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