@li0ard/tsemrtd/dist/sod.js

simple library for eMRTD. supports browsers, node, bun and more!

import { TLV } from "@li0ard/tinytlv";
import { Enums } from "./index";
import { AsnConvert, OctetString } from "@peculiar/asn1-schema";
import { LDSObject } from "./asn1/sod";
import { ContentInfo, SignedData } from "@peculiar/asn1-cms";
/**
 * Class for working with SOD (Security object)
*/
export class SOD {
    /**
     * Get version, algorithm, data groups hashes
     * @param data Data of EF.SOD file
     */
    static load(data) {
        let tlv = TLV.parse(data);
        if (parseInt(tlv.tag, 16) != Enums.TAGS.SOD)
            throw new Error(`Invalid SOD tag "0x${tlv.tag}", expected 0x${Enums.TAGS.SOD.toString(16)}`);
        let contentInfo = AsnConvert.parse(tlv.byteValue, ContentInfo);
        let signedData = AsnConvert.parse(contentInfo.content, SignedData);
        let sod = AsnConvert.parse(signedData.encapContentInfo.eContent?.single, LDSObject);
        return {
            certificates: signedData.certificates,
            ldsObject: sod,
            signatures: signedData.signerInfos
        };
    }
}