asn1 length about der-parser HOT 4 CLOSED

It depends if you need to get the integer, or want to access the bytes.

The integer can be obtained using the as_u32() method (but will return an error if the integer is greater than 2^32) or as_bigint()

If you need to access the raw vector, you need to match the object content, either using a match or a let if:

if let DerObjectContent::Sequence(ref v) = der_obj.content {
  // use v
}

or

match der_obj.content {
  DerObjectContent::Integer(ref v) => { // use v
  },
  _ => (),
}

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Hi,

The length is not stored (because the header is not kept after reading fields) currently. What is your use case ? Copying it or storing the header would not be difficult, but it would require to change the API

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I developed a method to infer the size, so it is not needed. However, how I would access the content (vec) from the DerObject below?

DerObject { class: 0, structured: 0, tag: 2, content: Integer([0, 1, 2 ,3 4, 5]) }

from der-parser.

Thank your for the explanation

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