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Code Issues Releases Wiki Activity

added utf-16 support for rsa crypto

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This commit is contained in:
Tankred Hase 2013-05-14 18:48:13 +02:00
parent d2e59c7f32
commit 956e184574
1 changed files with 16 additions and 11 deletions
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27
src/js/crypto/rsa.js
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@ -4,6 +4,8 @@
app.crypto.RSA = function(forge) {
'use strict';
var utl = forge.util;
var publicKey = null,
privateKey = null;
@ -54,23 +56,26 @@ app.crypto.RSA = function(forge) {
/**
* Encrypt a String using RSA with PKCS#1 v1.5 padding
* @param plaintext [String] The input string in UTF8
* @param plaintext [String] The input string in UTF-16
* @return [String] The base64 encoded ciphertext
*/
this.encrypt = function(plaintext) {
var ct = publicKey.encrypt(plaintext);
return forge.util.encode64(ct);
// encode plaintext to utf8 and encrypt
var ct = publicKey.encrypt(utl.encodeUtf8(plaintext));
// encode ciphtext to base64
return utl.encode64(ct);
};
/**
* Decrypt a String using RSA with PKCS#1 v1.5 padding
* @param ciphertext [String] The base64 encoded ciphertext
* @return [String] The decrypted plaintext in UTF8
* @return [String] The decrypted plaintext in UTF-16
*/
this.decrypt = function(ciphertext) {
// parse base64 input to utf8
var ctUtf8 = forge.util.decode64(ciphertext);
return privateKey.decrypt(ctUtf8);
// decode base64 ciphertext to utf8
var ctUtf8 = utl.decode64(ciphertext);
// decrypt and decode to utf16
return utl.decodeUtf8(privateKey.decrypt(ctUtf8));
};
/**
@ -81,10 +86,10 @@ app.crypto.RSA = function(forge) {
this.sign = function(parts) {
var sha = forge.md.sha256.create();
parts.forEach(function(i) {
sha.update(forge.util.decode64(i));
sha.update(utl.decode64(i));
});
return forge.util.encode64(privateKey.sign(sha));
return utl.encode64(privateKey.sign(sha));
};
/**
@ -95,11 +100,11 @@ app.crypto.RSA = function(forge) {
*/
this.verify = function(parts, sig) {
// parse base64 signature to utf8
var sigUtf8 = forge.util.decode64(sig);
var sigUtf8 = utl.decode64(sig);
var sha = forge.md.sha256.create();
parts.forEach(function(i) {
sha.update(forge.util.decode64(i));
sha.update(utl.decode64(i));
});
return publicKey.verify(sha.digest().getBytes(), sigUtf8);