40 lines
699 B
Bash
40 lines
699 B
Bash
#!/bin/sh
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usage()
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{
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printf "Usage: %s [-c curve] [-d days] domain\n" "${0##*/}" >&2
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exit 1
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}
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tonumber()
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{
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printf "%u\n" "$*"
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}
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curve=secp384r1
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days=3650
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while getopts c:d: flag; do
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case $flag in
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c) [ -n "$OPTARG" ] || usage
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curve=$OPTARG
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;;
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d) days=$(tonumber "$OPTARG") || usage
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;;
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*) usage
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;;
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esac
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done
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shift $((OPTIND - 1))
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[ $# -eq 1 ] && [ -n "$1" ] || usage
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domain=$1
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if [ -f "$domain.key" ]; then
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printf "%s: key for %s already exists; reusing it.\n" \
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"${0##*/}" "$domain" >&2
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else
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(umask 077 &&
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openssl ecparam -genkey -name "$curve" -out "$domain.key")
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fi
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openssl req -new -x509 -days "$days" -subj "/CN=$domain" \
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-key "$domain.key" -out "$domain.pem"
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