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/*
* Copyright 2021-present MongoDB, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "test_kms_assert.h"
#include "test_kms_util.h"
#include "kms_message/kms_kmip_response_parser.h"
#include "kms_kmip_response_parser_private.h"
/* The following sample data come from section 9.1.2 of
* http://docs.oasis-open.org/kmip/spec/v1.4/os/kmip-spec-v1.4-os.html. The
* data describes "A Structure containing an Enumeration, value 254, followed
* by an Integer, value 255, having tags 420004 and 420005 respectively." */
static const char *const SAMPLE_KMIP =
"42 00 20 | 01 | 00 00 00 20 | 42 00 04 | 05 | 00 00 00 04 | 00 00 00 FE 00 "
"00 00 00 | 42 00 05 | 02 | 00 00 00 04 | 00 00 00 FF 00 00 00 00";
/* SAMPLE_KMIP_FIRST_LENGTH is the length of message after the first tag, type,
* and length. */
static const int SAMPLE_KMIP_FIRST_LENGTH = 32;
/* SAMPLE_KMIP_LARGE_LENGTH is a byte size larger than the message. */
static const int SAMPLE_KMIP_LARGE_LENGTH = 1024;
void kms_kmip_response_parser_test (void); // -Wmissing-prototypes: for testing only.
void
kms_kmip_response_parser_test (void)
{
kms_response_parser_t *parser;
uint8_t *data;
size_t outlen;
int32_t want_bytes;
kms_response_t *res;
bool ok;
data = hex_to_data (SAMPLE_KMIP, &outlen);
parser = kms_kmip_response_parser_new (NULL);
want_bytes =
kms_response_parser_wants_bytes (parser, SAMPLE_KMIP_LARGE_LENGTH);
ASSERT_CMPINT (KMS_KMIP_RESPONSE_PARSER_FIRST_LENGTH, ==, want_bytes);
/* A smaller maximum size caps the requested bytes. */
want_bytes = kms_response_parser_wants_bytes (parser, 1);
ASSERT_CMPINT (1, ==, want_bytes);
/* Feed one byte */
ok = kms_response_parser_feed (parser, data, 1);
ASSERT_PARSER_OK (parser);
ASSERT (ok);
want_bytes =
kms_response_parser_wants_bytes (parser, SAMPLE_KMIP_LARGE_LENGTH);
ASSERT_CMPINT (KMS_KMIP_RESPONSE_PARSER_FIRST_LENGTH - 1, ==, want_bytes);
/* Feed the remaining bytes. */
ok = kms_response_parser_feed (
parser, data + 1, KMS_KMIP_RESPONSE_PARSER_FIRST_LENGTH - 1);
ASSERT_PARSER_OK (parser);
ASSERT (ok);
/* The parser knows first length. Expect the parser wants the remaining
* length. */
want_bytes =
kms_response_parser_wants_bytes (parser, SAMPLE_KMIP_LARGE_LENGTH);
ASSERT_CMPINT (want_bytes, ==, SAMPLE_KMIP_FIRST_LENGTH);
ok = kms_response_parser_feed (parser,
data + KMS_KMIP_RESPONSE_PARSER_FIRST_LENGTH,
SAMPLE_KMIP_FIRST_LENGTH);
ASSERT_PARSER_OK (parser);
ASSERT (ok);
/* Parser has full message. */
want_bytes =
kms_response_parser_wants_bytes (parser, SAMPLE_KMIP_LARGE_LENGTH);
ASSERT_CMPINT (want_bytes, ==, 0);
res = kms_response_parser_get_response (parser);
ASSERT_PARSER_OK (parser);
ASSERT (res);
kms_response_destroy (res);
kms_response_parser_destroy (parser);
free (data);
}
static void
feed_full_response (kms_response_parser_t *parser, uint8_t *data)
{
uint32_t i = 0;
int32_t want_bytes;
bool ok;
want_bytes =
kms_response_parser_wants_bytes (parser, SAMPLE_KMIP_LARGE_LENGTH);
ASSERT_CMPINT (KMS_KMIP_RESPONSE_PARSER_FIRST_LENGTH, ==, want_bytes);
while (want_bytes > 0) {
ok = kms_response_parser_feed (parser, data + i, want_bytes);
ASSERT_PARSER_OK (parser);
ASSERT (ok);
i += want_bytes;
want_bytes =
kms_response_parser_wants_bytes (parser, SAMPLE_KMIP_LARGE_LENGTH);
}
}
void kms_kmip_response_parser_reuse_test (void); // -Wmissing-prototypes: for testing only.
void
kms_kmip_response_parser_reuse_test (void)
{
kms_response_parser_t *parser;
uint8_t *data;
size_t outlen;
kms_response_t *res;
data = hex_to_data (SAMPLE_KMIP, &outlen);
parser = kms_kmip_response_parser_new (NULL);
feed_full_response (parser, data);
ASSERT_PARSER_OK (parser);
res = kms_response_parser_get_response (parser);
ASSERT_PARSER_OK (parser);
ASSERT (res);
kms_response_destroy (res);
/* Feed another full response. */
feed_full_response (parser, data);
ASSERT_PARSER_OK (parser);
res = kms_response_parser_get_response (parser);
ASSERT_PARSER_OK (parser);
ASSERT (res);
kms_response_destroy (res);
kms_response_parser_destroy (parser);
free (data);
}
void kms_kmip_response_parser_excess_test (void); // -Wmissing-prototypes: for testing only.
void
kms_kmip_response_parser_excess_test (void)
{
kms_response_parser_t *parser;
uint8_t *data;
size_t outlen;
bool ok;
data = hex_to_data (SAMPLE_KMIP, &outlen);
parser = kms_kmip_response_parser_new (NULL);
feed_full_response (parser, data);
ASSERT_PARSER_OK (parser);
ok = kms_response_parser_feed (parser, data, 1);
ASSERT_PARSER_ERROR (parser, "KMIP parser was fed too much data");
ASSERT (!ok);
kms_response_parser_destroy (parser);
free (data);
}
void kms_kmip_response_parser_notenough_test (void); // -Wmissing-prototypes: for testing only.
void
kms_kmip_response_parser_notenough_test (void)
{
kms_response_parser_t *parser;
uint8_t *data;
size_t outlen;
kms_response_t *res;
bool ok;
data = hex_to_data (SAMPLE_KMIP, &outlen);
parser = kms_kmip_response_parser_new (NULL);
ok = kms_response_parser_feed (
parser, data, KMS_KMIP_RESPONSE_PARSER_FIRST_LENGTH);
ASSERT_PARSER_OK (parser);
ASSERT (ok);
res = kms_response_parser_get_response (parser);
ASSERT_PARSER_ERROR (parser, "KMIP parser does not have a complete message");
ASSERT (!res);
kms_response_parser_destroy (parser);
free (data);
}
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