35 lines
1.3 KiB
Java
35 lines
1.3 KiB
Java
package sega.a7;
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import javacard.security.MessageDigest;
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public class GkeyWrite extends AuthCommand {
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private static final short RECV_PACKET_SIZE = 78;
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private static final byte AUTH_LEVEL = 2;
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private static final short PARAM_SIZE = 46;
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public GkeyWrite(short cmd, AppData data, MakePacket packet, MessageDigest sha1, HmacSha1 hmacSha1, Crypt crypt) {
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super(cmd, RECV_PACKET_SIZE, PARAM_SIZE, AUTH_LEVEL, data, packet, sha1, hmacSha1, crypt);
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}
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public short core(byte[] data, short dataOffset, short dataLength) {
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if (this.m_ee_data.getSflag_ee())
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return AppConfig.A7_EEPWRITE_DISABLE;
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short ramD_dataSize = AppConfig.AES_KEY_SIZE + AppConfig.AES_IV_SIZE;
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byte[] ramD_newGKey = this.m_ee_data.getGeneralBuffer_ramD();
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if (ramD_newGKey.length < (short) ramD_dataSize)
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return AppConfig.A7_FAIL;
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short ramD_decSize = decData(data, (short) (dataOffset + 6), ramD_dataSize, ramD_newGKey, (short) 0);
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if (ramD_decSize < 32)
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return AppConfig.A7_FAIL;
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if (!changeGKey_ee(ramD_newGKey, (short) 0, AppConfig.AES_KEY_SIZE, ramD_newGKey, AppConfig.AES_KEY_SIZE,
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AppConfig.AES_IV_SIZE))
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return AppConfig.A7_EEP_WRITEFAIL;
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return AppConfig.A7_SUCCESS;
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}
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}
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