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authorMario Vavti <mario@mariovavti.com>2020-08-22 22:14:29 +0200
committerMario Vavti <mario@mariovavti.com>2020-08-22 22:14:29 +0200
commit4e0fc81e5dfaad3c3ed47a02df4589f5b25a88be (patch)
treeeb8d2ffd4840b2cfa50499ac522c3cd276eb8b04 /library/cryptojs/components/mode-cfb.js
parent3b865d432ff24532b4a5e6917e23fc42b0d7fcaf (diff)
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move cryptojs to addon
Diffstat (limited to 'library/cryptojs/components/mode-cfb.js')
-rw-r--r--library/cryptojs/components/mode-cfb.js64
1 files changed, 0 insertions, 64 deletions
diff --git a/library/cryptojs/components/mode-cfb.js b/library/cryptojs/components/mode-cfb.js
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-/*
-CryptoJS v3.1.2
-code.google.com/p/crypto-js
-(c) 2009-2013 by Jeff Mott. All rights reserved.
-code.google.com/p/crypto-js/wiki/License
-*/
-/**
- * Cipher Feedback block mode.
- */
-CryptoJS.mode.CFB = (function () {
- var CFB = CryptoJS.lib.BlockCipherMode.extend();
-
- CFB.Encryptor = CFB.extend({
- processBlock: function (words, offset) {
- // Shortcuts
- var cipher = this._cipher;
- var blockSize = cipher.blockSize;
-
- generateKeystreamAndEncrypt.call(this, words, offset, blockSize, cipher);
-
- // Remember this block to use with next block
- this._prevBlock = words.slice(offset, offset + blockSize);
- }
- });
-
- CFB.Decryptor = CFB.extend({
- processBlock: function (words, offset) {
- // Shortcuts
- var cipher = this._cipher;
- var blockSize = cipher.blockSize;
-
- // Remember this block to use with next block
- var thisBlock = words.slice(offset, offset + blockSize);
-
- generateKeystreamAndEncrypt.call(this, words, offset, blockSize, cipher);
-
- // This block becomes the previous block
- this._prevBlock = thisBlock;
- }
- });
-
- function generateKeystreamAndEncrypt(words, offset, blockSize, cipher) {
- // Shortcut
- var iv = this._iv;
-
- // Generate keystream
- if (iv) {
- var keystream = iv.slice(0);
-
- // Remove IV for subsequent blocks
- this._iv = undefined;
- } else {
- var keystream = this._prevBlock;
- }
- cipher.encryptBlock(keystream, 0);
-
- // Encrypt
- for (var i = 0; i < blockSize; i++) {
- words[offset + i] ^= keystream[i];
- }
- }
-
- return CFB;
-}());