ptolemy.actor.lib.jjs.modules.crypto

Class CryptoHelper

java.lang.Object

ptolemy.actor.lib.jjs.HelperBase

ptolemy.actor.lib.jjs.modules.crypto.CryptoHelper

public class CryptoHelper
extends HelperBase

Helper for the crypto JavaScript module.

Since:

Ptolemy II 11.0

Version:

$Id$

Author:

Hokeun Kim

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Yellow (eal)

Nested Class Summary

Nested classes/interfaces inherited from class ptolemy.actor.lib.jjs.HelperBase

HelperBase.DATA_TYPE

Field Summary

Fields inherited from class ptolemy.actor.lib.jjs.HelperBase

_actor, _currentObj

Constructor Summary

Constructors

Constructor and Description
CryptoHelper(java.lang.Object actor, jdk.nashorn.api.scripting.ScriptObjectMirror currentObj) Constructor for CryptoHelper.

Method Summary

Modifier and Type	Method and Description
int	getHashLength(java.lang.String hashAlgorithm) Return the hash length for the given hash algorithm.
int	getMacLength(java.lang.String macAlgorithm) Return the MAC (Message Authentication Code) length for the given MAC algorithm.
java.lang.Object	hash(java.lang.Object input, java.lang.String hashAlgorithm) Hash the input with a given hash algorithm and return the hashed result.
java.lang.Object	hmac(java.lang.Object input, java.lang.Object key, java.lang.String hmacAlgorithm) Calculate HMAC (key-Hashed Message Authentication Code) for the given input and key.
java.security.PrivateKey	loadPrivateKey(java.lang.String filePath) Load and return a private key from a RSA private key file in DER format.
java.security.PublicKey	loadPublicKey(java.lang.String filePath) Load and return a public key from a X.509 certificate file in PEM format.
java.lang.Object	privateDecrypt(java.lang.Object input, java.security.PrivateKey privateKey, java.lang.String cipherAlgorithm) Decrypt the input with an asymmetric cipher private key and return the decrypted result.
java.lang.Object	publicEncrypt(java.lang.Object input, java.security.PublicKey publicKey, java.lang.String cipherAlgorithm) Encrypt the input with an asymmetric cipher public key and return the encrypted result.
java.lang.Object	randomBytes(int size) Return an array of randomly generated bytes.
java.lang.Object	signWithPrivateKey(java.lang.Object input, java.security.PrivateKey privateKey, java.lang.String signAlgorithm) Sign the given input data with a private key and return the signature.
java.lang.Object	symmetricDecrypt(java.lang.Object input, java.lang.Object key, java.lang.String cipherAlgorithm) Decrypt the input with a symmetric cipher and return the decrypted result.
java.lang.Object	symmetricEncrypt(java.lang.Object input, java.lang.Object key, java.lang.String cipherAlgorithm) Encrypt the input with a symmetric cipher and return the encrypted result.
boolean	verifySignature(java.lang.Object data, java.lang.Object signature, java.security.PublicKey publicKey, java.lang.String signAlgorithm) Verify the signature for given input data and public key of the signer.

Methods inherited from class ptolemy.actor.lib.jjs.HelperBase

_appendNumericToBuffer, _appendToBuffer, _error, _error, _error, _error, _extractFromBuffer, _issueResponse, _removeDuplicates, _sizeOfType, _toJavaBytes, _toJSArray, getHelping

Methods inherited from class java.lang.Object

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

Constructor Detail

CryptoHelper

public CryptoHelper(java.lang.Object actor,
                    jdk.nashorn.api.scripting.ScriptObjectMirror currentObj)

Constructor for CryptoHelper.

Parameters:

actor - The actor associated with this helper.

currentObj - The JavaScript object that this is helping.

Method Detail

getHashLength

public int getHashLength(java.lang.String hashAlgorithm)
                  throws IllegalActionException

Return the hash length for the given hash algorithm.

Parameters:

hashAlgorithm - The name of the hash algorithm.

Returns:

The hash length for the hash algorithm.

Throws:

IllegalActionException - If the specified hash algorithm is not available.

getMacLength

public int getMacLength(java.lang.String macAlgorithm)
                 throws IllegalActionException

Return the MAC (Message Authentication Code) length for the given MAC algorithm.

Parameters:

macAlgorithm - The name of the MAC algorithm.

Returns:

The MAC length for the MAC algorithm

Throws:

IllegalActionException

hash

public java.lang.Object hash(java.lang.Object input,
                             java.lang.String hashAlgorithm)
                      throws IllegalActionException

Hash the input with a given hash algorithm and return the hashed result.

Parameters:

input - The input in the JavaScript object to be hashed.

hashAlgorithm - The name of the hash algorithm to be used. (Examples: MD5, SHA-1, SHA-256)

Returns:

The hash digested for the given input.

Throws:

IllegalActionException - If the specified hash algorithm is not available.

hmac

public java.lang.Object hmac(java.lang.Object input,
                             java.lang.Object key,
                             java.lang.String hmacAlgorithm)
                      throws IllegalActionException

Calculate HMAC (key-Hashed Message Authentication Code) for the given input and key.

