[dice] Add BccHandoverMainFlow wrapper to diced_open_dice
As a step of merging the existing diced_open_dice_cbor library into
the new open-dice wrapper diced_open_dice.
This API will be used in pvmfw later.
Bug: 267575445
Test: atest diced_utils_test diced_sample_inputs_test \
diced_vendor_test diced_open_dice_cbor_test \
libdiced_open_dice_nostd.integration_test \
libdiced_open_dice.integration_test diced_open_dice_cbor_test
Change-Id: I7f2525bfa8452e0ad98cfcea6f83657a164dcb6b
diff --git a/diced/open_dice/src/bcc.rs b/diced/open_dice/src/bcc.rs
index e3a96fe..3e48215 100644
--- a/diced/open_dice/src/bcc.rs
+++ b/diced/open_dice/src/bcc.rs
@@ -17,8 +17,8 @@
use crate::dice::{Cdi, CdiValues, InputValues};
use crate::error::{check_result, Result};
use open_dice_bcc_bindgen::{
- BccConfigValues, BccFormatConfigDescriptor, BccMainFlow, BCC_INPUT_COMPONENT_NAME,
- BCC_INPUT_COMPONENT_VERSION, BCC_INPUT_RESETTABLE,
+ BccConfigValues, BccFormatConfigDescriptor, BccHandoverMainFlow, BccMainFlow,
+ BCC_INPUT_COMPONENT_NAME, BCC_INPUT_COMPONENT_VERSION, BCC_INPUT_RESETTABLE,
};
use std::{ffi::CStr, ptr};
@@ -90,3 +90,33 @@
})?;
Ok(next_bcc_size)
}
+
+/// Executes the main BCC handover flow.
+///
+/// A BCC handover combines the BCC and CDIs in a single CBOR object.
+/// This function takes the current boot stage's BCC handover bundle and produces a
+/// bundle for the next stage.
+pub fn bcc_handover_main_flow(
+ current_bcc_handover: &[u8],
+ input_values: &InputValues,
+ next_bcc_handover: &mut [u8],
+) -> Result<usize> {
+ let mut next_bcc_handover_size = 0;
+ // SAFETY - The function only reads `current_bcc_handover` and writes to `next_bcc_handover`
+ // within its bounds,
+ // It also reads `input_values` as a constant input and doesn't store any pointer.
+ // The first argument can be null and is not used in the current implementation.
+ check_result(unsafe {
+ BccHandoverMainFlow(
+ ptr::null_mut(), // context
+ current_bcc_handover.as_ptr(),
+ current_bcc_handover.len(),
+ input_values.as_ptr(),
+ next_bcc_handover.len(),
+ next_bcc_handover.as_mut_ptr(),
+ &mut next_bcc_handover_size,
+ )
+ })?;
+
+ Ok(next_bcc_handover_size)
+}