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8297379: Enable the ByteBuffer path of Poly1305 optimizations

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Reviewed-by: sviswanathan, ascarpino, jnimeh
This commit is contained in:
Volodymyr Paprotski 2022-12-06 16:47:45 +00:00 • committed by Sandhya Viswanathan
parent 1e468320dc
commit 203251ffc0
3 changed files with 83 additions and 19 deletions
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29
src/java.base/share/classes/com/sun/crypto/provider/Poly1305.java
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@ -124,10 +124,10 @@ final class Poly1305 {
BLOCK_LENGTH - blockOffset);
if (bytesToWrite >= BLOCK_LENGTH) {
// If bytes to write == BLOCK_LENGTH, then we have no
// left-over data from previous updates and we can create
// the IntegerModuloP directly from the input buffer.
processBlock(buf, bytesToWrite);
// Have at least one full block in the buf, process all full blocks
int blockMultipleLength = remaining & (~(BLOCK_LENGTH-1));
processMultipleBlocks(buf, blockMultipleLength);
remaining -= blockMultipleLength;
} else {
// We have some left-over data from previous updates, so
// copy that into the holding block until we get a full block.
@ -138,9 +138,8 @@ final class Poly1305 {
processBlock(block, 0, BLOCK_LENGTH);
blockOffset = 0;
}
remaining -= bytesToWrite;
}
remaining -= bytesToWrite;
}
}
@ -255,6 +254,24 @@ final class Poly1305 {
}
}
private void processMultipleBlocks(ByteBuffer buf, int blockMultipleLength) {
if (buf.hasArray()) {
byte[] input = buf.array();
int offset = buf.arrayOffset() + buf.position();
long[] aLimbs = a.getLimbs();
long[] rLimbs = r.getLimbs();
processMultipleBlocksCheck(input, offset, blockMultipleLength, aLimbs, rLimbs);
processMultipleBlocks(input, offset, blockMultipleLength, aLimbs, rLimbs);
buf.position(offset + blockMultipleLength);
} else {
while (blockMultipleLength >= BLOCK_LENGTH) {
processBlock(buf, BLOCK_LENGTH);
blockMultipleLength -= BLOCK_LENGTH;
}
}
}
private static void processMultipleBlocksCheck(byte[] input, int offset, int length, long[] aLimbs, long[] rLimbs) {
Objects.checkFromIndexSize(offset, length, input.length);
final int numLimbs = 5; // Intrinsic expects exactly 5 limbs