Add qemu 2.4.0

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

diff --git a/qemu/roms/ipxe/src/crypto/privkey.c b/qemu/roms/ipxe/src/crypto/privkey.c
new file mode 100644 (file)
index 0000000..e010649
--- /dev/null
+++ b/qemu/roms/ipxe/src/crypto/privkey.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2012 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 <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ipxe/dhcp.h>
+#include <ipxe/settings.h>
+#include <ipxe/x509.h>
+#include <ipxe/privkey.h>
+
+/** @file
+ *
+ * Private key
+ *
+ * Life would in theory be easier if we could use a single file to
+ * hold both the certificate and corresponding private key.
+ * Unfortunately, the only common format which supports this is
+ * PKCS#12 (aka PFX), which is too ugly to be allowed anywhere near my
+ * codebase.  See, for reference and amusement:
+ *
+ *    http://www.cs.auckland.ac.nz/~pgut001/pubs/pfx.html
+ */
+
+/* Allow private key to be overridden if not explicitly specified */
+#ifdef PRIVATE_KEY
+#define ALLOW_KEY_OVERRIDE 0
+#else
+#define ALLOW_KEY_OVERRIDE 1
+#endif
+
+/* Raw private key data */
+extern char private_key_data[];
+extern char private_key_len[];
+__asm__ ( ".section \".rodata\", \"a\", @progbits\n\t"
+         "\nprivate_key_data:\n\t"
+#ifdef PRIVATE_KEY
+         ".incbin \"" PRIVATE_KEY "\"\n\t"
+#endif /* PRIVATE_KEY */
+         ".size private_key_data, ( . - private_key_data )\n\t"
+         ".equ private_key_len, ( . - private_key_data )\n\t"
+         ".previous\n\t" );
+
+/** Private key */
+struct asn1_cursor private_key = {
+       .data = private_key_data,
+       .len = ( ( size_t ) private_key_len ),
+};
+
+/** Private key setting */
+static struct setting privkey_setting __setting ( SETTING_CRYPTO, privkey ) = {
+       .name = "privkey",
+       .description = "Private key",
+       .tag = DHCP_EB_KEY,
+       .type = &setting_type_hex,
+};
+
+/**
+ * Apply private key configuration settings
+ *
+ * @ret rc             Return status code
+ */
+static int privkey_apply_settings ( void ) {
+       static void *key_data = NULL;
+       int len;
+
+       /* Allow private key to be overridden only if not explicitly
+        * specified at build time.
+        */
+       if ( ALLOW_KEY_OVERRIDE ) {
+
+               /* Restore default private key */
+               private_key.data = private_key_data;
+               private_key.len = ( ( size_t ) private_key_len );
+
+               /* Fetch new private key, if any */
+               free ( key_data );
+               if ( ( len = fetch_raw_setting_copy ( NULL, &privkey_setting,
+                                                     &key_data ) ) >= 0 ) {
+                       private_key.data = key_data;
+                       private_key.len = len;
+               }
+       }
+
+       /* Debug */
+       if ( private_key.len ) {
+               DBGC ( &private_key, "PRIVKEY using %s private key:\n",
+                      ( key_data ? "external" : "built-in" ) );
+               DBGC_HDA ( &private_key, 0, private_key.data, private_key.len );
+       } else {
+               DBGC ( &private_key, "PRIVKEY has no private key\n" );
+       }
+
+       return 0;
+}
+
+/** Private key settings applicator */
+struct settings_applicator privkey_applicator __settings_applicator = {
+       .apply = privkey_apply_settings,
+};