250 lines
9.8 KiB
C
250 lines
9.8 KiB
C
#define PY_SSIZE_T_CLEAN
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#include <Python.h>
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#include "c_kzg_4844.h"
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static void free_KZGSettings(PyObject *c) {
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KZGSettings *s = PyCapsule_GetPointer(c, "KZGSettings");
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free_trusted_setup(s);
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free(s);
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}
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static PyObject* load_trusted_setup_wrap(PyObject *self, PyObject *args) {
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PyObject *f;
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if (!PyArg_ParseTuple(args, "U", &f))
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return PyErr_Format(PyExc_ValueError, "expected a string");
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KZGSettings *s = (KZGSettings*)malloc(sizeof(KZGSettings));
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if (s == NULL) return PyErr_NoMemory();
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if (load_trusted_setup_file(s, fopen(PyUnicode_AsUTF8(f), "r")) != C_KZG_OK) {
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free(s);
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return PyErr_Format(PyExc_RuntimeError, "error loading trusted setup");
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}
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return PyCapsule_New(s, "KZGSettings", free_KZGSettings);
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}
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static PyObject* blob_to_kzg_commitment_wrap(PyObject *self, PyObject *args) {
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PyObject *b;
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PyObject *s;
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if (!PyArg_UnpackTuple(args, "blob_to_kzg_commitment_wrap", 2, 2, &b, &s) ||
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!PyBytes_Check(b) ||
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!PyCapsule_IsValid(s, "KZGSettings"))
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return PyErr_Format(PyExc_ValueError, "expected bytes and trusted setup");
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if (PyBytes_Size(b) != BYTES_PER_BLOB)
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return PyErr_Format(PyExc_ValueError, "expected blobs to be BYTES_PER_BLOB bytes");
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PyObject *out = PyBytes_FromStringAndSize(NULL, BYTES_PER_COMMITMENT);
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if (out == NULL) return PyErr_NoMemory();
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Blob *blob = (Blob *)PyBytes_AsString(b);
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KZGCommitment *k = (KZGCommitment *)PyBytes_AsString(out);
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if (blob_to_kzg_commitment(k, blob, PyCapsule_GetPointer(s, "KZGSettings")) != C_KZG_OK) {
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Py_DECREF(out);
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return PyErr_Format(PyExc_RuntimeError, "blob_to_kzg_commitment failed");
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}
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return out;
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}
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static PyObject* compute_kzg_proof_wrap(PyObject *self, PyObject *args) {
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PyObject *b, *z, *s;
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if (!PyArg_UnpackTuple(args, "compute_kzg_proof_wrap", 3, 3, &b, &z, &s) ||
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!PyBytes_Check(b) ||
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!PyBytes_Check(z) ||
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!PyCapsule_IsValid(s, "KZGSettings"))
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return PyErr_Format(PyExc_ValueError, "expected bytes, bytes, trusted setup");
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if (PyBytes_Size(b) != BYTES_PER_BLOB)
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return PyErr_Format(PyExc_ValueError, "expected blobs to be BYTES_PER_BLOB bytes");
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if (PyBytes_Size(z) != BYTES_PER_FIELD_ELEMENT)
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return PyErr_Format(PyExc_ValueError, "expected blobs to be BYTES_PER_FIELD_ELEMENT bytes");
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PyObject *py_y = PyBytes_FromStringAndSize(NULL, BYTES_PER_FIELD_ELEMENT);
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if (py_y == NULL) return PyErr_NoMemory();
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PyObject *py_proof = PyBytes_FromStringAndSize(NULL, BYTES_PER_PROOF);
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if (py_proof == NULL) return PyErr_NoMemory();
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PyObject *out = PyTuple_Pack(2, py_proof, py_y);
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if (out == NULL) return PyErr_NoMemory();
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Blob *blob = (Blob *)PyBytes_AsString(b);
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Bytes32 *z_bytes = (Bytes32 *)PyBytes_AsString(z);
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KZGProof *proof = (KZGProof *)PyBytes_AsString(py_proof);
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Bytes32 *y_bytes = (Bytes32 *)PyBytes_AsString(py_y);
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if (compute_kzg_proof(proof, y_bytes, blob, z_bytes, PyCapsule_GetPointer(s, "KZGSettings")) != C_KZG_OK) {
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Py_DECREF(out);
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return PyErr_Format(PyExc_RuntimeError, "compute_kzg_proof failed");
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}
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return out;
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}
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static PyObject* compute_blob_kzg_proof_wrap(PyObject *self, PyObject *args) {
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PyObject *b, *c, *s;