Parameters:

input - The input in the JavaScript object to be HMAC hashed.

key - The key to be used for HMAC calculation.

hmacAlgorithm - The name of the HMAC algorithm.

Returns:

The resulting HMAC.

Throws:

IllegalActionException - If the HMAC calculation fails.

loadPrivateKey

public java.security.PrivateKey loadPrivateKey(java.lang.String filePath)
                                        throws IllegalActionException

Load and return a private key from a RSA private key file in DER format.

Parameters:

filePath - The path for the file that stores a RSA private key in DER format.

Returns:

PrivateKey object loaded from the file.

Throws:

IllegalActionException - If there is a problem with loading the private key.

loadPublicKey

public java.security.PublicKey loadPublicKey(java.lang.String filePath)
                                      throws IllegalActionException

Load and return a public key from a X.509 certificate file in PEM format.

Parameters:

filePath - The path for the file that stores a X.509 certificate.

Returns:

PublicKey object loaded from the certificate.

Throws:

IllegalActionException - If there is a problem with loading the public key.

privateDecrypt

public java.lang.Object privateDecrypt(java.lang.Object input,
                                       java.security.PrivateKey privateKey,
                                       java.lang.String cipherAlgorithm)
                                throws IllegalActionException

Decrypt the input with an asymmetric cipher private key and return the decrypted result.

Parameters:

input - The cipher text to be decrypted.

privateKey - The private key of the destination entity.

cipherAlgorithm - The name of the asymmetric cipher to be used for decryption.

Returns:

The decrypted result in a JavaScript integer array.

Throws:

IllegalActionException - If the private key decryption fails.

publicEncrypt

public java.lang.Object publicEncrypt(java.lang.Object input,
                                      java.security.PublicKey publicKey,
                                      java.lang.String cipherAlgorithm)
                               throws IllegalActionException

Encrypt the input with an asymmetric cipher public key and return the encrypted result.

Parameters:

input - The clear text message to be encrypted.

publicKey - The public key of the entity that will decrypt the message.

cipherAlgorithm - The name of the asymmetric cipher to be used for encryption.

Returns:

The encrypted result in a JavaScript integer array.

Throws:

IllegalActionException - If the public key encryption fails.

randomBytes

public java.lang.Object randomBytes(int size)
                             throws IllegalActionException

Return an array of randomly generated bytes.

Parameters:

size - The number of bytes to be generated.

Returns:

A JavaScript integer array that is randomly generated.

Throws:

IllegalActionException - If the generated bytes cannot be converted to JavaScript array.

signWithPrivateKey

public java.lang.Object signWithPrivateKey(java.lang.Object input,
                                           java.security.PrivateKey privateKey,
                                           java.lang.String signAlgorithm)
                                    throws IllegalActionException

Sign the given input data with a private key and return the signature.

Parameters:

input - The input data to be signed in a JavaScript object.

privateKey - The public key of the entity that will decrypt the message.

signAlgorithm - The name of the algorithm to be used for signing.

Returns:

Signature calculated from the input data.

Throws:

IllegalActionException

symmetricDecrypt

public java.lang.Object symmetricDecrypt(java.lang.Object input,
                                         java.lang.Object key,
                                         java.lang.String cipherAlgorithm)
                                  throws IllegalActionException

Decrypt the input with a symmetric cipher and return the decrypted result.

Parameters:

input - The cipher text to be decrypted.

key - The secret key for the cipher.

cipherAlgorithm - The name of the symmetric cipher algorithm to be used for decryption. (examples: AES-128-CBC, DES-ECB)

Returns:

The encrypted result in JavaScript byte array.

Throws:

IllegalActionException - If the decryption fails.

symmetricEncrypt

public java.lang.Object symmetricEncrypt(java.lang.Object input,
                                         java.lang.Object key,
                                         java.lang.String cipherAlgorithm)
                                  throws IllegalActionException

Encrypt the input with a symmetric cipher and return the encrypted result.

Parameters:

input - The clear text message to be encrypted.

key - The secret key for the cipher.

cipherAlgorithm - The name of the symmetric cipher algorithm to be used for encryption. (examples: AES-128-CBC, DES-ECB)

Returns:

The encrypted result in JavaScript byte array.

Throws:

IllegalActionException - If the encryption fails.

verifySignature

public boolean verifySignature(java.lang.Object data,
                               java.lang.Object signature,
                               java.security.PublicKey publicKey,
                               java.lang.String signAlgorithm)
                        throws java.lang.IllegalArgumentException

Verify the signature for given input data and public key of the signer.

Parameters:

data - The input data to be verified.

signature - The signature to be verified.

publicKey - The public key to be used for signature verification.

signAlgorithm - The name of the algorithm to be used for signature verification.

Returns:

Whether the signature is valid.

Throws:

java.lang.IllegalArgumentException