13 lines
500 B
Bash
13 lines
500 B
Bash
#/bin/sh
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set -euo pipefail
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# Validate host:port
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if ! echo $1 | grep -qP '^(((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3})|(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])):\d{1,5}$'; then
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echo "Invalid host:port"
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exit 1
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fi
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echo $((($(echo -n | openssl s_client -connect $1 2>/dev/null | openssl x509 -noout -enddate | sed "s/.*=\(.*\)/\1/" | xargs -I __ date -d "__" +%s) - $(date +%s))/86400))
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