sha2.c

#define UNROLL_LOOPS /* Enable loops unrolling */
#undef max
#undef min
#include <string.h>
#include "sha2.h"

void sha224_init(sha224_ctx *);
void sha224_update(sha224_ctx *, const unsigned char *, unsigned int);
void sha224_final(sha224_ctx *, unsigned char *);
void sha224(const unsigned char *, unsigned int, unsigned char *);

void sha256_init(sha256_ctx * ctx);
void sha256_update(sha256_ctx *, const unsigned char *, unsigned int);
void sha256_final(sha256_ctx *, unsigned char *);
void sha256(const unsigned char *, unsigned int, unsigned char *);

void sha384_init(sha384_ctx *);
void sha384_update(sha384_ctx *, const unsigned char *, unsigned int);
void sha384_final(sha384_ctx *, unsigned char *);
void sha384(const unsigned char *, unsigned int, unsigned char *);

void sha512_init(sha512_ctx *);
void sha512_update(sha512_ctx *, const unsigned char *, unsigned int);
void sha512_final(sha512_ctx *, unsigned char *);
void sha512(const unsigned char *, unsigned int, unsigned char *);

inline uint32 sha224_h0[8] = {
  0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939, 0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4
};

inline uint32 sha256_h0[8] = {
  0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
};

inline uint64 sha384_h0[8] = {
  0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL, 0x9159015a3070dd17ULL, 0x152fecd8f70e5939ULL,
  0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL, 0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL
};

inline uint64 sha512_h0[8] = {
  0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
  0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL, 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
};

inline uint32 sha256_k[64] = {
  0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
  0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
  0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
  0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
  0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
  0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
  0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
  0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
};

inline uint64 sha512_k[80] = {
  0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
  0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
  0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
  0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
  0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
  0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
  0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
  0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
  0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
  0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
  0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
  0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
  0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
  0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
  0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
  0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
  0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
  0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
  0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
  0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
};

#define SHFR(x, n) (x >> n)
#define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
#define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
#define CH(x, y, z) ((x & y) ^ (~x & z))
#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
#define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
#define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))

#define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
#define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
#define SHA512_F3(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHFR(x, 7))
#define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x, 6))

#define UNPACK32(x, str) { \
    *((str) + 3) = (uint8) ((x)); \
    *((str) + 2) = (uint8) ((x) >> 8); \
    *((str) + 1) = (uint8) ((x) >> 16); \
    *((str) + 0) = (uint8) ((x) >> 24); \
  }

#define PACK32(str, x) { \
    *(x) = ((uint32) *((str) + 3)) | ((uint32) *((str) + 2) << 8) | ((uint32) *((str) + 1) << 16) | ((uint32) *((str) + 0) << 24); \
  }

#define UNPACK64(x, str) { \
    *((str) + 7) = (uint8) ((x)); \
    *((str) + 6) = (uint8) ((x) >> 8); \
    *((str) + 5) = (uint8) ((x) >> 16); \
    *((str) + 4) = (uint8) ((x) >> 24); \
    *((str) + 3) = (uint8) ((x) >> 32); \
    *((str) + 2) = (uint8) ((x) >> 40); \
    *((str) + 1) = (uint8) ((x) >> 48); \
    *((str) + 0) = (uint8) ((x) >> 56); \
  }

#define PACK64(str, x) { \
    *(x) = ((uint64) *((str) + 7)) \
           | ((uint64) *((str) + 6) << 8) \
           | ((uint64) *((str) + 5) << 16) \
           | ((uint64) *((str) + 4) << 24) \
           | ((uint64) *((str) + 3) << 32) \
           | ((uint64) *((str) + 2) << 40) \
           | ((uint64) *((str) + 1) << 48) \
           | ((uint64) *((str) + 0) << 56); \
  }

/* Macros used for loops unrolling */

#define SHA256_SCR(i) { w[i] = SHA256_F4(w[i - 2]) + w[i - 7] + SHA256_F3(w[i - 15]) + w[i - 16]; }
#define SHA512_SCR(i) { w[i] = SHA512_F4(w[i - 2]) + w[i - 7] + SHA512_F3(w[i - 15]) + w[i - 16]; }

#define SHA256_EXP(a, b, c, d, e, f, g, h, j) { \
    t1 = wv[h] + SHA256_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha256_k[j] + w[j]; \
    t2 = SHA256_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
    wv[d] += t1; \
    wv[h] = t1 + t2; \
  }

#define SHA512_EXP(a, b, c, d, e, f, g ,h, j) { \
    t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha512_k[j] + w[j]; \
    t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
    wv[d] += t1; \
    wv[h] = t1 + t2; \
  }

