Add secp256k1 cbind.

add c_bind.hpp Change hpp to h. remove hpp.
AztecProtocol · May 2, 2023 · 8791169 · 8791169
1 parent 80f678a
commit 8791169
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diff --git a/cpp/src/barretenberg/crypto/ecdsa/c_bind.h b/cpp/src/barretenberg/crypto/ecdsa/c_bind.h
@@ -0,0 +1,29 @@
+#include <ecc/curves/secp256k1/secp256k1.hpp>
+
+#define WASM_EXPORT __attribute__((visibility("default")))
+
+extern "C" {
+
+WASM_EXPORT void ecdsa__compute_public_key(uint8_t const* private_key, uint8_t* public_key_buf);
+
+WASM_EXPORT void ecdsa__construct_signature(uint8_t const* message,
+                                            size_t msg_len,
+                                            uint8_t const* private_key,
+                                            uint8_t* output_sig_r,
+                                            uint8_t* output_sig_s,
+                                            uint8_t* output_sig_v);
+
+WASM_EXPORT void ecdsa__recover_public_key_from_signature(uint8_t const* message,
+                                                          size_t msg_len,
+                                                          uint8_t const* sig_r,
+                                                          uint8_t const* sig_s,
+                                                          uint8_t* sig_v,
+                                                          uint8_t* output_pub_key);
+
+WASM_EXPORT bool ecdsa__verify_signature(uint8_t const* message,
+                                         size_t msg_len,
+                                         uint8_t const* pub_key,
+                                         uint8_t const* sig_r,
+                                         uint8_t const* sig_s,
+                                         uint8_t const* sig_v);
+}
diff --git a/cpp/src/barretenberg/ecc/curves/secp256k1/c_bind.cpp b/cpp/src/barretenberg/ecc/curves/secp256k1/c_bind.cpp
@@ -0,0 +1,30 @@
+#include "secp256k1.hpp"
+
+#define WASM_EXPORT __attribute__((visibility("default")))
+
+extern "C" {
+
+WASM_EXPORT void ecc_secp256k1__mul(uint8_t const* point_buf, uint8_t const* scalar_buf, uint8_t* result)
+{
+    auto point = from_buffer<secp256k1::g1::affine_element>(point_buf);
+    auto scalar = from_buffer<secp256k1::fr>(scalar_buf);
+    secp256k1::g1::affine_element r = point * scalar;
+    write(result, r);
+}
+
+WASM_EXPORT void ecc_secp256k1__get_random_scalar_mod_circuit_modulus(uint8_t* result)
+{
+    barretenberg::fr output = barretenberg::fr::random_element();
+    write(result, output);
+}
+
+WASM_EXPORT void ecc_secp256k1__reduce512_buffer_mod_circuit_modulus(uint8_t* input, uint8_t* result)
+{
+    uint512_t bigint_input = from_buffer<uint512_t>(input);
+
+    uint512_t barretenberg_modulus(barretenberg::fr::modulus);
+
+    uint512_t target_output = bigint_input % barretenberg_modulus;
+    write(result, target_output.lo);
+}
+}
diff --git a/cpp/src/barretenberg/ecc/curves/secp256k1/c_bind.hpp b/cpp/src/barretenberg/ecc/curves/secp256k1/c_bind.hpp
@@ -0,0 +1,12 @@
+#include "secp256k1.hpp"
+
+#define WASM_EXPORT __attribute__((visibility("default")))
+
+extern "C" {
+
+WASM_EXPORT void ecc_secp256k1__mul(uint8_t const* point_buf, uint8_t const* scalar_buf, uint8_t* result);
+
+WASM_EXPORT void ecc_secp256k1__get_random_scalar_mod_circuit_modulus(uint8_t* result);
+
+WASM_EXPORT void ecc_secp256k1__reduce512_buffer_mod_circuit_modulus(uint8_t* input, uint8_t* result);
+}