Class Overview
EC-NR as described in IEEE 1363-2000
Summary
Public Methods |
BigInteger[]
|
generateSignature(byte[] digest)
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[] digest, BigInteger r, BigInteger s)
return true if the value r and s represent a signature for the
message passed in.
|
Public Constructors
Public Methods
public
BigInteger[]
generateSignature
(byte[] digest)
generate a signature for the given message using the key we were
initialised with. Generally, the order of the curve should be at
least as long as the hash of the message of interest, and with
ECNR it *must* be at least as long.
Parameters
digest
| the digest to be signed. |
Returns
- two big integers representing the r and s values respectively.
public
void
init
(boolean forSigning, CipherParameters param)
initialise the signer for signature generation or signature
verification.
Parameters
forSigning
| true if we are generating a signature, false
otherwise. |
param
| key parameters for signature generation.
|
public
boolean
verifySignature
(byte[] digest, BigInteger r, BigInteger s)
return true if the value r and s represent a signature for the
message passed in. Generally, the order of the curve should be at
least as long as the hash of the message of interest, and with
ECNR, it *must* be at least as long. But just in case the signer
applied mod(n) to the longer digest, this implementation will
apply mod(n) during verification.
Parameters
digest
| the digest to be verified. |
r
| the r value of the signature. |
s
| the s value of the signature. |