diff options
author | lloyd <[email protected]> | 2014-01-01 21:20:55 +0000 |
---|---|---|
committer | lloyd <[email protected]> | 2014-01-01 21:20:55 +0000 |
commit | 197dc467dec28a04c3b2f30da7cef122dfbb13e9 (patch) | |
tree | cdbd3ddaec051c72f0a757db461973d90c37b97a /src/math/mp/mp_monty.cpp | |
parent | 62faac373c07cfe10bc8c309e89ebdd30d8e5eaa (diff) |
Shuffle things around. Add NIST X.509 test to build.
Diffstat (limited to 'src/math/mp/mp_monty.cpp')
-rw-r--r-- | src/math/mp/mp_monty.cpp | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/src/math/mp/mp_monty.cpp b/src/math/mp/mp_monty.cpp deleted file mode 100644 index 095457dbe..000000000 --- a/src/math/mp/mp_monty.cpp +++ /dev/null @@ -1,101 +0,0 @@ -/* -* Montgomery Reduction -* (C) 1999-2011 Jack Lloyd -* 2006 Luca Piccarreta -* -* Distributed under the terms of the Botan license -*/ - -#include <botan/internal/mp_core.h> -#include <botan/internal/mp_madd.h> -#include <botan/internal/mp_asmi.h> -#include <botan/mem_ops.h> - -namespace Botan { - -extern "C" { - -/* -* Montgomery Reduction Algorithm -*/ -void bigint_monty_redc(word z[], - const word p[], size_t p_size, - word p_dash, word ws[]) - { - const size_t z_size = 2*(p_size+1); - - const size_t blocks_of_8 = p_size - (p_size % 8); - - for(size_t i = 0; i != p_size; ++i) - { - word* z_i = z + i; - - const word y = z_i[0] * p_dash; - - /* - bigint_linmul3(ws, p, p_size, y); - bigint_add2(z_i, z_size - i, ws, p_size+1); - */ - - word carry = 0; - - for(size_t j = 0; j != blocks_of_8; j += 8) - carry = word8_madd3(z_i + j, p + j, y, carry); - - for(size_t j = blocks_of_8; j != p_size; ++j) - z_i[j] = word_madd3(p[j], y, z_i[j], &carry); - - word z_sum = z_i[p_size] + carry; - carry = (z_sum < z_i[p_size]); - z_i[p_size] = z_sum; - - for(size_t j = p_size + 1; carry && j != z_size - i; ++j) - { - ++z_i[j]; - carry = !z_i[j]; - } - } - - word borrow = 0; - for(size_t i = 0; i != p_size; ++i) - ws[i] = word_sub(z[p_size + i], p[i], &borrow); - - ws[p_size] = word_sub(z[p_size+p_size], 0, &borrow); - - copy_mem(ws + p_size + 1, z + p_size, p_size + 1); - - copy_mem(z, ws + borrow*(p_size+1), p_size + 1); - clear_mem(z + p_size + 1, z_size - p_size - 1); - } - -void bigint_monty_mul(word z[], size_t z_size, - const word x[], size_t x_size, size_t x_sw, - const word y[], size_t y_size, size_t y_sw, - const word p[], size_t p_size, word p_dash, - word ws[]) - { - bigint_mul(&z[0], z_size, &ws[0], - &x[0], x_size, x_sw, - &y[0], y_size, y_sw); - - bigint_monty_redc(&z[0], - &p[0], p_size, p_dash, - &ws[0]); - } - -void bigint_monty_sqr(word z[], size_t z_size, - const word x[], size_t x_size, size_t x_sw, - const word p[], size_t p_size, word p_dash, - word ws[]) - { - bigint_sqr(&z[0], z_size, &ws[0], - &x[0], x_size, x_sw); - - bigint_monty_redc(&z[0], - &p[0], p_size, p_dash, - &ws[0]); - } - -} - -} |