slowr | 60d4d10 | 2017-08-16 18:33:58 -0700 | [diff] [blame] | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
Dimitrios Mavrommatis | 96b255a | 2017-12-06 13:09:25 -0800 | [diff] [blame] | 4 | package org.onosproject.xran.asn1lib.ber.types; |
slowr | 60d4d10 | 2017-08-16 18:33:58 -0700 | [diff] [blame] | 5 | |
| 6 | import com.fasterxml.jackson.annotation.JsonIgnore; |
| 7 | import com.fasterxml.jackson.annotation.JsonValue; |
Dimitrios Mavrommatis | 96b255a | 2017-12-06 13:09:25 -0800 | [diff] [blame] | 8 | import org.onosproject.xran.asn1lib.ber.BerByteArrayOutputStream; |
| 9 | import org.onosproject.xran.asn1lib.ber.BerLength; |
| 10 | import org.onosproject.xran.asn1lib.ber.BerTag; |
| 11 | import org.onosproject.xran.asn1lib.ber.internal.Util; |
slowr | 60d4d10 | 2017-08-16 18:33:58 -0700 | [diff] [blame] | 12 | |
| 13 | import java.io.IOException; |
| 14 | import java.io.InputStream; |
| 15 | import java.io.Serializable; |
| 16 | import java.util.ArrayList; |
| 17 | import java.util.List; |
| 18 | |
| 19 | public class BerObjectIdentifier implements Serializable { |
| 20 | |
| 21 | public final static BerTag tag = new BerTag(BerTag.UNIVERSAL_CLASS, BerTag.PRIMITIVE, BerTag.OBJECT_IDENTIFIER_TAG); |
| 22 | private static final long serialVersionUID = 1L; |
Dimitrios Mavrommatis | 96b255a | 2017-12-06 13:09:25 -0800 | [diff] [blame] | 23 | |
| 24 | @JsonIgnore public byte[] code = null; |
slowr | 60d4d10 | 2017-08-16 18:33:58 -0700 | [diff] [blame] | 25 | |
| 26 | public int[] value; |
| 27 | |
| 28 | public BerObjectIdentifier() { |
| 29 | } |
| 30 | |
| 31 | public BerObjectIdentifier(byte[] code) { |
| 32 | this.code = code; |
| 33 | } |
| 34 | |
| 35 | public BerObjectIdentifier(int[] value) { |
| 36 | if ((value.length < 2) || ((value[0] == 0 || value[0] == 1) && (value[1] > 39)) || value[0] > 2) { |
| 37 | throw new IllegalArgumentException("invalid object identifier components"); |
| 38 | } |
| 39 | for (int objectIdentifierComponent : value) { |
| 40 | if (objectIdentifierComponent < 0) { |
| 41 | throw new IllegalArgumentException("invalid object identifier components"); |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | this.value = value; |
| 46 | |
| 47 | } |
| 48 | |
| 49 | public int encode(BerByteArrayOutputStream os) throws IOException { |
| 50 | return encode(os, true); |
| 51 | } |
| 52 | |
| 53 | public int encode(BerByteArrayOutputStream os, boolean withTag) throws IOException { |
| 54 | |
| 55 | if (code != null) { |
| 56 | for (int i = code.length - 1; i >= 0; i--) { |
| 57 | os.write(code[i]); |
| 58 | } |
| 59 | if (withTag) { |
| 60 | return tag.encode(os) + code.length; |
| 61 | } |
| 62 | return code.length; |
| 63 | } |
| 64 | |
| 65 | int firstSubidentifier = 40 * value[0] + value[1]; |
| 66 | |
| 67 | int subidentifier; |
| 68 | |
| 69 | int codeLength = 0; |
| 70 | |
| 71 | for (int i = (value.length - 1); i > 0; i--) { |
| 72 | |
| 73 | if (i == 1) { |
| 74 | subidentifier = firstSubidentifier; |
| 75 | } else { |
| 76 | subidentifier = value[i]; |
| 77 | } |
| 78 | |
| 79 | // get length of subidentifier |
| 80 | int subIDLength = 1; |
| 81 | while (subidentifier > (Math.pow(2, (7 * subIDLength)) - 1)) { |
| 82 | subIDLength++; |
| 83 | } |
| 84 | |
| 85 | os.write(subidentifier & 0x7f); |
| 86 | |
| 87 | for (int j = 1; j <= (subIDLength - 1); j++) { |
| 88 | os.write(((subidentifier >> (7 * j)) & 0xff) | 0x80); |
| 89 | } |
| 90 | |
| 91 | codeLength += subIDLength; |
| 92 | } |
| 93 | |
| 94 | codeLength += BerLength.encodeLength(os, codeLength); |
| 95 | |
| 96 | if (withTag) { |
| 97 | codeLength += tag.encode(os); |
| 98 | } |
| 99 | |
