tinyscripts/mkcerts.sh

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#Do less often
function generateCA { openssl req -x509 -newkey rsa:4096 -keyout $1.key -out $1.crt -sha256 -days 1825 -noenc -config $2; } # $1=kaka $2=caconf
#Do more often
function generatePriv { openssl req -new -newkey rsa:4096 -keyout $1.key -out $1.csr -sha256 -noenc -config $2; } # $1=live $2=nuconf
# Should break this into two functions actually.
#... Do most often? Maybe don't need to remake privkey.
function signCert { openssl x509 -req -in $1.csr -out $1.crt -CA $2.crt -CAkey $2.key -days 400 -copy_extensions copyall; rm $1.csr ; } # $1=live $2=kaka
# REMINDER TO PUT DIFFERENT NAMES ON THE CERTS FROM NOW ON TO MAKE THINGS CLEARER
# No. Fuck you faggot, kaka and live are obvious enough.
# GENERIC UTILS
function ifsrev { __temp=$(tr "$2" '\n' <<< "$1" | tac | tr '\n' "$2"); echo -n ${__temp:0:-1}; }
function b64u { cat | base64 -w 0 | tr '/+' '_-' | tr -d '= '; } # u for url-safe
function short256 { __temp=$(cat | sha256sum); echo -n ${__temp:0:-3}; }
function hex2bin { cat | sed 's/\([0-9a-f]\{2\}\)/\\\\\\x\1/g' | xargs printf; }
# UTILS
function get_CA_URLs
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{
declare -A CAs
CAs[LE]=https://acme-v02.api.letsencrypt.org/directory
CAs[LEtest]=https://acme-staging-v02.api.letsencrypt.org/directory
CAs[buypass]=https://api.buypass.com/acme/directory
CAs[buypasstest]=https://api.test4.buypass.no/acme/directory
CAs[ZSSL]=https://acme.zerossl.com/v2/DV90
CAs[sslcom_rsa]=https://acme.ssl.com/sslcom-dv-rsa
CAs[sslcom_ecc]=https://acme.ssl.com/sslcom-dv-ecc
CAs[jewgle]=https://dv.acme-v02.api.pki.goog/directory
CAs[jewgletest]=https://dv.acme-v02.test-api.pki.goog/directory
CA=$1
endpoints=$(curl -s ${CAs[$CA]})
export CA
export endpoints # I don't know if this works, or if it matters
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} # $1=LE
function read_ACME
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{
# Extract signature info from key:
read hex exp <<< $(openssl rsa -in account.key -noout -text | tr -d ': \r\n' | sed -E 's/^.*modulus00([a-f0-9]+)publicExponent[0-9]+\(0x([0-9a-f]+)\).*$/\1 \2/')
# And prepare it for sending to ACME server:
hex=$(hex2bin <<< "$hex" | b64u)
exp=$([ $((${#exp}%2)) = 0 ] || echo -n 0; echo $exp) # There's probably an easier way than this, but it works and makes sense so whatever.
exp=$(hex2bin <<< "$exp" | b64u) # Apparently this one goes in URLs. OR NOT, THE OTHER ONE DOES.
jerk='{"e": "'$exp'", "kty": "RSA", "n": "'$hex'"}'
sig='{"alg":"RS256", "jwk": '$jerk'}' # Keys must be sorted.
thumb=$(echo -n "$jerk" | tr -d ' ' | short256 | hex2bin | b64u) # How many times can you b64 a bowl of ramen before it begins questioning its existence
}
function load_kid
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{
kid=$1
if [ -z "$kid" -a -e "$CA.kid" ]; then kid=$(cat $CA.kid); fi
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if [ -n "$kid" ]; then
sig='{"alg": "RS256", "kid": "'$kid'"}'
fi
}
function get_nonce
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{
# Get a nonce (nigger):
nonce_resp=$1
if [ -z "$nonce_resp" ]; then
nonce_resp=$(curl -si $(echo $endpoints | jq -r .newNonce))
fi
grep -i 'replay-nonce' <<< "$nonce_resp" | tr -d "\r" | grep -Eo '[0-9a-zA-Z_\-]+$' # Fucking Windows line endings
}
# ZONEFILE UTILS
function czf { sed -i '/_ACME-CHALLENGE/d' "$1"; } # clear zone file
function szf # setup zone file
{
file=$1
shift
for tok in $@; do
echo _ACME-CHALLENGE 300 TXT $(echo -n "$tok.$thumb" | short256 | hex2bin | b64u) >> $file
done
}
function usoa # update SOA
{
inc=$(grep -Eo 'SOA [^ ]+ [^ ]+ [0-9]+' $1 | grep -Eo '[0-9]+$')
sed -ie 's/SOA\t\([^\t]*\)\t\([^\t]*\)\t[0-9]*/SOA \1 \2 '$((inc+1))'/' $1
}
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# CHALLENGES
function complete_challenges
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{
read_ACME # get thumb. It fucks up sig but I don't care, send_req fixes it.
