- 02 Mar, 2018 13 commits
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Eric Biggers authored
The LRW template now wraps an ECB mode algorithm rather than the block cipher directly. Therefore it is now redundant for crypto modules to wrap their ECB code with generic LRW code themselves via lrw_crypt(). Remove the lrw-serpent-sse2 algorithm which did this. Users who request lrw(serpent) and previously would have gotten lrw-serpent-sse2 will now get lrw(ecb-serpent-sse2) instead, which is just as fast. Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
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Eric Biggers authored
Add ECB, CBC, and CTR functions to glue_helper which use skcipher_walk rather than blkcipher_walk. This will allow converting the remaining x86 algorithms from the blkcipher interface over to the skcipher interface, after which we'll be able to remove the blkcipher_walk versions of these functions. Signed-off-by:
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Eric Biggers authored
Add a function to crypto_simd that registers an array of skcipher algorithms, then allocates and registers the simd wrapper algorithms for them. It assumes the naming scheme where the names of the underlying algorithms are prefixed with two underscores. Also add the corresponding 'unregister' function. Most of the x86 crypto modules will be able to use these. Signed-off-by:
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Gilad Ben-Yossef authored
Replace memset to 0 followed by kfree with kzfree for simplicity. Signed-off-by:
Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by:
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Gilad Ben-Yossef authored
Add support for the legacy CryptoCell 630 and 710 revs. Signed-off-by:
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Gilad Ben-Yossef authored
Add device tree bindings for Arm CryptoCell 710 and 630p hardware revisions. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Gilad Ben-Yossef authored
Remove enum definition which are not used by the REE interface driver. Signed-off-by:
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Robin Murphy authored
The inclusion of dma-direct.h was only needed temporarily to prevent breakage from the DMA API rework, since the actual CESA fix making it redundant was merged in parallel. Now that both have landed, it can go. Signed-off-by:
Robin Murphy <robin.murphy@arm.com> Signed-off-by:
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lionel.debieve@st.com authored
Increase timeout delay to support longer timing linked to rng initialization. Measurement is based on timer instead of instructions per iteration which is not powerful on all targets. Signed-off-by:
Lionel Debieve <lionel.debieve@st.com> Signed-off-by:
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lionel.debieve@st.com authored
Add optional property to enable the clock detection error on rng block. It is used to allow slow clock source which give correct entropy for rng. Signed-off-by:
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lionel.debieve@st.com authored
Add a new property that allow to disable the clock error detection which is required when the clock source selected is out of specification (which is not mandatory). Signed-off-by:
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lionel.debieve@st.com authored
Adding optional resets property for rng. Signed-off-by:
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lionel.debieve@st.com authored
Avoid issue when probing the RNG without reset if bad status has been detected previously Signed-off-by:
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- 22 Feb, 2018 27 commits
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Fengguang Wu authored
drivers/crypto/ccree/cc_cipher.c:629:15-22: WARNING opportunity for kmemdep Use kmemdup rather than duplicating its implementation Generated by: scripts/coccinelle/api/memdup.cocci Fixes: 63ee04c8 ("crypto: ccree - add skcipher support") CC: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
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Markus Elfring authored
Omit extra messages for a memory allocation failure in these functions. This issue was detected by using the Coccinelle software. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Reviewed-by:
Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by:
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Markus Elfring authored
Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
crypto: bfin_crc - Delete an error message for a failed memory allocation in bfin_crypto_crc_probe() Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by:
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Eric Biggers authored
Add test vectors for Speck64-XTS, generated in userspace using C code. The inputs were borrowed from the AES-XTS test vectors, with key lengths adjusted. xts-speck64-neon passes these tests. However, they aren't currently applicable for the generic XTS template, as that only supports a 128-bit block size. Signed-off-by:
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Eric Biggers authored
