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Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 160f08e721cc..419ff5fe6939 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -895,6 +895,23 @@ config CRYPTO_AES See <http://csrc.nist.gov/CryptoToolkit/aes/> for more information. +config CRYPTO_AES_TI + tristate "Fixed time AES cipher" + select CRYPTO_ALGAPI + help + This is a generic implementation of AES that attempts to eliminate + data dependent latencies as much as possible without affecting + performance too much. It is intended for use by the generic CCM + and GCM drivers, and other CTR or CMAC/XCBC based modes that rely + solely on encryption (although decryption is supported as well, but + with a more dramatic performance hit) + + Instead of using 16 lookup tables of 1 KB each, (8 for encryption and + 8 for decryption), this implementation only uses just two S-boxes of + 256 bytes each, and attempts to eliminate data dependent latencies by + prefetching the entire table into the cache at the start of each + block. + config CRYPTO_AES_586 tristate "AES cipher algorithms (i586)" depends on (X86 || UML_X86) && !64BIT |