6 files changed, 179 insertions, 0 deletions
diff --git a/krebs/2configs/acme.nix b/krebs/2configs/acme.nix
new file mode 100644
index 000000000..b5e51a1a2
--- /dev/null
+++ b/krebs/2configs/acme.nix
@@ -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;
+      };
+    };
+  };
+}
diff --git a/krebs/2configs/default.nix b/krebs/2configs/default.nix
index 8a84d4465..ad77e6581 100644
--- a/krebs/2configs/default.nix
+++ b/krebs/2configs/default.nix
@@ -16,6 +16,9 @@ with import <stockholm/lib>;
   krebs.enable = true;
   krebs.tinc.retiolum.enable = mkDefault true;
 
+  # trust krebs ACME CA
+  krebs.ssl.trustIntermediate = true;
+
   krebs.build.user = mkDefault config.krebs.users.krebs;
 
   networking.hostName = config.krebs.build.host.name;
diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 0617e15b2..2772d8d37 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -48,6 +48,7 @@ let
       ./secret.nix
       ./setuid.nix
       ./shadow.nix
+      ./ssl.nix
       ./sync-containers.nix
       ./tinc.nix
       ./tinc_graphs.nix
diff --git a/krebs/3modules/krebs/default.nix b/krebs/3modules/krebs/default.nix
index f796f0323..35ed67f5f 100644
--- a/krebs/3modules/krebs/default.nix
+++ b/krebs/3modules/krebs/default.nix
@@ -76,6 +76,7 @@ in {
             "agenda.r"
             "build.r"
             "build.hotdog.r"
+            "ca.r"
             "cgit.hotdog.r"
             "irc.r"
             "wiki.r"
diff --git a/krebs/3modules/ssl.nix b/krebs/3modules/ssl.nix
new file mode 100644
index 000000000..5d28ac841
--- /dev/null
+++ b/krebs/3modules/ssl.nix
@@ -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-----
+        MIIC0jCCAjugAwIBAgIJAKeARo6lDD0YMA0GCSqGSIb3DQEBBQUAMIGBMQswCQYD
+        VQQGEwJaWjESMBAGA1UECAwJc3RhdGVsZXNzMRAwDgYDVQQKDAdLcmVic2NvMQsw
+        CQYDVQQLDAJLTTEWMBQGA1UEAwwNS3JlYnMgUm9vdCBDQTEnMCUGCSqGSIb3DQEJ
+        ARYYcm9vdC1jYUBzeW50YXgtZmVobGVyLmRlMB4XDTE0MDYxMTA4NTMwNloXDTM5
+        MDIwMTA4NTMwNlowgYExCzAJBgNVBAYTAlpaMRIwEAYDVQQIDAlzdGF0ZWxlc3Mx
+        EDAOBgNVBAoMB0tyZWJzY28xCzAJBgNVBAsMAktNMRYwFAYDVQQDDA1LcmVicyBS
+        b290IENBMScwJQYJKoZIhvcNAQkBFhhyb290LWNhQHN5bnRheC1mZWhsZXIuZGUw
+        gZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMs/WNyeQziccllLqom7bfCjlh6/
+        /qx9p6UOqpw96YOOT3sh/mNSBLyNxIUJbWsU7dN5hT7HkR7GwzpfKDtudd9qiZeU
+        QNYQ+OL0HdOnApjdPqdspZfKxKTXyC1T1vJlaODsM1RBrjLK9RUcQZeNhgg3iM9B
+        HptOCrMI2fjCdZuVAgMBAAGjUDBOMB0GA1UdDgQWBBSKeq01+rAwp7yAXwzlwZBo
+        3EGVLzAfBgNVHSMEGDAWgBSKeq01+rAwp7yAXwzlwZBo3EGVLzAMBgNVHRMEBTAD
+        AQH/MA0GCSqGSIb3DQEBBQUAA4GBAIWIffZuQ43ddY2/ZnjAxPCRpM3AjoKIwEj9
+        GZuLJJ1sB9+/PAPmRrpmUniRkPLD4gtmolDVuoLDNAT9os7/v90yg5dOuga33Ese
+        725musUbhEoQE1A1oVHrexBs2sQOplxHKsVXoYJp2/trQdqvaNaEKc3EeVnzFC63
+        80WiO952
+        -----END CERTIFICATE-----
+      '';
+    };
+    intermediateCA = lib.mkOption {
+      type = lib.types.str;
+      readOnly = true;
+      default = ''
+        -----BEGIN CERTIFICATE-----
+        MIICWzCCAcSgAwIBAgIQVavHn7XtM7NJ8bnph6hGoTANBgkqhkiG9w0BAQsFADCB
+        gTELMAkGA1UEBhMCWloxEjAQBgNVBAgMCXN0YXRlbGVzczEQMA4GA1UECgwHS3Jl
+        YnNjbzELMAkGA1UECwwCS00xFjAUBgNVBAMMDUtyZWJzIFJvb3QgQ0ExJzAlBgkq
+        hkiG9w0BCQEWGHJvb3QtY2FAc3ludGF4LWZlaGxlci5kZTAeFw0yMTEyMDgxNTU5
+        MDRaFw0yMTEyMDkxNTU5MDRaMBoxGDAWBgNVBAMTD0tyZWJzIEFDTUUgQ0EgMTBZ
+        MBMGByqGSM49AgEGCCqGSM49AwEHA0IABDOK4g3pJPhOErk49zQgpNKE1cAyoeLp
+        PqWXkHZVLIVg8CBzPyCYiHS8RtaJ1kwWxwo5OTypCDOLxf1isR5HgZOjgYAwfjAO
+        BgNVHQ8BAf8EBAMCAQYwEgYDVR0TAQH/BAgwBgEB/wIBADAdBgNVHQ4EFgQUv758
+        A4RPewsRtgjdB6AE1tn632swHwYDVR0jBBgwFoAUinqtNfqwMKe8gF8M5cGQaNxB
+        lS8wGAYDVR0eAQH/BA4wDKAKMAOCAXIwA4IBdzANBgkqhkiG9w0BAQsFAAOBgQAT
+        ewOSGWGTCWcJFGSxgnt8/WspMERq1hL1PikwwVMp7wzJmbHcbA0Es4fcrE5Xf8vQ
+        dGenlvyQjkQNahbsyGBoja7bpWpnw9qofLQkns1AZWp7q7GBqyKm30keM/E/stjH
+        YkgY4QaxlIL+6N0f4nKL3RSf6GQ1hWJOHf+RrboaMw==
+        -----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 ];
+    })
+  ];
+}
diff --git a/krebs/5pkgs/simple/generate-krebs-intermediate-ca/default.nix b/krebs/5pkgs/simple/generate-krebs-intermediate-ca/default.nix
new file mode 100644
index 000000000..8cec54327
--- /dev/null
+++ b/krebs/5pkgs/simple/generate-krebs-intermediate-ca/default.nix
@@ -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
+''