certtool: added option to apply a certificate verification profile

This applies to the --verify and --verify-chain commands.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

9 files changed, 256 insertions, 2 deletions

diff --git a/NEWS b/NEWS
index c9fcd6c2b7..049f3b4ee0 100644
--- a/NEWS
+++ b/NEWS
@@ -23,6 +23,10 @@ See the end for copying conditions.
 ** libgnutls: The min-verification-profile from system configuration applies
    for all certificate verifications, not only under TLS.
 
+** certtool: Added the --verify-profile option to set a certificate
+   verification profile. Use '--verify-profile low' for certificate verification
+   to apply the 'NORMAL' verification profile.
+
 ** API and ABI modifications:
 gnutls_ocsp_req_const_t: Added
 
diff --git a/src/certtool-args.def b/src/certtool-args.def
index 915598d446..f10f57bdbb 100644
--- a/src/certtool-args.def
+++ b/src/certtool-args.def
@@ -355,6 +355,17 @@ flag = {
     doc = "This can be combined with --p7-verify, --verify or --verify-chain.";
 };
 
+flag = {
+    name      = verify-profile;
+    descrip   = "Specify a security level profile to be used for verification";
+    arg-type  = string;
+    doc = "This option can be used to specify a certificate verification profile. Certificate
+    verification profiles correspond to the security level. This should be one of
+    'none', 'very weak', 'low', 'legacy', 'medium', 'high', 'ultra',
+    'future'. Note that by default no profile is applied, unless one is set
+    as minimum in the gnutls configuration file.";
+};
+
 //----------------------------------------
 flag = {
     name = pkcs7_options;
diff --git a/src/certtool-common.h b/src/certtool-common.h
index 7217e69dec..bfeb66b2da 100644
--- a/src/certtool-common.h
+++ b/src/certtool-common.h
@@ -80,6 +80,8 @@ typedef struct common_info {
 
 	unsigned rsa_pss_sign;
 	unsigned sort_chain;
+
+	gnutls_sec_param_t verification_profile;
 } common_info_st;
 
 static inline
diff --git a/src/certtool.c b/src/certtool.c
index 34188f4c6d..447f02f765 100644
--- a/src/certtool.c
+++ b/src/certtool.c
@@ -1422,6 +1422,20 @@ static void cmd_parser(int argc, char **argv)
 		cinfo.password = "";
 	}
 
+	if (HAVE_OPT(VERIFY_PROFILE)) {
+		if (strcasecmp(OPT_ARG(VERIFY_PROFILE), "none")) {
+			cinfo.verification_profile = GNUTLS_PROFILE_UNKNOWN;
+		} else {
+			cinfo.verification_profile = gnutls_certificate_verification_profile_get_id(OPT_ARG(VERIFY_PROFILE));
+		}
+	} else if (!HAVE_OPT(VERIFY_ALLOW_BROKEN)) {
+		if (HAVE_OPT(VERIFY_CHAIN) || HAVE_OPT(VERIFY)) {
+			fprintf(stderr, "Note that no verification profile was selected. In the future the medium profile will be enabled by default.\n");
+			fprintf(stderr, "Use --verify-profile low to apply the default verification of NORMAL priority string.\n");
+		}
+		/* cinfo.verification_profile = GNUTLS_PROFILE_LOW; */
+	}
+
 	if (HAVE_OPT(SIGN_PARAMS))
 		sign_params_to_flags(&cinfo, OPT_ARG(SIGN_PARAMS));
 
@@ -2395,6 +2409,7 @@ _verify_x509_mem(const void *cert, int cert_size, common_info_st *cinfo,
 	}
 
 	vflags = GNUTLS_VERIFY_DO_NOT_ALLOW_SAME;
+	vflags |= GNUTLS_PROFILE_TO_VFLAGS(cinfo->verification_profile);
 
 	if (HAVE_OPT(VERIFY_ALLOW_BROKEN))
 		vflags |= GNUTLS_VERIFY_ALLOW_BROKEN;
diff --git a/tests/cert-tests/Makefile.am b/tests/cert-tests/Makefile.am
index e0b4b68201..862557b5a3 100644
--- a/tests/cert-tests/Makefile.am
+++ b/tests/cert-tests/Makefile.am
@@ -98,7 +98,8 @@ EXTRA_DIST = data/ca-no-pathlen.pem data/no-ca-or-pathlen.pem data/aki-cert.pem
 	data/key-gost01.p8 data/key-gost01-2.p8 data/key-gost01-2-enc.p8 \
 	data/key-gost12-256.p8 data/key-gost12-256-2.p8 data/key-gost12-256-2-enc.p8 \
 	data/key-gost12-512.p8 data/grfc.crt data/gost-cert-ca.pem data/gost-cert-new.pem \
-	data/cert-with-non-digits-time-ca.pem data/cert-with-non-digits-time.pem
+	data/cert-with-non-digits-time-ca.pem data/cert-with-non-digits-time.pem \
+	data/chain-512-leaf.pem data/chain-512-subca.pem data/chain-512-ca.pem
 
