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Length prefix all KDF arguments.

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This commit is contained in:
akwizgran
2012-03-29 16:58:21 +01:00
parent 474fa3d523
commit d7581586fd
2 changed files with 32 additions and 33 deletions
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11
util/net/sf/briar/util/ByteUtils.java
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@@ -12,10 +12,17 @@ public class ByteUtils {
*/
public static final long MAX_32_BIT_UNSIGNED = 4294967295L; // 2^32 - 1
public static void writeUint8(int i, byte[] b, int offset) {
if(i < 0) throw new IllegalArgumentException();
if(i > 255) throw new IllegalArgumentException();
if(b.length < offset) throw new IllegalArgumentException();
b[offset] = (byte) i;
}
public static void writeUint16(int i, byte[] b, int offset) {
if(i < 0) throw new IllegalArgumentException();
if(i > MAX_16_BIT_UNSIGNED) throw new IllegalArgumentException();
assert b.length >= offset + 2;
if(b.length < offset + 2) throw new IllegalArgumentException();
b[offset] = (byte) (i >> 8);
b[offset + 1] = (byte) (i & 0xFF);
}
@@ -23,7 +30,7 @@ public class ByteUtils {
public static void writeUint32(long i, byte[] b, int offset) {
if(i < 0L) throw new IllegalArgumentException();
if(i > MAX_32_BIT_UNSIGNED) throw new IllegalArgumentException();
assert b.length >= offset + 4;
if(b.length < offset + 4) throw new IllegalArgumentException();
b[offset] = (byte) (i >> 24);
b[offset + 1] = (byte) (i >> 16 & 0xFF);
b[offset + 2] = (byte) (i >> 8 & 0xFF);