi-java.googlecode.com/svn/trunk/documentation/esapi4java-core-2.0-symmetric-crypto-user-guide.html
# However, this property also allows you to easily use an alternate JCE provider
# such as "Bouncy Castle" without having to make changes to "java.security".
# See Javadoc for SecurityProviderLoader for further details. If you wish to use
# a provider that is not known to SecurityProviderLoader, you may specify the
# fully-qualified class name of the JCE provider class that implements
# java.security.Provider. If the name contains a '.', this is interpreted as
# a fully-qualified class name that implements java.security.Provider.
#
# NOTE: Setting this property has the side-effect of changing it in your application
#       as well, so if you are using JCE in your application directly rather than
#       through ESAPI (you wouldn't do that, would you? ;-), it will change the
#       preferred JCE provider there as well.
#
# Default: Keeps the JCE provider set to whatever JVM sets it to.
Encryptor.PreferredJCEProvider=

# AES is the most widely used and strongest encryption algorithm. This
# should agree with your Encryptor.CipherTransformation property.
# By default, ESAPI Java 1.4 uses "PBEWithMD5AndDES" and which is
# very weak. It is essentially a password-based encryption key, hashed
# with MD5 around 1K times and then encrypted with the weak DES algorithm
# (56-bits) using ECB mode and an unspecified padding (it is
# JCE provider specific, but most likely "NoPadding"). However, 2.0 uses
# "AES/CBC/PKCSPadding". If you want to change these, change them here.
# Warning: This property does not control the default reference implementation for
#		   ESAPI 2.0 using JavaEncryptor. Also, this property will be dropped
#		   in the future.
# @deprecated
Encryptor.EncryptionAlgorithm=AES
#		For ESAPI Java 2.0 - New encrypt / decrypt methods use this.
Encryptor.CipherTransformation=AES/CBC/PKCS5Padding

# Applies to ESAPI 2.0 and later only!
# Comma-separated list of cipher modes that provide *BOTH*
# confidentiality *AND* message authenticity. (NIST refers to such cipher
# modes as "combined modes" so that's what we shall call them.) If any of these
# cipher modes are used then no MAC is calculated and stored
# in the CipherText upon encryption. Likewise, if one of these
# cipher modes is used with decryption, no attempt will be made
# to validate the MAC contained in the CipherText object regardless
# of whether it contains one or not. Since the expectation is that
# these cipher modes support support message authenticity already,
# injecting a MAC in the CipherText object would be at best redundant.
#
# Note that as of JDK 1.5, the SunJCE provider does not support *any*
# of these cipher modes. Of these listed, only GCM and CCM are currently
# NIST approved. YMMV for other JCE providers. E.g., Bouncy Castle supports
# GCM and CCM with "NoPadding" mode, but not with "PKCS5Padding" or other
# padding modes.
Encryptor.cipher_modes.combined_modes=GCM,CCM,IAPM,EAX,OCB,CWC

# Applies to ESAPI 2.0 and later only!
# Additional cipher modes allowed for ESAPI 2.0 encryption. These
# cipher modes are in _addition_ to those specified by the property
# 'Encryptor.cipher_modes.combined_modes'.
# Note: We will add support for streaming modes like CFB & OFB once
# we add support for 'specified' to the property 'Encryptor.ChooseIVMethod'
# (probably in ESAPI 2.1).
# DISCUSS: Better name?
Encryptor.cipher_modes.additional_allowed=CBC

# 128-bit is almost always sufficient and appears to be more resistant to
# related key attacks than is 256-bit AES. Use '_' to use default key size
# for cipher algorithms (where it makes sense because the algorithm supports
# a variable key size). Key length must agree to what's provided as the
# cipher transformation, otherwise this will be ignored after logging a
# warning.
#
# NOTE: This is what applies BOTH ESAPI 1.4 and 2.0. See warning above about mixing!
Encryptor.EncryptionKeyLength=128

