letsencrypt-sh 1st try.

app-crypt/letsencrypt-sh/Manifest

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+AUX config 3462 SHA256 136b58603704228d958ffaf62029d7fc9b2eba2cf86c7eb01dc9f5e88191c523 SHA512 75b635b3b32169888474eb6d2dbe845bf8d1380229f2fb2ae34e5b83ee2aac4b48ee853b4d0bc4636d7a8c0b0f8f7da171aa93a315114afd455106f804b2b530 WHIRLPOOL 8bc1389915fd2ec17e253d5af16fbd933de757c21bcf409d6df737464db3da682a6514b56254bd002f8c943c0c00e1df96803d6f6bd1d29a41d53e02c5b2cefa
+AUX nginx.conf 74 SHA256 253a91301d18b47aa0934c3700da94b4c5f3a6125f2e713a2768d92cc3f00c84 SHA512 66149bb5e854af4dfada0d3446481071081fe4387771935c6bcf2be204d6d054209b0397e08093e767cb921de61b225c21be2f0ebe8b8eb0b7ce332fc63f08d2 WHIRLPOOL 8e32692a36c1a2bbdb86e8c087b9f9244ac84e9527f4659317bc2d3095a570d362b7a8dfc553facb423b7821bb569f0c2932ed5a2307def824c2b7598498761e
+EBUILD letsencrypt-sh-9999.ebuild 936 SHA256 7ba628d6ee2c47ac61b3a0d8876ac800c28d140643dfcacc42a3444c166d9146 SHA512 16329e9991fb9151bce97b6b7778ca8e354f91fd812c18cdda7dc223efd6b81fb3bc046c08990bd7686396356dc962d1aaeb7c41d883dd248628d77fc7eb6c9b WHIRLPOOL 29e5f2ac856dec03e5d0cc3ffcaa65e96e63aa13b9dc5030bf0b0723081577261d64a2645fc8c305c8a74e7ade9ac0d21a837f4f7f60b0c8bd948a90c2fa5b3a

app-crypt/letsencrypt-sh/files/config

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+########################################################
+# This is the main config file for letsencrypt.sh      #
+#                                                      #
+# This file is looked for in the following locations:  #
+# $SCRIPTDIR/config (next to this script)              #
+# /usr/local/etc/letsencrypt.sh/config                 #
+# /etc/letsencrypt.sh/config                           #
+# ${PWD}/config (in current working-directory)         #
+#                                                      #
+# Default values of this config are in comments        #
+########################################################
+
+# Path to certificate authority (default: https://acme-v01.api.letsencrypt.org/directory)
+#CA="https://acme-v01.api.letsencrypt.org/directory"
+#CA="https://acme-staging.api.letsencrypt.org/directory"
+
+# Path to license agreement (default: https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf)
+#LICENSE="https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"
+
+# Which challenge should be used? Currently http-01 and dns-01 are supported
+#CHALLENGETYPE="http-01"
+
+# Path to a directory containing additional config files, allowing to override
+# the defaults found in the main configuration file. Additional config files
+# in this directory needs to be named with a '.sh' ending.
+# default: <unset>
+#CONFIG_D=
+
+# Base directory for account key, generated certificates and list of domains (default: $SCRIPTDIR -- uses config directory if undefined)
+#BASEDIR=$SCRIPTDIR
+
+# File containing the list of domains to request certificates for (default: $BASEDIR/domains.txt)
+#DOMAINS_TXT="${BASEDIR}/domains.txt"
+
+# Output directory for generated certificates
+#CERTDIR="${BASEDIR}/certs"
+CERTDIR="/etc/ssl/letsencrypt"
+
+# Directory for account keys and registration information
+#ACCOUNTDIR="${BASEDIR}/accounts"
+
+# Output directory for challenge-tokens to be served by webserver or deployed in HOOK (default: $BASEDIR/.acme-challenges)
+#WELLKNOWN="${BASEDIR}/.acme-challenges"
+WELLKNOWN=/var/www/letsencrypt
+
+# Default keysize for private keys (default: 4096)
+#KEYSIZE="4096"
+
+# Path to openssl config file (default: <unset> - tries to figure out system default)
+#OPENSSL_CNF=
+
+# Program or function called in certain situations
+#
+# After generating the challenge-response, or after failed challenge (in this case altname is empty)
+# Given arguments: clean_challenge|deploy_challenge altname token-filename token-content
+#
+# After successfully signing certificate
+# Given arguments: deploy_cert domain path/to/privkey.pem path/to/cert.pem path/to/fullchain.pem
+#
+# BASEDIR and WELLKNOWN variables are exported and can be used in an external program
+# default: <unset>
+#HOOK=
+
+# Chain clean_challenge|deploy_challenge arguments together into one hook call per certificate (default: no)
+#HOOK_CHAIN="no"
+
+# Minimum days before expiration to automatically renew certificate (default: 30)
+#RENEW_DAYS="30"
+
+# Regenerate private keys instead of just signing new certificates on renewal (default: yes)
+#PRIVATE_KEY_RENEW="yes"
+
+# Which public key algorithm should be used? Supported: rsa, prime256v1 and secp384r1
+#KEY_ALGO=rsa
+
+# E-mail to use during the registration (default: <unset>)
+#CONTACT_EMAIL=
+CONTACT_EMAIL=""
+
+# Lockfile location, to prevent concurrent access (default: $BASEDIR/lock)
+#LOCKFILE="${BASEDIR}/lock"
+
+# Option to add CSR-flag indicating OCSP stapling to be mandatory (default: no)
+#OCSP_MUST_STAPLE="no"
+

app-crypt/letsencrypt-sh/files/nginx.conf

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+location /.well-known/acme-challenge {
+    alias /var/www/letsencrypt;
+}
+

app-crypt/letsencrypt-sh/letsencrypt-sh-9999.ebuild

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+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit git-r3
+
+DESCRIPTION="Client for signing certificates with an ACME-server implemented as a relatively simple bash-script"
+HOMEPAGE="https://github.com/lukas2511/letsencrypt.sh"
+EGIT_REPO_URI="https://github.com/lukas2511/letsencrypt.sh.git"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="nginx"
+
+DEPEND=""
+RDEPEND="
+		sys-apps/coreutils
+		net-misc/curl
+		dev-libs/openssl
+"
+
+DOCS=( README.md docs/. )
+
+src_install() {
+	dobin letsencrypt.sh
+	docompress -x /usr/share/doc/${PF}/examples
+	default
+
+	ETCDIR=/etc/letsencrypt.sh
+	insinto ${ETCDIR}
+	doins ${FILESDIR}/config
+	touch ${D}${ETCDIR}/domains.txt
+	keepdir /etc/ssl/letsencrypt
+	keepdir /var/www/letsencrypt
+	if use nginx ; then
+		mkdir -p ${D}/etc/nginx
+		cp ${FILESDIR}/nginx.conf  ${D}/etc/nginx/letsencrypt.conf
+    fi
+}
+
+src_test() {
+	./test.sh
+}