/* SHA-256 functions */

void sha256_transf(sha256_ctx *ctx, const unsigned char *message, unsigned int block_nb) {
  uint32 w[64];
  uint32 wv[8];
  uint32 t1, t2;
  const unsigned char *sub_block;
  int i;
#ifndef UNROLL_LOOPS
  int j;
#endif
  for (i = 0; i < (int) block_nb; i++) {
    sub_block = message + (i << 6);
#ifndef UNROLL_LOOPS
    for (j = 0; j < 16; j++) PACK32(&sub_block[j << 2], &w[j]);
    for (j = 16; j < 64; j++) SHA256_SCR(j);
    for (j = 0; j < 8; j++) wv[j] = ctx->h[j];
    for (j = 0; j < 64; j++) {
      t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] + w[j];
      t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
      wv[7] = wv[6];
      wv[6] = wv[5];
      wv[5] = wv[4];
      wv[4] = wv[3] + t1;
      wv[3] = wv[2];
      wv[2] = wv[1];
      wv[1] = wv[0];
      wv[0] = t1 + t2;
    }
    for (j = 0; j < 8; j++) ctx->h[j] += wv[j];
#else
    PACK32(&sub_block[ 0], &w[ 0]); PACK32(&sub_block[ 4], &w[ 1]);
    PACK32(&sub_block[ 8], &w[ 2]); PACK32(&sub_block[12], &w[ 3]);
    PACK32(&sub_block[16], &w[ 4]); PACK32(&sub_block[20], &w[ 5]);
    PACK32(&sub_block[24], &w[ 6]); PACK32(&sub_block[28], &w[ 7]);
    PACK32(&sub_block[32], &w[ 8]); PACK32(&sub_block[36], &w[ 9]);
    PACK32(&sub_block[40], &w[10]); PACK32(&sub_block[44], &w[11]);
    PACK32(&sub_block[48], &w[12]); PACK32(&sub_block[52], &w[13]);
    PACK32(&sub_block[56], &w[14]); PACK32(&sub_block[60], &w[15]);
    SHA256_SCR(16); SHA256_SCR(17); SHA256_SCR(18); SHA256_SCR(19);
    SHA256_SCR(20); SHA256_SCR(21); SHA256_SCR(22); SHA256_SCR(23);
    SHA256_SCR(24); SHA256_SCR(25); SHA256_SCR(26); SHA256_SCR(27);
    SHA256_SCR(28); SHA256_SCR(29); SHA256_SCR(30); SHA256_SCR(31);
    SHA256_SCR(32); SHA256_SCR(33); SHA256_SCR(34); SHA256_SCR(35);
    SHA256_SCR(36); SHA256_SCR(37); SHA256_SCR(38); SHA256_SCR(39);
    SHA256_SCR(40); SHA256_SCR(41); SHA256_SCR(42); SHA256_SCR(43);
    SHA256_SCR(44); SHA256_SCR(45); SHA256_SCR(46); SHA256_SCR(47);
    SHA256_SCR(48); SHA256_SCR(49); SHA256_SCR(50); SHA256_SCR(51);
    SHA256_SCR(52); SHA256_SCR(53); SHA256_SCR(54); SHA256_SCR(55);
    SHA256_SCR(56); SHA256_SCR(57); SHA256_SCR(58); SHA256_SCR(59);
    SHA256_SCR(60); SHA256_SCR(61); SHA256_SCR(62); SHA256_SCR(63);
    wv[0] = ctx->h[0]; wv[1] = ctx->h[1];
    wv[2] = ctx->h[2]; wv[3] = ctx->h[3];
    wv[4] = ctx->h[4]; wv[5] = ctx->h[5];
    wv[6] = ctx->h[6]; wv[7] = ctx->h[7];
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 0); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 1);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 2); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 3);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 4); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 5);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 6); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 7);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 8); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 9);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 10); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 11);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 12); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 13);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 14); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 15);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 16); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 17);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 18); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 19);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 20); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 21);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 22); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 23);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 24); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 25);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 26); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 27);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 28); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 29);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 30); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 31);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 32); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 33);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 34); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 35);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 36); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 37);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 38); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 39);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 40); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 41);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 42); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 43);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 44); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 45);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 46); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 47);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 48); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 49);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 50); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 51);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 52); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 53);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 54); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 55);
    SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 56); SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 57);
    SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 58); SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 59);
    SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 60); SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 61);
    SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 62); SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 63);
    ctx->h[0] += wv[0]; ctx->h[1] += wv[1];
    ctx->h[2] += wv[2]; ctx->h[3] += wv[3];
    ctx->h[4] += wv[4]; ctx->h[5] += wv[5];
    ctx->h[6] += wv[6]; ctx->h[7] += wv[7];
#endif /* !UNROLL_LOOPS */
  }
}

void sha256(const unsigned char *message, unsigned int len, unsigned char *digest) {
  sha256_ctx ctx;
  sha256_init(&ctx);
  sha256_update(&ctx, message, len);
  sha256_final(&ctx, digest);
}

void sha256_init(sha256_ctx *ctx) {
#ifndef UNROLL_LOOPS
  int i;
  for (i = 0; i < 8; i++) {
    ctx->h[i] = sha256_h0[i];
  }
#else
  ctx->h[0] = sha256_h0[0]; ctx->h[1] = sha256_h0[1];
  ctx->h[2] = sha256_h0[2]; ctx->h[3] = sha256_h0[3];
  ctx->h[4] = sha256_h0[4]; ctx->h[5] = sha256_h0[5];
  ctx->h[6] = sha256_h0[6]; ctx->h[7] = sha256_h0[7];
#endif /* !UNROLL_LOOPS */
  ctx->len = 0;
  ctx->tot_len = 0;
}

