lib/sha512.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * FIPS-180-2 compliant SHA-512 and SHA-384 implementation
   4  *
   5  * SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com>
   6  *
   7  * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
   8  * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
   9  * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
  10  * Copyright (c) 2020 Reuben Dowle <reuben.dowle@4rf.com>
  11  */
  12
  13 #ifndef USE_HOSTCC
  14 #include <common.h>
  15 #include <linux/string.h>
  16 #else
  17 #include <string.h>
  18 #endif /* USE_HOSTCC */
  19 #include <watchdog.h>
  20 #include <u-boot/sha512.h>
  21
  22 const uint8_t sha384_der_prefix[SHA384_DER_LEN] = {
  23         0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
  24         0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05,
  25         0x00, 0x04, 0x30
  26 };
  27
  28 const uint8_t sha512_der_prefix[SHA512_DER_LEN] = {
  29         0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
  30         0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05,
  31         0x00, 0x04, 0x40
  32 };
  33
  34 #define SHA384_H0       0xcbbb9d5dc1059ed8ULL
  35 #define SHA384_H1       0x629a292a367cd507ULL
  36 #define SHA384_H2       0x9159015a3070dd17ULL
  37 #define SHA384_H3       0x152fecd8f70e5939ULL
  38 #define SHA384_H4       0x67332667ffc00b31ULL
  39 #define SHA384_H5       0x8eb44a8768581511ULL
  40 #define SHA384_H6       0xdb0c2e0d64f98fa7ULL
  41 #define SHA384_H7       0x47b5481dbefa4fa4ULL
  42
  43 #define SHA512_H0       0x6a09e667f3bcc908ULL
  44 #define SHA512_H1       0xbb67ae8584caa73bULL
  45 #define SHA512_H2       0x3c6ef372fe94f82bULL
  46 #define SHA512_H3       0xa54ff53a5f1d36f1ULL
  47 #define SHA512_H4       0x510e527fade682d1ULL
  48 #define SHA512_H5       0x9b05688c2b3e6c1fULL
  49 #define SHA512_H6       0x1f83d9abfb41bd6bULL
  50 #define SHA512_H7       0x5be0cd19137e2179ULL
  51
  52 static inline uint64_t Ch(uint64_t x, uint64_t y, uint64_t z)
  53 {
  54         return z ^ (x & (y ^ z));
  55 }
  56
  57 static inline uint64_t Maj(uint64_t x, uint64_t y, uint64_t z)
  58 {
  59         return (x & y) | (z & (x | y));
  60 }
  61
  62 static const uint64_t sha512_K[80] = {
  63         0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
  64         0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
  65         0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
  66         0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
  67         0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
  68         0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
  69         0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
  70         0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
  71         0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
  72         0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
  73         0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
  74         0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
  75         0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
  76         0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
  77         0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
  78         0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
  79         0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
  80         0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
  81         0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
  82         0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
  83         0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
  84         0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
  85         0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
  86         0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
  87         0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
  88         0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
  89         0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
  90 };
  91
  92 static inline uint64_t ror64(uint64_t word, unsigned int shift)
  93 {
  94         return (word >> (shift & 63)) | (word << ((-shift) & 63));
  95 }
  96
  97 #define e0(x)       (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
  98 #define e1(x)       (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
  99 #define s0(x)       (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
 100 #define s1(x)       (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))
 101
 102 /*
 103  * 64-bit integer manipulation macros (big endian)
 104  */
 105 #ifndef GET_UINT64_BE
 106 #define GET_UINT64_BE(n,b,i) {                          \
 107         (n) = ( (unsigned long long) (b)[(i)    ] << 56 )       \
 108             | ( (unsigned long long) (b)[(i) + 1] << 48 )       \
 109             | ( (unsigned long long) (b)[(i) + 2] << 40 )       \
 110             | ( (unsigned long long) (b)[(i) + 3] << 32 )       \