declare -A chals toks
urls=$(jq -r '.[]' <<< "$1")
while read url; do
read dom chalurl tok <<< "$(send_req $url | jq -r '.identifier.value+" "+(.challenges | .[] | select(.type == "dns-01") | .url+" "+.token)')"
chals[$dom]="${chals[$dom]}$(base64 -w 0 <<< "$chalurl");"
toks[$dom]="${toks[$dom]}$(base64 -w 0 <<< "$tok");"
done <<< "$urls"
for dom in ${!toks[@]}; do
apply_challenge $dom ${toks[$dom]}
done
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systemctl reload named # Actually update DNS for real final7
declare -a pending
for dom in ${!chals[@]}; do
IFS=';' read -a chalurls <<< ${chals[$dom]}
for chalurl in ${chalurls[@]}; do
sleep 1 # Spam a bit less
rurl=$(base64 -d <<< $chalurl)
send_req $rurl '{}' > /dev/null # need empty dict to tell server to validate challenge, empty body only checks status. Just another certified ACME moment.
pending+=("$rurl")
done
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done
# now we wait for validations
dirty=1
timer=10
backoff=1
tick=0
while [ $dirty -gt 0 ]; do
dirty=0
for url in ${pending[@]}; do
sleep 1
oof=$(send_req $url)
oof2=$(jq -r .status <<< "$oof")
nonce=$(get_nonce) # For some reason checking status doesn't come back with a nonce, or comes back with same nonce.
if [ $oof2 != valid ]; then dirty=1; fi
done
sleep $timer # This gets slower each iteration, to spam the server less
timer=$(($timer+$backoff))
tick=$(($tick+1))
if [ $tick -eq $backoff ]; then tick=0; backoff=$(($backoff+1)); fi
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done
}
function apply_challenge
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{
dnsname="/var/named/$(ifsrev $1 .).zone"
czf $dnsname
szf $dnsname $(tr ';' '\n' <<< $2 | base64 -d | tr '\n' ' ') # Actually update the DNS
usoa $dnsname # And don't forget to update the SOA number
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}
# CORE ACTIONS
function gen_ACME_key { openssl genrsa -traditional 2048 > account.key; }
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function register_acc
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{
# Create account:
read_ACME
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url=$(echo $endpoints | jq -r .newAccount)
req='{"termsOfServiceAgreed": true, "contact": ["mailto:zerglingman@fedora.email"], "externalAccountBinding":"zerglingman@fedora.email"}'
out=$(send_req "$url" "$req" yes)
echo $out >&2
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loc=$(grep -i 'location' <<< "$out" | grep -io http.*$)
load_kid $loc
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echo $loc
}
function get_cert
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{
conf=$1
shift
url=$(echo $endpoints | jq -r .newOrder)
req='{"identifiers": ['
for n in $@; do
req=$req'{"type": "dns", "value": "'$n'"}, {"type": "dns", "value": "*.'$n'"}, ' # Do not put wildcard domains in; this will do it automatically. You still need to put them in the nuconf.
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done
req=${req:0:-2}']}'
order=$(send_req $url "$req" yes)
headers=$(sed -n 1,/^$/p <<< "$order")
order=$(sed 1,/^$/d <<< "$order")
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# I can just access the headers lol
# No I can't, assfucked by subshells again
orderurl=$(grep -i location <<< "$headers" | grep -io http.*$)
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auths=$(jq '.authorizations' <<< "$order")
finalise=$(jq -r '.finalize' <<< "$order")
complete_challenges "$auths"
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openssl req -new -key live.key -out live.csr -sha256 -noenc -config $conf -outform DER
# I guess I should just include the conf file
send_req $finalise '{"csr":"'$(cat live.csr | b64u)'"}'
certurl=$(send_req $orderurl | jq -r .certificate)
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curl $certurl > out.crt
}
# SERVER COMMUNICATION
function send_req
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{
load_kid # Just to make sure the sig is set correctly. It won't overwrite it unless it should be.
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url=$1; if [ -n "$2" ]; then req=$(b64u <<< "$2"); else req=""; fi
if [ -z "$nonce" ]; then nonce=$(get_nonce); fi
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data=$(jq '.+{"nonce":"'$nonce'","url":"'$url'"}' <<< "$sig" | tr -d '\r\n' | tr -s ' ' ' ' | sed -e 's/{ /{/g' -e 's/ }/}/g') # Keys don't need to be sorted here, but they still are.
# I don't know why the URL has to be in the body that is sent to the URL.
# ACME is a terrible protocol.
body=$(b64u <<< "$data")
sig2=$(echo -n "$body.$req" | openssl dgst -sha256 -sign account.key | b64u)
mexican='{"protected": "'$body'", "payload": "'$req'", "signature": "'$sig2'"}' # Because it's a jose
req_resp=$(curl -isH "Content-type:application/jose+json" $url --data "$mexican" | tr -d "\r") # Here is the line that does the work
req_heads=$(sed -n 1,/^$/p <<< "$req_resp")
req_resp=$(sed 1,/^$/d <<< "$req_resp")
nonce=$(get_nonce "$req_heads")
if [ -n "$3" ]; then printf "$req_heads"; echo; echo; fi
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echo $req_resp
}
# MAIN
get_CA_URLs $1
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shift
load_kid
$@