307 lines
10 KiB
C
307 lines
10 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "c_kzg_4844_jni.h"
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#include "c_kzg_4844.h"
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static const char *TRUSTED_SETUP_NOT_LOADED = "Trusted Setup is not loaded.";
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KZGSettings *settings;
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void reset_trusted_setup()
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{
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if (settings)
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{
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if (settings->fs)
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{
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free_trusted_setup(settings);
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}
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free(settings);
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settings = NULL;
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}
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}
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void throw_exception(JNIEnv *env, const char *message)
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{
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jclass exception_class = (*env)->FindClass(env, "java/lang/RuntimeException");
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(*env)->ThrowNew(env, exception_class, message);
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}
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void throw_c_kzg_exception(JNIEnv *env, C_KZG_RET error_code, const char *message)
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{
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jclass exception_class = (*env)->FindClass(env, "ethereum/ckzg4844/CKZGException");
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jstring error_message = (*env)->NewStringUTF(env, message);
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jmethodID exception_init = (*env)->GetMethodID(env, exception_class, "<init>", "(ILjava/lang/String;)V");
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jobject exception = (*env)->NewObject(env, exception_class, exception_init, error_code, error_message);
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(*env)->Throw(env, exception);
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}
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void throw_invalid_size_exception(JNIEnv *env, const char *prefix, size_t size, size_t expected_size)
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{
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char message[100];
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sprintf(message, "%s Expected %zu bytes but got %zu.", prefix, expected_size, size);
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throw_c_kzg_exception(env, C_KZG_BADARGS, message);
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}
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KZGSettings *allocate_settings(JNIEnv *env) {
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KZGSettings *s = malloc(sizeof(KZGSettings));
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if (s == NULL)
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{
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throw_exception(env, "Failed to allocate memory for the Trusted Setup.");
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}
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else
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{
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s->fs = NULL;
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s->g1_values = NULL;
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s->g2_values = NULL;
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}
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return s;
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}
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JNIEXPORT jint JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_getFieldElementsPerBlob(JNIEnv *env, jclass thisCls)
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{
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return (jint)FIELD_ELEMENTS_PER_BLOB;
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}
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JNIEXPORT void JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_loadTrustedSetup__Ljava_lang_String_2(JNIEnv *env, jclass thisCls, jstring file)
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{
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if (settings)
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{
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throw_exception(env, "Trusted Setup is already loaded. Free it before loading a new one.");
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return;
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}
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settings = allocate_settings(env);
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const char *file_native = (*env)->GetStringUTFChars(env, file, 0);
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FILE *f = fopen(file_native, "r");
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if (f == NULL)
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{
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reset_trusted_setup();
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(*env)->ReleaseStringUTFChars(env, file, file_native);
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throw_exception(env, "Couldn't load Trusted Setup. File might not exist or there is a permission issue.");
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return;
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}
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C_KZG_RET ret = load_trusted_setup_file(settings, f);
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(*env)->ReleaseStringUTFChars(env, file, file_native);
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fclose(f);
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if (ret != C_KZG_OK)
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{
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reset_trusted_setup();
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throw_c_kzg_exception(env, ret, "There was an error while loading the Trusted Setup.");
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return;
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}
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}
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JNIEXPORT void JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_loadTrustedSetup___3BJ_3BJ(JNIEnv *env, jclass thisCls, jbyteArray g1, jlong g1Count, jbyteArray g2, jlong g2Count)
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{
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if (settings)
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{
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throw_exception(env, "Trusted Setup is already loaded. Free it before loading a new one.");
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return;
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}
