From: Eric Biggers ebiggers@google.com
stable inclusion from stable-v5.10.119 commit 72e5b68f33a12a99d6fdf702ca739fc5250a9fc0 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6BB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 057edc9c8bb2d5ff5b058b521792c392428a0714 upstream.
Move most of blake2s_update() and blake2s_final() into new inline functions __blake2s_update() and __blake2s_final() in include/crypto/internal/blake2s.h so that this logic can be shared by the shash helper functions. This will avoid duplicating this logic between the library and shash implementations.
Signed-off-by: Eric Biggers ebiggers@google.com Acked-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Jason A. Donenfeld Jason@zx2c4.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- include/crypto/internal/blake2s.h | 41 ++++++++++++++++++++++++++ lib/crypto/blake2s.c | 48 ++++++------------------------- 2 files changed, 49 insertions(+), 40 deletions(-)
diff --git a/include/crypto/internal/blake2s.h b/include/crypto/internal/blake2s.h index 6e376ae6b6b5..42deba4b8cee 100644 --- a/include/crypto/internal/blake2s.h +++ b/include/crypto/internal/blake2s.h @@ -4,6 +4,7 @@ #define BLAKE2S_INTERNAL_H
#include <crypto/blake2s.h> +#include <linux/string.h>
struct blake2s_tfm_ctx { u8 key[BLAKE2S_KEY_SIZE]; @@ -23,4 +24,44 @@ static inline void blake2s_set_lastblock(struct blake2s_state *state) state->f[0] = -1; }
+typedef void (*blake2s_compress_t)(struct blake2s_state *state, + const u8 *block, size_t nblocks, u32 inc); + +static inline void __blake2s_update(struct blake2s_state *state, + const u8 *in, size_t inlen, + blake2s_compress_t compress) +{ + const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen; + + if (unlikely(!inlen)) + return; + if (inlen > fill) { + memcpy(state->buf + state->buflen, in, fill); + (*compress)(state, state->buf, 1, BLAKE2S_BLOCK_SIZE); + state->buflen = 0; + in += fill; + inlen -= fill; + } + if (inlen > BLAKE2S_BLOCK_SIZE) { + const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE); + /* Hash one less (full) block than strictly possible */ + (*compress)(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE); + in += BLAKE2S_BLOCK_SIZE * (nblocks - 1); + inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1); + } + memcpy(state->buf + state->buflen, in, inlen); + state->buflen += inlen; +} + +static inline void __blake2s_final(struct blake2s_state *state, u8 *out, + blake2s_compress_t compress) +{ + blake2s_set_lastblock(state); + memset(state->buf + state->buflen, 0, + BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */ + (*compress)(state, state->buf, 1, state->buflen); + cpu_to_le32_array(state->h, ARRAY_SIZE(state->h)); + memcpy(out, state->h, state->outlen); +} + #endif /* BLAKE2S_INTERNAL_H */ diff --git a/lib/crypto/blake2s.c b/lib/crypto/blake2s.c index 6a4b6b78d630..c64ac8bfb6a9 100644 --- a/lib/crypto/blake2s.c +++ b/lib/crypto/blake2s.c @@ -15,55 +15,23 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/bug.h> -#include <asm/unaligned.h> + +#if IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S) +# define blake2s_compress blake2s_compress_arch +#else +# define blake2s_compress blake2s_compress_generic +#endif
void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen) { - const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen; - - if (unlikely(!inlen)) - return; - if (inlen > fill) { - memcpy(state->buf + state->buflen, in, fill); - if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)) - blake2s_compress_arch(state, state->buf, 1, - BLAKE2S_BLOCK_SIZE); - else - blake2s_compress_generic(state, state->buf, 1, - BLAKE2S_BLOCK_SIZE); - state->buflen = 0; - in += fill; - inlen -= fill; - } - if (inlen > BLAKE2S_BLOCK_SIZE) { - const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE); - /* Hash one less (full) block than strictly possible */ - if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)) - blake2s_compress_arch(state, in, nblocks - 1, - BLAKE2S_BLOCK_SIZE); - else - blake2s_compress_generic(state, in, nblocks - 1, - BLAKE2S_BLOCK_SIZE); - in += BLAKE2S_BLOCK_SIZE * (nblocks - 1); - inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1); - } - memcpy(state->buf + state->buflen, in, inlen); - state->buflen += inlen; + __blake2s_update(state, in, inlen, blake2s_compress); } EXPORT_SYMBOL(blake2s_update);
void blake2s_final(struct blake2s_state *state, u8 *out) { WARN_ON(IS_ENABLED(DEBUG) && !out); - blake2s_set_lastblock(state); - memset(state->buf + state->buflen, 0, - BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */ - if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)) - blake2s_compress_arch(state, state->buf, 1, state->buflen); - else - blake2s_compress_generic(state, state->buf, 1, state->buflen); - cpu_to_le32_array(state->h, ARRAY_SIZE(state->h)); - memcpy(out, state->h, state->outlen); + __blake2s_final(state, out, blake2s_compress); memzero_explicit(state, sizeof(*state)); } EXPORT_SYMBOL(blake2s_final);