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path: root/debian/patches/0003-Use-upstream-certicate-chain-instead-of-an-hardcoded.patch
blob: 1032af29384ee795d8fc36bc1578169456aa4748 (plain)
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From d3c9435c4f43167b9d5c9315044f50b8878a2881 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Thu, 26 Nov 2020 01:10:38 +0100
Subject: Use upstream certificate chain instead of an hardcoded one.

This is a breaking change.  The certificate indicated by 'CAfile' is no
longer used as is in 'certificate-chain' (along with the leaf cert).
The chain returned by the ACME v2 endpoint is used instead.  This allows
for more flexbility with respect to key/CA rotation, cf.
https://letsencrypt.org/2020/11/06/own-two-feet.html and
https://community.letsencrypt.org/t/beginning-issuance-from-r3/139018

Moreover 'CAfile' now defaults to @@datadir@@/lacme/ca-certificates.crt
which is a concatenation of all known active CA certificates (which
includes the previous default).
---
 Makefile                               |  9 ++++++-
 certs/lets-encrypt-e1.pem              | 17 +++++++++++++
 certs/lets-encrypt-e2.pem              | 17 +++++++++++++
 certs/lets-encrypt-r3-cross-signed.pem | 26 +++++++++++++++++++
 certs/lets-encrypt-r3.pem              | 30 ++++++++++++++++++++++
 certs/lets-encrypt-r4-cross-signed.pem | 26 +++++++++++++++++++
 certs/lets-encrypt-r4.pem              | 30 ++++++++++++++++++++++
 certs/letsencryptauthorityx3.pem       | 32 +++++++++++++++++++++++
 certs/letsencryptauthorityx4.pem       | 32 +++++++++++++++++++++++
 client                                 | 15 +----------
 config/lacme-certs.conf                | 11 ++++----
 lacme                                  | 35 ++++++++++++++++----------
 lacme.md                               | 13 ++++------
 13 files changed, 251 insertions(+), 42 deletions(-)
 create mode 100644 certs/lets-encrypt-e1.pem
 create mode 100644 certs/lets-encrypt-e2.pem
 create mode 100644 certs/lets-encrypt-r3-cross-signed.pem
 create mode 100644 certs/lets-encrypt-r3.pem
 create mode 100644 certs/lets-encrypt-r4-cross-signed.pem
 create mode 100644 certs/lets-encrypt-r4.pem
 create mode 100644 certs/letsencryptauthorityx3.pem
 create mode 100644 certs/letsencryptauthorityx4.pem

