<dd>Calculate the message digest for <em>data</em> or file <em>filename</em>
	using <em>type</em> hash algorithm. Returns value as a hex string
	(default) or as a binary value with <em>-bin</em> option. Using
	<em>-chan</em> option, a stacked channel is created and data read
	from the channel is used to calculate a message digest with the result
	returned with the last read operation before EOF. Use <em>-key</em> to
	specify the key and return a Hashed Message Authentication Code (HMAC).
	To salt a password, append or prepend the salt text to the password.
	Type can be any OpenSSL supported hash algorithm including: <b>md4</b>,
	<b>md5</b>, <b>sha1</b>, <b>sha256</b>, <b>sha512</b>, <b>sha3-256</b>,
	etc. See <b>tls::digests</b> command for a full list.</dd>

    <dt><a name="tls::digests"><strong>tls::digests</strong></a></dt>
    <dd>Returns a list of the hash algorithms for <b>tls::digest</b> command.</dd>

/*
 * Digest Command and Stacked Transform Channel
 *
 * Copyright (C) 2023 Brian O'Hagan
 *
 */

	tls::digest md5 -key "Example key" -data "Example string for message digest tests."
    } -result {901DA6E6976A71650C77443C37FF9C7F}

test Digest_HMAC-10.2 {file} -body {
	tls::digest md5 -key "Example key" -file md_data.dat
    } -result {901DA6E6976A71650C77443C37FF9C7F}

test Digest_HMAC-10.3 {channel} -constraint {knownBug} -body {
test Digest_HMAC-10.3 {channel} -constraints {knownBug} -body {
	read_chan md5 md_data.dat -key "Example key"
    } -result {901DA6E6976A71650C77443C37FF9C7F}

test Digest_HMAC-10.4 {data bin} -body {
	string toupper [binary encode hex [tls::digest md5 -bin -key "Example key" -data "Example string for message digest tests."]]
    } -result {901DA6E6976A71650C77443C37FF9C7F}
# Test list protocols