 dist_check_SCRIPTS = pathlen aki invalid-sig email \
 	pkcs7 pkcs7-broken-sigs privkey-import name-constraints certtool-long-cn crl provable-privkey \
@@ -108,7 +109,7 @@ dist_check_SCRIPTS = pathlen aki invalid-sig email \
 	pkcs12 certtool-crl-decoding pkcs12-encode pkcs12-corner-cases inhibit-anypolicy \
 	smime cert-time alt-chain pkcs7-list-sign pkcs7-eddsa certtool-ecdsa \
 	key-id pkcs8 pkcs8-decode ecdsa illegal-rsa pkcs8-invalid key-invalid \
-	pkcs8-eddsa certtool-subca cert-non-digits-time
+	pkcs8-eddsa certtool-subca cert-non-digits-time certtool-verify-profiles
 
 dist_check_SCRIPTS += key-id ecdsa pkcs8-invalid key-invalid pkcs8-decode pkcs8 pkcs8-eddsa \
 	certtool-utf8 crq
diff --git a/tests/cert-tests/certtool-verify-profiles b/tests/cert-tests/certtool-verify-profiles
new file mode 100755
index 0000000000..a7ebd711ea
--- /dev/null
+++ b/tests/cert-tests/certtool-verify-profiles
@@ -0,0 +1,78 @@
+#!/bin/sh
+
+# Copyright (C) 2017 Nikos Mavrogiannopoulos
+#
+# This file is part of GnuTLS.
+#
+# GnuTLS is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 3 of the License, or (at
+# your option) any later version.
+#
+# GnuTLS is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GnuTLS; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+#set -e
+
+srcdir="${srcdir:-.}"
+CERTTOOL="${CERTTOOL:-../../src/certtool${EXEEXT}}"
+DIFF="${DIFF:-diff -b -B}"
+
+if ! test -x "${CERTTOOL}"; then
+	exit 77
+fi
+
+if ! test -z "${VALGRIND}"; then
+	VALGRIND="${LIBTOOL:-libtool} --mode=execute ${VALGRIND} --error-exitcode=15"
+fi
+
+OUTFILE=out-pkcs7.$$.tmp
+
+. ${srcdir}/../scripts/common.sh
+
+check_for_datefudge
+
+echo "Checking chain with insecure leaf"
+datefudge -s "2019-12-19" \
+${VALGRIND} "${CERTTOOL}" --verify-chain --verify-profile=medium --infile "${srcdir}/data/chain-512-leaf.pem" >${OUTFILE}
+rc=$?
+
+if test "${rc}" != "1"; then
+	echo "insecure chain succeeded verification (1)"
+	cat $OUTFILE
+	exit ${rc}
+fi
+
+echo "Checking chain with insecure subca"
+datefudge -s "2019-12-19" \
+${VALGRIND} "${CERTTOOL}" --verify-chain --verify-profile=medium --infile "${srcdir}/data/chain-512-subca.pem" >${OUTFILE}
+rc=$?
+
+if test "${rc}" != "1"; then
+	echo "insecure chain succeeded verification (2)"
+	cat $OUTFILE
+	exit ${rc}
+fi
+
+
+echo "Checking chain with insecure ca"
+datefudge -s "2019-12-19" \
+${VALGRIND} "${CERTTOOL}" --verify-chain --verify-profile=medium --infile "${srcdir}/data/chain-512-ca.pem" >${OUTFILE}
+rc=$?
+
+if test "${rc}" != "1"; then
+	echo "insecure chain succeeded verification (3)"
+	cat $OUTFILE
+	exit ${rc}
+fi
+
+
+rm -f "${OUTFILE}"
+
+exit 0
diff --git a/tests/cert-tests/data/chain-512-ca.pem b/tests/cert-tests/data/chain-512-ca.pem
new file mode 100644
index 0000000000..57b9850fae
--- /dev/null
+++ b/tests/cert-tests/data/chain-512-ca.pem
@@ -0,0 +1,45 @@
+-----BEGIN CERTIFICATE-----
+MIIDATCCAbmgAwIBAgIUf62L1YAmuKuNR4Bnwn4FEjFDpOcwPQYJKoZIhvcNAQEK
+MDCgDTALBglghkgBZQMEAgGhGjAYBgkqhkiG9w0BAQgwCwYJYIZIAWUDBAIBogMC
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+2PSL3ng=
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/cert-tests/data/chain-512-leaf.pem b/tests/cert-tests/data/chain-512-leaf.pem
new file mode 100644
index 0000000000..f8a4ce1c9b
--- /dev/null
+++ b/tests/cert-tests/data/chain-512-leaf.pem
@@ -0,0 +1,52 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/cert-tests/data/chain-512-subca.pem b/tests/cert-tests/data/chain-512-subca.pem
new file mode 100644
index 0000000000..261137b28a
--- /dev/null
+++ b/tests/cert-tests/data/chain-512-subca.pem
@@ -0,0 +1,46 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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