mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
4d2fa8b44b
Pull crypto updates from Herbert Xu: "Here is the crypto update for 5.3: API: - Test shash interface directly in testmgr - cra_driver_name is now mandatory Algorithms: - Replace arc4 crypto_cipher with library helper - Implement 5 way interleave for ECB, CBC and CTR on arm64 - Add xxhash - Add continuous self-test on noise source to drbg - Update jitter RNG Drivers: - Add support for SHA204A random number generator - Add support for 7211 in iproc-rng200 - Fix fuzz test failures in inside-secure - Fix fuzz test failures in talitos - Fix fuzz test failures in qat" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (143 commits) crypto: stm32/hash - remove interruptible condition for dma crypto: stm32/hash - Fix hmac issue more than 256 bytes crypto: stm32/crc32 - rename driver file crypto: amcc - remove memset after dma_alloc_coherent crypto: ccp - Switch to SPDX license identifiers crypto: ccp - Validate the the error value used to index error messages crypto: doc - Fix formatting of new crypto engine content crypto: doc - Add parameter documentation crypto: arm64/aes-ce - implement 5 way interleave for ECB, CBC and CTR crypto: arm64/aes-ce - add 5 way interleave routines crypto: talitos - drop icv_ool crypto: talitos - fix hash on SEC1. crypto: talitos - move struct talitos_edesc into talitos.h lib/scatterlist: Fix mapping iterator when sg->offset is greater than PAGE_SIZE crypto/NX: Set receive window credits to max number of CRBs in RxFIFO crypto: asymmetric_keys - select CRYPTO_HASH where needed crypto: serpent - mark __serpent_setkey_sbox noinline crypto: testmgr - dynamically allocate crypto_shash crypto: testmgr - dynamically allocate testvec_config crypto: talitos - eliminate unneeded 'done' functions at build time ...
301 lines
8.3 KiB
C
301 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* x64 SIMD accelerated ChaCha and XChaCha stream ciphers,
|
|
* including ChaCha20 (RFC7539)
|
|
*
|
|
* Copyright (C) 2015 Martin Willi
|
|
*/
|
|
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/chacha.h>
|
|
#include <crypto/internal/simd.h>
|
|
#include <crypto/internal/skcipher.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <asm/simd.h>
|
|
|
|
#define CHACHA_STATE_ALIGN 16
|
|
|
|
asmlinkage void chacha_block_xor_ssse3(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
asmlinkage void chacha_4block_xor_ssse3(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
asmlinkage void hchacha_block_ssse3(const u32 *state, u32 *out, int nrounds);
|
|
#ifdef CONFIG_AS_AVX2
|
|
asmlinkage void chacha_2block_xor_avx2(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
asmlinkage void chacha_4block_xor_avx2(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
asmlinkage void chacha_8block_xor_avx2(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
static bool chacha_use_avx2;
|
|
#ifdef CONFIG_AS_AVX512
|
|
asmlinkage void chacha_2block_xor_avx512vl(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
asmlinkage void chacha_4block_xor_avx512vl(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
asmlinkage void chacha_8block_xor_avx512vl(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int len, int nrounds);
|
|
static bool chacha_use_avx512vl;
|
|
#endif
|
|
#endif
|
|
|
|
static unsigned int chacha_advance(unsigned int len, unsigned int maxblocks)
|
|
{
|
|
len = min(len, maxblocks * CHACHA_BLOCK_SIZE);
|
|
return round_up(len, CHACHA_BLOCK_SIZE) / CHACHA_BLOCK_SIZE;
|
|
}
|
|
|
|
