fix(tpm): correctly write the log name, and change the sprout configuration event name

Author: azenla

src/config/loader.rs

@@ -24,8 +24,12 @@ fn load_raw_config(options: &SproutOptions) -> Result<Vec<u8>> {
         .context("unable to read sprout config file")?;
 
     // Measure the sprout.toml into the TPM, if needed and possible.
-    PlatformTpm::log_event(PlatformTpm::PCR_BOOT_LOADER_CONFIG, &content, "sprout.toml")
-        .context("unable to measure the sprout.toml file into the TPM")?;
+    PlatformTpm::log_event(
+        PlatformTpm::PCR_BOOT_LOADER_CONFIG,
+        &content,
+        "sprout: configuration file",
+    )
+    .context("unable to measure the sprout.toml file into the TPM")?;
 
     // Return the contents of the sprout config file.
     Ok(content)

src/platform/tpm.rs

@@ -1,5 +1,6 @@
 use crate::utils;
 use anyhow::{Context, Result};
+use uefi::ResultExt;
 use uefi::boot::ScopedProtocol;
 use uefi::proto::tcg::PcrIndex;
 use uefi::proto::tcg::v2::{PcrEventInputs, Tcg};
@@ -110,13 +111,11 @@ impl PlatformTpm {
         };
 
         // Encode the description as a UTF-16 little endian string.
-        let description = description
-            .encode_utf16()
-            .flat_map(|c| c.to_le_bytes())
-            .collect::<Vec<u8>>();
+        let description = description.as_bytes().to_vec();
 
         // Construct an event input for the TPM.
         let event = PcrEventInputs::new_in_box(pcr_index, EventType::IPL, &description)
+            .discard_errdata()
             .context("unable to construct pcr event inputs")?;
 
         // Log the event into the TPM.