commit ba1ba11a984703cd0fa8ec061254ac6147f8a93d
author Hanno Becker <hanno.becker@arm.com> Fri Sep 29 11:48:23 2017 +0100
committer Hanno Becker <hanno.becker@arm.com> Fri Sep 29 11:54:05 2017 +0100
tree 819e14bd3630c0b5aa5eedd834c599a5d587a363
parent 2f8f06aa25e9d5ee4fc9fe217543c872b39e4d05

Check that length is properly set in `mbedtls_rsa_check_pubkey`

library/rsa.c

diff --git a/library/rsa.c b/library/rsa.c
index 8623011..ae4382b 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -1028,6 +1028,9 @@
     if( !ctx->N.p || !ctx->E.p )
         return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
 
+    if( ctx->len != mbedtls_mpi_size( &ctx->N ) )
+        return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
+
     if( ( ctx->N.p[0] & 1 ) == 0 ||
         ( ctx->E.p[0] & 1 ) == 0 )
         return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );