eu.planets_project.services.utils
Class Checksums

java.lang.Object
  eu.planets_project.services.utils.Checksums

public class Checksums
extends Object

Checksums util class.

Constructor Summary

Checksums()

Method Summary

static byte[]	digest(String algorithm, byte[] in) Calculate the checksum of a byte array.
static byte[]	digest(String algorithm, File in) Calculate the checksum of a given File.
static byte[]	digest(String algorithm, InputStream in) Calculate the checksum of a given InputStream.
static byte[]	digest(String algorithm, String in) Calculate the checksum of a given String.
static byte[]	md5(File in) Calculate the MD5 checksum of a File.
static byte[]	md5(InputStream in) Calculate the MD5 checksum of a given stream.
static byte[]	md5(String in) Calculate the MD5 checksum of a string.
static byte[]	sha1(File in) Calculate the SHA-1 checksum of a File.
static byte[]	sha1(InputStream in) Calculate the SHA-1 checksum of a given stream.
static byte[]	sha1(String in) Calculate the SHA-1 checksum of a string.

Methods inherited from class java.lang.Object

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

Constructor Detail

Checksums

public Checksums()

Method Detail

digest

public static byte[] digest(String algorithm,
                            InputStream in)
                     throws IOException,
                            NoSuchAlgorithmException

Calculate the checksum of a given InputStream. The stream is guaranteed to be closed after ended operation.

Parameters:

algorithm - the algorithm to use to compute the digest. Possbile values can be found in the Java CryptoSpec.

in - the stream to digest

Returns:

the computed digest in a byte array

Throws:

IOException - if there is an error reading the input stream

NoSuchAlgorithmException - if the algorithm requested in algorithm isn't known to the jvm.

digest

public static byte[] digest(String algorithm,
                            byte[] in)
                     throws NoSuchAlgorithmException

Calculate the checksum of a byte array. The array will be read in one chunk.

Parameters:

algorithm - the algorithm to use to compute the digest. Possbile values can be found in the Java CryptoSpec.

in - array the byte array to compute the digest of

Returns:

the computed digest in a byte array

Throws:

NoSuchAlgorithmException - if the algorithm requested in algorithm isn't known to the jvm.

digest

public static byte[] digest(String algorithm,
                            String in)
                     throws NoSuchAlgorithmException

Calculate the checksum of a given String.

Throws:

NoSuchAlgorithmException

See Also:

digest(String, java.io.InputStream)

digest

public static byte[] digest(String algorithm,
                            File in)
                     throws NoSuchAlgorithmException,
                            IOException

Calculate the checksum of a given File.

Throws:

NoSuchAlgorithmException

IOException

See Also:

digest(String, java.io.InputStream)

sha1

public static byte[] sha1(InputStream in)
                   throws IOException

Calculate the SHA-1 checksum of a given stream.

Throws:

IOException - if there is an error reading the stream

sha1

public static byte[] sha1(String in)

Calculate the SHA-1 checksum of a string.

Throws:

DigestException - if the JVM doesn't know the SHA-1 algorithm

sha1

public static byte[] sha1(File in)
                   throws IOException

Calculate the SHA-1 checksum of a File.

Throws:

IOException - if there is an error reading the file

DigestException - if the JVM doesn't know the SHA-1 algorithm

md5

public static byte[] md5(InputStream in)
                  throws IOException

Calculate the MD5 checksum of a given stream.

Throws:

IOException - if there is an error reading the stream

DigestException - if the JVM doesn't know the MD5 algorithm

md5

public static byte[] md5(String in)

Calculate the MD5 checksum of a string.

Throws:

DigestException - if the JVM doesn't know the MD5 algorithm

md5

public static byte[] md5(File in)
                  throws IOException

Calculate the MD5 checksum of a File.

Throws:

IOException - if there is an error reading the file

DigestException - if the JVM doesn't know the MD5 algorithm