tests: add test for cipher.(de|en)crypt

tests/unittests/CMakeLists.txt

@@ -4,6 +4,7 @@ include_directories(${OPENSSL_INCLUDE_DIR})
 
 add_cmocka_test(torture_buffer torture_buffer.c ${TORTURE_LIBRARY})
 add_cmocka_test(torture_callbacks torture_callbacks.c ${TORTURE_LIBRARY})
+add_cmocka_test(torture_crypto torture_crypto.c ${TORTURE_LIBRARY})
 add_cmocka_test(torture_init torture_init.c ${TORTURE_LIBRARY})
 add_cmocka_test(torture_list torture_list.c ${TORTURE_LIBRARY})
 add_cmocka_test(torture_misc torture_misc.c ${TORTURE_LIBRARY})

tests/unittests/torture_crypto.c

@@ -0,0 +1,107 @@
+#define LIBSSH_STATIC
+
+#include "torture.h"
+#include "libssh/crypto.h"
+
+uint8_t key[32] =
+    "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e"
+    "\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d"
+    "\x1e\x1f";
+
+uint8_t IV[16] =
+    "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e"
+    "\x1f";
+
+uint8_t cleartext[144] =
+    "\xb4\xfc\x5d\xc2\x49\x8d\x2c\x29\x4a\xc9\x9a\xb0\x1b\xf8\x29"
+    "\xee\x85\x6d\x8c\x04\x34\x7c\x65\xf4\x89\x97\xc5\x71\x70\x41"
+    "\x91\x40\x19\x60\xe1\xf1\x8f\x4d\x8c\x17\x51\xd6\xbc\x69\x6e"
+    "\xf2\x21\x87\x18\x6c\xef\xc4\xf4\xd9\xe6\x1b\x94\xf7\xd8\xb2"
+    "\xe9\x24\xb9\xe7\xe6\x19\xf5\xec\x55\x80\x9a\xc8\x7d\x70\xa3"
+    "\x50\xf8\x03\x10\x35\x49\x9b\x53\x58\xd7\x4c\xfc\x5f\x02\xd6"
+    "\x28\xea\xcc\x43\xee\x5e\x2b\x8a\x7a\x66\xf7\x00\xee\x09\x18"
+    "\x30\x1b\x47\xa2\x16\x69\xc4\x6e\x44\x3f\xbd\xec\x52\xce\xe5"
+    "\x41\xf2\xe0\x04\x4f\x5a\x55\x58\x37\xba\x45\x8d\x15\x53\xf6"
+    "\x31\x91\x13\x8c\x51\xed\x08\x07\xdb";
+
+uint8_t aes256_cbc_encrypted[144] =
+    "\x7f\x1b\x92\xac\xc5\x16\x05\x55\x74\xac\xb4\xe0\x91\x8c\xf8"
+    "\x0d\xa9\x72\xa5\x09\xb8\x44\xee\x55\x02\x13\xb7\x52\x0a\xf0"
+    "\xac\xd0\x21\x0e\x58\x7b\x34\xfe\xdb\x36\x01\x60\x7d\x18\x3a"
+    "\xa9\x15\x18\x5b\x13\xca\xdd\x77\x7d\xdf\x64\xc6\xd5\x75\x4b"
+    "\x02\x02\x37\xb1\xf4\x33\xff\x93\xe6\x32\x08\xda\xcb\x5d\xa2"
+    "\x8f\x17\x1f\x99\x92\x60\x22\x9d\x6b\xe6\xb2\x5e\xb0\x5d\x26"
+    "\x3f\xde\xb8\xc1\xb0\x70\x80\x1c\x00\xd0\x93\x2b\xeb\x0f\xd7"
+    "\x70\x7a\x9a\x7a\xa6\x21\x23\x2c\x02\xb7\xcd\x88\x10\x9c\x2d"
+    "\x0c\xd3\xfa\xc1\x33\x5b\xe1\xa1\xd4\x3d\x8f\xb8\x50\xc5\xb5"
+    "\x72\xdd\x6d\x32\x1f\x58\x00\x48\xbe";
+
+static int get_cipher(struct ssh_cipher_struct *cipher, const char *ciphername){
+    struct ssh_cipher_struct *ciphers = ssh_get_ciphertab();
+    int i, cmp;
+    for (i = 0; ciphers[i].name != NULL; i++) {
+            cmp = strcmp(ciphername, ciphers[i].name);
+            if (cmp == 0){
+                memcpy(cipher, &ciphers[i], sizeof(*cipher));
+                return SSH_OK;
+            }
+        }
+    return SSH_ERROR;
+}
+
+static void torture_crypto_aes256_cbc(void **state){
+    struct ssh_cipher_struct cipher;
+    int rc;
+    uint8_t output[sizeof(cleartext)];
+    uint8_t iv[16];
+    (void)state;
+
+    rc = get_cipher(&cipher, "aes256-cbc");
+    assert_int_equal(rc, SSH_OK);
+
+    memcpy(iv, IV, sizeof(IV));
+    cipher.set_encrypt_key(&cipher,
+            key,
+            iv
+    );
+
+    cipher.encrypt(&cipher,
+            cleartext,
+            output,
+            sizeof(cleartext)
+            );
+
+    assert_memory_equal(output, aes256_cbc_encrypted, sizeof(aes256_cbc_encrypted));
+    ssh_cipher_clear(&cipher);
+
+    rc = get_cipher(&cipher, "aes256-cbc");
+    assert_int_equal(rc, SSH_OK);
+
+    memcpy(iv, IV, sizeof(IV));
+    cipher.set_decrypt_key(&cipher,
+            key,
+            iv
+    );
+
+    cipher.decrypt(&cipher,
+            aes256_cbc_encrypted,
+            output,
+            sizeof(aes256_cbc_encrypted)
+            );
+
+    assert_memory_equal(output, cleartext, sizeof(cleartext));
+
+    ssh_cipher_clear(&cipher);
+}
+
+int torture_run_tests(void) {
+    int rc;
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(torture_crypto_aes256_cbc),
+    };
+
+    ssh_init();
+    rc = cmocka_run_group_tests(tests, NULL, NULL);
+    ssh_finalize();
+    return rc;
+}