crypto/fipsmodule/sha/sha512.cc.inc - boringssl - Git at Google

 // Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include <string.h>

 #include <openssl/mem.h>

 #include "../../internal.h"
 #include "../bcm_interface.h"
 #include "../service_indicator/internal.h"
 #include "internal.h"


 // The 32-bit hash algorithms share a common byte-order neutral collector and
 // padding function implementations that operate on unaligned data,
 // ../digest/md32_common.h. SHA-512 is the only 64-bit hash algorithm, as of
 // this writing, so there is no need for a common collector/padding
 // implementation yet.

 static void sha512_final_impl(uint8_t *out, size_t md_len, SHA512_CTX *sha);

 bcm_infallible BCM_sha384_init(SHA512_CTX *sha) {
   sha->h[0] = UINT64_C(0xcbbb9d5dc1059ed8);
   sha->h[1] = UINT64_C(0x629a292a367cd507);
   sha->h[2] = UINT64_C(0x9159015a3070dd17);
   sha->h[3] = UINT64_C(0x152fecd8f70e5939);
   sha->h[4] = UINT64_C(0x67332667ffc00b31);
   sha->h[5] = UINT64_C(0x8eb44a8768581511);
   sha->h[6] = UINT64_C(0xdb0c2e0d64f98fa7);
   sha->h[7] = UINT64_C(0x47b5481dbefa4fa4);

   sha->bytes_so_far_low = 0;
   sha->bytes_so_far_high = 0;
   sha->num = 0;
   sha->md_len = BCM_SHA384_DIGEST_LENGTH;
   return bcm_infallible::approved;
 }


 bcm_infallible BCM_sha512_init(SHA512_CTX *sha) {
   sha->h[0] = UINT64_C(0x6a09e667f3bcc908);
   sha->h[1] = UINT64_C(0xbb67ae8584caa73b);
   sha->h[2] = UINT64_C(0x3c6ef372fe94f82b);
   sha->h[3] = UINT64_C(0xa54ff53a5f1d36f1);
   sha->h[4] = UINT64_C(0x510e527fade682d1);
   sha->h[5] = UINT64_C(0x9b05688c2b3e6c1f);
   sha->h[6] = UINT64_C(0x1f83d9abfb41bd6b);
   sha->h[7] = UINT64_C(0x5be0cd19137e2179);

   sha->bytes_so_far_low = 0;
   sha->bytes_so_far_high = 0;
   sha->num = 0;
   sha->md_len = BCM_SHA512_DIGEST_LENGTH;
   return bcm_infallible::approved;
 }

 bcm_infallible BCM_sha512_256_init(SHA512_CTX *sha) {
   sha->h[0] = UINT64_C(0x22312194fc2bf72c);
   sha->h[1] = UINT64_C(0x9f555fa3c84c64c2);
   sha->h[2] = UINT64_C(0x2393b86b6f53b151);
   sha->h[3] = UINT64_C(0x963877195940eabd);
   sha->h[4] = UINT64_C(0x96283ee2a88effe3);
   sha->h[5] = UINT64_C(0xbe5e1e2553863992);
   sha->h[6] = UINT64_C(0x2b0199fc2c85b8aa);
   sha->h[7] = UINT64_C(0x0eb72ddc81c52ca2);

   sha->bytes_so_far_low = 0;
   sha->bytes_so_far_high = 0;
   sha->num = 0;
   sha->md_len = BCM_SHA512_256_DIGEST_LENGTH;
   return bcm_infallible::approved;
 }

 #if !defined(SHA512_ASM)
 static void sha512_block_data_order(uint64_t state[8], const uint8_t *in,
                                     size_t num_blocks);
 #endif


 bcm_infallible BCM_sha384_final(uint8_t out[BCM_SHA384_DIGEST_LENGTH],
                                 SHA512_CTX *sha) {
   // This function must be paired with |BCM_sha384_init|, which sets
   // |sha->md_len| to |BCM_SHA384_DIGEST_LENGTH|.
   assert(sha->md_len == BCM_SHA384_DIGEST_LENGTH);
   sha512_final_impl(out, BCM_SHA384_DIGEST_LENGTH, sha);
   return bcm_infallible::approved;
 }

 bcm_infallible BCM_sha384_update(SHA512_CTX *sha, const void *data,
                                  size_t len) {
   return BCM_sha512_update(sha, data, len);
 }

 bcm_infallible BCM_sha512_256_update(SHA512_CTX *sha, const void *data,
                                      size_t len) {
   return BCM_sha512_update(sha, data, len);
 }

 bcm_infallible BCM_sha512_256_final(uint8_t out[BCM_SHA512_256_DIGEST_LENGTH],
                                     SHA512_CTX *sha) {
   // This function must be paired with |BCM_sha512_256_init|, which sets
   // |sha->md_len| to |BCM_SHA512_256_DIGEST_LENGTH|.
   assert(sha->md_len == BCM_SHA512_256_DIGEST_LENGTH);
   sha512_final_impl(out, BCM_SHA512_256_DIGEST_LENGTH, sha);
   return bcm_infallible::approved;
 }

 bcm_infallible BCM_sha512_transform(SHA512_CTX *c,
                                     const uint8_t block[SHA512_CBLOCK]) {
   sha512_block_data_order(c->h, block, 1);
   return bcm_infallible::approved;
 }

 bcm_infallible BCM_sha512_update(SHA512_CTX *c, const void *in_data,
                                  size_t len) {
   uint8_t *p = c->p;
   const uint8_t *data = reinterpret_cast<const uint8_t *>(in_data);

