From d47147fb6ad229b1c039aff9d0959b6e281f4df5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Tue, 14 Feb 2023 17:38:45 +0100
Subject: feat(ext/node): embed std/node into the snapshot (#17724)

This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from
"https://deno.land/std/node" (or from the location specified by
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
---
 .../crypto_browserify/asn1.js/decoders/pem.js      | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/pem.js

(limited to 'ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/pem.js')

diff --git a/ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/pem.js b/ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/pem.js
new file mode 100644
index 000000000..3dedfb293
--- /dev/null
+++ b/ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/pem.js
@@ -0,0 +1,63 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright 2017 Fedor Indutny. All rights reserved. MIT license.
+
+import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+
+import { DERDecoder } from "internal:deno_node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/der.js";
+
+export function PEMDecoder(entity) {
+  DERDecoder.call(this, entity);
+  this.enc = "pem";
+}
+// inherits(PEMDecoder, DERDecoder);
+PEMDecoder.prototype = Object.create(DERDecoder.prototype, {
+  constructor: {
+    value: PEMDecoder,
+    enumerable: false,
+    writable: true,
+    configurable: true,
+  },
+});
+
+PEMDecoder.prototype.decode = function decode(data, options) {
+  const lines = data.toString().split(/[\r\n]+/g);
+
+  const label = options.label.toUpperCase();
+
+  const re = /^-----(BEGIN|END) ([^-]+)-----$/;
+  let start = -1;
+  let end = -1;
+  for (let i = 0; i < lines.length; i++) {
+    const match = lines[i].match(re);
+    if (match === null) {
+      continue;
+    }
+
+    if (match[2] !== label) {
+      continue;
+    }
+
+    if (start === -1) {
+      if (match[1] !== "BEGIN") {
+        break;
+      }
+      start = i;
+    } else {
+      if (match[1] !== "END") {
+        break;
+      }
+      end = i;
+      break;
+    }
+  }
+  if (start === -1 || end === -1) {
+    throw new Error("PEM section not found for: " + label);
+  }
+
+  const base64 = lines.slice(start + 1, end).join("");
+  // Remove excessive symbols
+  base64.replace(/[^a-z0-9+/=]+/gi, "");
+
+  const input = Buffer.from(base64, "base64");
+  return DERDecoder.prototype.decode.call(this, input, options);
+};
-- 
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