mirror of https://github.com/moparisthebest/mail
48 lines
1.6 KiB
JavaScript
48 lines
1.6 KiB
JavaScript
'use strict';
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/**
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* A Wrapper for Crypto.js's AES-CBC encryption
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*/
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app.crypto.AesCBC = function() {
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var mode = CryptoJS.mode.CBC; // use CBC mode for Crypto.js
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var padding = CryptoJS.pad.Pkcs7; // use Pkcs7/Pkcs5 padding for Crypto.js
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/**
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* Encrypt a String using AES-CBC-Pkcs7 using the provided keysize (e.g. 128, 256)
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* @param plaintext [String] The input string in UTF8
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* @param key [String] The base64 encoded key
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* @param iv [String] The base64 encoded IV
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* @return [String] The base64 encoded ciphertext
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*/
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this.encrypt = function(plaintext, key, iv) {
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// parse base64 input to crypto.js WordArrays
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var keyWords = CryptoJS.enc.Base64.parse(key);
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var ivWords = CryptoJS.enc.Base64.parse(iv);
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var plaintextWords = CryptoJS.enc.Utf8.parse(plaintext);
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var encrypted = CryptoJS.AES.encrypt(plaintextWords, keyWords, { iv: ivWords, mode: mode, padding: padding });
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var ctBase64 = CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
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return ctBase64;
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};
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/**
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* Decrypt a String using AES-CBC-Pkcs7 using the provided keysize (e.g. 128, 256)
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* @param ciphertext [String] The base64 encoded ciphertext
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* @param key [String] The base64 encoded key
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* @param iv [String] The base64 encoded IV
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* @return [String] The decrypted plaintext in UTF8
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*/
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this.decrypt = function(ciphertext, key, iv) {
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// parse base64 input to crypto.js WordArrays
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var keyWords = CryptoJS.enc.Base64.parse(key);
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var ivWords = CryptoJS.enc.Base64.parse(iv);
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var decrypted = CryptoJS.AES.decrypt(ciphertext, keyWords, { iv: ivWords, mode: mode, padding: padding });
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var pt = decrypted.toString(CryptoJS.enc.Utf8);
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return pt;
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};
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}; |