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57 lines
1.7 KiB
57 lines
1.7 KiB
(function (exports) {
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'use strict';
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// RFC 6844 https://tools.ietf.org/html/rfc6844#section-3
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// https://support.dnsimple.com/articles/caa-record/
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// A Certification Authority Authorization (CAA) record is used to specify which
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// certificate authorities (CAs) are allowed to issue certificates for a domain.
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// Value Meaning/Use
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//
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// Flag An unsigned integer between 0-255.
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// It is currently used to represent the critical flag, that has a
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// specific meaning per RFC 6844
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// Tag An ASCII string that represents the identifier of the property
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// represented by the record.
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// Value The value associated with the tag.
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// The RFC currently defines 3 available tags:
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//
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// - issue: explicity authorizes a single certificate authority to issue a
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// certificate (any type) for the hostname.
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// - issuewild: explicity authorizes a single certificate authority to issue a
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// wildcard certificate (and only wildcard) for the hostname.
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// - iodef: specifies an URL to which a certificate authority may report
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// policy violations.
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exports.DNS_PARSER_TYPE_CAA = function (ab, packet, record) {
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var data = new Uint8Array(ab);
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var i = record.rdstart;
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var flag = data[i];
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var mid = data[i + 1];
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i += 2;
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mid += i;
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var end = record.rdstart + record.rdlength;
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var tag = '';
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var value = '';
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while (i < mid) {
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tag += String.fromCharCode(data[i]);
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i += 1;
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}
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while (i < end) {
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value += String.fromCharCode(data[i]);
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i += 1;
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}
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record.flag = flag;
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record.tag = tag;
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record.value = value;
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return record;
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};
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}('undefined' !== typeof window ? window : exports));
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