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:
  android12-5.10:
    6be141eb ("ANDROID: crypto: fips140 - perform load time integrity check")
    868be244 ("ANDROID: inject correct HMAC digest into fips140.ko at build time")
    091338cb ("ANDROID: fips140: add missing static keyword to fips140_init()")
    c799c664 ("ANDROID: fips140: adjust some log messages")
    92de5347 ("ANDROID: fips140: log already-live algorithms")
    0af06624 ("ANDROID: fips140: check for errors from initcalls")
    634445a6 ("ANDROID: fips140: fix deadlock in unregister_existing_fips140_algos()")
    e886dd4c ("ANDROID: fips140: unregister existing DRBG algorithms")
    b7397e89 ("ANDROID: fips140: add power-up cryptographic self-tests")
    50661975 ("ANDROID: fips140: add/update module help text")
    b397a038 ("ANDROID: fips140: test all implementations")
    17ccefe1 ("ANDROID: fips140: use full 16-byte IV")
    1be58af0 ("ANDROID: fips140: remove non-prediction-resistant DRBG test")
    2b5843ae ("ANDROID: fips140: add AES-CBC-CTS")
    2ee56aad ("ANDROID: fips140: add AES-CMAC")
    960ebb2b ("ANDROID: fips140: add jitterentropy to fips140 module")
    e5b14396 ("ANDROID: fips140: take into account AES-GCM not being approvable")
    52b70d49 ("ANDROID: fips140: use FIPS140_CFLAGS when compiling fips140-selftests.c")
    6b995f5a ("ANDROID: fips140: preserve RELA sections without relying on the module loader")
    e45108ec ("ANDROID: fips140: block crypto operations until tests complete")
    ecf93411 ("ANDROID: fips140: remove in-place updating of live algorithms")
    482b0323 ("ANDROID: fips140: zeroize temporary values from integrity check")
    64d769e5 ("ANDROID: fips140: add service indicators")
    8d7f609c ("ANDROID: fips140: add name and version, and a function to retrieve them")
    6b7c37f6 ("ANDROID: fips140: use UTS_RELEASE as FIPS version")
    903e97a0 ("ANDROID: fips140: refactor evaluation testing support")
    97fb2104 ("ANDROID: fips140: add support for injecting integrity error")
    109f31ac ("ANDROID: fips140: add userspace interface for evaluation testing")
  android14-5.15:
    84572a0c ("ANDROID: fips140: split dump-section+add-section into 2 ops")
    b0f88738 ("ANDROID: kleaf: convert fips140 to kleaf")
    2535deae ("ANDROID: GKI: Source GKI_BUILD_CONFIG_FRAGMENT after setting all variables")
    685a2ade ("ANDROID: fips140: add crypto_memneq() back to the module")
    320dfca5 ("ANDROID: fips140: fix in-tree builds")
    d4966a82 ("ANDROID: fips140: remove CONFIG_CRYPTO_FIPS140 option")
    6da26b87 ("ANDROID: fips140: require 'm' to enable CRYPTO_FIPS140_MOD")
    bfcfcce3 ("ANDROID: fips140: unapply ABS32 relocations generated by KCFI")
    63f46b45 ("ANDROID: fips140: eliminate crypto-fips.a build step")
    ae4ca7a0 ("ANDROID: fips140: allow building without LTO")
    e8b59bcd ("ANDROID: fips140: fix the error injection module parameters")
    9cef46f3 ("ANDROID: remove LTO check from build.config.gki.aarch64.fips140")
    b1f8c250 ("ANDROID: fips140 - add option for debugging the integrity check")
    7b301c70 ("ANDROID: fips140 - fix integrity check by unapplying dynamic SCS")
  android14-6.1:
    3f5807c5 ("ANDROID: fips140: change linker script guard")

Bug: 153614920
Bug: 188620248
Test: Tested that the module builds and can be loaded on a device.
Change-Id: I3fde49dbc3d16b149b072a27ba5b4c6219015c94
Signed-off-by: Ard Biesheuvel <ardb@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>