1 #ifndef BLAKE3_IMPL_H 2 #define BLAKE3_IMPL_H 3 4 #include <assert.h> 5 #include <stdbool.h> 6 #include <stddef.h> 7 #include <stdint.h> 8 #include <string.h> 9 10 #include "llvm-c/blake3.h" 11 // For \p LLVM_LIBRARY_VISIBILITY 12 #include "llvm/Support/Compiler.h" 13 14 #include "llvm_blake3_prefix.h" 15 16 // internal flags 17 enum blake3_flags { 18 CHUNK_START = 1 << 0, 19 CHUNK_END = 1 << 1, 20 PARENT = 1 << 2, 21 ROOT = 1 << 3, 22 KEYED_HASH = 1 << 4, 23 DERIVE_KEY_CONTEXT = 1 << 5, 24 DERIVE_KEY_MATERIAL = 1 << 6, 25 }; 26 27 // This C implementation tries to support recent versions of GCC, Clang, and 28 // MSVC. 29 #if defined(_MSC_VER) 30 #define INLINE static __forceinline 31 #else 32 #define INLINE static inline __attribute__((always_inline)) 33 #endif 34 35 #if defined(__x86_64__) || defined(_M_X64) 36 #define IS_X86 37 #define IS_X86_64 38 #endif 39 40 #if defined(__i386__) || defined(_M_IX86) 41 #define IS_X86 42 #define IS_X86_32 43 #endif 44 45 #if defined(__aarch64__) || defined(_M_ARM64) 46 #define IS_AARCH64 47 #endif 48 49 #if defined(IS_X86) 50 #if defined(_MSC_VER) 51 #include <intrin.h> 52 #endif 53 #include <immintrin.h> 54 #endif 55 56 #if !defined(BLAKE3_USE_NEON) 57 // If BLAKE3_USE_NEON not manually set, autodetect based on AArch64ness 58 #if defined(IS_AARCH64) 59 #define BLAKE3_USE_NEON 1 60 #else 61 #define BLAKE3_USE_NEON 0 62 #endif 63 #endif 64 65 #if defined(IS_X86) 66 #define MAX_SIMD_DEGREE 16 67 #elif BLAKE3_USE_NEON == 1 68 #define MAX_SIMD_DEGREE 4 69 #else 70 #define MAX_SIMD_DEGREE 1 71 #endif 72 73 // There are some places where we want a static size that's equal to the 74 // MAX_SIMD_DEGREE, but also at least 2. 75 #define MAX_SIMD_DEGREE_OR_2 (MAX_SIMD_DEGREE > 2 ? MAX_SIMD_DEGREE : 2) 76 77 static const uint32_t IV[8] = {0x6A09E667UL, 0xBB67AE85UL, 0x3C6EF372UL, 78 0xA54FF53AUL, 0x510E527FUL, 0x9B05688CUL, 79 0x1F83D9ABUL, 0x5BE0CD19UL}; 80 81 static const uint8_t MSG_SCHEDULE[7][16] = { 82 {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}, 83 {2, 6, 3, 10, 7, 0, 4, 13, 1, 11, 12, 5, 9, 14, 15, 8}, 84 {3, 4, 10, 12, 13, 2, 7, 14, 6, 5, 9, 0, 11, 15, 8, 1}, 85 {10, 7, 12, 9, 14, 3, 13, 15, 4, 0, 11, 2, 5, 8, 1, 6}, 86 {12, 13, 9, 11, 15, 10, 14, 8, 7, 2, 5, 3, 0, 1, 6, 4}, 87 {9, 14, 11, 5, 8, 12, 15, 1, 13, 3, 0, 10, 2, 6, 4, 7}, 88 {11, 15, 5, 0, 1, 9, 8, 6, 14, 10, 2, 12, 3, 4, 7, 13}, 89 }; 90 91 /* Find index of the highest set bit */ 92 /* x is assumed to be nonzero. */ 93 static unsigned int highest_one(uint64_t x) { 94 #if defined(__GNUC__) || defined(__clang__) 95 return 63 ^ __builtin_clzll(x); 96 #elif defined(_MSC_VER) && defined(IS_X86_64) 97 unsigned long index; 98 _BitScanReverse64(&index, x); 99 return index; 100 #elif defined(_MSC_VER) && defined(IS_X86_32) 101 if(x >> 32) { 102 unsigned long index; 103 _BitScanReverse(&index, (unsigned long)(x >> 32)); 104 return 32 + index; 105 } else { 106 unsigned long index; 107 _BitScanReverse(&index, (unsigned long)x); 108 return index; 109 } 110 #else 111 unsigned int c = 0; 112 if(x & 0xffffffff00000000ULL) { x >>= 32; c += 32; } 113 if(x & 0x00000000ffff0000ULL) { x >>= 16; c += 16; } 114 if(x & 0x000000000000ff00ULL) { x >>= 8; c += 8; } 115 if(x & 0x00000000000000f0ULL) { x >>= 