void sha256_update(sha256_ctx *ctx, const unsigned char *message, unsigned int len) {
  unsigned int block_nb;
  unsigned int new_len, rem_len, tmp_len;
  const unsigned char *shifted_message;
  tmp_len = SHA256_BLOCK_SIZE - ctx->len;
  rem_len = len < tmp_len ? len : tmp_len;
  memcpy(&ctx->block[ctx->len], message, rem_len);
  if (ctx->len + len < SHA256_BLOCK_SIZE) {
    ctx->len += len;
    return;
  }
  new_len = len - rem_len;
  block_nb = new_len / SHA256_BLOCK_SIZE;
  shifted_message = message + rem_len;
  sha256_transf(ctx, ctx->block, 1);
  sha256_transf(ctx, shifted_message, block_nb);
  rem_len = new_len % SHA256_BLOCK_SIZE;
  memcpy(ctx->block, &shifted_message[block_nb << 6], rem_len);
  ctx->len = rem_len;
  ctx->tot_len += (block_nb + 1) << 6;
}

void sha256_final(sha256_ctx *ctx, unsigned char *digest) {
  unsigned int block_nb;
  unsigned int pm_len;
  unsigned int len_b;
#ifndef UNROLL_LOOPS
  int i;
#endif
  block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) < (ctx->len % SHA256_BLOCK_SIZE)));
  len_b = (ctx->tot_len + ctx->len) << 3;
  pm_len = block_nb << 6;
  memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
  ctx->block[ctx->len] = 0x80;
  UNPACK32(len_b, ctx->block + pm_len - 4);
  sha256_transf(ctx, ctx->block, block_nb);
#ifndef UNROLL_LOOPS
  for (i = 0 ; i < 8; i++) {
    UNPACK32(ctx->h[i], &digest[i << 2]);
  }
#else
  UNPACK32(ctx->h[0], &digest[ 0]);
  UNPACK32(ctx->h[1], &digest[ 4]);
  UNPACK32(ctx->h[2], &digest[ 8]);
  UNPACK32(ctx->h[3], &digest[12]);
  UNPACK32(ctx->h[4], &digest[16]);
  UNPACK32(ctx->h[5], &digest[20]);
  UNPACK32(ctx->h[6], &digest[24]);
  UNPACK32(ctx->h[7], &digest[28]);
#endif /* !UNROLL_LOOPS */
}

/* SHA-512 functions */

void sha512_transf(sha512_ctx *ctx, const unsigned char *message, unsigned int block_nb) {
  uint64 w[80];
  uint64 wv[8];
  uint64 t1, t2;
  const unsigned char *sub_block;
  int i, j;
  for (i = 0; i < (int) block_nb; i++) {
    sub_block = message + (i << 7);
#ifndef UNROLL_LOOPS
    for (j = 0; j < 16; j++) {
      PACK64(&sub_block[j << 3], &w[j]);
    }
    for (j = 16; j < 80; j++) {
      SHA512_SCR(j);
    }
    for (j = 0; j < 8; j++) {
      wv[j] = ctx->h[j];
    }
    for (j = 0; j < 80; j++) {
      t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha512_k[j] + w[j];
      t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
      wv[7] = wv[6];
      wv[6] = wv[5];
      wv[5] = wv[4];
      wv[4] = wv[3] + t1;
      wv[3] = wv[2];
      wv[2] = wv[1];
      wv[1] = wv[0];
      wv[0] = t1 + t2;
    }
    for (j = 0; j < 8; j++) {
      ctx->h[j] += wv[j];
    }
#else
    PACK64(&sub_block[ 0], &w[ 0]); PACK64(&sub_block[ 8], &w[ 1]);
    PACK64(&sub_block[ 16], &w[ 2]); PACK64(&sub_block[ 24], &w[ 3]);
    PACK64(&sub_block[ 32], &w[ 4]); PACK64(&sub_block[ 40], &w[ 5]);
    PACK64(&sub_block[ 48], &w[ 6]); PACK64(&sub_block[ 56], &w[ 7]);
    PACK64(&sub_block[ 64], &w[ 8]); PACK64(&sub_block[ 72], &w[ 9]);
    PACK64(&sub_block[ 80], &w[10]); PACK64(&sub_block[ 88], &w[11]);
    PACK64(&sub_block[ 96], &w[12]); PACK64(&sub_block[104], &w[13]);
    PACK64(&sub_block[112], &w[14]); PACK64(&sub_block[120], &w[15]);
    SHA512_SCR(16); SHA512_SCR(17); SHA512_SCR(18); SHA512_SCR(19);
    SHA512_SCR(20); SHA512_SCR(21); SHA512_SCR(22); SHA512_SCR(23);
    SHA512_SCR(24); SHA512_SCR(25); SHA512_SCR(26); SHA512_SCR(27);
    SHA512_SCR(28); SHA512_SCR(29); SHA512_SCR(30); SHA512_SCR(31);
    SHA512_SCR(32); SHA512_SCR(33); SHA512_SCR(34); SHA512_SCR(35);
    SHA512_SCR(36); SHA512_SCR(37); SHA512_SCR(38); SHA512_SCR(39);
    SHA512_SCR(40); SHA512_SCR(41); SHA512_SCR(42); SHA512_SCR(43);
    SHA512_SCR(44); SHA512_SCR(45); SHA512_SCR(46); SHA512_SCR(47);
    SHA512_SCR(48); SHA512_SCR(49); SHA512_SCR(50); SHA512_SCR(51);
    SHA512_SCR(52); SHA512_SCR(53); SHA512_SCR(54); SHA512_SCR(55);
    SHA512_SCR(56); SHA512_SCR(57); SHA512_SCR(58); SHA512_SCR(59);
    SHA512_SCR(60); SHA512_SCR(61); SHA512_SCR(62); SHA512_SCR(63);
    SHA512_SCR(64); SHA512_SCR(65); SHA512_SCR(66); SHA512_SCR(67);
    SHA512_SCR(68); SHA512_SCR(69); SHA512_SCR(70); SHA512_SCR(71);
    SHA512_SCR(72); SHA512_SCR(73); SHA512_SCR(74); SHA512_SCR(75);
    SHA512_SCR(76); SHA512_SCR(77); SHA512_SCR(78); SHA512_SCR(79);
    wv[0] = ctx->h[0]; wv[1] = ctx->h[1];
    wv[2] = ctx->h[2]; wv[3] = ctx->h[3];
    wv[4] = ctx->h[4]; wv[5] = ctx->h[5];
    wv[6] = ctx->h[6]; wv[7] = ctx->h[7];
    j = 0;
    do {
      SHA512_EXP(0, 1, 2, 3, 4, 5, 6, 7, j); j++;
      SHA512_EXP(7, 0, 1, 2, 3, 4, 5, 6, j); j++;
      SHA512_EXP(6, 7, 0, 1, 2, 3, 4, 5, j); j++;
      SHA512_EXP(5, 6, 7, 0, 1, 2, 3, 4, j); j++;
      SHA512_EXP(4, 5, 6, 7, 0, 1, 2, 3, j); j++;
      SHA512_EXP(3, 4, 5, 6, 7, 0, 1, 2, j); j++;
      SHA512_EXP(2, 3, 4, 5, 6, 7, 0, 1, j); j++;
      SHA512_EXP(1, 2, 3, 4, 5, 6, 7, 0, j); j++;
    } while (j < 80);
    ctx->h[0] += wv[0]; ctx->h[1] += wv[1];
    ctx->h[2] += wv[2]; ctx->h[3] += wv[3];
    ctx->h[4] += wv[4]; ctx->h[5] += wv[5];
    ctx->h[6] += wv[6]; ctx->h[7] += wv[7];
#endif /* !UNROLL_LOOPS */
  }
}