static void chacha_dosimd(u32 *state, u8 *dst, const u8 *src,
|
|
unsigned int bytes, int nrounds)
|
|
{
|
|
#ifdef CONFIG_AS_AVX2
|
|
#ifdef CONFIG_AS_AVX512
|
|
if (chacha_use_avx512vl) {
|
|
while (bytes >= CHACHA_BLOCK_SIZE * 8) {
|
|
chacha_8block_xor_avx512vl(state, dst, src, bytes,
|
|
nrounds);
|
|
bytes -= CHACHA_BLOCK_SIZE * 8;
|
|
src += CHACHA_BLOCK_SIZE * 8;
|
|
dst += CHACHA_BLOCK_SIZE * 8;
|
|
state[12] += 8;
|
|
}
|
|
if (bytes > CHACHA_BLOCK_SIZE * 4) {
|
|
chacha_8block_xor_avx512vl(state, dst, src, bytes,
|
|
nrounds);
|
|
state[12] += chacha_advance(bytes, 8);
|
|
return;
|
|
}
|
|
if (bytes > CHACHA_BLOCK_SIZE * 2) {
|
|
chacha_4block_xor_avx512vl(state, dst, src, bytes,
|
|
nrounds);
|
|
state[12] += chacha_advance(bytes, 4);
|
|
return;
|
|
}
|
|
if (bytes) {
|
|
chacha_2block_xor_avx512vl(state, dst, src, bytes,
|
|
nrounds);
|
|
state[12] += chacha_advance(bytes, 2);
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
if (chacha_use_avx2) {
|
|
while (bytes >= CHACHA_BLOCK_SIZE * 8) {
|
|
chacha_8block_xor_avx2(state, dst, src, bytes, nrounds);
|
|
bytes -= CHACHA_BLOCK_SIZE * 8;
|
|
src += CHACHA_BLOCK_SIZE * 8;
|
|
dst += CHACHA_BLOCK_SIZE * 8;
|
|
state[12] += 8;
|
|
}
|
|
if (bytes > CHACHA_BLOCK_SIZE * 4) {
|
|
chacha_8block_xor_avx2(state, dst, src, bytes, nrounds);
|
|
state[12] += chacha_advance(bytes, 8);
|
|
return;
|
|
}
|
|
if (bytes > CHACHA_BLOCK_SIZE * 2) {
|
|
chacha_4block_xor_avx2(state, dst, src, bytes, nrounds);
|
|
state[12] += chacha_advance(bytes, 4);
|
|
return;
|
|
}
|
|
if (bytes > CHACHA_BLOCK_SIZE) {
|
|
chacha_2block_xor_avx2(state, dst, src, bytes, nrounds);
|
|
state[12] += chacha_advance(bytes, 2);
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
while (bytes >= CHACHA_BLOCK_SIZE * 4) {
|
|
chacha_4block_xor_ssse3(state, dst, src, bytes, nrounds);
|
|
bytes -= CHACHA_BLOCK_SIZE * 4;
|
|
src += CHACHA_BLOCK_SIZE * 4;
|
|
dst += CHACHA_BLOCK_SIZE * 4;
|
|
state[12] += 4;
|
|
}
|
|
if (bytes > CHACHA_BLOCK_SIZE) {
|
|
chacha_4block_xor_ssse3(state, dst, src, bytes, nrounds);
|
|
state[12] += chacha_advance(bytes, 4);
|
|
return;
|
|
}
|
|
if (bytes) {
|
|
chacha_block_xor_ssse3(state, dst, src, bytes, nrounds);
|
|
state[12]++;
|
|
}
|
|
}
|
|
|
|
static int chacha_simd_stream_xor(struct skcipher_walk *walk,
|
|
const struct chacha_ctx *ctx, const u8 *iv)
|
|
{
|
|
u32 *state, state_buf[16 + 2] __aligned(8);
|
|
int next_yield = 4096; /* bytes until next FPU yield */
|
|
int err = 0;
|
|
|
|
BUILD_BUG_ON(CHACHA_STATE_ALIGN != 16);
|
|
state = PTR_ALIGN(state_buf + 0, CHACHA_STATE_ALIGN);
|
|
|
|
crypto_chacha_init(state, ctx, iv);
|
|
|
|
while (walk->nbytes > 0) {
|
|
unsigned int nbytes = walk->nbytes;
|
|
|
|
if (nbytes < walk->total) {
|
|
nbytes = round_down(nbytes, walk->stride);
|
|
next_yield -= nbytes;
|
|
}
|
|
|
|
chacha_dosimd(state, walk->dst.virt.addr, walk->src.virt.addr,
|
|
nbytes, ctx->nrounds);
|
|
|
|
if (next_yield <= 0) {
|
|
/* temporarily allow preemption */
|
|
kernel_fpu_end();
|
|
kernel_fpu_begin();
|
|
next_yield = 4096;
|
|
}
|
|
|
|
err = skcipher_walk_done(walk, walk->nbytes - nbytes);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int chacha_simd(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
struct skcipher_walk walk;
|
|
int err;
|
|
|
|
if (req->cryptlen <= CHACHA_BLOCK_SIZE || !crypto_simd_usable())
|
|
return crypto_chacha_crypt(req);
|
|
|
|
err = skcipher_walk_virt(&walk, req, true);
|
|
if (err)
|
|
return err;
|
|
|
|
kernel_fpu_begin();
|
|
err = chacha_simd_stream_xor(&walk, ctx, req->iv);
|
|
