Create a Dockerfile

Write a Dockerfile which inherits from Centos:7 image, and has
the latest GnuPG installed.

Author: skalee

.dockerignore

@@ -0,0 +1,2 @@
+.git
+

Dockerfile

@@ -0,0 +1,12 @@
+FROM centos:7
+
+ARG GNUPG_VERSION=latest
+ARG CONFIGURE_OPTS="--enable-gpg2-is-gpg"
+
+RUN yum install -y bzip2 gcc make sudo ncurses-devel
+
+WORKDIR /usr/local/src/gpg-build-scripts
+COPY . .
+RUN ./install_gpg_all.sh --suite-version "${GNUPG_VERSION}" --sudo --configure-opts "${CONFIGURE_OPTS}"
+
+WORKDIR /root

docker.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -e # Early exit if any command returns non-zero status code
+set -v # Print executed lines
+
+# This example shows how to use GnuPG Docker image.
+
+###############
+#    SETUP    #
+###############
+
+docker build -t gnupg:latest --build-arg GNUPG_VERSION=latest .
+docker build -t gnupg:2.2    --build-arg GNUPG_VERSION=2.2 .
+docker build -t gnupg:2.1    --build-arg GNUPG_VERSION=2.1 .
+
+###############
+#    TESTS    #
+###############
+
+# Assert installed versions…
+# (All images are configured to have GnuPG executable at /usr/local/bin/gpg)
+docker run -i gnupg:latest gpg --version | head -n 1 | cut -d" " -f 3 | grep -xE "2\.2\.[0-9]+"
+docker run -i gnupg:2.2    gpg --version | head -n 1 | cut -d" " -f 3 | grep -xE "2\.2\.[0-9]+"
+docker run -i gnupg:2.1    gpg --version | head -n 1 | cut -d" " -f 3 | grep -xE "2\.1\.[0-9]+"
+
+# Assert that it works (is capable of clearsigning files)…
+docker run -i gnupg:latest /bin/bash > signed.out <<-SH
+	gpg --gen-key --batch <<-KEY_PARAMS
+		%no-protection
+		Key-Type: RSA
+		Key-Usage: sign, cert
+		Key-Length: 2048
+		Subkey-Type: RSA
+		Subkey-Length: 2048
+		Subkey-Usage: encrypt
+		Name-Real: Some User
+		Name-Email: [email protected]
+		Name-Comment: Without passphrase
+		Expire-Date: 0
+	KEY_PARAMS
+
+	echo "it is very important" > ~/important.txt
+
+	gpg --clearsign ~/important.txt
+
+	cat ~/important.txt.asc
+SH
+
+grep signed.out -xe "-----BEGIN PGP SIGNED MESSAGE-----"
+grep signed.out -xe "it is very important"