Add unit test for fn that generates session keys

Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/unittests/CMakeLists.txt

@@ -19,6 +19,7 @@ set(LIBSSH_UNIT_TESTS
     torture_temp_dir
     torture_temp_file
     torture_push_pop_dir
+    torture_session_keys
 )
 
 set(LIBSSH_THREAD_UNIT_TESTS

tests/unittests/torture_session_keys.c

@@ -0,0 +1,97 @@
+#include "config.h"
+
+#define LIBSSH_STATIC
+
+#include "torture.h"
+#include "libssh/bignum.h"
+#include "libssh/crypto.h"
+#include "libssh/dh.h"
+
+uint8_t key[32] =
+    "\xf7\xa0\xe6\xdf\x1f\x87\x7d\x22\x68\xd2\xc4\xb0\xc5\x93\xa4"
+    "\x8e\x30\x17\xc6\xab\xca\xf3\x9a\xa4\x9f\x7b\xed\x51\xb1\xe8"
+    "\x8a\x42";
+uint8_t secret[32] =
+    "\x33\x64\x8e\x7f\xea\xd9\xd7\xee\x89\x4f\xd8\xd0\xe5\x83\x00"
+    "\x3d\x53\x17\xbc\xa8\x8b\x6b\x2a\x31\x50\xcc\x08\xe9\xea\x87"
+    "\xb4\x23";
+
+uint8_t eIV[32] =
+    "\x9a\x2b\x40\x9d\x29\x8e\x22\x70\x86\xdf\x0e\x72\x9b\x91\x31"
+    "\x90\x5d\x69\xc5\x87\x79\x83\x72\x63\x4e\x67\xf5\x9e\x00\x77"
+    "\x8c\x7f";
+uint8_t dIV[32] =
+    "\x10\xdd\x7f\x31\x6d\xe3\x49\x28\xbf\x99\x80\x08\x16\xb3\x99"
+    "\xff\x8c\x61\x9b\xb9\xc2\xdd\x40\xfb\x36\xf9\x97\xd8\x8c\x55"
+    "\xbf\xa0";
+uint8_t eK[24] =
+    "\xe1\x99\x36\xb8\xe6\x1f\x3d\x54\xc3\xa2\xdd\x79\xf0\xfe\x78"
+    "\x9e\x87\xd5\x05\x54\x26\x34\x21\xd0";
+uint8_t dK[24] =
+    "\xf8\xdd\xc3\xea\x5a\x59\x98\xb9\x86\xaa\x77\x29\x67\x51\x46"
+    "\x21\x73\xc2\x6a\x6b\xed\xf2\x49\x98";
+uint8_t eMAC[32] =
+    "\x0f\xbd\x1f\xe9\x2a\xaa\x84\xdc\xb5\xfc\xfb\x68\x2c\xa5\xe0"
+    "\xba\xf2\x6f\xe5\x80\xee\x8f\x5c\x5b\x30\x55\x25\xb3\x7b\x21"
+    "\xdc\xe5";
+uint8_t dMAC[32] =
+    "\xa3\x52\x6e\x72\xa8\x8b\xde\xc5\x68\x66\x89\xae\x0a\xd2\x83"
+    "\x23\x21\x4b\x3f\x04\x2e\x7f\x86\x04\x0f\xa8\x04\x3c\x62\xad"
+    "\x74\x91";
+
+struct ssh_cipher_struct fake_in_cipher = {
+    .keysize = 192
+};
+
+struct ssh_cipher_struct fake_out_cipher = {
+    .keysize = 192
+};
+
+struct ssh_crypto_struct test_crypto = {
+    .digest_len = 32,
+    .session_id = secret,
+    .secret_hash = secret,
+    .in_cipher = &fake_in_cipher,
+    .out_cipher = &fake_out_cipher,
+    .in_hmac = SSH_HMAC_SHA256,
+    .out_hmac = SSH_HMAC_SHA256,
+    .mac_type = SSH_MAC_SHA256,
+};
+
+struct ssh_session_struct session = {
+    .next_crypto = &test_crypto
+};
+
+static void torture_session_keys(UNUSED_PARAM(void **state))
+{
+    ssh_string k_string;
+    int rc;
+
+    k_string = ssh_string_new(32);
+    ssh_string_fill(k_string, key, 32);
+    test_crypto.k = ssh_make_string_bn(k_string);
+
+    rc = ssh_generate_session_keys(&session);
+    assert_int_equal(rc, 0);
+
+    assert_memory_equal(test_crypto.encryptIV, eIV, 32);
+    assert_memory_equal(test_crypto.decryptIV, dIV, 32);
+    assert_memory_equal(test_crypto.encryptkey, eK, 24);
+    assert_memory_equal(test_crypto.decryptkey, dK, 24);
+    assert_memory_equal(test_crypto.encryptMAC, eMAC, 32);
+    assert_memory_equal(test_crypto.decryptMAC, dMAC, 32);
+
+    ssh_string_free(k_string);
+}
+
+int torture_run_tests(void) {
+    int rc;
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(torture_session_keys),
+    };
+
+    ssh_init();
+    rc = cmocka_run_group_tests(tests, NULL, NULL);
+    ssh_finalize();
+    return rc;
+}