1 /* 2 * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. 3 * Copyright (c) 2019-2023, Intel Corporation. All rights reserved. 4 * Copyright (c) 2024-2025, Altera Corporation. All rights reserved. 5 * 6 * SPDX-License-Identifier: BSD-3-Clause 7 */ 8 9 #include <assert.h> 10 #include <errno.h> 11 12 #include "../lib/sha/sha.h" 13 14 #include <arch_helpers.h> 15 #include <common/bl_common.h> 16 #include <common/debug.h> 17 #include <common/desc_image_load.h> 18 #include <common/tbbr/tbbr_img_def.h> 19 #include <drivers/delay_timer.h> 20 #include <lib/mmio.h> 21 #include <lib/utils.h> 22 #include <plat/common/platform.h> 23 #include <tools_share/firmware_image_package.h> 24 25 #include "socfpga_mailbox.h" 26 #include "socfpga_vab.h" 27 28 size_t get_img_size(uint8_t *img_buf, size_t img_buf_sz) 29 { 30 uint8_t *img_buf_end = img_buf + img_buf_sz; 31 uint32_t cert_sz = get_unaligned_le32(img_buf_end - sizeof(uint32_t)); 32 uint8_t *p = img_buf_end - cert_sz - sizeof(uint32_t); 33 34 /* Ensure p is pointing within the img_buf */ 35 if (p < img_buf || p > (img_buf_end - VAB_CERT_HEADER_SIZE)) 36 return 0; 37 38 if (get_unaligned_le32(p) == SDM_CERT_MAGIC_NUM) 39 return (size_t)(p - img_buf); 40 41 return 0; 42 } 43 44 int socfpga_vab_init(unsigned int image_id) 45 { 46 int ret = 0; 47 size_t image_size; 48 void *image_base_ptr; 49 /* 50 * Get information about the images to load. 51 */ 52 bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id); 53 54 assert(bl_mem_params); 55 56 if (bl_mem_params == NULL) { 57 ERROR("SOCFPGA VAB Init failed\n"); 58 return -EINITREJECTED; 59 } 60 61 if ((image_id == BL31_IMAGE_ID) || (image_id == BL33_IMAGE_ID)) { 62 image_base_ptr = (void *)bl_mem_params->image_info.image_base; 63 image_size = bl_mem_params->image_info.image_size; 64 ret = socfpga_vab_authentication(&image_base_ptr, &image_size); 65 } 66 67 return ret; 68 } 69 70 int socfpga_vab_authentication(void **p_image, size_t *p_size) 71 { 72 int retry_count = 20; 73 uint8_t hash384[FCS_SHA384_WORD_SIZE]; 74 uint64_t img_addr, mbox_data_addr; 75 uint32_t img_sz, mbox_data_sz; 76 uint8_t *cert_hash_ptr, *mbox_relocate_data_addr; 77 uint32_t resp = 0, resp_len = 1; 78 int ret = 0; 79 uint8_t u8_buf_static[MBOX_DATA_MAX_LEN]; 80 81 mbox_relocate_data_addr = u8_buf_static; 82 83 img_addr = (uintptr_t)*p_image; 84 img_sz = get_img_size((uint8_t *)img_addr, *p_size); 85 86 if (!img_sz) { 87 ERROR("VAB certificate not found in image!\n"); 88 return -ENOVABCERT; 89 } 90 91 if (!IS_BYTE_ALIGNED(img_sz, sizeof(uint32_t))) { 92 ERROR("Image size (%d bytes) not aliged to 4 bytes!\n", img_sz); 93 return -EIMGERR; 94 } 95 96 /* Generate HASH384 from the image */ 97 sha384_start((uint8_t *)img_addr, img_sz, hash384, CHUNKSZ_PER_WD_RESET); 98 cert_hash_ptr = (uint8_t *)(img_addr + img_sz + VAB_CERT_MAGIC_OFFSET + 99 VAB_CERT_FIT_SHA384_OFFSET); 100 101 /* 102 * Compare the SHA384 found in certificate against the SHA384 103 * calculated from image 104 */ 105 if (memcmp(hash384, cert_hash_ptr, FCS_SHA384_WORD_SIZE)) { 106 ERROR("SHA384 does not match!\n"); 107 return -EKEYREJECTED; 108 } 109 110 mbox_data_addr = img_addr + img_sz - sizeof(uint32_t); 111 /* Size in word (32bits) */ 112 mbox_data_sz = (BYTE_ALIGN(*p_size - img_sz, sizeof(uint32_t))) >> 2; 113 114 VERBOSE("mbox_data_addr = %lx mbox_data_sz = %d\n", mbox_data_addr, mbox_data_sz); 115 116 memcpy_s(mbox_relocate_data_addr, (mbox_data_sz * sizeof(uint32_t)) / MBOX_WORD_BYTE, 117 (uint8_t *)mbox_data_addr, (mbox_data_sz * sizeof(uint32_t)) / MBOX_WORD_BYTE); 118 119 *((unsigned int *)mbox_relocate_data_addr) = 0; 120 121 do { 122 /* Invoke SMC call to ATF to send the VAB certificate to SDM */ 123 ret = mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_VAB_SRC_CERT, 124 (uint32_t *)mbox_relocate_data_addr, mbox_data_sz, 0, &resp, &resp_len); 125 126 /* If SDM is not available, just delay 50ms and retry again */ 127 /* 0x1FF = The device is busy */ 128 if (ret == MBOX_RESP_ERR(0x1FF)) { 129 mdelay(50); 130 } else { 131 break; 132 } 133 } while (--retry_count); 134 135 /* Free the relocate certificate memory space */ 136 zeromem((void *)&mbox_relocate_data_addr, sizeof(uint32_t)); 137 138 /* Exclude the size of the VAB certificate from image size */ 139 *p_size = img_sz; 140 141 if (ret) { 142 /* 143 * Unsupported mailbox command or device not in the 144 * owned/secure state 145 */ 146 /* 0x85 = Not allowed under current security setting */ 147 if (ret == MBOX_RESP_ERR(0x85)) { 148 /* SDM bypass authentication */ 149 ERROR("Image Authentication bypassed at address\n"); 150 return 0; 151 } 152 ERROR("VAB certificate authentication failed in SDM\n"); 153 /* 0x1FF = The device is busy */ 154 if (ret == MBOX_RESP_ERR(0x1FF)) { 155 ERROR("Operation timed out\n"); 156 return -ETIMEOUT; 157 } else if (ret == MBOX_WRONG_ID) { 158 ERROR("No such process\n"); 159 return -EPROCESS; 160 } 161 return -EAUTH; 162 } else { 163 /* If Certificate Process Status has error */ 164 if (resp) { 165 ERROR("VAB certificate execution format error\n"); 166 return -EIMGERR; 167 } 168 } 169 170 NOTICE("%s 0x%lx (%d bytes)\n", "Image Authentication passed at address", img_addr, img_sz); 171 return ret; 172 } 173 174 uint32_t get_unaligned_le32(const void *p) 175 { 176 return le32_to_cpue((uint32_t *)p); 177 } 178