Javacard中的javaecdsa签名
我正在Javacard中使用ECDSA实现签名代码
我的代码在异常部分输出0x0003（没有这样的算法），这意味着该卡不支持该算法。我不明白，因为我的供应商告诉我它支持ECC。我的结论是我不知道如何与ECDSA签约，我想知道这一点
这是我的全部源代码
package MyECDSA;
import javacard.framework.*;
import javacard.security.*;
import javacardx.crypto.*;
public class MyECDSA extends Applet{
private byte[] PLAINTEXT ;
private ECPrivateKey objECDSAPriKey=null; // Object for ECDSA Private Key
private ECPublicKey objECDSAPubKey=null; // Object for ECDSA Public Key
private KeyPair objECDSAKeyPair=null; // Object for ECDSA Key Pair
private Signature objECDSASign=null; // Object for ECDSA Signature
final static short BAS = 0;
public static void install(byte[] bArray, short bOffset, byte bLength){
new MyECDSA(bArray, bOffset, bLength);
}
private MyECDSA(byte bArray[], short bOffset, byte bLength){
PLAINTEXT = new byte[0x100] ; // Data file
Util.arrayFillNonAtomic(PLAINTEXT, BAS, (short)0x100, (byte)0);
register();
}
//======================================================================================
public void process(APDU apdu){
byte buf[] = apdu.getBuffer();
switch(buf[1])
{
//--------------------------------------------------------
case (byte)0xA4: break;
case (byte)0x46:
// Create ECDSA Keys and Pair
try {
// <<<<<<<<<<<<<<<< Here is the problem >>>>>>>>>>>>>>>>>
objECDSAKeyPair = new KeyPair(KeyPair.ALG_EC_FP, KeyBuilder.LENGTH_EC_FP_192);
//objECDSAKeyPair = new KeyPair(KeyPair.ALG_EC_F2M, KeyBuilder.LENGTH_EC_F2M_193);
}
catch(CryptoException c)
{
short reason = c.getReason();
ISOException.throwIt(reason);
}
ISOException.throwIt((short)0x9999); // for check
// Generate Key pair
objECDSAKeyPair.genKeyPair();
// Create Signature Object
objECDSASign = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
objECDSAPriKey = (ECPrivateKey)objECDSAKeyPair.getPrivate();
objECDSAPubKey = (ECPublicKey)objECDSAKeyPair.getPublic();
break;
case (byte)0x2E:
short Le = apdu.setOutgoing();
short sSignLen=0 ;
// Init with Private Key
objECDSASign.init(objECDSAPriKey, Signature.MODE_SIGN);
// Sign Data
sSignLen = objECDSASign.sign(PLAINTEXT, BAS, Le, buf, BAS);
apdu.setOutgoingLength(sSignLen);
apdu.sendBytes(BAS, sSignLen);
break;
//--------------------------------------------------------
default:
ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
}
return;
}
}
APDU命令如下所示
[ Card ] <== 00A4040007D4106509900090
[ Card ] ==> 9000
[ Card ] <== 0046000000
[ Card ] ==> 0003
我的开发环境如下
- 操作系统：Windows7
- JCDK第2.2.1版
- JDK 1.4.2版
- 晶片：NXP
- 终端：ACR122 NFC非接触式智能卡读卡器
我已更改代码以设置域参数。但卡仍然输出相同的结果（0x0003）。这是我的全部源代码
package MyECDSA;
import javacard.framework.*;
import javacard.security.*;
import javacardx.crypto.*;
public class MyECDSA extends Applet{
private byte[] PLAINTEXT ;
private ECPrivateKey objECDSAPriKey=null; // Object for ECDSA Private Key
private ECPublicKey objECDSAPubKey=null; // Object for ECDSA Public Key
private KeyPair objECDSAKeyPair=null; // Object for ECDSA Key Pair
private Signature objECDSASign=null; // Object for ECDSA Signature
final static short BAS = 0;
final static byte[] SecP192r1_P = { // 24
(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,
(byte)0xFE,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,
(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF};
final static byte[] SecP192r1_A = { // 24
(byte)0xFC,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,
(byte)0xFE,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,
(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF};
final static byte[] SecP192r1_B = { // 24
(byte)0xB1,(byte)0xB9,(byte)0x46,(byte)0xC1,(byte)0xEC,(byte)0xDE,(byte)0xB8,(byte)0xFE,
(byte)0x49,(byte)0x30,(byte)0x24,(byte)0x72,(byte)0xAB,(byte)0xE9,(byte)0xA7,(byte)0x0F,
(byte)0xE7,(byte)0x80,(byte)0x9C,(byte)0xE5,(byte)0x19,(byte)0x05,(byte)0x21,(byte)0x64};
