Move from SHA-1 to SHA-256 as default in programs
diff --git a/programs/pkey/dh_server.c b/programs/pkey/dh_server.c
index b7e6482..f37a2b8 100644
--- a/programs/pkey/dh_server.c
+++ b/programs/pkey/dh_server.c
@@ -48,7 +48,7 @@
 
 #if !defined(POLARSSL_AES_C) || !defined(POLARSSL_DHM_C) ||     \
     !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_NET_C) ||  \
-    !defined(POLARSSL_RSA_C) || !defined(POLARSSL_SHA1_C) ||    \
+    !defined(POLARSSL_RSA_C) || !defined(POLARSSL_SHA256_C) ||    \
     !defined(POLARSSL_FS_IO) || !defined(POLARSSL_CTR_DRBG_C)
 int main( int argc, char *argv[] )
 {
@@ -57,7 +57,7 @@
 
     polarssl_printf("POLARSSL_AES_C and/or POLARSSL_DHM_C and/or POLARSSL_ENTROPY_C "
            "and/or POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
-           "POLARSSL_SHA1_C and/or POLARSSL_FS_IO and/or "
+           "POLARSSL_SHA256_C and/or POLARSSL_FS_IO and/or "
            "POLARSSL_CTR_DBRG_C not defined.\n");
     return( 0 );
 }
@@ -201,7 +201,7 @@
     buf[n    ] = (unsigned char)( rsa.len >> 8 );
     buf[n + 1] = (unsigned char)( rsa.len      );
 
-    if( ( ret = rsa_pkcs1_sign( &rsa, NULL, NULL, RSA_PRIVATE, POLARSSL_MD_SHA1,
+    if( ( ret = rsa_pkcs1_sign( &rsa, NULL, NULL, RSA_PRIVATE, POLARSSL_MD_SHA256,
                                 0, hash, buf + n + 2 ) ) != 0 )
     {
         polarssl_printf( " failed\n  ! rsa_pkcs1_sign returned %d\n\n", ret );
@@ -298,5 +298,5 @@
     return( ret );
 }
 #endif /* POLARSSL_AES_C && POLARSSL_DHM_C && POLARSSL_ENTROPY_C &&
-          POLARSSL_NET_C && POLARSSL_RSA_C && POLARSSL_SHA1_C &&
+          POLARSSL_NET_C && POLARSSL_RSA_C && POLARSSL_SHA256_C &&
           POLARSSL_FS_IO && POLARSSL_CTR_DRBG_C */