# Because 2.0 uses CBC mode by default, it requires an initialization vector (IV).
# (All cipher modes except ECB require an IV.) There are two choices: we can either
# use a fixed IV known to both parties or allow ESAPI to choose a random IV. While
# the IV does not need to be hidden from adversaries, it is important that the
# adversary not be allowed to choose it. Also, random IVs are generally much more
# secure than fixed IVs. (In fact, it is essential that feed-back cipher modes
# such as CFB and OFB use a different IV for each encryption with a given key so
# in such cases, random IVs are much preferred. By default, ESAPI 2.0 uses random
# IVs. If you wish to use 'fixed' IVs, set 'Encryptor.ChooseIVMethod=fixed' and
# uncomment the Encryptor.fixedIV.
#
# Valid values:		random|fixed|specified		'specified' not yet implemented; planned for 2.1
Encryptor.ChooseIVMethod=random
# If you choose to use a fixed IV, then you must place a fixed IV here that
# is known to all others who are sharing your secret key. The format should
# be a hex string that is the same length as the cipher block size for the
# cipher algorithm that you are using. The following is an *example* for AES
# from an AES test vector for AES-128/CBC as described in:
# NIST Special Publication 800-38A (2001 Edition)
# "Recommendation for Block Cipher Modes of Operation".
# (Note that the block size for AES is 16 bytes == 128 bits.)
#
Encryptor.fixedIV=0x000102030405060708090a0b0c0d0e0f

# Whether or not CipherText should use a message authentication code (MAC) with it.
# This prevents an adversary from altering the IV as well as allowing a more
# fool-proof way of determining the decryption failed because of an incorrect
# key being supplied. This refers to the "separate" MAC calculated and stored
# in CipherText, not part of any MAC that is calculated as a result of a
# "combined mode" cipher mode.
#
# If you are using ESAPI with a FIPS 140-2 cryptographic module, you *must* also
# set this property to false.
Encryptor.CipherText.useMAC=true

# Whether or not the PlainText object may be overwritten and then marked
# eligible for garbage collection. If not set, this is still treated as 'true'.
Encryptor.PlainText.overwrite=true

# Do not use DES except in a legacy situations. 56-bit is way too small key size.
#Encryptor.EncryptionKeyLength=56
#Encryptor.EncryptionAlgorithm=DES

# TripleDES is considered strong enough for most purposes.
#	Note:	There is also a 112-bit version of DESede. Using the 168-bit version
#			requires downloading the special jurisdiction policy from Sun.
#Encryptor.EncryptionKeyLength=168
#Encryptor.EncryptionAlgorithm=DESede

Encryptor.HashAlgorithm=SHA-512
Encryptor.HashIterations=1024
Encryptor.DigitalSignatureAlgorithm=SHA1withDSA
Encryptor.DigitalSignatureKeyLength=1024
Encryptor.RandomAlgorithm=SHA1PRNG
Encryptor.CharacterEncoding=UTF-8

# This is the Pseudo Random Function (PRF) that ESAPI's Key Derivation Function
# (KDF) normally uses. Note this is *only* the PRF used for ESAPI's KDF and
# *not* what is used for ESAPI's MAC. (Currently, HmacSHA1 is always used for
# the MAC, mostly to keep the overall size at a minimum.)
#
# Currently supported choices for JDK 1.5 and 1.6 are:
#	HmacSHA1 (160 bits), HmacSHA256 (256 bits), HmacSHA384 (384 bits), and
#	HmacSHA512 (512 bits).
# Note that HmacMD5 is *not* supported for the PRF used by the KDF even though
# the JDKs support it.  See the ESAPI 2.0 Symmetric Encryption User Guide
# further details.
Encryptor.KDF.PRF=HmacSHA256
#===========================================================================
# ESAPI HttpUtilties
#
# The HttpUtilities provide basic protections to HTTP requests and responses. Primarily these methods 
# protect against malicious data from attackers, such as unprintable characters, escaped characters,
# and other simple attacks. The HttpUtilities also provides utility methods for dealing with cookies,
# headers, and CSRF tokens.
#
# Default file upload location (remember to escape backslashes with \\)
HttpUtilities.UploadDir=C:\\ESAPI\\testUpload
HttpUtilities.UploadTempDir=C:\\temp
# Force flags on cookies, if you use HttpUtilities to set cookies
HttpUtilities.ForceHttpOnlySession=false
HttpUtilities.ForceSecureSession=false
HttpUtilities.ForceHttpOnlyCookies=true
HttpUtilities.ForceSecureCookies=true
# Maximum size of HTTP headers
HttpUtilities.MaxHeaderSize=4096
# File upload configuration
HttpUtilities.ApprovedUploadExtensions=.zip,.pdf,.doc,.docx,.ppt,.pptx,.tar,.gz,.tgz,.rar,.war,.jar,.ear,.xls,.rtf,.properties,.java,.class,.txt,.xml,.jsp,.jsf,.exe,.dll
HttpUtilities.MaxUploadFileBytes=500000000
# Using UTF-8 throughout your stack is highly recommended. That includes your database driver,
# container, and any other technologies you may be using. Failure to do this may expose you
# to Unicode transcoding injection attacks. Use of UTF-8 does not hinder internationalization.
HttpUtilities.ResponseContentType=text/html; charset=UTF-8
# This is the name of the cookie used to represent the HTTP session
# Typically this will be the default "JSESSIONID" 
HttpUtilities.HttpSessionIdName=JSESSIONID



