add ACME ca via ca.r

This commit is contained in:
lassulus 2021-12-09 11:21:06 +01:00
parent b981c43a97
commit e5fc654f50
6 changed files with 179 additions and 0 deletions

65
krebs/2configs/acme.nix Normal file
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@ -0,0 +1,65 @@
# generate intermediate certificate with generate-krebs-intermediate-ca
{ config, lib, pkgs, ... }: let
domain = "ca.r";
in {
security.acme = {
acceptTerms = true; # kinda pointless since we never use upstream
email = "spam@krebsco.de";
certs.${domain}.server = "https://${domain}:1443/acme/acme/directory"; # use 1443 here cause bootstrapping loop
};
services.nginx = {
enable = true;
recommendedProxySettings = true;
virtualHosts.${domain} = {
forceSSL = true;
enableACME = true;
locations."/" = {
proxyPass = "https://localhost:1443";
};
};
};
krebs.secret.files.krebsAcme = {
path = "/var/lib/step-ca/intermediate_ca.key";
owner.name = "root";
mode = "1444";
source-path = builtins.toString <secrets> + "/acme_ca.key";
};
services.step-ca = {
enable = true;
intermediatePasswordFile = "/dev/null";
address = "0.0.0.0";
port = 1443;
settings = {
root = pkgs.writeText "root.crt" config.krebs.ssl.rootCA;
crt = pkgs.writeText "intermediate.crt" config.krebs.ssl.intermediateCA;
key = "/var/lib/step-ca/intermediate_ca.key";
dnsNames = [ domain ];
logger.format = "text";
db = {
type = "badger";
dataSource = "/var/lib/step-ca/db";
};
authority = {
provisioners = [{
type = "ACME";
name = "acme";
forceCN = true;
}];
claims = {
maxTLSCertDuration = "2160h";
defaultTLSCertDuration = "2160h";
};
backdate = "1m0s";
};
tls = {
cipherSuites = [
"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256"
"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"
];
minVersion = 1.2;
maxVersion = 1.3;
renegotiation = false;
};
};
};
}

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@ -16,6 +16,9 @@ with import <stockholm/lib>;
krebs.enable = true; krebs.enable = true;
krebs.tinc.retiolum.enable = mkDefault true; krebs.tinc.retiolum.enable = mkDefault true;
# trust krebs ACME CA
krebs.ssl.trustIntermediate = true;
krebs.build.user = mkDefault config.krebs.users.krebs; krebs.build.user = mkDefault config.krebs.users.krebs;
networking.hostName = config.krebs.build.host.name; networking.hostName = config.krebs.build.host.name;

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@ -48,6 +48,7 @@ let
./secret.nix ./secret.nix
./setuid.nix ./setuid.nix
./shadow.nix ./shadow.nix
./ssl.nix
./sync-containers.nix ./sync-containers.nix
./tinc.nix ./tinc.nix
./tinc_graphs.nix ./tinc_graphs.nix

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@ -76,6 +76,7 @@ in {
"agenda.r" "agenda.r"
"build.r" "build.r"
"build.hotdog.r" "build.hotdog.r"
"ca.r"
"cgit.hotdog.r" "cgit.hotdog.r"
"irc.r" "irc.r"
"wiki.r" "wiki.r"

80
krebs/3modules/ssl.nix Normal file
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@ -0,0 +1,80 @@
{ config, lib, pkgs, ... }: let
cfg = config.krebs.ssl;
in {
options.krebs.ssl = {
rootCA = lib.mkOption {
type = lib.types.str;
readOnly = true;
default = ''
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
'';
};
intermediateCA = lib.mkOption {
type = lib.types.str;
readOnly = true;
default = ''
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
'';
};
acmeURL = lib.mkOption {
type = lib.types.str;
readOnly = true;
default = "https://ca.r/acme/acme/directory";
};
trustRoot = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
whether to trust the krebs root CA.
This implies that krebs can forge a certficate for every domain
'';
};
trustIntermediate = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
whether to trust the krebs ACME CA.
this only trusts the intermediate cert for .w and .r domains
'';
};
};
config = lib.mkMerge [
(lib.mkIf cfg.trustRoot {
security.pki.certificates = [ cfg.rootCA ];
})
(lib.mkIf cfg.trustIntermediate {
security.pki.certificates = [ cfg.intermediateCA ];
})
];
}

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@ -0,0 +1,29 @@
{ pkgs }:
pkgs.writers.writeDashBin "generate-intermediate-ca" ''
TMPDIR=$(mktemp -d)
trap "rm -rf $TMPDIR;" INT TERM EXIT
mkdir -p "$TMPDIR/krebs"
brain show ca/ca.key > "$TMPDIR/krebs/ca.key"
brain show ca/ca.crt > "$TMPDIR/krebs/ca.crt"
export STEPPATH="$TMPDIR/step"
cat << EOF > "$TMPDIR/intermediate.tpl"
{
"subject": {{ toJson .Subject }},
"keyUsage": ["certSign", "crlSign"],
"basicConstraints": {
"isCA": true,
"maxPathLen": 0
},
"nameConstraints": {
"critical": true,
"permittedDNSDomains": ["r" ,"w"]
}
}
EOF
${pkgs.step-cli}/bin/step certificate create "Krebs ACME CA" intermediate_ca.crt intermediate_ca.key \
--template "$TMPDIR/intermediate.tpl" \
--ca "$TMPDIR/krebs/ca.crt" \
--ca-key "$TMPDIR/krebs/ca.key" \
--no-password --insecure
''