js-gp/apducmd.js

implementation of globalplatform

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
class apducmd {
    constructor() {
    }
    parse(cmd) {
        let cmdlen = cmd.length;
        this.CLA = cmd[0];
        this.INS = cmd[1];
        this.P1 = cmd[2];
        this.P2 = cmd[3];
        this.LC = 0;
        this.LE = undefined;
        this.DATA = new Buffer(0);
        this.EXT = false;
        if (cmdlen == 4)
            return;
        if (cmdlen == 5) {
            this.LE = cmd[4];
            if (cmd[4] == 0)
                this.LE = 0xff;
        }
        else if (cmd[4] != 0 && (cmd[4] + 5) == cmdlen) {
            this.LC = cmd[4];
            this.DATA = new Buffer(this.LC);
            cmd.slice(5).copy(this.DATA);
        }
        else if (cmd[4] != 0 && (cmd[4] + 6) == cmdlen) {
            this.LC = cmd[4];
            this.DATA = new Buffer(this.LC);
            cmd.slice(5).copy(this.DATA);
            this.LE = cmd[this.LC = 5];
            if (this.LE == 0)
                this.LE = 256;
        }
        else if (cmd[4] == 0 && cmdlen == 7) {
            this.LE = cmd.readUInt16BE(5);
            if (this.LE == 0)
                this.LE = 65536;
            this.EXT = true;
        }
        else if (cmdlen > 7 && cmd[4] == 0 && (cmd.readUInt16BE(5) + 7) == cmdlen) {
            this.LC = cmd.readUInt16BE(5);
            this.DATA = new Buffer(this.LC);
            cmd.slice(7, 7 + this.LC).copy(this.DATA);
            this.EXT = true;
        }
        else if (cmdlen > 9 && cmd[4] == 0 && (cmd.readUInt16BE(5) + 9) == cmdlen) {
            this.LC = cmd.readUInt16BE(5);
            this.DATA = new Buffer(this.LC);
            cmd.slice(7, 7 + this.LC).copy(this.DATA);
            this.LE = cmd.readUInt16BE(this.LC + 7);
            if (this.LE == 0)
                this.LE = 65536;
            this.EXT = true;
        }
    }
}
exports.apducmd = apducmd;
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