mirror of
https://github.com/nginx-proxy/docker-letsencrypt-nginx-proxy-companion
synced 2024-11-23 05:02:15 +01:00
a16a97fe11
* fix: restrict private file permissions by default * fix: check perms of /etc/acme.sh private keys * fix: typo
461 lines
19 KiB
Bash
Executable File
461 lines
19 KiB
Bash
Executable File
#!/bin/bash
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# shellcheck source=functions.sh
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source /app/functions.sh
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CERTS_UPDATE_INTERVAL="${CERTS_UPDATE_INTERVAL:-3600}"
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ACME_CA_URI="${ACME_CA_URI:-"https://acme-v02.api.letsencrypt.org/directory"}"
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ACME_CA_TEST_URI="https://acme-staging-v02.api.letsencrypt.org/directory"
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DEFAULT_KEY_SIZE="${DEFAULT_KEY_SIZE:-4096}"
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RENEW_PRIVATE_KEYS="$(lc "${RENEW_PRIVATE_KEYS:-true}")"
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# Backward compatibility environment variable
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REUSE_PRIVATE_KEYS="$(lc "${REUSE_PRIVATE_KEYS:-false}")"
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function create_link {
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local -r source=${1?missing source argument}
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local -r target=${2?missing target argument}
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if [[ -f "$target" ]] && [[ "$(readlink "$target")" == "$source" ]]; then
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set_ownership_and_permissions "$target"
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[[ "$DEBUG" == 1 ]] && echo "$target already linked to $source"
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return 1
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else
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ln -sf "$source" "$target" \
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&& set_ownership_and_permissions "$target"
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fi
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}
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function create_links {
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local -r base_domain=${1?missing base_domain argument}
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local -r domain=${2?missing base_domain argument}
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if [[ ! -f "/etc/nginx/certs/$base_domain/fullchain.pem" || \
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! -f "/etc/nginx/certs/$base_domain/key.pem" ]]; then
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return 1
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fi
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local return_code=1
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create_link "./$base_domain/fullchain.pem" "/etc/nginx/certs/$domain.crt"
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return_code=$(( return_code & $? ))
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create_link "./$base_domain/key.pem" "/etc/nginx/certs/$domain.key"
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return_code=$(( return_code & $? ))
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if [[ -f "/etc/nginx/certs/dhparam.pem" ]]; then
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create_link ./dhparam.pem "/etc/nginx/certs/$domain.dhparam.pem"
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return_code=$(( return_code & $? ))
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fi
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if [[ -f "/etc/nginx/certs/$base_domain/chain.pem" ]]; then
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create_link "./$base_domain/chain.pem" "/etc/nginx/certs/$domain.chain.pem"
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return_code=$(( return_code & $? ))
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fi
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return $return_code
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}
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function cleanup_links {
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local -a LETSENCRYPT_CONTAINERS
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local -a LETSENCRYPT_STANDALONE_CERTS
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local -a ENABLED_DOMAINS
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local -a SYMLINKED_DOMAINS
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local -a DISABLED_DOMAINS
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# Create an array containing domains for which a
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# symlinked private key exists in /etc/nginx/certs.
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for symlinked_domain in /etc/nginx/certs/*.crt; do
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[[ -L "$symlinked_domain" ]] || continue
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symlinked_domain="${symlinked_domain##*/}"
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symlinked_domain="${symlinked_domain%*.crt}"
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SYMLINKED_DOMAINS+=("$symlinked_domain")
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done
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[[ "$DEBUG" == 1 ]] && echo "Symlinked domains: ${SYMLINKED_DOMAINS[*]}"
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# Create an array containing domains that are considered
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# enabled (ie present on /app/letsencrypt_service_data or /app/letsencrypt_user_data).
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[[ -f /app/letsencrypt_service_data ]] && source /app/letsencrypt_service_data
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[[ -f /app/letsencrypt_user_data ]] && source /app/letsencrypt_user_data
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LETSENCRYPT_CONTAINERS+=( "${LETSENCRYPT_STANDALONE_CERTS[@]}" )
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for cid in "${LETSENCRYPT_CONTAINERS[@]}"; do
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local -n hosts_array="LETSENCRYPT_${cid}_HOST"
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for domain in "${hosts_array[@]}"; do
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# Add domain to the array storing currently enabled domains.
