crypto: crypto.create* - argument "options" is undocumented

[refack]

• Version: *
• Platform: *
• Subsystem: crypto

• crypto.createCipher
• createCipheriv
• createDecipher
• createDecipheriv
• createHash
• createHmac
• createSign
• createVerify

have a last optional argument options to control their stream behaviour

/cc @nodejs/documentation @nodejs/crypto @nodejs/streams

[ashanhol]

To clarify @refack, these options are the OpenSSL options?
These are strings, correct?

Edit: If so, will submit a PR with these changes.

[refack]

AFAICT from looking at the code, they are also stream options, as these methods wrap the underlining OpenSSL mechanism with a node transform stream.
For example:

node/lib/crypto.js

Lines 75 to 81 in 0d22858

	exports.createHash = exports.Hash = Hash;
	function Hash(algorithm, options) {
	if (!(this instanceof Hash))
	return new Hash(algorithm, options);
	this._handle = new binding.Hash(algorithm);
	LazyTransform.call(this, options);
	}

where LazyTransform is

node/lib/internal/streams/lazy_transform.js

Lines 12 to 17 in 0d22858

	function LazyTransform(options) {
	this._options = options;
	this.writable = true;
	this.readable = true;
	}
	util.inherits(LazyTransform, stream.Transform);

[refack]

@ashanhol thanks for taking this on 🥇
There's an extra credit exercise to follow this up, but it requires some git spelunking, so it could wait for a future PR.

[ashanhol]

Thanks @refack for your comments, they really helped. It's sometimes difficult to determine types.
I updated the branch and will submit a PR. I'm definitely down for the extra credit.

[ashanhol]

@refack with the PR in works and waiting on the second round of approval, I'm available to jump into the next issue you had in mind.