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Diffstat (limited to 'src/crypto/siphash24.c')
| -rw-r--r-- | src/crypto/siphash24.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/crypto/siphash24.c b/src/crypto/siphash24.c new file mode 100644 index 0000000..093c837 --- /dev/null +++ b/src/crypto/siphash24.c @@ -0,0 +1,155 @@ +/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */ + +#include "../wireguard.h" +#include "siphash24.h" +#include <linux/kernel.h> + +#define ROTL(x,b) (uint64_t)(((x) << (b)) | ((x) >> (64 - (b)))) +#define U8TO64(p) le64_to_cpu(*(__le64 *)(p)) + +#define SIPROUND \ + do { \ + v0 += v1; v1 = ROTL(v1, 13); v1 ^= v0; v0 = ROTL(v0, 32); \ + v2 += v3; v3 = ROTL(v3, 16); v3 ^= v2; \ + v0 += v3; v3 = ROTL(v3, 21); v3 ^= v0; \ + v2 += v1; v1 = ROTL(v1, 17); v1 ^= v2; v2 = ROTL(v2, 32); \ + } while(0) + +__attribute__((optimize("unroll-loops"))) +uint64_t siphash24(const uint8_t *data, size_t len, const uint8_t key[SIPHASH24_KEY_LEN]) +{ + uint64_t v0 = 0x736f6d6570736575ULL; + uint64_t v1 = 0x646f72616e646f6dULL; + uint64_t v2 = 0x6c7967656e657261ULL; + uint64_t v3 = 0x7465646279746573ULL; + uint64_t b; + uint64_t k0 = U8TO64(key); + uint64_t k1 = U8TO64(key + sizeof(uint64_t)); + uint64_t m; + const uint8_t *end = data + len - (len % sizeof(uint64_t)); + const uint8_t left = len & (sizeof(uint64_t) - 1); + b = ((uint64_t)len) << 56; + v3 ^= k1; + v2 ^= k0; + v1 ^= k1; + v0 ^= k0; + for (; data != end; data += sizeof(uint64_t)) { + m = U8TO64(data); + v3 ^= m; + SIPROUND; + SIPROUND; + v0 ^= m; + } + switch (left) { + case 7: b |= ((uint64_t)data[6]) << 48; + case 6: b |= ((uint64_t)data[5]) << 40; + case 5: b |= ((uint64_t)data[4]) << 32; + case 4: b |= ((uint64_t)data[3]) << 24; + case 3: b |= ((uint64_t)data[2]) << 16; + case 2: b |= ((uint64_t)data[1]) << 8; + case 1: b |= ((uint64_t)data[0]); break; + case 0: break; + } + v3 ^= b; + SIPROUND; + SIPROUND; + v0 ^= b; + v2 ^= 0xff; + SIPROUND; + SIPROUND; + SIPROUND; + SIPROUND; + b = (v0 ^ v1) ^ (v2 ^ v3); + return (__force uint64_t)cpu_to_le64(b); +} + +#ifdef DEBUG +static const uint8_t test_vectors[64][8] = { + { 0x31, 0x0e, 0x0e, 0xdd, 0x47, 0xdb, 0x6f, 0x72 }, + { 0xfd, 0x67, 0xdc, 0x93, 0xc5, 0x39, 0xf8, 0x74 }, + { 0x5a, 0x4f, 0xa9, 0xd9, 0x09, 0x80, 0x6c, 0x0d }, + { 0x2d, 0x7e, 0xfb, 0xd7, 0x96, 0x66, 0x67, 0x85 }, + { 0xb7, 0x87, 0x71, 0x27, 0xe0, 0x94, 0x27, 0xcf }, + { 0x8d, 0xa6, 0x99, 0xcd, 0x64, 0x55, 0x76, 0x18 }, + { 0xce, 0xe3, 0xfe, 0x58, 0x6e, 0x46, 0xc9, 0xcb }, + { 0x37, 0xd1, 0x01, 0x8b, 0xf5, 0x00, 0x02, 0xab }, + { 0x62, 0x24, 0x93, 0x9a, 0x79, 0xf5, 0xf5, 0x93 }, + { 0xb0, 0xe4, 0xa9, 0x0b, 0xdf, 0x82, 0x00, 0x9e }, + { 0xf3, 0xb9, 0xdd, 0x94, 0xc5, 0xbb, 0x5d, 0x7a }, + { 0xa7, 0xad, 0x6b, 0x22, 0x46, 0x2f, 0xb3, 0xf4 }, + { 0xfb, 0xe5, 0x0e, 0x86, 0xbc, 0x8f, 0x1e, 0x75 }, + { 0x90, 0x3d, 0x84, 0xc0, 0x27, 0x56, 0xea, 0x14 }, + { 0xee, 0xf2, 0x7a, 0x8e, 0x90, 0xca, 0x23, 0xf7 }, + { 0xe5, 0x45, 0xbe, 0x49, 0x61, 0xca, 0x29, 0xa1 }, + { 0xdb, 0x9b, 