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- /*
- * (C) Copyright 2018, Linaro Limited
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #include <avb_verify.h>
- #include <blk.h>
- #include <cpu_func.h>
- #include <fastboot.h>
- #include <image.h>
- #include <malloc.h>
- #include <part.h>
- #include <tee.h>
- #include <tee/optee_ta_avb.h>
- static const unsigned char avb_root_pub[1032] = {
- 0x0, 0x0, 0x10, 0x0, 0x55, 0xd9, 0x4, 0xad, 0xd8, 0x4,
- 0xaf, 0xe3, 0xd3, 0x84, 0x6c, 0x7e, 0xd, 0x89, 0x3d, 0xc2,
- 0x8c, 0xd3, 0x12, 0x55, 0xe9, 0x62, 0xc9, 0xf1, 0xf, 0x5e,
- 0xcc, 0x16, 0x72, 0xab, 0x44, 0x7c, 0x2c, 0x65, 0x4a, 0x94,
- 0xb5, 0x16, 0x2b, 0x0, 0xbb, 0x6, 0xef, 0x13, 0x7, 0x53,
- 0x4c, 0xf9, 0x64, 0xb9, 0x28, 0x7a, 0x1b, 0x84, 0x98, 0x88,
- 0xd8, 0x67, 0xa4, 0x23, 0xf9, 0xa7, 0x4b, 0xdc, 0x4a, 0xf,
- 0xf7, 0x3a, 0x18, 0xae, 0x54, 0xa8, 0x15, 0xfe, 0xb0, 0xad,
- 0xac, 0x35, 0xda, 0x3b, 0xad, 0x27, 0xbc, 0xaf, 0xe8, 0xd3,
- 0x2f, 0x37, 0x34, 0xd6, 0x51, 0x2b, 0x6c, 0x5a, 0x27, 0xd7,
- 0x96, 0x6, 0xaf, 0x6b, 0xb8, 0x80, 0xca, 0xfa, 0x30, 0xb4,
- 0xb1, 0x85, 0xb3, 0x4d, 0xaa, 0xaa, 0xc3, 0x16, 0x34, 0x1a,
- 0xb8, 0xe7, 0xc7, 0xfa, 0xf9, 0x9, 0x77, 0xab, 0x97, 0x93,
- 0xeb, 0x44, 0xae, 0xcf, 0x20, 0xbc, 0xf0, 0x80, 0x11, 0xdb,
- 0x23, 0xc, 0x47, 0x71, 0xb9, 0x6d, 0xd6, 0x7b, 0x60, 0x47,
- 0x87, 0x16, 0x56, 0x93, 0xb7, 0xc2, 0x2a, 0x9a, 0xb0, 0x4c,
- 0x1, 0xc, 0x30, 0xd8, 0x93, 0x87, 0xf0, 0xed, 0x6e, 0x8b,
- 0xbe, 0x30, 0x5b, 0xf6, 0xa6, 0xaf, 0xdd, 0x80, 0x7c, 0x45,
- 0x5e, 0x8f, 0x91, 0x93, 0x5e, 0x44, 0xfe, 0xb8, 0x82, 0x7,
- 0xee, 0x79, 0xca, 0xbf, 0x31, 0x73, 0x62, 0x58, 0xe3, 0xcd,
- 0xc4, 0xbc, 0xc2, 0x11, 0x1d, 0xa1, 0x4a, 0xbf, 0xfe, 0x27,
- 0x7d, 0xa1, 0xf6, 0x35, 0xa3, 0x5e, 0xca, 0xdc, 0x57, 0x2f,
- 0x3e, 0xf0, 0xc9, 0x5d, 0x86, 0x6a, 0xf8, 0xaf, 0x66, 0xa7,
- 0xed, 0xcd, 0xb8, 0xed, 0xa1, 0x5f, 0xba, 0x9b, 0x85, 0x1a,
- 0xd5, 0x9, 0xae, 0x94, 0x4e, 0x3b, 0xcf, 0xcb, 0x5c, 0xc9,
- 0x79, 0x80, 0xf7, 0xcc, 0xa6, 0x4a, 0xa8, 0x6a, 0xd8, 0xd3,
- 0x31, 0x11, 0xf9, 0xf6, 0x2, 0x63, 0x2a, 0x1a, 0x2d, 0xd1,
- 0x1a, 0x66, 0x1b, 0x16, 0x41, 0xbd, 0xbd, 0xf7, 0x4d, 0xc0,
- 0x4a, 0xe5, 0x27, 0x49, 0x5f, 0x7f, 0x58, 0xe3, 0x27, 0x2d,
- 0xe5, 0xc9, 0x66, 0xe, 0x52, 0x38, 0x16, 0x38, 0xfb, 0x16,
- 0xeb, 0x53, 0x3f, 0xe6, 0xfd, 0xe9, 0xa2, 0x5e, 0x25, 0x59,
- 0xd8, 0x79, 0x45, 0xff, 0x3, 0x4c, 0x26, 0xa2, 0x0, 0x5a,
- 0x8e, 0xc2, 0x51, 0xa1, 0x15, 0xf9, 0x7b, 0xf4, 0x5c, 0x81,
- 0x9b, 0x18, 0x47, 0x35, 0xd8, 0x2d, 0x5, 0xe9, 0xad, 0xf,
- 0x35, 0x74, 0x15, 0xa3, 0x8e, 0x8b, 0xcc, 0x27, 0xda, 0x7c,
- 0x5d, 0xe4, 0xfa, 0x4, 0xd3, 0x5, 0xb, 0xba, 0x3a, 0xb2,
- 0x49, 0x45, 0x2f, 0x47, 0xc7, 0xd, 0x41, 0x3f, 0x97, 0x80,
- 0x4d, 0x3f, 0xc1, 0xb5, 0xbb, 0x70, 0x5f, 0xa7, 0x37, 0xaf,
- 0x48, 0x22, 0x12, 0x45, 0x2e, 0xf5, 0xf, 0x87, 0x92, 0xe2,
- 0x84, 0x1, 0xf9, 0x12, 0xf, 0x14, 0x15, 0x24, 0xce, 0x89,
- 0x99, 0xee, 0xb9, 0xc4, 0x17, 0x70, 0x70, 0x15, 0xea, 0xbe,
- 0xc6, 0x6c, 0x1f, 0x62, 0xb3, 0xf4, 0x2d, 0x16, 0x87, 0xfb,
- 0x56, 0x1e, 0x45, 0xab, 0xae, 0x32, 0xe4, 0x5e, 0x91, 0xed,
- 0x53, 0x66, 0x5e, 0xbd, 0xed, 0xad, 0xe6, 0x12, 0x39, 0xd,
- 0x83, 0xc9, 0xe8, 0x6b, 0x6c, 0x2d, 0xa5, 0xee, 0xc4, 0x5a,
- 0x66, 0xae, 0x8c, 0x97, 0xd7, 0xd, 0x6c, 0x49, 0xc7, 0xf5,
- 0xc4, 0x92, 0x31, 0x8b, 0x9, 0xee, 0x33, 0xda, 0xa9, 0x37,
- 0xb6, 0x49, 0x18, 0xf8, 0xe, 0x60, 0x45, 0xc8, 0x33, 0x91,
