Mercurial > projects > dcrypt

comparison dcrypt/crypto/prngs/PRNGFromHash.d @ 16:703901987976

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Removed default of SHA256 for PRNGFromHash.
author Thomas Dixon <reikon@reikon.us>
date Wed, 19 Nov 2008 19:44:44 -0500
parents 5ce3012f1def
children 8b5eaf3c2979
comparison
equal deleted inserted replaced
15:0de48552be35 16:703901987976
8 8
9 module dcrypt.crypto.prngs.PRNGFromHash; 9 module dcrypt.crypto.prngs.PRNGFromHash;
10 10
11 import dcrypt.crypto.PRNG; 11 import dcrypt.crypto.PRNG;
12 import dcrypt.crypto.Hash; 12 import dcrypt.crypto.Hash;
13 import dcrypt.crypto.hashes.SHA256;
14 13
15 /** Creates a PRNG from a hash function. */ 14 /** Creates a PRNG from a hash function. */
16 class PRNGFromHash : PRNG { 15 class PRNGFromHash : PRNG {
17 private { 16 private {
18 const uint COUNTER_SIZE = 32; 17 const uint COUNTER_SIZE = 32;
29 throw new NotInitializedError(name()~": PRNG not initialized"); 28 throw new NotInitializedError(name()~": PRNG not initialized");
30 29
31 return hash.name~"PRNG"; 30 return hash.name~"PRNG";
32 } 31 }
33 32
34 this(Hash hash=null) { 33 this(Hash hash) {
35 this.hash = (hash is null) ? new SHA256() : hash; 34 if (hash is null)
35 throw new InvalidParameterError(
36 name()~": Invalid parameter passed to constructor.");
37 this.hash = hash;
36 this.hash.reset(); 38 this.hash.reset();
37 39
38 counter = new ubyte[COUNTER_SIZE]; 40 counter = new ubyte[COUNTER_SIZE];
39 seed = new ubyte[this.hash.digestSize]; 41 seed = new ubyte[this.hash.digestSize];
40 state = new ubyte[this.hash.digestSize]; 42 state = new ubyte[this.hash.digestSize];