 111             | ( (unsigned long long) (b)[(i) + 4] << 24 )       \
 112             | ( (unsigned long long) (b)[(i) + 5] << 16 )       \
 113             | ( (unsigned long long) (b)[(i) + 6] <<  8 )       \
 114             | ( (unsigned long long) (b)[(i) + 7]       );      \
 115 }
 116 #endif
 117 #ifndef PUT_UINT64_BE
 118 #define PUT_UINT64_BE(n,b,i) {                          \
 119         (b)[(i)    ] = (unsigned char) ( (n) >> 56 );   \
 120         (b)[(i) + 1] = (unsigned char) ( (n) >> 48 );   \
 121         (b)[(i) + 2] = (unsigned char) ( (n) >> 40 );   \
 122         (b)[(i) + 3] = (unsigned char) ( (n) >> 32 );   \
 123         (b)[(i) + 4] = (unsigned char) ( (n) >> 24 );   \
 124         (b)[(i) + 5] = (unsigned char) ( (n) >> 16 );   \
 125         (b)[(i) + 6] = (unsigned char) ( (n) >>  8 );   \
 126         (b)[(i) + 7] = (unsigned char) ( (n)       );   \
 127 }
 128 #endif
 129
 130 static inline void LOAD_OP(int I, uint64_t *W, const uint8_t *input)
 131 {
 132         GET_UINT64_BE(W[I], input, I*8);
 133 }
 134
 135 static inline void BLEND_OP(int I, uint64_t *W)
 136 {
 137         W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
 138 }
 139
 140 static void
 141 sha512_transform(uint64_t *state, const uint8_t *input)
 142 {
 143         uint64_t a, b, c, d, e, f, g, h, t1, t2;
 144
 145         int i;
 146         uint64_t W[16];
 147
 148         /* load the state into our registers */
 149         a=state[0];   b=state[1];   c=state[2];   d=state[3];
 150         e=state[4];   f=state[5];   g=state[6];   h=state[7];
 151
 152         /* now iterate */
 153         for (i=0; i<80; i+=8) {
 154                 if (!(i & 8)) {
 155                         int j;
 156
 157                         if (i < 16) {
 158                                 /* load the input */
 159                                 for (j = 0; j < 16; j++)
 160                                         LOAD_OP(i + j, W, input);
 161                         } else {
 162                                 for (j = 0; j < 16; j++) {
 163                                         BLEND_OP(i + j, W);
 164                                 }
 165                         }
 166                 }
 167
 168                 t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[(i & 15)];
 169                 t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
 170                 t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
 171                 t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
 172                 t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
 173                 t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
 174                 t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
 175                 t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
 176                 t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
 177                 t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
 178                 t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
 179                 t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
 180                 t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
 181                 t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
 182                 t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
 183                 t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;
 184         }
 185
 186         state[0] += a; state[1] += b; state[2] += c; state[3] += d;
 187         state[4] += e; state[5] += f; state[6] += g; state[7] += h;
 188
 189         /* erase our data */
 190         a = b = c = d = e = f = g = h = t1 = t2 = 0;
 191 }
 192
 193 static void sha512_block_fn(sha512_context *sst, const uint8_t *src,
 194                                     int blocks)
 195 {
 196         while (blocks--) {
 197                 sha512_transform(sst->state, src);
 198                 src += SHA512_BLOCK_SIZE;
 199         }
 200 }
 201
 202 static void sha512_base_do_update(sha512_context *sctx,
 203                                         const uint8_t *data,
 204                                         unsigned int len)
 205 {
 206         unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
 207
 208         sctx->count[0] += len;
 209         if (sctx->count[0] < len)
 210                 sctx->count[1]++;
 211
 212         if (unlikely((partial + len) >= SHA512_BLOCK_SIZE)) {
 213                 int blocks;
 214
 215                 if (partial) {
 216                         int p = SHA512_BLOCK_SIZE - partial;
 217
 218                         memcpy(sctx->buf + partial, data, p);
 219                         data += p;
 220                         len -= p;
 221
 222                         sha512_block_fn(sctx, sctx->buf, 1);
 223                 }
 224
 225                 blocks = len / SHA512_BLOCK_SIZE;
 226                 len %= SHA512_BLOCK_SIZE;
 227
 228                 if (blocks) {
 229                         sha512_block_fn(sctx, data, blocks);
