diff options
author | Vsevolod Stakhov <vsevolod@highsecure.ru> | 2015-02-21 22:28:54 +0000 |
---|---|---|
committer | Vsevolod Stakhov <vsevolod@highsecure.ru> | 2015-02-21 22:28:54 +0000 |
commit | 32d054c31888e6eb9f4e449e4c237142d4042b7f (patch) | |
tree | 9e7a619f6f63b99e5139e1fee81605ec9e2ff29d /contrib/libottery | |
parent | d0f501c2309b84c3d05a68d82f87c5af165b34f4 (diff) | |
download | rspamd-32d054c31888e6eb9f4e449e4c237142d4042b7f.tar.gz rspamd-32d054c31888e6eb9f4e449e4c237142d4042b7f.zip |
Remove unused chacha implementation from libottery
Diffstat (limited to 'contrib/libottery')
-rw-r--r-- | contrib/libottery/chacha_krovetz.c | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/contrib/libottery/chacha_krovetz.c b/contrib/libottery/chacha_krovetz.c deleted file mode 100644 index 10517795c..000000000 --- a/contrib/libottery/chacha_krovetz.c +++ /dev/null @@ -1,320 +0,0 @@ -/* - * This code is based on Ted Krovetz's ChaCha implementation; details below. - * - * Note that I've ripped out all of the code that wasn't suitable for doing - * block-oriented operation, all (residual) support for 128-bit ChaCha keys, - * all (partial) support for counter values over 32 bits, the ability to xor - * the stream with a plaintext, and so on. - * - * Future versions of this might remove bigendian conversions too. DO NOT use - * this code for your stream cipher: go back to the original source. (I got - * this copy from SUPERCOP). - */ - -/* Chacha implementation for 16-byte vectors by Ted Krovetz (ted@krovetz.net). - * Assumes 32-bit int, 64-bit long long. Public domain. Modified: 2012.07.26. - * Chacha is an improvement on the stream cipher Salsa, described at - * http://cr.yp.to/papers.html#chacha - */ -#include <string.h> -#include <assert.h> -#include "ottery-internal.h" - -/* Architecture-neutral way to specify 16-byte vector of ints */ -typedef unsigned vec __attribute__ ((vector_size (16))); - -/* This implementation is designed for Neon, SSE and AltiVec machines. The - * following specify how to do certain vector operations efficiently on - * each architecture, using intrinsics. - * This implementation supports parallel processing of multiple blocks, - * including potentially using general-purpose registers. - */ -#if __ARM_NEON__ -#include <arm_neon.h> -#define GPR_TOO 1 -#define VBPI 2 -#define ONE (vec)vsetq_lane_u32(1,vdupq_n_u32(0),0) -#define NONCE(ctr,p) (vec)vcombine_u32(vcreate_u32(ctr),vcreate_u32(*(uint64_t *)p)) -#define ROTV1(x) (vec)vextq_u32((uint32x4_t)x,(uint32x4_t)x,1) -#define ROTV2(x) (vec)vextq_u32((uint32x4_t)x,(uint32x4_t)x,2) -#define ROTV3(x) (vec)vextq_u32((uint32x4_t)x,(uint32x4_t)x,3) -#define ROTW16(x) (vec)vrev32q_u16((uint16x8_t)x) -#if __clang__ -#define ROTW7(x) (x << ((vec){ 7, 7, 7, 7})) ^ (x >> ((vec){25,25,25,25})) -#define ROTW8(x) (x << ((vec){ 8, 8, 8, 8})) ^ (x >> ((vec){24,24,24,24})) -#define ROTW12(x) (x << ((vec){12,12,12,12})) ^ (x >> ((vec){20,20,20,20})) -#else -#define