Extract Key Data from GPG

bit_width.txt

enc_oaep_bi_552_by_27_ch_69.txt
enc_pkcs_bi_552_by_58_ch_69.txt
enc_oaep_bi_528_by_24_ch_66.txt
enc_pkcs_bi_528_by_55_ch_66.txt

b64    = ceil ( cipher * 4/3 )
cipher = bits / 8
bits   = 8 * (text + pack)
pack   = 11 #pkcs
pack   = 42 #oaep

enc.sh

function mkP12 {
    echo 'Making P12' 1>&3
    openssl pkcs12 -export -nocerts -inkey <(mkPrivKey) -password pass:"$locKeyPass"
    echo 'Made P12' 1>&3
}

function gptImp {
    echo 'Importing with gpg-protect-tool' 1>&3
    gpg-protect-tool -P "$locKeyPass" --store --force --p12-import -
    echo 'Imported with gpg-protect-tool' 1>&3
}

function mkPrivKey {
	echo "Making $locBits bit Private Key" 1>&3
	openssl genrsa $locBits
	echo "Made $locBits bit Private Key" 1>&3
}

function errCat {
	echo "Catting to STDERR" 1>&3
	cat 1>&2
	echo "Catted to STDERR" 1>&3
}

function cleanKgrip {
	echo "Cleaning Keygrip without Cert" 1>&3
	local locArray="init"
	IFS=":" read -ra locArray <<< "$locKeygrip"
	locKeygrip=$(echo -n ${locArray[2]} | tr -d '[[:space:]]')
	echo "Cleaned Keygrip without Cert" 1>&3
}

function _main {
	echo "Begin main"
	local locKeyPass="init"
	local locVerPass="init_"
	local locBits="init"
	local locKeygrip="init"
	echo "Enter how many bits wide you want this key."
	echo -n "Bits: "
	read locBits
	echo "Enter a password for this key.  You will be prompted again, sorry."
	echo -n "Password: "
	read -s locKeyPass
	echo ""
	echo -n "Verify: "
	read -s locVerPass
	echo ""
	if [ "$locKeyPass" != "$locVerPass" ]; then
		echo "ERR: password mismatch"
		exit 1
	fi
	exec 3>&2 # copy fd2 to fd3
	exec 2> err.log # copy err.log to 2
	locKeygrip=$(mkP12 | gptImp 2>&1 | tee >(errCat) | grep keygrip)
	cleanKgrip
	unset locKeyPass
	unset locVerPass
	unset locBits
	#unset locKeygrip
	exec 2>&3 # copy fd3 to fd2
	exec 3>&- # close fd3
	echo "End main: $locKeygrip"
}

_main

Notes.txt

1) Create a key in Openssl (openssl genrsa)
2) Dump Key matter (https://www.openssl.org/docs/apps/asn1parse.html)
3) Import it into GpgSM (http://www.sysmic.org/dotclear/index.php?post/2010/03/24/Convert-keys-betweens-GnuPG%2C-OpenSsh-and-OpenSSL)
4) Import into gpg (gpg --edit-key addkey {from existing fingerprint})
5) Dump Key matter (gpg --export {keyid} | gpg --list-packets --debug-all)
6) Export to OpenSSL (http://www.sysmic.org/dotclear/index.php?post/2010/03/24/Convert-keys-betweens-GnuPG%2C-OpenSsh-and-OpenSSL)
7) Dump Key matter (https://www.openssl.org/docs/apps/asn1parse.html)

PublicKey: https://tools.ietf.org/html/rfc2313#section-7.1
PrivateKey: https://tools.ietf.org/html/rfc2313#section-7.2

gpg-protect-tool --armor -u %appdata%\gnupg\private-keys-v1.d\{keygrip}.key ^
| gpg-protect-tool.exe --p12-export -P {pipepass} ^
| openssl pkcs12 -nodes -nocerts -passin pass:pipepass ^
| openssl asn1parse -strparse 22

>gpgsm --debug-all --import priv_528.p12 2>&1 | findstr /i keygrip
<gpgsm: DBG: keygrip= 2D C1 91 45 6D BD CD 97 F1 33 17 B1 DF 78 61 A9 0E 11 BE AE

gpg --expert --edit-key TestKey addkey 13 2DC191456DBDCD97F13317B1DF7861A90E11BEAE s q 0 y y save

scripting edit-key
https://lists.gnupg.org/pipermail/gnupg-devel/2002-April/018255.html