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org.owasp.esapi.reference
Class DefaultValidator

java.lang.Object
  extended by org.owasp.esapi.reference.DefaultValidator
All Implemented Interfaces:
Validator
public class DefaultValidator
extends Object
implements Validator

Reference implementation of the Validator interface. This implementation relies on the ESAPI Encoder, Java Pattern (regex), Date, and several other classes to provide basic validation functions. This library has a heavy emphasis on whitelist validation and canonicalization.

Since:
June 1, 2007
Author:
Jeff Williams (jeff.williams .at. aspectsecurity.com) Aspect Security, Jim Manico ([email protected]) Manico.net
See Also:
Validator

Constructor Summary
DefaultValidator()
          Default constructor uses the ESAPI standard encoder for canonicalization.
DefaultValidator(Encoder encoder)
          Construct a new DefaultValidator that will use the specified Encoder for canonicalization.
 
Method Summary
 void addRule(ValidationRule rule)
          Add a validation rule to the registry using the "type name" of the rule as the key.
 void assertValidFileUpload(String context, String directorypath, String filename, File parent, byte[] content, int maxBytes, List<String> allowedExtensions, boolean allowNull)
          Validates the filepath, filename, and content of a file.
 void assertValidFileUpload(String context, String filepath, String filename, File parent, byte[] content, int maxBytes, List<String> allowedExtensions, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileUpload with the supplied errorList to capture ValidationExceptions
 void assertValidHTTPRequestParameterSet(String context, javax.servlet.http.HttpServletRequest request, Set<String> required, Set<String> optional)
          Validates that the parameters in the current request contain all required parameters and only optional ones in addition.
 void assertValidHTTPRequestParameterSet(String context, javax.servlet.http.HttpServletRequest request, Set<String> required, Set<String> optional, ValidationErrorList errors)
          ValidationErrorList variant of assertIsValidHTTPRequestParameterSet Uses current HTTPRequest saved in ESAPI Authenticator
static Validator getInstance()
           
