Jit Loon Lim | 7768a66 | 2023-05-17 12:26:11 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. |
| 3 | * Copyright (c) 2019-2023, Intel Corporation. All rights reserved. |
| 4 | * |
| 5 | * SPDX-License-Identifier: BSD-3-Clause |
| 6 | */ |
| 7 | |
| 8 | #include <assert.h> |
| 9 | #include <errno.h> |
| 10 | |
| 11 | #include <arch_helpers.h> |
| 12 | #include <common/debug.h> |
| 13 | #include <common/tbbr/tbbr_img_def.h> |
| 14 | #include <drivers/delay_timer.h> |
| 15 | #include <lib/mmio.h> |
| 16 | #include <lib/utils.h> |
| 17 | #include <tools_share/firmware_image_package.h> |
| 18 | |
| 19 | #include "socfpga_mailbox.h" |
| 20 | #include "socfpga_vab.h" |
| 21 | |
| 22 | static size_t get_img_size(uint8_t *img_buf, size_t img_buf_sz) |
| 23 | { |
| 24 | uint8_t *img_buf_end = img_buf + img_buf_sz; |
| 25 | uint32_t cert_sz = get_unaligned_le32(img_buf_end - sizeof(uint32_t)); |
| 26 | uint8_t *p = img_buf_end - cert_sz - sizeof(uint32_t); |
| 27 | |
| 28 | /* Ensure p is pointing within the img_buf */ |
| 29 | if (p < img_buf || p > (img_buf_end - VAB_CERT_HEADER_SIZE)) |
| 30 | return 0; |
| 31 | |
| 32 | if (get_unaligned_le32(p) == SDM_CERT_MAGIC_NUM) |
| 33 | return (size_t)(p - img_buf); |
| 34 | |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | |
| 39 | |
| 40 | int socfpga_vendor_authentication(void **p_image, size_t *p_size) |
| 41 | { |
| 42 | int retry_count = 20; |
| 43 | uint8_t hash384[FCS_SHA384_WORD_SIZE]; |
| 44 | uint64_t img_addr, mbox_data_addr; |
| 45 | uint32_t img_sz, mbox_data_sz; |
| 46 | uint8_t *cert_hash_ptr, *mbox_relocate_data_addr; |
| 47 | uint32_t resp = 0, resp_len = 1; |
| 48 | int ret = 0; |
| 49 | |
| 50 | img_addr = (uintptr_t)*p_image; |
| 51 | img_sz = get_img_size((uint8_t *)img_addr, *p_size); |
| 52 | |
| 53 | if (!img_sz) { |
| 54 | NOTICE("VAB certificate not found in image!\n"); |
| 55 | return -ENOVABIMG; |
| 56 | } |
| 57 | |
| 58 | if (!IS_BYTE_ALIGNED(img_sz, sizeof(uint32_t))) { |
| 59 | NOTICE("Image size (%d bytes) not aliged to 4 bytes!\n", img_sz); |
| 60 | return -EIMGERR; |
| 61 | } |
| 62 | |
| 63 | /* Generate HASH384 from the image */ |
| 64 | /* TODO: This part need to cross check !!!!!! */ |
| 65 | sha384_csum_wd((uint8_t *)img_addr, img_sz, hash384, CHUNKSZ_PER_WD_RESET); |
| 66 | cert_hash_ptr = (uint8_t *)(img_addr + img_sz + |
| 67 | VAB_CERT_MAGIC_OFFSET + VAB_CERT_FIT_SHA384_OFFSET); |
| 68 | |
| 69 | /* |
| 70 | * Compare the SHA384 found in certificate against the SHA384 |
| 71 | * calculated from image |
| 72 | */ |
| 73 | if (memcmp(hash384, cert_hash_ptr, FCS_SHA384_WORD_SIZE)) { |
| 74 | NOTICE("SHA384 does not match!\n"); |
| 75 | return -EKEYREJECTED; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | mbox_data_addr = img_addr + img_sz - sizeof(uint32_t); |
| 80 | /* Size in word (32bits) */ |
| 81 | mbox_data_sz = (BYTE_ALIGN(*p_size - img_sz, sizeof(uint32_t))) >> 2; |
