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Gusted 356c5055ad
lib/sha256: Remove it (#9643) 
### Purpose

Remove the `lib/sha256` package, because it's no longer necessary. Go's
standard library now has the same performance and is on par with
`sha256-simd` since [Since Go
1.21](1a64574f42).
Therefore using `sha256-simd` has no benefits anymore.

ARM already has optimized sha256 assembly code since
7b8a7f8272,
`sha256-simd` published their results before that optimized assembly was
implemented,
f941fedda8.
The assembly looks very similar and the benchmarks in the Go commit
match that of `sha256-simd`.

This patch removes all of the related code of `lib/sha256` and makes
`crypto/sha256` the 'default'.

Benchmark of `sha256-simd` and `crypto/sha256`:
<details>

```
cpu: AMD Ryzen 5 3600X 6-Core Processor
                │  simd.txt   │               go.txt                │
                │   sec/op    │    sec/op     vs base               │
Hash/8Bytes-12    63.25n ± 1%    73.38n ± 1%  +16.02% (p=0.002 n=6)
Hash/64Bytes-12   98.73n ± 1%   105.30n ± 1%   +6.65% (p=0.002 n=6)
Hash/1K-12        567.2n ± 1%    572.8n ± 1%   +0.99% (p=0.002 n=6)
Hash/8K-12        4.062µ ± 1%    4.062µ ± 1%        ~ (p=0.396 n=6)
Hash/1M-12        512.1µ ± 0%    510.6µ ± 1%        ~ (p=0.485 n=6)
Hash/5M-12        2.556m ± 1%    2.564m ± 0%        ~ (p=0.093 n=6)
Hash/10M-12       5.112m ± 0%    5.127m ± 0%        ~ (p=0.093 n=6)
geomean           13.82µ         14.27µ        +3.28%

                │   simd.txt   │               go.txt                │
                │     B/s      │     B/s       vs base               │
Hash/8Bytes-12    120.6Mi ± 1%   104.0Mi ± 1%  -13.81% (p=0.002 n=6)
Hash/64Bytes-12   618.2Mi ± 1%   579.8Mi ± 1%   -6.22% (p=0.002 n=6)
Hash/1K-12        1.682Gi ± 1%   1.665Gi ± 1%   -0.98% (p=0.002 n=6)
Hash/8K-12        1.878Gi ± 1%   1.878Gi ± 1%        ~ (p=0.310 n=6)
Hash/1M-12        1.907Gi ± 0%   1.913Gi ± 1%        ~ (p=0.485 n=6)
Hash/5M-12        1.911Gi ± 1%   1.904Gi ± 0%        ~ (p=0.093 n=6)
Hash/10M-12       1.910Gi ± 0%   1.905Gi ± 0%        ~ (p=0.093 n=6)
geomean           1.066Gi        1.032Gi        -3.18%
```

</details>


### Testing

Compiled and tested on Linux.

