v1.5.1: bugfix increase loop limit to allow for 100+ domains

LICENSE

@@ -1,21 +1,375 @@
-MIT License
+Copyright 2016-2018 AJ ONeal
 
-Copyright (c) 2016 Daplie, Inc
+Mozilla Public License Version 2.0
+==================================
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
+1. Definitions
-of this software and associated documentation files (the "Software"), to deal
+--------------
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all
+1.1. "Contributor"
-copies or substantial portions of the Software.
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+1.2. "Contributor Version"
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    means the combination of the Contributions of others (if any) used
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    by a Contributor and that particular Contributor's Contribution.
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+1.3. "Contribution"
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    means Covered Software of a particular Contributor.
-SOFTWARE.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.

README.md

@@ -1,48 +1,79 @@
-cert-info.js
+# [cert-info.js](https://git.coolaj86.com/coolaj86/cert-info.js)
-============
 
 Read basic info from a cert.pem / x509 certificate.
 
-Install
+Used for [Greenlock.js](https://git.coolaj86.com/coolaj86/greenlock-express.js)
-=======
+
+# Features
+
+| <175 lines of code | 1.7k gzipped | 4.4k minified | 8.8k with comments |
+
+* [x] Parses x.509 certificate schemas
+  * [x] DER/ASN.1
+  * [x] PEM (base64-encoded DER)
+  * [x] Subject
+  * [x] SAN extension (altNames)
+  * [x] Issuance Date (notBefore)
+  * [x] Expiry Date (notAfter)
+* [x] VanillaJS, **Zero Dependencies**
+  * [x] Node.js
+  * [ ] Browsers (built, publishing soon)
+
+# Install
 
 ```bash
 # bin
-npm install --global certpem
+npm install --global cert-info
 
 # node.js library
-npm install --save certpem
+npm install --save cert-info
 ```
 
-Usage
+# Usage
-=====
+
+## CLI
 
 For basic info (subject, altnames, issuedAt, expiresAt):
 
 ```bash
-certpem /path/to/cert.pem
+cert-info /path/to/cert.pem
 ```
 
-Output all info by passing `--debug` or use `--json` to see the basic info pretty-printed.
+## node.js
 
 ```javascript
 'use strict';
 
-var certpem = require('certpem').certpem
+var certinfo = require('cert-info');
 var cert = fs.readFile('cert.pem', 'ascii', function (err, certstr) {
-  console.info(cert.pem.info());
 
-  console.info(cert.pem.debug());
+  // basic info
+  console.info(certinfo.info(certstr));
+
+  // if you need to submit a bug report
+  console.info(certinfo.debug(certstr));
 });
 ```
 
+Example output:
+
 ```javascript
 {
-  "subject": "localhost.daplie.com",
+  "subject": "localhost.example.com",
   "altnames": [
-    "localhost.daplie.com"
+    "localhost.example.com"
   ],
   "issuedAt": 1465516800000,
   "expiresAt": 1499731199000
 }
 ```
+
+With a few small changes this could also work in the browser
+(it has no dependencies and all of the non-browser things are on the Enc object).
+
+# Legal
+
+[cert-info.js](https://git.coolaj86.com/coolaj86/cert-info.js) |
+MPL-2.0 |
+[Terms of Use](https://therootcompany.com/legal/#terms) |
+[Privacy Policy](https://therootcompany.com/legal/#privacy)

bin/cert-info.js

@@ -1,8 +1,11 @@
 #!/usr/bin/env node
-
+// Copyright 2016-2018 AJ ONeal. All rights reserved
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 'use strict';
 
-var certpem = require('../').certpem;
+var certinfo = require('../');
 var path = require('path');
 var filepath = (process.cwd() + path.sep + 'cert.pem');
 var debug = false;
@@ -30,9 +33,9 @@ else {
 }
 
 if (debug) {
-  console.info(JSON.stringify(certpem.debug(cert), null, '  '));
+  console.info(JSON.stringify(certinfo.debug(cert), null, '  '));
 } else {
-  var c = certpem.info(cert);
+  var c = certinfo.info(cert);
 
   if (json) {
     console.info(JSON.stringify(c, null, '  '));

index.js

@@ -1,84 +1,7 @@
+// Copyright 2016-2018 AJ ONeal. All rights reserved
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 'use strict';
 
