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prowler/lib/common/os_detector
2022-05-25 12:54:15 +02:00

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2018) by Toni de la Fuente
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
DATE_CMD="date"
BASE64_CMD="base64"
gnu_how_older_from_today() {
DATE_TO_COMPARE=$1
TODAY_IN_DAYS=$("$DATE_CMD" -d "$("$DATE_CMD" +%Y-%m-%d)" +%s)
DATE_FROM_IN_DAYS=$("$DATE_CMD" -d $DATE_TO_COMPARE +%s)
DAYS_SINCE=$((($TODAY_IN_DAYS - $DATE_FROM_IN_DAYS )/60/60/24))
echo $DAYS_SINCE
}
bsd_how_older_from_today() {
DATE_TO_COMPARE=$1
TODAY_IN_DAYS=$("$DATE_CMD" +%s)
DATE_FROM_IN_DAYS=$("$DATE_CMD" -jf %Y-%m-%d $DATE_TO_COMPARE +%s)
DAYS_SINCE=$((($TODAY_IN_DAYS - $DATE_FROM_IN_DAYS )/60/60/24))
echo $DAYS_SINCE
}
# function to convert from timestamp to date
# output date format %Y-%m-%d
gnu_timestamp_to_date() {
# if date comes from cli v2 in format like 2020-04-29T10:13:09.191000-04:00, which is ISO8601
# remove fractions of a second
TIMESTAMP_TO_CONVERT=$(cut -f1 -d"." <<< "${1}")
if ! "${DATE_CMD}" -d "${TIMESTAMP_TO_CONVERT}" +%s > /dev/null 2>&1;
then
# If input is epoch use the @
OUTPUT_DATE=$("${DATE_CMD}" -d @"${TIMESTAMP_TO_CONVERT}" +'%Y-%m-%d')
else
# If input is not epoch dont use @
OUTPUT_DATE=$("${DATE_CMD}" -d "${TIMESTAMP_TO_CONVERT}" +'%Y-%m-%d')
fi
echo "${OUTPUT_DATE}"
}
bsd_timestamp_to_date() {
# if date comes from cli v2 in format like 2020-04-29T10:13:09.191000-04:00, which is ISO8601
# remove fractions of a second
TIMESTAMP_TO_CONVERT=$(cut -f1 -d"." <<< "${1}")
OUTPUT_DATE=$("${DATE_CMD}" -jf %Y-%m-%d "${TIMESTAMP_TO_CONVERT}" +%F 2>/dev/null)
echo "${OUTPUT_DATE}"
}
gnu_decode_report() {
"$BASE64_CMD" -d
}
bsd_decode_report() {
"$BASE64_CMD" -D
}
gnu_how_many_days_from_today() {
DATE_TO_COMPARE=$1
TODAY_IN_DAYS=$("$DATE_CMD" -d "$("$DATE_CMD" +%Y-%m-%d)" +%s)
DATE_IN_DAYS=$("$DATE_CMD" -d $DATE_TO_COMPARE +%s)
DAYS_TO=$((( $DATE_IN_DAYS - $TODAY_IN_DAYS )/60/60/24))
echo $DAYS_TO
}
bsd_how_many_days_from_today() {
DATE_TO_COMPARE=$1
TODAY_IN_DAYS=$("$DATE_CMD" +%s)
DATE_IN_DAYS=$("$DATE_CMD" -jf %Y-%m-%d $DATE_TO_COMPARE +%s)
DAYS_TO=$((( $DATE_IN_DAYS - $TODAY_IN_DAYS )/60/60/24))
echo $DAYS_TO
}
gnu_get_date_previous_than_months() {
MONTHS_TO_COMPARE=$1
MONTHS_TO_COMPARE_IN_SECONDS=$(( 60 * 60 * 24 * 31 * $MONTHS_TO_COMPARE ))
CURRENTSECS=$("$DATE_CMD" +%s)
STARTDATEINSECS=$(( $CURRENTSECS - $MONTHS_TO_COMPARE_IN_SECONDS ))
DATE_BEFORE_MONTHS_TO_COMPARE=$("$DATE_CMD" -d @$STARTDATEINSECS '+%Y-%m-%d')
echo $DATE_BEFORE_MONTHS_TO_COMPARE
}
bsd_get_date_previous_than_months() {
MONTHS_TO_COMPARE=$1
DATE_BEFORE_MONTHS_TO_COMPARE=$("$DATE_CMD" -v -$(echo $MONTHS_TO_COMPARE)m '+%Y-%m-%d')
echo $DATE_BEFORE_MONTHS_TO_COMPARE
}
gnu_get_time_in_milliseconds() {
"$DATE_CMD" +%s%3N
}
bsd_get_time_in_milliseconds() {
# BSD date does not support outputting milliseconds, so pad with zeros
"$DATE_CMD" +%s000
}
gnu_get_iso8601_timestamp() {
"$DATE_CMD" -u +"%Y-%m-%dT%H:%M:%SZ"
}
bsd_get_iso8601_timestamp() {
"$DATE_CMD" -u +"%Y-%m-%dT%H:%M:%SZ"
}
gnu_convert_date_to_timestamp() {
# if [ "$OSTYPE" == "linux-musl" ]; then
# date -D "%Y-%m-%dT%H:%M:%SZ" -d "$1" +%s
# else
date -u -d "$1" +%s
# fi
}
bsd_convert_date_to_timestamp() {
echo $(date -u -j -f %Y-%m-%dT%H:%M:%S "$1" +%s)
#date -j -f "%Y-%m-%dT%H:%M:%S" "$1" "+%s"
}
gnu_test_tcp_connectivity() {
HOST=$1
PORT=$2
TIMEOUT=$3
# This is initially for ES port 9300, not not HTTP but I add HTTP error
# codes for better handling, so 200 is open and 000 is not responding
timeout $TIMEOUT bash -c '(echo > /dev/tcp/'$HOST'/'$PORT') >/dev/null 2>&1 && echo "200" || echo "000"'
}
bsd_test_tcp_connectivity() {
HOST=$1
PORT=$2
TIMEOUT=$3
# This is initially for ES port 9300, not not HTTP but I add HTTP error
# codes for better handling, so 200 is open and 000 is not responding
nc -z -G $TIMEOUT $HOST $PORT >/dev/null 2>&1 && echo "200" || echo "000"
