protected override void HashCore(byte[] array, int ibStart, int cbSize)
{
if (HashValue is null)
{
Initialize();
}
_digest.BlockUpdate(array, ibStart, cbSize);
}
static byte[] Sha224(byte[] dat)
{
Sha224Digest digester = new Sha224Digest();
byte[] retValue = new byte[digester.GetDigestSize()];
digester.BlockUpdate(dat, 0, dat.Length);
digester.DoFinal(retValue, 0);
return(retValue);
}
public static byte[] Hash224(byte[] bytes)
{
var digest = new Sha224Digest();
var output = new byte[digest.GetDigestSize()];
digest.BlockUpdate(bytes, 0, bytes.Length);
digest.DoFinal(output, 0);
return(output);
}
private byte[] _PasswordToKey(byte[] password, byte[] engineId)
{
Sha224Digest sha = new Sha224Digest();
{
var passwordIndex = 0;
var count = 0;
/* Use while loop until we've done 1 Megabyte */
var sourceBuffer = new byte[1048576];
var buf = new byte[64];
while (count < 1048576)
{
for (var i = 0; i < 64; ++i)
{
// Take the next octet of the password, wrapping
// to the beginning of the password as necessary.
buf[i] = password[passwordIndex++ % password.Length];
}
Buffer.BlockCopy(buf, 0, sourceBuffer, count, buf.Length);
count += 64;
}
var digest = new byte[sha.GetDigestSize()];
sha.BlockUpdate(sourceBuffer, 0, sourceBuffer.Length);
sha.DoFinal(digest, 0);
using (var buffer = new MemoryStream())
{
buffer.Write(digest, 0, digest.Length);
buffer.Write(engineId, 0, engineId.Length);
buffer.Write(digest, 0, digest.Length);
var input = buffer.ToArray();
sha.BlockUpdate(input, 0, input.Length);
sha.DoFinal(digest, 0);
return(digest);
}
}
}
public ITestResult Perform()
{
IDigest digest = new Sha224Digest();
byte[] resBuf = new byte[digest.GetDigestSize()];
string resStr;
//
// test 1
//
digest.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec1.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 1"
+ SimpleTest.NewLine
+ " expected: " + resVec1
+ SimpleTest.NewLine
+ " got : " + resStr));
}
//
// test 2
//
byte[] bytes = Hex.Decode(testVec2);
digest.BlockUpdate(bytes, 0, bytes.Length);
digest.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec2.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 2"
+ SimpleTest.NewLine
+ " expected: " + resVec2
+ SimpleTest.NewLine
+ " got : " + resStr));
}
//
// test 3
//
bytes = Hex.Decode(testVec3);
digest.BlockUpdate(bytes, 0, bytes.Length);
digest.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec3.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 3"
+ SimpleTest.NewLine
+ " expected: " + resVec3
+ SimpleTest.NewLine
+ " got : " + resStr));
}
//
// test 4
//
bytes = Hex.Decode(testVec4);
digest.BlockUpdate(bytes, 0, bytes.Length);
digest.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec4.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 4"
+ SimpleTest.NewLine
+ " expected: " + resVec4
+ SimpleTest.NewLine
+ " got : " + resStr));
}
//
// test 5
//
bytes = Hex.Decode(testVec4);
digest.BlockUpdate(bytes, 0, bytes.Length / 2);
// clone the IDigest
IDigest d = new Sha224Digest((Sha224Digest)digest);
digest.BlockUpdate(bytes, bytes.Length / 2, bytes.Length - bytes.Length / 2);
digest.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec4.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 5"
+ SimpleTest.NewLine
+ " expected: " + resVec4
+ SimpleTest.NewLine
+ " got : " + resStr));
}
d.BlockUpdate(bytes, bytes.Length / 2, bytes.Length - bytes.Length / 2);
d.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec4.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 5"
+ SimpleTest.NewLine
+ " expected: " + resVec4
+ SimpleTest.NewLine
+ " got : " + resStr));
}
// test 6
bytes = Hex.Decode(testVec5);
for (int i = 0; i < 100000; i++)
{
digest.BlockUpdate(bytes, 0, bytes.Length);
}
digest.DoFinal(resBuf, 0);
resStr = Hex.ToHexString(resBuf);
if (!resVec5.Equals(resStr))
{
return(new SimpleTestResult(false,
"SHA-224 failing standard vector test 6"
+ SimpleTest.NewLine
+ " expected: " + resVec5
+ SimpleTest.NewLine
+ " got : " + resStr));
}
return(new SimpleTestResult(true, Name + ": Okay"));
}