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| author | Eric Biggers <ebiggers@google.com> | 2022-07-09 23:18:49 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-07-15 10:43:59 +0200 |
| commit | ec8f7f4821d5e70d71601519bc2325b311324a96 (patch) | |
| tree | 45c64f86acc7dac2c6a2087c38787f4ac2ce79f9 /crypto | |
| parent | crypto: lib - move lib/sha1.c into lib/crypto/ (diff) | |
| download | linux-ec8f7f4821d5e70d71601519bc2325b311324a96.tar.xz linux-ec8f7f4821d5e70d71601519bc2325b311324a96.zip | |
crypto: lib - make the sha1 library optional
Since the Linux RNG no longer uses sha1_transform(), the SHA-1 library
is no longer needed unconditionally. Make it possible to build the
Linux kernel without the SHA-1 library by putting it behind a kconfig
option, and selecting this new option from the kconfig options that gate
the remaining users: CRYPTO_SHA1 for crypto/sha1_generic.c, BPF for
kernel/bpf/core.c, and IPV6 for net/ipv6/addrconf.c.
Unfortunately, since BPF is selected by NET, for now this can only make
a difference for kernels built without networking support.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 54bdcf2ce331..75c71d9a5ffb 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -901,6 +901,7 @@ config CRYPTO_RMD160 config CRYPTO_SHA1 tristate "SHA1 digest algorithm" select CRYPTO_HASH + select CRYPTO_LIB_SHA1 help SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2). |