enc: fix coverity 1451499, 1451501, 1451506, 1451507, 1351511, 1451514, 1451517,...

[openssl.git] / crypto / idea / i_cfb64.c

diff --git a/crypto/idea/i_cfb64.c b/crypto/idea/i_cfb64.c
index b9db1639cf363512356e9dbf9c875c40fd6584dc..a477799edf6acfd04f99afede6fccef29dd76a03 100644 (file)
--- a/crypto/idea/i_cfb64.c
+++ b/crypto/idea/i_cfb64.c
@@ -33,6 +33,11 @@ void IDEA_cfb64_encrypt(const unsigned char *in, unsigned char *out,
     unsigned long ti[2];
     unsigned char *iv, c, cc;
 
+    if (n < 0) {
+        *num = -1;
+        return;
+    }
+
     iv = (unsigned char *)ivec;
     if (encrypt) {
         while (l--) {