3 files changed, 225 insertions, 0 deletions

diff --git a/regress/unittests/kex/Makefile b/regress/unittests/kex/Makefile
new file mode 100644
index 000000000..6532cb00a
--- /dev/null
+++ b/regress/unittests/kex/Makefile
@@ -0,0 +1,14 @@
+#       $OpenBSD: Makefile,v 1.2 2015/01/24 10:39:21 miod Exp $
+
+TEST_ENV=      "MALLOC_OPTIONS=AFGJPRX"
+
+PROG=test_kex
+SRCS=tests.c test_kex.c
+REGRESS_TARGETS=run-regress-${PROG}
+
+run-regress-${PROG}: ${PROG}
+        env ${TEST_ENV} ./${PROG}
+
+.include <bsd.regress.mk>
+
+LDADD+=-lz
diff --git a/regress/unittests/kex/test_kex.c b/regress/unittests/kex/test_kex.c
new file mode 100644
index 000000000..c61e2bdbb
--- /dev/null
+++ b/regress/unittests/kex/test_kex.c
@@ -0,0 +1,197 @@
+/*      $OpenBSD: test_kex.c,v 1.1 2015/01/15 23:41:29 markus Exp $ */
+/*
+ * Regress test KEX
+ *
+ * Placed in the public domain
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+#include "../test_helper/test_helper.h"
+
+#include "ssherr.h"
+#include "ssh_api.h"
+#include "sshbuf.h"
+#include "packet.h"
+#include "myproposal.h"
+
+struct ssh *active_state = NULL; /* XXX - needed for linking */
+
+void kex_tests(void);
+static int do_debug = 0;
+
+static int
+do_send_and_receive(struct ssh *from, struct ssh *to)
+{
+        u_char type;
+        size_t len;
+        const u_char *buf;
+        int r;
+
+        for (;;) {
+                if ((r = ssh_packet_next(from, &type)) != 0) {
+                        fprintf(stderr, "ssh_packet_next: %s\n", ssh_err(r));
+                        return r;
+                }
+                if (type != 0)
+                        return 0;
+                buf = ssh_output_ptr(from, &len);
+                if (do_debug)
+                        printf("%zu", len);
+                if (len == 0)
+                        return 0;
+                if ((r = ssh_output_consume(from, len)) != 0 ||
+                    (r = ssh_input_append(to, buf, len)) != 0)
+                        return r;
+        }
+}
+
+static void
+run_kex(struct ssh *client, struct ssh *server)
+{
+        int r = 0;
+
+        while (!server->kex->done || !client->kex->done) {
+                if (do_debug)
+                        printf(" S:");
+                if ((r = do_send_and_receive(server, client)))
+                        break;
+                if (do_debug)
+                        printf(" C:");
+                if ((r = do_send_and_receive(client, server)))
+                        break;
+        }
+        if (do_debug)
+                printf("done: %s\n", ssh_err(r));
+        ASSERT_INT_EQ(r, 0);
+        ASSERT_INT_EQ(server->kex->done, 1);
+        ASSERT_INT_EQ(client->kex->done, 1);
+}
+
+static void
+do_kex_with_key(char *kex, int keytype, int bits)
+{
+        struct ssh *client = NULL, *server = NULL, *server2 = NULL;
+        struct sshkey *private, *public;
+        struct sshbuf *state;
+        struct kex_params kex_params;
+        char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
+
+        TEST_START("sshkey_generate");
+        ASSERT_INT_EQ(sshkey_generate(keytype, bits, &private), 0);
+        TEST_DONE();
+
+        TEST_START("sshkey_from_private");
+        ASSERT_INT_EQ(sshkey_from_private(private, &public), 0);
+        TEST_DONE();
+
+        TEST_START("ssh_init");
+        memcpy(kex_params.proposal, myproposal, sizeof(myproposal));
+        if (kex != NULL)
+                kex_params.proposal[PROPOSAL_KEX_ALGS] = kex;
+        ASSERT_INT_EQ(ssh_init(&client, 0, &kex_params), 0);
+        ASSERT_INT_EQ(ssh_init(&server, 1, &kex_params), 0);
+        ASSERT_PTR_NE(client, NULL);
