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Bouncy Castle Cryptography 1.50 | ||||||||
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java.lang.Objectorg.bouncycastle.crypto.signers.ECDSASigner
public class ECDSASigner
EC-DSA as described in X9.62
Field Summary |
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Fields inherited from interface org.bouncycastle.math.ec.ECConstants |
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FOUR, ONE, THREE, TWO, ZERO |
Constructor Summary | |
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ECDSASigner()
Default configuration, random K values. |
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ECDSASigner(DSAKCalculator kCalculator)
Configuration with an alternate, possibly deterministic calculator of K. |
Method Summary | |
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java.math.BigInteger[] |
generateSignature(byte[] message)
generate a signature for the given message using the key we were initialised with. |
void |
init(boolean forSigning,
CipherParameters param)
initialise the signer for signature generation or signature verification. |
boolean |
verifySignature(byte[] message,
java.math.BigInteger r,
java.math.BigInteger s)
return true if the value r and s represent a DSA signature for the passed in message (for standard DSA the message should be a SHA-1 hash of the real message to be verified). |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ECDSASigner()
public ECDSASigner(DSAKCalculator kCalculator)
kCalculator
- a K value calculator.Method Detail |
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public void init(boolean forSigning, CipherParameters param)
DSA
init
in interface DSA
forSigning
- true if we are generating a signature, false
otherwise.param
- key parameters for signature generation.public java.math.BigInteger[] generateSignature(byte[] message)
generateSignature
in interface DSA
message
- the message that will be verified later.
public boolean verifySignature(byte[] message, java.math.BigInteger r, java.math.BigInteger s)
verifySignature
in interface DSA
message
- the message that was supposed to have been signed.r
- the r signature value.s
- the s signature value.
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