1 files changed, 386 insertions, 0 deletions
diff --git a/ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/der.js b/ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/der.js
new file mode 100644
index 000000000..9ab811507
--- /dev/null
+++ b/ext/node/polyfills/_crypto/crypto_browserify/asn1.js/decoders/der.js
@@ -0,0 +1,386 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright 2017 Fedor Indutny. All rights reserved. MIT license.
+
+import bignum from "internal:deno_node/polyfills/_crypto/crypto_browserify/bn.js/bn.js";
+import { DecoderBuffer } from "internal:deno_node/polyfills/_crypto/crypto_browserify/asn1.js/base/buffer.js";
+import { Node } from "internal:deno_node/polyfills/_crypto/crypto_browserify/asn1.js/base/node.js";
+import * as der from "internal:deno_node/polyfills/_crypto/crypto_browserify/asn1.js/constants/der.js";
+
+export function DERDecoder(entity) {
+  this.enc = "der";
+  this.name = entity.name;
+  this.entity = entity;
+
+  // Construct base tree
+  this.tree = new DERNode();
+  this.tree._init(entity.body);
+}
+
+DERDecoder.prototype.decode = function decode(data, options) {
+  if (!DecoderBuffer.isDecoderBuffer(data)) {
+    data = new DecoderBuffer(data, options);
+  }
+  return this.tree._decode(data, options);
+};
+
+// Tree methods
+
+function DERNode(parent) {
+  Node.call(this, "der", parent);
+}
+// inherits(DERNode, Node);
+DERNode.prototype = Object.create(Node.prototype, {
+  constructor: {
+    value: DERNode,
+    enumerable: false,
+    writable: true,
+    configurable: true,
+  },
+});
+
+DERNode.prototype._peekTag = function peekTag(buffer, tag, any) {
+  if (buffer.isEmpty()) {
+    return false;
+  }
+
+  const state = buffer.save();
+  const decodedTag = derDecodeTag(buffer, 'Failed to peek tag: "' + tag + '"');
+  if (buffer.isError(decodedTag)) {
+    return decodedTag;
+  }
+
+  buffer.restore(state);
+
+  return decodedTag.tag === tag || decodedTag.tagStr === tag ||
+    (decodedTag.tagStr + "of") === tag || any;
+};
+
+DERNode.prototype._decodeTag = function decodeTag(buffer, tag, any) {
+  const decodedTag = derDecodeTag(
+    buffer,
+    'Failed to decode tag of "' + tag + '"',
+  );
+  if (buffer.isError(decodedTag)) {
+    return decodedTag;
+  }
+
+  let len = derDecodeLen(
+    buffer,
+    decodedTag.primitive,
+    'Failed to get length of "' + tag + '"',
+  );
+
+  // Failure
+  if (buffer.isError(len)) {
+    return len;
+  }
+
+  if (
+    !any &&
+    decodedTag.tag !== tag &&
+    decodedTag.tagStr !== tag &&
+    decodedTag.tagStr + "of" !== tag
+  ) {
+    return buffer.error('Failed to match tag: "' + tag + '"');
+  }
+
+  if (decodedTag.primitive || len !== null) {
+    return buffer.skip(len, 'Failed to match body of: "' + tag + '"');
+  }
+
+  // Indefinite length... find END tag
+  const state = buffer.save();
+  const res = this._skipUntilEnd(
+    buffer,
+    'Failed to skip indefinite length body: "' + this.tag + '"',
+  );
+  if (buffer.isError(res)) {
+    return res;
+  }
+
+  len = buffer.offset - state.offset;
+  buffer.restore(state);
+  return buffer.skip(len, 'Failed to match body of: "' + tag + '"');
+};
+
+DERNode.prototype._skipUntilEnd = function skipUntilEnd(buffer, fail) {
+  for (;;) {
+    const tag = derDecodeTag(buffer, fail);
+    if (buffer.isError(tag)) {
+      return tag;
+    }
+    const len = derDecodeLen(buffer, tag.primitive, fail);
+    if (buffer.isError(len)) {
+      return len;
+    }
+
+    let res;
+    if (tag.primitive || len !== null) {
+      res = buffer.skip(len);
+    } else {
+      res = this._skipUntilEnd(buffer, fail);
+    }
+
+    // Failure
+    if (buffer.isError(res)) {
+      return res;
+    }
+
+    if (tag.tagStr === "end") {
+      break;
+    }
+  }
+};
+
+DERNode.prototype._decodeList = function decodeList(
+  buffer,
+  _tag,
+  decoder,
+  options,
+) {
+  const result = [];
+  while (!buffer.isEmpty()) {
+    const possibleEnd = this._peekTag(buffer, "end");
+    if (buffer.isError(possibleEnd)) {
+      return possibleEnd;
+    }
+
+    const res = decoder.decode(buffer, "der", options);
+    if (buffer.isError(res) && possibleEnd) {
+      break;
+    }
+    result.push(res);
+  }
+  return result;
+};
+
+DERNode.prototype._decodeStr = function decodeStr(buffer, tag) {
+  if (tag === "bitstr") {
+    const unused = buffer.readUInt8();
+    if (buffer.isError(unused)) {
+      return unused;
+    }
+    return { unused: unused, data: buffer.raw() };
+  } else if (tag === "bmpstr") {
+    const raw = buffer.raw();
+    if (raw.length % 2 === 1) {
+      return buffer.error("Decoding of string type: bmpstr length mismatch");
+    }
+
+    let str = "";
+    for (let i = 0; i < raw.length / 2; i++) {