   if (len == 0) {
     return bcm_infallible::approved;
   }

   c->bytes_so_far_low += len;
   if (c->bytes_so_far_low < len) {
     c->bytes_so_far_high++;
   }

   if (c->num != 0) {
     size_t n = sizeof(c->p) - c->num;

     if (len < n) {
       OPENSSL_memcpy(p + c->num, data, len);
       c->num += (unsigned int)len;
       return bcm_infallible::approved;
     } else {
       OPENSSL_memcpy(p + c->num, data, n), c->num = 0;
       len -= n;
       data += n;
       sha512_block_data_order(c->h, p, 1);
     }
   }

   if (len >= sizeof(c->p)) {
     sha512_block_data_order(c->h, data, len / sizeof(c->p));
     data += len;
     len %= sizeof(c->p);
     data -= len;
   }

   if (len != 0) {
     OPENSSL_memcpy(p, data, len);
     c->num = (int)len;
   }

   return bcm_infallible::approved;
 }

 bcm_infallible BCM_sha512_final(uint8_t out[BCM_SHA512_DIGEST_LENGTH],
                                 SHA512_CTX *sha) {
   // Ideally we would assert |sha->md_len| is |BCM_SHA512_DIGEST_LENGTH| to
   // match the size hint, but calling code often pairs |BCM_sha384_init| with
   // |BCM_sha512_final| and expects |sha->md_len| to carry the size over.
   //
   // TODO(davidben): Add an assert and fix code to match them up.
   sha512_final_impl(out, sha->md_len, sha);
   return bcm_infallible::approved;
 }

 static void sha512_final_impl(uint8_t *out, size_t md_len, SHA512_CTX *sha) {
   uint8_t *p = sha->p;
   size_t n = sha->num;

   p[n] = 0x80;  // There always is a room for one
   n++;
   if (n > (sizeof(sha->p) - 16)) {
     OPENSSL_memset(p + n, 0, sizeof(sha->p) - n);
     n = 0;
     sha512_block_data_order(sha->h, p, 1);
   }

   OPENSSL_memset(p + n, 0, sizeof(sha->p) - 16 - n);
   const uint64_t Nh = (uint64_t{sha->bytes_so_far_high} << 3) |
                       (sha->bytes_so_far_low >> (64 - 3));
   const uint64_t Nl = sha->bytes_so_far_low << 3;
   CRYPTO_store_u64_be(p + sizeof(sha->p) - 16, Nh);
   CRYPTO_store_u64_be(p + sizeof(sha->p) - 8, Nl);

   sha512_block_data_order(sha->h, p, 1);

   assert(md_len % 8 == 0);
   const size_t out_words = md_len / 8;
   for (size_t i = 0; i < out_words; i++) {
     CRYPTO_store_u64_be(out, sha->h[i]);
     out += 8;
   }

   FIPS_service_indicator_update_state();
 }

 #if !defined(SHA512_ASM)

 #if !defined(SHA512_ASM_NOHW)
 static const uint64_t K512[80] = {
     UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd),
     UINT64_C(0xb5c0fbcfec4d3b2f), UINT64_C(0xe9b5dba58189dbbc),
     UINT64_C(0x3956c25bf348b538), UINT64_C(0x59f111f1b605d019),
     UINT64_C(0x923f82a4af194f9b), UINT64_C(0xab1c5ed5da6d8118),
     UINT64_C(0xd807aa98a3030242), UINT64_C(0x12835b0145706fbe),
     UINT64_C(0x243185be4ee4b28c), UINT64_C(0x550c7dc3d5ffb4e2),
     UINT64_C(0x72be5d74f27b896f), UINT64_C(0x80deb1fe3b1696b1),
     UINT64_C(0x9bdc06a725c71235), UINT64_C(0xc19bf174cf692694),
     UINT64_C(0xe49b69c19ef14ad2), UINT64_C(0xefbe4786384f25e3),
     UINT64_C(0x0fc19dc68b8cd5b5), UINT64_C(0x240ca1cc77ac9c65),
     UINT64_C(0x2de92c6f592b0275), UINT64_C(0x4a7484aa6ea6e483),
     UINT64_C(0x5cb0a9dcbd41fbd4), UINT64_C(0x76f988da831153b5),
     UINT64_C(0x983e5152ee66dfab), UINT64_C(0xa831c66d2db43210),
     UINT64_C(0xb00327c898fb213f), UINT64_C(0xbf597fc7beef0ee4),
     UINT64_C(0xc6e00bf33da88fc2), UINT64_C(0xd5a79147930aa725),
     UINT64_C(0x06ca6351e003826f), UINT64_C(0x142929670a0e6e70),
     UINT64_C(0x27b70a8546d22ffc), UINT64_C(0x2e1b21385c26c926),
     UINT64_C(0x4d2c6dfc5ac42aed), UINT64_C(0x53380d139d95b3df),
     UINT64_C(0x650a73548baf63de), UINT64_C(0x766a0abb3c77b2a8),
     UINT64_C(0x81c2c92e47edaee6), UINT64_C(0x92722c851482353b),
     UINT64_C(0xa2bfe8a14cf10364), UINT64_C(0xa81a664bbc423001),
     UINT64_C(0xc24b8b70d0f89791), UINT64_C(0xc76c51a30654be30),
     UINT64_C(0xd192e819d6ef5218), UINT64_C(0xd69906245565a910),
     UINT64_C(0xf40e35855771202a), UINT64_C(0x106aa07032bbd1b8),
     UINT64_C(0x19a4c116b8d2d0c8), UINT64_C(0x1e376c085141ab53),
     UINT64_C(0x2748774cdf8eeb99), UINT64_C(0x34b0bcb5e19b48a8),
     UINT64_C(0x391c0cb3c5c95a63), UINT64_C(0x4ed8aa4ae3418acb),
     UINT64_C(0x5b9cca4f7763e373), UINT64_C(0x682e6ff3d6b2b8a3),
     UINT64_C(0x748f82ee5defb2fc), UINT64_C(0x78a5636f43172f60),
     UINT64_C(0x84c87814a1f0ab72), UINT64_C(0x8cc702081a6439ec),
     UINT64_C(0x90befffa23631e28), UINT64_C(0xa4506cebde82bde9),
     UINT64_C(0xbef9a3f7b2c67915), UINT64_C(0xc67178f2e372532b),
     UINT64_C(0xca273eceea26619c), UINT64_C(0xd186b8c721c0c207),
     UINT64_C(0xeada7dd6cde0eb1e), UINT64_C(0xf57d4f7fee6ed178),
     UINT64_C(0x06f067aa72176fba), UINT64_C(0x0a637dc5a2c898a6),
     UINT64_C(0x113f9804bef90dae), UINT64_C(0x1b710b35131c471b),
     UINT64_C(0x28db77f523047d84), UINT64_C(0x32caab7b40c72493),
     UINT64_C(0x3c9ebe0a15c9bebc), UINT64_C(0x431d67c49c100d4c),
     UINT64_C(0x4cc5d4becb3e42b6), UINT64_C(0x597f299cfc657e2a),
     UINT64_C(0x5fcb6fab3ad6faec), UINT64_C(0x6c44198c4a475817),
 };

