From: "Jason A. Donenfeld" <Jason@xxxxxxxxx>
commit 6048fdcc5f269c7f31d774c295ce59081b36e6f9 upstream.
In preparation for using blake2s in the RNG, we change the way that it
is wired-in to the build system. Instead of using ifdefs to select the
right symbol, we use weak symbols. And because ARM doesn't need the
generic implementation, we make the generic one default only if an arch
library doesn't need it already, and then have arch libraries that do
need it opt-in. So that the arch libraries can remain tristate rather
than bool, we then split the shash part from the glue code.
Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: linux-kbuild@xxxxxxxxxxxxxxx
Cc: linux-crypto@xxxxxxxxxxxxxxx
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/crypto/Makefile | 4 +
arch/x86/crypto/blake2s-glue.c | 68 ++-------------------------------
arch/x86/crypto/blake2s-shash.c | 77 ++++++++++++++++++++++++++++++++++++++
crypto/Kconfig | 3 -
drivers/net/Kconfig | 1
include/crypto/internal/blake2s.h | 6 +-
lib/crypto/Kconfig | 23 ++---------
lib/crypto/Makefile | 9 +---
lib/crypto/blake2s-generic.c | 6 ++
lib/crypto/blake2s.c | 6 --
10 files changed, 106 insertions(+), 97 deletions(-)
create mode 100644 arch/x86/crypto/blake2s-shash.c
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -66,7 +66,9 @@ obj-$(CONFIG_CRYPTO_SHA512_SSSE3) += sha
sha512-ssse3-y := sha512-ssse3-asm.o sha512-avx-asm.o sha512-avx2-asm.o sha512_ssse3_glue.o
obj-$(CONFIG_CRYPTO_BLAKE2S_X86) += blake2s-x86_64.o
-blake2s-x86_64-y := blake2s-core.o blake2s-glue.o
+blake2s-x86_64-y := blake2s-shash.o
+obj-$(if $(CONFIG_CRYPTO_BLAKE2S_X86),y) += libblake2s-x86_64.o
+libblake2s-x86_64-y := blake2s-core.o blake2s-glue.o
obj-$(CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL) += ghash-clmulni-intel.o
ghash-clmulni-intel-y := ghash-clmulni-intel_asm.o ghash-clmulni-intel_glue.o
--- a/arch/x86/crypto/blake2s-glue.c
+++ b/arch/x86/crypto/blake2s-glue.c
@@ -5,7 +5,6 @@
#include <crypto/internal/blake2s.h>
#include <crypto/internal/simd.h>
-#include <crypto/internal/hash.h>
#include <linux/types.h>
#include <linux/jump_label.h>
@@ -28,9 +27,8 @@ asmlinkage void blake2s_compress_avx512(
static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
-void blake2s_compress_arch(struct blake2s_state *state,
- const u8 *block, size_t nblocks,
- const u32 inc)
+void blake2s_compress(struct blake2s_state *state, const u8 *block,
+ size_t nblocks, const u32 inc)
{
/* SIMD disables preemption, so relax after processing each page. */
BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
@@ -56,49 +54,12 @@ void blake2s_compress_arch(struct blake2
block += blocks * BLAKE2S_BLOCK_SIZE;
} while (nblocks);
}
-EXPORT_SYMBOL(blake2s_compress_arch);
-
-static int crypto_blake2s_update_x86(struct shash_desc *desc,
- const u8 *in, unsigned int inlen)
-{
- return crypto_blake2s_update(desc, in, inlen, blake2s_compress_arch);
-}
-
-static int crypto_blake2s_final_x86(struct shash_desc *desc, u8 *out)
-{
- return crypto_blake2s_final(desc, out, blake2s_compress_arch);
-}
-
-#define BLAKE2S_ALG(name, driver_name, digest_size) \
- { \
- .base.cra_name = name, \
- .base.cra_driver_name = driver_name, \
- .base.cra_priority = 200, \
- .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
- .base.cra_blocksize = BLAKE2S_BLOCK_SIZE, \
