fde: change content of load_config aael from a json object to hex hash value

Signed-off-by: Kun Lai <[email protected]>

Author: imlk0

docs/configuration.md

@@ -98,7 +98,7 @@ After entering the system, you can check the EventLog recorded by CryptPilot via
 ```txt
 # cat /run/attestation-agent/eventlog
 INIT sha384/000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-cryptpilot.alibabacloud.com load_config {"alg":"sha384","value":"b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877"}
+cryptpilot.alibabacloud.com load_config b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877
 cryptpilot.alibabacloud.com fde_rootfs_hash a3f73f5b995e7d8915c998d9f1e56b0e063a6e20c2bbb512e88e8fbc4e8f2965
 cryptpilot.alibabacloud.com initrd_switch_root {}
 ```
@@ -107,7 +107,7 @@ As shown above, three EventLogs will be recorded during the CryptPilot startup p
 
 | Domain | Operation | Example Value | Description |
 | --- | --- | --- | --- |
-| cryptpilot.alibabacloud.com | load_config | `{"alg":"sha384","value":"b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877"}` | The hash value of the configuration file used by CryptPilot |
+| cryptpilot.alibabacloud.com | load_config | `b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877` | The SHA384 hash value of the configuration file used by CryptPilot |
 | cryptpilot.alibabacloud.com | fde_rootfs_hash | `a3f73f5b995e7d8915c998d9f1e56b0e063a6e20c2bbb512e88e8fbc4e8f2965` | The measurement value of the decrypted rootfs volume |
 | cryptpilot.alibabacloud.com | initrd_switch_root | `{}` | An event record indicating that the system has switched from the initrd phase to the real system. The value of this item is always `{}` |
 

docs/configuration_zh.md

@@ -98,7 +98,7 @@ CryptPilot使用远程证明（Remote Attestation）技术来实现对根文件
 ```txt
 # cat /run/attestation-agent/eventlog
 INIT sha384/000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-cryptpilot.alibabacloud.com load_config {"alg":"sha384","value":"b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877"}
+cryptpilot.alibabacloud.com load_config b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877
 cryptpilot.alibabacloud.com fde_rootfs_hash a3f73f5b995e7d8915c998d9f1e56b0e063a6e20c2bbb512e88e8fbc4e8f2965
 cryptpilot.alibabacloud.com initrd_switch_root {}
 ```
@@ -107,7 +107,7 @@ cryptpilot.alibabacloud.com initrd_switch_root {}
 
 | Domain | Operation | 示例值 | 描述 |
 | --- | --- | --- | --- |
-| cryptpilot.alibabacloud.com | load_config | `{"alg":"sha384","value":"b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877"}` | CryptPilot所使用的配置文件的hash值 |
+| cryptpilot.alibabacloud.com | load_config | `b8635580d85cb0a2b5896664eb795cadb99a589783817c81e263f6752f2a735d2705b4638947de3d947231b76b5a1877` | CryptPilot所使用的配置文件的SHA384值 |
 | cryptpilot.alibabacloud.com | fde_rootfs_hash | `a3f73f5b995e7d8915c998d9f1e56b0e063a6e20c2bbb512e88e8fbc4e8f2965` | 解密后启动的rootfs卷的度量值 |
 | cryptpilot.alibabacloud.com | initrd_switch_root | `{}` | 一个事件记录，用于标识系统当前已经从initrd阶段切换到真实的系统中，该项的值始终为`{}` |
 

src/measure/mod.rs

@@ -2,7 +2,6 @@
 pub mod attestation_agent;
 
 use anyhow::Result;
-use serde_json::json;
 use sha2::Digest;
 
 pub const OPERATION_NAME_LOAD_CONFIG: &str = "load_config";
@@ -29,12 +28,7 @@ pub trait Measure {
             .finalize()
             .to_vec();
 
-        let hash = json! ({
-            "alg": "sha384",
-            "value": hex::encode(hash),
-        });
-
-        Ok(hash.to_string())
+        Ok(hex::encode(hash))
     }
 }