Package com.jgcomptech.tools

Class SecurityTools.FileHashes

java.lang.Object

com.jgcomptech.tools.SecurityTools.FileHashes

Enclosing class:

SecurityTools

public static final class SecurityTools.FileHashes
extends java.lang.Object

Contains methods dealing with hashing files.

Method Summary

Modifier and Type	Method	Description
static java.lang.String	getFileHash(SecurityTools.HashType type, java.lang.String filename)	Read the file and calculate the checksum.
static java.lang.String	getFileHash(SecurityTools.HashType type, java.lang.String filename, boolean toUpperCase)	Read the file and calculate the checksum.
static byte[]	readFromFile(java.lang.String fileName)	Read saved hash file to byte array.
static void	saveToFile(java.lang.String hash, java.lang.String fileName)	Save generated hash to the specified file.
static void	saveToFile(java.security.Key key, java.lang.String fileName)	Save generated Key to the specified file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getFileHash

public static java.lang.String getFileHash(SecurityTools.HashType type,
                                           java.lang.String filename)
                                    throws java.io.IOException

Read the file and calculate the checksum.

Parameters:

type - the hash type to use

filename - the file to read

Returns:

the hex representation of the hash using uppercase chars

Throws:

java.io.FileNotFoundException - if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading

java.io.IOException - if an I/O error occurs

getFileHash

public static java.lang.String getFileHash(SecurityTools.HashType type,
                                           java.lang.String filename,
                                           boolean toUpperCase)
                                    throws java.io.IOException

Read the file and calculate the checksum.

Parameters:

type - the hash type to use

filename - the file to read

toUpperCase - if true returned hash will be all uppercase

Returns:

the hex representation of the hash

Throws:

java.io.FileNotFoundException - if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading

java.io.IOException - if an I/O error occurs

saveToFile

public static void saveToFile(java.lang.String hash,
                              java.lang.String fileName)
                       throws java.io.IOException

Save generated hash to the specified file.

Parameters:

fileName - Filename to be saved to

hash - Hash to be saved

Throws:

java.io.FileNotFoundException - if the file is a directory rather than a regular file, or for some other reason cannot be opened for writing

java.io.IOException - if an I/O error occurs

saveToFile

public static void saveToFile(java.security.Key key,
                              java.lang.String fileName)
                       throws java.io.IOException

Save generated Key to the specified file.

Parameters:

fileName - Filename to be saved to

key - Key to be saved

Throws:

java.io.FileNotFoundException - if the file is a directory rather than a regular file, or for some other reason cannot be opened for writing

java.io.IOException - if an I/O error occurs

readFromFile

public static byte[] readFromFile(java.lang.String fileName)
                           throws java.io.IOException

Read saved hash file to byte array.

Parameters:

fileName - Filename to be read from

Returns:

File contents as string

Throws:

java.io.FileNotFoundException - if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading

java.io.IOException - if an I/O error occurs