Security-59754.41.1.tar.gz

[apple/security.git] / OSX / libsecurity_apple_csp / lib / BlockCryptor.cpp

diff --git a/OSX/libsecurity_apple_csp/lib/BlockCryptor.cpp b/OSX/libsecurity_apple_csp/lib/BlockCryptor.cpp
index 72e5e058daa5b70e7c40d593b95ca2b54bd24fa7..feed16618f34bff8293bc58772f4a6b0eae14294 100644 (file)
--- a/OSX/libsecurity_apple_csp/lib/BlockCryptor.cpp
+++ b/OSX/libsecurity_apple_csp/lib/BlockCryptor.cpp
@@ -317,7 +317,7 @@ void BlockCryptor::update(
        /* 
         * en/decrypt even blocks in (remaining) inp.  
         */
-       size_t leftOver = uInSize % mInBlockSize;
+    size_t leftOver = (mInBlockSize > 0) ? uInSize % mInBlockSize : 0;
        if((leftOver == 0) && needLeftOver) {
                /* 
                 * Even blocks coming in, but we really need to leave some data
@@ -327,7 +327,7 @@ void BlockCryptor::update(
                leftOver = mInBlockSize; 
        }
        toMove = uInSize - leftOver;
-       size_t blocks = toMove / mInBlockSize;
+    size_t blocks = (mInBlockSize > 0) ? toMove / mInBlockSize : 0;
        if(mMultiBlockCapable && !doCbc && (blocks != 0)) {
                /* 
                 * Optimization for algorithms that are multi-block capable and that