- .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx), \
- .base.cra_module = THIS_MODULE, \
- .digestsize = digest_size, \
- .setkey = crypto_blake2s_setkey, \
- .init = crypto_blake2s_init, \
- .update = crypto_blake2s_update_x86, \
- .final = crypto_blake2s_final_x86, \
- .descsize = sizeof(struct blake2s_state), \
- }
-
-static struct shash_alg blake2s_algs[] = {
- BLAKE2S_ALG("blake2s-128", "blake2s-128-x86", BLAKE2S_128_HASH_SIZE),
- BLAKE2S_ALG("blake2s-160", "blake2s-160-x86", BLAKE2S_160_HASH_SIZE),
- BLAKE2S_ALG("blake2s-224", "blake2s-224-x86", BLAKE2S_224_HASH_SIZE),
- BLAKE2S_ALG("blake2s-256", "blake2s-256-x86", BLAKE2S_256_HASH_SIZE),
-};
+EXPORT_SYMBOL(blake2s_compress);
static int __init blake2s_mod_init(void)
{
- if (!boot_cpu_has(X86_FEATURE_SSSE3))
- return 0;
-
- static_branch_enable(&blake2s_use_ssse3);
+ if (boot_cpu_has(X86_FEATURE_SSSE3))
+ static_branch_enable(&blake2s_use_ssse3);
if (IS_ENABLED(CONFIG_AS_AVX512) &&
boot_cpu_has(X86_FEATURE_AVX) &&
@@ -109,26 +70,9 @@ static int __init blake2s_mod_init(void)
XFEATURE_MASK_AVX512, NULL))
static_branch_enable(&blake2s_use_avx512);
- return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
- crypto_register_shashes(blake2s_algs,
- ARRAY_SIZE(blake2s_algs)) : 0;
-}
-
-static void __exit blake2s_mod_exit(void)
-{
- if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
- crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
+ return 0;
}
module_init(blake2s_mod_init);
-module_exit(blake2s_mod_exit);
-MODULE_ALIAS_CRYPTO("blake2s-128");
-MODULE_ALIAS_CRYPTO("blake2s-128-x86");
-MODULE_ALIAS_CRYPTO("blake2s-160");
-MODULE_ALIAS_CRYPTO("blake2s-160-x86");
-MODULE_ALIAS_CRYPTO("blake2s-224");
-MODULE_ALIAS_CRYPTO("blake2s-224-x86");
-MODULE_ALIAS_CRYPTO("blake2s-256");
-MODULE_ALIAS_CRYPTO("blake2s-256-x86");
MODULE_LICENSE("GPL v2");
--- /dev/null
+++ b/arch/x86/crypto/blake2s-shash.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@xxxxxxxxx>. All Rights Reserved.
+ */
+
+#include <crypto/internal/blake2s.h>
+#include <crypto/internal/simd.h>
+#include <crypto/internal/hash.h>
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sizes.h>
+
+#include <asm/cpufeature.h>
+#include <asm/processor.h>
+
+static int crypto_blake2s_update_x86(struct shash_desc *desc,
+ const u8 *in, unsigned int inlen)
+{
+ return crypto_blake2s_update(desc, in, inlen, blake2s_compress);
+}
+
+static int crypto_blake2s_final_x86(struct shash_desc *desc, u8 *out)
+{
+ return crypto_blake2s_final(desc, out, blake2s_compress);
+}
+
+#define BLAKE2S_ALG(name, driver_name, digest_size) \
+ { \
+ .base.cra_name = name, \
+ .base.cra_driver_name = driver_name, \
+ .base.cra_priority = 200, \
+ .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
+ .base.cra_blocksize = BLAKE2S_BLOCK_SIZE, \
+ .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx), \
+ .base.cra_module = THIS_MODULE, \
+ .digestsize = digest_size, \
+ .setkey = crypto_blake2s_setkey, \
+ .init = crypto_blake2s_init, \
+ .update = crypto_blake2s_update_x86, \
+ .final = crypto_blake2s_final_x86, \
+ .descsize = sizeof(struct blake2s_state), \
+ }
+
+static struct shash_alg blake2s_algs[] = {
+ BLAKE2S_ALG("blake2s-128", "blake2s-128-x86", BLAKE2S_128_HASH_SIZE),
+ BLAKE2S_ALG("blake2s-160", "blake2s-160-x86", BLAKE2S_160_HASH_SIZE),
