From dce424ec85723fa7467623d6f7d73992043cd854 Mon Sep 17 00:00:00 2001
From: Moinak Ghosh <moinakg@gmail.com>
Date: Mon, 4 Mar 2013 22:35:33 +0530
Subject: [PATCH] Use 128-bit key length when decompressing older version
 archives.

---
 crypto/crypto_utils.h | 5 +++--
 main.c                | 2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/crypto/crypto_utils.h b/crypto/crypto_utils.h
index 409df79..54d98c1 100644
--- a/crypto/crypto_utils.h
+++ b/crypto/crypto_utils.h
@@ -47,8 +47,9 @@ extern "C" {
 #define	MAX_KEYLEN DEFAULT_KEYLEN
 #endif
 
-#define ENCRYPT_FLAG		1
-#define DECRYPT_FLAG		0
+#define	OLD_KEYLEN		16
+#define	ENCRYPT_FLAG		1
+#define	DECRYPT_FLAG		0
 #define	CRYPTO_ALG_AES		0x10
 #define	CRYPTO_ALG_SALSA20	0x20
 #define	MAX_SALTLEN		64
diff --git a/main.c b/main.c
index 1e597f8..eacde6f 100644
--- a/main.c
+++ b/main.c
@@ -818,6 +818,8 @@ start_decompress(const char *filename, const char *to_filename)
 		pw_len = -1;
 		compressed_chunksize += mac_bytes;
 		encrypt_type = flags & MASK_CRYPTO_ALG;
+		if (version < 7)
+			keylen = OLD_KEYLEN;
 
 		if (encrypt_type == CRYPTO_ALG_AES) {
 			noncelen = 8;