EnvVars.js

/**
 *
 * Get the environment variables
 *
 * 0:000> .scriptload \path\to\EnvVars.js
 * 0:000> dx @$env().Where(e => e.Name == "USERNAME")
 *
 */

"use strict";

const log = x => host.diagnostics.debugLog(x + "\n");


class EnvironmentVariable
{
    constructor(addr, name, value)
    {
        this.Address = addr
        this.Name = name;
        this.Value = value;
    }

    toString()
    {
        return "(" + this.Address.toString(16) + ") " + this.Name + "=" + this.Value;
    }
}


/**
 * Generator to inspect the PEB looking for the Environment variables from PEB
 */
function *GetEnvironmentVariables()
{
    var EnvironmentVariables = [];
    var Peb = host.namespace.Debugger.Sessions[0].Processes.First().Environment.EnvironmentBlock;
    var EnvVarBlockAddr = Peb.ProcessParameters.Environment.address;
    var off = 0;
    while (true)
    {
        var addr = EnvVarBlockAddr.add(off);
        var env = host.memory.readWideString(addr);
        if (env.length == 0)
        {
            break;
        }

        if (env.indexOf("="))
        {
            let p = env.split("=");
            var Env = new EnvironmentVariable(addr, p[0], p[1]);
        }
        else
        {
            var Env = new EnvironmentVariable(addr, env, "");
        }

        yield (Env);
        off += (env.length+1)*2;
    }
}


/**
 * Initialize the function alias.
 */
function initializeScript()
{
    return [
        new host.functionAlias(GetEnvironmentVariables, "env")
    ];
}