ROTW7(x) (vec)vsriq_n_u32(vshlq_n_u32((uint32x4_t)x,7),(uint32x4_t)x,25) -#define ROTW8(x) (vec)vsriq_n_u32(vshlq_n_u32((uint32x4_t)x,8),(uint32x4_t)x,24) -#define ROTW12(x) (vec)vsriq_n_u32(vshlq_n_u32((uint32x4_t)x,12),(uint32x4_t)x,20) -#endif -#elif __ALTIVEC__ -#include <altivec.h> -#define GPR_TOO 1 -#define VBPI 3 -#define ONE ((vec){1,0,0,0}) -#define NONCE(ctr,p) vec_sro(*(vec *)p, (vector char)(vec){0,0,0,8*8})+((vec){((ctr)&0xffffffff), (ctr)>>32, 0, 0}) -#error "Don't use this code till it can be tested on altivec" -#define REVW_BE(x) __builtin_bswap32(x) -#define REVV_BE(x) vec_perm(x,x,(vector char){3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12}) -#define ROTV1(x) vec_perm(x,x,(vector char){4,5,6,7,8,9,10,11,12,13,14,15,0,1,2,3}) -#define ROTV2(x) vec_perm(x,x,(vector char){8,9,10,11,12,13,14,15,0,1,2,3,4,5,6,7}) -#define ROTV3(x) vec_perm(x,x,(vector char){12,13,14,15,0,1,2,3,4,5,6,7,8,9,10,11}) -#define ROTW7(x) vec_rl(x,vec_splat_u32(7)) -#define ROTW8(x) vec_rl(x,vec_splat_u32(8)) -#define ROTW12(x) vec_rl(x,vec_splat_u32(12)) -#define ROTW16(x) vec_rl(x,vec_splat_u32(-16)) /* trick to get 16 */ -#elif __SSE2__ -#include <emmintrin.h> -#define GPR_TOO 0 -#if __clang__ -#define VBPI 4 -#else -#define VBPI 3 -#endif -#define ONE (vec)_mm_set_epi32(0,0,0,1) -#define NONCE(ctr,p) (vec)(_mm_slli_si128(_mm_loadl_epi64((__m128i *)(p)),8)+_mm_set_epi64x(0,ctr)) -#define ROTV1(x) (vec)_mm_shuffle_epi32((__m128i)x,_MM_SHUFFLE(0,3,2,1)) -#define ROTV2(x) (vec)_mm_shuffle_epi32((__m128i)x,_MM_SHUFFLE(1,0,3,2)) -#define ROTV3(x) (vec)_mm_shuffle_epi32((__m128i)x,_MM_SHUFFLE(2,1,0,3)) -#define ROTW7(x) (vec)(_mm_slli_epi32((__m128i)x, 7) ^ _mm_srli_epi32((__m128i)x,25)) -#define ROTW12(x) (vec)(_mm_slli_epi32((__m128i)x,12) ^ _mm_srli_epi32((__m128i)x,20)) -#if __SSSE3__ -#include <tmmintrin.h> -#define ROTW8(x) (vec)_mm_shuffle_epi8((__m128i)x,_mm_set_epi8(14,13,12,15,10,9,8,11,6,5,4,7,2,1,0,3)) -#define ROTW16(x) (vec)_mm_shuffle_epi8((__m128i)x,_mm_set_epi8(13,12,15,14,9,8,11,10,5,4,7,6,1,0,3,2)) -#else -#define ROTW8(x) (vec)(_mm_slli_epi32((__m128i)x, 8) ^ _mm_srli_epi32((__m128i)x,24)) -#define ROTW16(x) (vec)(_mm_slli_epi32((__m128i)x,16) ^ _mm_srli_epi32((__m128i)x,16)) -#endif -#else -#error -- Implementation supports only machines with neon, altivec or SSE2 -#endif - -#ifndef REVV_BE -#define REVV_BE(x) (x) -#endif - -#ifndef REVW_BE -#define REVW_BE(x) (x) -#endif - -#define BPI (VBPI + GPR_TOO) /* Blocks computed per loop iteration */ - -#define DQROUND_VECTORS(a,b,c,d) \ - a += b; d ^= a; d = ROTW16(d); \ - c += d; b ^= c; b = ROTW12(b); \ - a += b; d ^= a; d = ROTW8(d); \ - c += d; b ^= c; b = ROTW7(b); \ - b = ROTV1(b); c = ROTV2(c); d = ROTV3(d); \ - a += b; d ^= a; d = ROTW16(d); \ - c += d; b ^= c; b = ROTW12(b); \ - a += b; d ^= a; d = ROTW8(d); \ - c += d; b ^= c; b = ROTW7(b); \ - b = ROTV3(b); c = ROTV2(c); d = ROTV1(d); - -#define QROUND_WORDS(a,b,c,d) \ - a = a+b; d ^= a; d = d<<16 | d>>16; \ - c = c+d; b ^= c; b = b<<12 | b>>20; \ - a = a+b; d ^= a; d = d<< 8 | d>>24; \ - c = c+d; b ^= c; b = b<< 7 | b>>25; - -#define WRITE(op, d, v0, v1, v2, v3) \ -*(vec *)(op + d + 0) = REVV_BE(v0); \ -*(vec *)(op + d + 4) = REVV_BE(v1); \ -*(vec *)(op + d + 8) = REVV_BE(v2); \ -*(vec *)(op + d + 12) = REVV_BE(v3); - -struct chacha_state_krovetz { - __attribute__ ((aligned (16))) uint8_t key[32]; - __attribute__ ((aligned (16))) uint8_t nonce[8]; -}; - -#define LOOP_ITERATIONS 4 - -static inline int -ottery_blocks_chacha_krovetz( - const int chacha_rounds, - uint8_t *out, - uint32_t block_idx, - struct chacha_state_krovetz *st) - __attribute__((always_inline)); - -/** Generates 64 * BPI * LOOP_ITERATIONS bytes of output using the key and - * nonce in st and the counter in block_idx, and store them in out. - */ -static inline int -ottery_blocks_chacha_krovetz( - const int chacha_rounds, - uint8_t *out, - uint32_t block_idx, - struct chacha_state_krovetz *st) -/* Assumes all pointers are aligned properly for vector reads */ -{ - const unsigned char *k = st->key; - const unsigned char *n = st->nonce; - unsigned i, j, *op=(unsigned *)out, *kp, *np; - __attribute__ ((aligned (16))) unsigned chacha_const[] = - {0x61707865,0x3320646E,0x79622D32,0x6B206574}; -#if ( __ARM_NEON__ || __SSE2__) - kp = (unsigned *)k; - np = (unsigned *)n; -#else - __attribute__ ((aligned (16))) unsigned key[8], nonce[2]; - ((vec *)key)[0] = REVV_BE(((vec *)k)[0]); - ((vec *)key)[1] = REVV_BE(((vec *)k)[1]); - nonce[0] = REVW_BE(((unsigned *)n)[0]); - nonce[1] = REVW_BE(((unsigned *)n)[1]); - kp = (unsigned *)key; - np = (unsigned *)nonce; -#endif - vec s0 = *(vec *)chacha_const; - vec s1 = ((vec *)kp)[0]; - vec s2 = ((vec *)kp)[1]; - vec s3 = NONCE(block_idx, np); - for (j = 0; j < LOOP_ITERATIONS; ++j) { - vec v0,v1,v2,v3,v4,v5,v6,v7; - v4 = v0 = s0; v5 = v1 = s1; v6 = v2 = s2; v3 = s3; - v7 = v3 + ONE; - #if VBPI > 2 - vec v8,v9,v10,v11; - v8 = v4; v9 = v5; v10 = v6; - v11 = v7 + ONE; - #endif - #if VBPI > 3 - vec v12,v13,v14,v15; - v12 = v8; v13 = v9; v14 = v10; - v15 = v11 + ONE; - #endif - #if GPR_TOO - register unsigned x0, x1, x2, x3, x4, x5, x6, x7, x8, - x9, x10, x11, x12, x13, x14, x15; - x0 = chacha_const[0]; x1 = chacha_const[1]; - x2 = chacha_const[2]; x3 = chacha_const[3]; - x4 = kp[0]; x5 = kp[1]; x6 = kp[2]; x7 = kp[3]; - x8 = kp[4]; x9 = kp[5]; x10 = kp[6]; x11 = kp[7]; - const uint64_t x_ctr = block_idx + BPI*iters+(BPI-1); - x12 = x_ctr & 0xffffffff; x13 = x_ctr>>32; x14 = np[0]; x15 = np[1]; - #endif - for (i = chacha_rounds/2; i; i--) { - DQROUND_VECTORS(v0,v1,v2,v3) - DQROUND_VECTORS(v4,v5,v6,v7) - #if VBPI > 2 - DQROUND_VECTORS(v8,v9,v10,v11) - #endif - #if VBPI > 3 - DQROUND_VECTORS(v12,v13,v14,v15) - #endif - #if GPR_TOO - QROUND_WORDS( x0, x4, x8,x12) - QROUND_WORDS( x1, x5, x9,x13) - QROUND_WORDS( x2, x6,x10,x14) - QROUND_WORDS( x3, x7,x11,x15) - QROUND_WORDS( x0, x5,x10,x15) - QROUND_WORDS( x1, x6,x11,x12) - QROUND_WORDS( x2, x7, x8,x13) - QROUND_WORDS( x3, x4, x9,x14) - #endif - } - WRITE(op, 0, v0+s0, v1+s1, v2+s2, v3+s3) - s3 += ONE; - WRITE(op, 16, v4+s0, v5+s1, v6+s2, v7+s3) - s3 += ONE; - #if VBPI > 2 - WRITE(op, 32, v8+s0, v9+s1, v10+s2, v11+s3) - s3 += ONE; - #endif - #if VBPI > 3 - WRITE(op, 48, v12+s0, v13+s1, v14+s2, v15+s3) - s3 += ONE; - #endif - op += VBPI*16; - #if GPR_TOO - op[0] = REVW_BE((x0 + chacha_const[0])); - op[1] = REVW_BE((x1 + chacha_const[1])); - op[2] = REVW_BE((x2 + chacha_const[2])); - op[3] = REVW_BE((x3 + chacha_const[3])); - op[4] = REVW_BE((x4 + kp[0])); - op[5] = REVW_BE((x5 + kp[1])); - op[6] = REVW_BE((x6 + kp[2])); - op[7] = REVW_BE((x7 + kp[3])); - op[8] = REVW_BE((x8 + kp[4])); - op[9] = REVW_BE((x9 + kp[5])); - op[10] = REVW_BE((x10 + kp[6])); - op[11] = REVW_BE((x11 + kp[7])); - op[12] = REVW_BE((x12 + (x_ctr & 0xffffffff))); - op[13] = REVW_BE((x13 + (x_ctr >> 32))); - op[14] = REVW_BE((x14 + np[0])); - op[15] = REVW_BE((x15 + np[1])); - s3 += ONE; - op += 16; - #endif - } - return 0; -} - -#define STATE_LEN (sizeof(struct chacha_state_krovetz)) -#define STATE_BYTES 40 -#define IDX_STEP (BPI * LOOP_ITERATIONS) -#define OUTPUT_LEN (IDX_STEP * 64) - -static void -chacha_krovetz_state_setup(void *state, const uint8_t *bytes) -{ - struct chacha_state_krovetz *st = state; - memcpy(st->key, bytes, 32); - memcpy(st->nonce, bytes+32, 8); -} - -static void -chacha8_krovetz_generate(void *state, uint8_t *output, uint32_t idx) -{ - struct chacha_state_krovetz *st = state; - ottery_blocks_chacha_krovetz(8, output, idx * IDX_STEP, st); -} - -static void -chacha12_krovetz_generate(void *state, uint8_t *output, uint32_t idx) -{ - struct chacha_state_krovetz *st = state; - ottery_blocks_chacha_krovetz(12, output, idx * IDX_STEP, st); -} - -static void -chacha20_krovetz_generate(void *state, uint8_t *output, uint32_t idx) -{ - struct chacha_state_krovetz *st = state; - ottery_blocks_chacha_krovetz(20, output, idx * IDX_STEP, st); -} - -#ifdef __SSSE3__ -#define NEED_CPUCAP OTTERY_CPUCAP_SSSE3|OTTERY_CPUCAP_SIMD -#define FLAV "-SSSE3" -#else -#define NEED_CPUCAP OTTERY_CPUCAP_SIMD -#define FLAV "-DEFAULT" -#endif - -#define PRF_CHACHA(r) { \ - "CHACHA" #r, \ - "CHACHA" #r "-SIMD", \ - "CHACHA" #r "-SIMD" FLAV, \ - STATE_LEN, \ - STATE_BYTES, \ - OUTPUT_LEN, \ - NEED_CPUCAP, \ - chacha_krovetz_state_setup, \ - chacha ## r ## _krovetz_generate \ -} - -#if defined OTTERY_BUILDING_SIMD1 -const struct ottery_prf ottery_prf_chacha8_krovetz_1_ = PRF_CHACHA(8); -const struct ottery_prf ottery_prf_chacha12_krovetz_1_ = PRF_CHACHA(12); -const struct ottery_prf ottery_prf_chacha20_krovetz_1_ = PRF_CHACHA(20); -#elif defined OTTERY_BUILDING_SIMD2 -const struct ottery_prf ottery_prf_chacha8_krovetz_2_ = PRF_CHACHA(8); -const struct ottery_prf ottery_prf_chacha12_krovetz_2_ = PRF_CHACHA(12); -const struct ottery_prf ottery_prf_chacha20_krovetz_2_ = PRF_CHACHA(20); -#else -#error "Which PRF symbols am I supposed to define?" -#endif |