commit fb84d38b451f6a9bf50b524496623740d70e5f1b
author Manuel Pégourié-Gonnard <mpg2@elzevir.fr> Fri Oct 30 10:56:25 2015 +0100
committer Manuel Pégourié-Gonnard <mpg2@elzevir.fr> Fri Oct 30 10:56:25 2015 +0100
tree ae622d33b30304a8ffb00865f38ade4c81944d92
parent f7a46882574804d1939d48341ecc8b87e3efd651

Try to prevent some misuse of RSA functions

fixes #331

library/rsa.c

diff --git a/library/rsa.c b/library/rsa.c
index 3883d09..1f907b7 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -359,6 +359,10 @@
     size_t olen;
     mbedtls_mpi T, T1, T2;
 
+    /* Make sure we have private key info, prevent possible misuse */
+    if( ctx->P.p == NULL || ctx->Q.p == NULL || ctx->D.p == NULL )
+        return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
+
     mbedtls_mpi_init( &T ); mbedtls_mpi_init( &T1 ); mbedtls_mpi_init( &T2 );
 
 #if defined(MBEDTLS_THREADING_C)