+++ /dev/null
-/*
- * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-/*
- * Derived from the BLAKE2 reference implementation written by Samuel Neves.
- * Copyright 2012, Samuel Neves <sneves@dei.uc.pt>
- * More information about the BLAKE2 hash function and its implementations
- * can be found at https://blake2.net.
- */
-
-#include <assert.h>
-#include <string.h>
-#include <openssl/crypto.h>
-
-#include "blake2_locl.h"
-#include "blake2_impl.h"
-
-static const uint64_t blake2b_IV[8] =
-{
- 0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
- 0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
- 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
- 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
-};
-
-static const uint8_t blake2b_sigma[12][16] =
-{
- { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
- { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 } ,
- { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 } ,
- { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 } ,
- { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 } ,
- { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 } ,
- { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 } ,
- { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 } ,
- { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 } ,
- { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0 } ,
- { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
- { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
-};
-
-/* Set that it's the last block we'll compress */
-static ossl_inline void blake2b_set_lastblock(BLAKE2B_CTX *S)
-{
- S->f[0] = -1;
-}
-
-/* Initialize the hashing state. */
-static ossl_inline void blake2b_init0(BLAKE2B_CTX *S)
-{
- int i;
-
- memset(S, 0, sizeof(BLAKE2B_CTX));
- for (i = 0; i < 8; ++i) {
- S->h[i] = blake2b_IV[i];
- }
-}
-
-/* init xors IV with input parameter block and sets the output length */
-static void blake2b_init_param(BLAKE2B_CTX *S, const BLAKE2B_PARAM *P)
-{
- size_t i;
- const uint8_t *p = (const uint8_t *)(P);
-
- blake2b_init0(S);
- S->outlen = P->digest_length;
-
- /* The param struct is carefully hand packed, and should be 64 bytes on
- * every platform. */
- assert(sizeof(BLAKE2B_PARAM) == 64);
- /* IV XOR ParamBlock */
- for (i = 0; i < 8; ++i) {
- S->h[i] ^= load64(p + sizeof(S->h[i]) * i);
- }
-}
-
-/* Initialize the parameter block with default values */
-void blake2b_param_init(BLAKE2B_PARAM *P)
-{
- P->digest_length = BLAKE2B_DIGEST_LENGTH;
- P->key_length = 0;
- P->fanout = 1;
- P->depth = 1;
- store32(P->leaf_length, 0);
- store64(P->node_offset, 0);
- P->node_depth = 0;
- P->inner_length = 0;
- memset(P->reserved, 0, sizeof(P->reserved));
- memset(P->salt, 0, sizeof(P->salt));
- memset(P->personal, 0, sizeof(P->personal));
-}
-
-void blake2b_param_set_digest_length(BLAKE2B_PARAM *P, uint8_t outlen)
-{
- P->digest_length = outlen;
-}
-
-void blake2b_param_set_key_length(BLAKE2B_PARAM *P, uint8_t keylen)
-{
- P->key_length = keylen;
-}
-
-void blake2b_param_set_personal(BLAKE2B_PARAM *P, const uint8_t *personal, size_t len)
-{
- memcpy(P->personal, personal, len);
- memset(P->personal + len, 0, BLAKE2B_PERSONALBYTES - len);
-}
-
-void blake2b_param_set_salt(BLAKE2B_PARAM *P, const uint8_t *salt, size_t len)
-{
- memcpy(P->salt, salt, len);
- memset(P->salt + len, 0, BLAKE2B_SALTBYTES - len);
-}
-
-/*
- * Initialize the hashing context with the given parameter block.
- * Always returns 1.
- */
-int BLAKE2b_Init(BLAKE2B_CTX *c, const BLAKE2B_PARAM *P)
-{
- blake2b_init_param(c, P);
- return 1;
-}
-
-/*
- * Initialize the hashing context with the given parameter block and key.
- * Always returns 1.
- */
-int BLAKE2b_Init_key(BLAKE2B_CTX *c, const BLAKE2B_PARAM *P, const void *key)
-{
- blake2b_init_param(c, P);
-
- /* Pad the key to form first data block */
- {
- uint8_t block[BLAKE2B_BLOCKBYTES] = {0};
-
- memcpy(block, key, P->key_length);
- BLAKE2b_Update(c, block, BLAKE2B_BLOCKBYTES);
- OPENSSL_cleanse(block, BLAKE2B_BLOCKBYTES);
- }
-
- return 1;
-}
-
-/* Permute the state while xoring in the block of data. */
-static void blake2b_compress(BLAKE2B_CTX *S,
- const uint8_t *blocks,
- size_t len)
-{
- uint64_t m[16];
- uint64_t v[16];
- int i;
- size_t increment;
-
- /*
- * There are two distinct usage vectors for this function:
- *
- * a) BLAKE2b_Update uses it to process complete blocks,
- * possibly more than one at a time;
- *
- * b) BLAK2b_Final uses it to process last block, always
- * single but possibly incomplete, in which case caller
- * pads input with zeros.
- */
- assert(len < BLAKE2B_BLOCKBYTES || len % BLAKE2B_BLOCKBYTES == 0);
-
- /*
- * Since last block is always processed with separate call,
- * |len| not being multiple of complete blocks can be observed
- * only with |len| being less than BLAKE2B_BLOCKBYTES ("less"
- * including even zero), which is why following assignment doesn't
- * have to reside inside the main loop below.