+ BLAKE2S_ALG("blake2s-224", "blake2s-224-x86", BLAKE2S_224_HASH_SIZE),
+ BLAKE2S_ALG("blake2s-256", "blake2s-256-x86", BLAKE2S_256_HASH_SIZE),
+};
+
+static int __init blake2s_mod_init(void)
+{
+ if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
+ return crypto_register_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
+ return 0;
+}
+
+static void __exit blake2s_mod_exit(void)
+{
+ if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
+ crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
+}
+
+module_init(blake2s_mod_init);
+module_exit(blake2s_mod_exit);
+
+MODULE_ALIAS_CRYPTO("blake2s-128");
+MODULE_ALIAS_CRYPTO("blake2s-128-x86");
+MODULE_ALIAS_CRYPTO("blake2s-160");
+MODULE_ALIAS_CRYPTO("blake2s-160-x86");
+MODULE_ALIAS_CRYPTO("blake2s-224");
+MODULE_ALIAS_CRYPTO("blake2s-224-x86");
+MODULE_ALIAS_CRYPTO("blake2s-256");
+MODULE_ALIAS_CRYPTO("blake2s-256-x86");
+MODULE_LICENSE("GPL v2");
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1936,9 +1936,10 @@ config CRYPTO_STATS
config CRYPTO_HASH_INFO
bool
-source "lib/crypto/Kconfig"
source "drivers/crypto/Kconfig"
source "crypto/asymmetric_keys/Kconfig"
source "certs/Kconfig"
endif # if CRYPTO
+
+source "lib/crypto/Kconfig"
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -80,7 +80,6 @@ config WIREGUARD
select CRYPTO
select CRYPTO_LIB_CURVE25519
select CRYPTO_LIB_CHACHA20POLY1305
- select CRYPTO_LIB_BLAKE2S
select CRYPTO_CHACHA20_X86_64 if X86 && 64BIT
select CRYPTO_POLY1305_X86_64 if X86 && 64BIT
select CRYPTO_BLAKE2S_X86 if X86 && 64BIT
--- a/include/crypto/internal/blake2s.h
+++ b/include/crypto/internal/blake2s.h
@@ -11,11 +11,11 @@
#include <crypto/internal/hash.h>
#include <linux/string.h>
-void blake2s_compress_generic(struct blake2s_state *state,const u8 *block,
+void blake2s_compress_generic(struct blake2s_state *state, const u8 *block,
size_t nblocks, const u32 inc);
-void blake2s_compress_arch(struct blake2s_state *state,const u8 *block,
- size_t nblocks, const u32 inc);
+void blake2s_compress(struct blake2s_state *state, const u8 *block,
+ size_t nblocks, const u32 inc);
bool blake2s_selftest(void);
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -1,7 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-comment "Crypto library routines"
-
config CRYPTO_LIB_AES
tristate
@@ -9,14 +7,14 @@ config CRYPTO_LIB_ARC4
tristate
config CRYPTO_ARCH_HAVE_LIB_BLAKE2S
- tristate
+ bool
help
Declares whether the architecture provides an arch-specific
accelerated implementation of the Blake2s library interface,
either builtin or as a module.
config CRYPTO_LIB_BLAKE2S_GENERIC
- tristate
+ def_bool !CRYPTO_ARCH_HAVE_LIB_BLAKE2S
help
This symbol can be depended upon by arch implementations of the
Blake2s library interface that require the generic code as a
@@ -24,15 +22,6 @@ config CRYPTO_LIB_BLAKE2S_GENERIC
implementation is enabled, this implementation serves the users
of CRYPTO_LIB_BLAKE2S.
-config CRYPTO_LIB_BLAKE2S
- tristate "BLAKE2s hash function library"
- depends on CRYPTO_ARCH_HAVE_LIB_BLAKE2S || !CRYPTO_ARCH_HAVE_LIB_BLAKE2S
- select CRYPTO_LIB_BLAKE2S_GENERIC if CRYPTO_ARCH_HAVE_LIB_BLAKE2S=n
- help
- Enable the Blake2s library interface. This interface may be fulfilled
- by either the generic implementation or an arch-specific one, if one
- is available and enabled.
