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96 lines
2.5 KiB
96 lines
2.5 KiB
4 months ago
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/* SPDX-License-Identifier: MIT */
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/*
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* Private header for libfsverity
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*
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* Copyright 2020 Google LLC
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*
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* Use of this source code is governed by an MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT.
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*/
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#ifndef LIB_LIB_PRIVATE_H
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#define LIB_LIB_PRIVATE_H
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#include "libfsverity.h"
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#include "../common/common_defs.h"
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#include "../common/fsverity_uapi.h"
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#include <stdarg.h>
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#define LIBEXPORT __attribute__((visibility("default")))
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/* The hash algorithm that libfsverity assumes when none is specified */
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#define FS_VERITY_HASH_ALG_DEFAULT FS_VERITY_HASH_ALG_SHA256
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/* The block size that libfsverity assumes when none is specified */
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#define FS_VERITY_BLOCK_SIZE_DEFAULT 4096
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/* hash_algs.c */
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struct fsverity_hash_alg {
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const char *name;
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unsigned int digest_size;
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unsigned int block_size;
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struct hash_ctx *(*create_ctx)(const struct fsverity_hash_alg *alg);
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};
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const struct fsverity_hash_alg *libfsverity_find_hash_alg_by_num(u32 alg_num);
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struct hash_ctx {
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const struct fsverity_hash_alg *alg;
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void (*init)(struct hash_ctx *ctx);
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void (*update)(struct hash_ctx *ctx, const void *data, size_t size);
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void (*final)(struct hash_ctx *ctx, u8 *out);
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void (*free)(struct hash_ctx *ctx);
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};
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void libfsverity_hash_init(struct hash_ctx *ctx);
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void libfsverity_hash_update(struct hash_ctx *ctx, const void *data,
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size_t size);
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void libfsverity_hash_final(struct hash_ctx *ctx, u8 *digest);
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void libfsverity_hash_full(struct hash_ctx *ctx, const void *data, size_t size,
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u8 *digest);
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void libfsverity_free_hash_ctx(struct hash_ctx *ctx);
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/* utils.c */
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void *libfsverity_zalloc(size_t size);
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void *libfsverity_memdup(const void *mem, size_t size);
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__cold void
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libfsverity_do_error_msg(const char *format, va_list va, int err);
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__printf(1, 2) __cold void
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libfsverity_error_msg(const char *format, ...);
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__printf(1, 2) __cold void
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libfsverity_error_msg_errno(const char *format, ...);
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__cold void
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libfsverity_warn_on(const char *condition, const char *file, int line);
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#define WARN_ON(condition) \
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({ \
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bool c = (condition); \
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\
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if (c) \
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libfsverity_warn_on(#condition, __FILE__, __LINE__); \
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c; \
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})
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__cold void
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libfsverity_bug_on(const char *condition, const char *file, int line);
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#define BUG_ON(condition) \
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({ \
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bool c = (condition); \
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\
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if (c) \
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libfsverity_bug_on(#condition, __FILE__, __LINE__); \
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c; \
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})
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bool libfsverity_mem_is_zeroed(const void *mem, size_t size);
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#endif /* LIB_LIB_PRIVATE_H */
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