4; c += 4; } 116 if(x & 0x000000000000000cULL) { x >>= 2; c += 2; } 117 if(x & 0x0000000000000002ULL) { c += 1; } 118 return c; 119 #endif 120 } 121 122 // Count the number of 1 bits. 123 INLINE unsigned int popcnt(uint64_t x) { 124 #if defined(__GNUC__) || defined(__clang__) 125 return __builtin_popcountll(x); 126 #else 127 unsigned int count = 0; 128 while (x != 0) { 129 count += 1; 130 x &= x - 1; 131 } 132 return count; 133 #endif 134 } 135 136 // Largest power of two less than or equal to x. As a special case, returns 1 137 // when x is 0. 138 INLINE uint64_t round_down_to_power_of_2(uint64_t x) { 139 return 1ULL << highest_one(x | 1); 140 } 141 142 INLINE uint32_t counter_low(uint64_t counter) { return (uint32_t)counter; } 143 144 INLINE uint32_t counter_high(uint64_t counter) { 145 return (uint32_t)(counter >> 32); 146 } 147 148 INLINE uint32_t load32(const void *src) { 149 const uint8_t *p = (const uint8_t *)src; 150 return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) | 151 ((uint32_t)(p[2]) << 16) | ((uint32_t)(p[3]) << 24); 152 } 153 154 INLINE void load_key_words(const uint8_t key[BLAKE3_KEY_LEN], 155 uint32_t key_words[8]) { 156 key_words[0] = load32(&key[0 * 4]); 157 key_words[1] = load32(&key[1 * 4]); 158 key_words[2] = load32(&key[2 * 4]); 159 key_words[3] = load32(&key[3 * 4]); 160 key_words[4] = load32(&key[4 * 4]); 161 key_words[5] = load32(&key[5 * 4]); 162 key_words[6] = load32(&key[6 * 4]); 163 key_words[7] = load32(&key[7 * 4]); 164 } 165 166 INLINE void store32(void *dst, uint32_t w) { 167 uint8_t *p = (uint8_t *)dst; 168 p[0] = (uint8_t)(w >> 0); 169 p[1] = (uint8_t)(w >> 8); 170 p[2] = (uint8_t)(w >> 16); 171 p[3] = (uint8_t)(w >> 24); 172 } 173 174 INLINE void store_cv_words(uint8_t bytes_out[32], uint32_t cv_words[8]) { 175 store32(&bytes_out[0 * 4], cv_words[0]); 176 store32(&bytes_out[1 * 4], cv_words[1]); 177 store32(&bytes_out[2 * 4], cv_words[2]); 178 store32(&bytes_out[3 * 4], cv_words[3]); 179 store32(&bytes_out[4 * 4], cv_words[4]); 180 store32(&bytes_out[5 * 4], cv_words[5]); 181 store32(&bytes_out[6 * 4], cv_words[6]); 182 store32(&bytes_out[7 * 4], cv_words[7]); 183 } 184 185 LLVM_LIBRARY_VISIBILITY 186 void blake3_compress_in_place(uint32_t cv[8], 187 const uint8_t block[BLAKE3_BLOCK_LEN], 188 uint8_t block_len, uint64_t counter, 189 uint8_t flags); 190 191 LLVM_LIBRARY_VISIBILITY 192 void blake3_compress_xof(const uint32_t cv[8], 193 const uint8_t block[BLAKE3_BLOCK_LEN], 194 uint8_t block_len, uint64_t counter, uint8_t flags, 195 uint8_t out[64]); 196 197 LLVM_LIBRARY_VISIBILITY 198 void blake3_hash_many(const uint8_t *const *inputs, size_t num_inputs, 199 size_t blocks, const uint32_t key[8], uint64_t counter, 200 bool increment_counter, uint8_t flags, 201 uint8_t flags_start, uint8_t flags_end, uint8_t *out); 202 203 LLVM_LIBRARY_VISIBILITY 204 size_t blake3_simd_degree(void); 205 206 207 // Declarations for implementation-specific functions. 