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* Tunnel encryption: More efficient XOR

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zzz
2011-11-23 22:25:36 +00:00
parent 5a934050d4
commit f69f06b038
2 changed files with 8 additions and 2 deletions
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5
router/java/src/net/i2p/router/tunnel/HopProcessor.java
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@@ -100,7 +100,10 @@ class HopProcessor {
private final void encrypt(byte data[], int offset, int length) { private final void encrypt(byte data[], int offset, int length) {
for (int off = offset + IV_LENGTH; off < length; off += IV_LENGTH) { for (int off = offset + IV_LENGTH; off < length; off += IV_LENGTH) {
DataHelper.xor(data, off - IV_LENGTH, data, off, data, off, IV_LENGTH); //DataHelper.xor(data, off - IV_LENGTH, data, off, data, off, IV_LENGTH);
for (int j = 0; j < IV_LENGTH; j++) {
data[off + j] ^= data[(off - IV_LENGTH) + j];
}
_context.aes().encryptBlock(data, off, _config.getLayerKey(), data, off); _context.aes().encryptBlock(data, off, _config.getLayerKey(), data, off);
} }
} }

5
router/java/src/net/i2p/router/tunnel/OutboundGatewayProcessor.java
View File

@@ -93,7 +93,10 @@ class OutboundGatewayProcessor {
System.arraycopy(orig, off, cur, 0, HopProcessor.IV_LENGTH); System.arraycopy(orig, off, cur, 0, HopProcessor.IV_LENGTH);
ctx.aes().decryptBlock(orig, off, config.getLayerKey(), orig, off); ctx.aes().decryptBlock(orig, off, config.getLayerKey(), orig, off);
DataHelper.xor(prev, 0, orig, off, orig, off, HopProcessor.IV_LENGTH); //DataHelper.xor(prev, 0, orig, off, orig, off, HopProcessor.IV_LENGTH);
for (int j = 0; j < HopProcessor.IV_LENGTH; j++) {
orig[off + j] ^= prev[j];
}
byte xf[] = prev; byte xf[] = prev;
prev = cur; prev = cur;
cur = xf; cur = xf;