 230                         data += blocks * SHA512_BLOCK_SIZE;
 231                 }
 232                 partial = 0;
 233         }
 234         if (len)
 235                 memcpy(sctx->buf + partial, data, len);
 236 }
 237
 238 static void sha512_base_do_finalize(sha512_context *sctx)
 239 {
 240         const int bit_offset = SHA512_BLOCK_SIZE - sizeof(uint64_t[2]);
 241         uint64_t *bits = (uint64_t *)(sctx->buf + bit_offset);
 242         unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
 243
 244         sctx->buf[partial++] = 0x80;
 245         if (partial > bit_offset) {
 246                 memset(sctx->buf + partial, 0x0, SHA512_BLOCK_SIZE - partial);
 247                 partial = 0;
 248
 249                 sha512_block_fn(sctx, sctx->buf, 1);
 250         }
 251
 252         memset(sctx->buf + partial, 0x0, bit_offset - partial);
 253         bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
 254         bits[1] = cpu_to_be64(sctx->count[0] << 3);
 255         sha512_block_fn(sctx, sctx->buf, 1);
 256 }
 257
 258 #if defined(CONFIG_SHA384)
 259 void sha384_starts(sha512_context * ctx)
 260 {
 261         ctx->state[0] = SHA384_H0;
 262         ctx->state[1] = SHA384_H1;
 263         ctx->state[2] = SHA384_H2;
 264         ctx->state[3] = SHA384_H3;
 265         ctx->state[4] = SHA384_H4;
 266         ctx->state[5] = SHA384_H5;
 267         ctx->state[6] = SHA384_H6;
 268         ctx->state[7] = SHA384_H7;
 269         ctx->count[0] = ctx->count[1] = 0;
 270 }
 271
 272 void sha384_update(sha512_context *ctx, const uint8_t *input, uint32_t length)
 273 {
 274         sha512_base_do_update(ctx, input, length);
 275 }
 276
 277 void sha384_finish(sha512_context * ctx, uint8_t digest[SHA384_SUM_LEN])
 278 {
 279         int i;
 280
 281         sha512_base_do_finalize(ctx);
 282         for(i=0; i<SHA384_SUM_LEN / sizeof(uint64_t); i++)
 283                 PUT_UINT64_BE(ctx->state[i], digest, i * 8);
 284 }
 285
 286 /*
 287  * Output = SHA-512( input buffer ). Trigger the watchdog every 'chunk_sz'
 288  * bytes of input processed.
 289  */
 290 void sha384_csum_wd(const unsigned char *input, unsigned int ilen,
 291                 unsigned char *output, unsigned int chunk_sz)
 292 {
 293         sha512_context ctx;
 294 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 295         const unsigned char *end;
 296         unsigned char *curr;
 297         int chunk;
 298 #endif
 299
 300         sha384_starts(&ctx);
 301
 302 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 303         curr = (unsigned char *)input;
 304         end = input + ilen;
 305         while (curr < end) {
 306                 chunk = end - curr;
 307                 if (chunk > chunk_sz)
 308                         chunk = chunk_sz;
 309                 sha384_update(&ctx, curr, chunk);
 310                 curr += chunk;
 311                 WATCHDOG_RESET();
 312         }
 313 #else
 314         sha384_update(&ctx, input, ilen);
 315 #endif
 316
 317         sha384_finish(&ctx, output);
 318 }
 319
 320 #endif
 321
 322 #if defined(CONFIG_SHA512)
 323 void sha512_starts(sha512_context * ctx)
 324 {
 325         ctx->state[0] = SHA512_H0;
 326         ctx->state[1] = SHA512_H1;
 327         ctx->state[2] = SHA512_H2;
 328         ctx->state[3] = SHA512_H3;
 329         ctx->state[4] = SHA512_H4;
 330         ctx->state[5] = SHA512_H5;
 331         ctx->state[6] = SHA512_H6;
 332         ctx->state[7] = SHA512_H7;
 333         ctx->count[0] = ctx->count[1] = 0;
 334 }
 335
 336 void sha512_update(sha512_context *ctx, const uint8_t *input, uint32_t length)
 337 {
 338         sha512_base_do_update(ctx, input, length);
 339 }
 340
 341 void sha512_finish(sha512_context * ctx, uint8_t digest[SHA512_SUM_LEN])
 342 {
 343         int i;
 344
 345         sha512_base_do_finalize(ctx);
 346         for(i=0; i<SHA512_SUM_LEN / sizeof(uint64_t); i++)
 347                 PUT_UINT64_BE(ctx->state[i], digest, i * 8);
 348 }
 349
 350 /*
 351  * Output = SHA-512( input buffer ). Trigger the watchdog every 'chunk_sz'
 352  * bytes of input processed.
 353  */
 354 void sha512_csum_wd(const unsigned char *input, unsigned int ilen,
 355                 unsigned char *output, unsigned int chunk_sz)
 356 {
 357         sha512_context ctx;
 358 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 359         const unsigned char *end;
 360         unsigned char *curr;
 361         int chunk;
 362 #endif
 363
 364         sha512_starts(&ctx);
 365
 366 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 367         curr = (unsigned char *)input;
 368         end = input + ilen;
 369         while (curr < end) {
 370                 chunk = end - curr;
 371                 if (chunk > chunk_sz)
 372                         chunk = chunk_sz;
 373                 sha512_update(&ctx, curr, chunk);
 374                 curr += chunk;
 375                 WATCHDOG_RESET();
 376         }
 377 #else
 378         sha512_update(&ctx, input, ilen);
 379 #endif
 380
 381         sha512_finish(&ctx, output);
 382 }
 383 #endif