diff options
Diffstat (limited to 'SSHSHA.C')
| -rw-r--r-- | SSHSHA.C | 934 |
1 files changed, 0 insertions, 934 deletions
diff --git a/SSHSHA.C b/SSHSHA.C deleted file mode 100644 index a5e79e6a..00000000 --- a/SSHSHA.C +++ /dev/null @@ -1,934 +0,0 @@ -/* - * SHA-1 algorithm as described at - * - * http://csrc.nist.gov/cryptval/shs.html - */ - -#include "ssh.h" -#include <assert.h> - -/* - * Start by deciding whether we can support hardware SHA at all. - */ -#define HW_SHA1_NONE 0 -#define HW_SHA1_NI 1 -#define HW_SHA1_NEON 2 - -#ifdef _FORCE_SHA_NI -# define HW_SHA1 HW_SHA1_NI -#elif defined(__clang__) -# if __has_attribute(target) && __has_include(<wmmintrin.h>) && \ - (defined(__x86_64__) || defined(__i386)) -# define HW_SHA1 HW_SHA1_NI -# endif -#elif defined(__GNUC__) -# if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)) && \ - (defined(__x86_64__) || defined(__i386)) -# define HW_SHA1 HW_SHA1_NI -# endif -#elif defined (_MSC_VER) -# if (defined(_M_X64) || defined(_M_IX86)) && _MSC_FULL_VER >= 150030729 -# define HW_SHA1 HW_SHA1_NI -# endif -#endif - -#ifdef _FORCE_SHA_NEON -# define HW_SHA1 HW_SHA1_NEON -#elif defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - /* Arm can potentially support both endiannesses, but this code - * hasn't been tested on anything but little. If anyone wants to - * run big-endian, they'll need to fix it first. */ -#elif defined __ARM_FEATURE_CRYPTO - /* If the Arm crypto extension is available already, we can - * support NEON SHA without having to enable anything by hand */ -# define HW_SHA1 HW_SHA1_NEON -#elif defined(__clang__) -# if __has_attribute(target) && __has_include(<arm_neon.h>) && \ - (defined(__aarch64__)) - /* clang can enable the crypto extension in AArch64 using - * __attribute__((target)) */ -# define HW_SHA1 HW_SHA1_NEON -# define USE_CLANG_ATTR_TARGET_AARCH64 -# endif -#elif defined _MSC_VER - /* Visual Studio supports the crypto extension when targeting - * AArch64, but as of VS2017, the AArch32 header doesn't quite - * manage it (declaring the shae/shad intrinsics without a round - * key operand). */ -# if defined _M_ARM64 -# define HW_SHA1 HW_SHA1_NEON -# if defined _M_ARM64 -# define USE_ARM64_NEON_H /* unusual header name in this case */ -# endif -# endif -#endif - -#if defined _FORCE_SOFTWARE_SHA || !defined HW_SHA1 -# undef HW_SHA1 -# define HW_SHA1 HW_SHA1_NONE -#endif - -/* - * The actual query function that asks if hardware acceleration is - * available. - */ -static bool sha1_hw_available(void); - -/* - * The top-level selection function, caching the results of - * sha1_hw_available() so it only has to run once. - */ -static bool sha1_hw_available_cached(void) -{ - static bool initialised = false; - static bool hw_available; - if (!initialised) { - hw_available = sha1_hw_available(); - initialised = true; - } - return hw_available; -} - -static ssh_hash *sha1_select(const ssh_hashalg *alg) -{ - const ssh_hashalg *real_alg = - sha1_hw_available_cached() ? &ssh_sha1_hw : &ssh_sha1_sw; - - return ssh_hash_new(real_alg); -} - -const ssh_hashalg ssh_sha1 = { - .new = sha1_select, - .hlen = 20, - .blocklen = 64, - HASHALG_NAMES_ANNOTATED("SHA-1", "dummy selector vtable"), -}; - -/* ---------------------------------------------------------------------- - * Definitions likely to be helpful to multiple implementations. - */ - -static const uint32_t sha1_initial_state[] = { - 