public static System.Security.Cryptography.SHA1 GetGen3RuntimeDataHasher()
{
var sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
sha1.TransformBlock(kSha1Salt, 0, kSha1Salt.Length, null, 0);
return(sha1);
}
/// <summary>
/// calculate sha-1 of the audio data
/// </summary>
public override byte[] CalculateAudioSHA1()
{
using (Stream stream = OpenAudioStream())
{
// This is one implementation of the abstract class SHA1.
System.Security.Cryptography.SHA1 sha = new System.Security.Cryptography.SHA1CryptoServiceProvider();
uint numLeft = _payloadNumBytes;
const int size = 4096;
byte[] bytes = new byte[4096];
int numBytes;
while (numLeft > 0)
{
// read a whole block, or to the end of the file
numBytes = stream.Read(bytes, 0, size);
// audio ends on or before end of this read; exit loop and checksum what we have.
if (numLeft <= numBytes)
{
break;
}
sha.TransformBlock(bytes, 0, size, bytes, 0);
numLeft -= (uint)numBytes;
}
sha.TransformFinalBlock(bytes, 0, (int)numLeft);
byte[] result = sha.Hash;
return(result);
}
}
/// <summary>
/// calculate sha-1 of the audio data
/// </summary>
public override byte[] CalculateAudioSHA1()
{
using (Stream stream = OpenAudioStream())
{
// This is one implementation of the abstract class SHA1.
System.Security.Cryptography.SHA1 sha = new System.Security.Cryptography.SHA1CryptoServiceProvider();
uint numLeft = _payloadNumBytes;
const int size = 4096;
byte[] bytes = new byte[4096];
int numBytes;
while (numLeft > 0)
{
// read a whole block, or to the end of the file
numBytes = stream.Read(bytes, 0, size);
// audio ends on or before end of this read; exit loop and checksum what we have.
if (numLeft <= numBytes)
break;
sha.TransformBlock(bytes, 0, size, bytes, 0);
numLeft -= (uint)numBytes;
}
sha.TransformFinalBlock(bytes, 0, (int)numLeft);
byte[] result = sha.Hash;
return result;
}
}
