tools/testing/selftests/bpf/prog_tests/crypto_sanity.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/crypto_sanity.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/crypto_sanity.c
Extension
.c
Size
5448 bytes
Lines
197
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */

#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <linux/if_alg.h>

#include "test_progs.h"
#include "network_helpers.h"
#include "crypto_sanity.skel.h"
#include "crypto_basic.skel.h"

#define NS_TEST "crypto_sanity_ns"
#define IPV6_IFACE_ADDR "face::1"
static const unsigned char crypto_key[] = "testtest12345678";
static const char plain_text[] = "stringtoencrypt0";
static int opfd = -1, tfmfd = -1;
static const char algo[] = "ecb(aes)";
static int init_afalg(void)
{
	struct sockaddr_alg sa = {
		.salg_family = AF_ALG,
		.salg_type = "skcipher",
		.salg_name = "ecb(aes)"
	};

	tfmfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
	if (tfmfd == -1)
		return errno;
	if (bind(tfmfd, (struct sockaddr *)&sa, sizeof(sa)) == -1)
		return errno;
	if (setsockopt(tfmfd, SOL_ALG, ALG_SET_KEY, crypto_key, 16) == -1)
		return errno;
	opfd = accept(tfmfd, NULL, 0);
	if (opfd == -1)
		return errno;
	return 0;
}

static void deinit_afalg(void)
{
	if (tfmfd != -1)
		close(tfmfd);
	if (opfd != -1)
		close(opfd);
}

static void do_crypt_afalg(const void *src, void *dst, int size, bool encrypt)
{
	struct msghdr msg = {};
	struct cmsghdr *cmsg;
	char cbuf[CMSG_SPACE(4)] = {0};
	struct iovec iov;

	msg.msg_control = cbuf;
	msg.msg_controllen = sizeof(cbuf);

	cmsg = CMSG_FIRSTHDR(&msg);
	cmsg->cmsg_level = SOL_ALG;
	cmsg->cmsg_type = ALG_SET_OP;
	cmsg->cmsg_len = CMSG_LEN(4);
	*(__u32 *)CMSG_DATA(cmsg) = encrypt ? ALG_OP_ENCRYPT : ALG_OP_DECRYPT;

	iov.iov_base = (char *)src;
	iov.iov_len = size;

	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;

	sendmsg(opfd, &msg, 0);
	read(opfd, dst, size);
}

void test_crypto_basic(void)
{
	RUN_TESTS(crypto_basic);
}

void test_crypto_sanity(void)
{
	LIBBPF_OPTS(bpf_tc_hook, qdisc_hook, .attach_point = BPF_TC_EGRESS);
	LIBBPF_OPTS(bpf_tc_opts, tc_attach_enc);
	LIBBPF_OPTS(bpf_tc_opts, tc_attach_dec);
	LIBBPF_OPTS(bpf_test_run_opts, opts);
	struct nstoken *nstoken = NULL;
	struct crypto_sanity *skel;
	char afalg_plain[16] = {0};
	char afalg_dst[16] = {0};
	struct sockaddr_in6 addr;

Annotation

Implementation Notes