-var certInfo = module.exports;
+module.exports = require('./lib/cert-info.js');
-module.exports.certpem = certInfo;
-
-require('buffer-v6-polyfill');
-
-// this is really memory expensive to do
-// (about half of a megabyte of loaded code)
-certInfo._pemToBinAb  = function (pem) {
-  var b64 = pem.replace(/(-----(BEGIN|END) CERTIFICATE-----|[\n\r])/g, '');
-  var buf = Buffer.from(b64, 'base64');
-  var ab = new Uint8Array(buf).buffer;          // WORKS
-  //var ab = buf.buffer                         // Doesn't work
-
-  return ab;
-};
-certInfo.debug = certInfo.getCertInfo = function (pem) {
-  var ab = module.exports._pemToBinAb(pem);
-  var merge = require("node.extend");
-
-  var common = require("asn1js/org/pkijs/common");
-  var _asn1js = require("asn1js");
-  var _pkijs = require("pkijs");
-  var _x509schema = require("pkijs/org/pkijs/x509_schema");
-
-  // #region Merging function/object declarations for ASN1js and PKIjs
-  var asn1js = merge(true, _asn1js, common);
-
-  var x509schema = merge(true, _x509schema, asn1js);
-
-  var pkijs_1 = merge(true, _pkijs, asn1js);
-  var pkijs = merge(true, pkijs_1, x509schema);
-
-  var asn1 = pkijs.org.pkijs.fromBER(ab);
-  var certSimpl = new pkijs.org.pkijs.simpl.CERT({ schema: asn1.result });
-
-  return certSimpl;
-};
-
-certInfo.info = certInfo.getBasicInfo = function (pem) {
-  var c = certInfo.getCertInfo(pem);
-  var domains = [];
-  var sub;
-
-  c.extensions.forEach(function (ext) {
-    if (ext.parsedValue && ext.parsedValue.altNames) {
-      ext.parsedValue.altNames.forEach(function (alt) {
-        domains.push(alt.Name);
-      });
-    }
-  });
-
-  sub = c.subject.types_and_values[0].value.value_block.value || null;
-
-  return {
-    subject: sub
-  , altnames: domains
-    // for debugging during console.log
-    // do not expect these values to be here
-  , _issuedAt: c.notBefore.value
-  , _expiresAt: c.notAfter.value
-  , issuedAt: new Date(c.notBefore.value).valueOf()
-  , expiresAt: new Date(c.notAfter.value).valueOf()
-  };
-};
-
-certInfo.getCertInfoFromFile = function (pemFile) {
-  return require('fs').readFileSync(pemFile, 'ascii');
-};
-
-/*
-certInfo.testGetCertInfo = function (pathname) {
-  var path = require('path');
-  var pemFile = pathname || path.join(__dirname, '..', 'tests', 'example.cert.pem');
-  return certInfo.getCertInfo(certInfo.getCertInfoFromFile(pemFile));
-};
-
-certInfo.testBasicCertInfo = function (pathname) {
-  var path = require('path');
-  var pemFile = pathname || path.join(__dirname, '..', 'tests', 'example.cert.pem');
-  return certInfo.getBasicInfo(certInfo.getCertInfoFromFile(pemFile));
-};
-*/

