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@TransactionType(value=SUPPORTS) public interface ECPrivateKey
The ECPrivateKey interface is used to generate signatures on
data using the ECDSA (Elliptic Curve Digital Signature Algorithm) and to
generate shared secrets using the ECDH (Elliptic Curve Diffie-Hellman)
algorithm. An implementation of ECPrivateKey interface must
also implement the ECKey interface methods.
When all components of the key (S, A, B, G, R, Field) are set, the key is
initialized and ready for use. In addition, the KeyAgreement
algorithm type ALG_EC_SVDP_DHC requires that the cofactor, K,
be initialized.
The notation used to describe parameters specific to the EC algorithm is based on the naming conventions established in [IEEE P1363].
ECPublicKey,
KeyBuilder,
Signature,
javacardx.crypto.KeyEncryption,
KeyAgreement| Method Summary | |
|---|---|
short |
getS(byte[] buffer,
short offset)
Returns the value of the secret key in plaintext form. |
void |
setS(byte[] buffer,
short offset,
short length)
Sets the value of the secret key. |
| Methods inherited from interface javacard.security.Key |
|---|
clearKey, getSize, getType, getTypeName, isInitialized |
| Methods inherited from interface javacard.security.ECKey |
|---|
getA, getB, getField, getG, getK, getR, setA, setB, setFieldF2M, setFieldF2M, setFieldFP, setG, setK, setR |
| Method Detail |
|---|
void setS(byte[] buffer,
short offset,
short length)
throws CryptoException
Note:
javacardx.crypto.KeyEncryption
interface and the Cipher object specified via setKeyCipher()
is not null, the key value is decrypted using the Cipher object.
buffer - the input bufferoffset - the offset into the input buffer at which the secret value is
to beginlength - the byte length of the secret value
CryptoException - with the following reason code:
CryptoException.ILLEGAL_VALUE if the
length parameter is 0 or invalid or the
input key data is inconsistent with the key length or if
input data decryption is required and fails.
short getS(byte[] buffer,
short offset)
throws CryptoException
buffer - the output bufferoffset - the offset into the input buffer at which the secret value is
to begin
CryptoException - with the following reason code:
CryptoException.UNINITIALIZED_KEY if
the value of the secret key has not been successfully
initialized since the time the initialized state of the
key was set to false.
Key
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