aboutsummaryrefslogtreecommitdiffhomepage
path: root/third_party/boringssl/src/crypto/poly1305/poly1305.c
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/boringssl/src/crypto/poly1305/poly1305.c')
-rw-r--r--third_party/boringssl/src/crypto/poly1305/poly1305.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/third_party/boringssl/src/crypto/poly1305/poly1305.c b/third_party/boringssl/src/crypto/poly1305/poly1305.c
deleted file mode 100644
index 5a49e2df94..0000000000
--- a/third_party/boringssl/src/crypto/poly1305/poly1305.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
-/* This implementation of poly1305 is by Andrew Moon
- * (https://github.com/floodyberry/poly1305-donna) and released as public
- * domain. */
-
-#include <openssl/poly1305.h>
-
-#include <string.h>
-
-#include <openssl/cpu.h>
-
-
-#if defined(OPENSSL_WINDOWS) || !defined(OPENSSL_X86_64)
-
-#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || defined(OPENSSL_ARM)
-/* We can assume little-endian. */
-static uint32_t U8TO32_LE(const uint8_t *m) {
- uint32_t r;
- memcpy(&r, m, sizeof(r));
- return r;
-}
-
-static void U32TO8_LE(uint8_t *m, uint32_t v) { memcpy(m, &v, sizeof(v)); }
-#else
-static uint32_t U8TO32_LE(const uint8_t *m) {
- return (uint32_t)m[0] | (uint32_t)m[1] << 8 | (uint32_t)m[2] << 16 |
- (uint32_t)m[3] << 24;
-}
-
-static void U32TO8_LE(uint8_t *m, uint32_t v) {
- m[0] = v;
- m[1] = v >> 8;
- m[2] = v >> 16;
- m[3] = v >> 24;
-}
-#endif
-
-#if defined(OPENSSL_ARM) && !defined(OPENSSL_NO_ASM)
-void CRYPTO_poly1305_init_neon(poly1305_state *state, const uint8_t key[32]);
-
-void CRYPTO_poly1305_update_neon(poly1305_state *state, const uint8_t *in,
- size_t in_len);
-
-void CRYPTO_poly1305_finish_neon(poly1305_state *state, uint8_t mac[16]);
-#endif
-
-static uint64_t mul32x32_64(uint32_t a, uint32_t b) { return (uint64_t)a * b; }
-
-struct poly1305_state_st {
- uint32_t r0, r1, r2, r3, r4;
- uint32_t s1, s2, s3, s4;
- uint32_t h0, h1, h2, h3, h4;
- uint8_t buf[16];
- unsigned int buf_used;
- uint8_t key[16];
-};
-
-/* poly1305_blocks updates |state| given some amount of input data. This
- * function may only be called with a |len| that is not a multiple of 16 at the
- * end of the data. Otherwise the input must be buffered into 16 byte blocks. */
-static void poly1305_update(struct poly1305_state_st *state, const uint8_t *in,
- size_t len) {
- uint32_t t0, t1, t2, t3;
- uint64_t t[5];
- uint32_t b;
- uint64_t c;
- size_t j;
- uint8_t mp[16];
-
- if (len < 16) {
- goto poly1305_donna_atmost15bytes;
- }
-
-poly1305_donna_16bytes:
- t0 = U8TO32_LE(in);
- t1 = U8TO32_LE(in + 4);
- t2 = U8TO32_LE(in + 8);
- t3 = U8TO32_LE(in + 12);
-
- in += 16;
- len -= 16;
-
- state->h0 += t0 & 0x3ffffff;
- state->h1 += ((((uint64_t)t1 << 32) | t0) >> 26) & 0x3ffffff;
- state->h2 += ((((uint64_t)t2 << 32) | t1) >> 20) & 0x3ffffff;
- state->h3 += ((((uint64_t)t3 << 32) | t2) >> 14) & 0x3ffffff;
- state->h4 += (t3 >> 8) | (1 << 24);
-
-poly1305_donna_mul:
