Package com.mku.salmon.text

Class TextDecryptor

java.lang.Object

com.mku.salmon.text.TextDecryptor

public class TextDecryptor
extends Object

Utility class that decrypts text strings.

Constructor Summary

Constructors

Constructor	Description
TextDecryptor()

Method Summary

Modifier and Type	Method	Description
static String	decryptString(String text, byte[] key)	Decrypts a text String using AES256 with the key using the embedded nonce.
static String	decryptString(String text, byte[] key, byte[] nonce)	Decrypts a text String using AES256 with the key and nonce provided.
static String	decryptString(String text, byte[] key, byte[] nonce, EncryptionFormat format)	Decrypts a text String using AES256 with the key and nonce provided.
static String	decryptString(String text, byte[] key, byte[] nonce, EncryptionFormat format, boolean integrity, byte[] hashKey, int chunkSize)	Decrypts a text String using AES256 with the key and nonce provided.

Methods inherited from class java.lang.Object

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

Constructor Details

TextDecryptor

public TextDecryptor()

Method Details

decryptString

public static String decryptString(String text,
 byte[] key)
                            throws IOException

Decrypts a text String using AES256 with the key using the embedded nonce.

Parameters:

text - Text to be decrypted.

key - The encryption key to be used.

Returns:

The decrypted text.

Throws:

IOException - Thrown if there is an IO error.

SecurityException - Thrown if there is a security exception

IntegrityException - Thrown if the data are corrupt or tampered with.

decryptString

public static String decryptString(String text,
 byte[] key,
 byte[] nonce)
                            throws IOException

Decrypts a text String using AES256 with the key and nonce provided.

Parameters:

text - Text to be decrypted.

key - The encryption key to be used.

nonce - The nonce to be used, set only if header=false.

Returns:

The decrypted text.

Throws:

IOException - Thrown if there is an IO error.

SecurityException - Thrown if there is a security exception

IntegrityException - Thrown if the data are corrupt or tampered with.

decryptString

public static String decryptString(String text,
 byte[] key,
 byte[] nonce,
 EncryptionFormat format)
                            throws IOException

Decrypts a text String using AES256 with the key and nonce provided.

Parameters:

text - Text to be decrypted.

key - The encryption key to be used.

nonce - The nonce to be used, set only if header=false.

format - The format to use, see EncryptionFormat

Returns:

The decrypted text.

Throws:

IOException - Thrown if there is an IO error.

SecurityException - Thrown if there is a security exception

IntegrityException - Thrown if the data are corrupt or tampered with.

decryptString

public static String decryptString(String text,
 byte[] key,
 byte[] nonce,
 EncryptionFormat format,
 boolean integrity,
 byte[] hashKey,
 int chunkSize)
                            throws IOException

Decrypts a text String using AES256 with the key and nonce provided.

Parameters:

text - Text to be decrypted.

key - The encryption key to be used.

nonce - The nonce to be used, set only if header=false.

format - The format to use, see EncryptionFormat

integrity - True if you want to calculate and store hash signatures for each chunkSize

hashKey - Hash key to be used for all chunks.

chunkSize - The chunk size.

Returns:

The decrypted text.

Throws:

IOException - Thrown if there is an IO error.

SecurityException - Thrown if there is a security exception

IntegrityException - Thrown if the data are corrupt or tampered with.