 #define Sigma0(x)                                        \
   (CRYPTO_rotr_u64((x), 28) ^ CRYPTO_rotr_u64((x), 34) ^ \
    CRYPTO_rotr_u64((x), 39))
 #define Sigma1(x)                                        \
   (CRYPTO_rotr_u64((x), 14) ^ CRYPTO_rotr_u64((x), 18) ^ \
    CRYPTO_rotr_u64((x), 41))
 #define sigma0(x) \
   (CRYPTO_rotr_u64((x), 1) ^ CRYPTO_rotr_u64((x), 8) ^ ((x) >> 7))
 #define sigma1(x) \
   (CRYPTO_rotr_u64((x), 19) ^ CRYPTO_rotr_u64((x), 61) ^ ((x) >> 6))

 #define Ch(x, y, z) (((x) & (y)) ^ ((~(x)) & (z)))
 #define Maj(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))


 #if defined(__i386) || defined(__i386__) || defined(_M_IX86)
 // This code should give better results on 32-bit CPU with less than
 // ~24 registers, both size and performance wise...
 static void sha512_block_data_order_nohw(uint64_t state[8], const uint8_t *in,
                                          size_t num) {
   uint64_t A, E, T;
   uint64_t X[9 + 80], *F;
   int i;

   while (num--) {
     F = X + 80;
     A = state[0];
     F[1] = state[1];
     F[2] = state[2];
     F[3] = state[3];
     E = state[4];
     F[5] = state[5];
     F[6] = state[6];
     F[7] = state[7];

     for (i = 0; i < 16; i++, F--) {
       T = CRYPTO_load_u64_be(in + i * 8);
       F[0] = A;
       F[4] = E;
       F[8] = T;
       T += F[7] + Sigma1(E) + Ch(E, F[5], F[6]) + K512[i];
       E = F[3] + T;
       A = T + Sigma0(A) + Maj(A, F[1], F[2]);
     }

     for (; i < 80; i++, F--) {
       T = sigma0(F[8 + 16 - 1]);
       T += sigma1(F[8 + 16 - 14]);
       T += F[8 + 16] + F[8 + 16 - 9];

       F[0] = A;
       F[4] = E;
       F[8] = T;
       T += F[7] + Sigma1(E) + Ch(E, F[5], F[6]) + K512[i];
       E = F[3] + T;
       A = T + Sigma0(A) + Maj(A, F[1], F[2]);
     }

     state[0] += A;
     state[1] += F[1];
     state[2] += F[2];
     state[3] += F[3];
     state[4] += E;
     state[5] += F[5];
     state[6] += F[6];
     state[7] += F[7];

     in += 16 * 8;
   }
 }

 #else

 #define ROUND_00_15(i, a, b, c, d, e, f, g, h)   \
   do {                                           \
     T1 += h + Sigma1(e) + Ch(e, f, g) + K512[i]; \
     h = Sigma0(a) + Maj(a, b, c);                \
     d += T1;                                     \
     h += T1;                                     \
   } while (0)

 #define ROUND_16_80(i, j, a, b, c, d, e, f, g, h, X)   \
   do {                                                 \
     s0 = X[(j + 1) & 0x0f];                            \
     s0 = sigma0(s0);                                   \
     s1 = X[(j + 14) & 0x0f];                           \
     s1 = sigma1(s1);                                   \
     T1 = X[(j) & 0x0f] += s0 + s1 + X[(j + 9) & 0x0f]; \
     ROUND_00_15(i + j, a, b, c, d, e, f, g, h);        \
   } while (0)

 static void sha512_block_data_order_nohw(uint64_t state[8], const uint8_t *in,
                                          size_t num) {
   uint64_t a, b, c, d, e, f, g, h, s0, s1, T1;
   uint64_t X[16];
   int i;

   while (num--) {
     a = state[0];
     b = state[1];
     c = state[2];
     d = state[3];
     e = state[4];
     f = state[5];
     g = state[6];
     h = state[7];

