asn1-ber - npm Package Compare versions

Comparing version 1.2.0 to 1.2.1

lib/ber/reader.js

@@ -230,3 +230,36 @@
 
+Reader.prototype.readBitString = function(tag) {
+	if (!tag)
+		tag = ASN1.BitString;
 
+	var b = this.peek();
+	if (b === null)
+		return null;
+
+	if (b !== tag)
+		throw InvalidAsn1Error('Expected 0x' + tag.toString(16) +
+															': got 0x' + b.toString(16));
+
+	var o = this.readLength(this._offset + 1);
+
+	if (o === null)
+		return null;
+
+	if (this.length > this._size - o)
+		return null;
+
+	this._offset = o;
+
+	if (this.length === 0)
+		return '';
+
+	var ignoredBits = this._buf[this._offset++];
+
+	var bitStringOctets = this._buf.slice(this._offset, this._offset + this.length - 1);
+	var bitString = (parseInt(bitStringOctets.toString('hex'), 16).toString(2)).padStart(bitStringOctets.length * 8, '0');
+	this._offset += this.length - 1;
+
+	return bitString.substring(0, bitString.length - ignoredBits);
+};
+
 Reader.prototype._readTag = function(tag) {
@@ -233,0 +266,0 @@ // assert.ok(tag !== undefined);

package.json

 {
   "name": "asn1-ber",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Generate and parse ASN1.BER objects",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -575,2 +575,6 @@
 
+## Version 1.2.1 - 07/06/2022
+
+ * Add bit string reading
+
 # License
@@ -577,0 +581,0 @@

test/unittests_lib-ber-reader.js

@@ -241,2 +241,10 @@
 
+	describe("readBitString()", function() {
+		it("can read a bit string", function() {
+			var reader = new BerReader(Buffer.from([0x03, 0x07, 0x04, 0x0a, 0x3b, 0x5f, 0x29, 0x1c, 0xd0]))
+			assert.equal(reader.readBitString(), '00001010001110110101111100101001000111001101')
+			assert.equal(reader.length, 7)
+		})
+	})
+
 	describe("complex sequences", function() {
@@ -243,0 +251,0 @@ it("are processed correctly", function() {

No alert changes

Improved metrics

Total package byte prevSize

63508

increased by1.89%

Number of downloads

11117

increased by0.42%

Lines of code

1304

increased by2.35%

Number of lines in readme file

606

increased by0.66%

No dependency changes