- 0xef, 0x20, 0x57, 0x10, 0xbe, 0x78, 0x2d, 0x83, 0x26, 0xd6,
- 0xca, 0x61, 0xf9, 0x2f, 0xe0, 0xbf, 0x5, 0x30, 0x52, 0x5a,
- 0x12, 0x1c, 0x0, 0xa7, 0x5d, 0xcc, 0x7c, 0x2e, 0xc5, 0x95,
- 0x8b, 0xa3, 0x3b, 0xf0, 0x43, 0x2e, 0x5e, 0xdd, 0x0, 0xdb,
- 0xd, 0xb3, 0x37, 0x99, 0xa9, 0xcd, 0x9c, 0xb7, 0x43, 0xf7,
- 0x35, 0x44, 0x21, 0xc2, 0x82, 0x71, 0xab, 0x8d, 0xaa, 0xb4,
- 0x41, 0x11, 0xec, 0x1e, 0x8d, 0xfc, 0x14, 0x82, 0x92, 0x4e,
- 0x83, 0x6a, 0xa, 0x6b, 0x35, 0x5e, 0x5d, 0xe9, 0x5c, 0xcc,
- 0x8c, 0xde, 0x39, 0xd1, 0x4a, 0x5b, 0x5f, 0x63, 0xa9, 0x64,
- 0xe0, 0xa, 0xcb, 0xb, 0xb8, 0x5a, 0x7c, 0xc3, 0xb, 0xe6,
- 0xbe, 0xfe, 0x8b, 0xf, 0x7d, 0x34, 0x8e, 0x2, 0x66, 0x74,
- 0x1, 0x6c, 0xca, 0x76, 0xac, 0x7c, 0x67, 0x8, 0x2f, 0x3f,
- 0x1a, 0xa6, 0x2c, 0x60, 0xb3, 0xff, 0xda, 0x8d, 0xb8, 0x12,
- 0xc, 0x0, 0x7f, 0xcc, 0x50, 0xa1, 0x5c, 0x64, 0xa1, 0xe2,
- 0x5f, 0x32, 0x65, 0xc9, 0x9c, 0xbe, 0xd6, 0xa, 0x13, 0x87,
- 0x3c, 0x2a, 0x45, 0x47, 0xc, 0xca, 0x42, 0x82, 0xfa, 0x89,
- 0x65, 0xe7, 0x89, 0xb4, 0x8f, 0xf7, 0x1e, 0xe6, 0x23, 0xa5,
- 0xd0, 0x59, 0x37, 0x79, 0x92, 0xd7, 0xce, 0x3d, 0xfd, 0xe3,
- 0xa1, 0xb, 0xcf, 0x6c, 0x85, 0xa0, 0x65, 0xf3, 0x5c, 0xc6,
- 0x4a, 0x63, 0x5f, 0x6e, 0x3a, 0x3a, 0x2a, 0x8b, 0x6a, 0xb6,
- 0x2f, 0xbb, 0xf8, 0xb2, 0x4b, 0x62, 0xbc, 0x1a, 0x91, 0x25,
- 0x66, 0xe3, 0x69, 0xca, 0x60, 0x49, 0xb, 0xf6, 0x8a, 0xbe,
- 0x3e, 0x76, 0x53, 0xc2, 0x7a, 0xa8, 0x4, 0x17, 0x75, 0xf1,
- 0xf3, 0x3, 0x62, 0x1b, 0x85, 0xb2, 0xb0, 0xef, 0x80, 0x15,
- 0xb6, 0xd4, 0x4e, 0xdf, 0x71, 0xac, 0xdb, 0x2a, 0x4, 0xd4,
- 0xb4, 0x21, 0xba, 0x65, 0x56, 0x57, 0xe8, 0xfa, 0x84, 0xa2,
- 0x7d, 0x13, 0xe, 0xaf, 0xd7, 0x9a, 0x58, 0x2a, 0xa3, 0x81,
- 0x84, 0x8d, 0x9, 0xa0, 0x6a, 0xc1, 0xbb, 0xd9, 0xf5, 0x86,
- 0xac, 0xbd, 0x75, 0x61, 0x9, 0xe6, 0x8c, 0x3d, 0x77, 0xb2,
- 0xed, 0x30, 0x20, 0xe4, 0x0, 0x1d, 0x97, 0xe8, 0xbf, 0xc7,
- 0x0, 0x1b, 0x21, 0xb1, 0x16, 0xe7, 0x41, 0x67, 0x2e, 0xec,
- 0x38, 0xbc, 0xe5, 0x1b, 0xb4, 0x6, 0x23, 0x31, 0x71, 0x1c,
- 0x49, 0xcd, 0x76, 0x4a, 0x76, 0x36, 0x8d, 0xa3, 0x89, 0x8b,
- 0x4a, 0x7a, 0xf4, 0x87, 0xc8, 0x15, 0xf, 0x37, 0x39, 0xf6,
- 0x6d, 0x80, 0x19, 0xef, 0x5c, 0xa8, 0x66, 0xce, 0x1b, 0x16,
- 0x79, 0x21, 0xdf, 0xd7, 0x31, 0x30, 0xc4, 0x21, 0xdd, 0x34,
- 0x5b, 0xd2, 0x1a, 0x2b, 0x3e, 0x5d, 0xf7, 0xea, 0xca, 0x5,
- 0x8e, 0xb7, 0xcb, 0x49, 0x2e, 0xa0, 0xe3, 0xf4, 0xa7, 0x48,
- 0x19, 0x10, 0x9c, 0x4, 0xa7, 0xf4, 0x28, 0x74, 0xc8, 0x6f,
- 0x63, 0x20, 0x2b, 0x46, 0x24, 0x26, 0x19, 0x1d, 0xd1, 0x2c,
- 0x31, 0x6d, 0x5a, 0x29, 0xa2, 0x6, 0xa6, 0xb2, 0x41, 0xcc,
- 0xa, 0x27, 0x96, 0x9, 0x96, 0xac, 0x47, 0x65, 0x78, 0x68,
- 0x51, 0x98, 0xd6, 0xd8, 0xa6, 0x2d, 0xa0, 0xcf, 0xec, 0xe2,
- 0x74, 0xf2, 0x82, 0xe3, 0x97, 0xd9, 0x7e, 0xd4, 0xf8, 0xb,
- 0x70, 0x43, 0x3d, 0xb1, 0x7b, 0x97, 0x80, 0xd6, 0xcb, 0xd7,
- 0x19, 0xbc, 0x63, 0xb, 0xfd, 0x4d, 0x88, 0xfe, 0x67, 0xac,
- 0xb8, 0xcc, 0x50, 0xb7, 0x68, 0xb3, 0x5b, 0xd6, 0x1e, 0x25,
- 0xfc, 0x5f, 0x3c, 0x8d, 0xb1, 0x33, 0x7c, 0xb3, 0x49, 0x1,
- 0x3f, 0x71, 0x55, 0xe, 0x51, 0xba, 0x61, 0x26, 0xfa, 0xea,
- 0xe5, 0xb5, 0xe8, 0xaa, 0xcf, 0xcd, 0x96, 0x9f, 0xd6, 0xc1,
- 0x5f, 0x53, 0x91, 0xad, 0x5, 0xde, 0x20, 0xe7, 0x51, 0xda,
- 0x5b, 0x95, 0x67, 0xed, 0xf4, 0xee, 0x42, 0x65, 0x70, 0x13,
- 0xb, 0x70, 0x14, 0x1c, 0xc9, 0xe0, 0x19, 0xca, 0x5f, 0xf5,
- 0x1d, 0x70, 0x4b, 0x6c, 0x6, 0x74, 0xec, 0xb5, 0x2e, 0x77,
- 0xe1, 0x74, 0xa1, 0xa3, 0x99, 0xa0, 0x85, 0x9e, 0xf1, 0xac,
- 0xd8, 0x7e,
- };
- /**