0xc2, 0x57, 0x7f, 0xcc, 0x2a, 0x3f }, + { 0x94, 0x47, 0xbe, 0x2c, 0xf5, 0xe9, 0x9a, 0x69 }, + { 0x9c, 0xd3, 0x8d, 0x96, 0xf0, 0xb3, 0xc1, 0x4b }, + { 0xbd, 0x61, 0x79, 0xa7, 0x1d, 0xc9, 0x6d, 0xbb }, + { 0x98, 0xee, 0xa2, 0x1a, 0xf2, 0x5c, 0xd6, 0xbe }, + { 0xc7, 0x67, 0x3b, 0x2e, 0xb0, 0xcb, 0xf2, 0xd0 }, + { 0x88, 0x3e, 0xa3, 0xe3, 0x95, 0x67, 0x53, 0x93 }, + { 0xc8, 0xce, 0x5c, 0xcd, 0x8c, 0x03, 0x0c, 0xa8 }, + { 0x94, 0xaf, 0x49, 0xf6, 0xc6, 0x50, 0xad, 0xb8 }, + { 0xea, 0xb8, 0x85, 0x8a, 0xde, 0x92, 0xe1, 0xbc }, + { 0xf3, 0x15, 0xbb, 0x5b, 0xb8, 0x35, 0xd8, 0x17 }, + { 0xad, 0xcf, 0x6b, 0x07, 0x63, 0x61, 0x2e, 0x2f }, + { 0xa5, 0xc9, 0x1d, 0xa7, 0xac, 0xaa, 0x4d, 0xde }, + { 0x71, 0x65, 0x95, 0x87, 0x66, 0x50, 0xa2, 0xa6 }, + { 0x28, 0xef, 0x49, 0x5c, 0x53, 0xa3, 0x87, 0xad }, + { 0x42, 0xc3, 0x41, 0xd8, 0xfa, 0x92, 0xd8, 0x32 }, + { 0xce, 0x7c, 0xf2, 0x72, 0x2f, 0x51, 0x27, 0x71 }, + { 0xe3, 0x78, 0x59, 0xf9, 0x46, 0x23, 0xf3, 0xa7 }, + { 0x38, 0x12, 0x05, 0xbb, 0x1a, 0xb0, 0xe0, 0x12 }, + { 0xae, 0x97, 0xa1, 0x0f, 0xd4, 0x34, 0xe0, 0x15 }, + { 0xb4, 0xa3, 0x15, 0x08, 0xbe, 0xff, 0x4d, 0x31 }, + { 0x81, 0x39, 0x62, 0x29, 0xf0, 0x90, 0x79, 0x02 }, + { 0x4d, 0x0c, 0xf4, 0x9e, 0xe5, 0xd4, 0xdc, 0xca }, + { 0x5c, 0x73, 0x33, 0x6a, 0x76, 0xd8, 0xbf, 0x9a }, + { 0xd0, 0xa7, 0x04, 0x53, 0x6b, 0xa9, 0x3e, 0x0e }, + { 0x92, 0x59, 0x58, 0xfc, 0xd6, 0x42, 0x0c, 0xad }, + { 0xa9, 0x15, 0xc2, 0x9b, 0xc8, 0x06, 0x73, 0x18 }, + { 0x95, 0x2b, 0x79, 0xf3, 0xbc, 0x0a, 0xa6, 0xd4 }, + { 0xf2, 0x1d, 0xf2, 0xe4, 0x1d, 0x45, 0x35, 0xf9 }, + { 0x87, 0x57, 0x75, 0x19, 0x04, 0x8f, 0x53, 0xa9 }, + { 0x10, 0xa5, 0x6c, 0xf5, 0xdf, 0xcd, 0x9a, 0xdb }, + { 0xeb, 0x75, 0x09, 0x5c, 0xcd, 0x98, 0x6c, 0xd0 }, + { 0x51, 0xa9, 0xcb, 0x9e, 0xcb, 0xa3, 0x12, 0xe6 }, + { 0x96, 0xaf, 0xad, 0xfc, 0x2c, 0xe6, 0x66, 0xc7 }, + { 0x72, 0xfe, 0x52, 0x97, 0x5a, 0x43, 0x64, 0xee }, + { 0x5a, 0x16, 0x45, 0xb2, 0x76, 0xd5, 0x92, 0xa1 }, + { 0xb2, 0x74, 0xcb, 0x8e, 0xbf, 0x87, 0x87, 0x0a }, + { 0x6f, 0x9b, 0xb4, 0x20, 0x3d, 0xe7, 0xb3, 0x81 }, + { 0xea, 0xec, 0xb2, 0xa3, 0x0b, 0x22, 0xa8, 0x7f }, + { 0x99, 0x24, 0xa4, 0x3c, 0xc1, 0x31, 0x57, 0x24 }, + { 0xbd, 0x83, 0x8d, 0x3a, 0xaf, 0xbf, 0x8d, 0xb7 }, + { 0x0b, 0x1a, 0x2a, 0x32, 0x65, 0xd5, 0x1a, 0xea }, + { 0x13, 0x50, 0x79, 0xa3, 0x23, 0x1c, 0xe6, 0x60 }, + { 0x93, 0x2b, 0x28, 0x46, 0xe4, 0xd7, 0x06, 0x66 }, + { 0xe1, 0x91, 0x5f, 0x5c, 0xb1, 0xec, 0xa4, 0x6c }, + { 0xf3, 0x25, 0x96, 0x5c, 0xa1, 0x6d, 0x62, 0x9f }, + { 0x57, 0x5f, 0xf2, 0x8e, 0x60, 0x38, 0x1b, 0xe5 }, + { 0x72, 0x45, 0x06, 0xeb, 0x4c, 0x32, 0x8a, 0x95 } +}; + +void siphash24_selftest(void) +{ + uint8_t in[64], k[16]; + uint64_t out; + bool success = true; + size_t i; + + for (i = 0; i < 16; ++i) + k[i] = (uint8_t)i; + + for (i = 0; i < 64; ++i) { + in[i] = (uint8_t)i; + out = siphash24(in, i, k); + if (memcmp(&out, test_vectors[i], 8)) { + pr_info("siphash24 self-test %zu: FAIL\n", i + 1); + success = false; + } + } + if (success) + pr_info("siphash24 self-tests: pass\n"); +} +#endif |