+      str += String.fromCharCode(raw.readUInt16BE(i * 2));
+    }
+    return str;
+  } else if (tag === "numstr") {
+    const numstr = buffer.raw().toString("ascii");
+    if (!this._isNumstr(numstr)) {
+      return buffer.error(
+        "Decoding of string type: " +
+          "numstr unsupported characters",
+      );
+    }
+    return numstr;
+  } else if (tag === "octstr") {
+    return buffer.raw();
+  } else if (tag === "objDesc") {
+    return buffer.raw();
+  } else if (tag === "printstr") {
+    const printstr = buffer.raw().toString("ascii");
+    if (!this._isPrintstr(printstr)) {
+      return buffer.error(
+        "Decoding of string type: " +
+          "printstr unsupported characters",
+      );
+    }
+    return printstr;
+  } else if (/str$/.test(tag)) {
+    return buffer.raw().toString();
+  } else {
+    return buffer.error("Decoding of string type: " + tag + " unsupported");
+  }
+};
+
+DERNode.prototype._decodeObjid = function decodeObjid(
+  buffer,
+  values,
+  relative,
+) {
+  let result;
+  const identifiers = [];
+  let ident = 0;
+  let subident = 0;
+  while (!buffer.isEmpty()) {
+    subident = buffer.readUInt8();
+    ident <<= 7;
+    ident |= subident & 0x7f;
+    if ((subident & 0x80) === 0) {
+      identifiers.push(ident);
+      ident = 0;
+    }
+  }
+  if (subident & 0x80) {
+    identifiers.push(ident);
+  }
+
+  const first = (identifiers[0] / 40) | 0;
+  const second = identifiers[0] % 40;
+
+  if (relative) {
+    result = identifiers;
+  } else {
+    result = [first, second].concat(identifiers.slice(1));
+  }
+
+  if (values) {
+    let tmp = values[result.join(" ")];
+    if (tmp === undefined) {
+      tmp = values[result.join(".")];
+    }
+    if (tmp !== undefined) {
+      result = tmp;
+    }
+  }
+
+  return result;
+};
+
+DERNode.prototype._decodeTime = function decodeTime(buffer, tag) {
+  const str = buffer.raw().toString();
+
+  let year;
+  let mon;
+  let day;
+  let hour;
+  let min;
+  let sec;
+  if (tag === "gentime") {
+    year = str.slice(0, 4) | 0;
+    mon = str.slice(4, 6) | 0;
+    day = str.slice(6, 8) | 0;
+    hour = str.slice(8, 10) | 0;
+    min = str.slice(10, 12) | 0;
+    sec = str.slice(12, 14) | 0;
+  } else if (tag === "utctime") {
+    year = str.slice(0, 2) | 0;
+    mon = str.slice(2, 4) | 0;
+    day = str.slice(4, 6) | 0;
+    hour = str.slice(6, 8) | 0;
+    min = str.slice(8, 10) | 0;
+    sec = str.slice(10, 12) | 0;
+    if (year < 70) {
+      year = 2000 + year;
+    } else {
+      year = 1900 + year;
+    }
+  } else {
+    return buffer.error("Decoding " + tag + " time is not supported yet");
+  }
+
+  return Date.UTC(year, mon - 1, day, hour, min, sec, 0);
+};
+
+DERNode.prototype._decodeNull = function decodeNull() {
+  return null;
+};
+
+DERNode.prototype._decodeBool = function decodeBool(buffer) {
+  const res = buffer.readUInt8();
+  if (buffer.isError(res)) {
+    return res;
+  } else {
+    return res !== 0;
+  }
+};
+
+DERNode.prototype._decodeInt = function decodeInt(buffer, values) {
+  // Bigint, return as it is (assume big endian)
+  const raw = buffer.raw();
+  let res = new bignum(raw);
+
+  if (values) {
+    res = values[res.toString(10)] || res;
+  }
+
+  return res;
+};
+
+DERNode.prototype._use = function use(entity, obj) {
+  if (typeof entity === "function") {
+    entity = entity(obj);
+  }
+  return entity._getDecoder("der").tree;
+};
+
+// Utility methods
+
+function derDecodeTag(buf, fail) {
+  let tag = buf.readUInt8(fail);
+  if (buf.isError(tag)) {
+    return tag;
+  }
+
+  const cls = der.tagClass[tag >> 6];
+  const primitive = (tag & 0x20) === 0;
+
+  // Multi-octet tag - load
+  if ((tag & 0x1f) === 0x1f) {
+    let oct = tag;
+    tag = 0;
+    while ((oct & 0x80) === 0x80) {
+      oct = buf.readUInt8(fail);
+      if (buf.isError(oct)) {
+        return oct;
+      }
+
+      tag <<= 7;
+      tag |= oct & 0x7f;
+    }
+  } else {
+    tag &= 0x1f;
+  }
+  const tagStr = der.tag[tag];
+
+  return {
+    cls: cls,
+    primitive: primitive,
+    tag: tag,
+    tagStr: tagStr,
+  };
+}
+
+function derDecodeLen(buf, primitive, fail) {
+  let len = buf.readUInt8(fail);
+  if (buf.isError(len)) {
+    return len;
+  }
+
+  // Indefinite form
+  if (!primitive && len === 0x80) {
+    return null;
+  }
+
+  // Definite form
+  if ((len & 0x80) === 0) {
+    // Short form
+    return len;
+  }
+
+  // Long form
+  const num = len & 0x7f;
+  if (num > 4) {
+    return buf.error("length octect is too long");
+  }
+
+  len = 0;
+  for (let i = 0; i < num; i++) {
+    len <<= 8;
+    const j = buf.readUInt8(fail);
+    if (buf.isError(j)) {
+      return j;
+    }
+    len |= j;
+  }
+
+  return len;
+}