Package no.polaric.core.util

Class SecUtils

java.lang.Object

no.polaric.core.util.SecUtils

public class SecUtils
extends Object

Some utilities related to security.

Constructor Summary

Constructors

Constructor	Description
SecUtils()

Method Summary

Modifier and Type	Method	Description
static final byte[]	_digest(byte[] bytes, String txt, String algo)	Compute a hash from the text.
static final String	b2hex(byte[] bytes)	Hexadecimal representation of a byte array.
static final byte[]	b64decode(String txt)
static final String	b64encode(byte[] x)
static final byte[]	b91decode(String x)
static final String	b91encode(byte[] x)
static final byte[]	digest(byte[] bytes, String txt)	Deprecated. MD5 is cryptographically broken and should not normally be used for security purposes.
static final String	digestB64(String txt, int n)	Deprecated. This method uses MD5 which is cryptographically broken.
static final String	digestHex(String txt)	Deprecated. This method uses MD5 which is cryptographically broken.
static String	escape4regex(String x)	Escape a text-string for use as a part of a regular expression.
static final byte[]	getRandom(int size)	Generate a random key.
static final byte[]	hmac(String data, String key)	Compute a HMAC SHA256 from data and a key.
static final String	hmacB64(String txt, String key, int n)	Base 64 encoded HMAC SHA256.
static final String	hmacB91(String txt, String key, int n)
static final String	hmacHex(String txt, String key)	Compute a HMAC SHA256 from the text, represented as a hexadecimal string.
static final byte[]	xDigest(byte[] bytes, String txt)	Compute SHA-256 hash.
static final String	xDigestB64(String txt, int n)	Base 64 encoded digest (SHA256).
static final String	xDigestB91(String txt, int n)
static final String	xDigestHex(String txt)	Compute a (SHA256) hash from the text, represented as a hexadecimal string.

Methods inherited from class java.lang.Object

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

Constructor Details

SecUtils

public SecUtils()

Method Details

getRandom

public static final byte[] getRandom(int size)

Generate a random key.

_digest

public static final byte[] _digest(byte[] bytes,
 String txt,
 String algo)

Compute a hash from the text. Text can be given as an array of bytes, a string or both. A string will be converted to bytes using the UTF-8 encoding before computing the hash.

digest

@Deprecated
public static final byte[] digest(byte[] bytes,
 String txt)

Deprecated.

MD5 is cryptographically broken and should not normally be used for security purposes. Use xDigest() for SHA-256 instead. This method is retained for compatibility with legacy systems that require MD5.

Computes MD5 hash.

xDigest

public static final byte[] xDigest(byte[] bytes,
 String txt)

Compute SHA-256 hash.

hmac

public static final byte[] hmac(String data,
 String key)

Compute a HMAC SHA256 from data and a key.

Returns:

The hmac represented as a byte array.

digestHex

@Deprecated
public static final String digestHex(String txt)

Deprecated.

This method uses MD5 which is cryptographically broken. Use xDigestHex() instead.

Compute a hash from the text, represented as a hexadecimal string.

xDigestHex

public static final String xDigestHex(String txt)

Compute a (SHA256) hash from the text, represented as a hexadecimal string.

hmacHex

public static final String hmacHex(String txt,
 String key)

Compute a HMAC SHA256 from the text, represented as a hexadecimal string.

digestB64

@Deprecated
public static final String digestB64(String txt,
 int n)

Deprecated.

This method uses MD5 which is cryptographically broken. Use xDigestB64() instead.

Base 64 encoded digest. Returns n first characters of digest, encoded using the Base 64 method.

xDigestB64

public static final String xDigestB64(String txt,
 int n)

Base 64 encoded digest (SHA256). Returns n first characters of digest, encoded using the Base 64 method.

xDigestB91

public static final String xDigestB91(String txt,
 int n)

hmacB64

public static final String hmacB64(String txt,
 String key,
 int n)

Base 64 encoded HMAC SHA256. Returns n first characters of digest, encoded using the Base 64 method.

hmacB91

public static final String hmacB91(String txt,
 String key,
 int n)

b64encode

public static final String b64encode(byte[] x)

b64decode

public static final byte[] b64decode(String txt)

b91encode

public static final String b91encode(byte[] x)

b91decode

public static final byte[] b91decode(String x)

b2hex

public static final String b2hex(byte[] bytes)

Hexadecimal representation of a byte array.

escape4regex

public static String escape4regex(String x)

Escape a text-string for use as a part of a regular expression.