From 954e5fb637389e1294408a2c6304a967ffa93e44 Mon Sep 17 00:00:00 2001
From: cheney <cbed@163.com>
Date: Thu, 21 Jul 2022 16:26:54 +0800
Subject: [PATCH] =?UTF-8?q?sm4=20=E9=95=BF=E6=95=B0=E6=8D=AE=E9=80=9F?=
 =?UTF-8?q?=E4=BC=A0=E6=8E=A5=E5=8F=A3?=
MIME-Version: 1.0
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---
 .../java/racal/sunyard/main/SydApi4j.java     | 89 ++++++++++++++++++-
 1 file changed, 87 insertions(+), 2 deletions(-)

diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index e44699a..cc078de 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -35,6 +35,15 @@ import java.util.*;
 
 public class SydApi4j implements SydApi {
 
+    // 数据包长度
+    private final int MaxDataLenEachPack = 4064;
+
+    // 批量数据包，单包数据长度
+    // 加密
+    private final int MaxDataLenEachBatchPackEn = 1024;
+    // 解密
+    private final int MaxDataLenEachBatchPackDe = 1040;
+
     private static boolean debug = false;
 
     private static long sTime = System.currentTimeMillis();
@@ -2062,6 +2071,82 @@ public class SydApi4j implements SydApi {
         return Util.bytes2HexString(mac);
     }
 
+    public byte[] SYD_SM4_LongData(int nAlg, String keyIndex, int fullmode, byte[] pcData, int iPkgNum) {
+
+        if ( pcData.length > MaxDataLenEachPack ) {
+            throw new IllegalArgumentException("单包数据超长");
+        }
+
+        ByteBuffer bb = ByteBuffer.allocate(10 * 1024);
+        PacketSN sn = PacketSN.gen();
+        bb.put( new byte[2] );
+        bb.put( sn.getSn().array() );
+        bb.put( "E0".getBytes() );
+        bb.put( (byte) (0x30 + iPkgNum) );      // 包序号
+        bb.put( (byte) ( 0x30 + nAlg) ); // 密钥模式
+        bb.put( (byte) ( 0x31) );        // ECB
+        bb.put( (byte) ( 0x30) );        // ZEK
+
+        // 填充密钥
+        bb.put( keyIndex.getBytes() );
+
+        bb.put( (byte) ( 0x30) );        // 输入消息类型二进制
+        bb.put( (byte) ( 0x30) );        // 输出消息类型二进制
+
+        bb.put( (byte) ( 0x30 + fullmode) );        // 填充模式
+        bb.put( "0000".getBytes() );                // 填充字符
+        bb.put( (byte) ( 0x32) );                   // 填充类型
+
+        // iv 暂未支持
+        // P 长度暂未支持
+
+
+        // 填充消息数据长度
+        bb.put( String.format("%03X", pcData.length).getBytes() );
+
+        // 填充多个消息数据
+        bb.put( pcData );
+
+        // 重新计算长度
+        int len = bb.position();
+        len -= 2;
+        byte[] lenArray = new byte[ 2 ];
+        lenArray[0] = (byte)((len >> 8) & 0xFF);
+        lenArray[1] = (byte)( len & 0xFF);
+
+        bb.put( 0, (byte)((len >> 8) & 0xFF) );
+        bb.put( 1, (byte)( len & 0xFF) );
+
+        // 通信
+        synchronized (this) {
+            // 响应解析
+            bb = syncRead(syncSend(bb));
+        }
+
+        bb.flip();
+        bb.position( 12 );
+        byte[] code = new byte[2];
+        bb.get( code );
+
+        int retCode = Integer.valueOf( new String( code ) );
+        if ( 0 != retCode ) {
+            throw new SydApiException( retCode );
+        }
+
+        // 跳过输出模式
+        bb.get();
+
+        // 获取长度
+        byte[] iLenArray = new byte[3];
+        bb.get( iLenArray );
+        int ilen = Integer.valueOf( new String( iLenArray ), 16 );
+
+        // 获取长度的数据
+        byte[] d = new byte[ ilen ];
+        bb.get(d);
+        return d;
+    }
+
     public List<byte[]> SYMEncryptDecryptBatchData(int nAlg, String[] seesionKey, int fullmode, List<byte[]> pINdata) {
 
         int batchSize = pINdata.size();
@@ -2077,14 +2162,14 @@ public class SydApi4j implements SydApi {
             // 解密
             for ( byte[]d : pINdata ) {
                 if ( d.length > 1040 ) {
-                    throw new IllegalArgumentException("批量单数数据超长 1040");
+                    throw new IllegalArgumentException("批量单数据超长 1040");
                 }
             }
         } else {
             // 加密
             for ( byte[]d : pINdata ) {
                 if ( d.length > 1024 ) {
-                    throw new IllegalArgumentException("批量单数数据超长 1024");
+                    throw new IllegalArgumentException("批量单数据超长 1024");
                 }
             }
         }