- t[0] = mul32x32_64(state->h0, state->r0) + mul32x32_64(state->h1, state->s4) +
- mul32x32_64(state->h2, state->s3) + mul32x32_64(state->h3, state->s2) +
- mul32x32_64(state->h4, state->s1);
- t[1] = mul32x32_64(state->h0, state->r1) + mul32x32_64(state->h1, state->r0) +
- mul32x32_64(state->h2, state->s4) + mul32x32_64(state->h3, state->s3) +
- mul32x32_64(state->h4, state->s2);
- t[2] = mul32x32_64(state->h0, state->r2) + mul32x32_64(state->h1, state->r1) +
- mul32x32_64(state->h2, state->r0) + mul32x32_64(state->h3, state->s4) +
- mul32x32_64(state->h4, state->s3);
- t[3] = mul32x32_64(state->h0, state->r3) + mul32x32_64(state->h1, state->r2) +
- mul32x32_64(state->h2, state->r1) + mul32x32_64(state->h3, state->r0) +
- mul32x32_64(state->h4, state->s4);
- t[4] = mul32x32_64(state->h0, state->r4) + mul32x32_64(state->h1, state->r3) +
- mul32x32_64(state->h2, state->r2) + mul32x32_64(state->h3, state->r1) +
- mul32x32_64(state->h4, state->r0);
-
- state->h0 = (uint32_t)t[0] & 0x3ffffff;
- c = (t[0] >> 26);
- t[1] += c;
- state->h1 = (uint32_t)t[1] & 0x3ffffff;
- b = (uint32_t)(t[1] >> 26);
- t[2] += b;
- state->h2 = (uint32_t)t[2] & 0x3ffffff;
- b = (uint32_t)(t[2] >> 26);
- t[3] += b;
- state->h3 = (uint32_t)t[3] & 0x3ffffff;
- b = (uint32_t)(t[3] >> 26);
- t[4] += b;
- state->h4 = (uint32_t)t[4] & 0x3ffffff;
- b = (uint32_t)(t[4] >> 26);
- state->h0 += b * 5;
-
- if (len >= 16) {
- goto poly1305_donna_16bytes;
- }
-
-/* final bytes */
-poly1305_donna_atmost15bytes:
- if (!len) {
- return;
- }
-
- for (j = 0; j < len; j++) {
- mp[j] = in[j];
- }
- mp[j++] = 1;
- for (; j < 16; j++) {
- mp[j] = 0;
- }
- len = 0;
-
- t0 = U8TO32_LE(mp + 0);
- t1 = U8TO32_LE(mp + 4);
- t2 = U8TO32_LE(mp + 8);
- t3 = U8TO32_LE(mp + 12);
-
- state->h0 += t0 & 0x3ffffff;
- state->h1 += ((((uint64_t)t1 << 32) | t0) >> 26) & 0x3ffffff;
- state->h2 += ((((uint64_t)t2 << 32) | t1) >> 20) & 0x3ffffff;
- state->h3 += ((((uint64_t)t3 << 32) | t2) >> 14) & 0x3ffffff;
- state->h4 += (t3 >> 8);
-
- goto poly1305_donna_mul;
-}
-
-void CRYPTO_poly1305_init(poly1305_state *statep, const uint8_t key[32]) {
- struct poly1305_state_st *state = (struct poly1305_state_st *)statep;
- uint32_t t0, t1, t2, t3;
-
-#if defined(OPENSSL_ARM) && !defined(OPENSSL_NO_ASM)
- if (CRYPTO_is_NEON_functional()) {
- CRYPTO_poly1305_init_neon(statep, key);
- return;
- }
-#endif
-
- t0 = U8TO32_LE(key + 0);
- t1 = U8TO32_LE(key + 4);
- t2 = U8TO32_LE(key + 8);
- t3 = U8TO32_LE(key + 12);
-
- /* precompute multipliers */
- state->r0 = t0 & 0x3ffffff;
- t0 >>= 26;
- t0 |= t1 << 6;
- state->r1 = t0 & 0x3ffff03;
- t1 >>= 20;
- t1 |= t2 << 12;
- state->r2 = t1 & 0x3ffc0ff;
- t2 >>= 14;
- t2 |= t3 << 18;
- state->r3 = t2 & 0x3f03fff;
- t3 >>= 8;
- state->r4 = t3 & 0x00fffff;
-
- state->s1 = state->r1 * 5;
- state->s2 = state->r2 * 5;
- state->s3 = state->r3 * 5;
- state->s4 = state->r4 * 5;
-
- /* init state */
- state->h0 = 0;
- state->h1 = 0;
- state->h2 = 0;
- state->h3 = 0;
- state->h4 = 0;
-
- state->buf_used = 0;
