Some cleanups (removed unused files, split i15 code into per-function files).

[BearSSL] / src / int / i15_ext1.c

diff --git a/src/int/i15_ext1.c b/src/int/i15_ext1.c
deleted file mode 100644 (file)
index a99ac1a..0000000
--- a/src/int/i15_ext1.c
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Copyright (c) 2017 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"
-
-/*
- * This file contains some additional functions for "i15" big integers.
- * These functions are needed to support ECDSA.
- */
-
-/* see inner.h */
-void
-br_i15_rshift(uint16_t *x, int count)
-{
-       size_t u, len;
-       unsigned r;
-
-       len = (x[0] + 15) >> 4;
-       if (len == 0) {
-               return;
-       }
-       r = x[1] >> count;
-       for (u = 2; u <= len; u ++) {
-               unsigned w;
-
-               w = x[u];
-               x[u - 1] = ((w << (15 - count)) | r) & 0x7FFF;
-               r = w >> count;
-       }
-       x[len] = r;
-}
-
-/* see inner.h */
-uint32_t
-br_i15_bit_length(uint16_t *x, size_t xlen)
-{
-       uint32_t tw, twk;
-
-       tw = 0;
-       twk = 0;
-       while (xlen -- > 0) {
-               uint32_t w, c;
-
-               c = EQ(tw, 0);
-               w = x[xlen];
-               tw = MUX(c, w, tw);
-               twk = MUX(c, (uint32_t)xlen, twk);
-       }
-       return (twk << 4) + BIT_LENGTH(tw);
-}
-
-/* see inner.h */
-void
-br_i15_decode(uint16_t *x, const void *src, size_t len)
-{
-       const unsigned char *buf;
-       size_t v;
-       uint32_t acc;
-       int acc_len;
-
-       buf = src;
-       v = 1;
-       acc = 0;
-       acc_len = 0;
-       while (len -- > 0) {
-               uint32_t b;
-
-               b = buf[len];
-               acc |= (b << acc_len);
-               acc_len += 8;
-               if (acc_len >= 15) {
-                       x[v ++] = acc & 0x7FFF;
-                       acc_len -= 15;
-                       acc >>= 15;
-               }
-       }
-       if (acc_len != 0) {
-               x[v ++] = acc;
-       }
-       x[0] = br_i15_bit_length(x + 1, v - 1);
-}
-
-/* see inner.h */
-void
-br_i15_from_monty(uint16_t *x, const uint16_t *m, uint16_t m0i)
-{
-       size_t len, u, v;
-
-       len = (m[0] + 15) >> 4;
-       for (u = 0; u < len; u ++) {
-               uint32_t f, cc;
-
-               f = MUL15(x[1], m0i) & 0x7FFF;
-               cc = 0;
-               for (v = 0; v < len; v ++) {
-                       uint32_t z;
-
-                       z = (uint32_t)x[v + 1] + MUL15(f, m[v + 1]) + cc;
-                       cc = z >> 15;
-                       if (v != 0) {
-                               x[v] = z & 0x7FFF;
-                       }
-               }
-               x[len] = cc;
-       }
-
-       /*
-        * We may have to do an extra subtraction, but only if the
-        * value in x[] is indeed greater than or equal to that of m[],
-        * which is why we must do two calls (first call computes the
-        * carry, second call performs the subtraction only if the carry
-        * is 0).
-        */
-       br_i15_sub(x, m, NOT(br_i15_sub(x, m, 0)));
-}