void sha512(const unsigned char *message, unsigned int len, unsigned char *digest) {
  sha512_ctx ctx;
  sha512_init(&ctx);
  sha512_update(&ctx, message, len);
  sha512_final(&ctx, digest);
}

void sha512_init(sha512_ctx *ctx) {
#ifndef UNROLL_LOOPS
  int i;
  for (i = 0; i < 8; i++) {
    ctx->h[i] = sha512_h0[i];
  }
#else
  ctx->h[0] = sha512_h0[0]; ctx->h[1] = sha512_h0[1];
  ctx->h[2] = sha512_h0[2]; ctx->h[3] = sha512_h0[3];
  ctx->h[4] = sha512_h0[4]; ctx->h[5] = sha512_h0[5];
  ctx->h[6] = sha512_h0[6]; ctx->h[7] = sha512_h0[7];
#endif /* !UNROLL_LOOPS */
  ctx->len = 0;
  ctx->tot_len = 0;
}

void sha512_update(sha512_ctx *ctx, const unsigned char *message, unsigned int len) {
  unsigned int block_nb;
  unsigned int new_len, rem_len, tmp_len;
  const unsigned char *shifted_message;
  tmp_len = SHA512_BLOCK_SIZE - ctx->len;
  rem_len = len < tmp_len ? len : tmp_len;
  memcpy(&ctx->block[ctx->len], message, rem_len);
  if (ctx->len + len < SHA512_BLOCK_SIZE) {
    ctx->len += len;
    return;
  }
  new_len = len - rem_len;
  block_nb = new_len / SHA512_BLOCK_SIZE;
  shifted_message = message + rem_len;
  sha512_transf(ctx, ctx->block, 1);
  sha512_transf(ctx, shifted_message, block_nb);
  rem_len = new_len % SHA512_BLOCK_SIZE;
  memcpy(ctx->block, &shifted_message[block_nb << 7], rem_len);
  ctx->len = rem_len;
  ctx->tot_len += (block_nb + 1) << 7;
}

void sha512_final(sha512_ctx *ctx, unsigned char *digest) {
  unsigned int block_nb;
  unsigned int pm_len;
  unsigned int len_b;
#ifndef UNROLL_LOOPS
  int i;
#endif
  block_nb = 1 + ((SHA512_BLOCK_SIZE - 17) < (ctx->len % SHA512_BLOCK_SIZE));
  len_b = (ctx->tot_len + ctx->len) << 3;
  pm_len = block_nb << 7;
  memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
  ctx->block[ctx->len] = 0x80;
  UNPACK32(len_b, ctx->block + pm_len - 4);
  sha512_transf(ctx, ctx->block, block_nb);
#ifndef UNROLL_LOOPS
  for (i = 0 ; i < 8; i++) {
    UNPACK64(ctx->h[i], &digest[i << 3]);
  }
#else
  UNPACK64(ctx->h[0], &digest[ 0]);
  UNPACK64(ctx->h[1], &digest[ 8]);
  UNPACK64(ctx->h[2], &digest[16]);
  UNPACK64(ctx->h[3], &digest[24]);
  UNPACK64(ctx->h[4], &digest[32]);
  UNPACK64(ctx->h[5], &digest[40]);
  UNPACK64(ctx->h[6], &digest[48]);
  UNPACK64(ctx->h[7], &digest[56]);
#endif /* !UNROLL_LOOPS */
}