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0, -}; - -#define SHA1_ROUNDS_PER_STAGE 20 -#define SHA1_STAGE0_CONSTANT 0x5a827999 -#define SHA1_STAGE1_CONSTANT 0x6ed9eba1 -#define SHA1_STAGE2_CONSTANT 0x8f1bbcdc -#define SHA1_STAGE3_CONSTANT 0xca62c1d6 -#define SHA1_ROUNDS (4 * SHA1_ROUNDS_PER_STAGE) - -typedef struct sha1_block sha1_block; -struct sha1_block { - uint8_t block[64]; - size_t used; - uint64_t len; -}; - -static inline void sha1_block_setup(sha1_block *blk) -{ - blk->used = 0; - blk->len = 0; -} - -static inline bool sha1_block_write( - sha1_block *blk, const void **vdata, size_t *len) -{ - size_t blkleft = sizeof(blk->block) - blk->used; - size_t chunk = *len < blkleft ? *len : blkleft; - - const uint8_t *p = *vdata; - memcpy(blk->block + blk->used, p, chunk); - *vdata = p + chunk; - *len -= chunk; - blk->used += chunk; - blk->len += chunk; - - if (blk->used == sizeof(blk->block)) { - blk->used = 0; - return true; - } - - return false; -} - -static inline void sha1_block_pad(sha1_block *blk, BinarySink *bs) -{ - uint64_t final_len = blk->len << 3; - size_t pad = 1 + (63 & (55 - blk->used)); - - put_byte(bs, 0x80); - for (size_t i = 1; i < pad; i++) - put_byte(bs, 0); - put_uint64(bs, final_len); - - assert(blk->used == 0 && "Should have exactly hit a block boundary"); -} - -/* ---------------------------------------------------------------------- - * Software implementation of SHA-1. - */ - -static inline uint32_t rol(uint32_t x, unsigned y) -{ - return (x << (31 & y)) | (x >> (31 & -y)); -} - -static inline uint32_t Ch(uint32_t ctrl, uint32_t if1, uint32_t if0) -{ - return if0 ^ (ctrl & (if1 ^ if0)); -} - -static inline uint32_t Maj(uint32_t x, uint32_t y, uint32_t z) -{ - return (x & y) | (z & (x | y)); -} - -static inline uint32_t Par(uint32_t x, uint32_t y, uint32_t z) -{ - return (x ^ y ^ z); -} - -static inline void sha1_sw_round( - unsigned round_index, const uint32_t *schedule, - uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, - uint32_t f, uint32_t constant) -{ - *e = rol(*a, 5) + f + *e + schedule[round_index] + constant; - *b = rol(*b, 30); -} - -static void sha1_sw_block(uint32_t *core, const uint8_t *block) -{ - uint32_t w[SHA1_ROUNDS]; - uint32_t a,b,c,d,e; - - for (size_t t = 0; t < 16; t++) - w[t] = GET_32BIT_MSB_FIRST(block + 4*t); - - for (size_t t = 16; t < SHA1_ROUNDS; t++) - w[t] = rol(w[t - 3] ^ w[t - 8] ^ w[t - 14] ^ w[t - 16], 1); - - a = core[0]; b = core[1]; c = core[2]; d = core[3]; - e = core[4]; - - size_t t = 0; - for (size_t u = 0; u < SHA1_ROUNDS_PER_STAGE/5; u++) { - sha1_sw_round(t++,w, &a,&b,&c,&d,&e, Ch(b,c,d), SHA1_STAGE0_CONSTANT); - sha1_sw_round(t++,w, &e,&a,&b,&c,&d, Ch(a,b,c), SHA1_STAGE0_CONSTANT); - sha1_sw_round(t++,w, &d,&e,&a,&b,&c, Ch(e,a,b), SHA1_STAGE0_CONSTANT); - sha1_sw_round(t++,w, &c,&d,&e,&a,&b, Ch(d,e,a), SHA1_STAGE0_CONSTANT); - sha1_sw_round(t++,w, &b,&c,&d,&e,&a, Ch(c,d,e), SHA1_STAGE0_CONSTANT); - } - for (size_t u = 0; u < SHA1_ROUNDS_PER_STAGE/5; u++) { - sha1_sw_round(t++,w, &a,&b,&c,&d,&e, Par(b,c,d), SHA1_STAGE1_CONSTANT); - sha1_sw_round(t++,w, &e,&a,&b,&c,&d, Par(a,b,c), SHA1_STAGE1_CONSTANT); - sha1_sw_round(t++,w, &d,&e,&a,&b,&c, Par(e,a,b), SHA1_STAGE1_CONSTANT); - sha1_sw_round(t++,w, &c,&d,&e,&a,&b, Par(d,e,a), SHA1_STAGE1_CONSTANT); - sha1_sw_round(t++,w, &b,&c,&d,&e,&a, Par(c,d,e), SHA1_STAGE1_CONSTANT); - } - for (size_t u = 0; u < SHA1_ROUNDS_PER_STAGE/5; u++) { - sha1_sw_round(t++,w, &a,&b,&c,&d,&e, Maj(b,c,d), SHA1_STAGE2_CONSTANT); - sha1_sw_round(t++,w, &e,&a,&b,&c,&d, Maj(a,b,c), SHA1_STAGE2_CONSTANT); - sha1_sw_round(t++,w, &d,&e,&a,&b,&c, Maj(e,a,b), SHA1_STAGE2_CONSTANT); - sha1_sw_round(t++,w, &c,&d,&e,&a,&b, Maj(d,e,a), SHA1_STAGE2_CONSTANT); - sha1_sw_round(t++,w, &b,&c,&d,&e,&a, Maj(c,d,e), SHA1_STAGE2_CONSTANT); - } - for (size_t u = 0; u < SHA1_ROUNDS_PER_STAGE/5; u++) { - sha1_sw_round(t++,w, &a,&b,&c,&d,&e, Par(b,c,d), SHA1_STAGE3_CONSTANT); - sha1_sw_round(t++,w, &e,&a,&b,&c,&d, Par(a,b,c), SHA1_STAGE3_CONSTANT); - sha1_sw_round(t++,w, &d,&e,&a,&b,&c, Par(e,a,b), SHA1_STAGE3_CONSTANT); - sha1_sw_round(t++,w, &c,&d,&e,&a,&b, Par(d,e,a), SHA1_STAGE3_CONSTANT); - sha1_sw_round(t++,w, &b,&c,&d,&e,&a, Par(c,d,e), SHA1_STAGE3_CONSTANT); - } - - core[0] += a; core[1] += b; core[2] += c; core[3] += d; core[4] += e; - - smemclr(w, sizeof(w)); -} - -typedef struct sha1_sw { - uint32_t core[5]; - sha1_block blk; - BinarySink_IMPLEMENTATION; - ssh_hash hash; -} sha1_sw; - -static void sha1_sw_write(BinarySink *bs, const void *vp, size_t len); - -static ssh_hash *sha1_sw_new(const ssh_hashalg *alg) -{ - sha1_sw *s = snew(sha1_sw); - - s->hash.vt = alg; - BinarySink_INIT(s, sha1_sw_write); - BinarySink_DELEGATE_INIT(&s->hash, s); - return &s->hash; -} - -static void sha1_sw_reset(ssh_hash *hash) -{ - sha1_sw *s = container_of(hash, sha1_sw, hash); - - memcpy(s->core, sha1_initial_state, sizeof(s->core)); - sha1_block_setup(&s->blk); -} - -static void sha1_sw_copyfrom(ssh_hash *hcopy, ssh_hash *horig) -{ - sha1_sw *copy = container_of(hcopy, sha1_sw, hash); - sha1_sw *orig = container_of(horig, sha1_sw, hash); - - memcpy(copy, orig, sizeof(*copy)); - BinarySink_COPIED(copy); - BinarySink_DELEGATE_INIT(©->hash, copy); -} - -static void sha1_sw_free(ssh_hash *hash) -{ - sha1_sw *s = container_of(hash, sha1_sw, hash); - - smemclr(s, sizeof(*s)); - sfree(s); -} - -static void sha1_sw_write(BinarySink *bs, const void *vp, size_t len) -{ - sha1_sw *s = BinarySink_DOWNCAST(bs, sha1_sw); - - while (len > 0) - if (sha1_block_write(&s->blk, &vp, &len)) - sha1_sw_block(s->core, s->blk.block); -} - -static void sha1_sw_digest(ssh_hash *hash, uint8_t *digest) -{ - sha1_sw *s = container_of(hash, sha1_sw, hash); - - sha1_block_pad(&s->blk, BinarySink_UPCAST(s)); - for (size_t i = 0; i < 5; i++) - PUT_32BIT_MSB_FIRST(digest + 4*i, s->core[i]); -} - -const ssh_hashalg ssh_sha1_sw = { - .new = sha1_sw_new, - .reset = sha1_sw_reset, - .copyfrom = sha1_sw_copyfrom, - .digest = sha1_sw_digest, - .free = sha1_sw_free, - .hlen = 20, - .blocklen = 64, - HASHALG_NAMES_ANNOTATED("SHA-1", "unaccelerated"), -}; - -/* ---------------------------------------------------------------------- - * Hardware-accelerated implementation of SHA-1 using x86 SHA-NI. - */ - -#if HW_SHA1 == HW_SHA1_NI - -/* - * Set target architecture for Clang and GCC - */ - -#if defined(__clang__) || defined(__GNUC__) -# define FUNC_ISA __attribute__ ((target("sse4.1,sha"))) -#if !defined(__clang__) -# pragma GCC target("sha") -# pragma GCC target("sse4.1") -#endif -#else -# define FUNC_ISA -#endif - -#include <wmmintrin.h> -#include <smmintrin.h> -#include <immintrin.h> -#if defined(__clang__) || defined(__GNUC__) -#include <shaintrin.h> -#endif - -#if defined(__clang__) || defined(__GNUC__) -#include <cpuid.h> -#define GET_CPU_ID_0(out) \ - __cpuid(0, (out)[0], (out)[1], (out)[2], (out)[3]) -#define