2db9143a1b
To meet FIPS 140 requirements, add support for building a kernel module
"fips140.ko" that contains various cryptographic algorithms built from
existing kernel source files. At load time, the module checks its own
integrity and self-tests its algorithms, then registers the algorithms
with the crypto API to supersede the original algorithms provided by the
kernel itself.
[ebiggers: this commit originated from "ANDROID: crypto: fips140 -
perform load time integrity check", but I've folded many later commits
into it to make forward porting easier. See below]
Original commits from android12-5.10:
* 6be141eb36fe ("ANDROID: crypto: fips140 - perform load time integrity check")
* 868be244bbed ("ANDROID: inject correct HMAC digest into fips140.ko at build time")
* 091338cb398e ("ANDROID: fips140: add missing static keyword to fips140_init()")
* c799c6644b52 ("ANDROID: fips140: adjust some log messages")
* 92de53472e68 ("ANDROID: fips140: log already-live algorithms")
* 0af06624eadc ("ANDROID: fips140: check for errors from initcalls")
* 634445a640a4 ("ANDROID: fips140: fix deadlock in unregister_existing_fips140_algos()")
* e886dd4c339e ("ANDROID: fips140: unregister existing DRBG algorithms")
* b7397e89db29 ("ANDROID: fips140: add power-up cryptographic self-tests")
* 50661975be74 ("ANDROID: fips140: add/update module help text")
* b397a0387cb2 ("ANDROID: fips140: test all implementations")
* 17ccefe14021 ("ANDROID: fips140: use full 16-byte IV")
* 1be58af0776a ("ANDROID: fips140: remove non-prediction-resistant DRBG test")
* 2b5843ae2d90 ("ANDROID: fips140: add AES-CBC-CTS")
* 2ee56aad318c ("ANDROID: fips140: add AES-CMAC")
* 960ebb2b565b ("ANDROID: fips140: add jitterentropy to fips140 module")
* e5b14396f9d2 ("ANDROID: fips140: take into account AES-GCM not being approvable")
* 52b70d491bd4 ("ANDROID: fips140: use FIPS140_CFLAGS when compiling fips140-selftests.c")
* 6b995f5a5403 ("ANDROID: fips140: preserve RELA sections without relying on the module loader")
* e45108ecff64 ("ANDROID: fips140: block crypto operations until tests complete")
* ecf9341134d1 ("ANDROID: fips140: remove in-place updating of live algorithms")
* 482b0323cf29 ("ANDROID: fips140: zeroize temporary values from integrity check")
* 64d769e53f20 ("ANDROID: fips140: add service indicators")
* 8d7f609cdaa4 ("ANDROID: fips140: add name and version, and a function to retrieve them")
* 6b7c37f6c449 ("ANDROID: fips140: use UTS_RELEASE as FIPS version")
* 903e97a0ca6d ("ANDROID: fips140: refactor evaluation testing support")
* 97fb2104fe22 ("ANDROID: fips140: add support for injecting integrity error")
* 109f31ac23f5 ("ANDROID: fips140: add userspace interface for evaluation testing")
Bug: 153614920
Bug: 188620248
Test: tested that the module builds and can be loaded on raven.
Change-Id: I3fde49dbc3d16b149b072a27ba5b4c6219015c94
Signed-off-by: Ard Biesheuvel <ardb@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
49 lines
1.4 KiB
Makefile
49 lines
1.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# This file is included by the generic Kbuild makefile to permit the
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# architecture to perform postlink actions on vmlinux and any .ko module file.
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# In this case, we only need it for fips140.ko, which needs some postprocessing
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# for the integrity check mandated by FIPS. This involves making copies of the
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# relocation sections so that the module will have access to them at
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# initialization time, and calculating and injecting a HMAC digest into the
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# module. All other targets are NOPs.
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#
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PHONY := __archpost
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__archpost:
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-include include/config/auto.conf
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include scripts/Kbuild.include
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CMD_FIPS140_GEN_HMAC = crypto/fips140_gen_hmac
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quiet_cmd_gen_hmac = HMAC $@
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cmd_gen_hmac = $(OBJCOPY) $@ \
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--dump-section=$(shell $(READELF) -SW $@|grep -Eo '\.rela\.text\S*')=$@.rela.text \
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--dump-section=$(shell $(READELF) -SW $@|grep -Eo '\.rela\.rodata\S*')=$@.rela.rodata \
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--add-section=.init.rela.text=$@.rela.text \
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--add-section=.init.rela.rodata=$@.rela.rodata \
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--set-section-flags=.init.rela.text=alloc,readonly \
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--set-section-flags=.init.rela.rodata=alloc,readonly && \
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$(CMD_FIPS140_GEN_HMAC) $@
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# `@true` prevents complaints when there is nothing to be done
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vmlinux: FORCE
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@true
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$(objtree)/crypto/fips140.ko: FORCE
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$(call cmd,gen_hmac)
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%.ko: FORCE
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@true
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clean:
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rm -f $(objtree)/crypto/fips140.ko.rela.*
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PHONY += FORCE clean
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FORCE:
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.PHONY: $(PHONY)
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