 ValidationRule getRule(String name)
          Get a validation rule from the registry with the "type name" of the rule as the key.
 String getValidCreditCard(String context, String input, boolean allowNull)
          Returns a canonicalized and validated credit card number as a String.
 String getValidCreditCard(String context, String input, boolean allowNull, ValidationErrorList errors)
          Calls getValidCreditCard with the supplied errorList to capture ValidationExceptions
 Date getValidDate(String context, String input, DateFormat format, boolean allowNull)
          Returns a valid date as a Date.
 Date getValidDate(String context, String input, DateFormat format, boolean allowNull, ValidationErrorList errors)
          Calls getValidDate with the supplied errorList to capture ValidationExceptions
 String getValidDirectoryPath(String context, String input, File parent, boolean allowNull)
          Returns a canonicalized and validated directory path as a String, provided that the input maps to an existing directory that is an existing subdirectory (at any level) of the specified parent.
 String getValidDirectoryPath(String context, String input, File parent, boolean allowNull, ValidationErrorList errors)
          Calls getValidDirectoryPath with the supplied errorList to capture ValidationExceptions
 Double getValidDouble(String context, String input, double minValue, double maxValue, boolean allowNull)
          Returns a validated real number as a double.
 Double getValidDouble(String context, String input, double minValue, double maxValue, boolean allowNull, ValidationErrorList errors)
          Calls getValidDouble with the supplied errorList to capture ValidationExceptions
 byte[] getValidFileContent(String context, byte[] input, int maxBytes, boolean allowNull)
          Returns validated file content as a byte array.
 byte[] getValidFileContent(String context, byte[] input, int maxBytes, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileContent with the supplied errorList to capture ValidationExceptions
 String getValidFileName(String context, String input, List<String> allowedExtensions, boolean allowNull)
          Returns a canonicalized and validated file name as a String.
 String getValidFileName(String context, String input, List<String> allowedParameters, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileName with the supplied errorList to capture ValidationExceptions
 String getValidInput(String context, String input, String type, int maxLength, boolean allowNull)
          Validates data received from the browser and returns a safe version.
 String getValidInput(String context, String input, String type, int maxLength, boolean allowNull, boolean canonicalize)
          Validates data received from the browser and returns a safe version.
 String getValidInput(String context, String input, String type, int maxLength, boolean allowNull, boolean canonicalize, ValidationErrorList errors)
          Validates data received from the browser and returns a safe version.
 String getValidInput(String context, String input, String type, int maxLength, boolean allowNull, ValidationErrorList errors)
          Validates data received from the browser and returns a safe version.
 Integer getValidInteger(String context, String input, int minValue, int maxValue, boolean allowNull)
          Returns a validated integer.
 Integer getValidInteger(String context, String input, int minValue, int maxValue, boolean allowNull, ValidationErrorList errors)
          Calls getValidInteger with the supplied errorList to capture ValidationExceptions
 String getValidListItem(String context, String input, List<String> list)
          Returns the list item that exactly matches the canonicalized input.
 String getValidListItem(String context, String input, List<String> list, ValidationErrorList errors)
          ValidationErrorList variant of getValidListItem
 Double getValidNumber(String context, String input, long minValue, long maxValue, boolean allowNull)
          Returns a validated number as a double within the range of minValue to maxValue.
 Double getValidNumber(String context, String input, long minValue, long maxValue, boolean allowNull, ValidationErrorList errors)
          Calls getValidSafeHTML with the supplied errorList to capture ValidationExceptions
 char[] getValidPrintable(String context, char[] input, int maxLength, boolean allowNull)
          Returns canonicalized and validated printable characters as a byte array.
 char[] getValidPrintable(String context, char[] input, int maxLength, boolean allowNull, ValidationErrorList errors)
          ValidationErrorList variant of getValidPrintable
 String getValidPrintable(String context, String input, int maxLength, boolean allowNull)
          Returns canonicalized and validated printable characters as a String.
 String getValidPrintable(String context, String input, int maxLength, boolean allowNull, ValidationErrorList errors)
          ValidationErrorList variant of getValidPrintable
 String getValidRedirectLocation(String context, String input, boolean allowNull)
          Returns a canonicalized and validated redirect location as a String.
 String getValidRedirectLocation(String context, String input, boolean allowNull, ValidationErrorList errors)
          ValidationErrorList variant of getValidRedirectLocation
 String getValidSafeHTML(String context, String input, int maxLength, boolean allowNull)
          Returns canonicalized and validated "safe" HTML that does not contain unwanted scripts in the body, attributes, CSS, URLs, or anywhere else.
 String getValidSafeHTML(String context, String input, int maxLength, boolean allowNull, ValidationErrorList errors)
          Calls getValidSafeHTML with the supplied errorList to capture ValidationExceptions
 boolean isValidCreditCard(String context, String input, boolean allowNull)
          Calls getValidCreditCard and returns true if no exceptions are thrown.
 boolean isValidCreditCard(String context, String input, boolean allowNull, ValidationErrorList errors)
          Calls getValidCreditCard and returns true if no exceptions are thrown.
 boolean isValidDate(String context, String input, DateFormat format, boolean allowNull)
          Calls isValidDate and returns true if no exceptions are thrown.
 boolean isValidDate(String context, String input, DateFormat format, boolean allowNull, ValidationErrorList errors)
          Calls isValidDate and returns true if no exceptions are thrown.
 boolean isValidDirectoryPath(String context, String input, File parent, boolean allowNull)
          Calls getValidDirectoryPath and returns true if no exceptions are thrown.
 boolean isValidDirectoryPath(String context, String input, File parent, boolean allowNull, ValidationErrorList errors)
          Calls getValidDirectoryPath and returns true if no exceptions are thrown.
 boolean isValidDouble(String context, String input, double minValue, double maxValue, boolean allowNull)
          Calls getValidDouble and returns true if no exceptions are thrown.
 boolean isValidDouble(String context, String input, double minValue, double maxValue, boolean allowNull, ValidationErrorList errors)
          Calls getValidDouble and returns true if no exceptions are thrown.
 boolean isValidFileContent(String context, byte[] input, int maxBytes, boolean allowNull)
          Calls getValidFileContent and returns true if no exceptions are thrown.
 boolean isValidFileContent(String context, byte[] input, int maxBytes, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileContent and returns true if no exceptions are thrown.
 boolean isValidFileName(String context, String input, boolean allowNull)
          Calls getValidFileName with the default list of allowedExtensions
 boolean isValidFileName(String context, String input, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileName with the default list of allowedExtensions
 boolean isValidFileName(String context, String input, List<String> allowedExtensions, boolean allowNull)
          Calls getValidFileName and returns true if no exceptions are thrown.
 boolean isValidFileName(String context, String input, List<String> allowedExtensions, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileName and returns true if no exceptions are thrown.
 boolean isValidFileUpload(String context, String directorypath, String filename, File parent, byte[] content, int maxBytes, boolean allowNull)
          Calls getValidFileUpload and returns true if no exceptions are thrown.
 boolean isValidFileUpload(String context, String directorypath, String filename, File parent, byte[] content, int maxBytes, boolean allowNull, ValidationErrorList errors)
          Calls getValidFileUpload and returns true if no exceptions are thrown.
 boolean isValidHTTPRequestParameterSet(String context, javax.servlet.http.HttpServletRequest request, Set<String> requiredNames, Set<String> optionalNames)
          Calls assertValidHTTPRequestParameterSet and returns true if no exceptions are thrown.
 boolean isValidHTTPRequestParameterSet(String context, javax.servlet.http.HttpServletRequest request, Set<String> requiredNames, Set<String> optionalNames, ValidationErrorList errors)
          Calls assertValidHTTPRequestParameterSet and returns true if no exceptions are thrown.
 boolean isValidInput(String context, String input, String type, int maxLength, boolean allowNull)
          Returns true if data received from browser is valid.
 boolean isValidInput(String context, String input, String type, int maxLength, boolean allowNull, boolean canonicalize)
          Calls isValidInput and returns true if no exceptions are thrown.
 boolean isValidInput(String context, String input, String type, int maxLength, boolean allowNull, boolean canonicalize, ValidationErrorList errors)
          Calls isValidInput and returns true if no exceptions are thrown.
 boolean isValidInput(String context, String input, String type, int maxLength, boolean allowNull, ValidationErrorList errors)
          Calls isValidInput and returns true if no exceptions are thrown.
 boolean isValidInteger(String context, String input, int minValue, int maxValue, boolean allowNull)
          Calls getValidInteger and returns true if no exceptions are thrown.
 boolean isValidInteger(String context, String input, int minValue, int maxValue, boolean allowNull, ValidationErrorList errors)
          Calls getValidInteger and returns true if no exceptions are thrown.
 boolean isValidListItem(String context, String input, List<String> list)
          Calls getValidListItem and returns true if no exceptions are thrown.
 boolean isValidListItem(String context, String input, List<String> list, ValidationErrorList errors)
          Calls getValidListItem and returns true if no exceptions are thrown.
 boolean isValidNumber(String context, String input, long minValue, long maxValue, boolean allowNull)
          Calls getValidNumber and returns true if no exceptions are thrown.
 boolean isValidNumber(String context, String input, long minValue, long maxValue, boolean allowNull, ValidationErrorList errors)
          Calls getValidNumber and returns true if no exceptions are thrown.
 boolean isValidPrintable(String context, char[] input, int maxLength, boolean allowNull)
          Calls getValidPrintable and returns true if no exceptions are thrown.
 boolean isValidPrintable(String context, char[] input, int maxLength, boolean allowNull, ValidationErrorList errors)
          Calls getValidPrintable and returns true if no exceptions are thrown.
 boolean isValidPrintable(String context, String input, int maxLength, boolean allowNull)
          Calls getValidPrintable and returns true if no exceptions are thrown.
 boolean isValidPrintable(String context, String input, int maxLength, boolean allowNull, ValidationErrorList errors)
          Calls getValidPrintable and returns true if no exceptions are thrown.
 boolean isValidRedirectLocation(String context, String input, boolean allowNull)
          Returns true if input is a valid redirect location.
 boolean isValidRedirectLocation(String context, String input, boolean allowNull, ValidationErrorList errors)
          Returns true if input is a valid redirect location.
 boolean isValidSafeHTML(String context, String input, int maxLength, boolean allowNull)
          Calls getValidSafeHTML and returns true if no exceptions are thrown.
 boolean isValidSafeHTML(String context, String input, int maxLength, boolean allowNull, ValidationErrorList errors)
          Calls getValidSafeHTML and returns true if no exceptions are thrown.
 String safeReadLine(InputStream in, int max)
          Reads from an input stream until end-of-line or a maximum number of characters.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DefaultValidator

