2:08 p.m.
This test was moved from IWD, with required changes to the API
---
Makefile.am | 6 +-
unit/test-ecdh.c | 166 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 171 insertions(+), 1 deletion(-)
create mode 100644 unit/test-ecdh.c
diff --git a/Makefile.am b/Makefile.am
index 69c3cea..dc16a2c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -165,7 +165,8 @@ unit_tests = unit/test-unit \
unit/test-pbkdf2 \
unit/test-dhcp \
unit/test-dir-watch \
- unit/test-ecc
+ unit/test-ecc \
+ unit/test-ecdh
dbus_tests = unit/test-hwdb \
unit/test-dbus \
@@ -286,6 +287,9 @@ unit_test_dir_watch_LDADD = ell/libell-private.la
unit_test_ecc_LDADD = ell/libell-private.la
+unit_test_ecdh_LDADD = ell/libell-private.la
+unit_test_ecdh_LDFLAGS = -Wl,-wrap,l_getrandom
+
if MAINTAINER_MODE
noinst_LTLIBRARIES += unit/example-plugin.la
endif
diff --git a/unit/test-ecdh.c b/unit/test-ecdh.c
new file mode 100644
index 0000000..efc47de
--- /dev/null
+++ b/unit/test-ecdh.c
@@ -0,0 +1,166 @@
+/*
+ *
+ * Embedded Linux library
+ *
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <assert.h>
+#include <ell/ell.h>
+
+static bool use_real_getrandom = true;
+
+bool __wrap_l_getrandom(void *buf, size_t len);
+bool __real_l_getrandom(void *buf, size_t len);
+
+bool __wrap_l_getrandom(void *buf, size_t len)
+{
+ static const uint8_t random_buf[] = { 0x75, 0xc5, 0xfe, 0x3e, 0x53,
+ 0xcc, 0x33, 0x33, 0x64, 0xea,
+ 0xdd, 0xa1, 0xe6, 0x62, 0x7a,
+ 0xb1, 0x98, 0xa7, 0xa0, 0x1e,
+ 0xac, 0x4b, 0x1d, 0xb8, 0x71,
+ 0x5b, 0x1d, 0x00, 0x36, 0xd0,
+ 0x0f, 0xde };
+
+ if (use_real_getrandom)
+ return __real_l_getrandom(buf, len);
+
+ memcpy(buf, random_buf, len);
+
+ return true;
+}
+
+/*
+ * Tests the most basic case. Generate two full public keys and use to create
+ * two identical shared secrets.
+ */
+static void test_basic(const void *data)
+{
+ struct l_ecc_curve *curve = l_ecc_curve_get(19);
+ uint8_t private1[32];
+ uint8_t private2[32];
+
+ uint8_t public1[64];
+ uint8_t public2[64];
+
+ uint8_t secret1[32];
+ uint8_t secret2[32];
+
+ assert(l_ecdh_generate_key_pair(curve, private1, 32, public1, 64));
+ assert(l_ecdh_generate_key_pair(curve, private2, 32, public2, 64));
+
+ assert(l_ecdh_generate_shared_secret(curve, private1, public2, 64,
+ secret1, 32));
+ assert(l_ecdh_generate_shared_secret(curve, private2, public1, 64,
+ secret2, 32));
+
+ assert(!memcmp(secret1, secret2, 32));
+}
+
+/*
+ * Tests public key compliance. When generating the public keys, only specify
+ * half their length (32). This requires ECDH to compute the remainder of the
+ * public key when generating the shared secret.
+ */
+static void test_compliant_key(const void *data)
+{
+ struct l_ecc_curve *curve = l_ecc_curve_get(19);
+
+ uint8_t private1[32];
+ uint8_t private2[32];
+
+ uint8_t public1[32];
+ uint8_t public2[32];
+
+ uint8_t secret1[32];
+ uint8_t secret2[32];
+
+ assert(l_ecdh_generate_key_pair(curve, private1, 32, public1, 32));
+ assert(l_ecdh_generate_key_pair(curve, private2, 32, public2, 32));
+
+ assert(l_ecdh_generate_shared_secret(curve, private1, public2, 32,
+ secret1, 32));
+ assert(l_ecdh_generate_shared_secret(curve, private2, public1, 32,
+ secret2, 32));
+
+ assert(!memcmp(secret1, secret2, 32));
+}
+
+/*
+ * Test vector from RFC 5114 - 256-bit Random ECP Group
+ */
+static void test_vectors(const void *data)
+{
+ struct l_ecc_curve *curve = l_ecc_curve_get(19);
+
+ uint64_t a_secret[4] = { 0x867B7291D507A3AFull, 0x3FAF432A5ABCE59Eull,
+ 0xE96A8E337A128499ull, 0x814264145F2F56F2ull };
+ uint64_t a_public[8] = { 0x5E8D3B4BA83AEB15ull, 0x7165BE50BC42AE4Aull,
+ 0xC9B5A8D4160D09E9ull, 0x2AF502F3BE8952F2ull,
+ 0xC0F5015ECE5EFD85ull, 0x6795BD4BFF6E6DE3ull,
+ 0x8681A0F9872D79D5ull, 0xEB0FAF4CA986C4D3ull };
+
+ uint64_t b_secret[4] = { 0xEE1B593761CF7F41ull, 0x19CE6BCCAD562B8Eull,
+ 0xDB95A200CC0AB26Aull, 0x2CE1788EC197E096ull };
+ uint64_t b_public[8] = { 0xB3AB0715F6CE51B0ull, 0xAE06AAEA279FA775ull,
+ 0x5346E8DE6C2C8646ull, 0xB120DE4AA3649279ull,
+ 0x85C34DDE5708B2B6ull, 0x3727027092A84113ull,
+ 0xD8EC685FA3F071D8ull, 0x9F1B7EECE20D7B5Eull };
+
+ uint64_t shared_secret[4] = { 0x7F80D21C820C2788ull,
+ 0xF5811E9DC8EC8EEAull,
+ 0x93310412D19A08F1ull,
+ 0xDD0F5396219D1EA3ull };
+
+ uint64_t a_shared[4];
+ uint64_t b_shared[4];
+
+ use_real_getrandom = false;
+
+ assert(l_ecdh_generate_shared_secret(curve, a_secret,
+ (const void *) b_public,
+ 64, a_shared, 32));
+ assert(l_ecdh_generate_shared_secret(curve, b_secret,
+ (const void *) a_public,
+ 64, b_shared, 32));
+
+ assert(!memcmp(a_shared, shared_secret, 32));
+ assert(!memcmp(b_shared, shared_secret, 32));
+
+ use_real_getrandom = true;
+}
+
+int main(int argc, char *argv[])
+{
+ l_test_init(&argc, &argv);
+
+ if (l_getrandom_is_supported()) {
+ l_test_add("ECDH Basic", test_basic, NULL);
+ l_test_add("ECDH Compliant key", test_compliant_key, NULL);
+ }
+
+ l_test_add("ECDH test vector", test_vectors, NULL);
+
+ return l_test_run();
+}
--
2.17.1