GET_CPU_ID_7(out) \ - __cpuid_count(7, 0, (out)[0], (out)[1], (out)[2], (out)[3]) -#else -#define GET_CPU_ID_0(out) __cpuid(out, 0) -#define GET_CPU_ID_7(out) __cpuidex(out, 7, 0) -#endif - -static bool sha1_hw_available(void) -{ - unsigned int CPUInfo[4]; - GET_CPU_ID_0(CPUInfo); - if (CPUInfo[0] < 7) - return false; - - GET_CPU_ID_7(CPUInfo); - return CPUInfo[1] & (1 << 29); /* Check SHA */ -} - -/* SHA1 implementation using new instructions - The code is based on Jeffrey Walton's SHA1 implementation: - https://github.com/noloader/SHA-Intrinsics -*/ -FUNC_ISA -static inline void sha1_ni_block(__m128i *core, const uint8_t *p) -{ - __m128i ABCD, E0, E1, MSG0, MSG1, MSG2, MSG3; - const __m128i MASK = _mm_set_epi64x( - 0x0001020304050607ULL, 0x08090a0b0c0d0e0fULL); - - const __m128i *block = (const __m128i *)p; - - /* Load initial values */ - ABCD = core[0]; - E0 = core[1]; - - /* Rounds 0-3 */ - MSG0 = _mm_loadu_si128(block); - MSG0 = _mm_shuffle_epi8(MSG0, MASK); - E0 = _mm_add_epi32(E0, MSG0); - E1 = ABCD; - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 0); - - /* Rounds 4-7 */ - MSG1 = _mm_loadu_si128(block + 1); - MSG1 = _mm_shuffle_epi8(MSG1, MASK); - E1 = _mm_sha1nexte_epu32(E1, MSG1); - E0 = ABCD; - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 0); - MSG0 = _mm_sha1msg1_epu32(MSG0, MSG1); - - /* Rounds 8-11 */ - MSG2 = _mm_loadu_si128(block + 2); - MSG2 = _mm_shuffle_epi8(MSG2, MASK); - E0 = _mm_sha1nexte_epu32(E0, MSG2); - E1 = ABCD; - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 0); - MSG1 = _mm_sha1msg1_epu32(MSG1, MSG2); - MSG0 = _mm_xor_si128(MSG0, MSG2); - - /* Rounds 12-15 */ - MSG3 = _mm_loadu_si128(block + 3); - MSG3 = _mm_shuffle_epi8(MSG3, MASK); - E1 = _mm_sha1nexte_epu32(E1, MSG3); - E0 = ABCD; - MSG0 = _mm_sha1msg2_epu32(MSG0, MSG3); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 0); - MSG2 = _mm_sha1msg1_epu32(MSG2, MSG3); - MSG1 = _mm_xor_si128(MSG1, MSG3); - - /* Rounds 16-19 */ - E0 = _mm_sha1nexte_epu32(E0, MSG0); - E1 = ABCD; - MSG1 = _mm_sha1msg2_epu32(MSG1, MSG0); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 0); - MSG3 = _mm_sha1msg1_epu32(MSG3, MSG0); - MSG2 = _mm_xor_si128(MSG2, MSG0); - - /* Rounds 20-23 */ - E1 = _mm_sha1nexte_epu32(E1, MSG1); - E0 = ABCD; - MSG2 = _mm_sha1msg2_epu32(MSG2, MSG1); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 1); - MSG0 = _mm_sha1msg1_epu32(MSG0, MSG1); - MSG3 = _mm_xor_si128(MSG3, MSG1); - - /* Rounds 24-27 */ - E0 = _mm_sha1nexte_epu32(E0, MSG2); - E1 = ABCD; - MSG3 = _mm_sha1msg2_epu32(MSG3, MSG2); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 1); - MSG1 = _mm_sha1msg1_epu32(MSG1, MSG2); - MSG0 = _mm_xor_si128(MSG0, MSG2); - - /* Rounds 28-31 */ - E1 = _mm_sha1nexte_epu32(E1, MSG3); - E0 = ABCD; - MSG0 = _mm_sha1msg2_epu32(MSG0, MSG3); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 1); - MSG2 = _mm_sha1msg1_epu32(MSG2, MSG3); - MSG1 = _mm_xor_si128(MSG1, MSG3); - - /* Rounds 32-35 */ - E0 = _mm_sha1nexte_epu32(E0, MSG0); - E1 = ABCD; - MSG1 = _mm_sha1msg2_epu32(MSG1, MSG0); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 1); - MSG3 = _mm_sha1msg1_epu32(MSG3, MSG0); - MSG2 = _mm_xor_si128(MSG2, MSG0); - - /* Rounds 36-39 */ - E1 = _mm_sha1nexte_epu32(E1, MSG1); - E0 = ABCD; - MSG2 = _mm_sha1msg2_epu32(MSG2, MSG1); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 1); - MSG0 = _mm_sha1msg1_epu32(MSG0, MSG1); - MSG3 = _mm_xor_si128(MSG3, MSG1); - - /* Rounds 40-43 */ - E0 = _mm_sha1nexte_epu32(E0, MSG2); - E1 = ABCD; - MSG3 = _mm_sha1msg2_epu32(MSG3, MSG2); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 2); - MSG1 = _mm_sha1msg1_epu32(MSG1, MSG2); - MSG0 = _mm_xor_si128(MSG0, MSG2); - - /* Rounds 44-47 */ - E1 = _mm_sha1nexte_epu32(E1, MSG3); - E0 = ABCD; - MSG0 = _mm_sha1msg2_epu32(MSG0, MSG3); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 2); - MSG2 = _mm_sha1msg1_epu32(MSG2, MSG3); - MSG1 = _mm_xor_si128(MSG1, MSG3); - - /* Rounds 48-51 */ - E0 = _mm_sha1nexte_epu32(E0, MSG0); - E1 = ABCD; - MSG1 = _mm_sha1msg2_epu32(MSG1, MSG0); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 2); - MSG3 = _mm_sha1msg1_epu32(MSG3, MSG0); - MSG2 = _mm_xor_si128(MSG2, MSG0); - - /* Rounds 52-55 */ - E1 = _mm_sha1nexte_epu32(E1, MSG1); - E0 = ABCD; - MSG2 = _mm_sha1msg2_epu32(MSG2, MSG1); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 2); - MSG0 = _mm_sha1msg1_epu32(MSG0, MSG1); - MSG3 = _mm_xor_si128(MSG3, MSG1); - - /* Rounds 56-59 */ - E0 = _mm_sha1nexte_epu32(E0, MSG2); - E1 = ABCD; - MSG3 = _mm_sha1msg2_epu32(MSG3, MSG2); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 2); - MSG1 = _mm_sha1msg1_epu32(MSG1, MSG2); - MSG0 = _mm_xor_si128(MSG0, MSG2); - - /* Rounds 60-63 */ - E1 = _mm_sha1nexte_epu32(E1, MSG3); - E0 = ABCD; - MSG0 = _mm_sha1msg2_epu32(MSG0, MSG3); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 3); - MSG2 = _mm_sha1msg1_epu32(MSG2, MSG3); - MSG1 = _mm_xor_si128(MSG1, MSG3); - - /* Rounds 64-67 */ - E0 = _mm_sha1nexte_epu32(E0, MSG0); - E1 = ABCD; - MSG1 = _mm_sha1msg2_epu32(MSG1, MSG0); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 3); - MSG3 = _mm_sha1msg1_epu32(MSG3, MSG0); - MSG2 = _mm_xor_si128(MSG2, MSG0); - - /* Rounds 68-71 */ - E1 = _mm_sha1nexte_epu32(E1, MSG1); - E0 = ABCD; - MSG2 = _mm_sha1msg2_epu32(MSG2, MSG1); - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 3); - MSG3 = _mm_xor_si128(MSG3, MSG1); - - /* Rounds 72-75 */ - E0 = _mm_sha1nexte_epu32(E0, MSG2); - E1 = ABCD; - MSG3 = _mm_sha1msg2_epu32(MSG3, MSG2); - ABCD = _mm_sha1rnds4_epu32(ABCD, E0, 3); - - /* Rounds 76-79 */ - E1 = _mm_sha1nexte_epu32(E1, MSG3); - E0 = ABCD; - ABCD = _mm_sha1rnds4_epu32(ABCD, E1, 3); - - /* Combine state */ - core[0] = _mm_add_epi32(ABCD, core[0]); - core[1] = _mm_sha1nexte_epu32(E0, core[1]); -} - -typedef struct sha1_ni { - /* - * core[0] stores the first four words of the SHA-1 state. core[1] - * stores just the fifth word, in the vector lane at the highest - * address. - */ - __m128i core[2]; - sha1_block blk; - void *pointer_to_free; - BinarySink_IMPLEMENTATION; - ssh_hash hash; -} sha1_ni; - -static void sha1_ni_write(BinarySink *bs, const void *vp, size_t len); - -static sha1_ni *sha1_ni_alloc(void) -{ - /* - * The __m128i variables in the context structure need to be - * 16-byte aligned, but not all malloc implementations that this - * code has to work with will guarantee to return a 16-byte - * aligned pointer. So we over-allocate, manually realign the - * pointer ourselves, and store the original one inside the - * context so we know how to free it later. - */ - void *allocation = smalloc(sizeof(sha1_ni) + 15); - uintptr_t alloc_address = (uintptr_t)allocation; - uintptr_t aligned_address = (alloc_address + 15) & ~15; - sha1_ni *s = (sha1_ni *)aligned_address; - s->pointer_to_free = allocation; - return s; -} - -static