     T1 = X[0] = CRYPTO_load_u64_be(in);
     ROUND_00_15(0, a, b, c, d, e, f, g, h);
     T1 = X[1] = CRYPTO_load_u64_be(in + 8);
     ROUND_00_15(1, h, a, b, c, d, e, f, g);
     T1 = X[2] = CRYPTO_load_u64_be(in + 2 * 8);
     ROUND_00_15(2, g, h, a, b, c, d, e, f);
     T1 = X[3] = CRYPTO_load_u64_be(in + 3 * 8);
     ROUND_00_15(3, f, g, h, a, b, c, d, e);
     T1 = X[4] = CRYPTO_load_u64_be(in + 4 * 8);
     ROUND_00_15(4, e, f, g, h, a, b, c, d);
     T1 = X[5] = CRYPTO_load_u64_be(in + 5 * 8);
     ROUND_00_15(5, d, e, f, g, h, a, b, c);
     T1 = X[6] = CRYPTO_load_u64_be(in + 6 * 8);
     ROUND_00_15(6, c, d, e, f, g, h, a, b);
     T1 = X[7] = CRYPTO_load_u64_be(in + 7 * 8);
     ROUND_00_15(7, b, c, d, e, f, g, h, a);
     T1 = X[8] = CRYPTO_load_u64_be(in + 8 * 8);
     ROUND_00_15(8, a, b, c, d, e, f, g, h);
     T1 = X[9] = CRYPTO_load_u64_be(in + 9 * 8);
     ROUND_00_15(9, h, a, b, c, d, e, f, g);
     T1 = X[10] = CRYPTO_load_u64_be(in + 10 * 8);
     ROUND_00_15(10, g, h, a, b, c, d, e, f);
     T1 = X[11] = CRYPTO_load_u64_be(in + 11 * 8);
     ROUND_00_15(11, f, g, h, a, b, c, d, e);
     T1 = X[12] = CRYPTO_load_u64_be(in + 12 * 8);
     ROUND_00_15(12, e, f, g, h, a, b, c, d);
     T1 = X[13] = CRYPTO_load_u64_be(in + 13 * 8);
     ROUND_00_15(13, d, e, f, g, h, a, b, c);
     T1 = X[14] = CRYPTO_load_u64_be(in + 14 * 8);
     ROUND_00_15(14, c, d, e, f, g, h, a, b);
     T1 = X[15] = CRYPTO_load_u64_be(in + 15 * 8);
     ROUND_00_15(15, b, c, d, e, f, g, h, a);

     for (i = 16; i < 80; i += 16) {
       ROUND_16_80(i, 0, a, b, c, d, e, f, g, h, X);
       ROUND_16_80(i, 1, h, a, b, c, d, e, f, g, X);
       ROUND_16_80(i, 2, g, h, a, b, c, d, e, f, X);
       ROUND_16_80(i, 3, f, g, h, a, b, c, d, e, X);
       ROUND_16_80(i, 4, e, f, g, h, a, b, c, d, X);
       ROUND_16_80(i, 5, d, e, f, g, h, a, b, c, X);
       ROUND_16_80(i, 6, c, d, e, f, g, h, a, b, X);
       ROUND_16_80(i, 7, b, c, d, e, f, g, h, a, X);
       ROUND_16_80(i, 8, a, b, c, d, e, f, g, h, X);
       ROUND_16_80(i, 9, h, a, b, c, d, e, f, g, X);
       ROUND_16_80(i, 10, g, h, a, b, c, d, e, f, X);
       ROUND_16_80(i, 11, f, g, h, a, b, c, d, e, X);
       ROUND_16_80(i, 12, e, f, g, h, a, b, c, d, X);
       ROUND_16_80(i, 13, d, e, f, g, h, a, b, c, X);
       ROUND_16_80(i, 14, c, d, e, f, g, h, a, b, X);
       ROUND_16_80(i, 15, b, c, d, e, f, g, h, a, X);
     }

     state[0] += a;
     state[1] += b;
     state[2] += c;
     state[3] += d;
     state[4] += e;
     state[5] += f;
     state[6] += g;
     state[7] += h;

     in += 16 * 8;
   }
 }

 #endif

 #endif  // !SHA512_ASM_NOHW

 static void sha512_block_data_order(uint64_t state[8], const uint8_t *data,
                                     size_t num) {
 #if defined(SHA512_ASM_HW)
   if (sha512_hw_capable()) {
     sha512_block_data_order_hw(state, data, num);
     return;
   }
 #endif
 #if defined(SHA512_ASM_AVX)
   if (sha512_avx_capable()) {
     sha512_block_data_order_avx(state, data, num);
     return;
   }
 #endif
 #if defined(SHA512_ASM_SSSE3)
   if (sha512_ssse3_capable()) {
     sha512_block_data_order_ssse3(state, data, num);
     return;
   }
 #endif
 #if defined(SHA512_ASM_NEON)
   if (CRYPTO_is_NEON_capable()) {
     sha512_block_data_order_neon(state, data, num);
     return;
   }
 #endif
   sha512_block_data_order_nohw(state, data, num);
 }

 #endif  // !SHA512_ASM

 #undef Sigma0
 #undef Sigma1
 #undef sigma0
 #undef sigma1
 #undef Ch
 #undef Maj
 #undef ROUND_00_15
 #undef ROUND_16_80
	// Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// https://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include <string.h>

