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Improve pointer handling logic

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This commit is contained in:
kngako
2024-08-14 09:14:34 +02:00
parent 41ddd40691
commit 32ee077995
4 changed files with 28 additions and 24 deletions
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4
jni/c/headers/java/fr_acinq_secp256k1_Secp256k1CFunctions.h
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@@ -270,10 +270,10 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
/*
* Class: fr_acinq_secp256k1_Secp256k1CFunctions
* Method: secp256k1_frost_shares_gen
* Signature: (J[BII[[B)[[[B
* Signature: (J[B[BII[[B)[[[B
*/
JNIEXPORT jobjectArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1frost_1shares_1gen
(JNIEnv *, jclass, jlong, jbyteArray, jint, jint, jobjectArray);
(JNIEnv *, jclass, jlong, jbyteArray, jbyteArray, jint, jint, jobjectArray);
/*
* Class: fr_acinq_secp256k1_Secp256k1CFunctions

41
jni/c/src/fr_acinq_secp256k1_Secp256k1CFunctions.c
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@@ -1354,13 +1354,14 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
* Method: secp256k1_frost_shares_gen
* Signature: (J[B[BII[[B)[[[B
*/
JNIEXPORT jobjectArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1frost_1shares_1gen(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jseed32, jint jthreshold, jint jn_participants, jobjectArray jids33)
JNIEXPORT jobjectArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1frost_1shares_1gen
(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jpok64, jbyteArray jseed32, jint jthreshold, jint jn_participants, jobjectArray jids33)
{
secp256k1_context *ctx = (secp256k1_context *)jctx;
secp256k1_frost_share *shares;
secp256k1_pubkey* vss_commitment;
unsigned char pok64[64];
jbyte* pok64;
size_t size;
@@ -1388,36 +1389,40 @@ JNIEXPORT jobjectArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp2
size = (*penv)->GetArrayLength(penv, jids33);
CHECKRESULT(size != jn_participants, "invalid ids33 size");
CHECKRESULT((*penv)->GetArrayLength(penv, jpok64) != 64, "pok64 length must be 64 bytes");
shares = calloc(jn_participants, sizeof(secp256k1_frost_share*));
vss_commitment = calloc(jthreshold, sizeof(secp256k1_pubkey*));
for (i = 0; i < jn_participants; i++)
{
jbyteArray id33 = (jbyteArray)(*penv)->GetObjectArrayElement(penv, jids33, i);
// TODO: Check id33 size is 33...
ids33[i] = (*penv)->GetByteArrayElements(penv, id33, 0);
ids33[i] = (*penv)->GetByteArrayElements(penv, id33, 0); // TODO: use setElement
}
int result = 0;
pok64 = (*penv)->GetByteArrayElements(penv, jpok64, 0);
result = secp256k1_frost_shares_gen(
ctx,
shares,
vss_commitment,
pok64,
(unsigned char *) pok64,
seed32,
jthreshold,
jn_participants,
ids33
);
(*penv)->ReleaseByteArrayElements(penv, jseed32, seed32, 0);
(*penv)->ReleaseByteArrayElements(penv, jpok64, pok64, 0);
CHECKRESULT(!result, "secp256k1_frost_shares_gen failed");
jbyte* jpok64;
jobjectArray output = (*penv)->NewObjectArray(penv, 3, jobjectArray, NULL);
jobjectArray output = (*penv)->NewObjectArray(penv, 2, jobjectArray, NULL);
output[0] = (*penv)->NewObjectArray(penv, jn_participants, jbyteArray, NULL);
output[1] = (*penv)->NewObjectArray(penv, jthreshold, jbyteArray, NULL);
output[2] = (*penv)->NewObjectArray(penv, 1, jbyteArray, NULL);
// TODO: Copy over the required data...
return output;
@@ -1576,22 +1581,20 @@ JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1fr
CHECKRESULT(jthreshold <= 0, "threshold can't be 0");
share = calloc(1, sizeof(secp256k1_frost_share));
size = (*penv)->GetArrayLength(penv, jshare);
CHECKRESULT1(size != sizeof(secp256k1_frost_share), "invalid share size", free(&share));
in32 = (*penv)->GetByteArrayElements(penv, jshare, 0);
result = secp256k1_frost_share_parse(ctx, share, (unsigned char *)in32);
result = secp256k1_frost_share_parse(ctx, &share, (unsigned char *)in32);
(*penv)->ReleaseByteArrayElements(penv, jshare, in32, 0);
CHECKRESULT1(!result, "secp256k1_frost_share_parse failed", free(&share));
id33 = (*penv)->GetByteArrayElements(penv, jid33, 0);
vss_commitment = calloc(1, sizeof(secp256k1_pubkey));
jpub = (jbyteArray)(*penv)->GetObjectArrayElement(penv, jvss_commitment, i);
size = (*penv)->GetArrayLength(penv, jpub);
CHECKRESULT1((size != 33) && (size != 65), "invalid public key size", free_pubkeys(pubkeys, count));
jpub = (*penv)->GetByteArrayElements(penv, jpub, 0);
result = secp256k1_ec_pubkey_parse(ctx, vss_commitment, (unsigned char *)jpub, size);
result = secp256k1_ec_pubkey_parse(ctx, &vss_commitment, (unsigned char *)jpub, size);
(*penv)->ReleaseByteArrayElements(penv, jpub, jpub, 0);
CHECKRESULT1(!result, "secp256k1_ec_pubkey_parse failed", free(vss_commitment));
@@ -1876,11 +1879,10 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
copy_bytes_from_java(penv, jsession_id32, size, session_id32);
if (jshare != NULL) {
share = calloc(1, sizeof(secp256k1_frost_share));
size = (*penv)->GetArrayLength(penv, jshare);
// TODO: CHECKRESULT1(size != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE, "invalid public nonce size", free_nonces(pubnonces, count));
in32 = (*penv)->GetByteArrayElements(penv, jshare, 0);
result = secp256k1_frost_share_parse(ctx, share, (unsigned char *)in32);
result = secp256k1_frost_share_parse(ctx, &share, (unsigned char *)in32);
(*penv)->ReleaseByteArrayElements(penv, jshare, in32, 0);
// TODO: CHECKRESULT1(!result, "secp256k1_frost_share_parse failed", free_shares(shares, count));
@@ -2096,13 +2098,12 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
copy_bytes_from_java(penv, jsecnonce, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE, secnonce.data);
agg_share = calloc(1, sizeof(secp256k1_frost_share));
size = (*penv)->GetArrayLength(penv, jagg_share);
CHECKRESULT1(size != sizeof(secp256k1_frost_share), "invalid agg_share size", free_shares(shares, count));
CHECKRESULT(size != sizeof(secp256k1_frost_share), "invalid agg_share size");
in32 = (*penv)->GetByteArrayElements(penv, jagg_share, 0);
result = secp256k1_frost_share_parse(ctx, agg_share, (unsigned char *)in32);
result = secp256k1_frost_share_parse(ctx, &agg_share, (unsigned char *)in32);
(*penv)->ReleaseByteArrayElements(penv, jagg_share, in32, 0);
CHECKRESULT1(!result, "secp256k1_frost_share_parse failed", free_shares(shares, count));
CHECKRESULT(!result, "secp256k1_frost_share_parse failed");
CHECKRESULT((*penv)->GetArrayLength(penv, jsession) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, "invalid session size");
copy_bytes_from_java(penv, jsession, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, session.data);

