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101 lines
3.4 KiB
101 lines
3.4 KiB
/*
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* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef EXT_H_
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#define EXT_H_
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#include "key.h"
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#include <openssl/x509v3.h>
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/* Extension types supported */
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enum {
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EXT_TYPE_NVCOUNTER,
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EXT_TYPE_PKEY,
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EXT_TYPE_HASH
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};
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/*
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* This structure contains the relevant information to create the extensions
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* to be included in the certificates. This extensions will be used to
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* establish the chain of trust.
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*/
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typedef struct ext_s {
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const char *oid; /* OID of the extension */
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const char *sn; /* Short name */
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const char *ln; /* Long description */
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int asn1_type; /* OpenSSL ASN1 type of the extension data.
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* Supported types are:
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* - V_ASN1_INTEGER
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* - V_ASN1_OCTET_STRING
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*/
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int type;
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const char *opt; /* Command line option to specify data */
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/* Extension data (depends on extension type) */
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union {
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const char *fn; /* File with extension data */
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int nvcounter; /* Non volatile counter */
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int key; /* Public key */
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} data;
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int alias; /* In case OpenSSL provides an standard
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* extension of the same type, add the new
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* extension as an alias of this one
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*/
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X509V3_EXT_METHOD method; /* This field may be used to define a custom
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* function to print the contents of the
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* extension */
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int optional; /* This field may be used optionally to exclude an image */
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} ext_t;
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enum {
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EXT_NON_CRIT = 0,
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EXT_CRIT = !EXT_NON_CRIT,
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};
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/* Exported API */
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int ext_init(void);
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ext_t *ext_get_by_opt(const char *opt);
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X509_EXTENSION *ext_new_hash(int nid, int crit, const EVP_MD *md,
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unsigned char *buf, size_t len);
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X509_EXTENSION *ext_new_nvcounter(int nid, int crit, int value);
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X509_EXTENSION *ext_new_key(int nid, int crit, EVP_PKEY *k);
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/* Macro to register the extensions used in the CoT */
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#define REGISTER_EXTENSIONS(_ext) \
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ext_t *extensions = &_ext[0]; \
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const unsigned int num_extensions = sizeof(_ext)/sizeof(_ext[0]);
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/* Exported variables */
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extern ext_t *extensions;
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extern const unsigned int num_extensions;
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#endif /* EXT_H_ */
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