com.microej.crypto.internal.signature

Class AbstractSignatureSpi

java.lang.Object

java.security.SignatureSpi

com.microej.crypto.internal.signature.AbstractSignatureSpi

Direct Known Subclasses:

NativeSignatureSpi

public abstract class AbstractSignatureSpi
extends SignatureSpi

Implementation copied from sun.security.ec.ECDSASignature and sun.security.rsa.RSASignature.

Field Summary

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor and Description
AbstractSignatureSpi(String messageDigestAlgorithmName)

Method Summary

Modifier and Type	Method and Description
protected void	engineInitSign(PrivateKey privateKey) Initializes this signature object with the specified private key for signing operations.
protected void	engineInitVerify(PublicKey publicKey) Initializes this signature object with the specified public key for verification operations.
protected byte[]	engineSign() Returns the signature bytes of all the data updated so far.
protected void	engineUpdate(byte b) Updates the data to be signed or verified using the specified byte.
protected void	engineUpdate(byte[] b, int off, int len) Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.
protected boolean	engineVerify(byte[] sigBytes) Verifies the passed-in signature.
protected byte[]	getDigestValue() Returns the message digest value.
protected abstract byte[]	implSign(byte[] digestValue)
protected abstract boolean	implVerify(byte[] sigBytes, byte[] digestValue)
protected void	resetDigest() Resets the message digest if needed.
protected abstract void	setKeys(PublicKey publicKey, PrivateKey privateKey) Sets the public and private keys for this signature.

Methods inherited from class java.security.SignatureSpi

clone, engineInitSign, engineSetParameter, engineSign, engineVerify

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSignatureSpi

public AbstractSignatureSpi(String messageDigestAlgorithmName)

Method Detail

engineInitSign

protected void engineInitSign(PrivateKey privateKey)
                       throws InvalidKeyException

Description copied from class: SignatureSpi

Initializes this signature object with the specified private key for signing operations.

Specified by:

engineInitSign in class SignatureSpi

Parameters:

privateKey - the private key of the identity whose signature will be generated.

Throws:

InvalidKeyException - if the key is improperly encoded, parameters are missing, and so on.

engineInitVerify

protected void engineInitVerify(PublicKey publicKey)
                         throws InvalidKeyException

Description copied from class: SignatureSpi

Initializes this signature object with the specified public key for verification operations.

Specified by:

engineInitVerify in class SignatureSpi

Parameters:

publicKey - the public key of the identity whose signature is going to be verified.

Throws:

InvalidKeyException - if the key is improperly encoded, parameters are missing, and so on.

engineSign

protected byte[] engineSign()
                     throws SignatureException

Description copied from class: SignatureSpi

Returns the signature bytes of all the data updated so far. The format of the signature depends on the underlying signature scheme.

Specified by:

engineSign in class SignatureSpi

Returns:

the signature bytes of the signing operation's result.

Throws:

SignatureException - if the engine is not initialized properly or if this signature algorithm is unable to process the input data provided.

engineUpdate

protected void engineUpdate(byte b)
                     throws SignatureException

Description copied from class: SignatureSpi

Updates the data to be signed or verified using the specified byte.

Specified by:

engineUpdate in class SignatureSpi

Parameters:

b - the byte to use for the update.

Throws:

SignatureException - if the engine is not initialized properly.

engineUpdate

protected void engineUpdate(byte[] b,
                            int off,
                            int len)
                     throws SignatureException

Description copied from class: SignatureSpi

Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.

Specified by:

engineUpdate in class SignatureSpi

Parameters:

b - the array of bytes

off - the offset to start from in the array of bytes

len - the number of bytes to use, starting at offset

Throws:

SignatureException - if the engine is not initialized properly

engineVerify

protected boolean engineVerify(byte[] sigBytes)
                        throws SignatureException

Description copied from class: SignatureSpi

Verifies the passed-in signature.

Specified by:

engineVerify in class SignatureSpi

Parameters:

sigBytes - the signature bytes to be verified.

Returns:

true if the signature was verified, false if not.

Throws:

SignatureException - if the engine is not initialized properly, the passed-in signature is improperly encoded or of the wrong type, if this signature algorithm is unable to process the input data provided, etc.

getDigestValue

protected byte[] getDigestValue()
                         throws SignatureException

Returns the message digest value.

Throws:

SignatureException

implSign

protected abstract byte[] implSign(byte[] digestValue)

implVerify

protected abstract boolean implVerify(byte[] sigBytes,
                                      byte[] digestValue)

resetDigest

protected void resetDigest()

Resets the message digest if needed.

setKeys

protected abstract void setKeys(PublicKey publicKey,
                                PrivateKey privateKey)
                         throws InvalidKeyException

Sets the public and private keys for this signature.

Parameters:

publicKey - the public key to set

privateKey - the private key to set

Throws:

InvalidKeyException - if one of the keys is invalid.