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java.lang.Objectnet.rim.device.api.crypto.PKCS1FormatterEngine
public final class PKCS1FormatterEngine
The PKCS1FormatterEngine
class provides the PKCS1 encoding functionality on a block
by block basis. The block length is the size of the modulus of an
EncryptorEngine
minus the overhead.
We implemented the PKCS1 formatter engine as per the PKCS #1 version 2.1 document.
For a code sample using the PKCS1 formatter engine, click here.
For information on cryptographic algorithms, see Crypto Algorithms.
PKCS1UnformatterEngine
Constructor Summary | ||
---|---|---|
|
PKCS1FormatterEngine(PublicKeyEncryptorEngine encryptorEngine)
Creates a PKCS1FormatterEngine object that takes a
PublicKeyEncryptorEngine object
that will be used for encrypting the ciphertext. |
Method Summary | ||
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|
int |
formatAndEncrypt(byte[] input,
int inputOffset,
int inputLength,
byte[] output,
int outputOffset)
Formats the input into the proper format and then encrypts it, assuming this is not the last block to be encrypted. |
|
int |
formatAndEncrypt(byte[] input,
int inputOffset,
int inputLength,
byte[] output,
int outputOffset,
boolean lastBlock)
Formats the input into the proper format and then encrypts it. |
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String |
getAlgorithm()
Returns the name of the algorithm used, ie PublicKeyEncryptorEngine.getAlgorithm() + "_PKCS1" . |
|
int |
getInputBlockLength()
Returns the length of an input block in bytes. |
|
int |
getOutputBlockLength()
Returns the length of an output block in bytes. |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public PKCS1FormatterEngine(PublicKeyEncryptorEngine encryptorEngine)
PKCS1FormatterEngine
object that takes a
PublicKeyEncryptorEngine
object
that will be used for encrypting the ciphertext.
encryptorEngine
- The private key engine to encrypt the data with.Method Detail |
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public String getAlgorithm()
PublicKeyEncryptorEngine.getAlgorithm() + "_PKCS1"
.
getAlgorithm
in interface BlockFormatterEngine
public int getInputBlockLength()
BlockFormatterEngine
getInputBlockLength
in interface BlockFormatterEngine
public int getOutputBlockLength()
BlockFormatterEngine
getOutputBlockLength
in interface BlockFormatterEngine
public int formatAndEncrypt(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset, boolean lastBlock) throws MessageTooLongException, CryptoTokenException
BlockFormatterEngine
formatAndEncrypt
in interface BlockFormatterEngine
input
- A byte array containing the data to be encrypted.inputOffset
- The offset, or initial bit position, of the data within the byte array.inputLength
- The amount of data to encrypt.output
- A byte array to hold the encoded and encrypted data.outputOffset
- The offset, or initial bit position, of the data within the byte array.lastBlock
- A boolean that indicates the last block
to be encrypted.
MessageTooLongException
- Thrown if the input is too long to be encoded
with the given encoding scheme.
CryptoTokenException
- Thrown when a problem occurs with a crypto token or the crypto token is invalid.public int formatAndEncrypt(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset) throws MessageTooLongException, CryptoTokenException
BlockFormatterEngine
formatAndEncrypt
in interface BlockFormatterEngine
input
- A byte array containing the data to be encrypted.inputOffset
- The offset, or initial bit position, of the data within the byte array.inputLength
- The amount of data to encrypt.output
- A byte array to hold the encoded and encrypted data.outputOffset
- The offset, or initial bit position, of the data within the byte array.
MessageTooLongException
- Thrown if the input is too long to be encoded
with the given encoding scheme.
CryptoTokenException
- Thrown when a problem occurs with a crypto token or the crypto token is invalid.
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