1 files changed, 35 insertions, 0 deletions
diff --git a/node_modules/browserify-rsa/index.js b/node_modules/browserify-rsa/index.js
new file mode 100644
index 0000000..c3ff8e9
--- /dev/null
+++ b/node_modules/browserify-rsa/index.js
@@ -0,0 +1,35 @@
+var BN = require('bn.js')
+var randomBytes = require('randombytes')
+
+function blind (priv) {
+  var r = getr(priv)
+  var blinder = r.toRed(BN.mont(priv.modulus)).redPow(new BN(priv.publicExponent)).fromRed()
+  return { blinder: blinder, unblinder: r.invm(priv.modulus) }
+}
+
+function getr (priv) {
+  var len = priv.modulus.byteLength()
+  var r
+  do {
+    r = new BN(randomBytes(len))
+  } while (r.cmp(priv.modulus) >= 0 || !r.umod(priv.prime1) || !r.umod(priv.prime2))
+  return r
+}
+
+function crt (msg, priv) {
+  var blinds = blind(priv)
+  var len = priv.modulus.byteLength()
+  var blinded = new BN(msg).mul(blinds.blinder).umod(priv.modulus)
+  var c1 = blinded.toRed(BN.mont(priv.prime1))
+  var c2 = blinded.toRed(BN.mont(priv.prime2))
+  var qinv = priv.coefficient
+  var p = priv.prime1
+  var q = priv.prime2
+  var m1 = c1.redPow(priv.exponent1).fromRed()
+  var m2 = c2.redPow(priv.exponent2).fromRed()
+  var h = m1.isub(m2).imul(qinv).umod(p).imul(q)
+  return m2.iadd(h).imul(blinds.unblinder).umod(priv.modulus).toArrayLike(Buffer, 'be', len)
+}
+crt.getr = getr
+
+module.exports = crt