diff options
Diffstat (limited to 'firmware/2lib/2api.c')
| -rw-r--r-- | firmware/2lib/2api.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/firmware/2lib/2api.c b/firmware/2lib/2api.c index ee63af3c..f6dcf5b8 100644 --- a/firmware/2lib/2api.c +++ b/firmware/2lib/2api.c @@ -16,6 +16,67 @@ #include "2sysincludes.h" #include "2tpm_bootmode.h" +vb2_error_t vb2api_inject_kernel_subkey( + struct vb2_context *ctx, + const uint8_t *kernel_packed_key_data, + uint32_t kernel_packed_key_data_size) +{ + struct vb2_shared_data *sd; + enum vb2_boot_mode *boot_mode; + struct vb2_workbuf wb; + struct vb2_packed_key *kernel_packed_key; + uint32_t kernel_packed_key_size; + void *dst_packed_key; + + sd = vb2_get_sd(ctx); + vb2_workbuf_from_ctx(ctx, &wb); + + /* Fully initialize the context and shared data. */ + sd->flags = 0; + /* Not in recovery. */ + sd->recovery_reason = 0; + /* FW not used. */ + sd->last_fw_slot = VB2_FW_SLOT_A; + sd->last_fw_result = VB2_FW_RESULT_UNKNOWN; + sd->fw_slot = VB2_FW_SLOT_A; + sd->fw_version = 0; + sd->fw_version_secdata = 0; + /* Clear status field. */ + sd->status = 0; + /* Invalid offset indicating GBB data is not available. */ + sd->gbb_offset = 0; + sd->kernel_version = 0; + sd->kernel_version_secdata = 0; + ctx->flags = 0; + boot_mode = (enum vb2_boot_mode *)&ctx->boot_mode; + *boot_mode = VB2_BOOT_MODE_NORMAL; + + /* Make sure passed buffer is big enough for the packed key. */ + kernel_packed_key = (struct vb2_packed_key *)kernel_packed_key_data; + VB2_TRY(vb2_verify_packed_key_inside(kernel_packed_key_data, + kernel_packed_key_data_size, + kernel_packed_key)); + + /* Allocate space in the workbuf in which to copy the key. */ + kernel_packed_key_size = + kernel_packed_key->key_offset + kernel_packed_key->key_size; + dst_packed_key = vb2_workbuf_alloc(&wb, kernel_packed_key_size); + if (!dst_packed_key) + return VB2_ERROR_WORKBUF_SMALL; + + /* Copy the packed key data into the workbuf. */ + memcpy(dst_packed_key, kernel_packed_key_data, kernel_packed_key_size); + + /* Set the location of the kernel key data in the context. */ + sd->kernel_key_offset = vb2_offset_of(sd, dst_packed_key); + sd->kernel_key_size = kernel_packed_key_size; + + vb2_set_workbuf_used(ctx, + sd->kernel_key_offset + kernel_packed_key_size); + + return VB2_SUCCESS; +} + vb2_error_t vb2api_fw_phase1(struct vb2_context *ctx) { vb2_error_t rv; |