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acme.sh/dnsapi/dns_oci.sh
Avi Miller 1d089d4541
fix: refactor the way the config is read from file and envvars 
The plugin will use the following order of precedence:

environment value > file value > default value

See the wiki for details on environment variable names.

Signed-off-by: Avi Miller <avi.miller@oracle.com>
2021-06-20 17:00:53 +10:00

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#!/usr/bin/env sh
#
# Acme.sh DNS API plugin for Oracle Cloud Infrastructure
# Copyright (c) 2021, Oracle and/or its affiliates
#
# The plugin will automatically use the default profile from an OCI SDK and CLI
# configuration file, if it exists.
#
# Alternatively, set the following environment variables:
# - OCI_CLI_TENANCY : OCID of tenancy that contains the target DNS zone
# - OCI_CLI_USER : OCID of user with permission to add/remove records from zones
# - OCI_CLI_REGION : Should point to the tenancy home region
#
# One of the following two variables is required:
# - OCI_CLI_KEY_FILE: Path to private API signing key file in PEM format; or
# - OCI_CLI_KEY : The private API signing key in PEM format
#
# NOTE: using an encrypted private key that needs a passphrase is not supported.
#
dns_oci_add() {
_fqdn="$1"
_rdata="$2"
if _get_oci_zone; then
_add_record_body="{\"items\":[{\"domain\":\"${_sub_domain}.${_domain}\",\"rdata\":\"$_rdata\",\"rtype\":\"TXT\",\"ttl\": 30,\"operation\":\"ADD\"}]}"
response=$(_signed_request "PATCH" "/20180115/zones/${_domain}/records" "$_add_record_body")
if [ "$response" ]; then
_info "Success: added TXT record for ${_sub_domain}.${_domain}."
else
_err "Error: failed to add TXT record for ${_sub_domain}.${_domain}."
_err "Check that the user has permission to add records to this zone."
return 1
fi
else
return 1
fi
}
dns_oci_rm() {
_fqdn="$1"
_rdata="$2"
if _get_oci_zone; then
_remove_record_body="{\"items\":[{\"domain\":\"${_sub_domain}.${_domain}\",\"rdata\":\"$_rdata\",\"rtype\":\"TXT\",\"operation\":\"REMOVE\"}]}"
response=$(_signed_request "PATCH" "/20180115/zones/${_domain}/records" "$_remove_record_body")
if [ "$response" ]; then
_info "Success: removed TXT record for ${_sub_domain}.${_domain}."
else
_err "Error: failed to remove TXT record for ${_sub_domain}.${_domain}."
_err "Check that the user has permission to remove records from this zone."
return 1
fi
else
return 1
fi
}
#################### Private functions below ##################################
_get_oci_zone() {
if ! _oci_config; then
return 1
fi
if ! _get_zone "$_fqdn"; then
_err "Error: DNS Zone not found for $_fqdn in $OCI_CLI_TENANCY"
return 1
fi
return 0
}
_oci_config() {
_DEFAULT_OCI_CLI_CONFIG_FILE="$HOME/.oci/config"
OCI_CLI_CONFIG_FILE="${OCI_CLI_CONFIG_FILE:-$(_readaccountconf_mutable OCI_CLI_CONFIG_FILE)}"
if [ -z "$OCI_CLI_CONFIG_FILE" ]; then
OCI_CLI_CONFIG_FILE="$_DEFAULT_OCI_CLI_CONFIG_FILE"
fi
if [ "$_DEFAULT_OCI_CLI_CONFIG_FILE" != "$OCI_CLI_CONFIG_FILE" ]; then
_saveaccountconf_mutable OCI_CLI_CONFIG_FILE "$OCI_CLI_CONFIG_FILE"
else
_clearaccountconf_mutable OCI_CLI_CONFIG_FILE
fi
_DEFAULT_OCI_CLI_PROFILE="DEFAULT"
OCI_CLI_PROFILE="${OCI_CLI_PROFILE:-$(_readaccountconf_mutable OCI_CLI_PROFILE)}"
if [ "$_DEFAULT_OCI_CLI_PROFILE" != "$OCI_CLI_PROFILE" ]; then
_saveaccountconf_mutable OCI_CLI_PROFILE "$OCI_CLI_PROFILE"
else
OCI_CLI_PROFILE="$_DEFAULT_OCI_CLI_PROFILE"
_clearaccountconf_mutable OCI_CLI_PROFILE
fi
OCI_CLI_TENANCY="${OCI_CLI_TENANCY:-$(_readaccountconf_mutable OCI_CLI_TENANCY)}"
if [ "$OCI_CLI_TENANCY" ]; then
_saveaccountconf_mutable OCI_CLI_TENANCY "$OCI_CLI_TENANCY"
elif [ -f "$OCI_CLI_CONFIG_FILE" ]; then
_debug "Reading OCI_CLI_TENANCY value from: $OCI_CLI_CONFIG_FILE"
OCI_CLI_TENANCY="${OCI_CLI_TENANCY:-$(_readini "$OCI_CLI_CONFIG_FILE" tenancy "$OCI_CLI_PROFILE")}"
fi
if [ -z "$OCI_CLI_TENANCY" ]; then
_err "Error: unable to read OCI_CLI_TENANCY from config file or environment variable."