}
gnu_replace_sed(){
sed -i $1 $2
}
bsd_replace_sed(){
sed -i '' $1 $2
}
# Functions to manage dates depending on OS
if [ "$OSTYPE" == "linux-gnu" ] || [ "$OSTYPE" == "linux-musl" ]; then
TEMP_REPORT_FILE=$(mktemp -t -p /tmp prowler.cred_report-XXXXXX)
# function to compare in days, usage how_older_from_today date
# date format %Y-%m-%d
how_older_from_today() {
gnu_how_older_from_today "$1"
}
timestamp_to_date() {
gnu_timestamp_to_date "$1"
}
decode_report() {
gnu_decode_report
}
how_many_days_from_today() {
gnu_how_many_days_from_today "$1"
}
get_date_previous_than_months() {
gnu_get_date_previous_than_months "$1"
}
get_time_in_milliseconds() {
gnu_get_time_in_milliseconds
}
get_iso8601_timestamp() {
gnu_get_iso8601_timestamp
}
test_tcp_connectivity() {
gnu_test_tcp_connectivity "$1" "$2" "$3"
}
convert_date_to_timestamp() {
gnu_convert_date_to_timestamp "$1"
}
replace_sed() {
gnu_replace_sed $1 $2
}
elif [[ "$OSTYPE" == "darwin"* ]] || [[ "$OSTYPE" == "freebsd"* ]]; then
# BSD/OSX commands compatibility
TEMP_REPORT_FILE=$(mktemp -t prowler.cred_report-XXXXXX)
# It is possible that the user has installed GNU coreutils on OS X. By default, this will make GNU commands
# available with a 'g' prefix, e.g. 'gdate'. Test if this is present, and use it if so, as it supports more features.
# The user also may have replaced the default Mac OS X BSD tools with the GNU coreutils equivalents.
# Only GNU date/base64 allows --version as a valid argument, so use the validity of this argument
# as a means to detect that coreutils is installed and is overriding the default tools
GDATE=$(which gdate)
if [ -n "${GDATE}" ]; then
DATE_CMD="gdate"
fi
GBASE64=$(which gbase64)
if [ -n "${GBASE64}" ]; then
BASE64_CMD="gbase64"
fi
if "$DATE_CMD" --version >/dev/null 2>&1 ; then
how_older_from_today() {
gnu_how_older_from_today "$1"
}
timestamp_to_date() {
gnu_timestamp_to_date "$1"
}
how_many_days_from_today() {
gnu_how_many_days_from_today "$1"
}
get_date_previous_than_months() {
gnu_get_date_previous_than_months "$1"
}
get_time_in_milliseconds() {
gnu_get_time_in_milliseconds
}
get_iso8601_timestamp() {
gnu_get_iso8601_timestamp
}
convert_date_to_timestamp() {
gnu_convert_date_to_timestamp "$1"
}
else
how_older_from_today() {
bsd_how_older_from_today "$1"
}
timestamp_to_date() {
bsd_timestamp_to_date "$1"
}
how_many_days_from_today() {
bsd_how_many_days_from_today "$1"
}
get_date_previous_than_months() {
bsd_get_date_previous_than_months "$1"
}
get_time_in_milliseconds() {
bsd_get_time_in_milliseconds
}
get_iso8601_timestamp() {
bsd_get_iso8601_timestamp
}
convert_date_to_timestamp() {
bsd_convert_date_to_timestamp "$1"
}
fi
if "$BASE64_CMD" --version >/dev/null 2>&1 ; then
decode_report() {
gnu_decode_report
}
else
decode_report() {
bsd_decode_report
}
fi
test_tcp_connectivity() {
bsd_test_tcp_connectivity "$1" "$2" "$3"
}
replace_sed() {
bsd_replace_sed $1 $2
}
elif [[ "$OSTYPE" == "cygwin" ]]; then
# POSIX compatibility layer and Linux environment emulation for Windows
TEMP_REPORT_FILE=$(mktemp -t -p /tmp prowler.cred_report-XXXXXX)
how_older_from_today() {
gnu_how_older_from_today "$1"
}
timestamp_to_date() {
gnu_timestamp_to_date "$1"
}
decode_report() {
gnu_decode_report
}
how_many_days_from_today() {
gnu_how_many_days_from_today "$1"
}
get_date_previous_than_months() {
gnu_get_date_previous_than_months "$1"
}
get_time_in_milliseconds() {
gnu_get_time_in_milliseconds
}
get_iso8601_timestamp() {
gnu_get_iso8601_timestamp
}
test_tcp_connectivity() {
gnu_test_tcp_connectivity "$1" "$2" "$3"
}
convert_date_to_timestamp() {
gnu_convert_date_to_timestamp "$1"
}
replace_sed() {
gnu_replace_sed $1 $2
}
else
echo "Unknown Operating System! Valid \$OSTYPE: linux-gnu, linux-musl, darwin* or cygwin"
echo "Found: $OSTYPE"
EXITCODE=1
exit $EXITCODE
fi