lib/asn1-parser.js

@@ -0,0 +1,150 @@
+// Copyright 2016-2018 AJ ONeal. All rights reserved
+// https://git.coolaj86.com/coolaj86/asn1-parser.js
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+;(function (exports) {
+'use strict';
+
+if (!exports.ASN1) { exports.ASN1 = {}; }
+if (!exports.Enc) { exports.Enc = {}; }
+if (!exports.PEM) { exports.PEM = {}; }
+
+var ASN1 = exports.ASN1;
+var Enc = exports.Enc;
+var PEM = exports.PEM;
+
+//
+// Parser
+//
+
+// Although I've only seen 9 max in https certificates themselves,
+// but each domain list could have up to 100
+ASN1.ELOOPN = 102;
+ASN1.ELOOP = "uASN1.js Error: iterated over " + ASN1.ELOOPN + "+ elements (probably a malformed file)";
+// I've seen https certificates go 29 deep
+ASN1.EDEEPN = 60;
+ASN1.EDEEP = "uASN1.js Error: element nested " + ASN1.EDEEPN + "+ layers deep (probably a malformed file)";
+// Container Types are Sequence 0x30, Container Array? (0xA0, 0xA1)
+// Value Types are Boolean 0x01, Integer 0x02, Null 0x05, Object ID 0x06, String 0x0C, 0x16, 0x13, 0x1e Value Array? (0x82)
+// Bit String (0x03) and Octet String (0x04) may be values or containers
+// Sometimes Bit String is used as a container (RSA Pub Spki)
+ASN1.CTYPES = [ 0x30, 0x31, 0xa0, 0xa1 ];
+ASN1.VTYPES = [ 0x01, 0x02, 0x05, 0x06, 0x0c, 0x82 ];
+ASN1.parse = function parseAsn1Helper(buf) {
+  //var ws = '  ';
+  function parseAsn1(buf, depth, eager) {
+    if (depth.length >= ASN1.EDEEPN) { throw new Error(ASN1.EDEEP); }
+
+    var index = 2; // we know, at minimum, data starts after type (0) and lengthSize (1)
+    var asn1 = { type: buf[0], lengthSize: 0, length: buf[1] };
+    var child;
+    var iters = 0;
+    var adjust = 0;
+    var adjustedLen;
+
+    // Determine how many bytes the length uses, and what it is
+    if (0x80 & asn1.length) {
+      asn1.lengthSize = 0x7f & asn1.length;
+      // I think that buf->hex->int solves the problem of Endianness... not sure
+      asn1.length = parseInt(Enc.bufToHex(buf.slice(index, index + asn1.lengthSize)), 16);
+      index += asn1.lengthSize;
+    }
+
+    // High-order bit Integers have a leading 0x00 to signify that they are positive.
+    // Bit Streams use the first byte to signify padding, which x.509 doesn't use.
+    if (0x00 === buf[index] && (0x02 === asn1.type || 0x03 === asn1.type)) {
+      // However, 0x00 on its own is a valid number
+      if (asn1.length > 1) {
+        index += 1;
+        adjust = -1;
+      }
+    }
+    adjustedLen = asn1.length + adjust;
+
+    //console.warn(depth.join(ws) + '0x' + Enc.numToHex(asn1.type), index, 'len:', asn1.length, asn1);
+
+    function parseChildren(eager) {
+      asn1.children = [];
+      //console.warn('1 len:', (2 + asn1.lengthSize + asn1.length), 'idx:', index, 'clen:', 0);
+      while (iters < ASN1.ELOOPN && index < (2 + asn1.length + asn1.lengthSize)) {
+        iters += 1;
+        depth.length += 1;