ssh_hash *sha1_ni_new(const ssh_hashalg *alg) -{ - if (!sha1_hw_available_cached()) - return NULL; - - sha1_ni *s = sha1_ni_alloc(); - - s->hash.vt = alg; - BinarySink_INIT(s, sha1_ni_write); - BinarySink_DELEGATE_INIT(&s->hash, s); - return &s->hash; -} - -FUNC_ISA static void sha1_ni_reset(ssh_hash *hash) -{ - sha1_ni *s = container_of(hash, sha1_ni, hash); - - /* Initialise the core vectors in their storage order */ - s->core[0] = _mm_set_epi64x( - 0x67452301efcdab89ULL, 0x98badcfe10325476ULL); - s->core[1] = _mm_set_epi32(0xc3d2e1f0, 0, 0, 0); - - sha1_block_setup(&s->blk); -} - -static void sha1_ni_copyfrom(ssh_hash *hcopy, ssh_hash *horig) -{ - sha1_ni *copy = container_of(hcopy, sha1_ni, hash); - sha1_ni *orig = container_of(horig, sha1_ni, hash); - - void *ptf_save = copy->pointer_to_free; - *copy = *orig; /* structure copy */ - copy->pointer_to_free = ptf_save; - - BinarySink_COPIED(copy); - BinarySink_DELEGATE_INIT(©->hash, copy); -} - -static void sha1_ni_free(ssh_hash *hash) -{ - sha1_ni *s = container_of(hash, sha1_ni, hash); - - void *ptf = s->pointer_to_free; - smemclr(s, sizeof(*s)); - sfree(ptf); -} - -static void sha1_ni_write(BinarySink *bs, const void *vp, size_t len) -{ - sha1_ni *s = BinarySink_DOWNCAST(bs, sha1_ni); - - while (len > 0) - if (sha1_block_write(&s->blk, &vp, &len)) - sha1_ni_block(s->core, s->blk.block); -} - -FUNC_ISA static void sha1_ni_digest(ssh_hash *hash, uint8_t *digest) -{ - sha1_ni *s = container_of(hash, sha1_ni, hash); - - sha1_block_pad(&s->blk, BinarySink_UPCAST(s)); - - /* Rearrange the first vector into its output order */ - __m128i abcd = _mm_shuffle_epi32(s->core[0], 0x1B); - - /* Byte-swap it into the output endianness */ - const __m128i mask = _mm_setr_epi8(3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12); - abcd = _mm_shuffle_epi8(abcd, mask); - - /* And store it */ - _mm_storeu_si128((__m128i *)digest, abcd); - - /* Finally, store the leftover word */ - uint32_t e = _mm_extract_epi32(s->core[1], 3); - PUT_32BIT_MSB_FIRST(digest + 16, e); -} - -const ssh_hashalg ssh_sha1_hw = { - .new = sha1_ni_new, - .reset = sha1_ni_reset, - .copyfrom = sha1_ni_copyfrom, - .digest = sha1_ni_digest, - .free = sha1_ni_free, - .hlen = 20, - .blocklen = 64, - HASHALG_NAMES_ANNOTATED("SHA-1", "SHA-NI accelerated"), -}; - -/* ---------------------------------------------------------------------- - * Hardware-accelerated implementation of SHA-1 using Arm NEON. - */ - -#elif HW_SHA1 == HW_SHA1_NEON - -/* - * Manually set the target architecture, if we decided above that we - * need to. - */ -#ifdef USE_CLANG_ATTR_TARGET_AARCH64 -/* - * A spot of cheating: redefine some ACLE feature macros before - * including arm_neon.h. Otherwise we won't get the SHA intrinsics - * defined by that header, because it will be looking at the settings - * for the whole translation unit rather than the ones we're going to - * put on some particular functions using __attribute__((target)). - */ -#define __ARM_NEON 1 -#define __ARM_FEATURE_CRYPTO 1 -#define __ARM_FEATURE_SHA2 1 -#define FUNC_ISA __attribute__ ((target("neon,crypto"))) -#endif /* USE_CLANG_ATTR_TARGET_AARCH64 */ - -#ifndef FUNC_ISA -#define FUNC_ISA -#endif - -#ifdef USE_ARM64_NEON_H -#include <arm64_neon.h> -#else -#include <arm_neon.h> -#endif - -static bool sha1_hw_available(void) -{ - /* - * For Arm, we delegate to a per-platform detection function (see - * explanation in