TBB: add tool to generate certificates
This patch adds a tool that generates all the necessary elements
to establish the chain of trust (CoT) between the images.
The tool reads the binary images and signing keys and outputs the
corresponding certificates that will be used by the target at run
time to verify the authenticity of the images.
Note: the platform port must provide the file platform_oid.h. This
file will define the OIDs of the x509 extensions that will be added
to the certificates in order to establish the CoT.
Change-Id: I2734d6808b964a2107ab3a4805110698066a04be
diff --git a/tools/cert_create/include/ext.h b/tools/cert_create/include/ext.h
new file mode 100644
index 0000000..d73f573
--- /dev/null
+++ b/tools/cert_create/include/ext.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef EXT_H_
+#define EXT_H_
+
+#include <openssl/x509v3.h>
+
+/*
+ * This structure contains the relevant information to create the extensions
+ * to be included in the certificates. This extensions will be used to
+ * establish the chain of trust.
+ */
+typedef struct ext_s {
+ const char *oid; /* OID of the extension */
+ const char *sn; /* Short name */
+ const char *ln; /* Long description */
+ int type; /* OpenSSL ASN1 type of the extension data.
+ * Supported types are:
+ * - V_ASN1_INTEGER
+ * - V_ASN1_OCTET_STRING
+ */
+ int alias; /* In case OpenSSL provides an standard
+ * extension of the same type, add the new
+ * extension as an alias of this one
+ */
+
+ X509V3_EXT_METHOD method; /* This field may be used to define a custom
+ * function to print the contents of the
+ * extension */
+} ext_t;
+
+enum {
+ EXT_NON_CRIT = 0,
+ EXT_CRIT = !EXT_NON_CRIT,
+};
+
+int ext_init(ext_t *tbb_ext);
+X509_EXTENSION *ext_new_hash(int nid, int crit, unsigned char *buf, size_t len);
+X509_EXTENSION *ext_new_nvcounter(int nid, int crit, int value);
+X509_EXTENSION *ext_new_key(int nid, int crit, EVP_PKEY *k);
+
+#endif /* EXT_H_ */