private byte [] _GetRandomBytes(byte[] seed)
{
IntPtr prov;
bool retVal = WinCeApi.CryptAcquireContext(out prov, null, null, (int)WinCeApi.SecurityProviderType.RSA_FULL, 0);
retVal = _CryptGenRandom(prov, seed.Length, seed);
WinCeApi.CryptReleaseContext(prov, 0);
return(seed);
}
private bool _CryptGenRandom(IntPtr hProv, int dwLen, byte[] pbBuffer)
{
if (System.Environment.OSVersion.Platform == PlatformID.WinCE)
{
return(WinCeApi.CryptGenRandomCe(hProv, dwLen, pbBuffer));
}
else
{
return(WinCeApi.CryptGenRandomXp(hProv, dwLen, pbBuffer));
}
}
/// <summary>
/// omputes the MD5 hash value for the specified byte array.
/// </summary>
/// <param name="pass">The input for which to compute the hash code.</param>
/// <returns>The computed hash code.</returns>
public static byte[] MD5Hash(byte[] pass)
{
IntPtr hProv;
bool retVal = WinCeApi.CryptAcquireContext(out hProv, null, null, (int)WinCeApi.SecurityProviderType.RSA_FULL, 0);
IntPtr hHash;
retVal = WinCeApi.CryptCreateHash(hProv, (int)WinCeApi.SecurityProviderType.CALG_MD5, IntPtr.Zero, 0, out hHash);
byte [] publicKey = pass;
int publicKeyLen = publicKey.Length;
retVal = WinCeApi.CryptHashData(hHash, publicKey, publicKeyLen, 0);
int bufferLen = 16; // SHA1 size
byte [] buffer = new byte[bufferLen];
retVal = WinCeApi.CryptGetHashParam(hHash, (int)WinCeApi.SecurityProviderType.HP_HASHVAL, buffer, ref bufferLen, 0);
retVal = WinCeApi.CryptDestroyHash(hHash);
retVal = WinCeApi.CryptReleaseContext(hProv, 0);
return(buffer);
}
