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cebe1f238f
Firmware Update requires an X509v3 certificate which contains hashes for SCP_BL2U, BL2U and NS_BL2U images as extensions. This patch extends the Chain of Trust definition in the 'cert_create' tool to include the Firmware Update certificate and the required extensions (including command line options). A new field in the extension structure will be used to indicate that the extension is optional. In the case of an image hash extension, this field will tell the tool that the hash should be included in the certificate, but filled with zeros. Change-Id: I1f77a66b018826b71745910771f38d9cf6050388
102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
/*
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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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