	#include <openssl/mem.h>

	#include "../../internal.h"
	#include "../bcm_interface.h"
	#include "../service_indicator/internal.h"
	#include "internal.h"


	// The 32-bit hash algorithms share a common byte-order neutral collector and
	// padding function implementations that operate on unaligned data,
	// ../digest/md32_common.h. SHA-512 is the only 64-bit hash algorithm, as of
	// this writing, so there is no need for a common collector/padding
	// implementation yet.

	static void sha512_final_impl(uint8_t out, size_t md_len, SHA512_CTX sha);

	bcm_infallible BCM_sha384_init(SHA512_CTX *sha) {
	sha->h[0] = UINT64_C(0xcbbb9d5dc1059ed8);
	sha->h[1] = UINT64_C(0x629a292a367cd507);
	sha->h[2] = UINT64_C(0x9159015a3070dd17);
	sha->h[3] = UINT64_C(0x152fecd8f70e5939);
	sha->h[4] = UINT64_C(0x67332667ffc00b31);
	sha->h[5] = UINT64_C(0x8eb44a8768581511);
	sha->h[6] = UINT64_C(0xdb0c2e0d64f98fa7);
	sha->h[7] = UINT64_C(0x47b5481dbefa4fa4);

	sha->bytes_so_far_low = 0;
	sha->bytes_so_far_high = 0;
	sha->num = 0;
	sha->md_len = BCM_SHA384_DIGEST_LENGTH;
	return bcm_infallible::approved;
	}


	bcm_infallible BCM_sha512_init(SHA512_CTX *sha) {
	sha->h[0] = UINT64_C(0x6a09e667f3bcc908);
	sha->h[1] = UINT64_C(0xbb67ae8584caa73b);
	sha->h[2] = UINT64_C(0x3c6ef372fe94f82b);
	sha->h[3] = UINT64_C(0xa54ff53a5f1d36f1);
	sha->h[4] = UINT64_C(0x510e527fade682d1);
	sha->h[5] = UINT64_C(0x9b05688c2b3e6c1f);
	sha->h[6] = UINT64_C(0x1f83d9abfb41bd6b);
	sha->h[7] = UINT64_C(0x5be0cd19137e2179);

	sha->bytes_so_far_low = 0;
	sha->bytes_so_far_high = 0;
	sha->num = 0;
	sha->md_len = BCM_SHA512_DIGEST_LENGTH;
	return bcm_infallible::approved;
	}

	bcm_infallible BCM_sha512_256_init(SHA512_CTX *sha) {
	sha->h[0] = UINT64_C(0x22312194fc2bf72c);
	sha->h[1] = UINT64_C(0x9f555fa3c84c64c2);
	sha->h[2] = UINT64_C(0x2393b86b6f53b151);
	sha->h[3] = UINT64_C(0x963877195940eabd);
	sha->h[4] = UINT64_C(0x96283ee2a88effe3);
	sha->h[5] = UINT64_C(0xbe5e1e2553863992);
	sha->h[6] = UINT64_C(0x2b0199fc2c85b8aa);
	sha->h[7] = UINT64_C(0x0eb72ddc81c52ca2);

	sha->bytes_so_far_low = 0;
	sha->bytes_so_far_high = 0;
	sha->num = 0;
	sha->md_len = BCM_SHA512_256_DIGEST_LENGTH;
	return bcm_infallible::approved;
	}

	#if !defined(SHA512_ASM)
	static void sha512_block_data_order(uint64_t state[8], const uint8_t *in,
	size_t num_blocks);
	#endif


	bcm_infallible BCM_sha384_final(uint8_t out[BCM_SHA384_DIGEST_LENGTH],
	SHA512_CTX *sha) {
	// This function must be paired with \|BCM_sha384_init\|, which sets
	// \|sha->md_len\| to \|BCM_SHA384_DIGEST_LENGTH\|.
	assert(sha->md_len == BCM_SHA384_DIGEST_LENGTH);
	sha512_final_impl(out, BCM_SHA384_DIGEST_LENGTH, sha);
	return bcm_infallible::approved;
	}

	bcm_infallible BCM_sha384_update(SHA512_CTX sha, const void data,
	size_t len) {
	return BCM_sha512_update(sha, data, len);
	}

	bcm_infallible BCM_sha512_256_update(SHA512_CTX sha, const void data,
	size_t len) {
	return BCM_sha512_update(sha, data, len);
	}

	bcm_infallible BCM_sha512_256_final(uint8_t out[BCM_SHA512_256_DIGEST_LENGTH],
	SHA512_CTX *sha) {
	// This function must be paired with \|BCM_sha512_256_init\|, which sets
	// \|sha->md_len\| to \|BCM_SHA512_256_DIGEST_LENGTH\|.
	assert(sha->md_len == BCM_SHA512_256_DIGEST_LENGTH);
	sha512_final_impl(out, BCM_SHA512_256_DIGEST_LENGTH, sha);
	return bcm_infallible::approved;
	}

	bcm_infallible BCM_sha512_transform(SHA512_CTX *c,
	const uint8_t block[SHA512_CBLOCK]) {
	sha512_block_data_order(c->h, block, 1);
	return bcm_infallible::approved;
	}

	bcm_infallible BCM_sha512_update(SHA512_CTX c, const void in_data,
	size_t len) {
	uint8_t *p = c->p;
	const uint8_t data = reinterpret_cast<const uint8_t >(in_data);