#===========================================================================
# ESAPI Executor
# CHECKME - Not sure what this is used for, but surely it should be made OS independent.
Executor.WorkingDirectory=C:\\Windows\\Temp
Executor.ApprovedExecutables=C:\\Windows\\System32\\cmd.exe,C:\\Windows\\System32\\runas.exe


#===========================================================================
# ESAPI Logging
# Set the application name if these logs are combined with other applications
Logger.ApplicationName=ExampleApplication
# If you use an HTML log viewer that does not properly HTML escape log data, you can set LogEncodingRequired to true
Logger.LogEncodingRequired=false
# Determines whether ESAPI should log the application name. This might be clutter in some single-server/single-app environments.
Logger.LogApplicationName=true
# Determines whether ESAPI should log the server IP and port. This might be clutter in some single-server environments.
Logger.LogServerIP=true
# LogFileName, the name of the logging file. Provide a full directory path (e.g., C:\\ESAPI\\ESAPI_logging_file) if you
# want to place it in a specific directory.
Logger.LogFileName=ESAPI_logging_file
# MaxLogFileSize, the max size (in bytes) of a single log file before it cuts over to a new one (default is 10,000,000)
Logger.MaxLogFileSize=10000000


#===========================================================================
# ESAPI Intrusion Detection
#
# Each event has a base to which .count, .interval, and .action are added
# The IntrusionException will fire if we receive "count" events within "interval" seconds
# The IntrusionDetector is configurable to take the following actions: log, logout, and disable
#  (multiple actions separated by commas are allowed e.g. event.test.actions=log,disable
#
# Custom Events
# Names must start with "event." as the base
# Use IntrusionDetector.addEvent( "test" ) in your code to trigger "event.test" here
# You can also disable intrusion detection completely by changing
# the following parameter to true
#
IntrusionDetector.Disable=false
#
IntrusionDetector.event.test.count=2
IntrusionDetector.event.test.interval=10
IntrusionDetector.event.test.actions=disable,log

# Exception Events
# All EnterpriseSecurityExceptions are registered automatically
# Call IntrusionDetector.getInstance().addException(e) for Exceptions that do not extend EnterpriseSecurityException
# Use the fully qualified classname of the exception as the base

# any intrusion is an attack
IntrusionDetector.org.owasp.esapi.errors.IntrusionException.count=1
IntrusionDetector.org.owasp.esapi.errors.IntrusionException.interval=1
IntrusionDetector.org.owasp.esapi.errors.IntrusionException.actions=log,disable,logout

# for test purposes
# CHECKME: Shouldn't there be something in the property name itself that designates
#		   that these are for testing???
IntrusionDetector.org.owasp.esapi.errors.IntegrityException.count=10
IntrusionDetector.org.owasp.esapi.errors.IntegrityException.interval=5
IntrusionDetector.org.owasp.esapi.errors.IntegrityException.actions=log,disable,logout