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settings = allocate_settings(env);
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jbyte *g1_native = (*env)->GetByteArrayElements(env, g1, NULL);
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jbyte *g2_native = (*env)->GetByteArrayElements(env, g2, NULL);
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C_KZG_RET ret = load_trusted_setup(settings, (uint8_t *)g1_native, (size_t)g1Count, (uint8_t *)g2_native, (size_t)g2Count);
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(*env)->ReleaseByteArrayElements(env, g1, g1_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, g2, g2_native, JNI_ABORT);
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if (ret != C_KZG_OK)
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{
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reset_trusted_setup();
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throw_c_kzg_exception(env, ret, "There was an error while loading the Trusted Setup.");
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return;
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}
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}
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JNIEXPORT void JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_freeTrustedSetup(JNIEnv *env, jclass thisCls)
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{
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if (settings == NULL)
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{
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throw_exception(env, TRUSTED_SETUP_NOT_LOADED);
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return;
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}
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reset_trusted_setup();
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}
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JNIEXPORT jbyteArray JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_computeKzgProof(JNIEnv *env, jclass thisCls, jbyteArray blob, jbyteArray z_bytes)
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{
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if (settings == NULL)
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{
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throw_exception(env, TRUSTED_SETUP_NOT_LOADED);
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return NULL;
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}
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Blob *blob_native = (Blob *)(*env)->GetByteArrayElements(env, blob, NULL);
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Bytes32 *z_native = (Bytes32 *)(*env)->GetByteArrayElements(env, z_bytes, NULL);
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jbyteArray proof = (*env)->NewByteArray(env, BYTES_PER_PROOF);
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KZGProof *proof_native = (KZGProof *)(uint8_t *)(*env)->GetByteArrayElements(env, proof, NULL);
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C_KZG_RET ret = compute_kzg_proof(proof_native, blob_native, z_native, settings);
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(*env)->ReleaseByteArrayElements(env, blob, (jbyte *)blob_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, proof, (jbyte *)proof_native, 0);
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if (ret != C_KZG_OK)
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{
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throw_c_kzg_exception(env, ret, "There was an error while computing kzg proof.");
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return NULL;
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}
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return proof;
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}
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JNIEXPORT jbyteArray JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_computeAggregateKzgProof(JNIEnv *env, jclass thisCls, jbyteArray blobs, jlong count)
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{
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if (settings == NULL)
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{
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throw_exception(env, TRUSTED_SETUP_NOT_LOADED);
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return NULL;
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}
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size_t blobs_size = (size_t)(*env)->GetArrayLength(env, blobs);
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size_t expected_blobs_size = BYTES_PER_BLOB * (size_t)count;
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if (blobs_size != expected_blobs_size)
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{
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throw_invalid_size_exception(env, "Invalid blobs size.", blobs_size, expected_blobs_size);
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return NULL;
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}
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size_t count_native = (size_t)count;
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jbyte *blobs_native = (*env)->GetByteArrayElements(env, blobs, NULL);
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jbyteArray proof = (*env)->NewByteArray(env, BYTES_PER_PROOF);
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KZGProof *proof_native = (KZGProof *)(uint8_t *)(*env)->GetByteArrayElements(env, proof, NULL);
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C_KZG_RET ret = compute_aggregate_kzg_proof(proof_native, (const Blob *)blobs_native, count_native, settings);
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(*env)->ReleaseByteArrayElements(env, blobs, blobs_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, proof, (jbyte *)proof_native, 0);
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if (ret != C_KZG_OK)
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{
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throw_c_kzg_exception(env, ret, "There was an error while computing aggregate kzg proof.");
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return NULL;
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}
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return proof;
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}
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JNIEXPORT jboolean JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_verifyAggregateKzgProof(JNIEnv *env, jclass thisCls, jbyteArray blobs, jbyteArray commitments_bytes, jlong count, jbyteArray proof_bytes)
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{
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if (settings == NULL)
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{
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throw_exception(env, TRUSTED_SETUP_NOT_LOADED);
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return 0;
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}
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size_t count_native = (size_t)count;
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size_t blobs_size = (size_t)(*env)->GetArrayLength(env, blobs);
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size_t expected_blobs_size = BYTES_PER_BLOB * count_native;