- * ============================================================================
- * Boot states support (GREEN, YELLOW, ORANGE, RED) and dm_verity
- * ============================================================================
- */
- char *avb_set_state(AvbOps *ops, enum avb_boot_state boot_state)
- {
- struct AvbOpsData *data;
- char *cmdline = NULL;
- if (!ops)
- return NULL;
- data = (struct AvbOpsData *)ops->user_data;
- if (!data)
- return NULL;
- data->boot_state = boot_state;
- switch (boot_state) {
- case AVB_GREEN:
- cmdline = "androidboot.verifiedbootstate=green";
- break;
- case AVB_YELLOW:
- cmdline = "androidboot.verifiedbootstate=yellow";
- break;
- case AVB_ORANGE:
- cmdline = "androidboot.verifiedbootstate=orange";
- case AVB_RED:
- break;
- }
- return cmdline;
- }
- char *append_cmd_line(char *cmdline_orig, char *cmdline_new)
- {
- char *cmd_line;
- if (!cmdline_new)
- return cmdline_orig;
- if (cmdline_orig)
- cmd_line = cmdline_orig;
- else
- cmd_line = " ";
- cmd_line = avb_strdupv(cmd_line, " ", cmdline_new, NULL);
- return cmd_line;
- }
- static int avb_find_dm_args(char **args, char *str)
- {
- int i;
- if (!str)
- return -1;
- for (i = 0; i < AVB_MAX_ARGS && args[i]; ++i) {
- if (strstr(args[i], str))
- return i;
- }
- return -1;
- }
- static char *avb_set_enforce_option(const char *cmdline, const char *option)
- {
- char *cmdarg[AVB_MAX_ARGS];
- char *newargs = NULL;
- int i = 0;
- int total_args;
- memset(cmdarg, 0, sizeof(cmdarg));
- cmdarg[i++] = strtok((char *)cmdline, " ");
- do {
- cmdarg[i] = strtok(NULL, " ");
- if (!cmdarg[i])
- break;
- if (++i >= AVB_MAX_ARGS) {
- printf("%s: Can't handle more then %d args\n",
- __func__, i);
- return NULL;
- }
- } while (true);
- total_args = i;
- i = avb_find_dm_args(&cmdarg[0], VERITY_TABLE_OPT_LOGGING);
- if (i >= 0) {
- cmdarg[i] = (char *)option;
- } else {
- i = avb_find_dm_args(&cmdarg[0], VERITY_TABLE_OPT_RESTART);
- if (i < 0) {
- printf("%s: No verity options found\n", __func__);
- return NULL;
- }
- cmdarg[i] = (char *)option;
- }
- for (i = 0; i <= total_args; i++)
- newargs = append_cmd_line(newargs, cmdarg[i]);
- return newargs;
- }
- char *avb_set_ignore_corruption(const char *cmdline)
- {
- char *newargs = NULL;
- newargs = avb_set_enforce_option(cmdline, VERITY_TABLE_OPT_LOGGING);
- if (newargs)
- newargs = append_cmd_line(newargs,
- "androidboot.veritymode=eio");
- return newargs;
- }
- char *avb_set_enforce_verity(const char *cmdline)
- {
- char *newargs;
- newargs = avb_set_enforce_option(cmdline, VERITY_TABLE_OPT_RESTART);
- if (newargs)
- newargs = append_cmd_line(newargs,
- "androidboot.veritymode=enforcing");
- return newargs;
- }
- /**
- * ============================================================================
- * IO(mmc) auxiliary functions
- * ============================================================================
- */
- static unsigned long mmc_read_and_flush(struct mmc_part *part,
- lbaint_t start,
- lbaint_t sectors,
- void *buffer)
- {
- unsigned long blks;
- void *tmp_buf;
- size_t buf_size;
- bool unaligned = is_buf_unaligned(buffer);
- if (start < part->info.start) {
- printf("%s: partition start out of bounds\n", __func__);
- return 0;
- }
- if ((start + sectors) > (part->info.start + part->info.size)) {
- sectors = part->info.start + part->info.size - start;
- printf("%s: read sector aligned to partition bounds (%ld)\n",