Add test vectors for Speck128-XTS, generated in userspace using C code. The inputs were borrowed from the AES-XTS test vectors. Both xts(speck128-generic) and xts-speck128-neon pass these tests. Signed-off-by:
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Eric Biggers authored
Add an ARM NEON-accelerated implementation of Speck-XTS. It operates on 128-byte chunks at a time, i.e. 8 blocks for Speck128 or 16 blocks for Speck64. Each 128-byte chunk goes through XTS preprocessing, then is encrypted/decrypted (doing one cipher round for all the blocks, then the next round, etc.), then goes through XTS postprocessing. The performance depends on the processor but can be about 3 times faster than the generic code. For example, on an ARMv7 processor we observe the following performance with Speck128/256-XTS: xts-speck128-neon: Encryption 107.9 MB/s, Decryption 108.1 MB/s xts(speck128-generic): Encryption 32.1 MB/s, Decryption 36.6 MB/s In comparison to AES-256-XTS without the Cryptography Extensions: xts-aes-neonbs: Encryption 41.2 MB/s, Decryption 36.7 MB/s xts(aes-asm): Encryption 31.7 MB/s, Decryption 30.8 MB/s xts(aes-generic): Encryption 21.2 MB/s, Decryption 20.9 MB/s Speck64/128-XTS is even faster: xts-speck64-neon: Encryption 138.6 MB/s, Decryption 139.1 MB/s Note that as with the generic code, only the Speck128 and Speck64 variants are supported. Also, for now only the XTS mode of operation is supported, to target the disk and file encryption use cases. The NEON code also only handles the portion of the data that is evenly divisible into 128-byte chunks, with any remainder handled by a C fallback. Of course, other modes of operation could be added later if needed, and/or the NEON code could be updated to handle other buffer sizes. The XTS specification is only defined for AES which has a 128-bit block size, so for the GF(2^64) math needed for Speck64-XTS we use the reducing polynomial 'x^64 + x^4 + x^3 + x + 1' given by the original XEX paper. Of course, when possible users should use Speck128-XTS, but even that may be too slow on some processors; Speck64-XTS can be faster. Signed-off-by: -
Eric Biggers authored
Export the Speck constants and transform context and the ->setkey(), ->encrypt(), and ->decrypt() functions so that they can be reused by the ARM NEON implementation of Speck-XTS. The generic key expansion code will be reused because it is not performance-critical and is not vectorizable, while the generic encryption and decryption functions are needed as fallbacks and for the XTS tweak encryption. Signed-off-by:
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Eric Biggers authored
Add a generic implementation of Speck, including the Speck128 and Speck64 variants. Speck is a lightweight block cipher that can be much faster than AES on processors that don't have AES instructions. We are planning to offer Speck-XTS (probably Speck128/256-XTS) as an option for dm-crypt and fscrypt on Android, for low-end mobile devices with older CPUs such as ARMv7 which don't have the Cryptography Extensions. Currently, such devices are unencrypted because AES is not fast enough, even when the NEON bit-sliced implementation of AES is used. Other AES alternatives such as Twofish, Threefish, Camellia, CAST6, and Serpent aren't fast enough either; it seems that only a modern ARX cipher can provide sufficient performance on these devices. This is a replacement for our original proposal (https://patchwork.kernel.org/patch/10101451/) which was to offer ChaCha20 for these devices. However, the use of a stream cipher for disk/file encryption with no space to store nonces would have been much more insecure than we thought initially, given that it would be used on top of flash storage as well as potentially on top of F2FS, neither of which is guaranteed to overwrite data in-place. Speck has been somewhat controversial due to its origin. Nevertheless, it has a straightforward design (it's an ARX cipher), and it appears to be the leading software-optimized lightweight block cipher currently, with the most cryptanalysis. It's also easy to implement without side channels, unlike AES. Moreover, we only intend Speck to be used when the status quo is no encryption, due to AES not being fast enough. We've also considered a novel length-preserving encryption mode based on ChaCha20 and Poly1305. While theoretically attractive, such a mode would be a brand new crypto construction and would be more complicated and difficult to implement efficiently in comparison to Speck-XTS. There is confusion about the byte and word orders of Speck, since the original paper doesn't specify them. But we have implemented it using the orders the authors recommended in a correspondence with them. The test vectors are taken from the original paper but were mapped to byte arrays using the recommended byte and word orders. Signed-off-by:
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Dave Watson authored
