camstreamerlib/esm/node/Digest.js

Helper library for CamStreamer ACAP applications.

import crypto from 'crypto';
export class Digest {
    nonceCount = 1;
    getAuthHeader(user, pass, method, uri, wwwAuthenticateHeader) {
        const digestItems = {};
        const digestArr = wwwAuthenticateHeader.substring(wwwAuthenticateHeader.indexOf('Digest') + 6).split(',');
        for (const arg of digestArr) {
            const pos = arg.indexOf('=');
            const key = arg.substring(0, pos).trim();
            const value = arg.substring(pos + 1).trim();
            digestItems[key] = value.replace(/"/g, '');
        }
        const HA1 = crypto.createHash('md5').update(`${user}:${digestItems['realm']}:${pass}`).digest('hex');
        const HA2 = crypto.createHash('md5').update(`${method}:${uri}`).digest('hex');
        const ncValue = ('00000000' + this.nonceCount.toString(16)).slice(-8);
        let response;
        if (digestItems['qop'] !== undefined) {
            response = crypto
                .createHash('md5')
                .update(`${HA1}:${digestItems['nonce']}:${ncValue}:162d50aa594e9648:auth:${HA2}`)
                .digest('hex');
        }
        else {
            response = crypto.createHash('md5').update(`${HA1}:${digestItems['nonce']}:${HA2}`).digest('hex');
        }
        let header = 'Digest ' +
            `username="${user}",` +
            `realm="${digestItems['realm']}",` +
            `nonce="${digestItems['nonce']}",` +
            `uri="${uri}",` +
            `response="${response}"`;
        if (digestItems['qop'] !== undefined) {
            header += `,qop=auth,nc=${ncValue},cnonce="162d50aa594e9648"`;
        }
        this.nonceCount++;
        return header;
    }
}