diff options
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 650b1b3620d8..bbf51d55724e 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -85,6 +85,7 @@ config CRYPTO_SKCIPHER tristate select CRYPTO_SKCIPHER2 select CRYPTO_ALGAPI + select CRYPTO_ECB config CRYPTO_SKCIPHER2 tristate @@ -689,7 +690,7 @@ config CRYPTO_CTS config CRYPTO_ECB tristate "ECB (Electronic Codebook)" - select CRYPTO_SKCIPHER + select CRYPTO_SKCIPHER2 select CRYPTO_MANAGER help ECB (Electronic Codebook) mode (NIST SP800-38A) @@ -1296,6 +1297,66 @@ config CRYPTO_JITTERENTROPY See https://www.chronox.de/jent.html +choice + prompt "CPU Jitter RNG Memory Size" + default CRYPTO_JITTERENTROPY_MEMSIZE_2 + depends on CRYPTO_JITTERENTROPY + help + The Jitter RNG measures the execution time of memory accesses. + Multiple consecutive memory accesses are performed. If the memory + size fits into a cache (e.g. L1), only the memory access timing + to that cache is measured. The closer the cache is to the CPU + the less variations are measured and thus the less entropy is + obtained. Thus, if the memory size fits into the L1 cache, the + obtained entropy is less than if the memory size fits within + L1 + L2, which in turn is less if the memory fits into + L1 + L2 + L3. Thus, by selecting a different memory size, + the entropy rate produced by the Jitter RNG can be modified. + + config CRYPTO_JITTERENTROPY_MEMSIZE_2 + bool "2048 Bytes (default)" + + config CRYPTO_JITTERENTROPY_MEMSIZE_128 + bool "128 kBytes" + + config CRYPTO_JITTERENTROPY_MEMSIZE_1024 + bool "1024 kBytes" + + config CRYPTO_JITTERENTROPY_MEMSIZE_8192 + bool "8192 kBytes" +endchoice + +config CRYPTO_JITTERENTROPY_MEMORY_BLOCKS + int + default 64 if CRYPTO_JITTERENTROPY_MEMSIZE_2 + default 512 if CRYPTO_JITTERENTROPY_MEMSIZE_128 + default 1024 if CRYPTO_JITTERENTROPY_MEMSIZE_1024 + default 4096 if CRYPTO_JITTERENTROPY_MEMSIZE_8192 + +config CRYPTO_JITTERENTROPY_MEMORY_BLOCKSIZE + int + default 32 if CRYPTO_JITTERENTROPY_MEMSIZE_2 + default 256 if CRYPTO_JITTERENTROPY_MEMSIZE_128 + default 1024 if CRYPTO_JITTERENTROPY_MEMSIZE_1024 + default 2048 if CRYPTO_JITTERENTROPY_MEMSIZE_8192 + +config CRYPTO_JITTERENTROPY_OSR + int "CPU Jitter RNG Oversampling Rate" + range 1 15 + default 1 + depends on CRYPTO_JITTERENTROPY + help + The Jitter RNG allows the specification of an oversampling rate (OSR). + The Jitter RNG operation requires a fixed amount of timing + measurements to produce one output block of random numbers. The + OSR value is multiplied with the amount of timing measurements to + generate one output block. Thus, the timing measurement is oversampled + by the OSR factor. The oversampling allows the Jitter RNG to operate + on hardware whose timers deliver limited amount of entropy (e.g. + the timer is coarse) by setting the OSR to a higher value. The + trade-off, however, is that the Jitter RNG now requires more time + to generate random numbers. + config CRYPTO_JITTERENTROPY_TESTINTERFACE bool "CPU Jitter RNG Test Interface" depends on CRYPTO_JITTERENTROPY |