From 33a154a96e71a34a1bcca9f40da343dbbf7b38b4 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 1 Oct 2026 14:52:55 +0000 Subject: selftests/bpf: Test packet range of pointers sharing an id Add tests where two packet pointers share an id and tightening one pointer's umax from its var_off would put it less than their constant distance from the other's umax: with an index & 0x38 capped at 50, the base pointer keeps umax 50, so the pointer 8 bytes further on must keep umax 58, even though its known bits allow at most 56. These refused a valid program or accepted an out-of-bounds access before the fix: - check the advanced copy, load through the base: valid, was refused; - check the base, load the byte at base + 1 through a copy advanced by 8: was accepted; - check base + 4, load 4 bytes at base + 2 through base + 8: reads two bytes past the checked range, was accepted; - the same as the second with data_meta pointers checked against data: was accepted. These pass with and without the fix and cover nearby paths: - subtract an unknown scalar from a checked pointer and load below it (the range is kept across a new id); - reach a load through two paths whose checks cover 8 and 7 bytes after the loaded pointer; the second path must not be pruned by the first; - spill a copy of a pointer, check the pointer, fill the copy and load one byte past the checked range: the load is refused, and the copy has the range of the check. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- include/crypto/sm3.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 include/crypto/sm3.h (limited to 'include/crypto/sm3.h') diff --git a/include/crypto/sm3.h b/include/crypto/sm3.h new file mode 100644 index 000000000..371e8a661 --- /dev/null +++ b/include/crypto/sm3.h @@ -0,0 +1,87 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * SM3 hash algorithm + * + * Copyright (C) 2017 ARM Limited or its affiliates. + * Copyright (C) 2017 Gilad Ben-Yossef + * Copyright (C) 2021 Tianjia Zhang + */ + +#ifndef _CRYPTO_SM3_H +#define _CRYPTO_SM3_H + +#include + +#define SM3_DIGEST_SIZE 32 +#define SM3_BLOCK_SIZE 64 + +#define SM3_IVA 0x7380166f +#define SM3_IVB 0x4914b2b9 +#define SM3_IVC 0x172442d7 +#define SM3_IVD 0xda8a0600 +#define SM3_IVE 0xa96f30bc +#define SM3_IVF 0x163138aa +#define SM3_IVG 0xe38dee4d +#define SM3_IVH 0xb0fb0e4e + +/* State for the SM3 compression function */ +struct sm3_block_state { + u32 h[SM3_DIGEST_SIZE / 4]; +}; + +/** + * struct sm3_ctx - Context for hashing a message with SM3 + * @state: the compression function state + * @bytecount: number of bytes processed so far + * @buf: partial block buffer; bytecount % SM3_BLOCK_SIZE bytes are valid + */ +struct sm3_ctx { + struct sm3_block_state state; + u64 bytecount; + u8 buf[SM3_BLOCK_SIZE] __aligned(__alignof__(__be64)); +}; + +/** + * sm3_init() - Initialize an SM3 context for a new message + * @ctx: the context to initialize + * + * If you don't need incremental computation, consider sm3() instead. + * + * Context: Any context. + */ +void sm3_init(struct sm3_ctx *ctx); + +/** + * sm3_update() - Update an SM3 context with message data + * @ctx: the context to update; must have been initialized + * @data: the message data + * @len: the data length in bytes + * + * This can be called any number of times. + * + * Context: Any context. + */ +void sm3_update(struct sm3_ctx *ctx, const u8 *data, size_t len); + +/** + * sm3_final() - Finish computing an SM3 message digest + * @ctx: the context to finalize; must have been initialized + * @out: (output) the resulting SM3 message digest + * + * After finishing, this zeroizes @ctx. So the caller does not need to do it. + * + * Context: Any context. + */ +void sm3_final(struct sm3_ctx *ctx, u8 out[at_least SM3_DIGEST_SIZE]); + +/** + * sm3() - Compute SM3 message digest in one shot + * @data: the message data + * @len: the data length in bytes + * @out: (output) the resulting SM3 message digest + * + * Context: Any context. + */ +void sm3(const u8 *data, size_t len, u8 out[at_least SM3_DIGEST_SIZE]); + +#endif /* _CRYPTO_SM3_H */ -- cgit v1.3.1