	if (len == 0) {
	return bcm_infallible::approved;
	}

	c->bytes_so_far_low += len;
	if (c->bytes_so_far_low < len) {
	c->bytes_so_far_high++;
	}

	if (c->num != 0) {
	size_t n = sizeof(c->p) - c->num;

	if (len < n) {
	OPENSSL_memcpy(p + c->num, data, len);
	c->num += (unsigned int)len;
	return bcm_infallible::approved;
	} else {
	OPENSSL_memcpy(p + c->num, data, n), c->num = 0;
	len -= n;
	data += n;
	sha512_block_data_order(c->h, p, 1);
	}
	}

	if (len >= sizeof(c->p)) {
	sha512_block_data_order(c->h, data, len / sizeof(c->p));
	data += len;
	len %= sizeof(c->p);
	data -= len;
	}

	if (len != 0) {
	OPENSSL_memcpy(p, data, len);
	c->num = (int)len;
	}

	return bcm_infallible::approved;
	}

	bcm_infallible BCM_sha512_final(uint8_t out[BCM_SHA512_DIGEST_LENGTH],
	SHA512_CTX *sha) {
	// Ideally we would assert \|sha->md_len\| is \|BCM_SHA512_DIGEST_LENGTH\| to
	// match the size hint, but calling code often pairs \|BCM_sha384_init\| with
	// \|BCM_sha512_final\| and expects \|sha->md_len\| to carry the size over.
	//
	// TODO(davidben): Add an assert and fix code to match them up.
	sha512_final_impl(out, sha->md_len, sha);
	return bcm_infallible::approved;
	}

	static void sha512_final_impl(uint8_t out, size_t md_len, SHA512_CTX sha) {
	uint8_t *p = sha->p;
	size_t n = sha->num;

	p[n] = 0x80; // There always is a room for one
	n++;
	if (n > (sizeof(sha->p) - 16)) {
	OPENSSL_memset(p + n, 0, sizeof(sha->p) - n);
	n = 0;
	sha512_block_data_order(sha->h, p, 1);
	}

	OPENSSL_memset(p + n, 0, sizeof(sha->p) - 16 - n);
	const uint64_t Nh = (uint64_t{sha->bytes_so_far_high} << 3) \|
	(sha->bytes_so_far_low >> (64 - 3));
	const uint64_t Nl = sha->bytes_so_far_low << 3;
	CRYPTO_store_u64_be(p + sizeof(sha->p) - 16, Nh);
	CRYPTO_store_u64_be(p + sizeof(sha->p) - 8, Nl);

	sha512_block_data_order(sha->h, p, 1);

	assert(md_len % 8 == 0);
	const size_t out_words = md_len / 8;
	for (size_t i = 0; i < out_words; i++) {
	CRYPTO_store_u64_be(out, sha->h[i]);
	out += 8;
	}

	FIPS_service_indicator_update_state();
	}

	#if !defined(SHA512_ASM)

	#if !defined(SHA512_ASM_NOHW)
	static const uint64_t K512[80] = {
	UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd),
	UINT64_C(0xb5c0fbcfec4d3b2f), UINT64_C(0xe9b5dba58189dbbc),
	UINT64_C(0x3956c25bf348b538), UINT64_C(0x59f111f1b605d019),
	UINT64_C(0x923f82a4af194f9b), UINT64_C(0xab1c5ed5da6d8118),
	UINT64_C(0xd807aa98a3030242), UINT64_C(0x12835b0145706fbe),
	UINT64_C(0x243185be4ee4b28c), UINT64_C(0x550c7dc3d5ffb4e2),
	UINT64_C(0x72be5d74f27b896f), UINT64_C(0x80deb1fe3b1696b1),
	UINT64_C(0x9bdc06a725c71235), UINT64_C(0xc19bf174cf692694),
	UINT64_C(0xe49b69c19ef14ad2), UINT64_C(0xefbe4786384f25e3),
	UINT64_C(0x0fc19dc68b8cd5b5), UINT64_C(0x240ca1cc77ac9c65),
	UINT64_C(0x2de92c6f592b0275), UINT64_C(0x4a7484aa6ea6e483),
	UINT64_C(0x5cb0a9dcbd41fbd4), UINT64_C(0x76f988da831153b5),
	UINT64_C(0x983e5152ee66dfab), UINT64_C(0xa831c66d2db43210),
	UINT64_C(0xb00327c898fb213f), UINT64_C(0xbf597fc7beef0ee4),
	UINT64_C(0xc6e00bf33da88fc2), UINT64_C(0xd5a79147930aa725),
	UINT64_C(0x06ca6351e003826f), UINT64_C(0x142929670a0e6e70),
	UINT64_C(0x27b70a8546d22ffc), UINT64_C(0x2e1b21385c26c926),
	UINT64_C(0x4d2c6dfc5ac42aed), UINT64_C(0x53380d139d95b3df),
	UINT64_C(0x650a73548baf63de), UINT64_C(0x766a0abb3c77b2a8),
	UINT64_C(0x81c2c92e47edaee6), UINT64_C(0x92722c851482353b),
	UINT64_C(0xa2bfe8a14cf10364), UINT64_C(0xa81a664bbc423001),
	UINT64_C(0xc24b8b70d0f89791), UINT64_C(0xc76c51a30654be30),
	UINT64_C(0xd192e819d6ef5218), UINT64_C(0xd69906245565a910),
	UINT64_C(0xf40e35855771202a), UINT64_C(0x106aa07032bbd1b8),
	UINT64_C(0x19a4c116b8d2d0c8), UINT64_C(0x1e376c085141ab53),
	UINT64_C(0x2748774cdf8eeb99), UINT64_C(0x34b0bcb5e19b48a8),
	UINT64_C(0x391c0cb3c5c95a63), UINT64_C(0x4ed8aa4ae3418acb),
	UINT64_C(0x5b9cca4f7763e373), UINT64_C(0x682e6ff3d6b2b8a3),
	UINT64_C(0x748f82ee5defb2fc), UINT64_C(0x78a5636f43172f60),
	UINT64_C(0x84c87814a1f0ab72), UINT64_C(0x8cc702081a6439ec),
	UINT64_C(0x90befffa23631e28), UINT64_C(0xa4506cebde82bde9),
	UINT64_C(0xbef9a3f7b2c67915), UINT64_C(0xc67178f2e372532b),
	UINT64_C(0xca273eceea26619c), UINT64_C(0xd186b8c721c0c207),
	UINT64_C(0xeada7dd6cde0eb1e), UINT64_C(0xf57d4f7fee6ed178),
	UINT64_C(0x06f067aa72176fba), UINT64_C(0x0a637dc5a2c898a6),
	UINT64_C(0x113f9804bef90dae), UINT64_C(0x1b710b35131c471b),
	UINT64_C(0x28db77f523047d84), UINT64_C(0x32caab7b40c72493),
	UINT64_C(0x3c9ebe0a15c9bebc), UINT64_C(0x431d67c49c100d4c),
	UINT64_C(0x4cc5d4becb3e42b6), UINT64_C(0x597f299cfc657e2a),
	UINT64_C(0x5fcb6fab3ad6faec), UINT64_C(0x6c44198c4a475817),
	};

