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head/contrib/bearssl/src/hash/sha2big.c

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/*
* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "inner.h"
#define CH(X, Y, Z) ((((Y) ^ (Z)) & (X)) ^ (Z))
#define MAJ(X, Y, Z) (((Y) & (Z)) | (((Y) | (Z)) & (X)))
#define ROTR(x, n) (((uint64_t)(x) << (64 - (n))) | ((uint64_t)(x) >> (n)))
#define BSG5_0(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
#define BSG5_1(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
#define SSG5_0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ (uint64_t)((x) >> 7))
#define SSG5_1(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ (uint64_t)((x) >> 6))
static const uint64_t IV384[8] = {
0xCBBB9D5DC1059ED8, 0x629A292A367CD507,
0x9159015A3070DD17, 0x152FECD8F70E5939,
0x67332667FFC00B31, 0x8EB44A8768581511,
0xDB0C2E0D64F98FA7, 0x47B5481DBEFA4FA4
};
static const uint64_t IV512[8] = {
0x6A09E667F3BCC908, 0xBB67AE8584CAA73B,
0x3C6EF372FE94F82B, 0xA54FF53A5F1D36F1,
0x510E527FADE682D1, 0x9B05688C2B3E6C1F,
0x1F83D9ABFB41BD6B, 0x5BE0CD19137E2179
};
static const uint64_t K[80] = {
0x428A2F98D728AE22, 0x7137449123EF65CD,
0xB5C0FBCFEC4D3B2F, 0xE9B5DBA58189DBBC,
0x3956C25BF348B538, 0x59F111F1B605D019,
0x923F82A4AF194F9B, 0xAB1C5ED5DA6D8118,
0xD807AA98A3030242, 0x12835B0145706FBE,
0x243185BE4EE4B28C, 0x550C7DC3D5FFB4E2,
0x72BE5D74F27B896F, 0x80DEB1FE3B1696B1,
0x9BDC06A725C71235, 0xC19BF174CF692694,
0xE49B69C19EF14AD2, 0xEFBE4786384F25E3,
0x0FC19DC68B8CD5B5, 0x240CA1CC77AC9C65,
0x2DE92C6F592B0275, 0x4A7484AA6EA6E483,
0x5CB0A9DCBD41FBD4, 0x76F988DA831153B5,
0x983E5152EE66DFAB, 0xA831C66D2DB43210,
0xB00327C898FB213F, 0xBF597FC7BEEF0EE4,
0xC6E00BF33DA88FC2, 0xD5A79147930AA725,
0x06CA6351E003826F, 0x142929670A0E6E70,
0x27B70A8546D22FFC, 0x2E1B21385C26C926,
0x4D2C6DFC5AC42AED, 0x53380D139D95B3DF,
0x650A73548BAF63DE, 0x766A0ABB3C77B2A8,
0x81C2C92E47EDAEE6, 0x92722C851482353B,
0xA2BFE8A14CF10364, 0xA81A664BBC423001,
0xC24B8B70D0F89791, 0xC76C51A30654BE30,
0xD192E819D6EF5218, 0xD69906245565A910,
0xF40E35855771202A, 0x106AA07032BBD1B8,
0x19A4C116B8D2D0C8, 0x1E376C085141AB53,
0x2748774CDF8EEB99, 0x34B0BCB5E19B48A8,
0x391C0CB3C5C95A63, 0x4ED8AA4AE3418ACB,
0x5B9CCA4F7763E373, 0x682E6FF3D6B2B8A3,
0x748F82EE5DEFB2FC, 0x78A5636F43172F60,
0x84C87814A1F0AB72, 0x8CC702081A6439EC,
0x90BEFFFA23631E28, 0xA4506CEBDE82BDE9,
0xBEF9A3F7B2C67915, 0xC67178F2E372532B,
0xCA273ECEEA26619C, 0xD186B8C721C0C207,
0xEADA7DD6CDE0EB1E, 0xF57D4F7FEE6ED178,
0x06F067AA72176FBA, 0x0A637DC5A2C898A6,
0x113F9804BEF90DAE, 0x1B710B35131C471B,
0x28DB77F523047D84, 0x32CAAB7B40C72493,
0x3C9EBE0A15C9BEBC, 0x431D67C49C100D4C,
0x4CC5D4BECB3E42B6, 0x597F299CFC657E2A,
0x5FCB6FAB3AD6FAEC, 0x6C44198C4A475817
};
static void
sha2big_round(const unsigned char *buf, uint64_t *val)
{
#define SHA2BIG_STEP(A, B, C, D, E, F, G, H, j) do { \
uint64_t T1, T2; \
T1 = H + BSG5_1(E) + CH(E, F, G) + K[j] + w[j]; \
T2 = BSG5_0(A) + MAJ(A, B, C); \
D += T1; \
H = T1 + T2; \
} while (0)
int i;
uint64_t a, b, c, d, e, f, g, h;
uint64_t w[80];
br_range_dec64be(w, 16, buf);
for (i = 16; i < 80; i ++) {
w[i] = SSG5_1(w[i - 2]) + w[i - 7]
+ SSG5_0(w[i - 15]) + w[i - 16];
}
a = val[0];
b = val[1];
c = val[2];
d = val[3];
e = val[4];
f = val[5];
g = val[6];
h = val[7];
for (i = 0; i < 80; i += 8) {
SHA2BIG_STEP(a, b, c, d, e, f, g, h, i + 0);
SHA2BIG_STEP(h, a, b, c, d, e, f, g, i + 1);
SHA2BIG_STEP(g, h, a, b, c, d, e, f, i + 2);
