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Fix CHOICE DER support

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This commit is contained in:
Camden Dixie O'Brien 2025-02-25 21:58:39 +00:00
parent 18541786e1
commit 10560371ab
2 changed files with 6 additions and 5 deletions
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7
client/src/der.vala
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@ -48,7 +48,7 @@ namespace StudySystemClient.Der {
private static Datum decode_datum(uint8 type, uint8[] content)
throws DecodeError {
if ((type & 0xc0) == Choice.BASE_TYPE)
if ((type & ~Choice.ID_MASK) == Choice.BASE_TYPE)
return new Choice.from_content(type, content);
switch (type) {
case Boolean.TYPE:
@ -266,7 +266,8 @@ namespace StudySystemClient.Der {
}
public class Choice : Datum {
internal const uint8 BASE_TYPE = 0x80;
internal const uint8 BASE_TYPE = 0xa0;
internal const uint8 ID_MASK = 0x1f;
public int id { get; private set; }
public Datum value { get; private set; }
@ -282,7 +283,7 @@ namespace StudySystemClient.Der {
throws DecodeError {
this.type = type;
content = bytes;
id = type & 0x3f;
id = type & ID_MASK;
value = decode(bytes);
}
}

4
client/tests/der_tests.vala
View File

@ -175,7 +175,7 @@ void main(string[] args) {
Test.add_func("/encode/choice/1:foo", () => {
var choice = new Der.Choice(1, new Utf8String("foo"));
var expected = new uint8[] {
0x81, 0x05, 0x0c, 0x03, 0x66, 0x6f, 0x6f
0xa1, 0x05, 0x0c, 0x03, 0x66, 0x6f, 0x6f
};
test_encode(choice, expected);
});
@ -266,7 +266,7 @@ void main(string[] args) {
Test.add_func("/decode/choice/1:foo", () => {
var expected_id = 1;
var bytes = new uint8[] {
0x81, 0x05, 0x0c, 0x03, 0x66, 0x6f, 0x6f
0xa1, 0x05, 0x0c, 0x03, 0x66, 0x6f, 0x6f
};
Der.Choice choice;
try {