56 * }
57 * </pre>
58 *
59 * We currently ignore the optional parameters and publicKey fields. We
60 * require that the parameters are encoded as part of the AlgorithmIdentifier,
61 * not in the private key structure.
62 *
63 * @since 1.6
64 * @author Andreas Sterbenz
65 */
66 public final class ECPrivateKeyImpl extends PKCS8Key implements ECPrivateKey {
67
68 private static final long serialVersionUID = 88695385615075129L;
69
70 private BigInteger s; // private value
71 private ECParameterSpec params;
72
73 /**
74 * Construct a key from its encoding. Called by the ECKeyFactory.
75 */
76 ECPrivateKeyImpl(byte[] encoded) throws InvalidKeyException {
77 decode(encoded);
78 }
79
80 /**
81 * Construct a key from its components. Used by the
82 * KeyFactory.
83 */
84 ECPrivateKeyImpl(BigInteger s, ECParameterSpec params)
85 throws InvalidKeyException {
86 this.s = s;
87 this.params = params;
88 // generate the encoding
89 algid = new AlgorithmId
90 (AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params));
91 try {
92 DerOutputStream out = new DerOutputStream();
93 out.putInteger(1); // version 1
94 byte[] privBytes = ECUtil.trimZeroes(s.toByteArray());
95 out.putOctetString(privBytes);
96 DerValue val =
97 new DerValue(DerValue.tag_Sequence, out.toByteArray());
98 key = val.toByteArray();
99 } catch (IOException exc) {
100 // should never occur
101 throw new InvalidKeyException(exc);
102 }
103 }
104
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56 * }
57 * </pre>
58 *
59 * We currently ignore the optional parameters and publicKey fields. We
60 * require that the parameters are encoded as part of the AlgorithmIdentifier,
61 * not in the private key structure.
62 *
63 * @since 1.6
64 * @author Andreas Sterbenz
65 */
66 public final class ECPrivateKeyImpl extends PKCS8Key implements ECPrivateKey {
67
68 private static final long serialVersionUID = 88695385615075129L;
69
70 private BigInteger s; // private value
71 private ECParameterSpec params;
72
73 /**
74 * Construct a key from its encoding. Called by the ECKeyFactory.
75 */
76 public ECPrivateKeyImpl(byte[] encoded) throws InvalidKeyException {
77 decode(encoded);
78 }
79
80 /**
81 * Construct a key from its components. Used by the
82 * KeyFactory.
83 */
84 public ECPrivateKeyImpl(BigInteger s, ECParameterSpec params)
85 throws InvalidKeyException {
86 this.s = s;
87 this.params = params;
88 // generate the encoding
89 algid = new AlgorithmId
90 (AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params));
91 try {
92 DerOutputStream out = new DerOutputStream();
93 out.putInteger(1); // version 1
94 byte[] privBytes = ECUtil.trimZeroes(s.toByteArray());
95 out.putOctetString(privBytes);
96 DerValue val =
97 new DerValue(DerValue.tag_Sequence, out.toByteArray());
98 key = val.toByteArray();
99 } catch (IOException exc) {
100 // should never occur
101 throw new InvalidKeyException(exc);
102 }
103 }
104
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