1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2 3 #ifndef _CRYPTO_BLAKE2B_H 4 #define _CRYPTO_BLAKE2B_H 5 6 #include <linux/bug.h> 7 #include <linux/types.h> 8 #include <linux/string.h> 9 10 struct blake2b_state { 11 /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */ 12 u64 h[8]; 13 u64 t[2]; 14 /* The true state ends here. The rest is temporary storage. */ 15 u64 f[2]; 16 }; 17 18 enum blake2b_lengths { 19 BLAKE2B_BLOCK_SIZE = 128, 20 BLAKE2B_HASH_SIZE = 64, 21 BLAKE2B_KEY_SIZE = 64, 22 BLAKE2B_STATE_SIZE = offsetof(struct blake2b_state, f), 23 BLAKE2B_DESC_SIZE = sizeof(struct blake2b_state), 24 25 BLAKE2B_160_HASH_SIZE = 20, 26 BLAKE2B_256_HASH_SIZE = 32, 27 BLAKE2B_384_HASH_SIZE = 48, 28 BLAKE2B_512_HASH_SIZE = 64, 29 }; 30 31 enum blake2b_iv { 32 BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL, 33 BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL, 34 BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL, 35 BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL, 36 BLAKE2B_IV4 = 0x510E527FADE682D1ULL, 37 BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL, 38 BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL, 39 BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL, 40 }; 41 42 static inline void __blake2b_init(struct blake2b_state *state, size_t outlen, 43 size_t keylen) 44 { 45 state->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen); 46 state->h[1] = BLAKE2B_IV1; 47 state->h[2] = BLAKE2B_IV2; 48 state->h[3] = BLAKE2B_IV3; 49 state->h[4] = BLAKE2B_IV4; 50 state->h[5] = BLAKE2B_IV5; 51 state->h[6] = BLAKE2B_IV6; 52 state->h[7] = BLAKE2B_IV7; 53 state->t[0] = 0; 54 state->t[1] = 0; 55 } 56 57 #endif /* _CRYPTO_BLAKE2B_H */ 58