public DefaultValidator()
Default constructor uses the ESAPI standard encoder for canonicalization.

DefaultValidator

public DefaultValidator(Encoder encoder)
Construct a new DefaultValidator that will use the specified Encoder for canonicalization.

Parameters:
encoder -
Method Detail

getInstance

public static Validator getInstance()

addRule

public void addRule(ValidationRule rule)
Add a validation rule to the registry using the "type name" of the rule as the key.

Specified by:
addRule in interface Validator

getRule

public ValidationRule getRule(String name)
Get a validation rule from the registry with the "type name" of the rule as the key.

Specified by:
getRule in interface Validator

isValidInput

public boolean isValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull)
                     throws IntrusionException
Returns true if data received from browser is valid. Double encoding is treated as an attack. The default encoder supports html encoding, URL encoding, and javascript escaping. Input is canonicalized by default before validation.

Specified by:
isValidInput in interface Validator
Parameters:
context - A descriptive name for the field to validate. This is used for error facing validation messages and element identification.
input - The actual user input data to validate.
type - The regular expression name while maps to the actual regular expression from "ESAPI.properties".
maxLength - The maximum post-canonicalized String length allowed.
allowNull - If allowNull is true then a input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
The canonicalized user input.
Throws:
IntrusionException

isValidInput

public boolean isValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull,
                            ValidationErrorList errors)
                     throws IntrusionException
Description copied from interface: Validator
Calls isValidInput and returns true if no exceptions are thrown.

Specified by:
isValidInput in interface Validator
Throws:
IntrusionException

isValidInput

public boolean isValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull,
                            boolean canonicalize)
                     throws IntrusionException
Description copied from interface: Validator
Calls isValidInput and returns true if no exceptions are thrown.

Specified by:
isValidInput in interface Validator
Throws:
IntrusionException

isValidInput

public boolean isValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull,
                            boolean canonicalize,
                            ValidationErrorList errors)
                     throws IntrusionException
Description copied from interface: Validator
Calls isValidInput and returns true if no exceptions are thrown.

Specified by:
isValidInput in interface Validator
Throws:
IntrusionException

getValidInput

public String getValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull)
                     throws ValidationException
Validates data received from the browser and returns a safe version. Double encoding is treated as an attack. The default encoder supports html encoding, URL encoding, and javascript escaping. Input is canonicalized by default before validation.

Specified by:
getValidInput in interface Validator
Parameters:
context - A descriptive name for the field to validate. This is used for error facing validation messages and element identification.
input - The actual user input data to validate.
type - The regular expression name which maps to the actual regular expression from "ESAPI.properties".
maxLength - The maximum post-canonicalized String length allowed.
allowNull - If allowNull is true then a input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
The canonicalized user input.
Throws:
ValidationException
IntrusionException

getValidInput

public String getValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull,
                            boolean canonicalize)
                     throws ValidationException
Validates data received from the browser and returns a safe version. Only URL encoding is supported. Double encoding is treated as an attack.

Specified by:
getValidInput in interface Validator
Parameters:
context - A descriptive name for the field to validate. This is used for error facing validation messages and element identification.
input - The actual user input data to validate.
type - The regular expression name which maps to the actual regular expression in the ESAPI validation configuration file
maxLength - The maximum String length allowed. If input is canonicalized per the canonicalize argument, then maxLength must be verified after canonicalization
allowNull - If allowNull is true then a input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
canonicalize - If canonicalize is true then input will be canonicalized before validation
Returns:
The user input, may be canonicalized if canonicalize argument is true
Throws:
ValidationException
IntrusionException

getValidInput

public String getValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull,
                            ValidationErrorList errors)
                     throws IntrusionException
Validates data received from the browser and returns a safe version. Only URL encoding is supported. Double encoding is treated as an attack. Input is canonicalized by default before validation.