	#define Sigma0(x) \
	(CRYPTO_rotr_u64((x), 28) ^ CRYPTO_rotr_u64((x), 34) ^ \
	CRYPTO_rotr_u64((x), 39))
	#define Sigma1(x) \
	(CRYPTO_rotr_u64((x), 14) ^ CRYPTO_rotr_u64((x), 18) ^ \
	CRYPTO_rotr_u64((x), 41))
	#define sigma0(x) \
	(CRYPTO_rotr_u64((x), 1) ^ CRYPTO_rotr_u64((x), 8) ^ ((x) >> 7))
	#define sigma1(x) \
	(CRYPTO_rotr_u64((x), 19) ^ CRYPTO_rotr_u64((x), 61) ^ ((x) >> 6))

	#define Ch(x, y, z) (((x) & (y)) ^ ((~(x)) & (z)))
	#define Maj(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))


	#if defined(__i386) \|\| defined(__i386__) \|\| defined(_M_IX86)
	// This code should give better results on 32-bit CPU with less than
	// ~24 registers, both size and performance wise...
	static void sha512_block_data_order_nohw(uint64_t state[8], const uint8_t *in,
	size_t num) {
	uint64_t A, E, T;
	uint64_t X[9 + 80], *F;
	int i;

	while (num--) {
	F = X + 80;
	A = state[0];
	F[1] = state[1];
	F[2] = state[2];
	F[3] = state[3];
	E = state[4];
	F[5] = state[5];
	F[6] = state[6];
	F[7] = state[7];

	for (i = 0; i < 16; i++, F--) {
	T = CRYPTO_load_u64_be(in + i * 8);
	F[0] = A;
	F[4] = E;
	F[8] = T;
	T += F[7] + Sigma1(E) + Ch(E, F[5], F[6]) + K512[i];
	E = F[3] + T;
	A = T + Sigma0(A) + Maj(A, F[1], F[2]);
	}

	for (; i < 80; i++, F--) {
	T = sigma0(F[8 + 16 - 1]);
	T += sigma1(F[8 + 16 - 14]);
	T += F[8 + 16] + F[8 + 16 - 9];

	F[0] = A;
	F[4] = E;
	F[8] = T;
	T += F[7] + Sigma1(E) + Ch(E, F[5], F[6]) + K512[i];
	E = F[3] + T;
	A = T + Sigma0(A) + Maj(A, F[1], F[2]);
	}

	state[0] += A;
	state[1] += F[1];
	state[2] += F[2];
	state[3] += F[3];
	state[4] += E;
	state[5] += F[5];
	state[6] += F[6];
	state[7] += F[7];

	in += 16 * 8;
	}
	}

	#else

	#define ROUND_00_15(i, a, b, c, d, e, f, g, h) \
	do { \
	T1 += h + Sigma1(e) + Ch(e, f, g) + K512[i]; \
	h = Sigma0(a) + Maj(a, b, c); \
	d += T1; \
	h += T1; \
	} while (0)

	#define ROUND_16_80(i, j, a, b, c, d, e, f, g, h, X) \
	do { \
	s0 = X[(j + 1) & 0x0f]; \
	s0 = sigma0(s0); \
	s1 = X[(j + 14) & 0x0f]; \
	s1 = sigma1(s1); \
	T1 = X[(j) & 0x0f] += s0 + s1 + X[(j + 9) & 0x0f]; \
	ROUND_00_15(i + j, a, b, c, d, e, f, g, h); \
	} while (0)

	static void sha512_block_data_order_nohw(uint64_t state[8], const uint8_t *in,
	size_t num) {
	uint64_t a, b, c, d, e, f, g, h, s0, s1, T1;
	uint64_t X[16];
	int i;

	while (num--) {
	a = state[0];
	b = state[1];
	c = state[2];
	d = state[3];
	e = state[4];
	f = state[5];
	g = state[6];
	h = state[7];