+        child = parseAsn1(buf.slice(index, index + adjustedLen), depth, eager);
+        depth.length -= 1;
+        // The numbers don't match up exactly and I don't remember why...
+        // probably something with adjustedLen or some such, but the tests pass
+        index += (2 + child.lengthSize + child.length);
+        //console.warn('2 len:', (2 + asn1.lengthSize + asn1.length), 'idx:', index, 'clen:', (2 + child.lengthSize + child.length));
+        if (index > (2 + asn1.lengthSize + asn1.length)) {
+          if (!eager) { console.error(JSON.stringify(asn1, ASN1._replacer, 2)); }
+          throw new Error("Parse error: child value length (" + child.length
+            + ") is greater than remaining parent length (" + (asn1.length - index)
+            + " = " + asn1.length + " - " + index + ")");
+        }
+        asn1.children.push(child);
+        //console.warn(depth.join(ws) + '0x' + Enc.numToHex(asn1.type), index, 'len:', asn1.length, asn1);
+      }
+      if (index !== (2 + asn1.lengthSize + asn1.length)) {
+        //console.warn('index:', index, 'length:', (2 + asn1.lengthSize + asn1.length));
+        throw new Error("premature end-of-file");
+      }
+      if (iters >= ASN1.ELOOPN) { throw new Error(ASN1.ELOOP); }
+
+      delete asn1.value;
+      return asn1;
+    }
+
+    // Recurse into types that are _always_ containers
+    if (-1 !== ASN1.CTYPES.indexOf(asn1.type)) { return parseChildren(eager); }
+
+    // Return types that are _always_ values
+    asn1.value = buf.slice(index, index + adjustedLen);
+    if (-1 !== ASN1.VTYPES.indexOf(asn1.type)) { return asn1; }
+
+    // For ambigious / unknown types, recurse and return on failure
+    // (and return child array size to zero)
+    try { return parseChildren(true); }
+    catch(e) { asn1.children.length = 0; return asn1; }
+  }
+
+  var asn1 = parseAsn1(buf, []);
+  var len = buf.byteLength || buf.length;
+  if (len !== 2 + asn1.lengthSize + asn1.length) {
+    throw new Error("Length of buffer does not match length of ASN.1 sequence.");
+  }
+  return asn1;
+};
+ASN1._replacer = function (k, v) {
+  if ('type' === k) { return '0x' + Enc.numToHex(v); }
+  if (v && 'value' === k) { return '0x' + Enc.bufToHex(v.data || v); }
+  return v;
+};
+
+// don't replace the full parseBlock, if it exists
+PEM.parseBlock = PEM.parseBlock || function (str) {
+  var b64 = str.split(/\n/).filter(function (line) {
+    return !/-----/.test(line);
+  }).join('');
+  var der = Enc.base64ToBuf(b64);
+  return { bytes: der };
+};
+
+Enc.base64ToBuf = function (b64) {
+  return Buffer.from(b64, 'base64');
+};
+Enc.binToBuf = function (bin) {
+  return Buffer.from(bin, 'binary');
+};
+Enc.bufToHex = function (u8) {
+  return Buffer.from(u8).toString('hex');
+};
+Enc.numToHex = function (d) {
+  d = d.toString(16);
+  if (d.length % 2) {
+    return '0' + d;
+  }
+  return d;
+};
+
+}('undefined' !== typeof window ? window : module.exports));