Specified by:
getValidInput in interface Validator
Parameters:
context - A descriptive name for the field to validate. This is used for error facing validation messages and element identification.
input - The actual user input data to validate.
type - The regular expression name while maps to the actual regular expression from "ESAPI.properties".
maxLength - The maximum String length allowed. If input is canonicalized per the canonicalize argument, then maxLength must be verified after canonicalization
allowNull - If allowNull is true then a input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
errors - If ValidationException is thrown, then add to error list instead of throwing out to caller
Returns:
The canonicalized user input.
Throws:
IntrusionException

getValidInput

public String getValidInput(String context,
                            String input,
                            String type,
                            int maxLength,
                            boolean allowNull,
                            boolean canonicalize,
                            ValidationErrorList errors)
                     throws IntrusionException
Validates data received from the browser and returns a safe version. Only URL encoding is supported. Double encoding is treated as an attack.

Specified by:
getValidInput in interface Validator
Parameters:
context - A descriptive name for the field to validate. This is used for error facing validation messages and element identification.
input - The actual user input data to validate.
type - The regular expression name while maps to the actual regular expression from "ESAPI.properties".
maxLength - The maximum post-canonicalized String length allowed
allowNull - If allowNull is true then a input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
canonicalize - If canonicalize is true then input will be canonicalized before validation
errors - If ValidationException is thrown, then add to error list instead of throwing out to caller
Returns:
The user input, may be canonicalized if canonicalize argument is true
Throws:
IntrusionException

isValidDate

public boolean isValidDate(String context,
                           String input,
                           DateFormat format,
                           boolean allowNull)
                    throws IntrusionException
Calls isValidDate and returns true if no exceptions are thrown.

Specified by:
isValidDate in interface Validator
Throws:
IntrusionException

isValidDate

public boolean isValidDate(String context,
                           String input,
                           DateFormat format,
                           boolean allowNull,
                           ValidationErrorList errors)
                    throws IntrusionException
Calls isValidDate and returns true if no exceptions are thrown.

Specified by:
isValidDate in interface Validator
Throws:
IntrusionException

getValidDate

public Date getValidDate(String context,
                         String input,
                         DateFormat format,
                         boolean allowNull)
                  throws ValidationException,
                         IntrusionException
Returns a valid date as a Date. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidDate in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual user input data to validate.
format - Required formatting of date inputted.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A valid date as a Date
Throws:
ValidationException
IntrusionException

getValidDate

public Date getValidDate(String context,
                         String input,
                         DateFormat format,
                         boolean allowNull,
                         ValidationErrorList errors)
                  throws IntrusionException
Calls getValidDate with the supplied errorList to capture ValidationExceptions

Specified by:
getValidDate in interface Validator
Throws:
IntrusionException

isValidSafeHTML

public boolean isValidSafeHTML(String context,
                               String input,
                               int maxLength,
                               boolean allowNull)
                        throws IntrusionException
Calls getValidSafeHTML and returns true if no exceptions are thrown.

Specified by:
isValidSafeHTML in interface Validator
Throws:
IntrusionException

isValidSafeHTML

public boolean isValidSafeHTML(String context,
                               String input,
                               int maxLength,
                               boolean allowNull,
                               ValidationErrorList errors)
                        throws IntrusionException
Calls getValidSafeHTML and returns true if no exceptions are thrown.

Specified by:
isValidSafeHTML in interface Validator
Throws:
IntrusionException

getValidSafeHTML

public String getValidSafeHTML(String context,
                               String input,
                               int maxLength,
                               boolean allowNull)
                        throws ValidationException,
                               IntrusionException
Returns canonicalized and validated "safe" HTML that does not contain unwanted scripts in the body, attributes, CSS, URLs, or anywhere else. Implementors should reference the OWASP AntiSamy project for ideas on how to do HTML validation in a whitelist way, as this is an extremely difficult problem. This implementation relies on the OWASP AntiSamy project.

Specified by:
getValidSafeHTML in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual user input data to validate.
maxLength - The maximum String length allowed.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
Valid safe HTML
Throws:
ValidationException
IntrusionException

getValidSafeHTML

public String getValidSafeHTML(String context,
                               String input,
                               int maxLength,
                               boolean allowNull,
                               ValidationErrorList errors)
                        throws IntrusionException
Calls getValidSafeHTML with the supplied errorList to capture ValidationExceptions

Specified by:
getValidSafeHTML in interface Validator
Throws:
IntrusionException

isValidCreditCard

public boolean isValidCreditCard(String context,
                                 String input,
                                 boolean allowNull)
                          throws IntrusionException
Calls getValidCreditCard and returns true if no exceptions are thrown.

Specified by:
isValidCreditCard in interface Validator
Throws:
IntrusionException

isValidCreditCard

public boolean isValidCreditCard(String context,
                                 String input,
                                 boolean allowNull,
                                 ValidationErrorList errors)
                          throws IntrusionException
Calls getValidCreditCard and returns true if no exceptions are thrown.