### Documentation

https://github.com/syncthing/docs/pull/874
2024-08-10 12:58:20 +01:00
..
basicfs_copy_range_copyfilerange.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_copy_range_duplicateextents.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_copy_range_ioctl.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_copy_range_sendfile.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_copy_range.go lib/fs: Unwrap mtimeFile, get fd the "correct" way (ref #6875) (#6877) 2020-08-07 07:47:48 +02:00
basicfs_fileinfo_bsdish.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
basicfs_fileinfo_linuxish.go lib/fs: Ignore inode change time on Android (#9177) 2023-10-21 08:24:29 +02:00
basicfs_fileinfo_unix.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_fileinfo_windows.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
basicfs_lstat_broken.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_lstat_regular.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_lstat_windows.go lib/fs: Properly handle Windows deduplicated files (fixes #9120) (#9168) 2023-10-11 14:40:55 +02:00
basicfs_platformdata_unix.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
basicfs_platformdata_windows.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
basicfs_test.go lib/fs: Let xattr test avoid non-test attributes (fixes #8601) (#8628) 2022-11-03 11:57:30 +01:00
basicfs_unix.go lib/fs: Try to remove read only Windows files (fixes #3744) (#8650) 2022-11-07 21:33:17 +01:00
basicfs_watch_errors_linux.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_watch_errors_others.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_watch_eventtypes_darwin.go all: minimal set of changes for iOS app (#9619) 2024-07-31 07:31:14 +02:00
basicfs_watch_eventtypes_fen.go lib/fs: Do not follow symlinks in watcher on solaris (fixes #8020) (#8223) 2022-03-24 08:36:43 +01:00
basicfs_watch_eventtypes_inotify.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_watch_eventtypes_kqueue.go lib/fs, lib/model: Add warning about kqueue resource usage (fixes #7855) (#8249) 2022-04-05 21:32:06 +02:00
basicfs_watch_eventtypes_other.go all: minimal set of changes for iOS app (#9619) 2024-07-31 07:31:14 +02:00
basicfs_watch_eventtypes_readdcw.go all: Update build constraints to Go 1.17 style (#7894) 2021-08-17 10:10:41 +02:00
basicfs_watch_notkqueue.go lib/fs, lib/model: Add warning about kqueue resource usage (fixes #7855) (#8249) 2022-04-05 21:32:06 +02:00
basicfs_watch_test.go lib/ignore: Refactor out result type (#9343) 2024-01-13 18:58:23 +01:00
basicfs_watch_unsupported.go all: minimal set of changes for iOS app (#9619) 2024-07-31 07:31:14 +02:00
basicfs_watch.go all: minimal set of changes for iOS app (#9619) 2024-07-31 07:31:14 +02:00
basicfs_windows_test.go build: Tests should run with Go 1.20 on Windows (#8924) 2023-06-05 10:19:47 +02:00
basicfs_windows.go lib/fs: Try to remove read only Windows files (fixes #3744) (#8650) 2022-11-07 21:33:17 +01:00
basicfs_xattr_bsdish.go all: Fix typos found by codespell (#8833) 2023-03-21 08:07:28 +01:00
basicfs_xattr_linuxish.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
basicfs_xattr_unix.go lib/fs: Reduce memory usage in xattrs handling (#9251) 2023-12-04 12:48:17 +01:00
basicfs_xattr_unsupported.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
basicfs.go lib/fs: Clarify errors for Windows filenames (fixes #8968) (#8969) 2023-07-07 11:00:40 +00:00
casefs_test.go all: Fix various user-facing and non-user-facing typos (#8509) 2022-08-23 15:44:11 +02:00
casefs.go build: Update all dependencies (fixes #8679) (#8680) 2022-11-17 21:26:10 +01:00
copyrangemethod.go all: Use protobuf to generate config structs (fixes #6734) (#6900) 2020-08-25 08:11:14 +02:00
copyrangemethod.pb.go all: Move remaining protos to use the vanity plugin (#7009) 2020-10-02 08:07:05 +02:00
debug.go all, lib/logger: Refactor SetDebug calls (#6054) 2019-10-04 13:03:34 +02:00
errorfs.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
fakefs_test.go all: Add build constants for runtime.GOOS comparisons (#8442) 2022-07-28 19:36:39 +02:00
fakefs.go lib/fs: Add missing locks to fakeFile methods (fixes #9499) (#9603) 2024-07-09 10:33:30 +02:00
filesystem_copy_range_allwithfallback.go lib/fs: Add support for Windows duplicate extents (#6764) 2020-06-18 22:32:26 +01:00
filesystem_copy_range_standard.go all: Add copy-on-write filesystem support (fixes #4271) (#6746) 2020-06-18 08:15:47 +02:00
filesystem_copy_range_test.go all: Add Prometheus-style metrics to expose some internal performance counters (fixes #5175) (#9003) 2023-08-04 19:57:30 +02:00
filesystem_copy_range.go all: Add copy-on-write filesystem support (fixes #4271) (#6746) 2020-06-18 08:15:47 +02:00
filesystem_test.go all: Correct various typos (#8870) 2023-05-09 08:54:02 +02:00
filesystem.go lib/ignore: Optimise ignoring directories for filesystem watcher (fixes #9339) (#9340) 2024-01-15 10:13:22 +00:00
folding_test.go lib/fs: Fix UnicodeLowercaseNormalized on lowercase NFD (#7692) 2021-05-17 20:43:07 +02:00
folding.go lib/fs: Fix UnicodeLowercaseNormalized on lowercase NFD (#7692) 2021-05-17 20:43:07 +02:00
logfs.go all: Remove unused method receivers (#8462) 2022-07-28 17:32:45 +02:00
metrics.go lib/fs, lib/model: Be careful about potentially negative durations (fixes #9112) (#9113) 2023-09-20 09:04:47 +02:00
mtimefs_test.go all: Add Prometheus-style metrics to expose some internal performance counters (fixes #5175) (#9003) 2023-08-04 19:57:30 +02:00
mtimefs.go lib/fs: Better equality comparison in mtimefs 2023-12-03 16:01:46 +01:00
platform_common.go all: Support syncing extended attributes (fixes #2698) (#8513) 2022-09-14 09:50:55 +02:00
tempname_test.go lib/fs: Optimize TempName + some cosmetic changes (#7911) 2021-08-29 10:47:53 +02:00
tempname.go lib/sha256: Remove it (#9643) 2024-08-10 12:58:20 +01:00
types.go all: Use protobuf to generate config structs (fixes #6734) (#6900) 2020-08-25 08:11:14 +02:00
types.pb.go all: Move remaining protos to use the vanity plugin (#7009) 2020-10-02 08:07:05 +02:00
util_test.go lib/fs: Clarify errors for Windows filenames (fixes #8968) (#8969) 2023-07-07 11:00:40 +00:00
util.go lib/fs: Clarify errors for Windows filenames (fixes #8968) (#8969) 2023-07-07 11:00:40 +00:00
walkfs_test.go all: Add build constants for runtime.GOOS comparisons (#8442) 2022-07-28 19:36:39 +02:00
walkfs.go all: Remove unused method receivers (#8462) 2022-07-28 17:32:45 +02:00