| 100 | return codeLength; |
| 101 | } |
| 102 | |
| 103 | public int decode(InputStream is) throws IOException { |
| 104 | return decode(is, true); |
| 105 | } |
| 106 | |
| 107 | public int decode(InputStream is, boolean withTag) throws IOException { |
| 108 | |
| 109 | int codeLength = 0; |
| 110 | |
| 111 | if (withTag) { |
| 112 | codeLength += tag.decodeAndCheck(is); |
| 113 | } |
| 114 | |
| 115 | BerLength length = new BerLength(); |
| 116 | codeLength += length.decode(is); |
| 117 | |
| 118 | if (length.val == 0) { |
| 119 | value = new int[0]; |
| 120 | return codeLength; |
| 121 | } |
| 122 | |
| 123 | byte[] byteCode = new byte[length.val]; |
| 124 | Util.readFully(is, byteCode); |
| 125 | |
| 126 | codeLength += length.val; |
| 127 | |
| 128 | List<Integer> objectIdentifierComponentsList = new ArrayList<>(); |
| 129 | |
| 130 | int subIDEndIndex = 0; |
| 131 | while ((byteCode[subIDEndIndex] & 0x80) == 0x80) { |
| 132 | if (subIDEndIndex >= (length.val - 1)) { |
| 133 | throw new IOException("Invalid Object Identifier"); |
| 134 | } |
| 135 | subIDEndIndex++; |
| 136 | } |
| 137 | |
| 138 | int subidentifier = 0; |
| 139 | for (int i = 0; i <= subIDEndIndex; i++) { |
| 140 | subidentifier |= (byteCode[i] << ((subIDEndIndex - i) * 7)); |
| 141 | } |
| 142 | |
| 143 | if (subidentifier < 40) { |
| 144 | objectIdentifierComponentsList.add(0); |
| 145 | objectIdentifierComponentsList.add(subidentifier); |
| 146 | } else if (subidentifier < 80) { |
| 147 | objectIdentifierComponentsList.add(1); |
| 148 | objectIdentifierComponentsList.add(subidentifier - 40); |
| 149 | } else { |
| 150 | objectIdentifierComponentsList.add(2); |
| 151 | objectIdentifierComponentsList.add(subidentifier - 80); |
| 152 | } |
| 153 | |
| 154 | subIDEndIndex++; |
| 155 | |
| 156 | while (subIDEndIndex < length.val) { |
| 157 | int subIDStartIndex = subIDEndIndex; |
| 158 | |
| 159 | while ((byteCode[subIDEndIndex] & 0x80) == 0x80) { |
| 160 | if (subIDEndIndex == (length.val - 1)) { |
| 161 | throw new IOException("Invalid Object Identifier"); |
| 162 | } |
| 163 | subIDEndIndex++; |
| 164 | } |
| 165 | subidentifier = 0; |
| 166 | for (int j = subIDStartIndex; j <= subIDEndIndex; j++) { |
| 167 | subidentifier |= ((byteCode[j] & 0x7f) << ((subIDEndIndex - j) * 7)); |
| 168 | } |
| 169 | objectIdentifierComponentsList.add(subidentifier); |
| 170 | subIDEndIndex++; |
| 171 | } |
| 172 | |
| 173 | value = new int[objectIdentifierComponentsList.size()]; |
| 174 | for (int i = 0; i < objectIdentifierComponentsList.size(); i++) { |
| 175 | value[i] = objectIdentifierComponentsList.get(i); |
| 176 | } |
| 177 | |
| 178 | return codeLength; |
| 179 | |
| 180 | } |
| 181 | |
Dimitrios Mavrommatis | 96b255a | 2017-12-06 13:09:25 -0800 | [diff] [blame] | 182 | |
slowr | 60d4d10 | 2017-08-16 18:33:58 -0700 | [diff] [blame] | 183 | @Override |
| 184 | public String toString() { |
| 185 | if (value == null || value.length == 0) { |
| 186 | return ""; |
| 187 | } |
| 188 | |
| 189 | String objIDString = ""; |
| 190 | objIDString += value[0]; |
| 191 | for (int i = 1; i < value.length; i++) { |
| 192 | objIDString += "." + value[i]; |
| 193 | } |
| 194 | return objIDString; |
| 195 | } |
| 196 | |
| 197 | public BerObjectIdentifier append(int value) { |
| 198 | if (this.value == null) { |
| 199 | return new BerObjectIdentifier(new int[]{value}); |
| 200 | } |
| 201 | int[] values = new int[this.value.length + 1]; |
| 202 | for (int i = 0; i < this.value.length; ++i) { |
| 203 | values[i] = this.value[i]; |
| 204 | } |
| 205 | values[values.length - 1] = value; |
| 206 | return new BerObjectIdentifier(values); |
| 207 | } |
| 208 | |
| 209 | } |