53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Copyright 2025 Google LLC */
|
|
|
|
#include <test_progs.h>
|
|
#include "bpf/libbpf_internal.h"
|
|
|
|
#define MAX_LEN 4096
|
|
|
|
/* Test libbpf_sha256() for all lengths from 0 to MAX_LEN inclusively. */
|
|
void test_sha256(void)
|
|
{
|
|
/*
|
|
* The correctness of this value was verified by running this test with
|
|
* libbpf_sha256() replaced by OpenSSL's SHA256().
|
|
*/
|
|
static const __u8 expected_digest_of_digests[SHA256_DIGEST_LENGTH] = {
|
|
0x62, 0x30, 0x0e, 0x1d, 0xea, 0x7f, 0xc4, 0x74,
|
|
0xfd, 0x8e, 0x64, 0x0b, 0xd8, 0x5f, 0xea, 0x04,
|
|
0xf3, 0xef, 0x77, 0x42, 0xc2, 0x01, 0xb8, 0x90,
|
|
0x6e, 0x19, 0x91, 0x1b, 0xca, 0xb3, 0x28, 0x42,
|
|
};
|
|
__u64 seed = 0;
|
|
__u8 *data = NULL, *digests = NULL;
|
|
__u8 digest_of_digests[SHA256_DIGEST_LENGTH];
|
|
size_t i;
|
|
|
|
data = malloc(MAX_LEN);
|
|
if (!ASSERT_OK_PTR(data, "malloc"))
|
|
goto out;
|
|
digests = malloc((MAX_LEN + 1) * SHA256_DIGEST_LENGTH);
|
|
if (!ASSERT_OK_PTR(digests, "malloc"))
|
|
goto out;
|
|
|
|
/* Generate MAX_LEN bytes of "random" data deterministically. */
|
|
for (i = 0; i < MAX_LEN; i++) {
|
|
seed = (seed * 25214903917 + 11) & ((1ULL << 48) - 1);
|
|
data[i] = (__u8)(seed >> 16);
|
|
}
|
|
|
|
/* Calculate a digest for each length 0 through MAX_LEN inclusively. */
|
|
for (i = 0; i <= MAX_LEN; i++)
|
|
libbpf_sha256(data, i, &digests[i * SHA256_DIGEST_LENGTH]);
|
|
|
|
/* Calculate and verify the digest of all the digests. */
|
|
libbpf_sha256(digests, (MAX_LEN + 1) * SHA256_DIGEST_LENGTH,
|
|
digest_of_digests);
|
|
ASSERT_MEMEQ(digest_of_digests, expected_digest_of_digests,
|
|
SHA256_DIGEST_LENGTH, "digest_of_digests");
|
|
out:
|
|
free(data);
|
|
free(digests);
|
|
}
|