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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 <string.h>
#include "s2n_test.h"
#include "stuffer/s2n_stuffer.h"
#include "utils/s2n_blob.h"
#include "utils/s2n_random.h"
int main(int argc, char **argv)
{
char c;
uint32_t skipped = 0;
struct s2n_stuffer stuffer, token;
struct s2n_blob pad_blob, token_blob;
char text[] = " This is some text\r\n\tmore text";
char fields[] = "one,two,three";
uint8_t pad[1024];
char out[1024];
char tokenpad[6];
BEGIN_TEST();
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
/* Check whitespace reading */
{
/* Create a stuffer */
EXPECT_SUCCESS(s2n_blob_init(&token_blob, (uint8_t *) tokenpad, sizeof(tokenpad)));
EXPECT_SUCCESS(s2n_stuffer_init(&token, &token_blob));
EXPECT_SUCCESS(s2n_blob_init(&pad_blob, (uint8_t *) pad, sizeof(pad)));
EXPECT_SUCCESS(s2n_stuffer_init(&stuffer, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_write_text(&stuffer, text, sizeof(text)));
/* Skip 4 bytes of whitespace */
EXPECT_SUCCESS(s2n_stuffer_skip_whitespace(&stuffer, &skipped));
EXPECT_EQUAL(skipped, 4);
EXPECT_SUCCESS(s2n_stuffer_peek_char(&stuffer, &c));
EXPECT_EQUAL(c, 'T');
/* Read the next 17 chars */
EXPECT_SUCCESS(s2n_stuffer_read_text(&stuffer, out, 17));
EXPECT_EQUAL(memcmp(out, "This is some text", 17), 0);
/* Skip 3 bytes of whitespace */
EXPECT_SUCCESS(s2n_stuffer_skip_whitespace(&stuffer, &skipped));
EXPECT_EQUAL(skipped, 3);
/* Read the next 10 chars (including the terminating zero) */
EXPECT_SUCCESS(s2n_stuffer_read_text(&stuffer, out, 10));
EXPECT_EQUAL(memcmp(out, "more text", 10), 0);
/* Test end of stream behaviour */
EXPECT_SUCCESS(s2n_stuffer_skip_whitespace(&stuffer, NULL));
EXPECT_FAILURE(s2n_stuffer_peek_char(&stuffer, &c));
EXPECT_FAILURE(s2n_stuffer_read_char(&stuffer, &c));
};
/* Check read_until, rewinding, and expecting */
{
/* Create a stuffer */
EXPECT_SUCCESS(s2n_blob_init(&token_blob, (uint8_t *) tokenpad, sizeof(tokenpad)));
EXPECT_SUCCESS(s2n_stuffer_init(&token, &token_blob));
EXPECT_SUCCESS(s2n_blob_init(&pad_blob, (uint8_t *) pad, sizeof(pad)));
EXPECT_SUCCESS(s2n_stuffer_init(&stuffer, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_write_text(&stuffer, text, sizeof(text)));
char target[] = "text";
char non_target[] = "someStringNotInStuffer";
EXPECT_SUCCESS(s2n_stuffer_skip_read_until(&stuffer, target));
EXPECT_EQUAL(stuffer.read_cursor, 21);
EXPECT_SUCCESS(s2n_stuffer_rewind_read(&stuffer, strlen(target)));
EXPECT_EQUAL(stuffer.read_cursor, 17);
EXPECT_SUCCESS(s2n_stuffer_read_expected_str(&stuffer, target));
EXPECT_EQUAL(stuffer.read_cursor, 21);
EXPECT_SUCCESS(s2n_stuffer_skip_read_until(&stuffer, target));
EXPECT_EQUAL(stuffer.read_cursor, 33);
EXPECT_FAILURE(s2n_stuffer_rewind_read(&stuffer, 99));
EXPECT_SUCCESS(s2n_stuffer_reread(&stuffer));
EXPECT_SUCCESS(s2n_stuffer_skip_read_until(&stuffer, non_target));
EXPECT_EQUAL(stuffer.read_cursor, stuffer.write_cursor - strlen(non_target) + 1);
};
/* Check token reading */
{
/* Start a new buffer */
EXPECT_SUCCESS(s2n_stuffer_init(&stuffer, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_write_text(&stuffer, fields, strlen(fields)));
EXPECT_SUCCESS(s2n_stuffer_read_token(&stuffer, &token, ','));
EXPECT_EQUAL(memcmp("one", token.blob.data, 3), 0);
EXPECT_SUCCESS(s2n_stuffer_init(&token, &token_blob));
