Yet another ASN.1 encoder/decoder in JavaScript. Parses a binary ASN.1 buffer into a JavaScript object that describes the ASN.1 structure. Nested elements form a tree, and hence the name "asn1-tree", and a primitive value would just result in an object.
This is just an encoder/decoder. The interpretation of the structure (i.e. matching against a schema) is beyond the scope of this library. See asn1-mapper, an ASN.1 schema mapper, for that purpose.
npm install --save asn1-tree
const asn1Tree = require('asn1-tree');
const buffer = Buffer.from('3080800803221200644241f40201028301010000', 'hex');
const element = asn1Tree.decode(buffer);
The value of element will be:
{
cls: 0,
form: 1,
tagCode: 16,
elements: [{
cls: 2,
form: 0,
tagCode: 0,
value: Buffer.from([ 3, 34, 18, 0, 100, 66, 65, 244 ])
}, {
cls: 0,
form: 0,
tagCode: 2,
value: Buffer.from([ 2 ])
}, {
cls: 2,
form: 0,
tagCode: 3,
value: Buffer.from([ 1 ])
}]
}
Going back:
const buffer = asn1Tree.encode(element);
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