ecdsa: moved all signature encoding to ECSignature

test/ecsignature.js

@@ -0,0 +1,82 @@
+var assert = require('assert')
+
+var BigInteger = require('bigi')
+var ECSignature = require('../src/ecsignature')
+
+var fixtures = require('./fixtures/ecsignature.json')
+
+describe('ECSignature', function() {
+  describe('toCompact', function() {
+    fixtures.valid.forEach(function(f) {
+      it('encodes ' + f.compact.hex + ' correctly', function() {
+        var signature = new ECSignature(
+          new BigInteger(f.signature.r),
+          new BigInteger(f.signature.s)
+        )
+
+        var buffer = signature.toCompact(f.compact.i, f.compact.compressed)
+        assert.equal(buffer.toString('hex'), f.compact.hex)
+      })
+    })
+  })
+
+  describe('fromCompact', function() {
+    fixtures.valid.forEach(function(f) {
+      it('decodes ' + f.compact.hex + ' correctly', function() {
+        var buffer = new Buffer(f.compact.hex, 'hex')
+        var parsed = ECSignature.fromCompact(buffer)
+
+        assert.equal(parsed.compressed, f.compact.compressed)
+        assert.equal(parsed.i, f.compact.i)
+        assert.equal(parsed.signature.r.toString(), f.signature.r)
+        assert.equal(parsed.signature.s.toString(), f.signature.s)
+      })
+    })
+
+    fixtures.invalid.compact.forEach(function(f) {
+      it('throws on ' + f.hex, function() {
+        var buffer = new Buffer(f.hex, 'hex')
+
+        assert.throws(function() {
+          ECSignature.fromCompact(buffer)
+        }, new RegExp(f.exception))
+      })
+    })
+  })
+
+  describe('toDER', function() {
+    it('encodes a DER signature', function() {
+      fixtures.valid.forEach(function(f) {
+        var signature = new ECSignature(
+          new BigInteger(f.signature.r),
+          new BigInteger(f.signature.s)
+        )
+
+        var DER = signature.toDER()
+        assert.equal(DER.toString('hex'), f.DER)
+      })
+    })
+  })
+
+  describe('fromDER', function() {
+    it('decodes the correct signature', function() {
+      fixtures.valid.forEach(function(f) {
+        var buffer = new Buffer(f.DER, 'hex')
+        var signature = ECSignature.fromDER(buffer)
+
+        assert.equal(signature.r.toString(), f.signature.r)
+        assert.equal(signature.s.toString(), f.signature.s)
+      })
+    })
+
+    fixtures.invalid.DER.forEach(function(f) {
+      it('throws on ' + f.hex, function() {
+        var buffer = new Buffer(f.hex, 'hex')
+
+        assert.throws(function() {
+          ECSignature.fromDER(buffer)
+        }, new RegExp(f.exception))
+      })
+    })
+  })
+})