sshaes.c). - */ - return platform_sha1_hw_available(); -} - -typedef struct sha1_neon_core sha1_neon_core; -struct sha1_neon_core { - uint32x4_t abcd; - uint32_t e; -}; - -FUNC_ISA -static inline uint32x4_t sha1_neon_load_input(const uint8_t *p) -{ - return vreinterpretq_u32_u8(vrev32q_u8(vld1q_u8(p))); -} - -FUNC_ISA -static inline uint32x4_t sha1_neon_schedule_update( - uint32x4_t m4, uint32x4_t m3, uint32x4_t m2, uint32x4_t m1) -{ - return vsha1su1q_u32(vsha1su0q_u32(m4, m3, m2), m1); -} - -/* - * SHA-1 has three different kinds of round, differing in whether they - * use the Ch, Maj or Par functions defined above. Each one uses a - * separate NEON instruction, so we define three inline functions for - * the different round types using this macro. - * - * The two batches of Par-type rounds also use a different constant, - * but that's passed in as an operand, so we don't need a fourth - * inline function just for that. - */ -#define SHA1_NEON_ROUND_FN(type) \ - FUNC_ISA static inline sha1_neon_core sha1_neon_round4_##type( \ - sha1_neon_core old, uint32x4_t sched, uint32x4_t constant) \ - { \ - sha1_neon_core new; \ - uint32x4_t round_input = vaddq_u32(sched, constant); \ - new.abcd = vsha1##type##q_u32(old.abcd, old.e, round_input); \ - new.e = vsha1h_u32(vget_lane_u32(vget_low_u32(old.abcd), 0)); \ - return new; \ - } -SHA1_NEON_ROUND_FN(c) -SHA1_NEON_ROUND_FN(p) -SHA1_NEON_ROUND_FN(m) - -FUNC_ISA -static inline void sha1_neon_block(sha1_neon_core *core, const uint8_t *p) -{ - uint32x4_t constant, s0, s1, s2, s3; - sha1_neon_core cr = *core; - - constant = vdupq_n_u32(SHA1_STAGE0_CONSTANT); - s0 = sha1_neon_load_input(p); - cr = sha1_neon_round4_c(cr, s0, constant); - s1 = sha1_neon_load_input(p + 16); - cr = sha1_neon_round4_c(cr, s1, constant); - s2 = sha1_neon_load_input(p + 32); - cr = sha1_neon_round4_c(cr, s2, constant); - s3 = sha1_neon_load_input(p + 48); - cr = sha1_neon_round4_c(cr, s3, constant); - s0 = sha1_neon_schedule_update(s0, s1, s2, s3); - cr = sha1_neon_round4_c(cr, s0, constant); - - constant = vdupq_n_u32(SHA1_STAGE1_CONSTANT); - s1 = sha1_neon_schedule_update(s1, s2, s3, s0); - cr = sha1_neon_round4_p(cr, s1, constant); - s2 = sha1_neon_schedule_update(s2, s3, s0, s1); - cr = sha1_neon_round4_p(cr, s2, constant); - s3 = sha1_neon_schedule_update(s3, s0, s1, s2); - cr = sha1_neon_round4_p(cr, s3, constant); - s0 = sha1_neon_schedule_update(s0, s1, s2, s3); - cr = sha1_neon_round4_p(cr, s0, constant); - s1 = sha1_neon_schedule_update(s1, s2, s3, s0); - cr = sha1_neon_round4_p(cr, s1, constant); - - constant = vdupq_n_u32(SHA1_STAGE2_CONSTANT); - s2 = sha1_neon_schedule_update(s2, s3, s0, s1); - cr = sha1_neon_round4_m(cr, s2, constant); - s3 = sha1_neon_schedule_update(s3, s0, s1, s2); - cr = sha1_neon_round4_m(cr, s3, constant); - s0 = sha1_neon_schedule_update(s0, s1, s2, s3); - cr = sha1_neon_round4_m(cr, s0, constant); - s1 = sha1_neon_schedule_update(s1, s2, s3, s0); - cr = sha1_neon_round4_m(cr, s1, constant); - s2 = sha1_neon_schedule_update(s2, s3, s0, s1); - cr = sha1_neon_round4_m(cr, s2, constant); - - constant = vdupq_n_u32(SHA1_STAGE3_CONSTANT); - s3 = sha1_neon_schedule_update(s3, s0, s1, s2); - cr = sha1_neon_round4_p(cr, s3, constant); - s0 = sha1_neon_schedule_update(s0, s1, s2, s3); - cr = sha1_neon_round4_p(cr, s0, constant); - s1 = sha1_neon_schedule_update(s1, s2, s3, s0); - cr = sha1_neon_round4_p(cr, s1, constant); - s2 = sha1_neon_schedule_update(s2, s3, s0, s1); - cr = sha1_neon_round4_p(cr, s2, constant); - s3 = sha1_neon_schedule_update(s3, s0, s1, s2); - cr = sha1_neon_round4_p(cr, s3, constant); - - core->abcd = vaddq_u32(core->abcd, cr.abcd); - core->e += cr.e; -} - -typedef struct sha1_neon { - sha1_neon_core core; - sha1_block blk; - BinarySink_IMPLEMENTATION; - ssh_hash hash; -} sha1_neon; - -static void sha1_neon_write(BinarySink *bs, const void *vp, size_t len); - -static ssh_hash *sha1_neon_new(const ssh_hashalg *alg) -{ - if (!sha1_hw_available_cached()) - return NULL; - - sha1_neon *s = snew(sha1_neon); - - s->hash.vt = alg; - BinarySink_INIT(s, sha1_neon_write); - BinarySink_DELEGATE_INIT(&s->hash, s); - return &s->hash; -} - -static void sha1_neon_reset(ssh_hash *hash) -{ - sha1_neon *s = container_of(hash, sha1_neon, hash); - - s->core.abcd = vld1q_u32(sha1_initial_state); - s->core.e = sha1_initial_state[4]; - - sha1_block_setup(&s->blk); -} - -static void sha1_neon_copyfrom(ssh_hash *hcopy, ssh_hash *horig) -{ - sha1_neon *copy = container_of(hcopy, sha1_neon, hash); - sha1_neon *orig = container_of(horig, sha1_neon, hash); - - *copy = *orig; /* structure copy */ - - BinarySink_COPIED(copy); - BinarySink_DELEGATE_INIT(©->hash, copy); -} - -static void sha1_neon_free(ssh_hash *hash) -{ - sha1_neon *s = container_of(hash, sha1_neon, hash); - smemclr(s, sizeof(*s)); - sfree(s); -} - -static void sha1_neon_write(BinarySink *bs, const void *vp, size_t len) -{ - sha1_neon *s = BinarySink_DOWNCAST(bs, sha1_neon); - - while (len > 0) - if (sha1_block_write(&s->blk, &vp, &len)) - sha1_neon_block(&s->core, s->blk.block); -} - -static void sha1_neon_digest(ssh_hash *hash, uint8_t *digest) -{ - sha1_neon *s = container_of(hash, sha1_neon, hash); - - sha1_block_pad(&s->blk, BinarySink_UPCAST(s)); - vst1q_u8(digest, vrev32q_u8(vreinterpretq_u8_u32(s->core.abcd))); - PUT_32BIT_MSB_FIRST(digest + 16, s->core.e); -} - -const ssh_hashalg ssh_sha1_hw = { - .new = sha1_neon_new, - .reset = sha1_neon_reset, - .copyfrom = sha1_neon_copyfrom, - .digest = sha1_neon_digest, - .free = sha1_neon_free, - .hlen = 20, - .blocklen = 64, - HASHALG_NAMES_ANNOTATED("SHA-1", "NEON accelerated"), -}; - -/* ---------------------------------------------------------------------- - * Stub functions if we have no hardware-accelerated SHA-1. In this - * case, sha1_hw_new returns NULL (though it should also never be - * selected by sha1_select, so the only thing that should even be - * _able_ to call it is testcrypt). As a result, the remaining vtable - * functions should never be called at all. - */ - -#elif HW_SHA1 == HW_SHA1_NONE - -static bool sha1_hw_available(void) -{ - return false; -} - -static ssh_hash *sha1_stub_new(const ssh_hashalg *alg) -{ - return NULL; -} - -#define STUB_BODY { unreachable("Should never be called"); } - -static void sha1_stub_reset(ssh_hash *hash) STUB_BODY -static void sha1_stub_copyfrom(ssh_hash *hash, ssh_hash *orig) STUB_BODY -static void sha1_stub_free(ssh_hash *hash) STUB_BODY -static void sha1_stub_digest(ssh_hash *hash, uint8_t *digest) STUB_BODY - -const ssh_hashalg ssh_sha1_hw = { - .new = sha1_stub_new, - .reset = sha1_stub_reset, - .copyfrom = sha1_stub_copyfrom, - .digest = sha1_stub_digest, - .free = sha1_stub_free, - .hlen = 20, - .blocklen = 64, - HASHALG_NAMES_ANNOTATED("SHA-1", "!NONEXISTENT ACCELERATED VERSION!"), -}; - -#endif /* HW_SHA1 */ |