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Final crypto changes for BTPv2. #111

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Use BLAKE2s to generate tags.
KDF arguments for key rotation.
Frame IV format.
This commit is contained in:
akwizgran
2016-01-01 14:53:54 +00:00
parent 19bfe71f18
commit 6a4aea77fb
7 changed files with 103 additions and 70 deletions
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13
briar-core/src/org/briarproject/util/ByteUtils.java
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@@ -37,6 +37,19 @@ public class ByteUtils {
b[offset + 3] = (byte) (i & 0xFF);
}
public static void writeUint64(long i, byte[] b, int offset) {
if (i < 0) throw new IllegalArgumentException();
if (b.length < offset + 8) throw new IllegalArgumentException();
b[offset] = (byte) (i >> 56);
b[offset + 1] = (byte) (i >> 48 & 0xFF);
b[offset + 2] = (byte) (i >> 40 & 0xFF);
b[offset + 3] = (byte) (i >> 32 & 0xFF);
b[offset + 4] = (byte) (i >> 24 & 0xFF);
b[offset + 5] = (byte) (i >> 16 & 0xFF);
b[offset + 6] = (byte) (i >> 8 & 0xFF);
b[offset + 7] = (byte) (i & 0xFF);
}
public static int readUint16(byte[] b, int offset) {
if (b.length < offset + 2) throw new IllegalArgumentException();
return ((b[offset] & 0xFF) << 8) | (b[offset + 1] & 0xFF);