Specified by:
isValidCreditCard in interface Validator
Throws:
IntrusionException

getValidCreditCard

public String getValidCreditCard(String context,
                                 String input,
                                 boolean allowNull)
                          throws ValidationException,
                                 IntrusionException
Returns a canonicalized and validated credit card number as a String. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidCreditCard in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual user input data to validate.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A valid credit card number
Throws:
ValidationException
IntrusionException

getValidCreditCard

public String getValidCreditCard(String context,
                                 String input,
                                 boolean allowNull,
                                 ValidationErrorList errors)
                          throws IntrusionException
Calls getValidCreditCard with the supplied errorList to capture ValidationExceptions

Specified by:
getValidCreditCard in interface Validator
Throws:
IntrusionException

isValidDirectoryPath

public boolean isValidDirectoryPath(String context,
                                    String input,
                                    File parent,
                                    boolean allowNull)
                             throws IntrusionException
Calls getValidDirectoryPath and returns true if no exceptions are thrown.

Note: On platforms that support symlinks, this function will fail canonicalization if directorypath is a symlink. For example, on MacOS X, /etc is actually /private/etc. If you mean to use /etc, use its real path (/private/etc), not the symlink (/etc).

Specified by:
isValidDirectoryPath in interface Validator
Throws:
IntrusionException

isValidDirectoryPath

public boolean isValidDirectoryPath(String context,
                                    String input,
                                    File parent,
                                    boolean allowNull,
                                    ValidationErrorList errors)
                             throws IntrusionException
Calls getValidDirectoryPath and returns true if no exceptions are thrown.

Note: On platforms that support symlinks, this function will fail canonicalization if directorypath is a symlink. For example, on MacOS X, /etc is actually /private/etc. If you mean to use /etc, use its real path (/private/etc), not the symlink (/etc).

Specified by:
isValidDirectoryPath in interface Validator
Throws:
IntrusionException

getValidDirectoryPath

public String getValidDirectoryPath(String context,
                                    String input,
                                    File parent,
                                    boolean allowNull)
                             throws ValidationException,
                                    IntrusionException
Returns a canonicalized and validated directory path as a String, provided that the input maps to an existing directory that is an existing subdirectory (at any level) of the specified parent. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException. Instead of throwing a ValidationException on error, this variant will store the exception inside of the ValidationErrorList.

Specified by:
getValidDirectoryPath in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual input data to validate.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A valid directory path
Throws:
ValidationException
IntrusionException

getValidDirectoryPath

public String getValidDirectoryPath(String context,
                                    String input,
                                    File parent,
                                    boolean allowNull,
                                    ValidationErrorList errors)
                             throws IntrusionException
Calls getValidDirectoryPath with the supplied errorList to capture ValidationExceptions

Specified by:
getValidDirectoryPath in interface Validator
Throws:
IntrusionException

isValidFileName

public boolean isValidFileName(String context,
                               String input,
                               boolean allowNull)
                        throws IntrusionException
Calls getValidFileName with the default list of allowedExtensions

Specified by:
isValidFileName in interface Validator
Throws:
IntrusionException

isValidFileName

public boolean isValidFileName(String context,
                               String input,
                               boolean allowNull,
                               ValidationErrorList errors)
                        throws IntrusionException
Calls getValidFileName with the default list of allowedExtensions

Specified by:
isValidFileName in interface Validator
Throws:
IntrusionException

isValidFileName

public boolean isValidFileName(String context,
                               String input,
                               List<String> allowedExtensions,
                               boolean allowNull)
                        throws IntrusionException
Calls getValidFileName and returns true if no exceptions are thrown.

Specified by:
isValidFileName in interface Validator
Throws:
IntrusionException

isValidFileName

public boolean isValidFileName(String context,
                               String input,
                               List<String> allowedExtensions,
                               boolean allowNull,
                               ValidationErrorList errors)
                        throws IntrusionException
Calls getValidFileName and returns true if no exceptions are thrown.

Specified by:
isValidFileName in interface Validator
Throws:
IntrusionException

getValidFileName

public String getValidFileName(String context,
                               String input,
                               List<String> allowedExtensions,
                               boolean allowNull)
                        throws ValidationException,
                               IntrusionException
Returns a canonicalized and validated file name as a String. Implementors should check for allowed file extensions here, as well as allowed file name characters, as declared in "ESAPI.properties". Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidFileName in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual input data to validate.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A valid file name
Throws:
ValidationException
IntrusionException

getValidFileName

public String getValidFileName(String context,
                               String input,
                               List<String> allowedParameters,
                               boolean allowNull,
                               ValidationErrorList errors)
                        throws IntrusionException
Calls getValidFileName with the supplied errorList to capture ValidationExceptions

Specified by:
getValidFileName in interface Validator
Throws:
IntrusionException

isValidNumber

public boolean isValidNumber(String context,
                             String input,
                             long minValue,
                             long maxValue,
                             boolean allowNull)
                      throws IntrusionException
Calls getValidNumber and returns true if no exceptions are thrown.

Specified by:
isValidNumber in interface Validator
Throws:
IntrusionException

isValidNumber

public boolean isValidNumber(String context,
                             String input,
                             long minValue,
                             long maxValue,
                             boolean allowNull,
                             ValidationErrorList errors)
                      throws IntrusionException
Calls getValidNumber and returns true if no exceptions are thrown.

