| # SPDX-License-Identifier: GPL-2.0 | |
| menu "Accelerated Cryptographic Algorithms for CPU (arm)" | |
| config CRYPTO_GHASH_ARM_CE | |
| tristate "AEAD cipher: AES in GCM mode (ARMv8 Crypto Extensions)" | |
| depends on KERNEL_MODE_NEON | |
| select CRYPTO_AEAD | |
| select CRYPTO_LIB_AES | |
| select CRYPTO_LIB_GF128MUL | |
| help | |
| AEAD cipher: AES-GCM | |
| Architecture: arm using | |
| - ARMv8 Crypto Extensions | |
| config CRYPTO_AES_ARM_BS | |
| tristate "Ciphers: AES, modes: ECB/CBC/CTR/XTS (bit-sliced NEON)" | |
| depends on KERNEL_MODE_NEON | |
| select CRYPTO_SKCIPHER | |
| select CRYPTO_LIB_AES | |
| help | |
| Length-preserving ciphers: AES cipher algorithms (FIPS-197) | |
| with block cipher modes: | |
| - ECB (Electronic Codebook) mode (NIST SP800-38A) | |
| - CBC (Cipher Block Chaining) mode (NIST SP800-38A) | |
| - CTR (Counter) mode (NIST SP800-38A) | |
| - XTS (XOR Encrypt XOR with ciphertext stealing) mode (NIST SP800-38E | |
| and IEEE 1619) | |
| 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.) | |
| The bit sliced AES code does not use lookup tables, so it is believed | |
| to be invulnerable to cache timing attacks. However, since the bit | |
| sliced AES code cannot process single blocks efficiently, in certain | |
| cases table-based code with some countermeasures against cache timing | |
| attacks will still be used as a fallback method; specifically CBC | |
| encryption (not CBC decryption), the encryption of XTS tweaks, XTS | |
| ciphertext stealing when the message isn't a multiple of 16 bytes, and | |
| CTR when invoked in a context in which NEON instructions are unusable. | |
| config CRYPTO_AES_ARM_CE | |
| tristate "Ciphers: AES, modes: ECB/CBC/CTS/CTR/XTS (ARMv8 Crypto Extensions)" | |
| depends on KERNEL_MODE_NEON | |
| select CRYPTO_SKCIPHER | |
| select CRYPTO_LIB_AES | |
| help | |
| Length-preserving ciphers: AES cipher algorithms (FIPS-197) | |
| with block cipher modes: | |
| - ECB (Electronic Codebook) mode (NIST SP800-38A) | |
| - CBC (Cipher Block Chaining) mode (NIST SP800-38A) | |
| - CTR (Counter) mode (NIST SP800-38A) | |
| - CTS (Cipher Text Stealing) mode (NIST SP800-38A) | |
| - XTS (XOR Encrypt XOR with ciphertext stealing) mode (NIST SP800-38E | |
| and IEEE 1619) | |
| Architecture: arm using: | |
| - ARMv8 Crypto Extensions | |
| endmenu | |