diff --git a/Makefile b/Makefile
index 5d421bf..99ce749 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,14 @@ install: ${MANPAGES}
 	install -m0644 -t $(DESTDIR)/etc/lacme config/*.conf
 	install -m0644 -t $(DESTDIR)/etc/lacme snippets/*.conf
 	install -d $(DESTDIR)/usr/share/lacme
-	install -m0644 -t $(DESTDIR)/usr/share/lacme certs/lets-encrypt-x[1-4]-cross-signed.pem
+	install -m0644 -t $(DESTDIR)/usr/share/lacme certs/*
+	# used for validation, see https://letsencrypt.org/certificates/
+	cat certs/letsencryptauthorityx[34].pem \
+        certs/lets-encrypt-x[34]-cross-signed.pem \
+        certs/lets-encrypt-r[34].pem \
+        certs/lets-encrypt-r[34]-cross-signed.pem \
+        certs/lets-encrypt-e[12].pem \
+		>$(DESTDIR)/usr/share/lacme/ca-certificates.crt
 	install -d $(DESTDIR)/usr/lib/lacme
 	install -m0755 -t $(DESTDIR)/usr/lib/lacme client webserver
 	install -d $(DESTDIR)/usr/share/man/man1
diff --git a/certs/lets-encrypt-e1.pem b/certs/lets-encrypt-e1.pem
new file mode 100644
index 0000000..2a19d41
--- /dev/null
+++ b/certs/lets-encrypt-e1.pem
@@ -0,0 +1,17 @@
+-----BEGIN CERTIFICATE-----
+MIICxjCCAk2gAwIBAgIRALO93/inhFu86QOgQTWzSkUwCgYIKoZIzj0EAwMwTzEL
+MAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2VhcmNo
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+YJkgsTgDyj2gJrjubi1K9sZmHzOa25JK1fUpE8ZwYii6I4zPPS/Lgul/
+-----END CERTIFICATE-----
diff --git a/certs/lets-encrypt-e2.pem b/certs/lets-encrypt-e2.pem
new file mode 100644
index 0000000..0fd9f40
--- /dev/null
+++ b/certs/lets-encrypt-e2.pem
@@ -0,0 +1,17 @@
+-----BEGIN CERTIFICATE-----
+MIICxjCCAkygAwIBAgIQTtI99q9+x/mwxHJv+VEqdzAKBggqhkjOPQQDAzBPMQsw
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+-----END CERTIFICATE-----
diff --git a/certs/lets-encrypt-r3-cross-signed.pem b/certs/lets-encrypt-r3-cross-signed.pem
new file mode 100644
index 0000000..1d82449
--- /dev/null
+++ b/certs/lets-encrypt-r3-cross-signed.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/certs/lets-encrypt-r3.pem b/certs/lets-encrypt-r3.pem
new file mode 100644
index 0000000..43b222a
--- /dev/null
+++ b/certs/lets-encrypt-r3.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/certs/lets-encrypt-r4-cross-signed.pem b/certs/lets-encrypt-r4-cross-signed.pem
new file mode 100644
index 0000000..f0ed3cd
--- /dev/null
+++ b/certs/lets-encrypt-r4-cross-signed.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----
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+JW6Z8JNhcnuBwATHMCeJVCFapoZsPfQQ6Q==
+-----END CERTIFICATE-----
diff --git a/certs/lets-encrypt-r4.pem b/certs/lets-encrypt-r4.pem
new file mode 100644
index 0000000..578b3bd
--- /dev/null
+++ b/certs/lets-encrypt-r4.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
+MIIFFjCCAv6gAwIBAgIRAIp5IlCr5SxSbO7Pf8lC3WIwDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
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+z81ZdUTJoQp7nz8bDjpmb7Z1z4vLr53AcMX/0oIKr13N4uichZSk5gA16H5OOYHH
+IYlgd+odlvKLg3tHxG0ywFJ+Ix5FtXHuo+8XwgOpk4nd9Z/buvHa4H6Xh3GBHhqC
+VuQ+fBiiCOUWX6j6qOBIUU0YFKAMo+W2yrO1VRJrcsdafzuM+efZ0Y4STTMzAyrx
+E+FCPMIuWWAubeAHRzNl39Jnyk2FAgMBAAGjggEIMIIBBDAOBgNVHQ8BAf8EBAMC
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+k26umjuCyioWs2icOlZznPTcZvbfq02YPHGTCu3ctggVDULJ+fwOxKekzIqeyLNk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+-----END CERTIFICATE-----
diff --git a/certs/letsencryptauthorityx3.pem b/certs/letsencryptauthorityx3.pem
new file mode 100644
index 0000000..4e82cb5
--- /dev/null
+++ b/certs/letsencryptauthorityx3.pem
@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
+MIIFjTCCA3WgAwIBAgIRANOxciY0IzLc9AUoUSrsnGowDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
+cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTYxMDA2MTU0MzU1
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+RW5jcnlwdDEjMCEGA1UEAxMaTGV0J3MgRW5jcnlwdCBBdXRob3JpdHkgWDMwggEi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+-----END CERTIFICATE-----
diff --git a/certs/letsencryptauthorityx4.pem b/certs/letsencryptauthorityx4.pem
new file mode 100644
index 0000000..34064da
--- /dev/null
+++ b/certs/letsencryptauthorityx4.pem
@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/client b/client
index 838b184..52aab3d 100755
--- a/client
+++ b/client
@@ -338,20 +338,7 @@ elsif ($COMMAND eq 'newOrder') {
         die "Timeout exceeded while waiting for certificate\n" if $timeout > 0 and $i >= $timeout;
         sleep $retry_after;
     }
-
-    # keep only the leaf certificate
-    pipe my $rd, my $wd or die "Can't pipe: $!";
-    my $pid = fork // die "Can't fork: $!";
-    unless ($pid) {
-        open STDIN, '<&', $rd or die "Can't dup: $!";
-        exec qw/openssl x509 -outform PEM/ or die;
-    }
-    $rd->close() or die "Can't close: $!";
-    $wd->print( $r->decoded_content() );
-    $wd->close() or die "Can't close: $!";
-
-    waitpid $pid => 0;
-    die $? if $? > 0;
+    print $r->decoded_content();
 }
 
 
diff --git a/config/lacme-certs.conf b/config/lacme-certs.conf
index 97d588a..7a9ba29 100644
--- a/config/lacme-certs.conf
+++ b/config/lacme-certs.conf
@@ -20,8 +20,8 @@
 #
 #certificate = /etc/nginx/ssl/srv.pem
 
-# Where to store the issued certificate, concatenated with the content
-# of the file specified specified with the CAfile option (in PEM format).
+# Where to store the issued certificate along with its chain of trust
+# (in PEM format).
 #
 #certificate-chain = /etc/nginx/ssl/srv.chain.pem
 
@@ -30,11 +30,10 @@
 #
 #min-days = 21
 
-# Path to the issuer's certificate.  This is used for certificate-chain
-# and to verify the validity of each issued certificate.  Specifying an
-# empty value skip certificate validation.
+# Path to trusted issuer certificates, used for validating each issued
+# certificate.  Specifying an empty value skips certificate validation.
 #
-#CAfile = /usr/share/lacme/lets-encrypt-x3-cross-signed.pem
+#CAfile = /usr/share/lacme/ca-certificates.crt
 
