diff options
author | lloyd <[email protected]> | 2010-02-23 18:25:37 +0000 |
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committer | lloyd <[email protected]> | 2010-02-23 18:25:37 +0000 |
commit | 53b23d3ecb9f6967d27a7d613ab34a0564b1c0ff (patch) | |
tree | 929d3a40b0f504ca59ab2241ec570d66b5353293 | |
parent | c27d803e89c64a36392efa9e6256e48b90567d2f (diff) |
Remove vestigal code in pointgfp for various side-channel countermeasures
-rw-r--r-- | src/math/gfpmath/point_gfp.cpp | 57 |
1 files changed, 1 insertions, 56 deletions
diff --git a/src/math/gfpmath/point_gfp.cpp b/src/math/gfpmath/point_gfp.cpp index abf4451a6..baea38fed 100644 --- a/src/math/gfpmath/point_gfp.cpp +++ b/src/math/gfpmath/point_gfp.cpp @@ -222,64 +222,9 @@ PointGFp& PointGFp::mult_this_secure(const BigInt& scalar, return *this; } if(m == BigInt(1)) - { return *this; - } - // -#ifdef CM_AADA -#ifndef CM_RAND_EXP - int max_secr_bits = max_secr.bits(); -#endif -#endif - - int mul_bits = m.bits(); // this is used for a determined number of loop runs in - // the mult_loop where leading zero´s are padded if necessary. - // Here we assign the value that will be used when no countermeasures are specified -#ifdef CM_RAND_EXP - u32bit rand_r_bit_len = 20; // Coron(99) proposes 20 bit for r - -#ifdef CM_AADA - - BigInt r_max(1); - -#endif // CM_AADA - - // use randomized exponent -#ifdef TA_COLL_T - static BigInt r_randexp; - if(new_rand) - { - r_randexp = random_integer(rand_r_bit_len); - } - //assert(!r_randexp.is_zero()); -#else - BigInt r_randexp(random_integer(rand_r_bit_len)); -#endif - - m += r_randexp * point_order; - // determine mul_bits... -#ifdef CM_AADA - // AADA with rand. Exp. - //assert(rand_r_bit_len > 0); - r_max <<= rand_r_bit_len; - r_max -= 1; - //assert(r_max.bits() == rand_r_bit_len); - mul_bits = (max_secr + point_order * r_max).bits(); -#else - // rand. Exp. without AADA - mul_bits = m.bits(); -#endif // CM_AADA - - -#endif // CM_RAND_EXP - - // determine mul_bits... -#if(CM_AADA == 1 && CM_RAND_EXP != 1) - - mul_bits = max_secr_bits; -#endif // CM_AADA without CM_RAND_EXP - //assert(mul_bits != 0); + int mul_bits = m.bits(); for(int i = mul_bits - 1; i >= 0; i--) { |