return 1
fi
OCI_CLI_USER="${OCI_CLI_USER:-$(_readaccountconf_mutable OCI_CLI_USER)}"
if [ "$OCI_CLI_USER" ]; then
_saveaccountconf_mutable OCI_CLI_USER "$OCI_CLI_USER"
elif [ -f "$OCI_CLI_CONFIG_FILE" ]; then
_debug "Reading OCI_CLI_USER value from: $OCI_CLI_CONFIG_FILE"
OCI_CLI_USER="${OCI_CLI_USER:-$(_readini "$OCI_CLI_CONFIG_FILE" user "$OCI_CLI_PROFILE")}"
fi
if [ -z "$OCI_CLI_USER" ]; then
_err "Error: unable to read OCI_CLI_USER from config file or environment variable."
return 1
fi
OCI_CLI_REGION="${OCI_CLI_REGION:-$(_readaccountconf_mutable OCI_CLI_REGION)}"
if [ "$OCI_CLI_REGION" ]; then
_saveaccountconf_mutable OCI_CLI_REGION "$OCI_CLI_REGION"
elif [ -f "$OCI_CLI_CONFIG_FILE" ]; then
_debug "Reading OCI_CLI_REGION value from: $OCI_CLI_CONFIG_FILE"
OCI_CLI_REGION="${OCI_CLI_REGION:-$(_readini "$OCI_CLI_CONFIG_FILE" region "$OCI_CLI_PROFILE")}"
fi
if [ -z "$OCI_CLI_REGION" ]; then
_err "Error: unable to read OCI_CLI_REGION from config file or environment variable."
return 1
fi
OCI_CLI_KEY="${OCI_CLI_KEY:-$(_readaccountconf_mutable OCI_CLI_KEY)}"
if [ -z "$OCI_CLI_KEY" ]; then
_clearaccountconf_mutable OCI_CLI_KEY
OCI_CLI_KEY_FILE="${OCI_CLI_KEY_FILE:-$(_readini "$OCI_CLI_CONFIG_FILE" key_file "$OCI_CLI_PROFILE")}"
if [ "$OCI_CLI_KEY_FILE" ] && [ -f "$OCI_CLI_KEY_FILE" ]; then
_debug "Reading OCI_CLI_KEY value from: $OCI_CLI_KEY_FILE"
OCI_CLI_KEY=$(_base64 <"$OCI_CLI_KEY_FILE")
_saveaccountconf_mutable OCI_CLI_KEY "$OCI_CLI_KEY"
fi
else
_saveaccountconf_mutable OCI_CLI_KEY "$OCI_CLI_KEY"
fi
if [ -z "$OCI_CLI_KEY_FILE" ] && [ -z "$OCI_CLI_KEY" ]; then
_err "Error: unable to find key file path in OCI config file or OCI_CLI_KEY_FILE."
_err "Error: unable to load private API signing key from OCI_CLI_KEY."
return 1
fi
if [ "$(printf "%s\n" "$OCI_CLI_KEY" | wc -l)" -eq 1 ]; then
OCI_CLI_KEY=$(printf "%s" "$OCI_CLI_KEY" | _dbase64 multiline)
