On Thu, 8 Apr 2021 16:59:54 GMT, Weijun Wang <[email protected]> wrote:
>> src/java.base/share/classes/sun/security/util/DerValue.java line 225:
>>
>>> 223: DerValue(byte tag, byte[] buffer, int start, int end, boolean
>>> allowBER) {
>>> 224: if ((tag & 0x1f) == 0x1f) {
>>> 225: throw new IllegalArgumentException("Tag number 31 is not
>>> supported");
>>
>> As number 31 just means the tag is bigger than 31, Is it more accuracy by
>> using "Tag number over 30 is not supported"?
>
> Well, it's a little delicate here. Even if we support multi-byte tag one day,
> this constructor will still only be used to create a single-byte tag
> `DerValue`, and it's illegal for a single byte tag to end with 0x1f. So the
> words above is to remind people that they cannot create a tag number 31
> `DerValue` just because it seems it still fits into the 5 bits. Precisely,
> the words should be "this constructor only supports tag number between 0 and
> 30", but... I'll choose your words.
It makes sense. Your words is good to me.
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PR: https://git.openjdk.java.net/jdk/pull/3391