Add gcmaes_crypt_by_sg routine, that will do scatter/gather by sg. Either src or dst may contain multiple buffers, so iterate over both at the same time if they are different. If the input is the same as the output, iterate only over one. Currently both the AAD and TAG must be linear, so copy them out with scatterlist_map_and_copy. If first buffer contains the entire AAD, we can optimize and not copy. Since the AAD can be any size, if copied it must be on the heap. TAG can be on the stack since it is always < 16 bytes. Only the SSE routines are updated so far, so leave the previous gcmaes_en/decrypt routines, and branch to the sg ones if the keysize is inappropriate for avx, or we are SSE only. Signed-off-by:
Dave Watson <davejwatson@fb.com> Signed-off-by:
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Dave Watson authored
The asm macros are all set up now, introduce entry points. GCM_INIT and GCM_COMPLETE have arguments supplied, so that the new scatter/gather entry points don't have to take all the arguments, and only the ones they need. Signed-off-by:
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Dave Watson authored
We can fast-path any < 16 byte read if the full message is > 16 bytes, and shift over by the appropriate amount. Usually we are reading > 16 bytes, so this should be faster than the READ_PARTIAL macro introduced in b20209c9 for the average case. Signed-off-by:
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Dave Watson authored
Before this diff, multiple calls to GCM_ENC_DEC will succeed, but only if all calls are a multiple of 16 bytes. Handle partial blocks at the start of GCM_ENC_DEC, and update aadhash as appropriate. The data offset %r11 is also updated after the partial block. Signed-off-by:
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Dave Watson authored
HashKey computation only needs to happen once per scatter/gather operation, save it between calls in gcm_context struct instead of on the stack. Since the asm no longer stores anything on the stack, we can use %rsp directly, and clean up the frame save/restore macros a bit. Hashkeys actually only need to be calculated once per key and could be moved to when set_key is called, however, the current glue code falls back to generic aes code if fpu is disabled. Signed-off-by:
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Dave Watson authored
Prepare to handle partial blocks between scatter/gather calls. For the last partial block, we only want to calculate the aadhash in GCM_COMPLETE, and a new partial block macro will handle both aadhash update and encrypting partial blocks between calls. Signed-off-by:
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Dave Watson authored
Fill in aadhash, aadlen, pblocklen, curcount with appropriate values. pblocklen, aadhash, and pblockenckey are also updated at the end of each scatter/gather operation, to be carried over to the next operation. Signed-off-by:
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Dave Watson authored
AAD hash only needs to be calculated once for each scatter/gather operation. Move it to its own macro, and call it from GCM_INIT instead of INITIAL_BLOCKS. Signed-off-by:
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Dave Watson authored
Introduce a gcm_context_data struct that will be used to pass context data between scatter/gather update calls. It is passed as the second argument (after crypto keys), other args are renumbered. Signed-off-by:
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Dave Watson authored
Make a macro for the main encode/decode routine. Only a small handful of lines differ for enc and dec. This will also become the main scatter/gather update routine. Signed-off-by:
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Dave Watson authored
Merge encode and decode tag calculations in GCM_COMPLETE macro. Scatter/gather routines will call this once at the end of encryption or decryption. Signed-off-by:
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Dave Watson authored
Reduce code duplication by introducting GCM_INIT macro. This macro will also be exposed as a function for implementing scatter/gather support, since INIT only needs to be called once for the full operation. Signed-off-by:
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Dave Watson authored
Macro-ify function save and restore. These will be used in new functions added for scatter/gather update operations. Signed-off-by:
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Dave Watson authored
Use macro operations to merge implemetations of INITIAL_BLOCKS, since they differ by only a small handful of lines. Use macro counter \@ to simplify implementation. Signed-off-by:
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Markus Elfring authored
Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by:
Dan Streetman <ddstreet@ieee.org> Signed-off-by:
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Markus Elfring authored
Replace the specification of a data structure by a pointer dereference as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer according to the Linux coding style convention. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
Two local variables will eventually be set to appropriate pointers a bit later. Thus omit their explicit initialisation at the beginning. Signed-off-by:
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