sign

Description:

public virtual int sign (bool detach, string userid, Stream istream, Stream ostream) throws Error

Signs the input stream and writes the resulting signature to the output stream.

this	a CryptoContext
detach	true if `ostream` should be the detached signature; otherwise, false
userid	private key to use to sign the stream
istream	input stream
ostream	output stream

the DigestAlgo used on success or %-1 on fail.