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54 lines
1.3 KiB
54 lines
1.3 KiB
// SPDX-License-Identifier: MIT
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/*
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* Implementation of libfsverity_enable() and libfsverity_enable_with_sig().
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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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#include "lib_private.h"
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#include <sys/ioctl.h>
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LIBEXPORT int
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libfsverity_enable(int fd, const struct libfsverity_merkle_tree_params *params)
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{
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return libfsverity_enable_with_sig(fd, params, NULL, 0);
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}
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LIBEXPORT int
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libfsverity_enable_with_sig(int fd,
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const struct libfsverity_merkle_tree_params *params,
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const uint8_t *sig, size_t sig_size)
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{
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struct fsverity_enable_arg arg = {};
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if (!params) {
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libfsverity_error_msg("missing required parameters for enable");
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return -EINVAL;
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}
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if (params->version != 1) {
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libfsverity_error_msg("unsupported version (%u)",
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params->version);
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return -EINVAL;
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}
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arg.version = 1;
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arg.hash_algorithm =
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params->hash_algorithm ?: FS_VERITY_HASH_ALG_DEFAULT;
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arg.block_size =
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params->block_size ?: FS_VERITY_BLOCK_SIZE_DEFAULT;
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arg.salt_size = params->salt_size;
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arg.salt_ptr = (uintptr_t)params->salt;
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arg.sig_size = sig_size;
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arg.sig_ptr = (uintptr_t)sig;
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if (ioctl(fd, FS_IOC_ENABLE_VERITY, &arg) != 0)
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return -errno;
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return 0;
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}
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