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comparison dcrypt/crypto/ciphers/Blowfish.d @ 14:5ce3012f1def

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Removed some redundancy in code. Added NotSupportedError, a base PRNG class and a class which creates a PRNG from a hash function. Changed the MAC class' finalization methods to digest and hexDigest instead of finish and hexFinish respectively. Also added a base Checksum class, crc32 and adler32 in dcrypt.misc as per request.
author Thomas Dixon <reikon@reikon.us>
date Tue, 18 Nov 2008 18:03:40 -0500
parents 8c7f8fecdd75
children 3a57367afe34
comparison
equal deleted inserted replaced
13:7ea528b61802 14:5ce3012f1def
207 MAX_KEY_SIZE = 56, // 448 bits 207 MAX_KEY_SIZE = 56, // 448 bits
208 MIN_KEY_SIZE = 4; // 32 bits 208 MIN_KEY_SIZE = 4; // 32 bits
209 uint[18] P; 209 uint[18] P;
210 uint[256] S0, S1, S2, S3; 210 uint[256] S0, S1, S2, S3;
211 ubyte[] workingKey; 211 ubyte[] workingKey;
212 bool initialized,
213 encrypt;
214 } // end private 212 } // end private
215 213
216 char[] name() { 214 char[] name() {
217 return "Blowfish"; 215 return "Blowfish";
218 } 216 }
224 void init(bool encrypt, CipherParameters params) { 222 void init(bool encrypt, CipherParameters params) {
225 SymmetricKey keyParams = cast(SymmetricKey)params; 223 SymmetricKey keyParams = cast(SymmetricKey)params;
226 if (!keyParams) 224 if (!keyParams)
227 throw new InvalidParameterError( 225 throw new InvalidParameterError(
228 name()~": Invalid parameter passed to init"); 226 name()~": Invalid parameter passed to init");
229 this.encrypt = encrypt; 227 _encrypt = encrypt;
230 228
231 uint len = keyParams.key.length; 229 uint len = keyParams.key.length;
232 if (len < MIN_KEY_SIZE || len > MAX_KEY_SIZE) 230 if (len < MIN_KEY_SIZE || len > MAX_KEY_SIZE)
233 throw new InvalidKeyError( 231 throw new InvalidKeyError(
234 name()~": Invalid key length (requires 4-56 bytes)"); 232 name()~": Invalid key length (requires 4-56 bytes)");
239 S3[] = S_INIT[768..1024]; 237 S3[] = S_INIT[768..1024];
240 P[] = P_INIT[]; 238 P[] = P_INIT[];
241 239
242 workingKey = keyParams.key; 240 workingKey = keyParams.key;
243 // Yes, this is ghetto. I know. 241 // Yes, this is ghetto. I know.
244 initialized = true; 242 _initialized = true;
245 setup(workingKey); 243 setup(workingKey);
246 244
247 if (!encrypt) 245 if (!_encrypt)
248 P.reverse; // Oh yes I did. 246 P.reverse; // Oh yes I did.
249 } 247 }
250 248
251 private uint F(uint x) { 249 private uint F(uint x) {
252 return (((S0[(x >> 24)] 250 return (((S0[(x >> 24)]
254 ^ S2[cast(ubyte)(x >> 8)]) 252 ^ S2[cast(ubyte)(x >> 8)])
255 + S3[cast(ubyte)x]); 253 + S3[cast(ubyte)x]);
256 } 254 }
257 255
258 uint update(void[] input_, void[] output_) { 256 uint update(void[] input_, void[] output_) {
259 if (!initialized) 257 if (!_initialized)
260 throw new NotInitializedError(name()~": Cipher not initialized."); 258 throw new NotInitializedError(name()~": Cipher not initialized.");
261 259
262 ubyte[] input = cast(ubyte[]) input_, 260 ubyte[] input = cast(ubyte[]) input_,
263 output = cast(ubyte[]) output_; 261 output = cast(ubyte[]) output_;
264 262