afc571b1a6
The vectx API, computes the hash for verifying a file as it is read. This avoids the overhead of reading files twice - once to verify, then again to load. For doing an install via loader, avoiding the need to rewind large files is critical. This API is only used for modules, kernel and mdimage as these are the biggest files read by the loader. The reduction in boot time depends on how expensive the I/O is on any given platform. On a fast VM we see 6% improvement. For install via loader the first file to be verified is likely to be the kernel, so some of the prep work (finding manifest etc) done by verify_file() needs to be factored so it can be reused for vectx_open(). For missing or unrecognized fingerprint entries, we fail in vectx_open() unless verifying is disabled. Otherwise fingerprint check happens in vectx_close() and since this API is only used for files which must be verified (VE_MUST) we panic if we get an incorrect hash. Reviewed by: imp,tsoome MFC after: 1 week Sponsored by: Juniper Networks Differential Revision: https://reviews.freebsd.org//D23827
60 lines
2.6 KiB
C
60 lines
2.6 KiB
C
/*-
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* Copyright (c) 2017-2018, Juniper Networks, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VERIFY_FILE_H_
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#define _VERIFY_FILE_H_
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#define VE_GUESS -1 /* let verify_file work it out */
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#define VE_TRY 0 /* we don't mind if unverified */
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#define VE_WANT 1 /* we want this verified */
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#define VE_MUST 2 /* this must be verified */
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#define VE_NOT_CHECKED -42
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#define VE_VERIFIED 1 /* all good */
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#define VE_UNVERIFIED_OK 0 /* not verified but that's ok */
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#define VE_NOT_VERIFYING 2 /* we are not verifying */
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struct stat;
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int verify_prep(int, const char *, off_t, struct stat *, const char *);
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void ve_debug_set(int);
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char *ve_error_get(void);
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void ve_efi_init(void);
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int ve_status_get(int);
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int load_manifest(const char *, const char *, const char *, struct stat *);
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int pass_manifest(const char *, const char *);
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int pass_manifest_export_envs(void);
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int verify_file(int, const char *, off_t, int, const char *);
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void verify_pcr_export(void);
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struct vectx;
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struct vectx* vectx_open(int, const char *, off_t, struct stat *, int *, const char *);
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ssize_t vectx_read(struct vectx *, void *, size_t);
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off_t vectx_lseek(struct vectx *, off_t, int);
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int vectx_close(struct vectx *, int, const char *);
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#endif /* _VERIFY_FILE_H_ */
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