-
config CRYPTO_ARCH_HAVE_LIB_CHACHA
tristate
help
@@ -51,7 +40,7 @@ config CRYPTO_LIB_CHACHA_GENERIC
of CRYPTO_LIB_CHACHA.
config CRYPTO_LIB_CHACHA
- tristate "ChaCha library interface"
+ tristate
depends on CRYPTO_ARCH_HAVE_LIB_CHACHA || !CRYPTO_ARCH_HAVE_LIB_CHACHA
select CRYPTO_LIB_CHACHA_GENERIC if CRYPTO_ARCH_HAVE_LIB_CHACHA=n
help
@@ -76,7 +65,7 @@ config CRYPTO_LIB_CURVE25519_GENERIC
of CRYPTO_LIB_CURVE25519.
config CRYPTO_LIB_CURVE25519
- tristate "Curve25519 scalar multiplication library"
+ tristate
depends on CRYPTO_ARCH_HAVE_LIB_CURVE25519 || !CRYPTO_ARCH_HAVE_LIB_CURVE25519
select CRYPTO_LIB_CURVE25519_GENERIC if CRYPTO_ARCH_HAVE_LIB_CURVE25519=n
help
@@ -111,7 +100,7 @@ config CRYPTO_LIB_POLY1305_GENERIC
of CRYPTO_LIB_POLY1305.
config CRYPTO_LIB_POLY1305
- tristate "Poly1305 library interface"
+ tristate
depends on CRYPTO_ARCH_HAVE_LIB_POLY1305 || !CRYPTO_ARCH_HAVE_LIB_POLY1305
select CRYPTO_LIB_POLY1305_GENERIC if CRYPTO_ARCH_HAVE_LIB_POLY1305=n
help
@@ -120,7 +109,7 @@ config CRYPTO_LIB_POLY1305
is available and enabled.
config CRYPTO_LIB_CHACHA20POLY1305
- tristate "ChaCha20-Poly1305 AEAD support (8-byte nonce library version)"
+ tristate
depends on CRYPTO_ARCH_HAVE_LIB_CHACHA || !CRYPTO_ARCH_HAVE_LIB_CHACHA
depends on CRYPTO_ARCH_HAVE_LIB_POLY1305 || !CRYPTO_ARCH_HAVE_LIB_POLY1305
select CRYPTO_LIB_CHACHA
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -10,11 +10,10 @@ libaes-y := aes.o
obj-$(CONFIG_CRYPTO_LIB_ARC4) += libarc4.o
libarc4-y := arc4.o
-obj-$(CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC) += libblake2s-generic.o
-libblake2s-generic-y += blake2s-generic.o
-
-obj-$(CONFIG_CRYPTO_LIB_BLAKE2S) += libblake2s.o
-libblake2s-y += blake2s.o
+# blake2s is used by the /dev/random driver which is always builtin
+obj-y += libblake2s.o
+libblake2s-y := blake2s.o
+libblake2s-$(CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC) += blake2s-generic.o
obj-$(CONFIG_CRYPTO_LIB_CHACHA20POLY1305) += libchacha20poly1305.o
libchacha20poly1305-y += chacha20poly1305.o
--- a/lib/crypto/blake2s-generic.c
+++ b/lib/crypto/blake2s-generic.c
@@ -37,7 +37,11 @@ static inline void blake2s_increment_cou
state->t[1] += (state->t[0] < inc);
}
-void blake2s_compress_generic(struct blake2s_state *state,const u8 *block,
+void blake2s_compress(struct blake2s_state *state, const u8 *block,
+ size_t nblocks, const u32 inc)
+ __weak __alias(blake2s_compress_generic);
+
+void blake2s_compress_generic(struct blake2s_state *state, const u8 *block,
size_t nblocks, const u32 inc)
{
u32 m[16];
--- a/lib/crypto/blake2s.c
+++ b/lib/crypto/blake2s.c
@@ -16,12 +16,6 @@
#include <linux/init.h>
#include <linux/bug.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)
{
__blake2s_update(state, in, inlen, blake2s_compress);
