Java Code Examples for javacard.security.ECKey#setA()
The following examples show how to use
javacard.security.ECKey#setA() .
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Example 1
| Source File: ECP256.java From gauss-key-card with Apache License 2.0 | 5 votes |
|
public static void setCurveParameters(ECKey eckey) {
eckey.setFieldFP(p, (short)0, (short)(p.length));
eckey.setA(a, (short)0, (short)(a.length));
eckey.setB(b, (short)0, (short)(b.length));
eckey.setG(g, (short)0, (short)(g.length));
eckey.setR(r, (short)0, (short)(r.length));
}
Example 2
| Source File: Secp256r1.java From CCU2F with Apache License 2.0 | 5 votes |
|
protected static boolean setCommonCurveParameters(ECKey key) {
try {
key.setA(SECP256R1_A, (short)0, (short)SECP256R1_A.length);
key.setB(SECP256R1_B, (short)0, (short)SECP256R1_B.length);
key.setFieldFP(SECP256R1_FP, (short)0, (short)SECP256R1_FP.length);
key.setG(SECP256R1_G, (short)0, (short)SECP256R1_G.length);
key.setR(SECP256R1_R, (short)0, (short)SECP256R1_R.length);
key.setK(SECP256R1_K);
return true;
}
catch(Exception e) {
return false;
}
}
Example 3
| Source File: SECP256k1.java From status-keycard with Apache License 2.0 | 5 votes |
|
/**
* Sets the SECP256k1 curve parameters to the given ECKey (public or private).
*
* @param key the key where the curve parameters must be set
*/
void setCurveParameters(ECKey key) {
key.setA(SECP256K1_A, (short) 0x00, (short) SECP256K1_A.length);
key.setB(SECP256K1_B, (short) 0x00, (short) SECP256K1_B.length);
key.setFieldFP(SECP256K1_FP, (short) 0x00, (short) SECP256K1_FP.length);
key.setG(SECP256K1_G, (short) 0x00, (short) SECP256K1_G.length);
key.setR(SECP256K1_R, (short) 0x00, (short) SECP256K1_R.length);
key.setK(SECP256K1_K);
}
Example 4
| Source File: Secp256k1.java From SatochipApplet with GNU Affero General Public License v3.0 | 5 votes |
|
public static void setCommonCurveParameters(ECKey eckey){
eckey.setFieldFP( SECP256K1, OFFSET_SECP256K1_P, (short)32);
eckey.setA( SECP256K1, OFFSET_SECP256K1_a, (short)32);
eckey.setB( SECP256K1, OFFSET_SECP256K1_b, (short)32);
eckey.setR( SECP256K1, OFFSET_SECP256K1_R, (short)32);
eckey.setG( SECP256K1, OFFSET_SECP256K1_G, (short)65);
eckey.setK( SECP256K1_K);
}
Example 5
| Source File: Secp256r1.java From ledger-u2f-javacard with Apache License 2.0 | 5 votes |
|
protected static boolean setCommonCurveParameters(ECKey key) {
try {
key.setA(SECP256R1_A, (short) 0, (short) SECP256R1_A.length);
key.setB(SECP256R1_B, (short) 0, (short) SECP256R1_B.length);
key.setFieldFP(SECP256R1_FP, (short) 0, (short) SECP256R1_FP.length);
key.setG(SECP256R1_G, (short) 0, (short) SECP256R1_G.length);
key.setR(SECP256R1_R, (short) 0, (short) SECP256R1_R.length);
key.setK(SECP256R1_K);
return true;
} catch (Exception e) {
return false;
}
}
Example 6
| Source File: Secp256k1.java From ledger-javacard with GNU Affero General Public License v3.0 | 5 votes |
|
protected static boolean setCommonCurveParameters(ECKey key) {
try {
key.setA(SECP256K1_A, (short)0, (short)SECP256K1_A.length);
key.setB(SECP256K1_B, (short)0, (short)SECP256K1_B.length);
key.setFieldFP(SECP256K1_FP, (short)0, (short)SECP256K1_FP.length);
key.setG(SECP256K1_G, (short)0, (short)SECP256K1_G.length);
key.setR(SECP256K1_R, (short)0, (short)SECP256K1_R.length);
key.setK(SECP256K1_K);
return true;
}
catch(Exception e) {
return false;
}
}
Example 7
| Source File: IsoApplet.java From IsoApplet with GNU General Public License v3.0 | 4 votes |
|
/**
* \brief Initialize an EC key with the curve parameters from buf.
*
* \param buf The buffer containing the EC curve parameters. It must be TLV with the following format:
* 81 - prime
* 82 - coefficient A
* 83 - coefficient B
* 84 - base point G
* 85 - order
* 87 - cofactor
*
* \param bOff The offset at where the first entry is located.
*
* \param bLen The remaining length of buf.
*
* \param key The EC key to initialize.
*
* \throw NotFoundException Parts of the data needed to fully initialize
* the key were missing.
*
* \throw InvalidArgumentsException The ASN.1 sequence was malformatted.
*/
private void initEcParams(byte[] buf, short bOff, short bLen, ECKey key) throws NotFoundException, InvalidArgumentsException {
short pos = bOff;
short len;
/* Search for the prime */
pos = UtilTLV.findTag(buf, bOff, bLen, (byte) 0x81);
pos++;
len = UtilTLV.decodeLengthField(buf, pos);
pos += UtilTLV.getLengthFieldLength(len);
key.setFieldFP(buf, pos, len); // "p"
/* Search for coefficient A */
pos = UtilTLV.findTag(buf, bOff, bLen, (byte) 0x82);
pos++;
len = UtilTLV.decodeLengthField(buf, pos);
pos += UtilTLV.getLengthFieldLength(len);
key.setA(buf, pos, len);
/* Search for coefficient B */
pos = UtilTLV.findTag(buf, bOff, bLen, (byte) 0x83);
pos++;
len = UtilTLV.decodeLengthField(buf, pos);
pos += UtilTLV.getLengthFieldLength(len);
key.setB(buf, pos, len);
/* Search for base point G */
pos = UtilTLV.findTag(buf, bOff, bLen, (byte) 0x84);
pos++;
len = UtilTLV.decodeLengthField(buf, pos);
pos += UtilTLV.getLengthFieldLength(len);
key.setG(buf, pos, len); // G(x,y)
/* Search for order */
pos = UtilTLV.findTag(buf, bOff, bLen, (byte) 0x85);
pos++;
len = UtilTLV.decodeLengthField(buf, pos);
pos += UtilTLV.getLengthFieldLength(len);
key.setR(buf, pos, len); // Order of G - "q"
/* Search for cofactor */
pos = UtilTLV.findTag(buf, bOff, bLen, (byte) 0x87);
pos++;
len = UtilTLV.decodeLengthField(buf, pos);
pos += UtilTLV.getLengthFieldLength(len);
if(len == 2) {
key.setK(Util.getShort(buf, pos));
} else if(len == 1) {
key.setK(buf[pos]);
} else {
throw InvalidArgumentsException.getInstance();
}
}