+        ASSERT_PTR_NE(server, NULL);
+        TEST_DONE();
+
+        TEST_START("ssh_add_hostkey");
+        ASSERT_INT_EQ(ssh_add_hostkey(server, private), 0);
+        ASSERT_INT_EQ(ssh_add_hostkey(client, public), 0);
+        TEST_DONE();
+
+        TEST_START("kex");
+        run_kex(client, server);
+        TEST_DONE();
+
+        TEST_START("rekeying client");
+        ASSERT_INT_EQ(kex_send_kexinit(client), 0);
+        run_kex(client, server);
+        TEST_DONE();
+
+        TEST_START("rekeying server");
+        ASSERT_INT_EQ(kex_send_kexinit(server), 0);
+        run_kex(client, server);
+        TEST_DONE();
+
+        TEST_START("ssh_packet_get_state");
+        state = sshbuf_new();
+        ASSERT_PTR_NE(state, NULL);
+        ASSERT_INT_EQ(ssh_packet_get_state(server, state), 0);
+        ASSERT_INT_GE(sshbuf_len(state), 1);
+        TEST_DONE();
+
+        TEST_START("ssh_packet_set_state");
+        server2 = NULL;
+        ASSERT_INT_EQ(ssh_init(&server2, 1, NULL), 0);
+        ASSERT_PTR_NE(server2, NULL);
+        ASSERT_INT_EQ(ssh_add_hostkey(server2, private), 0);
+        kex_free(server2->kex); /* XXX or should ssh_packet_set_state()? */
+        ASSERT_INT_EQ(ssh_packet_set_state(server2, state), 0);
+        ASSERT_INT_EQ(sshbuf_len(state), 0);
+        sshbuf_free(state);
+        ASSERT_PTR_NE(server2->kex, NULL);
+        /* XXX we need to set the callbacks */
+        server2->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server;
+        server2->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server;
+        server2->kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
+        server2->kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
+#ifdef OPENSSL_HAS_ECC
+        server2->kex->kex[KEX_ECDH_SHA2] = kexecdh_server;
+#endif
+        server2->kex->kex[KEX_C25519_SHA256] = kexc25519_server;
+        server2->kex->load_host_public_key = server->kex->load_host_public_key;
+        server2->kex->load_host_private_key = server->kex->load_host_private_key;
+        server2->kex->sign = server->kex->sign;
+        TEST_DONE();
+
+        TEST_START("rekeying server2");
+        ASSERT_INT_EQ(kex_send_kexinit(server2), 0);
+        run_kex(client, server2);
+        ASSERT_INT_EQ(kex_send_kexinit(client), 0);
+        run_kex(client, server2);
+        TEST_DONE();
+
+        TEST_START("cleanup");
+        sshkey_free(private);
+        sshkey_free(public);
+        ssh_free(client);
+        ssh_free(server);
+        ssh_free(server2);
+        TEST_DONE();
+}
+
+static void
+do_kex(char *kex)
+{
+        do_kex_with_key(kex, KEY_RSA, 2048);
+        do_kex_with_key(kex, KEY_DSA, 1024);
+#ifdef OPENSSL_HAS_ECC
+        do_kex_with_key(kex, KEY_ECDSA, 256);
+#endif
+        do_kex_with_key(kex, KEY_ED25519, 256);
+}
+
+void
+kex_tests(void)
+{
+        do_kex("curve25519-sha256@libssh.org");
+#ifdef OPENSSL_HAS_ECC
+        do_kex("ecdh-sha2-nistp256");
+        do_kex("ecdh-sha2-nistp384");
+        do_kex("ecdh-sha2-nistp521");
+#endif
+        do_kex("diffie-hellman-group-exchange-sha256");
+        do_kex("diffie-hellman-group-exchange-sha1");
+        do_kex("diffie-hellman-group14-sha1");
+        do_kex("diffie-hellman-group1-sha1");
+}
diff --git a/regress/unittests/kex/tests.c b/regress/unittests/kex/tests.c
new file mode 100644
index 000000000..e7036ec17
--- /dev/null
+++ b/regress/unittests/kex/tests.c
@@ -0,0 +1,14 @@
+/*      $OpenBSD: tests.c,v 1.1 2015/01/15 23:41:29 markus Exp $ */
+/*
+ * Placed in the public domain
+ */
+
+#include "../test_helper/test_helper.h"
+
+void kex_tests(void);
+
+void
+tests(void)
+{
+        kex_tests();
+}