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/*
* Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/bio.h>
#include "testutil.h"
static const char *filename = NULL;
/*
* Test that a BIO_f_readbuffer() with a BIO_new_file() behaves nicely if
* BIO_gets() and BIO_read_ex() are both called.
* Since the BIO_gets() calls buffer the reads, the BIO_read_ex() should
* still be able to read the buffered data if we seek back to the start.
*
* The following cases are tested using tstid:
* 0 : Just use BIO_read_ex().
* 1 : Try a few reads using BIO_gets() before using BIO_read_ex()
* 2 : Read the entire file using BIO_gets() before using BIO_read_ex().
*/
static int test_readbuffer_file_bio(int tstid)
{
int ret = 0, len, partial;
BIO *in = NULL, *in_bio = NULL, *readbuf_bio = NULL;
char buf[255];
char expected[4096];
size_t readbytes = 0, bytes = 0, count = 0;
/* Open a file BIO and read all the data */
if (!TEST_ptr(in = BIO_new_file(filename, "r"))
|| !TEST_int_eq(BIO_read_ex(in, expected, sizeof(expected),
&readbytes), 1)
|| !TEST_int_lt(readbytes, sizeof(expected)))
goto err;
BIO_free(in);
in = NULL;
/* Create a new file bio that sits under a readbuffer BIO */
if (!TEST_ptr(readbuf_bio = BIO_new(BIO_f_readbuffer()))
|| !TEST_ptr(in_bio = BIO_new_file(filename, "r")))
goto err;
in_bio = BIO_push(readbuf_bio, in_bio);
readbuf_bio = NULL;
if (!TEST_int_eq(BIO_tell(in_bio), 0))
goto err;
if (tstid != 0) {
partial = 4;
while (!BIO_eof(in_bio)) {
len = BIO_gets(in_bio, buf, sizeof(buf));
if (len == 0) {
if (!TEST_true(BIO_eof(in_bio)))
goto err;
} else {
if (!TEST_int_gt(len, 0)
|| !TEST_int_le(len, (int)sizeof(buf) - 1))
goto err;
if (!TEST_true(buf[len] == 0))
goto err;
if (len > 1
&& !BIO_eof(in_bio)
&& len != ((int)sizeof(buf) - 1)
&& !TEST_true(buf[len - 1] == '\n'))
goto err;
}
if (tstid == 1 && --partial == 0)
break;
}
}
if (!TEST_int_eq(BIO_seek(in_bio, 0), 1))
goto err;
len = 8; /* Do a small partial read to start with */
while (!BIO_eof(in_bio)) {
if (!TEST_int_eq(BIO_read_ex(in_bio, buf, len, &bytes), 1))
break;
if (!TEST_mem_eq(buf, bytes, expected + count, bytes))
goto err;
count += bytes;
len = sizeof(buf); /* fill the buffer on subsequent reads */
}
if (!TEST_int_eq(count, readbytes))
goto err;
ret = 1;
err:
BIO_free(in);
BIO_free_all(in_bio);
BIO_free(readbuf_bio);
return ret;
}
typedef enum OPTION_choice {
OPT_ERR = -1,
OPT_EOF = 0,
OPT_TEST_ENUM
} OPTION_CHOICE;
const OPTIONS *test_get_options(void)
{
static const OPTIONS test_options[] = {
OPT_TEST_OPTIONS_WITH_EXTRA_USAGE("file\n"),
{ OPT_HELP_STR, 1, '-', "file\tFile to run tests on.\n" },
{ NULL }
};
return test_options;
}
int setup_tests(void)
{
OPTION_CHOICE o;
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_TEST_CASES:
break;
default:
return 0;
}
}
filename = test_get_argument(0);
ADD_ALL_TESTS(test_readbuffer_file_bio, 3);
return 1;
}
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