- __func__, sectors);
- }
- /*
- * Reading fails on unaligned buffers, so we have to
- * use aligned temporary buffer and then copy to destination
- */
- if (unaligned) {
- printf("Handling unaligned read buffer..\n");
- tmp_buf = get_sector_buf();
- buf_size = get_sector_buf_size();
- if (sectors > buf_size / part->info.blksz)
- sectors = buf_size / part->info.blksz;
- } else {
- tmp_buf = buffer;
- }
- blks = blk_dread(part->mmc_blk,
- start, sectors, tmp_buf);
- /* flush cache after read */
- flush_cache((ulong)tmp_buf, sectors * part->info.blksz);
- if (unaligned)
- memcpy(buffer, tmp_buf, sectors * part->info.blksz);
- return blks;
- }
- static unsigned long mmc_write(struct mmc_part *part, lbaint_t start,
- lbaint_t sectors, void *buffer)
- {
- void *tmp_buf;
- size_t buf_size;
- bool unaligned = is_buf_unaligned(buffer);
- if (start < part->info.start) {
- printf("%s: partition start out of bounds\n", __func__);
- return 0;
- }
- if ((start + sectors) > (part->info.start + part->info.size)) {
- sectors = part->info.start + part->info.size - start;
- printf("%s: sector aligned to partition bounds (%ld)\n",
- __func__, sectors);
- }
- if (unaligned) {
- tmp_buf = get_sector_buf();
- buf_size = get_sector_buf_size();
- printf("Handling unaligned wrire buffer..\n");
- if (sectors > buf_size / part->info.blksz)
- sectors = buf_size / part->info.blksz;
- memcpy(tmp_buf, buffer, sectors * part->info.blksz);
- } else {
- tmp_buf = buffer;
- }
- return blk_dwrite(part->mmc_blk,
- start, sectors, tmp_buf);
- }
- static struct mmc_part *get_partition(AvbOps *ops, const char *partition)
- {
- int ret;
- u8 dev_num;
- int part_num = 0;
- struct mmc_part *part;
- struct blk_desc *mmc_blk;
- part = malloc(sizeof(struct mmc_part));
- if (!part)
- return NULL;
- dev_num = get_boot_device(ops);
- part->mmc = find_mmc_device(dev_num);
- if (!part->mmc) {
- printf("No MMC device at slot %x\n", dev_num);
- goto err;
- }
- if (mmc_init(part->mmc)) {
- printf("MMC initialization failed\n");
- goto err;
- }
- ret = mmc_switch_part(part->mmc, part_num);
- if (ret)
- goto err;
- mmc_blk = mmc_get_blk_desc(part->mmc);
- if (!mmc_blk) {
- printf("Error - failed to obtain block descriptor\n");
- goto err;
- }
- ret = part_get_info_by_name(mmc_blk, partition, &part->info);
- if (!ret) {
- printf("Can't find partition '%s'\n", partition);
- goto err;
- }
- part->dev_num = dev_num;
- part->mmc_blk = mmc_blk;
- return part;
- err:
- free(part);
- return NULL;
- }
- static AvbIOResult mmc_byte_io(AvbOps *ops,
- const char *partition,
- s64 offset,
- size_t num_bytes,
- void *buffer,
- size_t *out_num_read,
- enum mmc_io_type io_type)
- {
- ulong ret;
- struct mmc_part *part;
- u64 start_offset, start_sector, sectors, residue;
- u8 *tmp_buf;
- size_t io_cnt = 0;
- if (!partition || !buffer || io_type > IO_WRITE)
- return AVB_IO_RESULT_ERROR_IO;
- part = get_partition(ops, partition);
- if (!part)
- return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
- if (!part->info.blksz)
- return AVB_IO_RESULT_ERROR_IO;
- start_offset = calc_offset(part, offset);
- while (num_bytes) {
- start_sector = start_offset / part->info.blksz;
- sectors = num_bytes / part->info.blksz;
- /* handle non block-aligned reads */
- if (start_offset % part->info.blksz ||
- num_bytes < part->info.blksz) {
- tmp_buf = get_sector_buf();
