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Code Issues Releases Wiki Activity

used utf-16 string as input for aes crypto and cleaned up code

This commit is contained in:
Tankred Hase 2013-05-14 18:38:24 +02:00
parent c264dfc994
commit d2e59c7f32
1 changed files with 16 additions and 20 deletions
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36
src/js/crypto/aes-cbc.js
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@ -4,25 +4,24 @@
app.crypto.AesCBC = function(forge) {
'use strict';
var utl = forge.util;
/**
* Encrypt a String using AES-CBC-Pkcs7 using the provided keysize (e.g. 128, 256)
* @param plaintext [String] The input string in UTF8
* @param plaintext [String] The input string in UTF-16
* @param key [String] The base64 encoded key
* @param iv [String] The base64 encoded IV
* @return [String] The base64 encoded ciphertext
*/
this.encrypt = function(plaintext, key, iv) {
// parse base64 input to utf8
var keyUtf8 = forge.util.decode64(key);
var ivUtf8 = forge.util.decode64(iv);
// encrypt
var cipher = forge.aes.createEncryptionCipher(keyUtf8);
cipher.start(ivUtf8);
cipher.update(forge.util.createBuffer(plaintext));
// decode args to utf8 and encrypt
var cipher = forge.aes.createEncryptionCipher(utl.decode64(key));
cipher.start(utl.decode64(iv));
cipher.update(utl.createBuffer(utl.encodeUtf8(plaintext)));
cipher.finish();
return forge.util.encode64(cipher.output.getBytes());
// encode to base64
return utl.encode64(cipher.output.getBytes());
};
/**
@ -30,20 +29,17 @@ app.crypto.AesCBC = function(forge) {
* @param ciphertext [String] The base64 encoded ciphertext
* @param key [String] The base64 encoded key
* @param iv [String] The base64 encoded IV
* @return [String] The decrypted plaintext in UTF8
* @return [String] The decrypted plaintext in UTF-16
*/
this.decrypt = function(ciphertext, key, iv) {
// parse base64 input to utf8
var ctUtf8 = forge.util.decode64(ciphertext);
var keyUtf8 = forge.util.decode64(key);
var ivUtf8 = forge.util.decode64(iv);
var cipher = forge.aes.createDecryptionCipher(keyUtf8);
cipher.start(ivUtf8);
cipher.update(forge.util.createBuffer(ctUtf8));
// decode args input to utf8 decrypt
var cipher = forge.aes.createDecryptionCipher(utl.decode64(key));
cipher.start(utl.decode64(iv));
cipher.update(utl.createBuffer(utl.decode64(ciphertext)));
cipher.finish();
return cipher.output.getBytes();
// decode to utf16
return utl.decodeUtf8(cipher.output.getBytes());
};
};