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Expose uncompress and hash_to functions for JVM bindings #232

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Expose uncompress and hash_to functions for JVM bindings #232

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f59d245
add uncompress to bindings
nau Sep 5, 2024
253e813
add hash_to where DST is byte array.
nau Sep 5, 2024
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31 changes: 31 additions & 0 deletions bindings/blst.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -293,6 +293,14 @@ class P1 {
{ blst_sign_pk_in_g2(&point, &point, &sk.key); return this; }
P1* sign_with(const Scalar& scalar)
{ blst_sign_pk_in_g2(&point, &point, scalar); return this; }
P1* hash_to(const byte* msg, size_t msg_len,
const byte* DST,
size_t DST_len,
const byte* aug = nullptr, size_t aug_len = 0)
{ blst_hash_to_g1(&point, msg, msg_len, DST, DST_len,
aug, aug_len);
return this;
}
P1* hash_to(const byte* msg, size_t msg_len,
const std::string& DST = "",
const byte* aug = nullptr, size_t aug_len = 0)
Expand Down Expand Up @@ -343,6 +351,14 @@ class P1 {
#endif
static P1 generator()
{ return P1(blst_p1_generator()); }
static P1_Affine uncompress(const byte in[48])
{
P1_Affine ret;
BLST_ERROR err = blst_p1_uncompress(ret, in);
if (err != BLST_SUCCESS)
throw err;
return ret;
}

private:
friend class P1_Affine;
Expand Down Expand Up @@ -591,6 +607,13 @@ class P2 {
{ blst_sign_pk_in_g1(&point, &point, &sk.key); return this; }
P2* sign_with(const Scalar& scalar)
{ blst_sign_pk_in_g1(&point, &point, scalar); return this; }
P2* hash_to(const byte* msg, size_t msg_len,
const byte* DST, size_t DST_len,
const byte* aug = nullptr, size_t aug_len = 0)
{ blst_hash_to_g2(&point, msg, msg_len, DST, DST_len,
aug, aug_len);
return this;
}
P2* hash_to(const byte* msg, size_t msg_len,
const std::string& DST = "",
const byte* aug = nullptr, size_t aug_len = 0)
Expand Down Expand Up @@ -641,6 +664,14 @@ class P2 {
#endif
static P2 generator()
{ return P2(blst_p2_generator()); }
static P2_Affine uncompress(const byte in[96])
{
P2_Affine ret;
BLST_ERROR err = blst_p2_uncompress(ret, in);
if (err != BLST_SUCCESS)
throw err;
return ret;
}

private:
friend class P2_Affine;
Expand Down
2 changes: 2 additions & 0 deletions bindings/blst.swg
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Expand Up @@ -709,10 +709,12 @@ import java.nio.file.*;
%catches(BLST_ERROR) P1(const byte* in, size_t len);
%catches(BLST_ERROR) P1_Affine(const byte* in, size_t len);
%catches(BLST_ERROR) aggregate(const P1_Affine& in);
%catches(BLST_ERROR) uncompress(const byte in[48]);

%catches(BLST_ERROR) P2(const byte* in, size_t len);
%catches(BLST_ERROR) P2_Affine(const byte* in, size_t len);
%catches(BLST_ERROR) aggregate(const P2_Affine& in);
%catches(BLST_ERROR) uncompress(const byte in[96]);

%catches(BLST_ERROR) blst::Scalar::add;
%catches(BLST_ERROR) blst::Scalar::sub;
Expand Down