/* SHA-384 functions */

void sha384(const unsigned char *message, unsigned int len, unsigned char *digest) {
  sha384_ctx ctx;
  sha384_init(&ctx);
  sha384_update(&ctx, message, len);
  sha384_final(&ctx, digest);
}

void sha384_init(sha384_ctx *ctx) {
#ifndef UNROLL_LOOPS
  int i;
  for (i = 0; i < 8; i++) {
    ctx->h[i] = sha384_h0[i];
  }
#else
  ctx->h[0] = sha384_h0[0]; ctx->h[1] = sha384_h0[1];
  ctx->h[2] = sha384_h0[2]; ctx->h[3] = sha384_h0[3];
  ctx->h[4] = sha384_h0[4]; ctx->h[5] = sha384_h0[5];
  ctx->h[6] = sha384_h0[6]; ctx->h[7] = sha384_h0[7];
#endif /* !UNROLL_LOOPS */
  ctx->len = 0;
  ctx->tot_len = 0;
}

void sha384_update(sha384_ctx *ctx, const unsigned char *message, unsigned int len) {
  unsigned int block_nb;
  unsigned int new_len, rem_len, tmp_len;
  const unsigned char *shifted_message;
  tmp_len = SHA384_BLOCK_SIZE - ctx->len;
  rem_len = len < tmp_len ? len : tmp_len;
  memcpy(&ctx->block[ctx->len], message, rem_len);
  if (ctx->len + len < SHA384_BLOCK_SIZE) {
    ctx->len += len;
    return;
  }
  new_len = len - rem_len;
  block_nb = new_len / SHA384_BLOCK_SIZE;
  shifted_message = message + rem_len;
  sha512_transf(ctx, ctx->block, 1);
  sha512_transf(ctx, shifted_message, block_nb);
  rem_len = new_len % SHA384_BLOCK_SIZE;
  memcpy(ctx->block, &shifted_message[block_nb << 7], rem_len);
  ctx->len = rem_len;
  ctx->tot_len += (block_nb + 1) << 7;
}

void sha384_final(sha384_ctx *ctx, unsigned char *digest) {
  unsigned int block_nb;
  unsigned int pm_len;
  unsigned int len_b;
#ifndef UNROLL_LOOPS
  int i;
#endif
  block_nb = (1 + ((SHA384_BLOCK_SIZE - 17) < (ctx->len % SHA384_BLOCK_SIZE)));
  len_b = (ctx->tot_len + ctx->len) << 3;
  pm_len = block_nb << 7;
  memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
  ctx->block[ctx->len] = 0x80;
  UNPACK32(len_b, ctx->block + pm_len - 4);
  sha512_transf(ctx, ctx->block, block_nb);
#ifndef UNROLL_LOOPS
  for (i = 0 ; i < 6; i++) {
    UNPACK64(ctx->h[i], &digest[i << 3]);
  }
#else
  UNPACK64(ctx->h[0], &digest[ 0]);
  UNPACK64(ctx->h[1], &digest[ 8]);
  UNPACK64(ctx->h[2], &digest[16]);
  UNPACK64(ctx->h[3], &digest[24]);
  UNPACK64(ctx->h[4], &digest[32]);
  UNPACK64(ctx->h[5], &digest[40]);
#endif /* !UNROLL_LOOPS */
}

/* SHA-224 functions */

void sha224(const unsigned char *message, unsigned int len, unsigned char *digest) {
  sha224_ctx ctx;
  sha224_init(&ctx);
  sha224_update(&ctx, message, len);
  sha224_final(&ctx, digest);
}

void sha224_init(sha224_ctx *ctx) {
#ifndef UNROLL_LOOPS
  int i;
  for (i = 0; i < 8; i++) {
    ctx->h[i] = sha224_h0[i];
  }
#else
  ctx->h[0] = sha224_h0[0]; ctx->h[1] = sha224_h0[1];
  ctx->h[2] = sha224_h0[2]; ctx->h[3] = sha224_h0[3];
  ctx->h[4] = sha224_h0[4]; ctx->h[5] = sha224_h0[5];
  ctx->h[6] = sha224_h0[6]; ctx->h[7] = sha224_h0[7];
#endif /* !UNROLL_LOOPS */
  ctx->len = 0;
  ctx->tot_len = 0;
}

