commit ce4112538c5d5710ab24063f033847ee77332b61
author Manuel Pégourié-Gonnard <mpg@elzevir.fr> Wed Sep 04 12:28:37 2013 +0200
committer Manuel Pégourié-Gonnard <mpg@elzevir.fr> Wed Sep 04 12:29:26 2013 +0200
tree 61bbb370434451a45fd02f6fab93797fbe11c7a1
parent 83f3fc0d772d1137b225a9c9bacec084177f2e70

Fix RC4 key length in cipher

library/cipher_wrap.c

diff --git a/library/cipher_wrap.c b/library/cipher_wrap.c
index 79daaf9..f09823a 100644
--- a/library/cipher_wrap.c
+++ b/library/cipher_wrap.c
@@ -786,7 +786,11 @@
 static int arc4_setkey_wrap( void *ctx, const unsigned char *key,
                              unsigned int key_length )
 {
-    arc4_setup( (arc4_context *) ctx, key, key_length );
+    /* we get key_length in bits, arc4 expects it in bytes */
+    if( key_length % 8 != 0)
+        return( POLARSSL_ERR_CIPHER_BAD_INPUT_DATA );
+
+    arc4_setup( (arc4_context *) ctx, key, key_length / 8 );
     return( 0 );
 }