Specified by:
isValidNumber in interface Validator
Throws:
IntrusionException

getValidNumber

public Double getValidNumber(String context,
                             String input,
                             long minValue,
                             long maxValue,
                             boolean allowNull)
                      throws ValidationException,
                             IntrusionException
Returns a validated number as a double within the range of minValue to maxValue. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidNumber in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual input data to validate.
minValue - Lowest legal value for input.
maxValue - Highest legal value for input.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A validated number as a double.
Throws:
ValidationException
IntrusionException

getValidNumber

public Double getValidNumber(String context,
                             String input,
                             long minValue,
                             long maxValue,
                             boolean allowNull,
                             ValidationErrorList errors)
                      throws IntrusionException
Calls getValidSafeHTML with the supplied errorList to capture ValidationExceptions

Specified by:
getValidNumber in interface Validator
Throws:
IntrusionException

isValidDouble

public boolean isValidDouble(String context,
                             String input,
                             double minValue,
                             double maxValue,
                             boolean allowNull)
                      throws IntrusionException
Calls getValidDouble and returns true if no exceptions are thrown.

Specified by:
isValidDouble in interface Validator
Throws:
IntrusionException

isValidDouble

public boolean isValidDouble(String context,
                             String input,
                             double minValue,
                             double maxValue,
                             boolean allowNull,
                             ValidationErrorList errors)
                      throws IntrusionException
Calls getValidDouble and returns true if no exceptions are thrown.

Specified by:
isValidDouble in interface Validator
Throws:
IntrusionException

getValidDouble

public Double getValidDouble(String context,
                             String input,
                             double minValue,
                             double maxValue,
                             boolean allowNull)
                      throws ValidationException,
                             IntrusionException
Returns a validated real number as a double. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidDouble in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual input data to validate.
minValue - Lowest legal value for input.
maxValue - Highest legal value for input.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A validated real number as a double.
Throws:
ValidationException
IntrusionException

getValidDouble

public Double getValidDouble(String context,
                             String input,
                             double minValue,
                             double maxValue,
                             boolean allowNull,
                             ValidationErrorList errors)
                      throws IntrusionException
Calls getValidDouble with the supplied errorList to capture ValidationExceptions

Specified by:
getValidDouble in interface Validator
Throws:
IntrusionException

isValidInteger

public boolean isValidInteger(String context,
                              String input,
                              int minValue,
                              int maxValue,
                              boolean allowNull)
                       throws IntrusionException
Calls getValidInteger and returns true if no exceptions are thrown.

Specified by:
isValidInteger in interface Validator
Throws:
IntrusionException

isValidInteger

public boolean isValidInteger(String context,
                              String input,
                              int minValue,
                              int maxValue,
                              boolean allowNull,
                              ValidationErrorList errors)
                       throws IntrusionException
Calls getValidInteger and returns true if no exceptions are thrown.

Specified by:
isValidInteger in interface Validator
Throws:
IntrusionException

getValidInteger

public Integer getValidInteger(String context,
                               String input,
                               int minValue,
                               int maxValue,
                               boolean allowNull)
                        throws ValidationException,
                               IntrusionException
Returns a validated integer. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidInteger in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual input data to validate.
minValue - Lowest legal value for input.
maxValue - Highest legal value for input.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A validated number as an integer.
Throws:
ValidationException
IntrusionException

getValidInteger

public Integer getValidInteger(String context,
                               String input,
                               int minValue,
                               int maxValue,
                               boolean allowNull,
                               ValidationErrorList errors)
                        throws IntrusionException
Calls getValidInteger with the supplied errorList to capture ValidationExceptions

Specified by:
getValidInteger in interface Validator
Throws:
IntrusionException

isValidFileContent

public boolean isValidFileContent(String context,
                                  byte[] input,
                                  int maxBytes,
                                  boolean allowNull)
                           throws IntrusionException
Calls getValidFileContent and returns true if no exceptions are thrown.

Specified by:
isValidFileContent in interface Validator
Throws:
IntrusionException

isValidFileContent

public boolean isValidFileContent(String context,
                                  byte[] input,
                                  int maxBytes,
                                  boolean allowNull,
                                  ValidationErrorList errors)
                           throws IntrusionException
Calls getValidFileContent and returns true if no exceptions are thrown.

Specified by:
isValidFileContent in interface Validator
Throws:
IntrusionException

getValidFileContent

public byte[] getValidFileContent(String context,
                                  byte[] input,
                                  int maxBytes,
                                  boolean allowNull)
                           throws ValidationException,
                                  IntrusionException
Returns validated file content as a byte array. This is a good place to check for max file size, allowed character sets, and do virus scans. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidFileContent in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The actual input data to validate.
maxBytes - The maximum number of bytes allowed in a legal file.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A byte array containing valid file content.
Throws:
ValidationException
IntrusionException

getValidFileContent

public byte[] getValidFileContent(String context,
                                  byte[] input,
                                  int maxBytes,
                                  boolean allowNull,
                                  ValidationErrorList errors)
                           throws IntrusionException
Calls getValidFileContent with the supplied errorList to capture ValidationExceptions

Specified by:
getValidFileContent in interface Validator
Throws:
IntrusionException

isValidFileUpload

public boolean isValidFileUpload(String context,
                                 String directorypath,
                                 String filename,
                                 File parent,
                                 byte[] content,
                                 int maxBytes,
                                 boolean allowNull)
                          throws IntrusionException
Calls getValidFileUpload and returns true if no exceptions are thrown.

