1 /* 2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. 3 * Please refer to the LICENSE.txt for licensing details. 4 */ 5 package ch.ethz.ssh2.packets; 6 7 import java.io.UnsupportedEncodingException; 8 import java.math.BigInteger; 9 10 import ch.ethz.ssh2.util.StringEncoder; 11 12 /** 13 * TypesWriter. 14 * 15 * @author Christian Plattner 16 * @version 2.50, 03/15/10 17 */ 18 public class TypesWriter 19 { 20 byte arr[]; 21 int pos; 22 23 public TypesWriter() 24 { 25 arr = new byte[256]; 26 pos = 0; 27 } 28 29 private void resize(int len) 30 { 31 byte new_arr[] = new byte[len]; 32 System.arraycopy(arr, 0, new_arr, 0, arr.length); 33 arr = new_arr; 34 } 35 36 public int length() 37 { 38 return pos; 39 } 40 41 public byte[] getBytes() 42 { 43 byte[] dst = new byte[pos]; 44 System.arraycopy(arr, 0, dst, 0, pos); 45 return dst; 46 } 47 48 public void getBytes(byte dst[]) 49 { 50 System.arraycopy(arr, 0, dst, 0, pos); 51 } 52 53 public void writeUINT32(int val, int off) 54 { 55 if ((off + 4) > arr.length) 56 resize(off + 32); 57 58 arr[off++] = (byte) (val >> 24); 59 arr[off++] = (byte) (val >> 16); 60 arr[off++] = (byte) (val >> 8); 61 arr[off++] = (byte) val; 62 } 63 64 public void writeUINT32(int val) 65 { 66 writeUINT32(val, pos); 67 pos += 4; 68 } 69 70 public void writeUINT64(long val) 71 { 72 if ((pos + 8) > arr.length) 73 resize(arr.length + 32); 74 75 arr[pos++] = (byte) (val >> 56); 76 arr[pos++] = (byte) (val >> 48); 77 arr[pos++] = (byte) (val >> 40); 78 arr[pos++] = (byte) (val >> 32); 79 arr[pos++] = (byte) (val >> 24); 80 arr[pos++] = (byte) (val >> 16); 81 arr[pos++] = (byte) (val >> 8); 82 arr[pos++] = (byte) val; 83 } 84 85 public void writeBoolean(boolean v) 86 { 87 if ((pos + 1) > arr.length) 88 resize(arr.length + 32); 89 90 arr[pos++] = v ? (byte) 1 : (byte) 0; 91 } 92 93 public void writeByte(int v, int off) 94 { 95 if ((off + 1) > arr.length) 96 resize(off + 32); 97 98 arr[off] = (byte) v; 99 } 100 101 public void writeByte(int v) 102 { 103 writeByte(v, pos); 104 pos++; 105 } 106 107 public void writeMPInt(BigInteger b) 108 { 109 byte raw[] = b.toByteArray(); 110 111 if ((raw.length == 1) && (raw[0] == 0)) 112 writeUINT32(0); /* String with zero bytes of data */ 113 else 114 writeString(raw, 0, raw.length); 115 } 116 117 public void writeBytes(byte[] buff) 118 { 119 writeBytes(buff, 0, buff.length); 120 } 121 122 public void writeBytes(byte[] buff, int off, int len) 123 { 124 if ((pos + len) > arr.length) 125 resize(arr.length + len + 32); 126 127 System.arraycopy(buff, off, arr, pos, len); 128 pos += len; 129 } 130 131 public void writeString(byte[] buff, int off, int len) 132 { 133 writeUINT32(len); 134 writeBytes(buff, off, len); 135 } 136 137 public void writeString(String v) 138 { 139 byte[] b = StringEncoder.GetBytes(v); 140 141 writeUINT32(b.length); 142 writeBytes(b, 0, b.length); 143 } 144 145 public void writeString(String v, String charsetName) throws UnsupportedEncodingException 146 { 147 byte[] b = (charsetName == null) ? StringEncoder.GetBytes(v) : v.getBytes(charsetName); 148 149 writeUINT32(b.length); 150 writeBytes(b, 0, b.length); 151 } 152 153 public void writeNameList(String v[]) 154 { 155 StringBuilder sb = new StringBuilder(); 156 for (int i = 0; i < v.length; i++) 157 { 158 if (i > 0) 159 sb.append(','); 160 sb.append(v[i]); 161 } 162 writeString(sb.toString()); 163 } 164 } 165