- if (start_offset % part->info.blksz) {
- residue = part->info.blksz -
- (start_offset % part->info.blksz);
- if (residue > num_bytes)
- residue = num_bytes;
- } else {
- residue = num_bytes;
- }
- if (io_type == IO_READ) {
- ret = mmc_read_and_flush(part,
- part->info.start +
- start_sector,
- 1, tmp_buf);
- if (ret != 1) {
- printf("%s: read error (%ld, %lld)\n",
- __func__, ret, start_sector);
- return AVB_IO_RESULT_ERROR_IO;
- }
- /*
- * if this is not aligned at sector start,
- * we have to adjust the tmp buffer
- */
- tmp_buf += (start_offset % part->info.blksz);
- memcpy(buffer, (void *)tmp_buf, residue);
- } else {
- ret = mmc_read_and_flush(part,
- part->info.start +
- start_sector,
- 1, tmp_buf);
- if (ret != 1) {
- printf("%s: read error (%ld, %lld)\n",
- __func__, ret, start_sector);
- return AVB_IO_RESULT_ERROR_IO;
- }
- memcpy((void *)tmp_buf +
- start_offset % part->info.blksz,
- buffer, residue);
- ret = mmc_write(part, part->info.start +
- start_sector, 1, tmp_buf);
- if (ret != 1) {
- printf("%s: write error (%ld, %lld)\n",
- __func__, ret, start_sector);
- return AVB_IO_RESULT_ERROR_IO;
- }
- }
- io_cnt += residue;
- buffer += residue;
- start_offset += residue;
- num_bytes -= residue;
- continue;
- }
- if (sectors) {
- if (io_type == IO_READ) {
- ret = mmc_read_and_flush(part,
- part->info.start +
- start_sector,
- sectors, buffer);
- } else {
- ret = mmc_write(part,
- part->info.start +
- start_sector,
- sectors, buffer);
- }
- if (!ret) {
- printf("%s: sector read error\n", __func__);
- return AVB_IO_RESULT_ERROR_IO;
- }
- io_cnt += ret * part->info.blksz;
- buffer += ret * part->info.blksz;
- start_offset += ret * part->info.blksz;
- num_bytes -= ret * part->info.blksz;
- }
- }
- /* Set counter for read operation */
- if (io_type == IO_READ && out_num_read)
- *out_num_read = io_cnt;
- return AVB_IO_RESULT_OK;
- }
- /**
- * ============================================================================
- * AVB 2.0 operations
- * ============================================================================
- */
- /**
- * read_from_partition() - reads @num_bytes from @offset from partition
- * identified by a string name
- *
- * @ops: contains AVB ops handlers
- * @partition_name: partition name, NUL-terminated UTF-8 string
- * @offset: offset from the beginning of partition
- * @num_bytes: amount of bytes to read
- * @buffer: destination buffer to store data
- * @out_num_read:
- *
- * @return:
- * AVB_IO_RESULT_OK, if partition was found and read operation succeed
- * AVB_IO_RESULT_ERROR_IO, if i/o error occurred from the underlying i/o
- * subsystem
- * AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if there is no partition with
- * the given name
- */
- static AvbIOResult read_from_partition(AvbOps *ops,
- const char *partition_name,
- s64 offset_from_partition,
- size_t num_bytes,
- void *buffer,
- size_t *out_num_read)
- {
- return mmc_byte_io(ops, partition_name, offset_from_partition,
- num_bytes, buffer, out_num_read, IO_READ);
- }
- /**
- * write_to_partition() - writes N bytes to a partition identified by a string
- * name
- *
- * @ops: AvbOps, contains AVB ops handlers
- * @partition_name: partition name
- * @offset_from_partition: offset from the beginning of partition
- * @num_bytes: amount of bytes to write
- * @buf: data to write
- * @out_num_read:
- *
- * @return:
- * AVB_IO_RESULT_OK, if partition was found and read operation succeed
- * AVB_IO_RESULT_ERROR_IO, if input/output error occurred
- * AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition, specified in
- * @partition_name was not found
- */
- static AvbIOResult write_to_partition(AvbOps *ops,
- const char *partition_name,
- s64 offset_from_partition,
- size_t num_bytes,
- const void *buffer)
- {
- return mmc_byte_io(ops, partition_name, offset_from_partition,
- num_bytes, (void *)buffer, NULL, IO_WRITE);
- }
- /**
- * validate_vmbeta_public_key() - checks if the given public key used to sign
- * the vbmeta partition is trusted
- *
- * @ops: AvbOps, contains AVB ops handlers
- * @public_key_data: public key for verifying vbmeta partition signature
- * @public_key_length: length of public key
- * @public_key_metadata:
- * @public_key_metadata_length:
- * @out_key_is_trusted:
- *
- * @return:
- * AVB_IO_RESULT_OK, if partition was found and read operation succeed
- */
- static AvbIOResult validate_vbmeta_public_key(AvbOps *ops,
- const u8 *public_key_data,
- size_t public_key_length,
- const u8
- *public_key_metadata,
- size_t
- public_key_metadata_length,
- bool *out_key_is_trusted)
- {
- if (!public_key_length || !public_key_data || !out_key_is_trusted)
- return AVB_IO_RESULT_ERROR_IO;
- *out_key_is_trusted = false;
- if (public_key_length != sizeof(avb_root_pub))
- return AVB_IO_RESULT_ERROR_IO;
- if (memcmp(avb_root_pub, public_key_data, public_key_length) == 0)
- *out_key_is_trusted = true;
- return AVB_IO_RESULT_OK;
- }
- #ifdef CONFIG_OPTEE_TA_AVB
- static int get_open_session(struct AvbOpsData *ops_data)
- {
- struct udevice *tee = NULL;
- while (!ops_data->tee) {
- const struct tee_optee_ta_uuid uuid = TA_AVB_UUID;
- struct tee_open_session_arg arg;
- int rc;
- tee = tee_find_device(tee, NULL, NULL, NULL);
- if (!tee)
- return -ENODEV;
- memset(&arg, 0, sizeof(arg));
- tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
- rc = tee_open_session(tee, &arg, 0, NULL);
- if (!rc) {
- ops_data->tee = tee;
- ops_data->session = arg.session;
- }
- }
- return 0;
- }
- static AvbIOResult invoke_func(struct AvbOpsData *ops_data, u32 func,
- ulong num_param, struct tee_param *param)
- {
- struct tee_invoke_arg arg;
- if (get_open_session(ops_data))
- return AVB_IO_RESULT_ERROR_IO;
- memset(&arg, 0, sizeof(arg));
- arg.func = func;
- arg.session = ops_data->session;
- if (tee_invoke_func(ops_data->tee, &arg, num_param, param))
- return AVB_IO_RESULT_ERROR_IO;
- switch (arg.ret) {
- case TEE_SUCCESS:
- return AVB_IO_RESULT_OK;
- case TEE_ERROR_OUT_OF_MEMORY:
- return AVB_IO_RESULT_ERROR_OOM;
- case TEE_ERROR_STORAGE_NO_SPACE:
- return AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE;
- case TEE_ERROR_ITEM_NOT_FOUND:
- return AVB_IO_RESULT_ERROR_NO_SUCH_VALUE;
- case TEE_ERROR_TARGET_DEAD:
- /*
- * The TA has paniced, close the session to reload the TA
- * for the next request.
- */
- tee_close_session(ops_data->tee, ops_data->session);
- ops_data->tee = NULL;
- return AVB_IO_RESULT_ERROR_IO;
- default:
- return AVB_IO_RESULT_ERROR_IO;
- }
- }
- #endif
- /**
- * read_rollback_index() - gets the rollback index corresponding to the
- * location of given by @out_rollback_index.
- *
- * @ops: contains AvbOps handlers
- * @rollback_index_slot:
- * @out_rollback_index: used to write a retrieved rollback index.