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ENABLED_DOMAINS+=("$domain")
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done
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done
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[[ "$DEBUG" == 1 ]] && echo "Enabled domains: ${ENABLED_DOMAINS[*]}"
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# Create an array containing only domains for which a symlinked private key exists
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# in /etc/nginx/certs but that no longer have a corresponding LETSENCRYPT_HOST set
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# on an active container or on /app/letsencrypt_user_data
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if [[ ${#SYMLINKED_DOMAINS[@]} -gt 0 ]]; then
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mapfile -t DISABLED_DOMAINS < <(echo "${SYMLINKED_DOMAINS[@]}" \
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"${ENABLED_DOMAINS[@]}" \
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"${ENABLED_DOMAINS[@]}" \
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| tr ' ' '\n' | sort | uniq -u)
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fi
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[[ "$DEBUG" == 1 ]] && echo "Disabled domains: ${DISABLED_DOMAINS[*]}"
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# Remove disabled domains symlinks if present.
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# Return 1 if nothing was removed and 0 otherwise.
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if [[ ${#DISABLED_DOMAINS[@]} -gt 0 ]]; then
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[[ "$DEBUG" == 1 ]] && echo "Some domains are disabled :"
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for disabled_domain in "${DISABLED_DOMAINS[@]}"; do
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[[ "$DEBUG" == 1 ]] && echo "Checking domain ${disabled_domain}"
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cert_folder="$(readlink -f "/etc/nginx/certs/${disabled_domain}.crt")"
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# If the dotfile is absent, skip domain.
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if [[ ! -e "${cert_folder%/*}/.companion" ]]; then
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[[ "$DEBUG" == 1 ]] && echo "No .companion file found in ${cert_folder}. ${disabled_domain} is not managed by acme-companion. Skipping domain."
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continue
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else
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[[ "$DEBUG" == 1 ]] && echo "${disabled_domain} is managed by acme-companion. Removing unused symlinks."
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fi
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for extension in .crt .key .dhparam.pem .chain.pem; do
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file="${disabled_domain}${extension}"
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if [[ -n "${file// }" ]] && [[ -L "/etc/nginx/certs/${file}" ]]; then
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[[ "$DEBUG" == 1 ]] && echo "Removing /etc/nginx/certs/${file}"
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rm -f "/etc/nginx/certs/${file}"
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fi
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done
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done
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return 0
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else
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return 1
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fi
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}
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function update_cert {
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local cid="${1:?}"
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local -n hosts_array="LETSENCRYPT_${cid}_HOST"
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# First domain will be our base domain
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local base_domain="${hosts_array[0]}"
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local should_restart_container='false'
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# Base CLI parameters array, used for both --register-account and --issue
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local -a params_base_arr
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params_base_arr+=(--log /dev/null)
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[[ "$DEBUG" == 1 ]] && params_base_arr+=(--debug 2)
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# Alternative trusted root CA path, used for test with Pebble
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if [[ -n "${CA_BUNDLE// }" ]]; then
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if [[ -f "$CA_BUNDLE" ]]; then
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params_base_arr+=(--ca-bundle "$CA_BUNDLE")
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[[ "$DEBUG" == 1 ]] && echo "Debug: acme.sh will use $CA_BUNDLE as trusted root CA."
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else
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echo "Warning: the path to the alternate CA bundle ($CA_BUNDLE) is not valid, using default Alpine trust store."
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fi
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fi
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# CLI parameters array used for --register-account
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local -a params_register_arr
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# CLI parameters array used for --issue
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local -a params_issue_arr
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params_issue_arr+=(--webroot /usr/share/nginx/html)
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local -n cert_keysize="LETSENCRYPT_${cid}_KEYSIZE"
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if [[ -z "$cert_keysize" ]] || \
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[[ ! "$cert_keysize" =~ ^(2048|3072|4096|ec-256|ec-384)$ ]]; then
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cert_keysize=$DEFAULT_KEY_SIZE
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fi
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params_issue_arr+=(--keylength "$cert_keysize")
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# OCSP-Must-Staple extension
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local -n ocsp="ACME_${cid}_OCSP"
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if [[ $(lc "$ocsp") == true ]]; then
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params_issue_arr+=(--ocsp-must-staple)
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fi
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local -n accountemail="LETSENCRYPT_${cid}_EMAIL"
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local config_home
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# If we don't have a LETSENCRYPT_EMAIL from the proxied container
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# and DEFAULT_EMAIL is set to a non empty value, use the latter.
