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-rw-r--r--debian/changelog23
-rw-r--r--debian/lacme.install3
-rw-r--r--debian/patches/0003-Use-upstream-certicate-chain-instead-of-an-hardcoded.patch479
-rw-r--r--debian/patches/series1
4 files changed, 505 insertions, 1 deletions
diff --git a/debian/changelog b/debian/changelog
index 3366d21..a643159 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,26 @@
+lacme (0.5-1+deb10u2) buster; urgency=medium
+
+ * 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
+ * Additional current/planned CA certificates can be found under
+ /usr/local/share/lacme:
+ - lets-encrypt-e[12].pem
+ - lets-encrypt-r[34]-cross-signed.pem
+ - lets-encrypt-r[34].pem
+ - letsencryptauthorityx[34].pem
+ See https://letsencrypt.org/certificates/
+ * Moreover 'CAfile' now defaults to /usr/share/lacme/ca-certificates.crt
+ which is a concatenation of all known active CA certificates (which
+ includes the previous default).
+ Closes: #975862.
+
+ -- Guilhem Moulin <guilhem@debian.org> Thu, 26 Nov 2020 01:14:50 +0100
+
lacme (0.5-1+deb10u1) buster; urgency=medium
* Link to RFC 8555 <https://tools.ietf.org/html/rfc8555> instead of the
diff --git a/debian/lacme.install b/debian/lacme.install
index 303c121..220097d 100644
--- a/debian/lacme.install
+++ b/debian/lacme.install
@@ -1,4 +1,5 @@
-certs/lets-encrypt-x[1-4]-cross-signed.pem /usr/share/lacme
+certs/*.pem /usr/share/lacme
+/usr/share/lacme/ca-certificates.crt
client webserver /usr/lib/lacme
config/lacme-certs.conf config/lacme.conf /etc/lacme
lacme /usr/sbin
diff --git a/debian/patches/0003-Use-upstream-certicate-chain-instead-of-an-hardcoded.patch b/debian/patches/0003-Use-upstream-certicate-chain-instead-of-an-hardcoded.patch
new file mode 100644
index 0000000..1032af2
--- /dev/null
+++ b/debian/patches/0003-Use-upstream-certicate-chain-instead-of-an-hardcoded.patch
@@ -0,0 +1,479 @@
+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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+++240JxP2T35p0wKZXuskR5LBJJvmsSGPwSSB/GjMH2m6WPUZIvd0xhajggEIMIIB
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++MBIGA1UdEwEB/wQIMAYBAf8CAQAwHQYDVR0OBBYEFFrz7Sv8NsI3eblSMOpUb89V
++yy6sMB8GA1UdIwQYMBaAFHxClq7eS0g7+pL4nozPbYupcjeVMDIGCCsGAQUFBwEB
++BCYwJDAiBggrBgEFBQcwAoYWaHR0cDovL3gyLmkubGVuY3Iub3JnLzAnBgNVHR8E
++IDAeMBygGqAYhhZodHRwOi8veDIuYy5sZW5jci5vcmcvMCIGA1UdIAQbMBkwCAYG
++Z4EMAQIBMA0GCysGAQQBgt8TAQEBMAoGCCqGSM49BAMDA2cAMGQCMHt01VITjWH+
++Dbo/AwCd89eYhNlXLr3pD5xcSAQh8suzYHKOl9YST8pE9kLJ03uGqQIwWrGxtO3q
++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
++CQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJuZXQgU2VjdXJpdHkgUmVzZWFyY2gg
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++EgYDVR0TAQH/BAgwBgEB/wIBADAdBgNVHQ4EFgQUbZkq9U0C6+MRwWC6km+NPS7x
++6kQwHwYDVR0jBBgwFoAUfEKWrt5LSDv6kviejM9ti6lyN5UwMgYIKwYBBQUHAQEE
++JjAkMCIGCCsGAQUFBzAChhZodHRwOi8veDIuaS5sZW5jci5vcmcvMCcGA1UdHwQg
++MB4wHKAaoBiGFmh0dHA6Ly94Mi5jLmxlbmNyLm9yZy8wIgYDVR0gBBswGTAIBgZn
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++UAM1u34E36neL/Zba7ombkIOchSgx1iVxzqtFWGddgoG+tppRPWhuhhn
++-----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-----
++MIIEZTCCA02gAwIBAgIQQAF1BIMUpMghjISpDBbN3zANBgkqhkiG9w0BAQsFADA/
++MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
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++UdHkhVNcsAKX1H7GNNLOEADksd86wuoXvg==
++-----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-----
++MIIFFjCCAv6gAwIBAgIRAJErCErPDBinU/bWLiWnX1owDQYJKoZIhvcNAQELBQAw
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++nLRbwHOoq7hHwg==
++-----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-----
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++p8dyFwSAr23DYBIVeXDpxHhShvv0MLJzqqDFBTHYe1X5X2Y7oogy+UDJxV2N24/g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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-----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++AQUFBzAChiRodHRwOi8vY2VydC5yb290LXgxLmxldHNlbmNyeXB0Lm9yZy8wHwYD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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-----
++MIIFjTCCA3WgAwIBAgIRAJObmZ6kjhYNW0JZtD0gE9owDQYJKoZIhvcNAQELBQAw
++TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
++cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTYxMDA2MTU0NDM0
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++RW5jcnlwdDEjMCEGA1UEAxMaTGV0J3MgRW5jcnlwdCBBdXRob3JpdHkgWDQwggEi
++MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDhJHRCe7eRMdlz/ziq2M5EXLc5
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++LZZhUK1D3AqmT561Urmcju9O30azMdwg/GnCoyB1Puw4GzZOZmbS3/VmpJMve6YO
++lD5gPUpLHG+6tE0cPJFYbi9NxNpw2+0BOXbASefpNbUUBpDB5ZLiEP1rubSFAgMB
++AAGjggFnMIIBYzAOBgNVHQ8BAf8EBAMCAYYwEgYDVR0TAQH/BAgwBgEB/wIBADBU
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++LnJvb3QteDEubGV0c2VuY3J5cHQub3JnMHIGCCsGAQUFBwEBBGYwZDAwBggrBgEF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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
+
diff --git a/debian/patches/series b/debian/patches/series
index ddf7cce..fcf1c3f 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1,2 +1,3 @@
0001-Mention-the-Debian-BTS-in-the-manpages.patch
0002-Issue-GET-and-POST-as-GET-requests.patch
+0003-Use-upstream-certicate-chain-instead-of-an-hardcoded.patch