/*
* Class: nayuki_nativehash_Whirlpool
* Method: compress
* Signature: ([B[BII)Z
*/
JNIEXPORT jboolean JNICALL Java_nayuki_nativehash_Whirlpool_compress(JNIEnv *env, jclass thisClass, jbyteArray stateArray, jbyteArray msg, jint off, jint len) {
jboolean status = JNI_FALSE;
if (len < 0 || (len & 63) != 0) // Block size is 64 bytes
goto cleanup0;
JNIEnv theEnv = *env;
(void)thisClass;
// Get state array and convert to uint8_t
jbyte *stateJava = theEnv->GetByteArrayElements(env, stateArray, NULL);
if (stateJava == NULL)
goto cleanup0;
uint8_t state[STATE_LEN];
for (int i = 0; i < STATE_LEN; i++)
state[i] = (uint8_t)stateJava[i];
// Iterate over each block in msg
jbyte *block = theEnv->GetPrimitiveArrayCritical(env, msg, NULL);
if (block == NULL)
goto cleanup1;
for (jint end = off + len; off < end; off += 64)
whirlpool_compress_block(&block[off], state);
theEnv->ReleasePrimitiveArrayCritical(env, msg, block, JNI_ABORT);
// Convert state array to jbyte and clean up
for (int i = 0; i < STATE_LEN; i++)
stateJava[i] = (jbyte)state[i];
status = JNI_TRUE;
cleanup1:
theEnv->ReleaseByteArrayElements(env, stateArray, stateJava, 0);
cleanup0:
return status;
}
/*
* Class: nayuki_nativehash_Whirlpool
* Method: compress
* Signature: ([B[BII)Z
*/
JNIEXPORT jboolean JNICALL Java_nayuki_nativehash_Whirlpool_compress(JNIEnv *env, jclass thisClass, jbyteArray stateArray, jbyteArray msg, jint off, jint len) {
if (len < 0 || (len & 63) != 0) // Block size is 64 bytes
return 0;
JNIEnv theEnv = *env;
// Get state array and convert to uint8_t
jbyte *stateJava = theEnv->GetByteArrayElements(env, stateArray, NULL);
if (stateJava == NULL)
return 0;
unsigned int i;
uint8_t state[STATE_LEN];
for (i = 0; i < STATE_LEN; i++)
state[i] = (uint8_t)stateJava[i];
// Iterate over each block in msg
jbyte *block = theEnv->GetPrimitiveArrayCritical(env, msg, NULL);
if (block == NULL)
return 0;
size_t newoff;
size_t newlen = len;
for (newoff = 0; newoff < newlen; newoff += 64)
whirlpool_compress_block(block + off + newoff, state);
theEnv->ReleasePrimitiveArrayCritical(env, msg, block, JNI_ABORT);
// Convert state array to jbyte and clean up
for (i = 0; i < STATE_LEN; i++)
stateJava[i] = (jbyte)state[i];
theEnv->ReleaseByteArrayElements(env, stateArray, stateJava, 0);
return 1;
}
