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Bouncy Castle Cryptography Library 1.46 | ||||||||
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java.lang.Objectorg.bouncycastle.crypto.signers.ISO9796d2Signer
public class ISO9796d2Signer
ISO9796-2 - mechanism using a hash function with recovery (scheme 1)
Field Summary | |
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static int |
TRAILER_IMPLICIT
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static int |
TRAILER_RIPEMD128
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static int |
TRAILER_RIPEMD160
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static int |
TRAILER_SHA1
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static int |
TRAILER_SHA256
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static int |
TRAILER_SHA384
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static int |
TRAILER_SHA512
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static int |
TRAILER_WHIRLPOOL
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Constructor Summary | |
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ISO9796d2Signer(AsymmetricBlockCipher cipher,
Digest digest)
Constructor for a signer with an explicit digest trailer. |
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ISO9796d2Signer(AsymmetricBlockCipher cipher,
Digest digest,
boolean implicit)
Generate a signer for the with either implicit or explicit trailers for ISO9796-2. |
Method Summary | |
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byte[] |
generateSignature()
generate a signature for the loaded message using the key we were initialised with. |
byte[] |
getRecoveredMessage()
Return a reference to the recoveredMessage message. |
boolean |
hasFullMessage()
Return true if the full message was recoveredMessage. |
void |
init(boolean forSigning,
CipherParameters param)
Initialise the signer for signing or verification. |
void |
reset()
reset the internal state |
void |
update(byte b)
update the internal digest with the byte b |
void |
update(byte[] in,
int off,
int len)
update the internal digest with the byte array in |
void |
updateWithRecoveredMessage(byte[] signature)
Perform an update with the recovered message before adding any other data. |
boolean |
verifySignature(byte[] signature)
return true if the signature represents a ISO9796-2 signature for the passed in message. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int TRAILER_IMPLICIT
public static final int TRAILER_RIPEMD160
public static final int TRAILER_RIPEMD128
public static final int TRAILER_SHA1
public static final int TRAILER_SHA256
public static final int TRAILER_SHA512
public static final int TRAILER_SHA384
public static final int TRAILER_WHIRLPOOL
Constructor Detail |
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public ISO9796d2Signer(AsymmetricBlockCipher cipher, Digest digest, boolean implicit)
cipher
- base cipher to use for signature creation/verificationdigest
- digest to use.implicit
- whether or not the trailer is implicit or gives the hash.public ISO9796d2Signer(AsymmetricBlockCipher cipher, Digest digest)
cipher
- cipher to use.digest
- digest to sign with.Method Detail |
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public void init(boolean forSigning, CipherParameters param)
Signer
init
in interface Signer
forSigning
- true if for signing, false otherwiseparam
- necessary parameters.public void updateWithRecoveredMessage(byte[] signature) throws InvalidCipherTextException
SignerWithRecovery
updateWithRecoveredMessage
in interface SignerWithRecovery
signature
- the signature that we are in the process of verifying.
InvalidCipherTextException
public void update(byte b)
update
in interface Signer
public void update(byte[] in, int off, int len)
update
in interface Signer
public void reset()
reset
in interface Signer
public byte[] generateSignature() throws CryptoException
generateSignature
in interface Signer
CryptoException
public boolean verifySignature(byte[] signature)
verifySignature
in interface Signer
public boolean hasFullMessage()
hasFullMessage
in interface SignerWithRecovery
SignerWithRecovery.hasFullMessage()
public byte[] getRecoveredMessage()
getRecoveredMessage
in interface SignerWithRecovery
SignerWithRecovery.getRecoveredMessage()
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