Skip to content

Commit

Permalink
crypto: arm - move ARM specific Kconfig definitions to a dedicated file
Browse files Browse the repository at this point in the history 
This moves all Kconfig symbols defined in crypto/Kconfig that depend
on CONFIG_ARM to a dedicated Kconfig file in arch/arm/crypto, which is
where the code that implements those features resides as well.

Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
  • Loading branch information
@herbertx
Ard Biesheuvel authored and herbertx committed Mar 12, 2015
1 parent 1eb8a1b commit 652ccae
Show file tree
Hide file tree
Showing 3 changed files with 88 additions and 75 deletions.
3 changes: 3 additions & 0 deletions arch/arm/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2167,6 +2167,9 @@ source "arch/arm/Kconfig.debug"
source "security/Kconfig"

source "crypto/Kconfig"
if CRYPTO
source "arch/arm/crypto/Kconfig"
endif

source "lib/Kconfig"

Expand Down
85 changes: 85 additions & 0 deletions arch/arm/crypto/Kconfig
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,85 @@

menuconfig ARM_CRYPTO
bool "ARM Accelerated Cryptographic Algorithms"
depends on ARM
help
Say Y here to choose from a selection of cryptographic algorithms
implemented using ARM specific CPU features or instructions.

if ARM_CRYPTO

config CRYPTO_SHA1_ARM
tristate "SHA1 digest algorithm (ARM-asm)"
select CRYPTO_SHA1
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
using optimized ARM assembler.

config CRYPTO_SHA1_ARM_NEON
tristate "SHA1 digest algorithm (ARM NEON)"
depends on KERNEL_MODE_NEON
select CRYPTO_SHA1_ARM
select CRYPTO_SHA1
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
using optimized ARM NEON assembly, when NEON instructions are
available.

config CRYPTO_SHA512_ARM_NEON
tristate "SHA384 and SHA512 digest algorithm (ARM NEON)"
depends on KERNEL_MODE_NEON
select CRYPTO_SHA512
select CRYPTO_HASH
help
SHA-512 secure hash standard (DFIPS 180-2) implemented
using ARM NEON instructions, when available.

This version of SHA implements a 512 bit hash with 256 bits of
security against collision attacks.

This code also includes SHA-384, a 384 bit hash with 192 bits
of security against collision attacks.

config CRYPTO_AES_ARM
tristate "AES cipher algorithms (ARM-asm)"
depends on ARM
select CRYPTO_ALGAPI
select CRYPTO_AES
help
Use optimized AES assembler routines for ARM platforms.

AES cipher algorithms (FIPS-197). AES uses the Rijndael
algorithm.

Rijndael appears to be consistently a very good performer in
both hardware and software across a wide range of computing
environments regardless of its use in feedback or non-feedback
modes. Its key setup time is excellent, and its key agility is
good. Rijndael's very low memory requirements make it very well
suited for restricted-space environments, in which it also
demonstrates excellent performance. Rijndael's operations are
among the easiest to defend against power and timing attacks.

The AES specifies three key sizes: 128, 192 and 256 bits

See <http://csrc.nist.gov/encryption/aes/> for more information.

config CRYPTO_AES_ARM_BS
tristate "Bit sliced AES using NEON instructions"
depends on KERNEL_MODE_NEON
select CRYPTO_ALGAPI
select CRYPTO_AES_ARM
select CRYPTO_ABLK_HELPER
help
Use a faster and more secure NEON based implementation of AES in CBC,
CTR and XTS modes

Bit sliced AES gives around 45% speedup on Cortex-A15 for CTR mode
and for XTS mode encryption, CBC and XTS mode decryption speedup is
around 25%. (CBC encryption speed is not affected by this driver.)
This implementation does not rely on any lookup tables so it is
believed to be invulnerable to cache timing attacks.

endif
75 changes: 0 additions & 75 deletions crypto/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -572,26 +572,6 @@ config CRYPTO_SHA1_SPARC64
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
using sparc64 crypto instructions, when available.

config CRYPTO_SHA1_ARM
tristate "SHA1 digest algorithm (ARM-asm)"
depends on ARM
select CRYPTO_SHA1
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
using optimized ARM assembler.

config CRYPTO_SHA1_ARM_NEON
tristate "SHA1 digest algorithm (ARM NEON)"
depends on ARM && KERNEL_MODE_NEON
select CRYPTO_SHA1_ARM
select CRYPTO_SHA1
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
using optimized ARM NEON assembly, when NEON instructions are
available.

config CRYPTO_SHA1_PPC
tristate "SHA1 digest algorithm (powerpc)"
depends on PPC
Expand Down Expand Up @@ -691,21 +671,6 @@ config CRYPTO_SHA512_SPARC64
SHA-512 secure hash standard (DFIPS 180-2) implemented
using sparc64 crypto instructions, when available.

config CRYPTO_SHA512_ARM_NEON
tristate "SHA384 and SHA512 digest algorithm (ARM NEON)"
depends on ARM && KERNEL_MODE_NEON
select CRYPTO_SHA512
select CRYPTO_HASH
help
SHA-512 secure hash standard (DFIPS 180-2) implemented
using ARM NEON instructions, when available.

This version of SHA implements a 512 bit hash with 256 bits of
security against collision attacks.

This code also includes SHA-384, a 384 bit hash with 192 bits
of security against collision attacks.

config CRYPTO_TGR192
tristate "Tiger digest algorithms"
select CRYPTO_HASH
Expand Down Expand Up @@ -868,46 +833,6 @@ config CRYPTO_AES_SPARC64
for some popular block cipher mode is supported too, including
ECB and CBC.

config CRYPTO_AES_ARM
tristate "AES cipher algorithms (ARM-asm)"
depends on ARM
select CRYPTO_ALGAPI
select CRYPTO_AES
help
Use optimized AES assembler routines for ARM platforms.

AES cipher algorithms (FIPS-197). AES uses the Rijndael
algorithm.

Rijndael appears to be consistently a very good performer in
both hardware and software across a wide range of computing
environments regardless of its use in feedback or non-feedback
modes. Its key setup time is excellent, and its key agility is
good. Rijndael's very low memory requirements make it very well
suited for restricted-space environments, in which it also
demonstrates excellent performance. Rijndael's operations are
among the easiest to defend against power and timing attacks.

The AES specifies three key sizes: 128, 192 and 256 bits

See <http://csrc.nist.gov/encryption/aes/> for more information.

config CRYPTO_AES_ARM_BS
tristate "Bit sliced AES using NEON instructions"
depends on ARM && KERNEL_MODE_NEON
select CRYPTO_ALGAPI
select CRYPTO_AES_ARM
select CRYPTO_ABLK_HELPER
help
Use a faster and more secure NEON based implementation of AES in CBC,
CTR and XTS modes

Bit sliced AES gives around 45% speedup on Cortex-A15 for CTR mode
and for XTS mode encryption, CBC and XTS mode decryption speedup is
around 25%. (CBC encryption speed is not affected by this driver.)
This implementation does not rely on any lookup tables so it is
believed to be invulnerable to cache timing attacks.

config CRYPTO_AES_PPC_SPE
tristate "AES cipher algorithms (PPC SPE)"
depends on PPC && SPE
Expand Down

0 comments on commit 652ccae

Please sign in to comment.