Properly handle a partial block in OCB mode

[oweals/openssl.git] / crypto / evp / e_aes.c

diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index 0fb3c16e4e7dd2f913e034b6a63b3f6ac6677725..d3be6a086aaaefe872fd85af9feaaed9dc2f1514 100644 (file)
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -2587,6 +2587,8 @@ static int aes_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
             }
             written_len = AES_BLOCK_SIZE;
             *buf_len = 0;
+            if (out != NULL)
+                out += AES_BLOCK_SIZE;
         }
 
         /* Do we have a partial block to handle at the end? */