74 lines
2.0 KiB
JavaScript
74 lines
2.0 KiB
JavaScript
'use strict'
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const findNameStart = require('./find-name-start')
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const findNameEnd = require('./find-name-end')
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const isValidAttributeTypeName = require('./is-valid-attribute-type-name')
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const readAttributeValue = require('./read-attribute-value')
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/**
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* @typedef {object} AttributePair
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* @property {string | import('@ldapjs/asn1').BerReader} name Property name is
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* actually the property name of the attribute pair. The value will be a string,
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* or, in the case of the value being a hex encoded string, an instance of
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* `BerReader`.
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*
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* @example
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* const input = 'foo=bar'
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* const pair = { foo: 'bar' }
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*/
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/**
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* @typedef {object} ReadAttributePairResult
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* @property {number} endPos The ending position in the input search buffer that
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* is the end of the read attribute pair.
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* @property {AttributePair} pair The parsed attribute pair.
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*/
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/**
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* Read an RDN attribute type and attribute value pair from the provided
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* search buffer at the given starting position.
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*
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* @param {Buffer} searchBuffer
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* @param {number} startPos
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*
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* @returns {ReadAttributePairResult}
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*
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* @throws When there is some problem with the input string.
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*/
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module.exports = function readAttributePair ({ searchBuffer, startPos }) {
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let pos = startPos
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const nameStartPos = findNameStart({
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searchBuffer,
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startPos: pos
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})
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if (nameStartPos < 0) {
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throw Error('invalid attribute name leading character encountered')
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}
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const nameEndPos = findNameEnd({
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searchBuffer,
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startPos: nameStartPos
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})
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if (nameStartPos < 0) {
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throw Error('invalid character in attribute name encountered')
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}
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const attributeName = searchBuffer.subarray(nameStartPos, nameEndPos).toString('utf8')
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if (isValidAttributeTypeName(attributeName) === false) {
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throw Error('invalid attribute type name: ' + attributeName)
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}
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const valueReadResult = readAttributeValue({
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searchBuffer,
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startPos: nameEndPos
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})
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pos = valueReadResult.endPos
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const attributeValue = valueReadResult.value
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return {
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endPos: pos,
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pair: { [attributeName]: attributeValue }
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}
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}
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