- memcpy(state->key, key + 16, sizeof(state->key));
-}
-
-void CRYPTO_poly1305_update(poly1305_state *statep, const uint8_t *in,
- size_t in_len) {
- unsigned int i;
- struct poly1305_state_st *state = (struct poly1305_state_st *)statep;
-
-#if defined(OPENSSL_ARM) && !defined(OPENSSL_NO_ASM)
- if (CRYPTO_is_NEON_functional()) {
- CRYPTO_poly1305_update_neon(statep, in, in_len);
- return;
- }
-#endif
-
- if (state->buf_used) {
- unsigned int todo = 16 - state->buf_used;
- if (todo > in_len) {
- todo = in_len;
- }
- for (i = 0; i < todo; i++) {
- state->buf[state->buf_used + i] = in[i];
- }
- state->buf_used += todo;
- in_len -= todo;
- in += todo;
-
- if (state->buf_used == 16) {
- poly1305_update(state, state->buf, 16);
- state->buf_used = 0;
- }
- }
-
- if (in_len >= 16) {
- size_t todo = in_len & ~0xf;
- poly1305_update(state, in, todo);
- in += todo;
- in_len &= 0xf;
- }
-
- if (in_len) {
- for (i = 0; i < in_len; i++) {
- state->buf[i] = in[i];
- }
- state->buf_used = in_len;
- }
-}
-
-void CRYPTO_poly1305_finish(poly1305_state *statep, uint8_t mac[16]) {
- struct poly1305_state_st *state = (struct poly1305_state_st *)statep;
- uint64_t f0, f1, f2, f3;
- uint32_t g0, g1, g2, g3, g4;
- uint32_t b, nb;
-
-#if defined(OPENSSL_ARM) && !defined(OPENSSL_NO_ASM)
- if (CRYPTO_is_NEON_functional()) {
- CRYPTO_poly1305_finish_neon(statep, mac);
- return;
- }
-#endif
-
- if (state->buf_used) {
- poly1305_update(state, state->buf, state->buf_used);
- }
-
- b = state->h0 >> 26;
- state->h0 = state->h0 & 0x3ffffff;
- state->h1 += b;
- b = state->h1 >> 26;
- state->h1 = state->h1 & 0x3ffffff;
- state->h2 += b;
- b = state->h2 >> 26;
- state->h2 = state->h2 & 0x3ffffff;
- state->h3 += b;
- b = state->h3 >> 26;
- state->h3 = state->h3 & 0x3ffffff;
- state->h4 += b;
- b = state->h4 >> 26;
- state->h4 = state->h4 & 0x3ffffff;
- state->h0 += b * 5;
-
- g0 = state->h0 + 5;
- b = g0 >> 26;
- g0 &= 0x3ffffff;
- g1 = state->h1 + b;
- b = g1 >> 26;
- g1 &= 0x3ffffff;
- g2 = state->h2 + b;
- b = g2 >> 26;
- g2 &= 0x3ffffff;
- g3 = state->h3 + b;
- b = g3 >> 26;
- g3 &= 0x3ffffff;
- g4 = state->h4 + b - (1 << 26);
-
- b = (g4 >> 31) - 1;
- nb = ~b;
- state->h0 = (state->h0 & nb) | (g0 & b);
- state->h1 = (state->h1 & nb) | (g1 & b);
- state->h2 = (state->h2 & nb) | (g2 & b);
- state->h3 = (state->h3 & nb) | (g3 & b);
- state->h4 = (state->h4 & nb) | (g4 & b);
-
- f0 = ((state->h0) | (state->h1 << 26)) + (uint64_t)U8TO32_LE(&state->key[0]);
- f1 = ((state->h1 >> 6) | (state->h2 << 20)) +
- (uint64_t)U8TO32_LE(&state->key[4]);
- f2 = ((state->h2 >> 12) | (state->h3 << 14)) +
- (uint64_t)U8TO32_LE(&state->key[8]);
- f3 = ((state->h3 >> 18) | (state->h4 << 8)) +
- (uint64_t)U8TO32_LE(&state->key[12]);
-
- U32TO8_LE(&mac[0], f0);
- f1 += (f0 >> 32);
- U32TO8_LE(&mac[4], f1);
- f2 += (f1 >> 32);
- U32TO8_LE(&mac[8], f2);
- f3 += (f2 >> 32);
- U32TO8_LE(&mac[12], f3);
-}
-
-#endif /* OPENSSL_WINDOWS || !OPENSSL_X86_64 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-27 05:27:58 +0000