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Patching Sigma Generator creation #516

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merged 4 commits into from
Jul 15, 2019
Merged

Patching Sigma Generator creation #516

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1e32446
Patching Sigma Generator creation
levonpetrosyan93 Jul 14, 2019
4d4955c
Applied review comments
levonpetrosyan93 Jul 14, 2019
040fdf6
Fixed typo and segmentation issue
levonpetrosyan93 Jul 15, 2019
2994123
Condition changed
levonpetrosyan93 Jul 15, 2019
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2 changes: 2 additions & 0 deletions src/secp256k1/include/GroupElement.h
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Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,8 @@ class GroupElement final {

std::size_t hash() const;

void set_base_g();

friend class MultiExponent;
private:
// Returns the secp object inside it.
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4 changes: 4 additions & 0 deletions src/secp256k1/src/cpp/GroupElement.cpp
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Expand Up @@ -550,4 +550,8 @@ const void* GroupElement::get_value() const {
return g_;
}

void GroupElement::set_base_g() {
secp256k1_gej_set_ge(reinterpret_cast<secp256k1_gej *>(g_), &secp256k1_ge_const_g);
}

} // namespace secp_primitives
16 changes: 14 additions & 2 deletions src/sigma/params.cpp
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@@ -1,3 +1,4 @@
#include "chainparams.h"
#include "params.h"

namespace sigma {
Expand All @@ -8,8 +9,19 @@ Params* Params::get_default() {
return instance;
else {
//fixing generator G;
GroupElement g("9216064434961179932092223867844635691966339998754536116709681652691785432045",
"33986433546870000256104618635743654523665060392313886665479090285075695067131");
GroupElement g;

if(::Params().GenConsensus().IsMain()) {
unsigned char buff[32] = {0};
GroupElement base;
base.set_base_g();
base.sha256(buff);
g.generate(buff);
}
else
g = GroupElement("9216064434961179932092223867844635691966339998754536116709681652691785432045",
"33986433546870000256104618635743654523665060392313886665479090285075695067131");

//fixing n and m; N = n^m = 16,384
int n = 4;
int m = 7;
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