EXPECT_SUCCESS(s2n_stuffer_read_token(&stuffer, &token, ','));
EXPECT_EQUAL(memcmp("two", token.blob.data, 3), 0);
/* Check for end-of-stream termination */
EXPECT_SUCCESS(s2n_stuffer_init(&token, &token_blob));
EXPECT_SUCCESS(s2n_stuffer_read_token(&stuffer, &token, ','));
EXPECT_EQUAL(memcmp("three", token.blob.data, 5), 0);
};
/* Check line reading */
{
struct s2n_blob line_blob = { 0 };
struct s2n_stuffer lstuffer = { 0 };
char lf_line[] = "a LF terminated line\n";
char crlf_line[] = "a CRLF terminated line\r\n";
char lf_line_trailing_cr[] = "a LF terminated line with trailing CR\n\r\r\r\r\r\r";
char not_a_line[] = "not a line";
EXPECT_SUCCESS(s2n_blob_init(&line_blob, (uint8_t *) lf_line, sizeof(lf_line)));
EXPECT_SUCCESS(s2n_stuffer_init(&lstuffer, &line_blob));
EXPECT_SUCCESS(s2n_stuffer_write(&lstuffer, &line_blob));
memset(pad, 0, sizeof(pad));
EXPECT_SUCCESS(s2n_blob_init(&pad_blob, pad, sizeof(pad)));
EXPECT_SUCCESS(s2n_stuffer_init(&token, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_read_line(&lstuffer, &token));
EXPECT_EQUAL(strlen("a LF terminated line"), s2n_stuffer_data_available(&token));
EXPECT_SUCCESS(memcmp("a LF terminated line", token.blob.data, s2n_stuffer_data_available(&token)));
EXPECT_SUCCESS(s2n_blob_init(&line_blob, (uint8_t *) crlf_line, sizeof(crlf_line)));
EXPECT_SUCCESS(s2n_stuffer_init(&lstuffer, &line_blob));
EXPECT_SUCCESS(s2n_stuffer_write(&lstuffer, &line_blob));
memset(pad, 0, sizeof(pad));
EXPECT_SUCCESS(s2n_blob_init(&pad_blob, pad, sizeof(pad)));
EXPECT_SUCCESS(s2n_stuffer_init(&token, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_read_line(&lstuffer, &token));
EXPECT_EQUAL(strlen("a CRLF terminated line"), s2n_stuffer_data_available(&token));
EXPECT_SUCCESS(memcmp("a CRLF terminated line", token.blob.data, s2n_stuffer_data_available(&token)));
EXPECT_SUCCESS(s2n_blob_init(&line_blob, (uint8_t *) lf_line_trailing_cr, sizeof(lf_line_trailing_cr)));
EXPECT_SUCCESS(s2n_stuffer_init(&lstuffer, &line_blob));
EXPECT_SUCCESS(s2n_stuffer_write(&lstuffer, &line_blob));
memset(pad, 0, sizeof(pad));
EXPECT_SUCCESS(s2n_blob_init(&pad_blob, pad, sizeof(pad)));
EXPECT_SUCCESS(s2n_stuffer_init(&token, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_read_line(&lstuffer, &token));
EXPECT_EQUAL(strlen("a LF terminated line with trailing CR"), s2n_stuffer_data_available(&token));
EXPECT_SUCCESS(memcmp("a LF terminated line with trailing CR", token.blob.data, s2n_stuffer_data_available(&token)));
EXPECT_SUCCESS(s2n_blob_init(&line_blob, (uint8_t *) not_a_line, sizeof(not_a_line)));
EXPECT_SUCCESS(s2n_stuffer_init(&lstuffer, &line_blob));
EXPECT_SUCCESS(s2n_stuffer_write(&lstuffer, &line_blob));
memset(pad, 0, sizeof(pad));
EXPECT_SUCCESS(s2n_blob_init(&pad_blob, pad, sizeof(pad)));
EXPECT_SUCCESS(s2n_stuffer_init(&token, &pad_blob));
EXPECT_SUCCESS(s2n_stuffer_read_line(&lstuffer, &token));
EXPECT_EQUAL(sizeof(not_a_line), s2n_stuffer_data_available(&token));
EXPECT_SUCCESS(memcmp("not a line", token.blob.data, s2n_stuffer_data_available(&token)));
};
/* Test s2n_stuffer_printf */
{
const char *format_str = "str (%s) and int (%i)";
const char *str_arg = "hello";
const int int_arg = 5;
const char *expected_str = "str (hello) and int (5)";
const size_t expected_len = strlen(expected_str);
const size_t mem_size = expected_len + 1;