- */
- increment = len < BLAKE2B_BLOCKBYTES ? len : BLAKE2B_BLOCKBYTES;
-
- for (i = 0; i < 8; ++i) {
- v[i] = S->h[i];
- }
-
- do {
- for (i = 0; i < 16; ++i) {
- m[i] = load64(blocks + i * sizeof(m[i]));
- }
-
- /* blake2b_increment_counter */
- S->t[0] += increment;
- S->t[1] += (S->t[0] < increment);
-
- v[8] = blake2b_IV[0];
- v[9] = blake2b_IV[1];
- v[10] = blake2b_IV[2];
- v[11] = blake2b_IV[3];
- v[12] = S->t[0] ^ blake2b_IV[4];
- v[13] = S->t[1] ^ blake2b_IV[5];
- v[14] = S->f[0] ^ blake2b_IV[6];
- v[15] = S->f[1] ^ blake2b_IV[7];
-#define G(r,i,a,b,c,d) \
- do { \
- a = a + b + m[blake2b_sigma[r][2*i+0]]; \
- d = rotr64(d ^ a, 32); \
- c = c + d; \
- b = rotr64(b ^ c, 24); \
- a = a + b + m[blake2b_sigma[r][2*i+1]]; \
- d = rotr64(d ^ a, 16); \
- c = c + d; \
- b = rotr64(b ^ c, 63); \
- } while (0)
-#define ROUND(r) \
- do { \
- G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
- G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
- G(r,2,v[ 2],v[ 6],v[10],v[14]); \
- G(r,3,v[ 3],v[ 7],v[11],v[15]); \
- G(r,4,v[ 0],v[ 5],v[10],v[15]); \
- G(r,5,v[ 1],v[ 6],v[11],v[12]); \
- G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
- G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
- } while (0)
-#if defined(OPENSSL_SMALL_FOOTPRINT)
- /* 3x size reduction on x86_64, almost 7x on ARMv8, 9x on ARMv4 */
- for (i = 0; i < 12; i++) {
- ROUND(i);
- }
-#else
- ROUND(0);
- ROUND(1);
- ROUND(2);
- ROUND(3);
- ROUND(4);
- ROUND(5);
- ROUND(6);
- ROUND(7);
- ROUND(8);
- ROUND(9);
- ROUND(10);
- ROUND(11);
-#endif
-
- for (i = 0; i < 8; ++i) {
- S->h[i] = v[i] ^= v[i + 8] ^ S->h[i];
- }
-#undef G
-#undef ROUND
- blocks += increment;
- len -= increment;
- } while (len);
-}
-
-/* Absorb the input data into the hash state. Always returns 1. */
-int BLAKE2b_Update(BLAKE2B_CTX *c, const void *data, size_t datalen)
-{
- const uint8_t *in = data;
- size_t fill;
-
- /*
- * Intuitively one would expect intermediate buffer, c->buf, to
- * store incomplete blocks. But in this case we are interested to
- * temporarily stash even complete blocks, because last one in the
- * stream has to be treated in special way, and at this point we
- * don't know if last block in *this* call is last one "ever". This
- * is the reason for why |datalen| is compared as >, and not >=.
- */
- fill = sizeof(c->buf) - c->buflen;
- if (datalen > fill) {
- if (c->buflen) {
- memcpy(c->buf + c->buflen, in, fill); /* Fill buffer */
- blake2b_compress(c, c->buf, BLAKE2B_BLOCKBYTES);
- c->buflen = 0;
- in += fill;
- datalen -= fill;
- }
- if (datalen > BLAKE2B_BLOCKBYTES) {
- size_t stashlen = datalen % BLAKE2B_BLOCKBYTES;
- /*
- * If |datalen| is a multiple of the blocksize, stash
- * last complete block, it can be final one...
- */
- stashlen = stashlen ? stashlen : BLAKE2B_BLOCKBYTES;
- datalen -= stashlen;
- blake2b_compress(c, in, datalen);
- in += datalen;
- datalen = stashlen;
- }
- }
-
- assert(datalen <= BLAKE2B_BLOCKBYTES);
-
- memcpy(c->buf + c->buflen, in, datalen);
- c->buflen += datalen; /* Be lazy, do not compress */
-
- return 1;
-}
-
-/*
- * Calculate the final hash and save it in md.
- * Always returns 1.
- */
-int BLAKE2b_Final(unsigned char *md, BLAKE2B_CTX *c)
-{
- uint8_t outbuffer[BLAKE2B_OUTBYTES] = {0};
- uint8_t *target = outbuffer;
- int iter = (c->outlen + 7) / 8;
- int i;
-
- /* Avoid writing to the temporary buffer if possible */
- if ((c->outlen % sizeof(c->h[0])) == 0)
- target = md;
-
- blake2b_set_lastblock(c);
- /* Padding */
- memset(c->buf + c->buflen, 0, sizeof(c->buf) - c->buflen);
- blake2b_compress(c, c->buf, c->buflen);
-
- /* Output full hash to buffer */
- for (i = 0; i < iter; ++i)
- store64(target + sizeof(c->h[i]) * i, c->h[i]);
-
- if (target != md)
- memcpy(md, target, c->outlen);
-
- OPENSSL_cleanse(c, sizeof(BLAKE2B_CTX));
- return 1;
-}
projects / oweals / openssl.git / blobdiff