fi
return 0
}
# _get_zone(): retrieves the Zone name and OCID
#
# _sub_domain=_acme-challenge.www
# _domain=domain.com
# _domain_ociid=ocid1.dns-zone.oc1..
_get_zone() {
domain=$1
i=1
p=1
while true; do
h=$(printf "%s" "$domain" | cut -d . -f $i-100)
_debug h "$h"
if [ -z "$h" ]; then
# not valid
return 1
fi
_domain_id=$(_signed_request "GET" "/20180115/zones/$h" "" "id")
if [ "$_domain_id" ]; then
_sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
_domain=$h
_debug _domain_id "$_domain_id"
_debug _sub_domain "$_sub_domain"
_debug _domain "$_domain"
return 0
fi
p=$i
i=$(_math "$i" + 1)
done
return 1
}
#Usage: privatekey
#Output MD5 fingerprint
_fingerprint() {
pkey="$1"
if [ -z "$pkey" ]; then
_usage "Usage: _fingerprint privkey"
return 1
fi
printf "%s" "$pkey" | ${ACME_OPENSSL_BIN:-openssl} rsa -pubout -outform DER 2>/dev/null | ${ACME_OPENSSL_BIN:-openssl} md5 -c | cut -d = -f 2 | tr -d ' '
}
_signed_request() {
_sig_method="$1"
_sig_target="$2"
_sig_body="$3"
_return_field="$4"
_key_fingerprint=$(_fingerprint "$OCI_CLI_KEY")
_sig_host="dns.$OCI_CLI_REGION.oraclecloud.com"
_sig_keyId="$OCI_CLI_TENANCY/$OCI_CLI_USER/$_key_fingerprint"
_sig_alg="rsa-sha256"
_sig_version="1"
_sig_now="$(LC_ALL=C \date -u "+%a, %d %h %Y %H:%M:%S GMT")"
_request_method=$(printf %s "$_sig_method" | _lower_case)
_curl_method=$(printf %s "$_sig_method" | _upper_case)
_request_target="(request-target): $_request_method $_sig_target"
_date_header="date: $_sig_now"
_host_header="host: $_sig_host"
_string_to_sign="$_request_target\n$_date_header\n$_host_header"
_sig_headers="(request-target) date host"
if [ "$_sig_body" ]; then
_secure_debug3 _sig_body "$_sig_body"
_sig_body_sha256="x-content-sha256: $(printf %s "$_sig_body" | _digest sha256)"
_sig_body_type="content-type: application/json"
_sig_body_length="content-length: ${#_sig_body}"
_string_to_sign="$_string_to_sign\n$_sig_body_sha256\n$_sig_body_type\n$_sig_body_length"
_sig_headers="$_sig_headers x-content-sha256 content-type content-length"
fi
_tmp_file=$(_mktemp)
if [ -f "$_tmp_file" ]; then
printf '%s' "$OCI_CLI_KEY" >"$_tmp_file"
_signature=$(printf '%b' "$_string_to_sign" | _sign "$_tmp_file" sha256 | tr -d '\r\n')
rm -f "$_tmp_file"
fi
_signed_header="Authorization: Signature version=\"$_sig_version\",keyId=\"$_sig_keyId\",algorithm=\"$_sig_alg\",headers=\"$_sig_headers\",signature=\"$_signature\""
_secure_debug3 _signed_header "$_signed_header"
if [ "$_curl_method" = "GET" ]; then
export _H1="$_date_header"
export _H2="$_signed_header"
_response="$(_get "https://${_sig_host}${_sig_target}")"
elif [ "$_curl_method" = "PATCH" ]; then
export _H1="$_date_header"
export _H2="$_sig_body_sha256"
export _H3="$_sig_body_type"
export _H4="$_sig_body_length"
export _H5="$_signed_header"
_response="$(_post "$_sig_body" "https://${_sig_host}${_sig_target}" "" "PATCH")"
else
_err "Unable to process method: $_curl_method."
fi
_ret="$?"
if [ "$_return_field" ]; then
_response="$(echo "$_response" | sed 's/\\\"//g'))"
_return=$(echo "${_response}" | _egrep_o "\"$_return_field\"\\s*:\\s*\"[^\"]*\"" | _head_n 1 | cut -d : -f 2 | tr -d "\"")
else
_return="$_response"
fi
printf "%s" "$_return"
return $_ret
}
# file key [section]
_readini() {
_file="$1"
_key="$2"
_section="${3:-DEFAULT}"
_start_n=$(grep -n '\['"$_section"']' "$_file" | cut -d : -f 1)
_debug3 _start_n "$_start_n"
if [ -z "$_start_n" ]; then
_err "Can not find section: $_section"
return 1
fi
_start_nn=$(_math "$_start_n" + 1)
_debug3 "_start_nn" "$_start_nn"
_left="$(sed -n "${_start_nn},99999p" "$_file")"
_debug3 _left "$_left"
_end="$(echo "$_left" | grep -n "^\[" | _head_n 1)"
_debug3 "_end" "$_end"
if [ "$_end" ]; then
_end_n=$(echo "$_end" | cut -d : -f 1)
_debug3 "_end_n" "$_end_n"
_seg_n=$(echo "$_left" | sed -n "1,${_end_n}p")
else
_seg_n="$_left"
fi
_debug3 "_seg_n" "$_seg_n"
_lineini="$(echo "$_seg_n" | grep "^ *$_key *= *")"
_inivalue="$(printf "%b" "$(eval "echo $_lineini | sed \"s/^ *${_key} *= *//g\"")")"
_debug2 _inivalue "$_inivalue"
echo "$_inivalue"
}
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