kernel_fpu_end();
|
|
return err;
|
|
}
|
|
|
|
static int xchacha_simd(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
struct skcipher_walk walk;
|
|
struct chacha_ctx subctx;
|
|
u32 *state, state_buf[16 + 2] __aligned(8);
|
|
u8 real_iv[16];
|
|
int err;
|
|
|
|
if (req->cryptlen <= CHACHA_BLOCK_SIZE || !crypto_simd_usable())
|
|
return crypto_xchacha_crypt(req);
|
|
|
|
err = skcipher_walk_virt(&walk, req, true);
|
|
if (err)
|
|
return err;
|
|
|
|
BUILD_BUG_ON(CHACHA_STATE_ALIGN != 16);
|
|
state = PTR_ALIGN(state_buf + 0, CHACHA_STATE_ALIGN);
|
|
crypto_chacha_init(state, ctx, req->iv);
|
|
|
|
kernel_fpu_begin();
|
|
|
|
hchacha_block_ssse3(state, subctx.key, ctx->nrounds);
|
|
subctx.nrounds = ctx->nrounds;
|
|
|
|
memcpy(&real_iv[0], req->iv + 24, 8);
|
|
memcpy(&real_iv[8], req->iv + 16, 8);
|
|
err = chacha_simd_stream_xor(&walk, &subctx, real_iv);
|
|
|
|
kernel_fpu_end();
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct skcipher_alg algs[] = {
|
|
{
|
|
.base.cra_name = "chacha20",
|
|
.base.cra_driver_name = "chacha20-simd",
|
|
.base.cra_priority = 300,
|
|
.base.cra_blocksize = 1,
|
|
.base.cra_ctxsize = sizeof(struct chacha_ctx),
|
|
.base.cra_module = THIS_MODULE,
|
|
|
|
.min_keysize = CHACHA_KEY_SIZE,
|
|
.max_keysize = CHACHA_KEY_SIZE,
|
|
.ivsize = CHACHA_IV_SIZE,
|
|
.chunksize = CHACHA_BLOCK_SIZE,
|
|
.setkey = crypto_chacha20_setkey,
|
|
.encrypt = chacha_simd,
|
|
.decrypt = chacha_simd,
|
|
}, {
|
|
.base.cra_name = "xchacha20",
|
|
.base.cra_driver_name = "xchacha20-simd",
|
|
.base.cra_priority = 300,
|
|
.base.cra_blocksize = 1,
|
|
.base.cra_ctxsize = sizeof(struct chacha_ctx),
|
|
.base.cra_module = THIS_MODULE,
|
|
|
|
.min_keysize = CHACHA_KEY_SIZE,
|
|
.max_keysize = CHACHA_KEY_SIZE,
|
|
.ivsize = XCHACHA_IV_SIZE,
|
|
.chunksize = CHACHA_BLOCK_SIZE,
|
|
.setkey = crypto_chacha20_setkey,
|
|
.encrypt = xchacha_simd,
|
|
.decrypt = xchacha_simd,
|
|
}, {
|
|
.base.cra_name = "xchacha12",
|
|
.base.cra_driver_name = "xchacha12-simd",
|
|
.base.cra_priority = 300,
|
|
.base.cra_blocksize = 1,
|
|
.base.cra_ctxsize = sizeof(struct chacha_ctx),
|
|
.base.cra_module = THIS_MODULE,
|
|
|
|
.min_keysize = CHACHA_KEY_SIZE,
|
|
.max_keysize = CHACHA_KEY_SIZE,
|
|
.ivsize = XCHACHA_IV_SIZE,
|
|
.chunksize = CHACHA_BLOCK_SIZE,
|
|
.setkey = crypto_chacha12_setkey,
|
|
.encrypt = xchacha_simd,
|
|
.decrypt = xchacha_simd,
|
|
},
|
|
};
|
|
|
|
static int __init chacha_simd_mod_init(void)
|
|
{
|
|
if (!boot_cpu_has(X86_FEATURE_SSSE3))
|
|
return -ENODEV;
|
|
|
|
#ifdef CONFIG_AS_AVX2
|
|
chacha_use_avx2 = boot_cpu_has(X86_FEATURE_AVX) &&
|
|
boot_cpu_has(X86_FEATURE_AVX2) &&
|
|
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
|
|
#ifdef CONFIG_AS_AVX512
|
|
chacha_use_avx512vl = chacha_use_avx2 &&
|
|
boot_cpu_has(X86_FEATURE_AVX512VL) &&
|
|
boot_cpu_has(X86_FEATURE_AVX512BW); /* kmovq */
|
|
#endif
|
|
#endif
|
|
return crypto_register_skciphers(algs, ARRAY_SIZE(algs));
|
|
}
|
|
|
|
static void __exit chacha_simd_mod_fini(void)
|
|
{
|
|
crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
|
|
}
|
|
|
|
module_init(chacha_simd_mod_init);
|
|
module_exit(chacha_simd_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");
|
|
MODULE_DESCRIPTION("ChaCha and XChaCha stream ciphers (x64 SIMD accelerated)");
|
|
MODULE_ALIAS_CRYPTO("chacha20");
|
|
MODULE_ALIAS_CRYPTO("chacha20-simd");
|
|
MODULE_ALIAS_CRYPTO("xchacha20");
|
|
MODULE_ALIAS_CRYPTO("xchacha20-simd");
|
|
MODULE_ALIAS_CRYPTO("xchacha12");
|
|
MODULE_ALIAS_CRYPTO("xchacha12-simd");
|