1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * BLAKE2b digest algorithm, NEON accelerated 4 * 5 * Copyright 2020 Google LLC 6 */ 7 8 #include <crypto/internal/blake2b.h> 9 #include <crypto/internal/hash.h> 10 11 #include <linux/module.h> 12 #include <linux/sizes.h> 13 14 #include <asm/neon.h> 15 #include <asm/simd.h> 16 17 asmlinkage void blake2b_compress_neon(struct blake2b_state *state, 18 const u8 *block, size_t nblocks, u32 inc); 19 20 static void blake2b_compress_arch(struct blake2b_state *state, 21 const u8 *block, size_t nblocks, u32 inc) 22 { 23 do { 24 const size_t blocks = min_t(size_t, nblocks, 25 SZ_4K / BLAKE2B_BLOCK_SIZE); 26 27 kernel_neon_begin(); 28 blake2b_compress_neon(state, block, blocks, inc); 29 kernel_neon_end(); 30 31 nblocks -= blocks; 32 block += blocks * BLAKE2B_BLOCK_SIZE; 33 } while (nblocks); 34 } 35 36 static int crypto_blake2b_update_neon(struct shash_desc *desc, 37 const u8 *in, unsigned int inlen) 38 { 39 return crypto_blake2b_update_bo(desc, in, inlen, blake2b_compress_arch); 40 } 41 42 static int crypto_blake2b_finup_neon(struct shash_desc *desc, const u8 *in, 43 unsigned int inlen, u8 *out) 44 { 45 return crypto_blake2b_finup(desc, in, inlen, out, 46 blake2b_compress_arch); 47 } 48 49 #define BLAKE2B_ALG(name, driver_name, digest_size) \ 50 { \ 51 .base.cra_name = name, \ 52 .base.cra_driver_name = driver_name, \ 53 .base.cra_priority = 200, \ 54 .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY | \ 55 CRYPTO_AHASH_ALG_BLOCK_ONLY | \ 56 CRYPTO_AHASH_ALG_FINAL_NONZERO, \ 57 .base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \ 58 .base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \ 59 .base.cra_module = THIS_MODULE, \ 60 .digestsize = digest_size, \ 61 .setkey = crypto_blake2b_setkey, \ 62 .init = crypto_blake2b_init, \ 63 .update = crypto_blake2b_update_neon, \ 64 .finup = crypto_blake2b_finup_neon, \ 65 .descsize = sizeof(struct blake2b_state), \ 66 .statesize = BLAKE2B_STATE_SIZE, \ 67 } 68 69 static struct shash_alg blake2b_neon_algs[] = { 70 BLAKE2B_ALG("blake2b-160", "blake2b-160-neon", BLAKE2B_160_HASH_SIZE), 71 BLAKE2B_ALG("blake2b-256", "blake2b-256-neon", BLAKE2B_256_HASH_SIZE), 72 BLAKE2B_ALG("blake2b-384", "blake2b-384-neon", BLAKE2B_384_HASH_SIZE), 73 BLAKE2B_ALG("blake2b-512", "blake2b-512-neon", BLAKE2B_512_HASH_SIZE), 74 }; 75 76 static int __init blake2b_neon_mod_init(void) 77 { 78 if (!(elf_hwcap & HWCAP_NEON)) 79 return -ENODEV; 80 81 return crypto_register_shashes(blake2b_neon_algs, 82 ARRAY_SIZE(blake2b_neon_algs)); 83 } 84 85 static void __exit blake2b_neon_mod_exit(void) 86 { 87 crypto_unregister_shashes(blake2b_neon_algs, 88 ARRAY_SIZE(blake2b_neon_algs)); 89 } 90 91 module_init(blake2b_neon_mod_init); 92 module_exit(blake2b_neon_mod_exit); 93 94 MODULE_DESCRIPTION("BLAKE2b digest algorithm, NEON accelerated"); 95 MODULE_LICENSE("GPL"); 96 MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>"); 97 MODULE_ALIAS_CRYPTO("blake2b-160"); 98 MODULE_ALIAS_CRYPTO("blake2b-160-neon"); 99 MODULE_ALIAS_CRYPTO("blake2b-256"); 100 MODULE_ALIAS_CRYPTO("blake2b-256-neon"); 101 MODULE_ALIAS_CRYPTO("blake2b-384"); 102 MODULE_ALIAS_CRYPTO("blake2b-384-neon"); 103 MODULE_ALIAS_CRYPTO("blake2b-512"); 104 MODULE_ALIAS_CRYPTO("blake2b-512-neon"); 105