void sha224_update(sha224_ctx *ctx, const unsigned char *message, unsigned int len) {
  unsigned int block_nb;
  unsigned int new_len, rem_len, tmp_len;
  const unsigned char *shifted_message;
  tmp_len = SHA224_BLOCK_SIZE - ctx->len;
  rem_len = len < tmp_len ? len : tmp_len;
  memcpy(&ctx->block[ctx->len], message, rem_len);
  if (ctx->len + len < SHA224_BLOCK_SIZE) {
    ctx->len += len;
    return;
  }
  new_len = len - rem_len;
  block_nb = new_len / SHA224_BLOCK_SIZE;
  shifted_message = message + rem_len;
  sha256_transf(ctx, ctx->block, 1);
  sha256_transf(ctx, shifted_message, block_nb);
  rem_len = new_len % SHA224_BLOCK_SIZE;
  memcpy(ctx->block, &shifted_message[block_nb << 6], rem_len);
  ctx->len = rem_len;
  ctx->tot_len += (block_nb + 1) << 6;
}

void sha224_final(sha224_ctx *ctx, unsigned char *digest) {
  unsigned int block_nb;
  unsigned int pm_len;
  unsigned int len_b;
#ifndef UNROLL_LOOPS
  int i;
#endif
  block_nb = (1 + ((SHA224_BLOCK_SIZE - 9) < (ctx->len % SHA224_BLOCK_SIZE)));
  len_b = (ctx->tot_len + ctx->len) << 3;
  pm_len = block_nb << 6;
  memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
  ctx->block[ctx->len] = 0x80;
  UNPACK32(len_b, ctx->block + pm_len - 4);
  sha256_transf(ctx, ctx->block, block_nb);
#ifndef UNROLL_LOOPS
  for (i = 0 ; i < 7; i++) {
    UNPACK32(ctx->h[i], &digest[i << 2]);
  }
#else
  UNPACK32(ctx->h[0], &digest[ 0]);
  UNPACK32(ctx->h[1], &digest[ 4]);
  UNPACK32(ctx->h[2], &digest[ 8]);
  UNPACK32(ctx->h[3], &digest[12]);
  UNPACK32(ctx->h[4], &digest[16]);
  UNPACK32(ctx->h[5], &digest[20]);
  UNPACK32(ctx->h[6], &digest[24]);
#endif /* !UNROLL_LOOPS */
}

void hmac_sha224_init(hmac_sha224_ctx*, const unsigned char*, unsigned int);
void hmac_sha224_reinit(hmac_sha224_ctx*);
void hmac_sha224_update(hmac_sha224_ctx*, const unsigned char*, unsigned int);
void hmac_sha224_final(hmac_sha224_ctx*, unsigned char*, unsigned int);
void hmac_sha224(const unsigned char*, unsigned int, const unsigned char*, unsigned int, unsigned char*, unsigned);

void hmac_sha256_init(hmac_sha256_ctx*, const unsigned char*, unsigned int);
void hmac_sha256_reinit(hmac_sha256_ctx*);
void hmac_sha256_update(hmac_sha256_ctx*, const unsigned char*, unsigned int);
void hmac_sha256_final(hmac_sha256_ctx*, unsigned char*, unsigned int);
void hmac_sha256(const unsigned char*, unsigned int, const unsigned char*, unsigned int, unsigned char*, unsigned);

void hmac_sha384_init(hmac_sha384_ctx*, const unsigned char*, unsigned int);
void hmac_sha384_reinit(hmac_sha384_ctx*);
void hmac_sha384_update(hmac_sha384_ctx*, const unsigned char*, unsigned int);
void hmac_sha384_final(hmac_sha384_ctx*, unsigned char*, unsigned int);
void hmac_sha384(const unsigned char*, unsigned int, const unsigned char*, unsigned int, unsigned char*, unsigned);

void hmac_sha512_init(hmac_sha512_ctx*, const unsigned char*, unsigned int);
void hmac_sha512_reinit(hmac_sha512_ctx*);
void hmac_sha512_update(hmac_sha512_ctx*, const unsigned char*, unsigned int);
void hmac_sha512_final(hmac_sha512_ctx*, unsigned char*, unsigned int);
void hmac_sha512(const unsigned char*, unsigned int, const unsigned char*, unsigned int, unsigned char*, unsigned);

/* HMAC-SHA-224 functions */

void hmac_sha224_init(hmac_sha224_ctx *ctx, const unsigned char *key, unsigned int key_size) {
  unsigned int fill;
  unsigned int num;
  const unsigned char *key_used;
  unsigned char key_temp[SHA224_DIGEST_SIZE];
  int i;
  if (key_size == SHA224_BLOCK_SIZE) {
    key_used = key;
    num = SHA224_BLOCK_SIZE;
  } else {
    if (key_size > SHA224_BLOCK_SIZE) {
      num = SHA224_DIGEST_SIZE;
      sha224(key, key_size, key_temp);
      key_used = key_temp;
    } else { /* key_size > SHA224_BLOCK_SIZE */
      key_used = key;
      num = key_size;
    }
    fill = SHA224_BLOCK_SIZE - num;
    memset(ctx->block_ipad + num, 0x36, fill);
    memset(ctx->block_opad + num, 0x5c, fill);
  }
  for (i = 0; i < (int) num; i++) {
    ctx->block_ipad[i] = key_used[i] ^ 0x36;
    ctx->block_opad[i] = key_used[i] ^ 0x5c;
  }
  sha224_init(&ctx->ctx_inside);
  sha224_update(&ctx->ctx_inside, ctx->block_ipad, SHA224_BLOCK_SIZE);
  sha224_init(&ctx->ctx_outside);
  sha224_update(&ctx->ctx_outside, ctx->block_opad, SHA224_BLOCK_SIZE);
  /* for hmac_reinit */
  memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside, sizeof(sha224_ctx));
  memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside, sizeof(sha224_ctx));
}

