/// <summary>
/// Calls EVP_SignFinal()
/// </summary>
/// <param name="md"></param>
/// <param name="bio"></param>
/// <param name="pkey"></param>
/// <returns></returns>
public static byte[] Sign(MessageDigest md, BIO bio, CryptoKey pkey)
{
BIO bmd = BIO.MessageDigest(md);
bmd.Push(bio);
while (true)
{
ArraySegment <byte> bytes = bmd.ReadBytes(1024 * 4);
if (bytes.Count == 0)
{
break;
}
}
MessageDigestContext ctx = new MessageDigestContext(bmd);
byte[] sig = new byte[pkey.Size];
uint len = (uint)sig.Length;
Native.ExpectSuccess(Native.EVP_SignFinal(ctx.Handle, sig, ref len, pkey.Handle));
byte[] ret = new byte[len];
Buffer.BlockCopy(sig, 0, ret, 0, (int)len);
return(ret);
}
/// <summary>
/// Calls EVP_VerifyFinal()
/// </summary>
/// <param name="md"></param>
/// <param name="bio"></param>
/// <param name="sig"></param>
/// <param name="pkey"></param>
/// <returns></returns>
public static bool Verify(MessageDigest md, BIO bio, byte[] sig, CryptoKey pkey)
{
BIO bmd = BIO.MessageDigest(md);
bmd.Push(bio);
while (true)
{
ArraySegment <byte> bytes = bmd.ReadBytes(1024 * 4);
if (bytes.Count == 0)
{
break;
}
}
MessageDigestContext ctx = new MessageDigestContext(bmd);
int ret = Native.ExpectSuccess(Native.EVP_VerifyFinal(ctx.Handle, sig, (uint)sig.Length, pkey.Handle));
return(ret == 1);
}