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if (!PyArg_UnpackTuple(args, "compute_blob_kzg_proof_wrap", 3, 3, &b, &c, &s) ||
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!PyBytes_Check(b) ||
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!PyBytes_Check(c) ||
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!PyCapsule_IsValid(s, "KZGSettings"))
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return PyErr_Format(PyExc_ValueError, "expected bytes, bytes, trusted setup");
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if (PyBytes_Size(b) != BYTES_PER_BLOB)
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return PyErr_Format(PyExc_ValueError, "expected blobs to be BYTES_PER_BLOB bytes");
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if (PyBytes_Size(c) != BYTES_PER_COMMITMENT)
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return PyErr_Format(PyExc_ValueError, "expected commitment to be BYTES_PER_COMMITMENT bytes");
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PyObject *out = PyBytes_FromStringAndSize(NULL, BYTES_PER_PROOF);
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if (out == NULL) return PyErr_NoMemory();
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Blob *blob = (Blob *)PyBytes_AsString(b);
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Bytes48 *commitment_bytes = (Bytes48 *)PyBytes_AsString(c);
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KZGProof *proof = (KZGProof *)PyBytes_AsString(out);
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if (compute_blob_kzg_proof(proof, blob, commitment_bytes, PyCapsule_GetPointer(s, "KZGSettings")) != C_KZG_OK) {
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Py_DECREF(out);
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return PyErr_Format(PyExc_RuntimeError, "compute_blob_kzg_proof failed");
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}
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return out;
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}
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static PyObject* verify_kzg_proof_wrap(PyObject *self, PyObject *args) {
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PyObject *c, *z, *y, *p, *s;
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if (!PyArg_UnpackTuple(args, "verify_kzg_proof", 5, 5, &c, &z, &y, &p, &s) ||
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!PyBytes_Check(c) ||
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!PyBytes_Check(z) ||
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!PyBytes_Check(y) ||
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!PyBytes_Check(p) ||
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!PyCapsule_IsValid(s, "KZGSettings"))
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return PyErr_Format(PyExc_ValueError,
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"expected bytes, bytes, bytes, bytes, trusted setup");
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if (PyBytes_Size(c) != BYTES_PER_COMMITMENT)
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return PyErr_Format(PyExc_ValueError, "expected commitment to be BYTES_PER_COMMITMENT bytes");
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if (PyBytes_Size(z) != BYTES_PER_FIELD_ELEMENT)
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return PyErr_Format(PyExc_ValueError, "expected z to be BYTES_PER_FIELD_ELEMENT bytes");
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if (PyBytes_Size(y) != BYTES_PER_FIELD_ELEMENT)
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return PyErr_Format(PyExc_ValueError, "expected y to be BYTES_PER_FIELD_ELEMENT bytes");
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if (PyBytes_Size(p) != BYTES_PER_PROOF)
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return PyErr_Format(PyExc_ValueError, "expected proof to be BYTES_PER_PROOF bytes");
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const Bytes48 *commitment_bytes = (Bytes48 *)PyBytes_AsString(c);
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const Bytes32 *z_bytes = (Bytes32 *)PyBytes_AsString(z);
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const Bytes32 *y_bytes = (Bytes32 *)PyBytes_AsString(y);
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const Bytes48 *proof_bytes = (Bytes48 *)PyBytes_AsString(p);
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bool ok;
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if (verify_kzg_proof(&ok,
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commitment_bytes, z_bytes, y_bytes, proof_bytes,
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PyCapsule_GetPointer(s, "KZGSettings")) != C_KZG_OK) {
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return PyErr_Format(PyExc_RuntimeError, "verify_kzg_proof failed");
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}
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if (ok) Py_RETURN_TRUE; else Py_RETURN_FALSE;
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}
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static PyObject* verify_blob_kzg_proof_wrap(PyObject *self, PyObject *args) {
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PyObject *b, *c, *p, *s;
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if (!PyArg_UnpackTuple(args, "verify_blob_kzg_proof", 4, 4, &b, &c, &p, &s) ||
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!PyBytes_Check(b) ||
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!PyBytes_Check(c) ||
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!PyBytes_Check(p) ||
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!PyCapsule_IsValid(s, "KZGSettings"))
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return PyErr_Format(PyExc_ValueError,
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"expected bytes, bytes, bytes, trusted setup");
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if (PyBytes_Size(b) != BYTES_PER_BLOB)
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return PyErr_Format(PyExc_ValueError, "expected blob to be BYTES_PER_BLOB bytes");
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if (PyBytes_Size(c) != BYTES_PER_COMMITMENT)
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return PyErr_Format(PyExc_ValueError, "expected commitment to be BYTES_PER_COMMITMENT bytes");
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if (PyBytes_Size(p) != BYTES_PER_PROOF)
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return PyErr_Format(PyExc_ValueError, "expected proof to be BYTES_PER_PROOF bytes");
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const Blob *blob_bytes = (Blob *)PyBytes_AsString(b);