void hmac_sha224_reinit(hmac_sha224_ctx *ctx) {
  memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit, sizeof(sha224_ctx));
  memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit, sizeof(sha224_ctx));
}

void hmac_sha224_update(hmac_sha224_ctx *ctx, const unsigned char *message, unsigned int message_len) {
  sha224_update(&ctx->ctx_inside, message, message_len);
}

void hmac_sha224_final(hmac_sha224_ctx *ctx, unsigned char *mac, unsigned int mac_size) {
  unsigned char digest_inside[SHA224_DIGEST_SIZE];
  unsigned char mac_temp[SHA224_DIGEST_SIZE];
  sha224_final(&ctx->ctx_inside, digest_inside);
  sha224_update(&ctx->ctx_outside, digest_inside, SHA224_DIGEST_SIZE);
  sha224_final(&ctx->ctx_outside, mac_temp);
  memcpy(mac, mac_temp, mac_size);
}

void hmac_sha224(const unsigned char *key, unsigned int key_size, const unsigned char *message, unsigned int message_len, unsigned char *mac, unsigned mac_size) {
  hmac_sha224_ctx ctx;
  hmac_sha224_init(&ctx, key, key_size);
  hmac_sha224_update(&ctx, message, message_len);
  hmac_sha224_final(&ctx, mac, mac_size);
}

/* HMAC-SHA-256 functions */

void hmac_sha256_init(hmac_sha256_ctx *ctx, const unsigned char *key, unsigned int key_size) {
  unsigned int fill;
  unsigned int num;
  const unsigned char *key_used;
  unsigned char key_temp[SHA256_DIGEST_SIZE];
  int i;
  if (key_size == SHA256_BLOCK_SIZE) {
    key_used = key;
    num = SHA256_BLOCK_SIZE;
  } else {
    if (key_size > SHA256_BLOCK_SIZE) {
      num = SHA256_DIGEST_SIZE;
      sha256(key, key_size, key_temp);
      key_used = key_temp;
    } else { /* key_size > SHA256_BLOCK_SIZE */
      key_used = key;
      num = key_size;
    }
    fill = SHA256_BLOCK_SIZE - num;
    memset(ctx->block_ipad + num, 0x36, fill);
    memset(ctx->block_opad + num, 0x5c, fill);
  }
  for (i = 0; i < (int) num; i++) {
    ctx->block_ipad[i] = key_used[i] ^ 0x36;
    ctx->block_opad[i] = key_used[i] ^ 0x5c;
  }
  sha256_init(&ctx->ctx_inside);
  sha256_update(&ctx->ctx_inside, ctx->block_ipad, SHA256_BLOCK_SIZE);
  sha256_init(&ctx->ctx_outside);
  sha256_update(&ctx->ctx_outside, ctx->block_opad, SHA256_BLOCK_SIZE);
  /* for hmac_reinit */
  memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside, sizeof(sha256_ctx));
  memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside, sizeof(sha256_ctx));
}

void hmac_sha256_reinit(hmac_sha256_ctx *ctx) {
  memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit, sizeof(sha256_ctx));
  memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit, sizeof(sha256_ctx));
}

void hmac_sha256_update(hmac_sha256_ctx *ctx, const unsigned char *message, unsigned int message_len) {
  sha256_update(&ctx->ctx_inside, message, message_len);
}

void hmac_sha256_final(hmac_sha256_ctx *ctx, unsigned char *mac, unsigned int mac_size) {
  unsigned char digest_inside[SHA256_DIGEST_SIZE];
  unsigned char mac_temp[SHA256_DIGEST_SIZE];
  sha256_final(&ctx->ctx_inside, digest_inside);
  sha256_update(&ctx->ctx_outside, digest_inside, SHA256_DIGEST_SIZE);
  sha256_final(&ctx->ctx_outside, mac_temp);
  memcpy(mac, mac_temp, mac_size);
}

void hmac_sha256(const unsigned char *key, unsigned int key_size, const unsigned char *message, unsigned int message_len, unsigned char *mac, unsigned mac_size) {
  hmac_sha256_ctx ctx;
  hmac_sha256_init(&ctx, key, key_size);
  hmac_sha256_update(&ctx, message, message_len);
  hmac_sha256_final(&ctx, mac, mac_size);
}

