sydapi-java-sge-database/src/main/java/com/sunyard/sge/database/SydSM3.java

package com.sunyard.sge.database;


import com.sunyard.SydApiException;

public class SydSM3 implements ISM3 {
    private boolean is_finished = false;
    private SydApi api;
    private byte[] pcProcData;

    public SydSM3(SydApi sydApi) {
        this.api = sydApi;
    }

    public void update(byte[] pcData) {
        if (is_finished) {
            throw new SydApiException(0x8007);
        }
        if (null == pcData || 0 == pcData.length) {
            pcData = new byte[0];
        }
        if (pcData.length > 4064) {
            throw new IllegalArgumentException();
        }
        if (null == this.pcProcData) {
            LongDataReturn<byte[], byte[]> stringStringLongDataReturn = api.SYD_SM3_Hash_LongData(pcData, 1, null);
            this.pcProcData = stringStringLongDataReturn.getProcData();
        } else {
            LongDataReturn<byte[], byte[]> stringStringLongDataReturn = api.SYD_SM3_Hash_LongData(pcData, 2, pcProcData);
            this.pcProcData = stringStringLongDataReturn.getProcData();
        }
    }

    public byte[] digest() {
        if (is_finished) {
            throw new SydApiException(0x8007);
        }
        this.is_finished = true;
        if (null == pcProcData) {
            LongDataReturn<byte[], byte[]> stringStringLongDataReturn = api.SYD_SM3_Hash_LongData(new byte[0], 0, null);
            return stringStringLongDataReturn.getData();
        } else {
            LongDataReturn<byte[], byte[]> stringStringLongDataReturn = api.SYD_SM3_Hash_LongData(new byte[0], 3, pcProcData);
            return stringStringLongDataReturn.getData();
        }
    }
}