org.owasp.dependencycheck.utils

Class Checksum

java.lang.Object

org.owasp.dependencycheck.utils.Checksum

public final class Checksum
extends Object

Includes methods to generate the MD5 and SHA1 checksum.

Author:

Jeremy Long

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	getChecksum(String algorithm, File file) Creates the cryptographic checksum of a given file using the specified algorithm.
static String	getHex(byte[] raw) Converts a byte array into a hex string.
static String	getMD5Checksum(File file) Calculates the MD5 checksum of a specified file.
static String	getSHA1Checksum(File file) Calculates the SHA1 checksum of a specified file.

Methods inherited from class java.lang.Object

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

Method Detail

getChecksum

public static byte[] getChecksum(String algorithm,
                 File file)
                          throws NoSuchAlgorithmException,
                                 IOException

Creates the cryptographic checksum of a given file using the specified algorithm.

Parameters:

algorithm - the algorithm to use to calculate the checksum

file - the file to calculate the checksum for

Returns:

the checksum

Throws:

IOException - when the file does not exist

NoSuchAlgorithmException - when an algorithm is specified that does not exist

getMD5Checksum

public static String getMD5Checksum(File file)
                             throws IOException,
                                    NoSuchAlgorithmException

Calculates the MD5 checksum of a specified file.

Parameters:

file - the file to generate the MD5 checksum

Returns:

the hex representation of the MD5 hash

Throws:

IOException - when the file passed in does not exist

NoSuchAlgorithmException - when the MD5 algorithm is not available

getSHA1Checksum

public static String getSHA1Checksum(File file)
                              throws IOException,
                                     NoSuchAlgorithmException

Calculates the SHA1 checksum of a specified file.

Parameters:

file - the file to generate the MD5 checksum

Returns:

the hex representation of the SHA1 hash

Throws:

IOException - when the file passed in does not exist

NoSuchAlgorithmException - when the SHA1 algorithm is not available

getHex

public static String getHex(byte[] raw)

Converts a byte array into a hex string.

This method was copied from http://www.rgagnon.com/javadetails/java-0596.html

Parameters:

raw - a byte array

Returns:

the hex representation of the byte array