- *
- * @return
- * AVB_IO_RESULT_OK, if the roolback index was retrieved
- */
- static AvbIOResult read_rollback_index(AvbOps *ops,
- size_t rollback_index_slot,
- u64 *out_rollback_index)
- {
- #ifndef CONFIG_OPTEE_TA_AVB
- /* For now we always return 0 as the stored rollback index. */
- printf("%s not supported yet\n", __func__);
- if (out_rollback_index)
- *out_rollback_index = 0;
- return AVB_IO_RESULT_OK;
- #else
- AvbIOResult rc;
- struct tee_param param[2];
- if (rollback_index_slot >= TA_AVB_MAX_ROLLBACK_LOCATIONS)
- return AVB_IO_RESULT_ERROR_NO_SUCH_VALUE;
- memset(param, 0, sizeof(param));
- param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INPUT;
- param[0].u.value.a = rollback_index_slot;
- param[1].attr = TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT;
- rc = invoke_func(ops->user_data, TA_AVB_CMD_READ_ROLLBACK_INDEX,
- ARRAY_SIZE(param), param);
- if (rc)
- return rc;
- *out_rollback_index = (u64)param[1].u.value.a << 32 |
- (u32)param[1].u.value.b;
- return AVB_IO_RESULT_OK;
- #endif
- }
- /**
- * write_rollback_index() - sets the rollback index corresponding to the
- * location of given by @out_rollback_index.
- *
- * @ops: contains AvbOps handlers
- * @rollback_index_slot:
- * @rollback_index: rollback index to write.
- *
- * @return
- * AVB_IO_RESULT_OK, if the roolback index was retrieved
- */
- static AvbIOResult write_rollback_index(AvbOps *ops,
- size_t rollback_index_slot,
- u64 rollback_index)
- {
- #ifndef CONFIG_OPTEE_TA_AVB
- /* For now this is a no-op. */
- printf("%s not supported yet\n", __func__);
- return AVB_IO_RESULT_OK;
- #else
- struct tee_param param[2];
- if (rollback_index_slot >= TA_AVB_MAX_ROLLBACK_LOCATIONS)
- return AVB_IO_RESULT_ERROR_NO_SUCH_VALUE;
- memset(param, 0, sizeof(param));
- param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INPUT;
- param[0].u.value.a = rollback_index_slot;
- param[1].attr = TEE_PARAM_ATTR_TYPE_VALUE_INPUT;
- param[1].u.value.a = (u32)(rollback_index >> 32);
- param[1].u.value.b = (u32)rollback_index;
- return invoke_func(ops->user_data, TA_AVB_CMD_WRITE_ROLLBACK_INDEX,
- ARRAY_SIZE(param), param);
- #endif
- }
- /**
- * read_is_device_unlocked() - gets whether the device is unlocked
- *
- * @ops: contains AVB ops handlers
- * @out_is_unlocked: device unlock state is stored here, true if unlocked,
- * false otherwise
- *
- * @return:
- * AVB_IO_RESULT_OK: state is retrieved successfully
- * AVB_IO_RESULT_ERROR_IO: an error occurred
- */
- static AvbIOResult read_is_device_unlocked(AvbOps *ops, bool *out_is_unlocked)
- {
- #ifndef CONFIG_OPTEE_TA_AVB
- /* For now we always return that the device is unlocked. */
- printf("%s not supported yet\n", __func__);
- *out_is_unlocked = true;
- return AVB_IO_RESULT_OK;
- #else
- AvbIOResult rc;
- struct tee_param param = { .attr = TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT };
- rc = invoke_func(ops->user_data, TA_AVB_CMD_READ_LOCK_STATE, 1, ¶m);
- if (rc)
- return rc;
- *out_is_unlocked = !param.u.value.a;
- return AVB_IO_RESULT_OK;
- #endif
- }
- /**
- * get_unique_guid_for_partition() - gets the GUID for a partition identified
- * by a string name
- *
- * @ops: contains AVB ops handlers
- * @partition: partition name (NUL-terminated UTF-8 string)
- * @guid_buf: buf, used to copy in GUID string. Example of value:
- * 527c1c6d-6361-4593-8842-3c78fcd39219
- * @guid_buf_size: @guid_buf buffer size
- *
- * @return:
- * AVB_IO_RESULT_OK, on success (GUID found)
- * AVB_IO_RESULT_ERROR_IO, if incorrect buffer size (@guid_buf_size) was
- * provided
- * AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition was not found
- */
- static AvbIOResult get_unique_guid_for_partition(AvbOps *ops,
- const char *partition,
- char *guid_buf,
- size_t guid_buf_size)
- {
- struct mmc_part *part;
- size_t uuid_size;
- part = get_partition(ops, partition);
- if (!part)
- return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
- uuid_size = sizeof(part->info.uuid);
- if (uuid_size > guid_buf_size)
- return AVB_IO_RESULT_ERROR_IO;
- memcpy(guid_buf, part->info.uuid, uuid_size);
- guid_buf[uuid_size - 1] = 0;
- return AVB_IO_RESULT_OK;
- }
- /**
- * get_size_of_partition() - gets the size of a partition identified
- * by a string name
- *
- * @ops: contains AVB ops handlers
- * @partition: partition name (NUL-terminated UTF-8 string)
- * @out_size_num_bytes: returns the value of a partition size
- *
- * @return:
- * AVB_IO_RESULT_OK, on success (GUID found)
- * AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE, out_size_num_bytes is NULL
- * AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition was not found
- */
- static AvbIOResult get_size_of_partition(AvbOps *ops,
