Util: Fix decompression of compressed zero bytes (ticket #2770)

2020-09-02 15:57:04 +00:00
parent 4863ab3711
commit ceb0749e0d
1 changed files with 2 additions and 1 deletions
--- a/core/java/src/net/i2p/data/DataHelper.java
+++ b/core/java/src/net/i2p/data/DataHelper.java
@ -1902,7 +1902,8 @@ public class DataHelper {
     */
    public static byte[] decompress(byte orig[], int offset, int length) throws IOException {
        if (orig == null) return orig;
-        if (length < 23)
+        // normal overhead is 23 bytes, but a compress of zero bytes is 20 bytes
+        if (length < 20)
            throw new IOException("length");
        if (length < 65559 && orig[offset + 10] == 0x01)
            return zeroDecompress(orig, offset, length);