/* HMAC-SHA-384 functions */

void hmac_sha384_init(hmac_sha384_ctx *ctx, const unsigned char *key, unsigned int key_size) {
  unsigned int fill;
  unsigned int num;
  const unsigned char *key_used;
  unsigned char key_temp[SHA384_DIGEST_SIZE];
  int i;
  if (key_size == SHA384_BLOCK_SIZE) {
    key_used = key;
    num = SHA384_BLOCK_SIZE;
  } else {
    if (key_size > SHA384_BLOCK_SIZE) {
      num = SHA384_DIGEST_SIZE;
      sha384(key, key_size, key_temp);
      key_used = key_temp;
    } else { /* key_size > SHA384_BLOCK_SIZE */
      key_used = key;
      num = key_size;
    }
    fill = SHA384_BLOCK_SIZE - num;
    memset(ctx->block_ipad + num, 0x36, fill);
    memset(ctx->block_opad + num, 0x5c, fill);
  }
  for (i = 0; i < (int) num; i++) {
    ctx->block_ipad[i] = key_used[i] ^ 0x36;
    ctx->block_opad[i] = key_used[i] ^ 0x5c;
  }
  sha384_init(&ctx->ctx_inside);
  sha384_update(&ctx->ctx_inside, ctx->block_ipad, SHA384_BLOCK_SIZE);
  sha384_init(&ctx->ctx_outside);
  sha384_update(&ctx->ctx_outside, ctx->block_opad, SHA384_BLOCK_SIZE);
  /* for hmac_reinit */
  memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside, sizeof(sha384_ctx));
  memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside, sizeof(sha384_ctx));
}

void hmac_sha384_reinit(hmac_sha384_ctx *ctx) {
  memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit, sizeof(sha384_ctx));
  memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit, sizeof(sha384_ctx));
}

void hmac_sha384_update(hmac_sha384_ctx *ctx, const unsigned char *message, unsigned int message_len) {
  sha384_update(&ctx->ctx_inside, message, message_len);
}

void hmac_sha384_final(hmac_sha384_ctx *ctx, unsigned char *mac, unsigned int mac_size) {
  unsigned char digest_inside[SHA384_DIGEST_SIZE];
  unsigned char mac_temp[SHA384_DIGEST_SIZE];
  sha384_final(&ctx->ctx_inside, digest_inside);
  sha384_update(&ctx->ctx_outside, digest_inside, SHA384_DIGEST_SIZE);
  sha384_final(&ctx->ctx_outside, mac_temp);
  memcpy(mac, mac_temp, mac_size);
}

void hmac_sha384(const unsigned char *key, unsigned int key_size, const unsigned char *message, unsigned int message_len, unsigned char *mac, unsigned mac_size) {
  hmac_sha384_ctx ctx;
  hmac_sha384_init(&ctx, key, key_size);
  hmac_sha384_update(&ctx, message, message_len);
  hmac_sha384_final(&ctx, mac, mac_size);
}

/* HMAC-SHA-512 functions */

void hmac_sha512_init(hmac_sha512_ctx *ctx, const unsigned char *key, unsigned int key_size) {
  unsigned int fill;
  unsigned int num;
  const unsigned char *key_used;
  unsigned char key_temp[SHA512_DIGEST_SIZE];
  int i;
  if (key_size == SHA512_BLOCK_SIZE) {
    key_used = key;
    num = SHA512_BLOCK_SIZE;
  } else {
    if (key_size > SHA512_BLOCK_SIZE) {
      num = SHA512_DIGEST_SIZE;
      sha512(key, key_size, key_temp);
      key_used = key_temp;
    } else { /* key_size > SHA512_BLOCK_SIZE */
      key_used = key;
      num = key_size;
    }
    fill = SHA512_BLOCK_SIZE - num;
    memset(ctx->block_ipad + num, 0x36, fill);
    memset(ctx->block_opad + num, 0x5c, fill);
  }
  for (i = 0; i < (int) num; i++) {
    ctx->block_ipad[i] = key_used[i] ^ 0x36;
    ctx->block_opad[i] = key_used[i] ^ 0x5c;
  }
  sha512_init(&ctx->ctx_inside);
  sha512_update(&ctx->ctx_inside, ctx->block_ipad, SHA512_BLOCK_SIZE);
  sha512_init(&ctx->ctx_outside);
  sha512_update(&ctx->ctx_outside, ctx->block_opad, SHA512_BLOCK_SIZE);
  /* for hmac_reinit */
  memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside, sizeof(sha512_ctx));
  memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside, sizeof(sha512_ctx));
}

void hmac_sha512_reinit(hmac_sha512_ctx *ctx) {
  memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit, sizeof(sha512_ctx));
  memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit, sizeof(sha512_ctx));
}

void hmac_sha512_update(hmac_sha512_ctx *ctx, const unsigned char *message, unsigned int message_len) {
  sha512_update(&ctx->ctx_inside, message, message_len);
}

void hmac_sha512_final(hmac_sha512_ctx *ctx, unsigned char *mac, unsigned int mac_size) {
  unsigned char digest_inside[SHA512_DIGEST_SIZE];
  unsigned char mac_temp[SHA512_DIGEST_SIZE];
  sha512_final(&ctx->ctx_inside, digest_inside);
  sha512_update(&ctx->ctx_outside, digest_inside, SHA512_DIGEST_SIZE);
  sha512_final(&ctx->ctx_outside, mac_temp);
  memcpy(mac, mac_temp, mac_size);
}

void hmac_sha512(const unsigned char *key, unsigned int key_size, const unsigned char *message, unsigned int message_len, unsigned char *mac, unsigned mac_size) {
  hmac_sha512_ctx ctx;
  hmac_sha512_init(&ctx, key, key_size);
  hmac_sha512_update(&ctx, message, message_len);
  hmac_sha512_final(&ctx, mac, mac_size);
}