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if [[ -z "$accountemail" ]]; then
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if [[ -n "${DEFAULT_EMAIL// }" ]]; then
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accountemail="$DEFAULT_EMAIL"
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else
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unset accountemail
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fi
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fi
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if [[ -n "${accountemail// }" ]]; then
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# If we got an email, use it with the corresponding config home
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config_home="/etc/acme.sh/$accountemail"
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else
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# If we did not get any email at all, use the default (empty mail) config
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config_home="/etc/acme.sh/default"
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fi
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local -n acme_ca_uri="ACME_${cid}_CA_URI"
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if [[ -z "$acme_ca_uri" ]]; then
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# Use default or user provided ACME end point
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acme_ca_uri="$ACME_CA_URI"
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fi
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# LETSENCRYPT_TEST overrides LETSENCRYPT_ACME_CA_URI
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local -n test_certificate="LETSENCRYPT_${cid}_TEST"
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if [[ $(lc "$test_certificate") == true ]]; then
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# Use Let's Encrypt ACME V2 staging end point
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acme_ca_uri="$ACME_CA_TEST_URI"
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fi
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# Set relevant --server parameter and ca folder name
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params_base_arr+=(--server "$acme_ca_uri")
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local ca_dir="${acme_ca_uri##*://}" \
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&& ca_dir="${ca_dir%%/*}" \
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&& ca_dir="${ca_dir%%:*}"
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local certificate_dir
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# If we're going to use one of LE stating endpoints ...
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if [[ "$acme_ca_uri" =~ ^https://acme-staging.* ]]; then
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# Unset accountemail
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# force config dir to 'staging'
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unset accountemail
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config_home="/etc/acme.sh/staging"
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# Prefix test certificate directory with _test_
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certificate_dir="/etc/nginx/certs/_test_$base_domain"
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else
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certificate_dir="/etc/nginx/certs/$base_domain"
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fi
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params_issue_arr+=( \
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--cert-file "${certificate_dir}/cert.pem" \
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--key-file "${certificate_dir}/key.pem" \
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--ca-file "${certificate_dir}/chain.pem" \
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--fullchain-file "${certificate_dir}/fullchain.pem" \
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)
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[[ ! -d "$config_home" ]] && mkdir -p "$config_home"
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params_base_arr+=(--config-home "$config_home")
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local account_file="${config_home}/ca/${ca_dir}/account.json"
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# External Account Binding (EAB)
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local -n eab_kid="ACME_${cid}_EAB_KID"
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local -n eab_hmac_key="ACME_${cid}_EAB_HMAC_KEY"
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if [[ ! -f "$account_file" ]]; then
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if [[ -n "${eab_kid}" && -n "${eab_hmac_key}" ]]; then
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# Register the ACME account with the per container EAB credentials.
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params_register_arr+=(--eab-kid "$eab_kid" --eab-hmac-key "$eab_hmac_key")
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elif [[ -n "${ACME_EAB_KID// }" && -n "${ACME_EAB_HMAC_KEY// }" ]]; then
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# We don't have per-container EAB kid and hmac key or Zero SSL API key.
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# Register the ACME account with the default EAB credentials.
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params_register_arr+=(--eab-kid "$ACME_EAB_KID" --eab-hmac-key "$ACME_EAB_HMAC_KEY")
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elif [[ -n "${accountemail// }" ]]; then
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# We don't have per container nor default EAB credentials, register a new account.
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params_register_arr+=(--accountemail "$accountemail")
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fi
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fi
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# Zero SSL
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if [[ "$acme_ca_uri" == "https://acme.zerossl.com/v2/DV90" ]]; then
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# Test if we already have:
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# - an account file
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# - the --accountemail account registration parameter
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# - the --eab-kid and --eab-hmac-key account registration parameters
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local account_ok='false'
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if [[ -f "$account_file" ]]; then
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account_ok='true'
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elif in_array '--accountemail' 'params_register_arr'; then
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account_ok='true'
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elif in_array '--eab-kid' 'params_register_arr' && in_array '--eab-hmac-key' 'params_register_arr'; then
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account_ok='true'
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fi
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if [[ $account_ok == 'false' ]]; then
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local -n zerossl_api_key="ZEROSSL_${cid}_API_KEY"
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if [[ -z "$zerossl_api_key" ]]; then
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# Try using the default API key
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zerossl_api_key="${ZEROSSL_API_KEY:-}"
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fi
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if [[ -n "${zerossl_api_key// }" ]]; then
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# Generate a set of ACME EAB credentials using the ZeroSSL API.
