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| author | Paolo T <tuscanhobbit@users.noreply.github.com> | 2013-11-12 02:09:32 -0800 |
|---|---|---|
| committer | Paolo T <tuscanhobbit@users.noreply.github.com> | 2013-11-12 02:09:32 -0800 |
| commit | 67a101452b82782114143dc0b5bdba15adc0ba99 (patch) | |
| tree | 9daee3807b370d02ee4c28e6df7db08731fbb9f1 /library/cryptojs/components/mode-cfb.js | |
| parent | b23f3fc03b6bc751aab67fe2258a21f7c65bab8e (diff) | |
| parent | 7cb4c2f8ad813336aafdec05e40f3a8eb1808d00 (diff) | |
| download | volse-hubzilla-67a101452b82782114143dc0b5bdba15adc0ba99.tar.gz volse-hubzilla-67a101452b82782114143dc0b5bdba15adc0ba99.tar.bz2 volse-hubzilla-67a101452b82782114143dc0b5bdba15adc0ba99.zip | |
Merge pull request #4 from friendica/master
Fork aligned to red master
Diffstat (limited to 'library/cryptojs/components/mode-cfb.js')
| -rw-r--r-- | library/cryptojs/components/mode-cfb.js | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/library/cryptojs/components/mode-cfb.js b/library/cryptojs/components/mode-cfb.js new file mode 100644 index 000000000..fee8829bd --- /dev/null +++ b/library/cryptojs/components/mode-cfb.js @@ -0,0 +1,64 @@ +/* +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;
+}());
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