2
jni/src/main/java/fr/acinq/secp256k1/Secp256k1CFunctions.java
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@@ -134,7 +134,7 @@ public class Secp256k1CFunctions {
* [1] vss_commitment: pointer to the VSS commitment
* [2] pok64: pointer to the proof of knowledge
*/
public static native byte[][][] secp256k1_frost_shares_gen(long ctx, byte[] seed32, int threshold, int total_signers, byte[][] ids33);
public static native byte[][][] secp256k1_frost_shares_gen(long ctx, byte[] pok64, byte[] seed32, int threshold, int total_signers, byte[][] ids33);
/**
* Aggregates shares

5
jni/src/main/kotlin/fr/acinq/secp256k1/NativeSecp256k1.kt
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@@ -135,8 +135,11 @@ public object NativeSecp256k1 : Secp256k1 {
totalSigners: Int,
ids33: Array<ByteArray>
): Triple<Array<ByteArray>, Array<ByteArray>, ByteArray> {
val pok64 = ByteArray(64)
val result = Secp256k1CFunctions.secp256k1_frost_shares_gen(
Secp256k1Context.getContext(),
pok64,
seed32,
threshold,
totalSigners,
@@ -146,7 +149,7 @@ public object NativeSecp256k1 : Secp256k1 {
return Triple(
result[0],
result[1],
result[2].first() // This is bad code...
pok64
)
}