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crypto: Streaming interface for cipher/decipher/iv

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This commit is contained in:
isaacs 2012-10-29 16:36:20 -07:00
parent 175f78c6ba
commit e336134658
1 changed files with 32 additions and 4 deletions
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36
lib/crypto.js
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@ -213,15 +213,28 @@ function getDecoder(decoder, encoding) {
exports.createCipher = exports.Cipher = Cipher; exports.createCipher = exports.Cipher = Cipher;
function Cipher(cipher, password) { function Cipher(cipher, password, options) {
if (!(this instanceof Cipher)) if (!(this instanceof Cipher))
return new Cipher(cipher, password); return new Cipher(cipher, password);
this._binding = new binding.Cipher; this._binding = new binding.Cipher;
this._binding.init(cipher, toBuf(password)); this._binding.init(cipher, toBuf(password));
this._decoder = null; this._decoder = null;
stream.Transform.call(this, options);
} }
util.inherits(Cipher, stream.Transform);
Cipher.prototype._transform = function(chunk, output, callback) {
output(this._binding.update(chunk));
callback();
};
Cipher.prototype._flush = function(output, callback) {
output(this._binding.final());
callback();
};
Cipher.prototype.update = function(data, inputEncoding, outputEncoding) { Cipher.prototype.update = function(data, inputEncoding, outputEncoding) {
inputEncoding = inputEncoding || exports.DEFAULT_ENCODING; inputEncoding = inputEncoding || exports.DEFAULT_ENCODING;
@ -260,15 +273,20 @@ Cipher.prototype.setAutoPadding = function(ap) {
exports.createCipheriv = exports.Cipheriv = Cipheriv; exports.createCipheriv = exports.Cipheriv = Cipheriv;
function Cipheriv(cipher, key, iv) { function Cipheriv(cipher, key, iv, options) {
if (!(this instanceof Cipheriv)) if (!(this instanceof Cipheriv))
return new Cipheriv(cipher, key, iv); return new Cipheriv(cipher, key, iv);
this._binding = new binding.Cipher(); this._binding = new binding.Cipher();
this._binding.initiv(cipher, toBuf(key), toBuf(iv)); this._binding.initiv(cipher, toBuf(key), toBuf(iv));
this._decoder = null; this._decoder = null;
stream.Transform.call(this, options);
} }
util.inherits(Cipheriv, stream.Transform);
Cipheriv.prototype._transform = Cipher.prototype._transform;
Cipheriv.prototype._flush = Cipher.prototype._flush;
Cipheriv.prototype.update = Cipher.prototype.update; Cipheriv.prototype.update = Cipher.prototype.update;
Cipheriv.prototype.final = Cipher.prototype.final; Cipheriv.prototype.final = Cipher.prototype.final;
Cipheriv.prototype.setAutoPadding = Cipher.prototype.setAutoPadding; Cipheriv.prototype.setAutoPadding = Cipher.prototype.setAutoPadding;
@ -276,16 +294,21 @@ Cipheriv.prototype.setAutoPadding = Cipher.prototype.setAutoPadding;
exports.createDecipher = exports.Decipher = Decipher; exports.createDecipher = exports.Decipher = Decipher;
function Decipher(cipher, password) { function Decipher(cipher, password, options) {
if (!(this instanceof Decipher)) if (!(this instanceof Decipher))
return new Decipher(cipher, password); return new Decipher(cipher, password);
this._binding = new binding.Decipher; this._binding = new binding.Decipher;
this._binding.init(cipher, toBuf(password)); this._binding.init(cipher, toBuf(password));
this._decoder = null; this._decoder = null;
stream.Transform.call(this, options);
} }
util.inherits(Decipher, stream.Transform);
Decipher.prototype._transform = Cipher.prototype._transform;
Decipher.prototype._flush = Cipher.prototype._flush;
Decipher.prototype.update = Cipher.prototype.update; Decipher.prototype.update = Cipher.prototype.update;
Decipher.prototype.final = Cipher.prototype.final; Decipher.prototype.final = Cipher.prototype.final;
Decipher.prototype.finaltol = Cipher.prototype.final; Decipher.prototype.finaltol = Cipher.prototype.final;
@ -294,16 +317,21 @@ Decipher.prototype.setAutoPadding = Cipher.prototype.setAutoPadding;
exports.createDecipheriv = exports.Decipheriv = Decipheriv; exports.createDecipheriv = exports.Decipheriv = Decipheriv;
function Decipheriv(cipher, key, iv) { function Decipheriv(cipher, key, iv, options) {
if (!(this instanceof Decipheriv)) if (!(this instanceof Decipheriv))
return new Decipheriv(cipher, key, iv); return new Decipheriv(cipher, key, iv);
this._binding = new binding.Decipher; this._binding = new binding.Decipher;
this._binding.initiv(cipher, toBuf(key), toBuf(iv)); this._binding.initiv(cipher, toBuf(key), toBuf(iv));
this._decoder = null; this._decoder = null;
stream.Transform.call(this, options);
} }
util.inherits(Decipheriv, stream.Transform);
Decipheriv.prototype._transform = Cipher.prototype._transform;
Decipheriv.prototype._flush = Cipher.prototype._flush;
Decipheriv.prototype.update = Cipher.prototype.update; Decipheriv.prototype.update = Cipher.prototype.update;
Decipheriv.prototype.final = Cipher.prototype.final; Decipheriv.prototype.final = Cipher.prototype.final;
Decipheriv.prototype.finaltol = Cipher.prototype.final; Decipheriv.prototype.finaltol = Cipher.prototype.final;