| 82 | |
| 83 | NOTICE("mbox_data_addr = %lx mbox_data_sz = %d\n", mbox_data_addr, mbox_data_sz); |
| 84 | |
| 85 | /* TODO: This part need to cross check !!!!!! */ |
| 86 | // mbox_relocate_data_addr = (uint8_t *)malloc(mbox_data_sz * sizeof(uint32_t)); |
| 87 | // if (!mbox_relocate_data_addr) { |
| 88 | // NOTICE("Cannot allocate memory for VAB certificate relocation!\n"); |
| 89 | // return -ENOMEM; |
| 90 | // } |
| 91 | |
| 92 | memcpy(mbox_relocate_data_addr, (uint8_t *)mbox_data_addr, mbox_data_sz * sizeof(uint32_t)); |
| 93 | *(uint32_t *)mbox_relocate_data_addr = 0; |
| 94 | |
| 95 | do { |
| 96 | /* Invoke SMC call to ATF to send the VAB certificate to SDM */ |
| 97 | ret = mailbox_send_cmd(MBOX_JOB_ID, MBOX_CMD_VAB_SRC_CERT, |
| 98 | (uint32_t *)mbox_relocate_data_addr, mbox_data_sz, 0, &resp, &resp_len); |
| 99 | |
| 100 | /* If SDM is not available, just delay 50ms and retry again */ |
| 101 | /* 0x1FF = The device is busy */ |
| 102 | if (ret == MBOX_RESP_ERR(0x1FF)) { |
| 103 | mdelay(50); |
| 104 | } else { |
| 105 | break; |
| 106 | } |
| 107 | } while (--retry_count); |
| 108 | |
| 109 | /* Free the relocate certificate memory space */ |
| 110 | zeromem((void *)&mbox_relocate_data_addr, sizeof(uint32_t)); |
| 111 | |
| 112 | |
| 113 | /* Exclude the size of the VAB certificate from image size */ |
| 114 | *p_size = img_sz; |
| 115 | |
| 116 | if (ret) { |
| 117 | /* |
| 118 | * Unsupported mailbox command or device not in the |
| 119 | * owned/secure state |
| 120 | */ |
| 121 | /* 0x85 = Not allowed under current security setting */ |
| 122 | if (ret == MBOX_RESP_ERR(0x85)) { |
| 123 | /* SDM bypass authentication */ |
| 124 | NOTICE("Image Authentication bypassed at address\n"); |
| 125 | return 0; |
| 126 | } |
| 127 | NOTICE("VAB certificate authentication failed in SDM\n"); |
| 128 | /* 0x1FF = The device is busy */ |
| 129 | if (ret == MBOX_RESP_ERR(0x1FF)) { |
| 130 | NOTICE("Operation timed out\n"); |
| 131 | return -ETIMEOUT; |
| 132 | } else if (ret == MBOX_WRONG_ID) { |
| 133 | NOTICE("No such process\n"); |
| 134 | return -EPROCESS; |
| 135 | } |
| 136 | } else { |
| 137 | /* If Certificate Process Status has error */ |
| 138 | if (resp) { |
| 139 | NOTICE("VAB certificate execution format error\n"); |
| 140 | return -EIMGERR; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | NOTICE("Image Authentication bypassed at address\n"); |
| 145 | return ret; |
| 146 | |
| 147 | } |
| 148 | |
| 149 | static uint32_t get_unaligned_le32(const void *p) |
| 150 | { |
| 151 | /* TODO: Temp for testing */ |
| 152 | //return le32_to_cpup((__le32 *)p); |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | void sha384_csum_wd(const unsigned char *input, unsigned int ilen, |
| 157 | unsigned char *output, unsigned int chunk_sz) |
| 158 | { |
| 159 | /* TODO: Update sha384 start, update and finish */ |
| 160 | } |