Started to play around with js crypto code

test.js implements the basic functionality
(recommand to load it in v8 (d8 test.js --shell)

1 files changed, 71 insertions, 0 deletions

diff --git a/crypto/rsa-pem.js b/crypto/rsa-pem.js
new file mode 100644
index 0000000..8236068
--- /dev/null
+++ b/crypto/rsa-pem.js
@@ -0,0 +1,71 @@
+//
+// rsa-pem.js - adding function for reading/writing PKCS#1 PEM private key
+//              to RSAKey class.
+//
+// version: 1.0 (2010-Jun-03)
+//
+// Copyright (c) 2010 Kenji Urushima (kenji.urushima@gmail.com)
+//
+// This software is licensed under the terms of the MIT License.
+// http://www.opensource.org/licenses/mit-license.php
+//
+// The above copyright and license notice shall be 
+// included in all copies or substantial portions of the Software.
+// 
+//
+// Depends on:
+//
+//
+//
+// _RSApem_pemToBase64(sPEM)
+//
+//   removing PEM header, PEM footer and space characters including
+//   new lines from PEM formatted RSA private key string.
+//
+function _rsapem_pemToBase64(sPEMPrivateKey) {
+  var s = sPEMPrivateKey;
+  s = s.replace("-----BEGIN RSA PRIVATE KEY-----", "");
+  s = s.replace("-----END RSA PRIVATE KEY-----", "");
+  s = s.replace(/[ \n]+/g, "");
+  return s;
+}
+
+function _rsapem_getPosArrayOfChildrenFromHex(hPrivateKey) {
+  var a = new Array();
+  var v1 = _asnhex_getStartPosOfV_AtObj(hPrivateKey, 0);
+  var n1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, v1);
+  var e1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, n1);
+  var d1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, e1);
+  var p1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, d1);
+  var q1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, p1);
+  var dp1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, q1);
+  var dq1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, dp1);
+  var co1 = _asnhex_getPosOfNextSibling_AtObj(hPrivateKey, dq1);
+  a.push(v1, n1, e1, d1, p1, q1, dp1, dq1, co1);
+  return a;
+}
+
+function _rsapem_getHexValueArrayOfChildrenFromHex(hPrivateKey) {
+  var posArray = _rsapem_getPosArrayOfChildrenFromHex(hPrivateKey);
+  var v =  _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[0]);
+  var n =  _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[1]);
+  var e =  _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[2]);
+  var d =  _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[3]);
+  var p =  _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[4]);
+  var q =  _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[5]);
+  var dp = _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[6]);
+  var dq = _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[7]);
+  var co = _asnhex_getHexOfV_AtObj(hPrivateKey, posArray[8]);
+  var a = new Array();
+  a.push(v, n, e, d, p, q, dp, dq, co);
+  return a;
+}
+
+function _rsapem_readPrivateKeyFromPEMString(keyPEM) {
+  var keyB64 = _rsapem_pemToBase64(keyPEM);
+  var keyHex = b64tohex(keyB64) // depends base64.js
+  var a = _rsapem_getHexValueArrayOfChildrenFromHex(keyHex);
+  this.setPrivateEx(a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8]);
+}
+
+RSAKey.prototype.readPrivateKeyFromPEMString = _rsapem_readPrivateKeyFromPEMString;