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add890c9f9
Add SHA-512 support to fs-verity. This is primarily a demonstration of the trivial changes needed to support a new hash algorithm in fs-verity; most users will still use SHA-256, due to the smaller space required to store the hashes. But some users may prefer SHA-512. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com>
41 lines
946 B
C
41 lines
946 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* fs-verity user API
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*
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* These ioctls can be used on filesystems that support fs-verity. See the
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* "User API" section of Documentation/filesystems/fsverity.rst.
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*
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* Copyright 2019 Google LLC
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*/
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#ifndef _UAPI_LINUX_FSVERITY_H
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#define _UAPI_LINUX_FSVERITY_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#define FS_VERITY_HASH_ALG_SHA256 1
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#define FS_VERITY_HASH_ALG_SHA512 2
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struct fsverity_enable_arg {
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__u32 version;
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__u32 hash_algorithm;
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__u32 block_size;
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__u32 salt_size;
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__u64 salt_ptr;
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__u32 sig_size;
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__u32 __reserved1;
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__u64 sig_ptr;
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__u64 __reserved2[11];
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};
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struct fsverity_digest {
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__u16 digest_algorithm;
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__u16 digest_size; /* input/output */
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__u8 digest[];
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};
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#define FS_IOC_ENABLE_VERITY _IOW('f', 133, struct fsverity_enable_arg)
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#define FS_IOC_MEASURE_VERITY _IOWR('f', 134, struct fsverity_digest)
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#endif /* _UAPI_LINUX_FSVERITY_H */
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