1 /*
2 * Copyright (c) 2020 Embedded Planet
3 * Copyright (c) 2020 ARM Limited
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License
17 */
18
19 #if MCUBOOT_BOOTLOADER_BUILD
20
21 #include <stdlib.h>
22 #include "bootutil/bootutil.h"
23 #include "bootutil/image.h"
24 #include "hal/serial_api.h"
25 #include "platform/mbed_application.h"
26
27 #if (MCUBOOT_CRYPTO_BACKEND == MBEDTLS)
28 #include "mbedtls/platform.h"
29 #elif (MCUBOOT_CRYPTO_BACKEND == TINYCRYPT)
30 #include "tinycrypt/ecc.h"
31 #endif
32
33 #define MBED_TRACE_MAX_LEVEL TRACE_LEVEL_DEBUG
34 #define TRACE_GROUP "BL"
35 #include "mbed-trace/mbed_trace.h"
36
37 #if (MCUBOOT_CRYPTO_BACKEND == TINYCRYPT)
38 /* XXX add this global definition for linking only
39 * TinyCrypt is used for signature verification and ECIES using secp256r1 and AES encryption;
40 * RNG is not required. So here we provide a stub.
41 * See https://github.com/mcu-tools/mcuboot/pull/791#discussion_r514480098
42 */
43
44 extern "C" {
default_CSPRNG(uint8_t * dest,unsigned int size)45 int default_CSPRNG(uint8_t *dest, unsigned int size) { return 0; }
46 }
47 #endif
48
main()49 int main()
50 {
51 int rc;
52
53 #ifdef MCUBOOT_HAVE_LOGGING
54 mbed_trace_init();
55 #if MCUBOOT_LOG_BOOTLOADER_ONLY
56 mbed_trace_include_filters_set("MCUb,BL");
57 #endif //MCUBOOT_LOG_BOOTLOADER_ONLY
58 #endif //MCUBOOT_HAVE_LOGGING
59
60 tr_info("Starting MCUboot");
61
62 #if (MCUBOOT_CRYPTO_BACKEND == MBEDTLS)
63 // Initialize mbedtls crypto for use by MCUboot
64 mbedtls_platform_context unused_ctx;
65 rc = mbedtls_platform_setup(&unused_ctx);
66 if(rc != 0) {
67 tr_error("Failed to setup Mbed TLS, error: %d", rc);
68 exit(rc);
69 }
70 #elif (MCUBOOT_CRYPTO_BACKEND == TINYCRYPT)
71 uECC_set_rng(0);
72 #endif
73
74 struct boot_rsp rsp;
75 rc = boot_go(&rsp);
76 if(rc != 0) {
77 tr_error("Failed to locate firmware image, error: %d", rc);
78 exit(rc);
79 }
80
81 uint32_t address = rsp.br_image_off + rsp.br_hdr->ih_hdr_size;
82
83 // Workaround: The extra \n ensures the last trace gets flushed
84 // before mbed_start_application() destroys the stack and jumps
85 // to the application
86 tr_info("Booting firmware image at 0x%x\n", address);
87
88 // Run the application in the primary slot
89 // Add header size offset to calculate the actual start address of application
90 mbed_start_application(address);
91 }
92
93 #endif // MCUBOOT_BOOTLOADER_BUILD
94