# rapid validation errors indicate scans or attacks in progress
# org.owasp.esapi.errors.ValidationException.count=10
# org.owasp.esapi.errors.ValidationException.interval=10
# org.owasp.esapi.errors.ValidationException.actions=log,logout

# sessions jumping between hosts indicates session hijacking
IntrusionDetector.org.owasp.esapi.errors.AuthenticationHostException.count=2
IntrusionDetector.org.owasp.esapi.errors.AuthenticationHostException.interval=10
IntrusionDetector.org.owasp.esapi.errors.AuthenticationHostException.actions=log,logout


#===========================================================================
# ESAPI Validation
#
# The ESAPI Validator works on regular expressions with defined names. You can define names
# either here, or you may define application specific patterns in a separate file defined below.
# This allows enterprises to specify both organizational standards as well as application specific
# validation rules.
#
Validator.ConfigurationFile=validation.properties

# Validators used by ESAPI
Validator.AccountName=^[a-zA-Z0-9]{3,20}$
Validator.SystemCommand=^[a-zA-Z\\-\\/]{1,64}$
Validator.RoleName=^[a-z]{1,20}$

#the word TEST below should be changed to your application 
#name - only relative URL's are supported
Validator.Redirect=^\\/test.*$

# Global HTTP Validation Rules
# Values with Base64 encoded data (e.g. encrypted state) will need at least [a-zA-Z0-9\/+=]
Validator.HTTPScheme=^(http|https)$
Validator.HTTPServerName=^[a-zA-Z0-9_.\\-]*$
Validator.HTTPParameterName=^[a-zA-Z0-9_]{1,32}$
Validator.HTTPParameterValue=^[a-zA-Z0-9.\\-\\/+=@_ ]*$
Validator.HTTPCookieName=^[a-zA-Z0-9\\-_]{1,32}$
Validator.HTTPCookieValue=^[a-zA-Z0-9\\-\\/+=_ ]*$
Validator.HTTPHeaderName=^[a-zA-Z0-9\\-_]{1,32}$
Validator.HTTPHeaderValue=^[a-zA-Z0-9()\\-=\\*\\.\\?;,+\\/:&_ ]*$
Validator.HTTPContextPath=^\\/?[a-zA-Z0-9.\\-\\/_]*$
Validator.HTTPServletPath=^[a-zA-Z0-9.\\-\\/_]*$
Validator.HTTPPath=^[a-zA-Z0-9.\\-_]*$
Validator.HTTPQueryString=^[a-zA-Z0-9()\\-=\\*\\.\\?;,+\\/:&_ %]*$
Validator.HTTPURI=^[a-zA-Z0-9()\\-=\\*\\.\\?;,+\\/:&_ ]*$
Validator.HTTPURL=^.*$
Validator.HTTPJSESSIONID=^[A-Z0-9]{10,30}$

# Validation of file related input
Validator.FileName=^[a-zA-Z0-9!@#$%^&{}\\[\\]()_+\\-=,.~'` ]{1,255}$
Validator.DirectoryName=^[a-zA-Z0-9:/\\\\!@#$%^&{}\\[\\]()_+\\-=,.~'` ]{1,255}$

# Validation of dates. Controls whether or not 'lenient' dates are accepted.
# See DataFormat.setLenient(boolean flag) for further details.
Validator.AcceptLenientDates=false

validation.properties

# The ESAPI validator does many security checks on input, such as canonicalization
# and whitelist validation. Note that all of these validation rules are applied *after*
# canonicalization. Double-encoded characters (even with different encodings involved,
# are never allowed.
#
# To use:
#
# First set up a pattern below. You can choose any name you want, prefixed by the word
# "Validation." For example:
#   Validation.Email=^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\\.[a-zA-Z]{2,4}$
# 
# Then you can validate in your code against the pattern like this:
#     ESAPI.validator().isValidInput("User Email", input, "Email", maxLength, allowNull);
# Where maxLength and allowNull are set for you needs, respectively.
#
# But note, when you use boolean variants of validation functions, you lose critical 
# canonicalization. It is preferable to use the "get" methods (which throw exceptions) and 
# and use the returned user input which is in canonical form. Consider the following:
#  
# try {
#    someObject.setEmail(ESAPI.validator().getValidInput("User Email", input, "Email", maxLength, allowNull));
#