 # Subject field of the Certificate Signing Request.  This option is
 # required.
diff --git a/lacme b/lacme
index 3e5347d..8f03d38 100755
--- a/lacme
+++ b/lacme
@@ -609,12 +609,10 @@ sub spawn($@) {
 
 
 #############################################################################
-# Install the certificate
+# Install the certificate (optionally excluding the chain of trust)
 #
 sub install_cert($$;$) {
-    my $filename = shift;
-    my $x509 = shift;
-    my @chain = grep !/\A\s*\z/, @_; # ignore empty CAfile
+    my ($filename, $chain, $leafonly) = @_;
 
     my ($dirname, $basename) =
         $filename =~ /\A(.*)\/([^\/]+)\z/ ? ($1, $2) : ('.', $filename);
@@ -624,12 +622,23 @@ sub install_cert($$;$) {
     eval {
         my $umask = umask() // die "umask: $!";
         chmod(0644 &~ $umask, $fh) or die "chmod: $!";
-        $fh->print($x509) or die "Can't print: $!";
-        foreach (@chain) { # append the chain
-            open my $fh2, '<', $_ or die "Can't open $_: $!";
-            my $ca = do { local $/ = undef; $fh2->getline() };
-            $fh2->close() or die "Can't close: $!";
-            $fh->print($ca) or die "Can't print: $!";
+        if ($leafonly) {
+            # keep only the leaf certificate
+            pipe my $rd, my $wd or die "Can't pipe: $!";
+            my $pid = fork // die "Can't fork: $!";
+            unless ($pid) {
+                open STDIN,  '<&', $rd or die "Can't dup: $!";
+                open STDOUT, '>&', $fh or die "Can't dup: $!";
+                exec qw/openssl x509 -outform PEM/ or die;
+            }
+            $rd->close() or die "Can't close: $!";
+            $wd->print($chain);
+            $wd->close() or die "Can't close: $!";
+
+            waitpid $pid => 0;
+            die $? if $? > 0;
+        } else {
+            $fh->print($chain) or die "Can't print: $!";
         }
         $fh->close() or die "Can't close: $!";
     };
@@ -767,7 +776,7 @@ elsif ($COMMAND eq 'newOrder' or $COMMAND eq 'new-cert') {
         };
 
         # verify certificate validity against the CA
-        $conf->{CAfile} //= '/usr/share/lacme/lets-encrypt-x3-cross-signed.pem';
+        $conf->{CAfile} //= '/usr/share/lacme/ca-certificates.crt';
         if ($conf->{CAfile} ne '' and spawn({in => $x509}, 'openssl', 'verify', '-CAfile', $conf->{CAfile},
                                                                       qw/-purpose sslserver -x509_strict/)) {
             print STDERR "[$s] Error: Received invalid X.509 certificate from ACME server!\n";
@@ -778,11 +787,11 @@ elsif ($COMMAND eq 'newOrder' or $COMMAND eq 'new-cert') {
         # install certificate
         if (defined $conf->{'certificate'}) {
             print STDERR "Installing X.509 certificate $conf->{'certificate'}\n";
-            install_cert($conf->{'certificate'}, $x509);
+            install_cert($conf->{'certificate'}, $x509, 1);
         }
         if (defined $conf->{'certificate-chain'}) {
             print STDERR "Installing X.509 certificate chain $conf->{'certificate-chain'}\n";
-            install_cert($conf->{'certificate-chain'}, $x509, $conf->{CAfile});
+            install_cert($conf->{'certificate-chain'}, $x509);
         }
 
         if (defined $conf->{chown}) {
diff --git a/lacme.md b/lacme.md
index 2d70c49..28d1a53 100644
--- a/lacme.md
+++ b/lacme.md
@@ -327,9 +327,8 @@ Valid options are:
 
 *certificate-chain*
 
-:   Where to store the issued certificate, concatenated with the content
-    of the file specified specified with the *CAfile* option (in PEM
-    format).
+:   Where to store the issued certificate along with its chain of trust
+    (in PEM format).
     At least one of *certificate* or *certificate-chain* is required.
 
 *certificate-key*
@@ -351,11 +350,9 @@ Valid options are:
 
 *CAfile*
 
-:   Path to the issuer's certificate.  This is used for
-    *certificate-chain* and to verify the validity of each issued
-    certificate.
-    Specifying an empty value skip certificate validation.
-    Default: `/usr/share/lacme/lets-encrypt-x3-cross-signed.pem`.
+:   Path to trusted issuer certificates, used for validating each issued
+    certificate.  Specifying an empty values skips certificate validation.
+    Default: `/usr/share/lacme/ca-certificates.crt`.
 
 *hash*
 
-- 
2.29.2