diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-12-04 22:20:04 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-12-13 18:24:58 +0800 |
| commit | 7a507d62258afd514583fadf1482451079fa0e4d (patch) | |
| tree | bff7778a6fcb50dc9f8030fe7710f011ce857ff2 | |
| parent | 8b65f34c5821e7361488dc668d21195ea4c9f14d (diff) | |
| download | linux-next-7a507d62258afd514583fadf1482451079fa0e4d.tar.gz | |
crypto: x86/chacha - add XChaCha12 support
Now that the x86_64 SIMD implementations of ChaCha20 and XChaCha20 have
been refactored to support varying the number of rounds, add support for
XChaCha12. This is identical to XChaCha20 except for the number of
rounds, which is 12 instead of 20. This can be used by Adiantum.
Reviewed-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | arch/x86/crypto/chacha_glue.c | 17 | ||||
| -rw-r--r-- | crypto/Kconfig | 4 |
2 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/crypto/chacha_glue.c b/arch/x86/crypto/chacha_glue.c index 35fd02b50d27..d19c2908be90 100644 --- a/arch/x86/crypto/chacha_glue.c +++ b/arch/x86/crypto/chacha_glue.c @@ -232,6 +232,21 @@ static struct skcipher_alg algs[] = { .setkey = crypto_chacha20_setkey, .encrypt = xchacha_simd, .decrypt = xchacha_simd, + }, { + .base.cra_name = "xchacha12", + .base.cra_driver_name = "xchacha12-simd", + .base.cra_priority = 300, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct chacha_ctx), + .base.cra_module = THIS_MODULE, + + .min_keysize = CHACHA_KEY_SIZE, + .max_keysize = CHACHA_KEY_SIZE, + .ivsize = XCHACHA_IV_SIZE, + .chunksize = CHACHA_BLOCK_SIZE, + .setkey = crypto_chacha12_setkey, + .encrypt = xchacha_simd, + .decrypt = xchacha_simd, }, }; @@ -268,3 +283,5 @@ MODULE_ALIAS_CRYPTO("chacha20"); MODULE_ALIAS_CRYPTO("chacha20-simd"); MODULE_ALIAS_CRYPTO("xchacha20"); MODULE_ALIAS_CRYPTO("xchacha20-simd"); +MODULE_ALIAS_CRYPTO("xchacha12"); +MODULE_ALIAS_CRYPTO("xchacha12-simd"); diff --git a/crypto/Kconfig b/crypto/Kconfig index dc3a0e3ea2ac..045af6eeb7e2 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1473,8 +1473,8 @@ config CRYPTO_CHACHA20_X86_64 select CRYPTO_BLKCIPHER select CRYPTO_CHACHA20 help - SSSE3, AVX2, and AVX-512VL optimized implementations of the ChaCha20 - and XChaCha20 stream ciphers. + SSSE3, AVX2, and AVX-512VL optimized implementations of the ChaCha20, + XChaCha20, and XChaCha12 stream ciphers. config CRYPTO_SEED tristate "SEED cipher algorithm" |