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Igor Opaniuk
75ac9bcb20
Without any verification on the host side, a dry-run with pre-built VIP tables (-n -D <path>) would silently succeed even when the digest tables did not match the data being flashed. The only way to catch a mismatch was to attempt a real flash and wait for the device to reject it, which wastes time and risks leaving a device in a broken state. Add hash validation to the simulator so mismatches are caught at dry-run time, before any hardware is involved. The signed initial table (DigestsToSign.bin.mbn) and all chained tables (ChainedTableOfDigests<n>.bin) are parsed as they arrive. Chain hashes linking each table to the next are verified to ensure table integrity. Per-chunk SHA256 hashes are checked in order against every XML command write and raw payload write; any mismatch is reported via ux_err() without aborting so all mismatches remain visible at the end of a run. Validation is active in exactly the intended modes: -n plain dry-run, no tables sent -- no-op -n -D <path> dry-run with VIP tables -- full hash validation -n -t <dir> digest generation -- validation disabled MAX_DIGESTS_PER_SIGNED_FILE and MAX_DIGESTS_PER_CHAINED_FILE are moved from vip.c to vip.h so sim.c can reference them. sha2.c is added to RAMDUMP_SRCS because qdl-ramdump links sim.o which now calls SHA256. Signed-off-by: Igor Opaniuk <igor.opaniuk@oss.qualcomm.com>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* Copyright (c) 2025, Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#ifndef __VIP_H__
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#define __VIP_H__
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#include "sha2.h"
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struct vip_table_generator;
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/*
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* Capacity of each VIP digest table file.
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*
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* Each table holds at most FILE entries: the last slot is reserved for a
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* chain hash linking to the next table. The TABLE constant is therefore
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* FILE - 1 and represents the number of actual data-chunk hashes per table.
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*/
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#define MAX_DIGESTS_PER_SIGNED_FILE 54
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#define MAX_DIGESTS_PER_CHAINED_FILE 256
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enum vip_state {
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VIP_DISABLED,
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VIP_INIT,
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VIP_SEND_NEXT_TABLE,
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VIP_SEND_DATA,
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VIP_MAX,
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};
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#define MAX_CHAINED_FILES 32
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struct vip_transfer_data {
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enum vip_state state;
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int signed_table_fd;
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int chained_fds[MAX_CHAINED_FILES];
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size_t chained_num;
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size_t chained_cur;
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size_t digests;
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size_t frames_sent;
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size_t frames_left;
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size_t chained_table_size;
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bool fh_parse_status;
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bool sending_table; /* set during vip_transfer_send_raw() */
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};
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int vip_transfer_init(struct qdl_device *qdl, const char *vip_table_path);
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void vip_transfer_deinit(struct qdl_device *qdl);
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int vip_transfer_handle_tables(struct qdl_device *qdl);
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bool vip_transfer_status_check_needed(struct qdl_device *qdl);
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void vip_transfer_clear_status(struct qdl_device *qdl);
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int vip_gen_init(struct qdl_device *qdl, const char *path);
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void vip_gen_chunk_init(struct qdl_device *qdl);
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void vip_gen_chunk_update(struct qdl_device *qdl, const void *buf, size_t len);
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void vip_gen_chunk_store(struct qdl_device *qdl);
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void vip_gen_finalize(struct qdl_device *qdl);
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#endif /* __VIP_H__ */
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