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if (blobs_size != expected_blobs_size)
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{
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throw_invalid_size_exception(env, "Invalid blobs size.", blobs_size, expected_blobs_size);
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return 0;
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}
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size_t commitments_size = (size_t)(*env)->GetArrayLength(env, commitments_bytes);
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size_t expected_commitments_size = BYTES_PER_COMMITMENT * count_native;
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if (commitments_size != expected_commitments_size)
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{
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throw_invalid_size_exception(env, "Invalid commitments size.", commitments_size, expected_commitments_size);
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return 0;
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}
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Bytes48 *proof_native = (Bytes48 *)(*env)->GetByteArrayElements(env, proof_bytes, NULL);
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Bytes48 *commitments_native = (Bytes48 *)(*env)->GetByteArrayElements(env, commitments_bytes, NULL);
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jbyte *blobs_native = (*env)->GetByteArrayElements(env, blobs, NULL);
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bool out;
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C_KZG_RET ret = verify_aggregate_kzg_proof(&out, (const Blob *)blobs_native, commitments_native, count_native, proof_native, settings);
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(*env)->ReleaseByteArrayElements(env, proof_bytes, (jbyte *)proof_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, commitments_bytes, (jbyte *)commitments_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, blobs, blobs_native, JNI_ABORT);
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if (ret != C_KZG_OK)
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{
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throw_c_kzg_exception(env, ret, "There was an error while verifying aggregate kzg proof.");
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return 0;
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}
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return (jboolean)out;
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}
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JNIEXPORT jbyteArray JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_blobToKzgCommitment(JNIEnv *env, jclass thisCls, jbyteArray blob)
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{
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if (settings == NULL)
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{
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throw_exception(env, TRUSTED_SETUP_NOT_LOADED);
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return NULL;
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}
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size_t blob_size = (size_t)(*env)->GetArrayLength(env, blob);
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if (blob_size != BYTES_PER_BLOB)
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{
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throw_invalid_size_exception(env, "Invalid blob size.", blob_size, BYTES_PER_BLOB);
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return NULL;
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}
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jbyte *blob_native = (*env)->GetByteArrayElements(env, blob, NULL);
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jbyteArray commitment = (*env)->NewByteArray(env, BYTES_PER_COMMITMENT);
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KZGCommitment *commitment_native = (KZGCommitment *)(*env)->GetByteArrayElements(env, commitment, NULL);
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C_KZG_RET ret = blob_to_kzg_commitment(commitment_native, (const Blob *)blob_native, settings);
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(*env)->ReleaseByteArrayElements(env, blob, blob_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, commitment, (jbyte *)commitment_native, 0);
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if (ret != C_KZG_OK)
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{
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throw_c_kzg_exception(env, ret, "There was an error while converting blob to commitment.");
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return NULL;
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}
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return commitment;
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}
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JNIEXPORT jboolean JNICALL Java_ethereum_ckzg4844_CKZG4844JNI_verifyKzgProof(JNIEnv *env, jclass thisCls, jbyteArray commitment_bytes, jbyteArray z_bytes, jbyteArray y_bytes, jbyteArray proof_bytes)
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{
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if (settings == NULL)
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{
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throw_exception(env, TRUSTED_SETUP_NOT_LOADED);
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return 0;
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}
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Bytes48 *commitment_native = (Bytes48 *)(*env)->GetByteArrayElements(env, commitment_bytes, NULL);
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Bytes48 *proof_native = (Bytes48 *)(*env)->GetByteArrayElements(env, proof_bytes, NULL);
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Bytes32 *z_native = (Bytes32 *)(*env)->GetByteArrayElements(env, z_bytes, NULL);
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Bytes32 *y_native = (Bytes32 *)(*env)->GetByteArrayElements(env, y_bytes, NULL);
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bool out;
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C_KZG_RET ret = verify_kzg_proof(&out, commitment_native, z_native, y_native, proof_native, settings);
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(*env)->ReleaseByteArrayElements(env, commitment_bytes, (jbyte *)commitment_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, z_bytes, (jbyte *)z_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, y_bytes, (jbyte *)y_native, JNI_ABORT);
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(*env)->ReleaseByteArrayElements(env, proof_bytes, (jbyte *)proof_native, JNI_ABORT);
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if (ret != C_KZG_OK)
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{
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throw_c_kzg_exception(env, ret, "There was an error while verifying kzg proof.");
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return 0;
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}
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return (jboolean)out;
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}
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