blob: d9f185168f96e50f2820a4bfc24f853c4739a8da (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
package model.asn1;
import model.asn1.exceptions.ParseException;
import model.asn1.parsing.BytesReader;
/**
* Represents the ASN.1 BOOLEAN type. It always has one byte length. Its content is either 0xFF (true) or 0x00 (false).
*/
public class Bool extends ASN1Object {
/**
* The X.680 universal class tag assignment.
*/
public static final Tag TAG = new Tag(TagClass.UNIVERSAL, false, 0x1);
private final boolean value;
/**
* EFFECTS: Initiate the BOOLEAN with the given tag, an optional context-specific tag number for explicit
* encoding, and its value. For more information, consult {@link ASN1Object}.
* REQUIRES: Consult {@link ASN1Object}.
*/
public Bool(Tag tag, Tag parentTag, boolean value) {
super(tag, parentTag);
this.value = value;
}
/**
* EFFECTS: Parse input bytes. For more information on tags parsing, consult {@link ASN1Object}.
* Throws {@link ParseException} if the input data is invalid:
* - The length is not 1
* - The value is neither 0x00 nor 0xFF
* - Other cases as denoted in {@link ASN1Object}
*/
public Bool(BytesReader encoded, boolean hasParentTag) throws ParseException {
super(encoded, hasParentTag);
if (getLength() != 1) {
throw new ParseException("Invalid boolean length: " + getLength());
}
final Byte val = encoded.require(1, true)[0];
if (val == 0) {
this.value = false;
} else if (val == -1) {
this.value = true;
} else {
throw new ParseException("Unknown boolean value: " + val);
}
}
/**
* EFFECTS: Encode the boolean to either 0x00 or 0xFF.
*/
@Override
public Byte[] encodeValueDER() {
return new Byte[]{ value ? (byte) -1 : 0 };
}
public boolean getValue() {
return value;
}
}
|
