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Add swig bindings for field element mapping to G1 and G2 #220

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Add swig bindings for field element mapping to G1 and G2 #220

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6713f80
add to swig bindings field element mapping for G1 and G2
garyschulte May 30, 2024
0462f2e
remove _g1 and _g2 suffixes from swg
garyschulte May 30, 2024
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4 changes: 2 additions & 2 deletions bindings/blst.h
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Original file line number Diff line number Diff line change
Expand Up @@ -273,10 +273,10 @@ void blst_p2s_tile_pippenger(blst_p2 *ret, const blst_p2_affine *const points[],
/*
* Hash-to-curve operations.
*/
#ifndef SWIG

void blst_map_to_g1(blst_p1 *out, const blst_fp *u, const blst_fp *v DEFNULL);

void blst_map_to_g2(blst_p2 *out, const blst_fp2 *u, const blst_fp2 *v DEFNULL);
#endif

void blst_encode_to_g1(blst_p1 *out,
const byte *msg, size_t msg_len,
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17 changes: 17 additions & 0 deletions bindings/blst.hpp
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Expand Up @@ -307,6 +307,14 @@ class P1 {
aug, aug_len);
return this;
}
P1* map_to(const byte *u)
{
blst_fp ret;
blst_fp_from_bendian(&ret, u);
blst_map_to_g1(&point, &ret, nullptr);
return this;
}

#if __cplusplus >= 201703L
P1* hash_to(const app__string_view msg, const std::string& DST = "",
const app__string_view aug = None)
Expand Down Expand Up @@ -605,6 +613,15 @@ class P2 {
aug, aug_len);
return this;
}
P2* map_to(const byte *u)
{
blst_fp2 fp2;
blst_fp_from_bendian(&fp2.fp[0], u);
blst_fp_from_bendian(&fp2.fp[1], u+48);
blst_map_to_g2(&point, &fp2, nullptr);
return this;
}

#if __cplusplus >= 201703L
P2* hash_to(const app__string_view msg, const std::string& DST = "",
const app__string_view aug = None)
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1 change: 1 addition & 0 deletions bindings/blst.swg
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Expand Up @@ -723,6 +723,7 @@ import java.nio.file.*;
blst::P1* sign_with, blst::P2* sign_with,
blst::P1* hash_to, blst::P2* hash_to,
blst::P1* encode_to, blst::P2* encode_to,
blst::P1* map_to, blst::P2* map_to,
blst::P1* mult, blst::P2* mult,
blst::P1* cneg, blst::P2* cneg,
blst::P1* neg, blst::P2* neg,
Expand Down