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Donenfeld" , Eric Biggers , Holger Dengler , Harald Freudenberger , Herbert Xu , linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 11/15] lib/crypto: sha3: Support arch overrides of one-shot digest functions Date: Sat, 25 Oct 2025 22:50:28 -0700 Message-ID: <20251026055032.1413733-12-ebiggers@kernel.org> X-Mailer: git-send-email 2.51.1.dirty In-Reply-To: <20251026055032.1413733-1-ebiggers@kernel.org> References: <20251026055032.1413733-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add support for architecture-specific overrides of sha3_224(), sha3_256(), sha3_384(), and sha3_512(). This will be used to implement these functions more efficiently on s390 than is possible via the usual init + update + final flow. Signed-off-by: Eric Biggers --- lib/crypto/sha3.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/lib/crypto/sha3.c b/lib/crypto/sha3.c index 6c94b4ebd0fd1..a598138d47a59 100644 --- a/lib/crypto/sha3.c +++ b/lib/crypto/sha3.c @@ -278,44 +278,81 @@ void shake_squeeze(struct shake_ctx *shake_ctx, u8 *out, size_t out_len) } ctx->squeeze_offset = squeeze_offset; } EXPORT_SYMBOL_GPL(shake_squeeze); +#ifndef sha3_224_arch +static inline bool sha3_224_arch(const u8 *in, size_t in_len, + u8 out[SHA3_224_DIGEST_SIZE]) +{ + return false; +} +#endif +#ifndef sha3_256_arch +static inline bool sha3_256_arch(const u8 *in, size_t in_len, + u8 out[SHA3_256_DIGEST_SIZE]) +{ + return false; +} +#endif +#ifndef sha3_384_arch +static inline bool sha3_384_arch(const u8 *in, size_t in_len, + u8 out[SHA3_384_DIGEST_SIZE]) +{ + return false; +} +#endif +#ifndef sha3_512_arch +static inline bool sha3_512_arch(const u8 *in, size_t in_len, + u8 out[SHA3_512_DIGEST_SIZE]) +{ + return false; +} +#endif + void sha3_224(const u8 *in, size_t in_len, u8 out[SHA3_224_DIGEST_SIZE]) { struct sha3_ctx ctx; + if (sha3_224_arch(in, in_len, out)) + return; sha3_224_init(&ctx); sha3_update(&ctx, in, in_len); sha3_final(&ctx, out); } EXPORT_SYMBOL_GPL(sha3_224); void sha3_256(const u8 *in, size_t in_len, u8 out[SHA3_256_DIGEST_SIZE]) { struct sha3_ctx ctx; + if (sha3_256_arch(in, in_len, out)) + return; sha3_256_init(&ctx); sha3_update(&ctx, in, in_len); sha3_final(&ctx, out); } EXPORT_SYMBOL_GPL(sha3_256); void sha3_384(const u8 *in, size_t in_len, u8 out[SHA3_384_DIGEST_SIZE]) { struct sha3_ctx ctx; + if (sha3_384_arch(in, in_len, out)) + return; sha3_384_init(&ctx); sha3_update(&ctx, in, in_len); sha3_final(&ctx, out); } EXPORT_SYMBOL_GPL(sha3_384); void sha3_512(const u8 *in, size_t in_len, u8 out[SHA3_512_DIGEST_SIZE]) { struct sha3_ctx ctx; + if (sha3_512_arch(in, in_len, out)) + return; sha3_512_init(&ctx); sha3_update(&ctx, in, in_len); sha3_final(&ctx, out); } EXPORT_SYMBOL_GPL(sha3_512); -- 2.51.1.dirty