Package com.codevasp.lazysodium.interfaces

Interface Box.Lazy

All Known Implementing Classes:

LazySodium, LazySodiumJava

Enclosing interface:

Box

public static interface Box.Lazy

Method Summary

Modifier and Type	Method	Description
String	cryptoBoxBeforeNm(byte[] publicKey, byte[] secretKey)	If you send several messages to the same receiver or receive several messages from the same sender, you can gain speed by calculating the shared key only once, and reusing it in subsequent operations.
String	cryptoBoxBeforeNm(KeyPair keyPair)	If you send several messages to the same receiver or receive several messages from the same sender, you can gain speed by calculating the shared key only once, and reusing it in subsequent operations.
DetachedEncrypt	cryptoBoxDetachedAfterNm(String message, byte[] nonce, String sharedSecretKey)	Encrypt a message but allow for storage of the mac separately.
String	cryptoBoxEasy(String message, byte[] nonce, KeyPair keyPair)	Encrypts a message.
String	cryptoBoxEasyAfterNm(String message, byte[] nonce, String sharedSecretKey)	Encrypt a message.
KeyPair	cryptoBoxKeypair()	Generate a secret and public key.
DetachedDecrypt	cryptoBoxOpenDetachedAfterNm(DetachedEncrypt detachedEncrypt, byte[] nonce, String sharedSecretKey)	Decrypt a message.
String	cryptoBoxOpenEasy(String cipherText, byte[] nonce, KeyPair keyPair)	Decrypts a previously encrypted message.
String	cryptoBoxOpenEasyAfterNm(String cipher, byte[] nonce, String sharedSecretKey)	Decrypt a message.
String	cryptoBoxSealEasy(String message, Key publicKey)	Encrypts a message.
String	cryptoBoxSealOpenEasy(String cipherText, KeyPair keyPair)	Decrypts a previously encrypted message.
KeyPair	cryptoBoxSeedKeypair(byte[] seed)	Generate a public and secret key deterministically.

Method Details

cryptoBoxKeypair

KeyPair cryptoBoxKeypair()
                  throws SodiumException

Generate a secret and public key.

Returns:

Secret and public key.

Throws:

SodiumException

cryptoBoxSeedKeypair

KeyPair cryptoBoxSeedKeypair(byte[] seed)
                      throws SodiumException

Generate a public and secret key deterministically.

Parameters:

seed - The seed to generate the key.

Returns:

Public and secret key.

Throws:

SodiumException

cryptoBoxEasy

String cryptoBoxEasy(String message,
 byte[] nonce,
 KeyPair keyPair)
              throws SodiumException

Encrypts a message.

Parameters:

message - The message.

nonce - The nonce of size Box.NONCEBYTES.

keyPair - A keypair.

Returns:

The encrypted Helpers.Lazy.sodiumBin2Hex(byte[])'ified cipher text.

Throws:

SodiumException

cryptoBoxOpenEasy

String cryptoBoxOpenEasy(String cipherText,
 byte[] nonce,
 KeyPair keyPair)
                  throws SodiumException

Decrypts a previously encrypted message.

Parameters:

cipherText - Encrypted via cryptoBoxEasy(String, byte[], KeyPair) and then Helpers.Lazy.sodiumBin2Hex(byte[])'ified.

nonce - The nonce of size Box.NONCEBYTES.

keyPair - A keypair.

Returns:

The message.

Throws:

SodiumException

cryptoBoxBeforeNm

String cryptoBoxBeforeNm(byte[] publicKey,
 byte[] secretKey)
                  throws SodiumException

If you send several messages to the same receiver or receive several messages from the same sender, you can gain speed by calculating the shared key only once, and reusing it in subsequent operations.

Parameters:

publicKey - A public key as generated by cryptoBoxKeypair().

secretKey - A secret key as generated by cryptoBoxKeypair().

Returns:

The shared secret key.

Throws:

SodiumException - Incorrect key lengths.

cryptoBoxBeforeNm

String cryptoBoxBeforeNm(KeyPair keyPair)
                  throws SodiumException

If you send several messages to the same receiver or receive several messages from the same sender, you can gain speed by calculating the shared key only once, and reusing it in subsequent operations.

Parameters:

keyPair - A public and secret key as generated by cryptoBoxKeypair().

Returns:

The shared secret key.

Throws:

SodiumException - Incorrect key lengths.

cryptoBoxEasyAfterNm

String cryptoBoxEasyAfterNm(String message,
 byte[] nonce,
 String sharedSecretKey)
                     throws SodiumException

Encrypt a message.

Parameters:

message - The message for encryption.

nonce - A randomly generated nonce via Random.nonce(int)}.

sharedSecretKey - The shared secret key as generated via cryptoBoxBeforeNm(KeyPair).

Returns:

The encrypted message.

Throws:

SodiumException - Incorrect key lengths or enc error.

cryptoBoxOpenEasyAfterNm

String cryptoBoxOpenEasyAfterNm(String cipher,
 byte[] nonce,
 String sharedSecretKey)
                         throws SodiumException

Decrypt a message.

Parameters:

cipher - The cipher text to be decrypted.

nonce - The same nonce used to encrypt the cipher - cryptoBoxEasyAfterNm(String, byte[], String).

sharedSecretKey - The shared secret key as generated via cryptoBoxBeforeNm(KeyPair).

Returns:

The decrypted message.

Throws:

SodiumException - Incorrect key lengths or decryption error.

cryptoBoxDetachedAfterNm

DetachedEncrypt cryptoBoxDetachedAfterNm(String message,
 byte[] nonce,
 String sharedSecretKey)
                                  throws SodiumException

Encrypt a message but allow for storage of the mac separately.

Parameters:

message - The message to encrypt.

nonce - A randomly generated nonce via Random.nonce(int)}.

sharedSecretKey - The shared secret key as generated via cryptoBoxBeforeNm(KeyPair).

Returns:

The encrypted message.

Throws:

SodiumException - Incorrect key lengths or enc error.

cryptoBoxOpenDetachedAfterNm

DetachedDecrypt cryptoBoxOpenDetachedAfterNm(DetachedEncrypt detachedEncrypt,
 byte[] nonce,
 String sharedSecretKey)
                                      throws SodiumException

Decrypt a message.

Parameters:

detachedEncrypt - The cipher and mac used to decrypted the message.

nonce - The same nonce used to encrypt - cryptoBoxDetachedAfterNm(String, byte[], String)}.

sharedSecretKey - The shared secret key as generated via cryptoBoxBeforeNm(KeyPair).

Returns:

The decrypted message with the mac.

Throws:

SodiumException - Incorrect key lengths or decryption error.

cryptoBoxSealEasy

String cryptoBoxSealEasy(String message,
 Key publicKey)
                  throws SodiumException

Encrypts a message.

Parameters:

message - The message.

publicKey - A public key.

Returns:

The encrypted Helpers.Lazy.sodiumBin2Hex(byte[])'ified cipher text.

Throws:

SodiumException

cryptoBoxSealOpenEasy

String cryptoBoxSealOpenEasy(String cipherText,
 KeyPair keyPair)
                      throws SodiumException

Decrypts a previously encrypted message.

Parameters:

cipherText - Encrypted via cryptoBoxSealEasy(String, Key) and then Helpers.Lazy.sodiumBin2Hex(byte[])'ified.

keyPair - A keypair.

Returns:

The message.

Throws:

SodiumException