SHA2BIG_STEP(f, g, h, a, b, c, d, e, i + 3);
SHA2BIG_STEP(e, f, g, h, a, b, c, d, i + 4);
SHA2BIG_STEP(d, e, f, g, h, a, b, c, i + 5);
SHA2BIG_STEP(c, d, e, f, g, h, a, b, i + 6);
SHA2BIG_STEP(b, c, d, e, f, g, h, a, i + 7);
}
val[0] += a;
val[1] += b;
val[2] += c;
val[3] += d;
val[4] += e;
val[5] += f;
val[6] += g;
val[7] += h;
}
static void
sha2big_update(br_sha384_context *cc, const void *data, size_t len)
{
const unsigned char *buf;
size_t ptr;
buf = data;
ptr = (size_t)cc->count & 127;
cc->count += (uint64_t)len;
while (len > 0) {
size_t clen;
clen = 128 - ptr;
if (clen > len) {
clen = len;
}
memcpy(cc->buf + ptr, buf, clen);
ptr += clen;
buf += clen;
len -= clen;
if (ptr == 128) {
sha2big_round(cc->buf, cc->val);
ptr = 0;
}
}
}
static void
sha2big_out(const br_sha384_context *cc, void *dst, int num)
{
unsigned char buf[128];
uint64_t val[8];
size_t ptr;
ptr = (size_t)cc->count & 127;
memcpy(buf, cc->buf, ptr);
memcpy(val, cc->val, sizeof val);
buf[ptr ++] = 0x80;
if (ptr > 112) {
memset(buf + ptr, 0, 128 - ptr);
sha2big_round(buf, val);
memset(buf, 0, 112);
} else {
memset(buf + ptr, 0, 112 - ptr);
}
br_enc64be(buf + 112, cc->count >> 61);
br_enc64be(buf + 120, cc->count << 3);
sha2big_round(buf, val);
br_range_enc64be(dst, val, num);
}
/* see bearssl.h */
void
br_sha384_init(br_sha384_context *cc)
{
cc->vtable = &br_sha384_vtable;
memcpy(cc->val, IV384, sizeof IV384);
cc->count = 0;
}
/* see bearssl.h */
void
br_sha384_update(br_sha384_context *cc, const void *data, size_t len)
{
sha2big_update(cc, data, len);
}
/* see bearssl.h */
void
br_sha384_out(const br_sha384_context *cc, void *dst)
{
sha2big_out(cc, dst, 6);
}
/* see bearssl.h */
uint64_t
br_sha384_state(const br_sha384_context *cc, void *dst)
{
br_range_enc64be(dst, cc->val, 8);
return cc->count;
}
/* see bearssl.h */
void
br_sha384_set_state(br_sha384_context *cc, const void *stb, uint64_t count)
{
br_range_dec64be(cc->val, 8, stb);
cc->count = count;
}
/* see bearssl.h */
void
br_sha512_init(br_sha512_context *cc)
{
cc->vtable = &br_sha512_vtable;
memcpy(cc->val, IV512, sizeof IV512);
cc->count = 0;
}
/* see bearssl.h */
void
br_sha512_out(const br_sha512_context *cc, void *dst)
{
sha2big_out(cc, dst, 8);
}
/* see bearssl.h */
const br_hash_class br_sha384_vtable = {
sizeof(br_sha384_context),
BR_HASHDESC_ID(br_sha384_ID)
| BR_HASHDESC_OUT(48)
| BR_HASHDESC_STATE(64)
| BR_HASHDESC_LBLEN(7)
| BR_HASHDESC_MD_PADDING
| BR_HASHDESC_MD_PADDING_BE
| BR_HASHDESC_MD_PADDING_128,
(void (*)(const br_hash_class **))&br_sha384_init,
(void (*)(const br_hash_class **, const void *, size_t))
&br_sha384_update,
(void (*)(const br_hash_class *const *, void *))&br_sha384_out,
(uint64_t (*)(const br_hash_class *const *, void *))&br_sha384_state,
(void (*)(const br_hash_class **, const void *, uint64_t))
&br_sha384_set_state
};
/* see bearssl.h */
const br_hash_class br_sha512_vtable = {
sizeof(br_sha512_context),
BR_HASHDESC_ID(br_sha512_ID)
| BR_HASHDESC_OUT(64)
| BR_HASHDESC_STATE(64)
| BR_HASHDESC_LBLEN(7)
| BR_HASHDESC_MD_PADDING
| BR_HASHDESC_MD_PADDING_BE
| BR_HASHDESC_MD_PADDING_128,
(void (*)(const br_hash_class **))&br_sha512_init,
(void (*)(const br_hash_class **, const void *, size_t))
&br_sha512_update,
(void (*)(const br_hash_class *const *, void *))&br_sha512_out,
(uint64_t (*)(const br_hash_class *const *, void *))&br_sha512_state,
(void (*)(const br_hash_class **, const void *, uint64_t))
&br_sha512_set_state
};