org.dihedron.crypto.operations.sign.pkcs7

Class PKCS7Signer

java.lang.Object

org.dihedron.crypto.CryptoService

org.dihedron.crypto.operations.sign.Signer

org.dihedron.crypto.operations.sign.pkcs7.PKCS7Signer

public class PKCS7Signer
extends Signer

Author:

Andrea Funto'

Field Summary

Fields inherited from class org.dihedron.crypto.operations.sign.Signer

keyring, provider

Constructor Summary

Constructors

Constructor and Description
PKCS7Signer(String alias, KeyRing keyring, Provider provider, SignatureAlgorithm algorithm) Constructor.
PKCS7Signer(String alias, KeyRing keyring, Provider provider, String digest, String encryption) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	initialise() Initialises the object.
byte[]	sign(byte[] data) Signs the given set of data.
boolean	verify(byte[] signed) Verifies the signature of the given set of encapsulated data.
boolean	verify(byte[] signed, byte[] data) Verifies the signature of the given set of detached data.

Methods inherited from class org.dihedron.crypto.operations.sign.Signer

getAlias, getKeyRing, getProvider, isEncapsulateData

Methods inherited from class java.lang.Object

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

Constructor Detail

PKCS7Signer

public PKCS7Signer(String alias,
           KeyRing keyring,
           Provider provider,
           SignatureAlgorithm algorithm)
            throws CryptoException

Constructor.

Parameters:

alias - the alias of the certificate to be used for signing.

keyring - the key ring containing the private key used for signing.

provider - the security provider backing up the key ring functionalities.

algorithm - the digest and encryption algorithm combination used to create the signature.

Throws:

CryptoException - if any among alias, key ring and provider is null.

PKCS7Signer

public PKCS7Signer(String alias,
           KeyRing keyring,
           Provider provider,
           String digest,
           String encryption)
            throws CryptoException

Constructor.

Parameters:

alias - the alias of the certificate to be used for signing.

keyring - the key ring containing the private key used for signing.

provider - the security provider backing up the key ring functionalities.

digest - the algorithm used to hash the data.

encryption - the algorithm used to encrypt the hash.

Throws:

CryptoException - if any among alias, key ring and provider is null.

Method Detail

initialise

public void initialise()
                throws CryptoException

Description copied from class: Signer

Initialises the object.

Specified by:

initialise in class Signer

Throws:

CryptoException - if anything went wrong accessing, opening or interpreting the keystore.

sign

public byte[] sign(byte[] data)
            throws CryptoException

Description copied from class: Signer

Signs the given set of data.

Specified by:

sign in class Signer

Parameters:

data - the data to be signed.

Returns:

the signed data as a byte array.

Throws:

CryptoException

verify

public boolean verify(byte[] signed)
               throws CryptoException

Description copied from class: Signer

Verifies the signature of the given set of encapsulated data.

Specified by:

verify in class Signer

Parameters:

signed - the encapsulated data.

Returns:

whether the signature is valid.

Throws:

CryptoException

verify

public boolean verify(byte[] signed,
             byte[] data)
               throws CryptoException

Description copied from class: Signer

Verifies the signature of the given set of detached data.

Specified by:

verify in class Signer

Parameters:

signed - the detached data whose signature is to be verified.

data - the original, plain text data.

Returns:

Throws:

CryptoException