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| author | Eric Biggers <ebiggers@google.com> | 2018-12-03 19:52:52 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-12-13 18:24:37 +0800 |
| commit | 19c11c97c39f5c6280b4d523ea170ef9a8f7ed12 (patch) | |
| tree | 85b240d06e5865718c89e2c654415b17869b83b4 | |
| parent | 95a34b779e2a45b14e73cee1e7eec11870efb2ea (diff) | |
| download | linux-19c11c97c39f5c6280b4d523ea170ef9a8f7ed12.tar.gz linux-19c11c97c39f5c6280b4d523ea170ef9a8f7ed12.tar.bz2 linux-19c11c97c39f5c6280b4d523ea170ef9a8f7ed12.zip | |
crypto: arm64/chacha - add XChaCha12 support
Now that the ARM64 NEON implementation of ChaCha20 and XChaCha20 has
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: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | arch/arm64/crypto/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm64/crypto/chacha-neon-glue.c | 18 |
2 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig index d54ddb8468ef..d9a523ecdd83 100644 --- a/arch/arm64/crypto/Kconfig +++ b/arch/arm64/crypto/Kconfig @@ -101,7 +101,7 @@ config CRYPTO_AES_ARM64_NEON_BLK select CRYPTO_SIMD config CRYPTO_CHACHA20_NEON - tristate "ChaCha20 and XChaCha20 stream ciphers using NEON instructions" + tristate "ChaCha20, XChaCha20, and XChaCha12 stream ciphers using NEON instructions" depends on KERNEL_MODE_NEON select CRYPTO_BLKCIPHER select CRYPTO_CHACHA20 diff --git a/arch/arm64/crypto/chacha-neon-glue.c b/arch/arm64/crypto/chacha-neon-glue.c index 4d992029b912..346eb85498a1 100644 --- a/arch/arm64/crypto/chacha-neon-glue.c +++ b/arch/arm64/crypto/chacha-neon-glue.c @@ -161,6 +161,22 @@ static struct skcipher_alg algs[] = { .setkey = crypto_chacha20_setkey, .encrypt = xchacha_neon, .decrypt = xchacha_neon, + }, { + .base.cra_name = "xchacha12", + .base.cra_driver_name = "xchacha12-neon", + .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, + .walksize = 4 * CHACHA_BLOCK_SIZE, + .setkey = crypto_chacha12_setkey, + .encrypt = xchacha_neon, + .decrypt = xchacha_neon, } }; @@ -187,3 +203,5 @@ MODULE_ALIAS_CRYPTO("chacha20"); MODULE_ALIAS_CRYPTO("chacha20-neon"); MODULE_ALIAS_CRYPTO("xchacha20"); MODULE_ALIAS_CRYPTO("xchacha20-neon"); +MODULE_ALIAS_CRYPTO("xchacha12"); +MODULE_ALIAS_CRYPTO("xchacha12-neon"); |