Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / crypto / rootcert.c

diff --git a/qemu/roms/ipxe/src/crypto/rootcert.c b/qemu/roms/ipxe/src/crypto/rootcert.c
new file mode 100644 (file)
index 0000000..ae28905
--- /dev/null
+++ b/qemu/roms/ipxe/src/crypto/rootcert.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdlib.h>
+#include <ipxe/crypto.h>
+#include <ipxe/sha256.h>
+#include <ipxe/x509.h>
+#include <ipxe/settings.h>
+#include <ipxe/dhcp.h>
+#include <ipxe/init.h>
+#include <ipxe/rootcert.h>
+
+/** @file
+ *
+ * Root certificate store
+ *
+ */
+
+/** Length of a root certificate fingerprint */
+#define FINGERPRINT_LEN SHA256_DIGEST_SIZE
+
+/* Allow trusted certificates to be overridden if not explicitly specified */
+#ifdef TRUSTED
+#define ALLOW_TRUST_OVERRIDE 0
+#else
+#define ALLOW_TRUST_OVERRIDE 1
+#endif
+
+/* Use iPXE root CA if no trusted certificates are explicitly specified */
+#ifndef TRUSTED
+#define TRUSTED                                                                \
+       /* iPXE root CA */                                              \
+       0x9f, 0xaf, 0x71, 0x7b, 0x7f, 0x8c, 0xa2, 0xf9, 0x3c, 0x25,     \
+       0x6c, 0x79, 0xf8, 0xac, 0x55, 0x91, 0x89, 0x5d, 0x66, 0xd1,     \
+       0xff, 0x3b, 0xee, 0x63, 0x97, 0xa7, 0x0d, 0x29, 0xc6, 0x5e,     \
+       0xed, 0x1a,
+#endif
+
+/** Root certificate fingerprints */
+static const uint8_t fingerprints[] = { TRUSTED };
+
+/** Root certificate fingerprint setting */
+static struct setting trust_setting __setting ( SETTING_CRYPTO, trust ) = {
+       .name = "trust",
+       .description = "Trusted root certificate fingerprints",
+       .tag = DHCP_EB_TRUST,
+       .type = &setting_type_hex,
+};
+
+/** Root certificates */
+struct x509_root root_certificates = {
+       .digest = &sha256_algorithm,
+       .count = ( sizeof ( fingerprints ) / FINGERPRINT_LEN ),
+       .fingerprints = fingerprints,
+};
+
+/**
+ * Initialise root certificate
+ *
+ * The list of trusted root certificates can be specified at build
+ * time using the TRUST= build parameter.  If no certificates are
+ * specified, then the default iPXE root CA certificate is trusted.
+ *
+ * If no certificates were explicitly specified, then we allow the
+ * list of trusted root certificate fingerprints to be overridden
+ * using the "trust" setting, but only at the point of iPXE
+ * initialisation.  This prevents untrusted sources of settings
+ * (e.g. DHCP) from subverting the chain of trust, while allowing
+ * trustworthy sources (e.g. VMware GuestInfo or non-volatile stored
+ * options) to specify the trusted root certificate without requiring
+ * a rebuild.
+ */
+static void rootcert_init ( void ) {
+       void *external = NULL;
+       int len;
+
+       /* Allow trusted root certificates to be overridden only if
+        * not explicitly specified at build time.
+        */
+       if ( ALLOW_TRUST_OVERRIDE ) {
+
+               /* Fetch copy of "trust" setting, if it exists.  This
+                * memory will never be freed.
+                */
+               if ( ( len = fetch_raw_setting_copy ( NULL, &trust_setting,
+                                                     &external ) ) >= 0 ) {
+                       root_certificates.fingerprints = external;
+                       root_certificates.count = ( len / FINGERPRINT_LEN );
+               }
+       }
+
+       DBGC ( &root_certificates, "ROOTCERT using %d %s certificate(s):\n",
+              root_certificates.count, ( external ? "external" : "built-in" ));
+       DBGC_HDA ( &root_certificates, 0, root_certificates.fingerprints,
+                  ( root_certificates.count * FINGERPRINT_LEN ) );
+}
+
+/** Root certificate initialiser */
+struct init_fn rootcert_init_fn __init_fn ( INIT_LATE ) = {
+       .initialise = rootcert_init,
+};