From 3a529129641b6fa7e4c0db720e7b5964989bfa43 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <mail@daniel-baumann.ch>
Date: Mon, 3 Jan 2022 14:27:43 +0100
Subject: Adding openssh-tools (WIP).

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>
---
 openssh/bin/ssh-keycheck | 176 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 176 insertions(+)
 create mode 100755 openssh/bin/ssh-keycheck

(limited to 'openssh/bin/ssh-keycheck')

diff --git a/openssh/bin/ssh-keycheck b/openssh/bin/ssh-keycheck
new file mode 100755
index 0000000..737b8cd
--- /dev/null
+++ b/openssh/bin/ssh-keycheck
@@ -0,0 +1,176 @@
+#!/bin/sh
+
+# Open Infrastructure: service-tools
+
+# Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
+#
+# SPDX-License-Identifier: GPL-3.0+
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+set -e
+
+PROJECT="open-infrastructure"
+SOFTWARE="service-tools"
+PROGRAM="ssh-keycheck"
+
+Parameters ()
+{
+	GETOPT_LONGOPTIONS="bits:,filename:,help,type:,verbose,"
+	GETOPT_OPTIONS="b:,f:,h,t:,v,"
+
+	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${PROGRAM} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
+
+	if [ "${?}" != "0" ]
+	then
+		echo "'${PROGRAM}': getopt exit" >&2
+		exit 1
+	fi
+
+	eval set -- "${PARAMETERS}"
+
+	while true
+	do
+		case "${1}" in
+			-b|--bits)
+				BITS="${2}"
+				shift 2
+				;;
+
+			-f|--filename)
+				FILES="${2}"
+				shift 2
+				;;
+
+			-h|--help)
+				HELP="true"
+				shift 1
+				;;
+
+			-t|--type)
+				TYPES="${2}"
+				shift 2
+				;;
+
+			-v|--verbose)
+				VERBOSE="true"
+				shift 1
+				;;
+
+			--)
+				shift 1
+				break
+				;;
+
+			*)
+				echo "'${PROGRAM}': getopt error" >&2
+				exit 1
+				;;
+		esac
+	done
+}
+
+Usage ()
+{
+	echo "Usage: ${PROGRAM} -f KEY_FILE[,KEY_FILE] [-b BITS[,BITS]] [-t TYPE[,TYPE]]" >&2
+	echo
+	echo "See ${PROGRAM}(1) and ${SOFTWARE}(7) for more information."
+
+	exit 1
+}
+
+Parameters "${@}"
+
+if [ -z "${FILES}" ] || [ -n "${HELP}" ]
+then
+	Usage
+fi
+
+EXIT="0"
+
+for FILE in ${FILES}
+do
+	if [ ! -e "${FILE}" ]
+	then
+		echo "'${FILE}': no such key file" >&2
+		exit 1
+	fi
+
+	# Run
+	SSH_KEYGEN="$(ssh-keygen -l -f "${FILE}" 2>&1 || true)"
+
+	KEY_TYPE="$(echo "${SSH_KEYGEN}" | awk '{ print $NF }' | sed -e 's|(||' -e 's|)||' | tr '[A-Z]' '[a-z]')"
+	KEY_BITS="$(echo "${SSH_KEYGEN}" | awk '{ print $1 }')"
+
+	case "${KEY_TYPE}" in
+		dsa|ecdsa|ecdsa-sk|ed25519|ed25519-sk|rsa)
+			;;
+
+		*)
+			case "${VERBOSE}" in
+				true)
+					echo "'${FILE}': invalid key file" >&2
+					;;
+			esac
+
+			KEY_TYPE="unknown"
+			EXIT="1"
+			;;
+	esac
+
+	if [ "${KEY_TYPE}" != "unknown" ] && [ -n "${TYPES}" ]
+	then
+		case "${KEY_TYPE}" in
+			$(echo ${TYPES} | sed -e 's|,| |g'))
+				;;
+
+			*)
+				echo "'${FILE}': wrong type" >&2
+				EXIT="1"
+				;;
+		esac
+	fi
+
+	if [ "${KEY_TYPE}" != "unknown" ] && [ -n "${BITS}" ]
+	then
+		case "${KEY_BITS}" in
+			$(echo ${BITS} | sed -e 's|,| |g'))
+				;;
+
+			*)
+				echo "'${FILE}': wrong bits" >&2
+				EXIT="1"
+				;;
+		esac
+	fi
+
+	case "${EXIT}" in
+		0)
+			case "${VERBOSE}" in
+				true)
+
+cat << EOF
+filename: ${FILE}
+bits: ${KEY_BITS}
+type: ${KEY_TYPE}
+EOF
+
+					;;
+			esac
+			;;
+
+	esac
+done
+
+exit "${EXIT}"
-- 
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