Validator.SafeString=^[.\\p{Alnum}\\p{Space}]{0,1024}$
Validator.Password=^(?=.*[A-Z].*[A-Z])(?=.*[.:,;-_+"'?!@#$&*])(?=.*[0-9].*[0-9])(?=.*[a-z].*[a-z].*[a-z]).{8,20}$
Validator.Digit=^[0-9]{1,20}$
Validator.Email=^[A-Za-z0-9._%'-]+@[A-Za-z0-9.-]+\\.[a-zA-Z]{2,4}$
Validator.IPAddress=^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$
Validator.URL=^(ht|f)tp(s?)\\:\\/\\/[0-9a-zA-Z]([-.\\w]*[0-9a-zA-Z])*(:(0-9)*)*(\\/?)([a-zA-Z0-9\\-\\.\\?\\,\\:\\'\\/\\\\\\+=&amp;%\\$#_]*)?$
Validator.CreditCard=^(\\d{4}[- ]?){3}\\d{4}$
Validator.SSN=^(?!000)([0-6]\\d{2}|7([0-6]\\d|7[012]))([ -]?)(?!00)\\d\\d\\3(?!0000)\\d{4}$

配置过滤器

Java xss 过滤器

XSSFilter

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class XSSFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        chain.doFilter(new XSSRequestWrapper((HttpServletRequest) request), response);
    }

}

XSSRequestWrapper

import org.owasp.esapi.ESAPI;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.util.regex.Pattern;

public class XSSRequestWrapper extends HttpServletRequestWrapper {

    private static Pattern[] patterns = new Pattern[]{
            // Script fragments
            Pattern.compile("<script>(.*?)</script>", Pattern.CASE_INSENSITIVE),
            // src='...'
            Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL),
            Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL),
            // lonely script tags
            Pattern.compile("</script>", Pattern.CASE_INSENSITIVE),
            Pattern.compile("<script(.*?)>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL),
            // eval(...)
            Pattern.compile("eval\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL),
            // expression(...)
            Pattern.compile("expression\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL),
            // javascript:...
            Pattern.compile("javascript:", Pattern.CASE_INSENSITIVE),
            // vbscript:...
            Pattern.compile("vbscript:", Pattern.CASE_INSENSITIVE),
            // onload(...)=...
            Pattern.compile("onload(.*?)=", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL)
    };

    public XSSRequestWrapper(HttpServletRequest servletRequest) {
        super(servletRequest);
    }

    @Override
    public String[] getParameterValues(String parameter) {
        String[] values = super.getParameterValues(parameter);

        if (values == null) {
            return null;
        }

        int count = values.length;
        String[] encodedValues = new String[count];
        for (int i = 0; i < count; i++) {
            encodedValues[i] = stripXSS(values[i]);
        }

        return encodedValues;
    }

    @Override
    public String getParameter(String parameter) {
        String value = super.getParameter(parameter);

        return stripXSS(value);
    }

    @Override
    public String getHeader(String name) {
        String value = super.getHeader(name);
        return stripXSS(value);
    }

    private String stripXSS(String value) {
        if (value != null) {
            // NOTE: It's highly recommended to use the ESAPI library and uncomment the following line to
            // avoid encoded attacks. 注意这里
             value = ESAPI.encoder().canonicalize(value);

            // Avoid null characters
            value = value.replaceAll("", "");

            // Remove all sections that match a pattern
            for (Pattern scriptPattern : patterns){
                value = scriptPattern.matcher(value).replaceAll("");
            }
        }
        return value;
    }
}

web.xml

<filter>
	<filter-name>XSSFilter</filter-name>
	<filter-class>com.xxx.filter.XSSFilter</filter-class>
</filter>
<filter-mapping>
	<filter-name>springCharacterEncoding</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
	<filter-name>XSSFilter</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

测试

这样就基本可以过滤xss的脚本了。注意一定要使用ESAPI规整输入的数据。

参考

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