- const char *partition,
- u64 *out_size_num_bytes)
- {
- struct mmc_part *part;
- if (!out_size_num_bytes)
- return AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE;
- part = get_partition(ops, partition);
- if (!part)
- return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
- *out_size_num_bytes = part->info.blksz * part->info.size;
- return AVB_IO_RESULT_OK;
- }
- #ifdef CONFIG_OPTEE_TA_AVB
- static AvbIOResult read_persistent_value(AvbOps *ops,
- const char *name,
- size_t buffer_size,
- u8 *out_buffer,
- size_t *out_num_bytes_read)
- {
- AvbIOResult rc;
- struct tee_shm *shm_name;
- struct tee_shm *shm_buf;
- struct tee_param param[2];
- struct udevice *tee;
- size_t name_size = strlen(name) + 1;
- if (get_open_session(ops->user_data))
- return AVB_IO_RESULT_ERROR_IO;
- tee = ((struct AvbOpsData *)ops->user_data)->tee;
- rc = tee_shm_alloc(tee, name_size,
- TEE_SHM_ALLOC, &shm_name);
- if (rc)
- return AVB_IO_RESULT_ERROR_OOM;
- rc = tee_shm_alloc(tee, buffer_size,
- TEE_SHM_ALLOC, &shm_buf);
- if (rc) {
- rc = AVB_IO_RESULT_ERROR_OOM;
- goto free_name;
- }
- memcpy(shm_name->addr, name, name_size);
- memset(param, 0, sizeof(param));
- param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
- param[0].u.memref.shm = shm_name;
- param[0].u.memref.size = name_size;
- param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INOUT;
- param[1].u.memref.shm = shm_buf;
- param[1].u.memref.size = buffer_size;
- rc = invoke_func(ops->user_data, TA_AVB_CMD_READ_PERSIST_VALUE,
- 2, param);
- if (rc)
- goto out;
- if (param[1].u.memref.size > buffer_size) {
- rc = AVB_IO_RESULT_ERROR_NO_SUCH_VALUE;
- goto out;
- }
- *out_num_bytes_read = param[1].u.memref.size;
- memcpy(out_buffer, shm_buf->addr, *out_num_bytes_read);
- out:
- tee_shm_free(shm_buf);
- free_name:
- tee_shm_free(shm_name);
- return rc;
- }
- static AvbIOResult write_persistent_value(AvbOps *ops,
- const char *name,
- size_t value_size,
- const u8 *value)
- {
- AvbIOResult rc;
- struct tee_shm *shm_name;
- struct tee_shm *shm_buf;
- struct tee_param param[2];
- struct udevice *tee;
- size_t name_size = strlen(name) + 1;
- if (get_open_session(ops->user_data))
- return AVB_IO_RESULT_ERROR_IO;
- tee = ((struct AvbOpsData *)ops->user_data)->tee;
- if (!value_size)
- return AVB_IO_RESULT_ERROR_NO_SUCH_VALUE;
- rc = tee_shm_alloc(tee, name_size,
- TEE_SHM_ALLOC, &shm_name);
- if (rc)
- return AVB_IO_RESULT_ERROR_OOM;
- rc = tee_shm_alloc(tee, value_size,
- TEE_SHM_ALLOC, &shm_buf);
- if (rc) {
- rc = AVB_IO_RESULT_ERROR_OOM;
- goto free_name;
- }
- memcpy(shm_name->addr, name, name_size);
- memcpy(shm_buf->addr, value, value_size);
- memset(param, 0, sizeof(param));
- param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
- param[0].u.memref.shm = shm_name;
- param[0].u.memref.size = name_size;
- param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
- param[1].u.memref.shm = shm_buf;
- param[1].u.memref.size = value_size;
- rc = invoke_func(ops->user_data, TA_AVB_CMD_WRITE_PERSIST_VALUE,
- 2, param);
- if (rc)
- goto out;
- out:
- tee_shm_free(shm_buf);
- free_name:
- tee_shm_free(shm_name);
- return rc;
- }
- #endif
- /**
- * ============================================================================
- * AVB2.0 AvbOps alloc/initialisation/free
- * ============================================================================
- */
- AvbOps *avb_ops_alloc(int boot_device)
- {
- struct AvbOpsData *ops_data;
- ops_data = avb_calloc(sizeof(struct AvbOpsData));
- if (!ops_data)
- return NULL;
- ops_data->ops.user_data = ops_data;
- ops_data->ops.read_from_partition = read_from_partition;
- ops_data->ops.write_to_partition = write_to_partition;
- ops_data->ops.validate_vbmeta_public_key = validate_vbmeta_public_key;
- ops_data->ops.read_rollback_index = read_rollback_index;
- ops_data->ops.write_rollback_index = write_rollback_index;
- ops_data->ops.read_is_device_unlocked = read_is_device_unlocked;
- ops_data->ops.get_unique_guid_for_partition =
- get_unique_guid_for_partition;
- #ifdef CONFIG_OPTEE_TA_AVB
- ops_data->ops.write_persistent_value = write_persistent_value;
- ops_data->ops.read_persistent_value = read_persistent_value;
- #endif
- ops_data->ops.get_size_of_partition = get_size_of_partition;
- ops_data->mmc_dev = boot_device;
- return &ops_data->ops;
- }
- void avb_ops_free(AvbOps *ops)
- {
- struct AvbOpsData *ops_data;
- if (!ops)
- return;
- ops_data = ops->user_data;
- if (ops_data) {
- #ifdef CONFIG_OPTEE_TA_AVB
- if (ops_data->tee)
- tee_close_session(ops_data->tee, ops_data->session);
- #endif
- avb_free(ops_data);
- }
- }
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