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);
}
// <summary>
/// return a SHA1 Hash on PPC and Smartphone
/// </summary>
/// <param name="pass"></param>
/// <returns></returns>
public static byte[] Sha1Hash(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_SHA1, IntPtr.Zero, 0, out hHash);
byte [] publicKey = pass;
int publicKeyLen = publicKey.Length;
retVal = WinCeApi.CryptHashData(hHash, publicKey, publicKeyLen, 0);
int bufferLen = 20; // 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);
}