45 lines
1.8 KiB
Java
45 lines
1.8 KiB
Java
package sega.a7;
|
|
|
|
import javacard.framework.Util;
|
|
import javacard.security.MessageDigest;
|
|
|
|
public class GkeyEnc extends AuthCommand {
|
|
private static final short RECV_PACKET_SIZE = 63;
|
|
private static final byte AUTH_LEVEL = 2;
|
|
private static final short PARAM_SIZE = 62;
|
|
private static final short IV_INIT_OFFSET = 6;
|
|
private static final short DATA_OFFSET = 7;
|
|
private static final short DATA_SIZE = 16;
|
|
|
|
public GkeyEnc(short cmd, AppData data, MakePacket packet, MessageDigest sha1,
|
|
HmacSha1 hmacSha1, Crypt crypt) {
|
|
super(cmd, RECV_PACKET_SIZE, PARAM_SIZE, AUTH_LEVEL, data, packet, sha1, hmacSha1, crypt);
|
|
}
|
|
|
|
public short core(byte[] data, short dataOffset, short dataLength) {
|
|
byte ramD_ivInit = data[dataOffset + IV_INIT_OFFSET];
|
|
byte[] ramD_encData = this.m_ee_data.getGeneralBuffer_ramD();
|
|
boolean bInit = false;
|
|
if (ramD_encData.length < 48)
|
|
return AppConfig.A7_FAIL;
|
|
|
|
short ramD_decSize = decData(data, (short) (dataOffset + DATA_OFFSET), DATA_SIZE, ramD_encData,
|
|
(short) 0);
|
|
if (16 > ramD_decSize)
|
|
return AppConfig.A7_FAIL;
|
|
|
|
if (1 == ramD_ivInit)
|
|
bInit = true;
|
|
encUpdate_GKey(ramD_encData, (short) 0, (short) 16, ramD_encData, (short) 16, bInit);
|
|
short ramD_encSize = encData(ramD_encData, (short) 16, (short) 16, ramD_encData, (short) 32);
|
|
if (16 != ramD_encSize)
|
|
return AppConfig.A7_FAIL;
|
|
|
|
this.m_ramD_outDataInfo[0] = 32;
|
|
this.m_ramD_outDataInfo[1] = 16;
|
|
Util.arrayCopyNonAtomic(ramD_encData, this.m_ramD_outDataInfo[0], this.m_ramD_outData,
|
|
this.m_ramD_outDataInfo[0], this.m_ramD_outDataInfo[1]);
|
|
return AppConfig.A7_SUCCESS;
|
|
}
|
|
}
|