commit 7ddc2cdfce7322f73b97375ba67b6de7c0cb55ae
author Janos Follath <janos.follath@arm.com> Fri Mar 18 11:45:44 2016 +0000
committer Simon Butcher <simon.butcher@arm.com> Tue Apr 19 10:28:24 2016 +0100
tree 657d3dca53cef9176cbe857cbdbd077a87b396e6
parent e9f842782bf3e3240f56e3a286e8ef1ba2146595

Fix null pointer dereference in the RSA module.

Introduced null pointer checks in mbedtls_rsa_rsaes_pkcs1_v15_encrypt

library/rsa.c

diff --git a/library/rsa.c b/library/rsa.c
index d86fbc5..16114ac 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -586,7 +586,8 @@
     if( mode == RSA_PRIVATE && ctx->padding != RSA_PKCS_V15 )
         return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
 
-    if( f_rng == NULL )
+    // We don't check p_rng because it won't be dereferenced here
+    if( f_rng == NULL || input == NULL || output == NULL )
         return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
 
     olen = ctx->len;