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This patch modifies the Trusted Board Boot implementation to use the new authentication framework, making use of the authentication module, the cryto module and the image parser module to authenticate the images in the Chain of Trust. A new function 'load_auth_image()' has been implemented. When TBB is enabled, this function will call the authentication module to authenticate parent images following the CoT up to the root of trust to finally load and authenticate the requested image. The platform is responsible for picking up the right makefiles to build the corresponding cryptographic and image parser libraries. ARM platforms use the mbedTLS based libraries. The platform may also specify what key algorithm should be used to sign the certificates. This is done by declaring the 'KEY_ALG' variable in the platform makefile. FVP and Juno use ECDSA keys. On ARM platforms, BL2 and BL1-RW regions have been increased 4KB each to accommodate the ECDSA code. REMOVED BUILD OPTIONS: * 'AUTH_MOD' Change-Id: I47d436589fc213a39edf5f5297bbd955f15ae867pull/315/head
Juan Castillo
10 years ago
11 changed files with 142 additions and 475 deletions
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/*
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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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#include <assert.h> |
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#include <auth.h> |
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#include <debug.h> |
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/*
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* Initialize the authentication module |
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*/ |
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void auth_init(void) |
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{ |
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assert(auth_mod.name); |
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assert(auth_mod.init); |
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assert(auth_mod.verify); |
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INFO("Using authentication module '%s'\n", auth_mod.name); |
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if (auth_mod.init() != 0) |
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assert(0); |
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} |
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/*
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* Authenticate a certificate/image |
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* |
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* Return: 0 = success, Otherwise = error |
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*/ |
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int auth_verify_obj(unsigned int obj_id, uintptr_t obj_buf, size_t len) |
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{ |
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assert(obj_id < AUTH_NUM_OBJ); |
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assert(obj_buf != 0); |
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assert(auth_mod.verify); |
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return auth_mod.verify(obj_id, obj_buf, len); |
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} |
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@ -1,88 +0,0 @@ |
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/*
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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 AUTH_H_ |
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#define AUTH_H_ |
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#include <stddef.h> |
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#include <stdint.h> |
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/*
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* Authentication infrastructure for Trusted Boot |
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* |
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* This infrastructure provides an API to access the authentication module. This |
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* module will implement the required operations for Trusted Boot by creating an |
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* instance of the structure 'auth_mod_t'. This instance must be called |
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* 'auth_mod' and must provide the functions to initialize the module and |
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* verify the authenticity of the images. |
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*/ |
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/* Objects (images and certificates) involved in the TBB process */ |
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enum { |
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AUTH_BL2_IMG_CERT, |
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AUTH_BL2_IMG, |
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AUTH_TRUSTED_KEY_CERT, |
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AUTH_BL30_KEY_CERT, |
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AUTH_BL30_IMG_CERT, |
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AUTH_BL30_IMG, |
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AUTH_BL31_KEY_CERT, |
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AUTH_BL31_IMG_CERT, |
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AUTH_BL31_IMG, |
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AUTH_BL32_KEY_CERT, |
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AUTH_BL32_IMG_CERT, |
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AUTH_BL32_IMG, |
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AUTH_BL33_KEY_CERT, |
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AUTH_BL33_IMG_CERT, |
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AUTH_BL33_IMG, |
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AUTH_NUM_OBJ |
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}; |
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/* Authentication module structure */ |
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typedef struct auth_mod_s { |
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/* [mandatory] Module name. Printed to the log during initialization */ |
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const char *name; |
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/* [mandatory] Initialize the authentication module */ |
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int (*init)(void); |
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/* [mandatory] This function will be called to authenticate a new
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* object loaded into memory. The obj_id corresponds to one of the |
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* values in the enumeration above */ |
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int (*verify)(unsigned int obj_id, uintptr_t obj_buf, size_t len); |
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} auth_mod_t; |
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/* This variable must be instantiated by the authentication module */ |
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extern const auth_mod_t auth_mod; |
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/* Public functions */ |
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void auth_init(void); |
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int auth_verify_obj(unsigned int obj_id, uintptr_t obj_buf, size_t len); |
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#endif /* AUTH_H_ */ |
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