38 lines
1.4 KiB
Java
38 lines
1.4 KiB
Java
package sega.a7;
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import javacard.framework.Util;
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import javacard.security.MessageDigest;
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import javacard.security.RandomData;
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public class RanGet extends AuthCommand {
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private static final short RECV_PACKET_SIZE = 46;
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private static final byte AUTH_LEVEL = 2;
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private static final short PARAM_SIZE = 62;
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private static final short RAN_SIZE = 16;
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private RandomData m_ee_rand;
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public RanGet(short cmd, AppData data, MakePacket packet, MessageDigest sha1, HmacSha1 hmacSha1, Crypt crypt,
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RandomData rand) {
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super(cmd, RECV_PACKET_SIZE, PARAM_SIZE, AUTH_LEVEL, data, packet, sha1, hmacSha1, crypt);
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this.m_ee_rand = rand;
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}
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public short core(byte[] data, short dataOffset, short dataLength) {
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byte[] ramD_ranData = this.m_ee_data.getGeneralBuffer_ramD();
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if (ramD_ranData.length < 32)
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return AppConfig.A7_FAIL;
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this.m_ee_rand.generateData(ramD_ranData, (short) 0, RAN_SIZE);
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short ramD_encSize = encData(ramD_ranData, (short) 0, RAN_SIZE, ramD_ranData, RAN_SIZE);
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if (ramD_encSize != 16)
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return AppConfig.A7_FAIL;
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this.m_ramD_outDataInfo[0] = RAN_SIZE;
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this.m_ramD_outDataInfo[1] = ramD_encSize;
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Util.arrayCopyNonAtomic(ramD_ranData, this.m_ramD_outDataInfo[0], this.m_ramD_outData,
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this.m_ramD_outDataInfo[0], this.m_ramD_outDataInfo[1]);
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return AppConfig.A7_SUCCESS;
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}
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}
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