2 * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
29 #include <ipxe/dhcp.h>
30 #include <ipxe/settings.h>
31 #include <ipxe/x509.h>
32 #include <ipxe/privkey.h>
38 * Life would in theory be easier if we could use a single file to
39 * hold both the certificate and corresponding private key.
40 * Unfortunately, the only common format which supports this is
41 * PKCS#12 (aka PFX), which is too ugly to be allowed anywhere near my
42 * codebase. See, for reference and amusement:
44 * http://www.cs.auckland.ac.nz/~pgut001/pubs/pfx.html
47 /* Allow private key to be overridden if not explicitly specified */
49 #define ALLOW_KEY_OVERRIDE 0
51 #define ALLOW_KEY_OVERRIDE 1
54 /* Raw private key data */
55 extern char private_key_data[];
56 extern char private_key_len[];
57 __asm__ ( ".section \".rodata\", \"a\", @progbits\n\t"
58 "\nprivate_key_data:\n\t"
60 ".incbin \"" PRIVATE_KEY "\"\n\t"
61 #endif /* PRIVATE_KEY */
62 ".size private_key_data, ( . - private_key_data )\n\t"
63 ".equ private_key_len, ( . - private_key_data )\n\t"
67 struct asn1_cursor private_key = {
68 .data = private_key_data,
69 .len = ( ( size_t ) private_key_len ),
72 /** Private key setting */
73 static struct setting privkey_setting __setting ( SETTING_CRYPTO, privkey ) = {
75 .description = "Private key",
77 .type = &setting_type_hex,
81 * Apply private key configuration settings
83 * @ret rc Return status code
85 static int privkey_apply_settings ( void ) {
86 static void *key_data = NULL;
89 /* Allow private key to be overridden only if not explicitly
90 * specified at build time.
92 if ( ALLOW_KEY_OVERRIDE ) {
94 /* Restore default private key */
95 private_key.data = private_key_data;
96 private_key.len = ( ( size_t ) private_key_len );
98 /* Fetch new private key, if any */
100 if ( ( len = fetch_raw_setting_copy ( NULL, &privkey_setting,
101 &key_data ) ) >= 0 ) {
102 private_key.data = key_data;
103 private_key.len = len;
108 if ( private_key.len ) {
109 DBGC ( &private_key, "PRIVKEY using %s private key:\n",
110 ( key_data ? "external" : "built-in" ) );
111 DBGC_HDA ( &private_key, 0, private_key.data, private_key.len );
113 DBGC ( &private_key, "PRIVKEY has no private key\n" );
119 /** Private key settings applicator */
120 struct settings_applicator privkey_applicator __settings_applicator = {
121 .apply = privkey_apply_settings,