Note: On platforms that support symlinks, this function will fail canonicalization if directorypath is a symlink. For example, on MacOS X, /etc is actually /private/etc. If you mean to use /etc, use its real path (/private/etc), not the symlink (/etc).

Specified by:
isValidFileUpload in interface Validator
Throws:
IntrusionException

isValidFileUpload

public boolean isValidFileUpload(String context,
                                 String directorypath,
                                 String filename,
                                 File parent,
                                 byte[] content,
                                 int maxBytes,
                                 boolean allowNull,
                                 ValidationErrorList errors)
                          throws IntrusionException
Calls getValidFileUpload and returns true if no exceptions are thrown.

Note: On platforms that support symlinks, this function will fail canonicalization if directorypath is a symlink. For example, on MacOS X, /etc is actually /private/etc. If you mean to use /etc, use its real path (/private/etc), not the symlink (/etc).

Specified by:
isValidFileUpload in interface Validator
Throws:
IntrusionException

assertValidFileUpload

public void assertValidFileUpload(String context,
                                  String directorypath,
                                  String filename,
                                  File parent,
                                  byte[] content,
                                  int maxBytes,
                                  List<String> allowedExtensions,
                                  boolean allowNull)
                           throws ValidationException,
                                  IntrusionException
Validates the filepath, filename, and content of a file. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
assertValidFileUpload in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
directorypath - The file path of the uploaded file.
filename - The filename of the uploaded file
content - A byte array containing the content of the uploaded file.
maxBytes - The max number of bytes allowed for a legal file upload.
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Throws:
ValidationException
IntrusionException

assertValidFileUpload

public void assertValidFileUpload(String context,
                                  String filepath,
                                  String filename,
                                  File parent,
                                  byte[] content,
                                  int maxBytes,
                                  List<String> allowedExtensions,
                                  boolean allowNull,
                                  ValidationErrorList errors)
                           throws IntrusionException
Calls getValidFileUpload with the supplied errorList to capture ValidationExceptions

Specified by:
assertValidFileUpload in interface Validator
Throws:
IntrusionException

isValidListItem

public boolean isValidListItem(String context,
                               String input,
                               List<String> list)
Calls getValidListItem and returns true if no exceptions are thrown. Returns true if input is a valid list item.

Specified by:
isValidListItem in interface Validator

isValidListItem

public boolean isValidListItem(String context,
                               String input,
                               List<String> list,
                               ValidationErrorList errors)
Calls getValidListItem and returns true if no exceptions are thrown. Returns true if input is a valid list item.

Specified by:
isValidListItem in interface Validator

getValidListItem

public String getValidListItem(String context,
                               String input,
                               List<String> list)
                        throws ValidationException,
                               IntrusionException
Returns the list item that exactly matches the canonicalized input. Invalid or non-matching input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidListItem in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - The value to search 'list' for.
list - The list to search for 'input'.
Returns:
The list item that exactly matches the canonicalized input.
Throws:
ValidationException
IntrusionException

getValidListItem

public String getValidListItem(String context,
                               String input,
                               List<String> list,
                               ValidationErrorList errors)
                        throws IntrusionException
ValidationErrorList variant of getValidListItem

Specified by:
getValidListItem in interface Validator
Parameters:
errors -
Throws:
IntrusionException

isValidHTTPRequestParameterSet

public boolean isValidHTTPRequestParameterSet(String context,
                                              javax.servlet.http.HttpServletRequest request,
                                              Set<String> requiredNames,
                                              Set<String> optionalNames)
Calls assertValidHTTPRequestParameterSet and returns true if no exceptions are thrown.

Specified by:
isValidHTTPRequestParameterSet in interface Validator

isValidHTTPRequestParameterSet

public boolean isValidHTTPRequestParameterSet(String context,
                                              javax.servlet.http.HttpServletRequest request,
                                              Set<String> requiredNames,
                                              Set<String> optionalNames,
                                              ValidationErrorList errors)
Calls assertValidHTTPRequestParameterSet and returns true if no exceptions are thrown.

Specified by:
isValidHTTPRequestParameterSet in interface Validator

assertValidHTTPRequestParameterSet

public void assertValidHTTPRequestParameterSet(String context,
                                               javax.servlet.http.HttpServletRequest request,
                                               Set<String> required,
                                               Set<String> optional)
                                        throws ValidationException,
                                               IntrusionException
Validates that the parameters in the current request contain all required parameters and only optional ones in addition. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException. Uses current HTTPRequest

Specified by:
assertValidHTTPRequestParameterSet in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
required - parameters that are required to be in HTTP request
optional - additional parameters that may be in HTTP request
Throws:
ValidationException
IntrusionException

assertValidHTTPRequestParameterSet

public void assertValidHTTPRequestParameterSet(String context,
                                               javax.servlet.http.HttpServletRequest request,
                                               Set<String> required,
                                               Set<String> optional,
                                               ValidationErrorList errors)
                                        throws IntrusionException
ValidationErrorList variant of assertIsValidHTTPRequestParameterSet Uses current HTTPRequest saved in ESAPI Authenticator

Specified by:
assertValidHTTPRequestParameterSet in interface Validator
Parameters:
errors -
Throws:
IntrusionException

isValidPrintable

public boolean isValidPrintable(String context,
                                char[] input,
                                int maxLength,
                                boolean allowNull)
                         throws IntrusionException
Calls getValidPrintable and returns true if no exceptions are thrown. Checks that all bytes are valid ASCII characters (between 33 and 126 inclusive). This implementation does no decoding. http://en.wikipedia.org/wiki/ASCII.

