1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/auth/tbbr/tbbr_cot_common.c b/drivers/auth/tbbr/tbbr_cot_common.c
new file mode 100644
index 0000000..8c37248
--- /dev/null
+++ b/drivers/auth/tbbr/tbbr_cot_common.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2015-2023, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stddef.h>
+
+#include <mbedtls/version.h>
+
+#include <drivers/auth/auth_mod.h>
+#include <drivers/auth/tbbr_cot_common.h>
+
+#if USE_TBBR_DEFS
+#include <tools_share/tbbr_oid.h>
+#else
+#include <platform_oid.h>
+#endif
+
+#include <platform_def.h>
+/*
+ * The platform must allocate buffers to store the authentication parameters
+ * extracted from the certificates. In this case, because of the way the CoT is
+ * established, we can reuse some of the buffers on different stages
+ */
+
+static unsigned char fw_config_hash_buf[HASH_DER_LEN];
+static unsigned char tb_fw_config_hash_buf[HASH_DER_LEN];
+static unsigned char hw_config_hash_buf[HASH_DER_LEN];
+unsigned char tb_fw_hash_buf[HASH_DER_LEN];
+unsigned char scp_fw_hash_buf[HASH_DER_LEN];
+unsigned char nt_world_bl_hash_buf[HASH_DER_LEN];
+
+/*
+ * common Parameter type descriptors across BL1 and BL2
+ */
+auth_param_type_desc_t trusted_nv_ctr = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_NV_CTR, TRUSTED_FW_NVCOUNTER_OID);
+auth_param_type_desc_t subject_pk = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_PUB_KEY, 0);
+auth_param_type_desc_t sig = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_SIG, 0);
+auth_param_type_desc_t sig_alg = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_SIG_ALG, 0);
+auth_param_type_desc_t raw_data = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_RAW_DATA, 0);
+
+/* common hash used across BL1 and BL2 */
+auth_param_type_desc_t tb_fw_hash = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_HASH, TRUSTED_BOOT_FW_HASH_OID);
+auth_param_type_desc_t tb_fw_config_hash = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_HASH, TRUSTED_BOOT_FW_CONFIG_HASH_OID);
+auth_param_type_desc_t fw_config_hash = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_HASH, FW_CONFIG_HASH_OID);
+static auth_param_type_desc_t hw_config_hash = AUTH_PARAM_TYPE_DESC(
+	AUTH_PARAM_HASH, HW_CONFIG_HASH_OID);
+
+/* trusted_boot_fw_cert */
+const auth_img_desc_t trusted_boot_fw_cert = {
+	.img_id = TRUSTED_BOOT_FW_CERT_ID,
+	.img_type = IMG_CERT,
+	.parent = NULL,
+	.img_auth_methods = (const auth_method_desc_t[AUTH_METHOD_NUM]) {
+		[0] = {
+			.type = AUTH_METHOD_SIG,
+			.param.sig = {
+				.pk = &subject_pk,
+				.sig = &sig,
+				.alg = &sig_alg,
+				.data = &raw_data
+			}
+		},
+		[1] = {
+			.type = AUTH_METHOD_NV_CTR,
+			.param.nv_ctr = {
+				.cert_nv_ctr = &trusted_nv_ctr,
+				.plat_nv_ctr = &trusted_nv_ctr
+			}
+		}
+	},
+	.authenticated_data = (const auth_param_desc_t[COT_MAX_VERIFIED_PARAMS]) {
+		[0] = {
+			.type_desc = &tb_fw_hash,
+			.data = {
+				.ptr = (void *)tb_fw_hash_buf,
+				.len = (unsigned int)HASH_DER_LEN
+			}
+		},
+		[1] = {
+			.type_desc = &tb_fw_config_hash,
+			.data = {
+				.ptr = (void *)tb_fw_config_hash_buf,
+				.len = (unsigned int)HASH_DER_LEN
+			}
+		},
+		[2] = {
+			.type_desc = &hw_config_hash,
+			.data = {
+				.ptr = (void *)hw_config_hash_buf,
+				.len = (unsigned int)HASH_DER_LEN
+			}
+		},
+		[3] = {
+			.type_desc = &fw_config_hash,
+			.data = {
+				.ptr = (void *)fw_config_hash_buf,
+				.len = (unsigned int)HASH_DER_LEN
+			}
+		}
+	}
+};
+
+/* HW Config */
+const auth_img_desc_t hw_config = {
+	.img_id = HW_CONFIG_ID,
+	.img_type = IMG_RAW,
+	.parent = &trusted_boot_fw_cert,
+	.img_auth_methods = (const auth_method_desc_t[AUTH_METHOD_NUM]) {
+		[0] = {
+			.type = AUTH_METHOD_HASH,
+			.param.hash = {
+				.data = &raw_data,
+				.hash = &hw_config_hash
+			}
+		}
+	}
+};