Open-source multiplayer game server compatible with the RuneScape client https://www.openrs2.org/
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package org.openrs2.crypto
import io.netty.buffer.ByteBuf
import io.netty.buffer.ByteBufUtil
import java.security.MessageDigest
public fun ByteBuf.sha1(): ByteArray {
return sha1(readerIndex(), readableBytes())
}
public fun ByteBuf.sha1(index: Int, len: Int): ByteArray {
val digest = MessageDigest.getInstance("SHA-1")
if (hasArray()) {
digest.update(array(), arrayOffset() + index, len)
} else {
digest.update(ByteBufUtil.getBytes(this, index, len, false))
}
return digest.digest()
}