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const Bytes48 *commitment_bytes = (Bytes48 *)PyBytes_AsString(c);
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const Bytes48 *proof_bytes = (Bytes48 *)PyBytes_AsString(p);
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bool ok;
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if (verify_blob_kzg_proof(&ok,
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blob_bytes, commitment_bytes, proof_bytes,
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PyCapsule_GetPointer(s, "KZGSettings")) != C_KZG_OK) {
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return PyErr_Format(PyExc_RuntimeError, "verify_blob_kzg_proof failed");
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}
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if (ok) Py_RETURN_TRUE; else Py_RETURN_FALSE;
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}
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static PyObject* verify_blob_kzg_proof_batch_wrap(PyObject *self, PyObject *args) {
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PyObject *b, *c, *p, *s;
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if (!PyArg_UnpackTuple(args, "verify_blob_kzg_proof_batch", 4, 4, &b, &c, &p, &s) ||
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!PyBytes_Check(b) ||
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!PyBytes_Check(c) ||
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!PyBytes_Check(p) ||
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!PyCapsule_IsValid(s, "KZGSettings"))
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return PyErr_Format(PyExc_ValueError,
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"expected bytes, bytes, bytes, trusted setup");
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Py_ssize_t blobs_count = PyBytes_Size(b);
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if (blobs_count % BYTES_PER_BLOB != 0)
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return PyErr_Format(PyExc_ValueError, "expected blobs to be a multiple of BYTES_PER_BLOB bytes");
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blobs_count = blobs_count / BYTES_PER_BLOB;
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Py_ssize_t commitments_count = PyBytes_Size(c);
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if (commitments_count % BYTES_PER_COMMITMENT != 0)
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return PyErr_Format(PyExc_ValueError, "expected commitments to be a multiple of BYTES_PER_COMMITMENT bytes");
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commitments_count = commitments_count / BYTES_PER_COMMITMENT;
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Py_ssize_t proofs_count = PyBytes_Size(p);
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if (proofs_count % BYTES_PER_PROOF != 0)
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return PyErr_Format(PyExc_ValueError, "expected blobs to be a multiple of BYTES_PER_PROOF bytes");
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proofs_count = proofs_count / BYTES_PER_PROOF;
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if (blobs_count != commitments_count || blobs_count != proofs_count) {
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return PyErr_Format(PyExc_ValueError, "expected same number of blobs/commitments/proofs");
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}
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const Blob *blobs_bytes = (Blob *)PyBytes_AsString(b);
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const Bytes48 *commitments_bytes = (Bytes48 *)PyBytes_AsString(c);
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const Bytes48 *proofs_bytes = (Bytes48 *)PyBytes_AsString(p);
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bool ok;
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if (verify_blob_kzg_proof_batch(&ok,
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blobs_bytes, commitments_bytes, proofs_bytes, blobs_count,
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PyCapsule_GetPointer(s, "KZGSettings")) != C_KZG_OK) {
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return PyErr_Format(PyExc_RuntimeError, "verify_blob_kzg_proof_batch failed");
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}
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if (ok) Py_RETURN_TRUE; else Py_RETURN_FALSE;
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}
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static PyMethodDef ckzgmethods[] = {
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{"load_trusted_setup", load_trusted_setup_wrap, METH_VARARGS, "Load trusted setup from file path"},
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{"blob_to_kzg_commitment", blob_to_kzg_commitment_wrap, METH_VARARGS, "Create a commitment from a blob"},
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{"compute_kzg_proof", compute_kzg_proof_wrap, METH_VARARGS, "Compute a proof for a blob/field"},
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{"compute_blob_kzg_proof", compute_blob_kzg_proof_wrap, METH_VARARGS, "Compute a proof for a blob"},
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{"verify_kzg_proof", verify_kzg_proof_wrap, METH_VARARGS, "Verify a proof for the given inputs"},
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{"verify_blob_kzg_proof", verify_blob_kzg_proof_wrap, METH_VARARGS, "Verify a blob/commitment/proof combo"},
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{"verify_blob_kzg_proof_batch", verify_blob_kzg_proof_batch_wrap, METH_VARARGS, "Verify multiple blob/commitment/proof combos"},
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{NULL, NULL, 0, NULL}
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};
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static struct PyModuleDef ckzg = {
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PyModuleDef_HEAD_INIT,
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"ckzg",
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NULL,
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-1,
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ckzgmethods
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};
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PyMODINIT_FUNC PyInit_ckzg(void) {
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return PyModule_Create(&ckzg);
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}
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