	T1 = X[0] = CRYPTO_load_u64_be(in);
	ROUND_00_15(0, a, b, c, d, e, f, g, h);
	T1 = X[1] = CRYPTO_load_u64_be(in + 8);
	ROUND_00_15(1, h, a, b, c, d, e, f, g);
	T1 = X[2] = CRYPTO_load_u64_be(in + 2 * 8);
	ROUND_00_15(2, g, h, a, b, c, d, e, f);
	T1 = X[3] = CRYPTO_load_u64_be(in + 3 * 8);
	ROUND_00_15(3, f, g, h, a, b, c, d, e);
	T1 = X[4] = CRYPTO_load_u64_be(in + 4 * 8);
	ROUND_00_15(4, e, f, g, h, a, b, c, d);
	T1 = X[5] = CRYPTO_load_u64_be(in + 5 * 8);
	ROUND_00_15(5, d, e, f, g, h, a, b, c);
	T1 = X[6] = CRYPTO_load_u64_be(in + 6 * 8);
	ROUND_00_15(6, c, d, e, f, g, h, a, b);
	T1 = X[7] = CRYPTO_load_u64_be(in + 7 * 8);
	ROUND_00_15(7, b, c, d, e, f, g, h, a);
	T1 = X[8] = CRYPTO_load_u64_be(in + 8 * 8);
	ROUND_00_15(8, a, b, c, d, e, f, g, h);
	T1 = X[9] = CRYPTO_load_u64_be(in + 9 * 8);
	ROUND_00_15(9, h, a, b, c, d, e, f, g);
	T1 = X[10] = CRYPTO_load_u64_be(in + 10 * 8);
	ROUND_00_15(10, g, h, a, b, c, d, e, f);
	T1 = X[11] = CRYPTO_load_u64_be(in + 11 * 8);
	ROUND_00_15(11, f, g, h, a, b, c, d, e);
	T1 = X[12] = CRYPTO_load_u64_be(in + 12 * 8);
	ROUND_00_15(12, e, f, g, h, a, b, c, d);
	T1 = X[13] = CRYPTO_load_u64_be(in + 13 * 8);
	ROUND_00_15(13, d, e, f, g, h, a, b, c);
	T1 = X[14] = CRYPTO_load_u64_be(in + 14 * 8);
	ROUND_00_15(14, c, d, e, f, g, h, a, b);
	T1 = X[15] = CRYPTO_load_u64_be(in + 15 * 8);
	ROUND_00_15(15, b, c, d, e, f, g, h, a);

	for (i = 16; i < 80; i += 16) {
	ROUND_16_80(i, 0, a, b, c, d, e, f, g, h, X);
	ROUND_16_80(i, 1, h, a, b, c, d, e, f, g, X);
	ROUND_16_80(i, 2, g, h, a, b, c, d, e, f, X);
	ROUND_16_80(i, 3, f, g, h, a, b, c, d, e, X);
	ROUND_16_80(i, 4, e, f, g, h, a, b, c, d, X);
	ROUND_16_80(i, 5, d, e, f, g, h, a, b, c, X);
	ROUND_16_80(i, 6, c, d, e, f, g, h, a, b, X);
	ROUND_16_80(i, 7, b, c, d, e, f, g, h, a, X);
	ROUND_16_80(i, 8, a, b, c, d, e, f, g, h, X);
	ROUND_16_80(i, 9, h, a, b, c, d, e, f, g, X);
	ROUND_16_80(i, 10, g, h, a, b, c, d, e, f, X);
	ROUND_16_80(i, 11, f, g, h, a, b, c, d, e, X);
	ROUND_16_80(i, 12, e, f, g, h, a, b, c, d, X);
	ROUND_16_80(i, 13, d, e, f, g, h, a, b, c, X);
	ROUND_16_80(i, 14, c, d, e, f, g, h, a, b, X);
	ROUND_16_80(i, 15, b, c, d, e, f, g, h, a, X);
	}

	state[0] += a;
	state[1] += b;
	state[2] += c;
	state[3] += d;
	state[4] += e;
	state[5] += f;
	state[6] += g;
	state[7] += h;

	in += 16 * 8;
	}
	}

	#endif

	#endif // !SHA512_ASM_NOHW

	static void sha512_block_data_order(uint64_t state[8], const uint8_t *data,
	size_t num) {
	#if defined(SHA512_ASM_HW)
	if (sha512_hw_capable()) {
	sha512_block_data_order_hw(state, data, num);
	return;
	}
	#endif
	#if defined(SHA512_ASM_AVX)
	if (sha512_avx_capable()) {
	sha512_block_data_order_avx(state, data, num);
	return;
	}
	#endif
	#if defined(SHA512_ASM_SSSE3)
	if (sha512_ssse3_capable()) {
	sha512_block_data_order_ssse3(state, data, num);
	return;
	}
	#endif
	#if defined(SHA512_ASM_NEON)
	if (CRYPTO_is_NEON_capable()) {
	sha512_block_data_order_neon(state, data, num);
	return;
	}
	#endif
	sha512_block_data_order_nohw(state, data, num);
	}

	#endif // !SHA512_ASM

	#undef Sigma0
	#undef Sigma1
	#undef sigma0
	#undef sigma1
	#undef Ch
	#undef Maj
	#undef ROUND_00_15
	#undef ROUND_16_80