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Diffstat (limited to 'security/nss/lib/freebl/poly1305.c')
-rw-r--r--security/nss/lib/freebl/poly1305.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/security/nss/lib/freebl/poly1305.c b/security/nss/lib/freebl/poly1305.c
deleted file mode 100644
index eb3e3cd55c..0000000000
--- a/security/nss/lib/freebl/poly1305.c
+++ /dev/null
@@ -1,314 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* This implementation of poly1305 is by Andrew Moon
- * (https://github.com/floodyberry/poly1305-donna) and released as public
- * domain. */
-
-#include <string.h>
-
-#include "poly1305.h"
-
-#if defined(_MSC_VER) && _MSC_VER < 1600
-#include "prtypes.h"
-typedef PRUint32 uint32_t;
-typedef PRUint64 uint64_t;
-#else
-#include <stdint.h>
-#endif
-
-#if defined(NSS_X86) || defined(NSS_X64)
-/* We can assume little-endian. */
-static uint32_t
-U8TO32_LE(const unsigned char *m)
-{
- uint32_t r;
- memcpy(&r, m, sizeof(r));
- return r;
-}
-
-static void
-U32TO8_LE(unsigned char *m, uint32_t v)
-{
- memcpy(m, &v, sizeof(v));
-}
-#else
-static uint32_t
-U8TO32_LE(const unsigned char *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(unsigned char *m, uint32_t v)
-{
- m[0] = v;
- m[1] = v >> 8;
- m[2] = v >> 16;
- m[3] = v >> 24;
-}
-#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;
- unsigned char buf[16];
- unsigned int buf_used;
- unsigned char key[16];
-};
-
-/* update 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
-update(struct poly1305_state_st *state, const unsigned char *in,
- size_t len)
-{
- uint32_t t0, t1, t2, t3;
- uint64_t t[5];
- uint32_t b;
- uint64_t c;
- size_t j;
- unsigned char 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
-Poly1305Init(poly1305_state *statep, const unsigned char key[32])
-{
- struct poly1305_state_st *state = (struct poly1305_state_st *)statep;
- uint32_t t0, t1, t2, t3;
-
- 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
-Poly1305Update(poly1305_state *statep, const unsigned char *in,
- size_t in_len)
-{
- unsigned int i;
- struct poly1305_state_st *state = (struct poly1305_state_st *)statep;
-
- 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) {
- update(state, state->buf, 16);
- state->buf_used = 0;
- }
- }
-
- if (in_len >= 16) {
- size_t todo = in_len & ~0xf;
- 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
-Poly1305Finish(poly1305_state *statep, unsigned char 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 (state->buf_used)
- 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], (uint32_t)f0);
- f1 += (f0 >> 32);
- U32TO8_LE(&mac[4], (uint32_t)f1);
- f2 += (f1 >> 32);
- U32TO8_LE(&mac[8], (uint32_t)f2);
- f3 += (f2 >> 32);
- U32TO8_LE(&mac[12], (uint32_t)f3);
-}
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