lib/cert-info.js

@@ -0,0 +1,106 @@
+// Copyright 2016-2018 AJ ONeal. All rights reserved
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+'use strict';
+
+var certInfo = module.exports;
+
+var ASN1 = require("./asn1-parser.js").ASN1;
+var PEM = require("./asn1-parser.js").PEM;
+var Enc = require("./asn1-parser.js").Enc;
+
+Enc.hexToBuf = function (hex) {
+  return Buffer.from(hex, 'hex');
+};
+Enc.bufToUtf8 = function (u8) {
+  return Buffer.from(u8).toString('utf8');
+};
+
+certInfo.debug = certInfo.getCertInfo = function (pem) {
+  var bytes = PEM.parseBlock(pem).bytes;
+  return ASN1.parse(bytes);
+};
+
+certInfo.info = certInfo.getBasicInfo = function (pem) {
+  var c = certInfo.getCertInfo(pem);
+  // A cert has 3 parts: cert, signature meta, signature
+  if (c.children.length !== 3) {
+    throw new Error("doesn't look like a certificate: expected 3 parts of header");
+  }
+  c = c.children[0];
+  if (8 !== c.children.length) {
+    throw new Error("doesn't look like a certificate: expected 8 parts to certificate");
+  }
+  // 0:0 value 2
+  // 1 variable-length value
+  // 2:0 sha256 identifier 2:1 null
+  // 3 certificate of issuer C/O/OU/CN
+  // 4:0 notBefore 4:1 notAfter
+  var nbf = Enc.hexToBuf(c.children[4].children[0].value);
+  var exp = Enc.hexToBuf(c.children[4].children[1].value);
+  nbf = new Date(Date.UTC(
+    '20' + nbf.slice(0, 2)
+  , nbf.slice(2, 4) - 1
+  , nbf.slice(4, 6)
+  , nbf.slice(6, 8)
+  , nbf.slice(8, 10)
+  , nbf.slice(10, 12)
+  ));
+  exp = new Date(Date.UTC(
+    '20' + exp.slice(0, 2)
+  , exp.slice(2, 4) - 1
+  , exp.slice(4, 6)
+  , exp.slice(6, 8)
+  , exp.slice(8, 10)
+  , exp.slice(10, 12)
+  ));
+  // 5 the client C/O/OU/CN, etc
+  var sub = c.children[5].children.filter(function (set) {
+    if ('550403' === Enc.bufToHex(set.children[0].children[0].value)) {
+      return true;
+    }
+  }).map(function (set) {
+    return Enc.bufToUtf8(set.children[0].children[1].value);
+  })[0];
+  // 6 public key
+  // 7 extensions
+  var domains = c.children[7].children[0].children.filter(function (seq) {
+    if ('551d11' === Enc.bufToHex(seq.children[0].value)) {
+      return true;
+    }
+  }).map(function (seq) {
+    return seq.children[1].children[0].children.map(function (name) {
+      return Enc.bufToUtf8(name.value);
+    });
+  })[0];
+
+  return {
+    subject: sub
+  , altnames: domains
+    // for debugging during console.log
+    // do not expect these values to be here
+  , _issuedAt: nbf
+  , _expiresAt: exp
+  , issuedAt: nbf.valueOf()
+  , expiresAt: exp.valueOf()
+  };
+};
+
+certInfo.getCertInfoFromFile = function (pemFile) {
+  return require('fs').readFileSync(pemFile, 'ascii');
+};
+
+/*
+certInfo.testGetCertInfo = function (pathname) {
+  var path = require('path');
+  var pemFile = pathname || path.join(__dirname, '..', 'tests', 'example.cert.pem');
+  return certInfo.getCertInfo(certInfo.getCertInfoFromFile(pemFile));
+};
+
+certInfo.testBasicCertInfo = function (pathname) {
+  var path = require('path');
+  var pemFile = pathname || path.join(__dirname, '..', 'tests', 'example.cert.pem');
+  return certInfo.getBasicInfo(certInfo.getCertInfoFromFile(pemFile));
+};
+*/

package.json

@@ -1,17 +1,20 @@
 {
-  "name": "certpem",
+  "name": "cert-info",
-  "version": "1.0.0",
+  "version": "1.5.1",
   "description": "Read basic info (subject, altnames, expiresAt, issuedAt) from a cert.pem / x509 certificate (tls / ssl / https) ",
   "main": "index.js",
+  "author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
+  "license": "MPL-2.0",
+  "homepage": "https://git.coolaj86.com/coolaj86/cert-info.js",
   "bin": {
-    "certpem": "bin/certpem.js"
+    "cert-info": "bin/cert-info.js"
   },
   "scripts": {
     "test": "node test.js"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/Daplie/cert-info.js.git"
+    "url": "https://git.coolaj86.com/coolaj86/cert-info.js.git"
   },
   "keywords": [
     "cert.pem",
@@ -27,20 +30,9 @@
     "expired",
     "expires",
     "issued",
-    "at",
+    "asn1"
-    "asn1",
-    "pki"
   ],
-  "author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
-  "license": "(MIT OR Apache-2.0)",
   "bugs": {
-    "url": "https://github.com/Daplie/cert-info.js/issues"
+    "url": "https://git.coolaj86.com/coolaj86/cert-info.js/issues"
-  },
-  "homepage": "https://github.com/Daplie/cert-info.js#readme",
-  "dependencies": {
-    "asn1js": "^1.2.12",
-    "buffer-v6-polyfill": "^1.0.3",
-    "node.extend": "^1.1.5",
-    "pkijs": "^1.3.27"
   }
 }

test.js

@@ -1,3 +1,7 @@
+// Copyright 2016-2018 AJ ONeal. All rights reserved
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 'use strict';
 
-require('./bin/certpem.js');
+require('./bin/cert-info.js');