final static byte[] SecP192r1_S = { // 20
(byte)0xD5,(byte)0x96,(byte)0x21,(byte)0xE1,(byte)0xEA,(byte)0x20,(byte)0x81,(byte)0xD3,
(byte)0x28,(byte)0x95,(byte)0x57,(byte)0xED,(byte)0x64,(byte)0x2F,(byte)0x42,(byte)0xC8,
(byte)0x6F,(byte)0xAE,(byte)0x45,(byte)0x30};
final static byte[] SecP192r1_G = { // 25
(byte)0x12,(byte)0x10,(byte)0xFF,(byte)0x82,(byte)0xFD,(byte)0x0A,(byte)0xFF,(byte)0xF4,
(byte)0x00,(byte)0x88,(byte)0xA1,(byte)0x43,(byte)0xEB,(byte)0x20,(byte)0xBF,(byte)0x7C,
(byte)0xF6,(byte)0x90,(byte)0x30,(byte)0xB0,(byte)0x0E,(byte)0xA8,(byte)0x8D,(byte)0x18,(byte)0x03};
final static byte[] SecP192r1_N = { // 24
(byte)0x31,(byte)0x28,(byte)0xD2,(byte)0xB4,(byte)0xB1,(byte)0xC9,(byte)0x6B,(byte)0x14,
(byte)0x36,(byte)0xF8,(byte)0xDE,(byte)0x99,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,
(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF};
final static short SecP192r1_H = 1;
//======================================================================================
public static void install(byte[] bArray, short bOffset, byte bLength){
new MyECDSA(bArray, bOffset, bLength);
}
private MyECDSA(byte bArray[], short bOffset, byte bLength){
PLAINTEXT = new byte[0x100] ; // Data file
Util.arrayFillNonAtomic(PLAINTEXT, BAS, (short)0x100, (byte)0);
register();
}
//======================================================================================
public void process(APDU apdu){
byte buf[] = apdu.getBuffer();
switch(buf[1])
{
//--------------------------------------------------------
case (byte)0xA4: break;
case (byte)0x46:
// Create ECDSA Keys and Pair
try {
// <<<<<<<<<<<<<<<< Here is the problem >>>>>>>>>>>>>>>>>
objECDSAPriKey = (ECPrivateKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PRIVATE, KeyBuilder.LENGTH_EC_FP_192, false);
ISOException.throwIt((short)0x8888); // for check
objECDSAPubKey = (ECPublicKey)KeyBuilder.buildKey(KeyBuilder.TYPE_EC_FP_PUBLIC, KeyBuilder.LENGTH_EC_FP_192, false);
// set EC Domain Parameters
objECDSAPubKey.setFieldFP(SecP192r1_P, BAS, (short)24);
objECDSAPubKey.setA(SecP192r1_A, BAS, (short)24);
objECDSAPubKey.setB(SecP192r1_B, BAS, (short)24);
objECDSAPubKey.setG(SecP192r1_G, BAS, (short)25);
objECDSAPubKey.setK(SecP192r1_H);
objECDSAPubKey.setR(SecP192r1_N, BAS, (short)24);
objECDSAKeyPair = new KeyPair(KeyPair.ALG_EC_FP, KeyBuilder.LENGTH_EC_FP_192);
}
catch(CryptoException c)
{
short reason = c.getReason();
ISOException.throwIt(reason); // for check
}
// On-Card Key Generation Process
objECDSAKeyPair.genKeyPair();
// Obtain Key References
objECDSAPriKey = (ECPrivateKey)objECDSAKeyPair.getPrivate();
objECDSAPubKey = (ECPublicKey)objECDSAKeyPair.getPublic();
// Create Signature Object
objECDSASign = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
break;
case (byte)0x2E:
short Le = apdu.setOutgoing();
short sSignLen=0 ;
// Init with Private Key
objECDSASign.init(objECDSAPriKey, Signature.MODE_SIGN);
// Sign Data
sSignLen = objECDSASign.sign(PLAINTEXT, BAS, Le, buf, BAS);
apdu.setOutgoingLength(sSignLen);
apdu.sendBytes(BAS, sSignLen);
break;
//--------------------------------------------------------
default:
ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
}
return;
}
}
# 1 楼答案
如果尝试创建特定算法的实例（在您的情况下为KeyPair.ALG_EC_FP&；KeyBuilder.LENGTH_EC_FP_192）失败且没有此类算法，则您的卡不完全支持该算法（例如，旧硬件）或将其禁用
Project JCAlgTester允许您获取特定卡支持的算法的完整列表。多张不同卡片的结果数据库也可用（但最好通过上传JCAlgTester小程序直接检查您的特定卡片）
# 2 楼答案
Java卡中没有默认的EC域参数。需要使用为其设置域参数的
ECPublicKey和ECPrivateKey创建KeyPair（因此点W和秘密S可能保持为空）。之后可以调用genKeyPair()，至少如果卡支持F（2m）或F（p）椭圆曲线加密以及指定的密钥大小增加
请注意，NXP JCOP芯片可能需要为公共和私有密钥设置这些参数。参数应具有密钥大小（对于单独的值）或未压缩的椭圆曲线点。问题中G的值似乎是一个压缩点。只有辅助因子（对于
setH）的值才应该是1注意，只有具有非对称协处理器的芯片才能支持椭圆曲线；并非所有卡的创建/配置都相同。有关详细信息，请与您的供应商联系