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java.lang.Objectorg.jets3t.service.security.EncryptionUtil
public class EncryptionUtil
Utility class to handle encryption and decryption in the JetS3t suite.
This class uses properties obtained through Jets3tProperties
.
For more information on these properties please refer to
JetS3t Configuration
Field Summary | |
---|---|
static String |
DEFAULT_ALGORITHM
|
static String |
DEFAULT_VERSION
|
Constructor Summary | |
---|---|
EncryptionUtil(String encryptionKey)
Constructs class configured with the provided password, and set up to use the default encryption algorithm PBEWithMD5AndDES. |
|
EncryptionUtil(String encryptionKey,
String algorithm,
String version)
Constructs class configured with the provided password, and set up to use the encryption method specified. |
Method Summary | |
---|---|
static byte[] |
convertRsaPemToDer(InputStream is)
Convert a PEM encoded RSA certificate file into a DER format byte array. |
byte[] |
decrypt(byte[] data)
Decrypts byte data to bytes. |
byte[] |
decrypt(byte[] data,
int startIndex,
int endIndex)
Decrypts a byte data range to bytes. |
CipherInputStream |
decrypt(InputStream is)
Wraps an input stream in an decrypting cipher stream. |
CipherOutputStream |
decrypt(OutputStream os)
Wraps an output stream in a decrypting cipher stream. |
String |
decryptString(byte[] data)
Decrypts byte data to a UTF-8 string. |
String |
decryptString(byte[] data,
int startIndex,
int endIndex)
Decrypts a UTF-8 string. |
byte[] |
encrypt(byte[] data)
Encrypts byte data to bytes. |
CipherInputStream |
encrypt(InputStream is)
Wraps an input stream in an encrypting cipher stream. |
CipherOutputStream |
encrypt(OutputStream os)
Wraps an output stream in an encrypting cipher stream. |
byte[] |
encrypt(String data)
Encrypts a UTF-8 string to byte data. |
String |
getAlgorithm()
|
long |
getEncryptedOutputSize(long inputSize)
Returns an estimate of the number of bytes that will result when data of the given length is encrypted. |
static boolean |
isCipherAvailableForUse(String cipher)
Returns true if the given cipher is available and can be used by this encryption utility. |
static String[] |
listAvailablePbeCiphers(boolean testAvailability)
Lists the PBE ciphers available on the system, optionally eliminating those ciphers that are apparently available but cannot actually be used (perhaps due to the lack of export-grade JCE settings). |
static Provider[] |
listAvailableProviders()
|
static void |
main(String[] args)
|
static byte[] |
signWithRsaSha1(byte[] derPrivateKeyBytes,
byte[] dataToSign)
Generate an RSA SHA1 signature of the given data using the given private key DER certificate. |
Methods inherited from class java.lang.Object |
---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String DEFAULT_VERSION
public static final String DEFAULT_ALGORITHM
Constructor Detail |
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public EncryptionUtil(String encryptionKey, String algorithm, String version) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException
encryptionKey
- the password to use for encryption/decryption.algorithm
- the Java name of an encryption algorithm to use, eg PBEWithMD5AndDESversion
- the version of encyption to use, for historic and future compatibility.
Unless using an historic version, this should always be
DEFAULT_VERSION
InvalidKeyException
NoSuchAlgorithmException
NoSuchPaddingException
InvalidKeySpecException
public EncryptionUtil(String encryptionKey) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException
encryptionKey
- the password to use for encryption/decryption.
InvalidKeyException
NoSuchAlgorithmException
NoSuchPaddingException
InvalidKeySpecException
Method Detail |
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public byte[] encrypt(String data) throws IllegalStateException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException, InvalidKeySpecException, InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
data
- data to encrypt.
IllegalStateException
IllegalBlockSizeException
BadPaddingException
UnsupportedEncodingException
InvalidKeySpecException
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public String decryptString(byte[] data) throws InvalidKeyException, InvalidAlgorithmParameterException, UnsupportedEncodingException, IllegalStateException, IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException, NoSuchPaddingException
data
- data to decrypt.
InvalidKeyException
InvalidAlgorithmParameterException
UnsupportedEncodingException
IllegalStateException
IllegalBlockSizeException
BadPaddingException
NoSuchAlgorithmException
NoSuchPaddingException
public String decryptString(byte[] data, int startIndex, int endIndex) throws InvalidKeyException, InvalidAlgorithmParameterException, UnsupportedEncodingException, IllegalStateException, IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException, NoSuchPaddingException
data
- data to decrypt.startIndex
- start index of data to decrypt.endIndex
- end index of data to decrypt.
InvalidKeyException
InvalidAlgorithmParameterException
UnsupportedEncodingException
IllegalStateException
IllegalBlockSizeException
BadPaddingException
NoSuchAlgorithmException
NoSuchPaddingException
public byte[] encrypt(byte[] data) throws IllegalStateException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
data
- data to encrypt.
IllegalStateException
IllegalBlockSizeException
BadPaddingException
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public byte[] decrypt(byte[] data) throws InvalidKeyException, InvalidAlgorithmParameterException, IllegalStateException, IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException, NoSuchPaddingException
data
- data to decrypt
InvalidKeyException
InvalidAlgorithmParameterException
IllegalStateException
IllegalBlockSizeException
BadPaddingException
NoSuchAlgorithmException
NoSuchPaddingException
public byte[] decrypt(byte[] data, int startIndex, int endIndex) throws InvalidKeyException, InvalidAlgorithmParameterException, IllegalStateException, IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException, NoSuchPaddingException
data
- startIndex
- endIndex
-
InvalidKeyException
InvalidAlgorithmParameterException
IllegalStateException
IllegalBlockSizeException
BadPaddingException
NoSuchAlgorithmException
NoSuchPaddingException
public CipherInputStream encrypt(InputStream is) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
is
-
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public CipherInputStream decrypt(InputStream is) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
is
-
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public CipherOutputStream encrypt(OutputStream os) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
os
-
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public CipherOutputStream decrypt(OutputStream os) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
os
-
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public long getEncryptedOutputSize(long inputSize) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
inputSize
- The number of bytes you intend to encrypt.
InvalidKeyException
InvalidAlgorithmParameterException
NoSuchAlgorithmException
NoSuchPaddingException
public String getAlgorithm()
public static boolean isCipherAvailableForUse(String cipher)
cipher
-
public static String[] listAvailablePbeCiphers(boolean testAvailability)
testAvailability
- if true each apparently available cipher is tested and only those that pass
isCipherAvailableForUse(String)
are returned.
public static Provider[] listAvailableProviders()
public static byte[] signWithRsaSha1(byte[] derPrivateKeyBytes, byte[] dataToSign) throws NoSuchAlgorithmException, InvalidKeyException, SignatureException, InvalidKeySpecException, NoSuchProviderException
NoSuchAlgorithmException
InvalidKeyException
SignatureException
InvalidKeySpecException
NoSuchProviderException
public static byte[] convertRsaPemToDer(InputStream is) throws IOException
is
- Input stream for PEM encoded RSA certificate data.
IOException
public static void main(String[] args) throws Exception
Exception
|
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