208 LLVM_LIBRARY_VISIBILITY 209 void blake3_compress_in_place_portable(uint32_t cv[8], 210 const uint8_t block[BLAKE3_BLOCK_LEN], 211 uint8_t block_len, uint64_t counter, 212 uint8_t flags); 213 214 LLVM_LIBRARY_VISIBILITY 215 void blake3_compress_xof_portable(const uint32_t cv[8], 216 const uint8_t block[BLAKE3_BLOCK_LEN], 217 uint8_t block_len, uint64_t counter, 218 uint8_t flags, uint8_t out[64]); 219 220 LLVM_LIBRARY_VISIBILITY 221 void blake3_hash_many_portable(const uint8_t *const *inputs, size_t num_inputs, 222 size_t blocks, const uint32_t key[8], 223 uint64_t counter, bool increment_counter, 224 uint8_t flags, uint8_t flags_start, 225 uint8_t flags_end, uint8_t *out); 226 227 #if defined(IS_X86) 228 #if !defined(BLAKE3_NO_SSE2) 229 LLVM_LIBRARY_VISIBILITY 230 void blake3_compress_in_place_sse2(uint32_t cv[8], 231 const uint8_t block[BLAKE3_BLOCK_LEN], 232 uint8_t block_len, uint64_t counter, 233 uint8_t flags); 234 LLVM_LIBRARY_VISIBILITY 235 void blake3_compress_xof_sse2(const uint32_t cv[8], 236 const uint8_t block[BLAKE3_BLOCK_LEN], 237 uint8_t block_len, uint64_t counter, 238 uint8_t flags, uint8_t out[64]); 239 LLVM_LIBRARY_VISIBILITY 240 void blake3_hash_many_sse2(const uint8_t *const *inputs, size_t num_inputs, 241 size_t blocks, const uint32_t key[8], 242 uint64_t counter, bool increment_counter, 243 uint8_t flags, uint8_t flags_start, 244 uint8_t flags_end, uint8_t *out); 245 #endif 246 #if !defined(BLAKE3_NO_SSE41) 247 LLVM_LIBRARY_VISIBILITY 248 void blake3_compress_in_place_sse41(uint32_t cv[8], 249 const uint8_t block[BLAKE3_BLOCK_LEN], 250 uint8_t block_len, uint64_t counter, 251 uint8_t flags); 252 LLVM_LIBRARY_VISIBILITY 253 void blake3_compress_xof_sse41(const uint32_t cv[8], 254 const uint8_t block[BLAKE3_BLOCK_LEN], 255 uint8_t block_len, uint64_t counter, 256 uint8_t flags, uint8_t out[64]); 257 LLVM_LIBRARY_VISIBILITY 258 void blake3_hash_many_sse41(const uint8_t *const *inputs, size_t num_inputs, 259 size_t blocks, const uint32_t key[8], 260 uint64_t counter, bool increment_counter, 261 uint8_t flags, uint8_t flags_start, 262 uint8_t flags_end, uint8_t *out); 263 #endif 264 #if !defined(BLAKE3_NO_AVX2) 265 LLVM_LIBRARY_VISIBILITY 266 void blake3_hash_many_avx2(const uint8_t *const *inputs, size_t num_inputs, 267 size_t blocks, const uint32_t key[8], 268 uint64_t counter, bool increment_counter, 269 uint8_t flags, uint8_t flags_start, 270 uint8_t flags_end, uint8_t *out); 271 #endif 272 #if !defined(BLAKE3_NO_AVX512) 273 LLVM_LIBRARY_VISIBILITY 274 void blake3_compress_in_place_avx512(uint32_t cv[8], 275 const uint8_t block[BLAKE3_BLOCK_LEN], 276 uint8_t block_len, uint64_t counter, 277 uint8_t flags); 278 279 LLVM_LIBRARY_VISIBILITY 280 void blake3_compress_xof_avx512(const uint32_t cv[8], 281 const uint8_t block[BLAKE3_BLOCK_LEN], 282 uint8_t block_len, uint64_t counter, 283 uint8_t flags, uint8_t out[64]); 284 285 LLVM_LIBRARY_VISIBILITY 286 void blake3_hash_many_avx512(const uint8_t *const *inputs, size_t num_inputs, 287 size_t blocks, const uint32_t key[8], 288 uint64_t counter, bool increment_counter, 289 uint8_t flags, uint8_t flags_start, 290 uint8_t flags_end, uint8_t *out); 291 #endif 292 #endif 293 294 #if BLAKE3_USE_NEON == 1 295 LLVM_LIBRARY_VISIBILITY 296 void blake3_hash_many_neon(const uint8_t *const *inputs, size_t num_inputs, 297 size_t blocks, const uint32_t key[8], 298 uint64_t counter, bool increment_counter, 299 uint8_t flags, uint8_t flags_start, 300 uint8_t flags_end, uint8_t *out); 301 #endif 302 303 304 #endif /* BLAKE3_IMPL_H */ 305