diff options
| -rw-r--r-- | src/ringct/bulletproofs_plus.cc | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/ringct/bulletproofs_plus.cc b/src/ringct/bulletproofs_plus.cc index 743598b5a..fd2ebfce0 100644 --- a/src/ringct/bulletproofs_plus.cc +++ b/src/ringct/bulletproofs_plus.cc @@ -224,9 +224,9 @@ namespace rct // Output (1,x,x**2,...,x**{n-1}) static rct::keyV vector_of_scalar_powers(const rct::key &x, size_t n) { + CHECK_AND_ASSERT_THROW_MES(n != 0, "Need n > 0"); + rct::keyV res(n); - if (n == 0) - return res; res[0] = rct::identity(); if (n == 1) return res; @@ -244,6 +244,7 @@ namespace rct static rct::key sum_of_even_powers(const rct::key &x, size_t n) { CHECK_AND_ASSERT_THROW_MES((n & (n - 1)) == 0, "Need n to be a power of 2"); + CHECK_AND_ASSERT_THROW_MES(n != 0, "Need n > 0"); rct::key x1 = copy(x); sc_mul(x1.bytes, x1.bytes, x1.bytes); @@ -264,6 +265,8 @@ namespace rct // Output x**1 + x**2 + x**3 + ... + x**n static rct::key sum_of_scalar_powers(const rct::key &x, size_t n) { + CHECK_AND_ASSERT_THROW_MES(n != 0, "Need n > 0"); + rct::key res = ONE; if (n == 1) return res; @@ -764,6 +767,11 @@ try_again: rct::addKeys2(B, temp2, temp, rct::H); rct::key e = transcript_update(transcript, A1, B); + if (e == rct::zero()) + { + MINFO("e is 0, trying again"); + goto try_again; + } rct::key e_squared; sc_mul(e_squared.bytes, e.bytes, e.bytes); |