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Add JNI wrapper for org.bitcoin.NativeSecp256k1 (bitcoinj)

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This isnt as optimal as it could be, but its also a very simple API
which is nice.
This commit is contained in:
Matt Corallo
2013-03-29 21:12:08 -04:00
parent 1662f086c7
commit b5efbe5891
4 changed files with 111 additions and 1 deletions
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23
src/java/org_bitcoin_NativeSecp256k1.c Normal file
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#include "org_bitcoin_NativeSecp256k1.h"
#include "include/secp256k1.h"
JNIEXPORT jint JNICALL Java_org_bitcoin_NativeSecp256k1_secp256k1_1ecdsa_1verify
(JNIEnv* env, jclass classObject, jobject byteBufferObject)
{
unsigned char* data = (unsigned char*) env->GetDirectBufferAddress(byteBufferObject);
int sigLen = *((int*)(data + 32));
int pubLen = *((int*)(data + 32 + 4));
return secp256k1_ecdsa_verify(data, 32, data+32+8, sigLen, data+32+8+sigLen, pubLen);
}
static void __javasecp256k1_attach(void) __attribute__((constructor));
static void __javasecp256k1_detach(void) __attribute__((destructor));
static void __javasecp256k1_attach(void) {
secp256k1_start();
}
static void __javasecp256k1_detach(void) {
secp256k1_stop();
}