100 lines
3.9 KiB
Java
100 lines
3.9 KiB
Java
package com.cscn;
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import javacard.framework.APDU;
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import javacard.framework.ISO7816;
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import javacard.framework.ISOException;
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import javacard.framework.JCSystem;
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import javacard.framework.Util;
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/**
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* 仅做一次“自检调用”：
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* 1) ctx.init(KEY, IV); Enc(Input) == EncExpected ?
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* 2) ctx.init(KEY, IV); Enc(Enc(Input)) == Input ?
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* Response: 2字节 [encMatch, dblEncRestored]，1=真，0=假
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*/
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public final class Method {
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// ======= 已按你提供的数据填充 =======
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// Key: 32字节
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private static final byte[] KEY32 = new byte[] {
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(byte)0x30,(byte)0x31,(byte)0x32,(byte)0x33,(byte)0x34,(byte)0x35,(byte)0x36,(byte)0x37,
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(byte)0x38,(byte)0x39,(byte)0x61,(byte)0x62,(byte)0x63,(byte)0x64,(byte)0x65,(byte)0x66,
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(byte)0x30,(byte)0x31,(byte)0x32,(byte)0x33,(byte)0x34,(byte)0x35,(byte)0x36,(byte)0x37,
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(byte)0x38,(byte)0x39,(byte)0x61,(byte)0x62,(byte)0x63,(byte)0x64,(byte)0x65,(byte)0x66
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};
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// IV: 你提供的是23字节（如需25字节请补齐两字节）
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private static final byte[] IV25 = new byte[] {
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(byte)0x30,(byte)0x31,(byte)0x32,(byte)0x33,(byte)0x34,(byte)0x35,(byte)0x36,(byte)0x37,
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(byte)0x38,(byte)0x39,(byte)0x61,(byte)0x62,(byte)0x63,(byte)0x64,(byte)0x65,(byte)0x66,
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(byte)0x67,(byte)0xC3,(byte)0x1C,(byte)0xB3,(byte)0xD3,(byte)0x5D,(byte)0xB7
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};
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// Input: 明文（38字节）
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private static final byte[] INPUT = new byte[] {
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(byte)0x5A,(byte)0x55,(byte)0x43,(byte)0x32,(byte)0x35,(byte)0x36,(byte)0xE5,(byte)0xAF,
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(byte)0xB9,(byte)0xE7,(byte)0xA7,(byte)0xB0,(byte)0xE5,(byte)0x8A,(byte)0xA0,(byte)0xE8,
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(byte)0xA7,(byte)0xA3,(byte)0xE5,(byte)0xAF,(byte)0x86,(byte)0xE6,(byte)0xB5,(byte)0x8B,
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(byte)0xE8,(byte)0xAF,(byte)0x95,(byte)0x3A,(byte)0x31,(byte)0x32,(byte)0x33,(byte)0x34,
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(byte)0x35,(byte)0x36,(byte)0x37,(byte)0x38,(byte)0x39,(byte)0x30
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};
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// EncResult: 期望密文（38字节）
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private static final byte[] ENC_EXPECTED = new byte[] {
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(byte)0x6C,(byte)0xEE,(byte)0x3C,(byte)0xFA,(byte)0xDE,(byte)0xBB,(byte)0xCB,(byte)0xE5,
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(byte)0x33,(byte)0x51,(byte)0x07,(byte)0x07,(byte)0x90,(byte)0x25,(byte)0x93,(byte)0x27,
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(byte)0x94,(byte)0xF5,(byte)0x18,(byte)0x70,(byte)0xEF,(byte)0x71,(byte)0x72,(byte)0x7D,
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(byte)0xBA,(byte)0x8D,(byte)0xBF,(byte)0x4F,(byte)0x61,(byte)0xC9,(byte)0xA8,(byte)0xE9,
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(byte)0xFF,(byte)0x19,(byte)0xF9,(byte)0xF9,(byte)0xE2,(byte)0xD2
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};
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// ======================================
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// 运行时缓冲：放RAM，避免写EEPROM
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private final Zuc256EncryptCtx ctx;
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public Method() {
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ctx = new Zuc256EncryptCtx(); // 仅创建一次
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}
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public void processData(APDU apdu) {
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short L = (short) INPUT.length;
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byte[] buf1; // Enc(Input)
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byte[] buf2; // Enc(Enc(Input)) -> 应为 Input
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buf1 = JCSystem.makeTransientByteArray(L, JCSystem.MEMORY_TYPE_TRANSIENT_RESET);
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buf2 = JCSystem.makeTransientByteArray(L, JCSystem.MEMORY_TYPE_TRANSIENT_RESET);
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byte[] apduBuf = apdu.getBuffer();
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// 第一次：Enc(Input)
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ctx.init(KEY32, IV25);
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Zuc256State tmpState = ctx.state;
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ctx.update(INPUT, (short) INPUT.length, buf1);
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ctx.finish(buf1); // 若 Input 长度为 4 的倍数则通常无副作用，留着更稳妥
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Zuc256State tmpState2 = ctx.state;
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boolean encMatch = (Util.arrayCompare(buf1, (short)0, ENC_EXPECTED, (short)0, (short)INPUT.length) == 0);
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// 第二次：Enc(Enc(Input)) 应还原 Input
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ctx.init(KEY32, IV25);
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ctx.update(buf1, (short) INPUT.length, buf2);
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ctx.finish(buf2);
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boolean dblOk = (Util.arrayCompare(buf2, (short)0, INPUT, (short)0, (short)INPUT.length) == 0);
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// 返回 2 字节结果：[encMatch, dblOk]，1=真, 0=假
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apduBuf[0] = (byte)(encMatch ? 1 : 0);
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apduBuf[1] = (byte)(dblOk ? 1 : 0);
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short outLen = 2;
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apdu.setOutgoing();
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apdu.setOutgoingLength(outLen);
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apdu.sendBytes((short)0, outLen);
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}
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// 本任务不需要更新Key，这里留空
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public void updateKey(APDU apdu) {
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ISOException.throwIt(ISO7816.SW_FUNC_NOT_SUPPORTED);
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}
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}
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