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_SHA1_ARM_CE tristate "SHA1 digest algorithm (ARM v8 Crypto Extensions)" 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 special ARMv8 Crypto Extensions. 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 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