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local zerossl_api_response
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if zerossl_api_response="$(curl -s -X POST "https://api.zerossl.com/acme/eab-credentials?access_key=${zerossl_api_key}")"; then
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if [[ "$(jq -r .success <<< "$zerossl_api_response")" == 'true' ]]; then
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eab_kid="$(jq -r .eab_kid <<< "$zerossl_api_response")"
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eab_hmac_key="$(jq -r .eab_hmac_key <<< "$zerossl_api_response")"
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params_register_arr+=(--eab-kid "$eab_kid" --eab-hmac-key "$eab_hmac_key")
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[[ "$DEBUG" == 1 ]] && echo "Successfull EAB credentials request against the ZeroSSL API, got the following EAB kid : ${eab_kid}"
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else
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# The JSON response body indicated an unsuccesfull API call.
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echo "Warning: the EAB credentials request against the ZeroSSL API was not successfull."
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fi
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else
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# curl failed.
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echo "Warning: curl failed to make an HTTP POST request to https://api.zerossl.com/acme/eab-credentials."
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fi
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else
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# We don't have a Zero SSL ACME account, EAB credentials, a ZeroSSL API key or an account email :
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# skip certificate account registration and certificate issuance.
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echo "Error: usage of ZeroSSL require an email bound account. No EAB credentials, ZeroSSL API key or email were provided for this certificate, creation aborted."
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return 1
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fi
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fi
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fi
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# Account registration and update if required
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if [[ ! -f "$account_file" ]]; then
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params_register_arr=("${params_base_arr[@]}" "${params_register_arr[@]}")
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[[ "$DEBUG" == 1 ]] && echo "Calling acme.sh --register-account with the following parameters : ${params_register_arr[*]}"
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acme.sh --register-account "${params_register_arr[@]}"
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fi
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if [[ -n "${accountemail// }" ]] && ! grep -q "mailto:$accountemail" "$account_file"; then
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local -a params_update_arr=("${params_base_arr[@]}" --accountemail "$accountemail")
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[[ "$DEBUG" == 1 ]] && echo "Calling acme.sh --update-account with the following parameters : ${params_update_arr[*]}"
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acme.sh --update-account "${params_update_arr[@]}"
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fi
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# If we still don't have an account.json file by this point, we've got an issue
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if [[ ! -f "$account_file" ]]; then
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echo "Error: no ACME account was found or registered for $accountemail and $acme_ca_uri, certificate creation aborted."
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return 1
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fi
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# acme.sh pre and post hooks
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local -n acme_pre_hook="ACME_${cid}_PRE_HOOK"
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if [[ -n "${acme_pre_hook}" ]]; then
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# Use per-container pre hook
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params_issue_arr+=(--pre-hook "$acme_pre_hook")
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elif [[ -n ${ACME_PRE_HOOK// } ]]; then
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# Use default pre hook
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params_issue_arr+=(--pre-hook "$ACME_PRE_HOOK")
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fi
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local -n acme_post_hook="ACME_${cid}_POST_HOOK"
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if [[ -n "${acme_post_hook}" ]]; then
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# Use per-container post hook
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params_issue_arr+=(--post-hook "$acme_post_hook")
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elif [[ -n ${ACME_POST_HOOK// } ]]; then
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# Use default post hook
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params_issue_arr+=(--post-hook "$ACME_POST_HOOK")
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fi
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local -n acme_preferred_chain="ACME_${cid}_PREFERRED_CHAIN"
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if [[ -n "${acme_preferred_chain}" ]]; then
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# Using amce.sh --preferred-chain to select alternate chain.
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params_issue_arr+=(--preferred-chain "$acme_preferred_chain")
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fi
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if [[ "$RENEW_PRIVATE_KEYS" != 'false' && "$REUSE_PRIVATE_KEYS" != 'true' ]]; then
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params_issue_arr+=(--always-force-new-domain-key)
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fi
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[[ "${2:-}" == "--force-renew" ]] && params_issue_arr+=(--force)
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# Create directory for the first domain
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mkdir -p "$certificate_dir"
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set_ownership_and_permissions "$certificate_dir"
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for domain in "${hosts_array[@]}"; do
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# Add all the domains to certificate
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params_issue_arr+=(--domain "$domain")
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# Add location configuration for the domain
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add_location_configuration "$domain" || reload_nginx
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done
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params_issue_arr=("${params_base_arr[@]}" "${params_issue_arr[@]}")
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[[ "$DEBUG" == 1 ]] && echo "Calling acme.sh --issue with the following parameters : ${params_issue_arr[*]}"
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echo "Creating/renewal $base_domain certificates... (${hosts_array[*]})"
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acme.sh --issue "${params_issue_arr[@]}"
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local acmesh_return=$?