Specified by:
isValidPrintable in interface Validator
Throws:
IntrusionException

isValidPrintable

public boolean isValidPrintable(String context,
                                char[] input,
                                int maxLength,
                                boolean allowNull,
                                ValidationErrorList errors)
                         throws IntrusionException
Calls getValidPrintable and returns true if no exceptions are thrown. Checks that all bytes are valid ASCII characters (between 33 and 126 inclusive). This implementation does no decoding. http://en.wikipedia.org/wiki/ASCII.

Specified by:
isValidPrintable in interface Validator
Throws:
IntrusionException

getValidPrintable

public char[] getValidPrintable(String context,
                                char[] input,
                                int maxLength,
                                boolean allowNull)
                         throws ValidationException,
                                IntrusionException
Returns canonicalized and validated printable characters as a byte array. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidPrintable in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - data to be returned as valid and printable
maxLength - Maximum number of bytes stored in 'input'
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
a byte array containing only printable characters, made up of data from 'input'
Throws:
IntrusionException
ValidationException

getValidPrintable

public char[] getValidPrintable(String context,
                                char[] input,
                                int maxLength,
                                boolean allowNull,
                                ValidationErrorList errors)
                         throws IntrusionException
ValidationErrorList variant of getValidPrintable

Specified by:
getValidPrintable in interface Validator
Parameters:
errors -
Throws:
IntrusionException

isValidPrintable

public boolean isValidPrintable(String context,
                                String input,
                                int maxLength,
                                boolean allowNull)
                         throws IntrusionException
Calls getValidPrintable and returns true if no exceptions are thrown. Returns true if input is valid printable ASCII characters (32-126).

Specified by:
isValidPrintable in interface Validator
Throws:
IntrusionException

isValidPrintable

public boolean isValidPrintable(String context,
                                String input,
                                int maxLength,
                                boolean allowNull,
                                ValidationErrorList errors)
                         throws IntrusionException
Calls getValidPrintable and returns true if no exceptions are thrown. Returns true if input is valid printable ASCII characters (32-126).

Specified by:
isValidPrintable in interface Validator
Throws:
IntrusionException

getValidPrintable

public String getValidPrintable(String context,
                                String input,
                                int maxLength,
                                boolean allowNull)
                         throws ValidationException,
                                IntrusionException
Returns canonicalized and validated printable characters as a String. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidPrintable in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - data to be returned as valid and printable
maxLength - Maximum number of bytes stored in 'input' after canonicalization
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
a String containing only printable characters, made up of data from 'input'
Throws:
IntrusionException
ValidationException

getValidPrintable

public String getValidPrintable(String context,
                                String input,
                                int maxLength,
                                boolean allowNull,
                                ValidationErrorList errors)
                         throws IntrusionException
ValidationErrorList variant of getValidPrintable

Specified by:
getValidPrintable in interface Validator
Parameters:
errors -
Throws:
IntrusionException

isValidRedirectLocation

public boolean isValidRedirectLocation(String context,
                                       String input,
                                       boolean allowNull)
                                throws IntrusionException
Returns true if input is a valid redirect location.

Specified by:
isValidRedirectLocation in interface Validator
Throws:
IntrusionException

isValidRedirectLocation

public boolean isValidRedirectLocation(String context,
                                       String input,
                                       boolean allowNull,
                                       ValidationErrorList errors)
                                throws IntrusionException
Returns true if input is a valid redirect location.

Specified by:
isValidRedirectLocation in interface Validator
Throws:
IntrusionException

getValidRedirectLocation

public String getValidRedirectLocation(String context,
                                       String input,
                                       boolean allowNull)
                                throws ValidationException,
                                       IntrusionException
Returns a canonicalized and validated redirect location as a String. Invalid input will generate a descriptive ValidationException, and input that is clearly an attack will generate a descriptive IntrusionException.

Specified by:
getValidRedirectLocation in interface Validator
Parameters:
context - A descriptive name of the parameter that you are validating (e.g., LoginPage_UsernameField). This value is used by any logging or error handling that is done with respect to the value passed in.
input - redirect location to be returned as valid, according to encoding rules set in "ESAPI.properties"
allowNull - If allowNull is true then an input that is NULL or an empty string will be legal. If allowNull is false then NULL or an empty String will throw a ValidationException.
Returns:
A canonicalized and validated redirect location, as defined in "ESAPI.properties"
Throws:
ValidationException
IntrusionException

getValidRedirectLocation

public String getValidRedirectLocation(String context,
                                       String input,
                                       boolean allowNull,
                                       ValidationErrorList errors)
                                throws IntrusionException
ValidationErrorList variant of getValidRedirectLocation

Specified by:
getValidRedirectLocation in interface Validator
Parameters:
errors -
Throws:
IntrusionException

safeReadLine

public String safeReadLine(InputStream in,
                           int max)
                    throws ValidationException
Reads from an input stream until end-of-line or a maximum number of characters. This method protects against the inherent denial of service attack in reading until the end of a line. If an attacker doesn't ever send a newline character, then a normal input stream reader will read until all memory is exhausted and the platform throws an OutOfMemoryError and probably terminates. This implementation reads until a newline or the specified number of characters.

Specified by:
safeReadLine in interface Validator
Parameters:
in -
max -
Returns:
a String containing the current line of inputStream
Throws:
ValidationException
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