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(NO_SUCH_ALGORITHM)，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。我得出的结论是我不知道如何与 ECDSA 签约，我想知道这一点。
这是我的完整源代码
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;
}
}
而APDU命令如下
[ Card ] <== 00A4040007D4106509900090
[ Card ] ==> 9000
[ Card ] <== 0046000000
[ Card ] ==> 0003
我的开发环境如下。
我已经更改了我的代码来设置域参数。但是卡仍然输出相同的结果(0x0003)。这是我的完整源代码。
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;
}
}
最佳答案
Java Card 中没有默认的 EC 域参数。需要使用设置了域参数的 KeyPair 和 ECPublicKey 创建 ECPrivateKey(因此点 W 和 secret S 可以保持为空)。之后可以调用 genKeyPair() ，至少如果卡支持 F(2m) 或 F(p) 椭圆曲线加密和指定的 key 大小。
添加
请注意，恩智浦 JCOP 芯片可能需要为公钥和私钥设置这些参数。参数应具有 key 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 )应该只有值 1。
请注意，只有带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/配置都是相同的。有关详细信息，请联系您的供应商。
关于java - Javacard 中的 ECDSA 签名，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24467612/