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authorMario <mario@mariovavti.com>2020-11-05 08:46:42 +0000
committerMario <mario@mariovavti.com>2020-11-05 08:46:42 +0000
commitbafbf0416462c6f18c3fb6c8c06a063c8d6fdae6 (patch)
tree8929845be585b09d0f420621281c5531e1efad3e /library/cryptojs/components/mode-ctr-gladman.js
parent6f93d9848c43019d43ea76c27d42d657ba031cd7 (diff)
parentfdefa101d84dc2a9424eaedbdb003a4c30ec5d01 (diff)
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Merge branch '5.0RC'5.0
Diffstat (limited to 'library/cryptojs/components/mode-ctr-gladman.js')
-rw-r--r--library/cryptojs/components/mode-ctr-gladman.js102
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diff --git a/library/cryptojs/components/mode-ctr-gladman.js b/library/cryptojs/components/mode-ctr-gladman.js
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--- a/library/cryptojs/components/mode-ctr-gladman.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
-*/
-/** @preserve
- * Counter block mode compatible with Dr Brian Gladman fileenc.c
- * derived from CryptoJS.mode.CTR
- * Jan Hruby jhruby.web@gmail.com
- */
-CryptoJS.mode.CTRGladman = (function () {
- var CTRGladman = CryptoJS.lib.BlockCipherMode.extend();
-
- function incWord(word)
- {
- if (((word >> 24) & 0xff) === 0xff) { //overflow
- var b1 = (word >> 16)&0xff;
- var b2 = (word >> 8)&0xff;
- var b3 = word & 0xff;
-
- if (b1 === 0xff) // overflow b1
- {
- b1 = 0;
- if (b2 === 0xff)
- {
- b2 = 0;
- if (b3 === 0xff)
- {
- b3 = 0;
- }
- else
- {
- ++b3;
- }
- }
- else
- {
- ++b2;
- }
- }
- else
- {
- ++b1;
- }
-
- word = 0;
- word += (b1 << 16);
- word += (b2 << 8);
- word += b3;
- }
- else
- {
- word += (0x01 << 24);
- }
- return word;
- }
-
- function incCounter(counter)
- {
- if ((counter[0] = incWord(counter[0])) === 0)
- {
- // encr_data in fileenc.c from Dr Brian Gladman's counts only with DWORD j < 8
- counter[1] = incWord(counter[1]);
- }
- return counter;
- }
-
- var Encryptor = CTRGladman.Encryptor = CTRGladman.extend({
- processBlock: function (words, offset) {
- // Shortcuts
- var cipher = this._cipher
- var blockSize = cipher.blockSize;
- var iv = this._iv;
- var counter = this._counter;
-
- // Generate keystream
- if (iv) {
- counter = this._counter = iv.slice(0);
-
- // Remove IV for subsequent blocks
- this._iv = undefined;
- }
-
- incCounter(counter);
-
- var keystream = counter.slice(0);
- cipher.encryptBlock(keystream, 0);
-
- // Encrypt
- for (var i = 0; i < blockSize; i++) {
- words[offset + i] ^= keystream[i];
- }
- }
- });
-
- CTRGladman.Decryptor = Encryptor;
-
- return CTRGladman;
-}());
-
-