/* Sanity check: Verify expected_str matches snprintf output */
{
char result_str[100] = { 0 };
int result_len = snprintf(result_str, sizeof(result_str),
format_str, str_arg, int_arg);
EXPECT_TRUE(result_len < sizeof(result_str));
EXPECT_EQUAL(result_len, expected_len);
EXPECT_BYTEARRAY_EQUAL(expected_str, result_str, result_len);
}
/* Test: Print formatted message */
{
DEFER_CLEANUP(struct s2n_stuffer test = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&test, mem_size));
EXPECT_SUCCESS(s2n_stuffer_printf(&test, format_str, str_arg, int_arg));
EXPECT_EQUAL(s2n_stuffer_data_available(&test), expected_len);
uint8_t *actual_bytes = s2n_stuffer_raw_read(&test, expected_len);
EXPECT_NOT_NULL(actual_bytes);
EXPECT_BYTEARRAY_EQUAL(actual_bytes, expected_str, expected_len);
};
/* Test: Print formatted message with no arguments */
{
const char no_args_str[] = "hello world";
const size_t no_args_str_len = strlen(no_args_str);
DEFER_CLEANUP(struct s2n_stuffer test = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&test, sizeof(no_args_str)));
EXPECT_SUCCESS(s2n_stuffer_printf(&test, no_args_str));
EXPECT_EQUAL(s2n_stuffer_data_available(&test), no_args_str_len);
uint8_t *actual_bytes = s2n_stuffer_raw_read(&test, no_args_str_len);
EXPECT_NOT_NULL(actual_bytes);
EXPECT_BYTEARRAY_EQUAL(actual_bytes, no_args_str, no_args_str_len);
};
/* Test: Message too large for fixed size stuffer */
{
DEFER_CLEANUP(struct s2n_stuffer test = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&test, mem_size - 1));
EXPECT_FAILURE_WITH_ERRNO(
s2n_stuffer_printf(&test, format_str, str_arg, int_arg),
S2N_ERR_STUFFER_IS_FULL);
};
/* Test: Message too large for growable stuffer */
{
DEFER_CLEANUP(struct s2n_stuffer test = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&test, 0));
EXPECT_EQUAL(test.blob.allocated, 0);
EXPECT_SUCCESS(s2n_stuffer_printf(&test, format_str, str_arg, int_arg));
EXPECT_EQUAL(s2n_stuffer_data_available(&test), expected_len);
uint8_t *actual_bytes = s2n_stuffer_raw_read(&test, expected_len);
EXPECT_NOT_NULL(actual_bytes);
EXPECT_BYTEARRAY_EQUAL(actual_bytes, expected_str, expected_len);
EXPECT_TRUE(test.blob.allocated > 0);
};
/* Test: Multiple writes */
{
const char full_str[] = "hello world";
const size_t full_str_size = strlen(full_str);
DEFER_CLEANUP(struct s2n_stuffer test = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&test, mem_size));
EXPECT_SUCCESS(s2n_stuffer_printf(&test, "hel"));
EXPECT_SUCCESS(s2n_stuffer_printf(&test, "%s", "lo"));
EXPECT_SUCCESS(s2n_stuffer_printf(&test, "%cworl%c", ' ', 'd'));
EXPECT_EQUAL(s2n_stuffer_data_available(&test), full_str_size);
uint8_t *actual_bytes = s2n_stuffer_raw_read(&test, full_str_size);
EXPECT_NOT_NULL(actual_bytes);
EXPECT_BYTEARRAY_EQUAL(actual_bytes, full_str, full_str_size);
};
/* Stuffer tracking of 'tainted' unaffected */
{
DEFER_CLEANUP(struct s2n_stuffer test = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&test, 100));
EXPECT_FALSE(test.tainted);
EXPECT_SUCCESS(s2n_stuffer_printf(&test, "hello"));
EXPECT_FALSE(test.tainted);
uint8_t *actual_bytes = s2n_stuffer_raw_read(&test, 1);
EXPECT_NOT_NULL(actual_bytes);
EXPECT_TRUE(test.tainted);
EXPECT_SUCCESS(s2n_stuffer_printf(&test, "hello"));
EXPECT_TRUE(test.tainted);
};
};
END_TEST();
return 0;
}
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