From 4c87a1868835d05f1cadae7b8ad6a7c95d9d9c0e Mon Sep 17 00:00:00 2001
From: Ross Philipson <philipsonr@ainfosec.com>
Date: Tue, 14 Mar 2017 15:40:33 -0400
Subject: Initial commit of EFI TBOOT work from internal project.

Signed-off-by: Ross Philipson <philipsonr@ainfosec.com>
---
 tboot/include/lcp3_hlp.h | 117 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 tboot/include/lcp3_hlp.h

(limited to 'tboot/include/lcp3_hlp.h')

diff --git a/tboot/include/lcp3_hlp.h b/tboot/include/lcp3_hlp.h
new file mode 100644
index 0000000..92061e4
--- /dev/null
+++ b/tboot/include/lcp3_hlp.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2014 Intel Corporation. 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 Intel Corporation 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 OWNER 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 __TXT_LCP2_HELPER_H__
+#define __TXT_LCP2_HELPER_H__
+
+static inline lcp_signature_t *get_tpm12_signature(const lcp_policy_list_t *pollist)
+{
+    if ( pollist == NULL )
+        return NULL;
+
+    if ( pollist->sig_alg != LCP_POLSALG_RSA_PKCS_15 )
+        return NULL;
+
+    return (lcp_signature_t *)((const void *)&pollist->policy_elements +
+                               pollist->policy_elements_size);
+}
+
+static inline size_t get_tpm12_signature_size(const lcp_signature_t *sig)
+{
+    if ( sig == NULL )
+        return 0;
+
+    return offsetof(lcp_signature_t, pubkey_value) + 2*sig->pubkey_size;
+}
+
+static inline size_t get_tpm12_policy_list_size(const lcp_policy_list_t *pollist)
+{
+    size_t size = 0;
+
+    if ( pollist == NULL )
+        return 0;
+
+    size = offsetof(lcp_policy_list_t, policy_elements) +
+           pollist->policy_elements_size;
+
+    /* add sig size */
+    if ( pollist->sig_alg == LCP_POLSALG_RSA_PKCS_15 )
+        size += get_tpm12_signature_size(get_tpm12_signature(pollist));
+
+    return size;
+}
+
+static inline lcp_signature_t2 *get_tpm20_signature(const lcp_policy_list_t2 *pollist)
+{
+    if ( pollist == NULL || pollist->sig_alg == TPM_ALG_NULL )
+        return NULL;
+
+    return (lcp_signature_t2 *)((const void *)&pollist->policy_elements +
+                               pollist->policy_elements_size);
+}
+
+static inline size_t get_tpm20_signature_size(const lcp_signature_t2 *sig,
+                                              const uint16_t sig_alg)
+{
+    if ( sig == NULL )
+         return 0;
+
+    if ( sig_alg == TPM_ALG_RSASSA)
+         return offsetof(lcp_rsa_signature_t, pubkey_value) +
+                        2*sig->rsa_signature.pubkey_size;
+    else if ( sig_alg == TPM_ALG_ECDSA)
+        return offsetof(lcp_ecc_signature_t, qx) +
+                        2*sig->ecc_signature.pubkey_size;
+
+    return 0;
+}
+
+static inline size_t get_tpm20_policy_list_size(const lcp_policy_list_t2 *pollist)
+{
+    size_t size = 0;
+
+    if ( pollist == NULL )
+        return 0;
+
+    size = offsetof(lcp_policy_list_t2, policy_elements) +
+           pollist->policy_elements_size;
+
+    /* add sig size */
+    if ( pollist->sig_alg == TPM_ALG_RSASSA ||
+         pollist->sig_alg == TPM_ALG_ECDSA ||
+         pollist->sig_alg == TPM_ALG_SM2 )
+        size += get_tpm20_signature_size(get_tpm20_signature(pollist),
+                        pollist->sig_alg);
+
+    return size;
+}
+
+
+#endif    /*  __TXT_LCP3_HELPER_H__ */
-- 
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