lwn.git/crypto/Kconfig, branch v4.13

crypto: ecdh - add privkey generation support

2017-06-10T04:04:35+00:00

Add support for generating ecc private keys. Generation of ecc private keys is helpful in a user-space to kernel ecdh offload because the keys are not revealed to user-space. Private key generation is also helpful to implement forward secrecy. If the user provides a NULL ecc private key, the kernel will generate it and further use it for ecdh. Move ecdh's object files below drbg's. drbg must be present in the kernel at the time of calling. Signed-off-by: Tudor Ambarus Reviewed-by: Stephan Müller Signed-off-by: Herbert Xu

crypto: xts - drop gf128mul dependency

2017-04-05T13:58:37+00:00

Since the gf128mul_x_ble function used by xts.c is now defined inline in the header file, the XTS module no longer depends on gf128mul. Therefore, the 'select CRYPTO_GF128MUL' line can be safely removed. Signed-off-by: Ondrej Mosnacek Reviewd-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: powerpc - Stress test for vpmsum implementations

2017-03-24T14:02:54+00:00

vpmsum implementations often don't kick in for short test vectors. This is a simple test module that does a configurable number of random tests, each up to 64kB and each with random offsets. Both CRC-T10DIF and CRC32C are tested. Cc: Anton Blanchard Signed-off-by: Daniel Axtens Signed-off-by: Herbert Xu

crypto: powerpc - Add CRC-T10DIF acceleration

2017-03-24T14:02:53+00:00

T10DIF is a CRC16 used heavily in NVMe. It turns out we can accelerate it with a CRC32 library and a few little tricks. Provide the accelerator based the refactored CRC32 code. Cc: Anton Blanchard Thanks-to: Hong Bo Peng Signed-off-by: Daniel Axtens Signed-off-by: Herbert Xu

crypto: xts - Add ECB dependency

2017-02-23T12:11:06+00:00

Since the commit f1c131b45410a202eb45cc55980a7a9e4e4b4f40 crypto: xts - Convert to skcipher the XTS mode is based on ECB, so the mode must select ECB otherwise it can fail to initialize. Signed-off-by: Milan Broz Signed-off-by: Herbert Xu

crypto: ccm - switch to separate cbcmac driver

2017-02-11T09:50:45+00:00

Update the generic CCM driver to defer CBC-MAC processing to a dedicated CBC-MAC ahash transform rather than open coding this transform (and much of the associated scatterwalk plumbing) in the CCM driver itself. This cleans up the code considerably, but more importantly, it allows the use of alternative CBC-MAC implementations that don't suffer from performance degradation due to significant setup time (e.g., the NEON based AES code needs to enable/disable the NEON, and load the S-box into 16 SIMD registers, which cannot be amortized over the entire input when using the cipher interface) Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: aes - add generic time invariant AES cipher

2017-02-11T09:50:43+00:00

Lookup table based AES is sensitive to timing attacks, which is due to the fact that such table lookups are data dependent, and the fact that 8 KB worth of tables covers a significant number of cachelines on any architecture, resulting in an exploitable correlation between the key and the processing time for known plaintexts. For network facing algorithms such as CTR, CCM or GCM, this presents a security risk, which is why arch specific AES ports are typically time invariant, either through the use of special instructions, or by using SIMD algorithms that don't rely on table lookups. For generic code, this is difficult to achieve without losing too much performance, but we can improve the situation significantly by switching to an implementation that only needs 256 bytes of table data (the actual S-box itself), which can be prefetched at the start of each block to eliminate data dependent latencies. This code encrypts at ~25 cycles per byte on ARM Cortex-A57 (while the ordinary generic AES driver manages 18 cycles per byte on this hardware). Decryption is substantially slower. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: aesni - Convert to skcipher

2016-11-28T13:23:20+00:00

This patch converts aesni (including fpu) over to the skcipher interface. The LRW implementation has been removed as the generic LRW code can now be used directly on top of the accelerated ECB implementation. Signed-off-by: Herbert Xu

crypto: glue_helper - Add skcipher xts helpers

2016-11-28T13:23:20+00:00

This patch adds xts helpers that use the skcipher interface rather than blkcipher. This will be used by aesni_intel. Signed-off-by: Herbert Xu

crypto: simd - Add simd skcipher helper

2016-11-28T13:23:18+00:00

This patch adds the simd skcipher helper which is meant to be a replacement for ablk helper. It replaces the underlying blkcipher interface with skcipher, and also presents the top-level algorithm as an skcipher. Signed-off-by: Herbert Xu