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# 0 = success, 2 = RENEW_SKIP
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if [[ $acmesh_return == 0 || $acmesh_return == 2 ]]; then
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for domain in "${hosts_array[@]}"; do
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if [[ $acme_ca_uri =~ ^https://acme-staging.* ]]; then
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create_links "_test_$base_domain" "$domain" \
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&& should_reload_nginx='true' \
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&& should_restart_container='true'
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else
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create_links "$base_domain" "$domain" \
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&& should_reload_nginx='true' \
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&& should_restart_container='true'
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fi
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done
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echo "${COMPANION_VERSION:-}" > "${certificate_dir}/.companion"
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set_ownership_and_permissions "${certificate_dir}/.companion"
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# Make private key root readable only
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for file in cert.pem key.pem chain.pem fullchain.pem; do
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local file_path="${certificate_dir}/${file}"
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[[ -e "$file_path" ]] && set_ownership_and_permissions "$file_path"
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done
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local acme_private_key="$(find /etc/acme.sh -name "*.key" -path "*${hosts_array[0]}*")"
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[[ -e "$acme_private_key" ]] && set_ownership_and_permissions "$acme_private_key"
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# Queue nginx reload if a certificate was issued or renewed
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[[ $acmesh_return -eq 0 ]] \
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&& should_reload_nginx='true' \
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&& should_restart_container='true'
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fi
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# Restart container if certs are updated and the respective environmental variable is set
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local -n restart_container="LETSENCRYPT_${cid}_RESTART_CONTAINER"
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if [[ $(lc "$restart_container") == true ]] && [[ "$should_restart_container" == 'true' ]]; then
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echo "Restarting container (${cid})..."
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docker_restart "${cid}"
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fi
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for domain in "${hosts_array[@]}"; do
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if [[ -f "/etc/nginx/conf.d/standalone-cert-$domain.conf" ]]; then
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[[ "$DEBUG" == 1 ]] && echo "Debug: removing standalone configuration file /etc/nginx/conf.d/standalone-cert-$domain.conf"
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rm -f "/etc/nginx/conf.d/standalone-cert-$domain.conf" && should_reload_nginx='true'
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fi
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done
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}
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function update_certs {
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local -a LETSENCRYPT_CONTAINERS
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local -a LETSENCRYPT_STANDALONE_CERTS
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pushd /etc/nginx/certs > /dev/null || return
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check_nginx_proxy_container_run || return
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# Load relevant container settings
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if [[ -f /app/letsencrypt_service_data ]]; then
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source /app/letsencrypt_service_data
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else
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echo "Warning: /app/letsencrypt_service_data not found, skipping data from containers."
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fi
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# Load settings for standalone certs
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if [[ -f /app/letsencrypt_user_data ]]; then
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if source /app/letsencrypt_user_data; then
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for cid in "${LETSENCRYPT_STANDALONE_CERTS[@]}"; do
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local -n hosts_array="LETSENCRYPT_${cid}_HOST"
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for domain in "${hosts_array[@]}"; do
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add_standalone_configuration "$domain"
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done
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done
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reload_nginx
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LETSENCRYPT_CONTAINERS+=( "${LETSENCRYPT_STANDALONE_CERTS[@]}" )
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else
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echo "Warning: could not source /app/letsencrypt_user_data, skipping user data"
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fi
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fi
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should_reload_nginx='false'
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for cid in "${LETSENCRYPT_CONTAINERS[@]}"; do
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# Pass the eventual --force-renew arg to update_cert() as second arg
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update_cert "$cid" "${1:-}"
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done
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cleanup_links && should_reload_nginx='true'
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[[ "$should_reload_nginx" == 'true' ]] && reload_nginx
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popd > /dev/null || return
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}
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# Allow the script functions to be sourced without starting the Service Loop.
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if [ "${1}" == "--source-only" ]; then
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return 0
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fi
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pid=
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# Service Loop: When this script exits, start it again.
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trap '[[ $pid ]] && kill $pid; exec $0' EXIT
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trap 'trap - EXIT' INT TERM
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update_certs "$@"
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# Wait some amount of time
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echo "Sleep for ${CERTS_UPDATE_INTERVAL}s"
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sleep $CERTS_UPDATE_INTERVAL & pid=$!
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wait
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pid=
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