security: remediate Track C findings

crates/januskey-cli/src/keys.rs

@@ -531,7 +531,7 @@ impl KeyManager {
 
     fn load_store_raw(&self) -> Result<KeyStoreData> {
         let path = self.store_path.join("keystore.jks");
-        let content = fs::read_to_string(&path)?;
+        let content = ({ use std::io::Read; std::fs::File::open(&path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
         let store: KeyStoreData = serde_json::from_str(&content)?;
         Ok(store)
     }

crates/januskey-cli/src/lib.rs

@@ -78,7 +78,7 @@ impl Config {
     pub fn load(dir: &std::path::Path) -> Self {
         let config_path = dir.join(".januskey").join("config.json");
         if config_path.exists() {
-            if let Ok(content) = std::fs::read_to_string(&config_path) {
+            if let Ok(content) = ({ use std::io::Read; std::fs::File::open(&config_path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }) {
                 if let Ok(config) = serde_json::from_str(&content) {
                     return config;
                 }

crates/januskey-cli/src/main.rs

@@ -392,7 +392,7 @@ fn cmd_modify(
     // Preview changes
     let mut changes = Vec::new();
     for file in &files {
-        let content = fs::read_to_string(file)?;
+        let content = ({ use std::io::Read; std::fs::File::open(file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
         let new_content = if global {
             content.replace(&search, &replace)
         } else {

crates/januskey-cli/src/obliteration.rs

@@ -146,7 +146,7 @@ impl ObliterationManager {
     /// Create or open an obliteration manager
     pub fn new(log_path: PathBuf) -> Result<Self> {
         let log = if log_path.exists() {
-            let content = fs::read_to_string(&log_path)?;
+            let content = ({ use std::io::Read; std::fs::File::open(&log_path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
             serde_json::from_str(&content)
                 .map_err(|e| JanusError::MetadataCorrupted(e.to_string()))?
         } else {

crates/januskey-cli/src/operations.rs

@@ -513,7 +513,7 @@ mod tests {
         executor.undo(&delete_meta.id).unwrap();
 
         assert!(test_file.exists());
-        assert_eq!(fs::read_to_string(&test_file).unwrap(), "hello world");
+        assert_eq!(({ use std::io::Read; std::fs::File::open(&test_file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).unwrap(), "hello world");
     }
 
     #[test]
@@ -533,13 +533,13 @@ mod tests {
             })
             .unwrap();
 
-        assert_eq!(fs::read_to_string(&test_file).unwrap(), "modified content");
+        assert_eq!(({ use std::io::Read; std::fs::File::open(&test_file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).unwrap(), "modified content");
 
         // Undo the modify
         let mut executor = OperationExecutor::new(&content_store, &mut metadata_store);
         executor.undo(&modify_meta.id).unwrap();
 
-        assert_eq!(fs::read_to_string(&test_file).unwrap(), "original content");
+        assert_eq!(({ use std::io::Read; std::fs::File::open(&test_file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).unwrap(), "original content");
     }
 
     #[test]

crates/januskey-cli/tests/aspect_test.rs

@@ -134,7 +134,7 @@ fn obliterated_key_record_marked_revoked() {
 
     // Verify key record reflects revocation
     let key_content =
-        fs::read_to_string(base.join(".jk/keys").join(format!("{}.json", key_id)))
+        ({ use std::io::Read; std::fs::File::open(base.join(".jk/keys").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).join(format!("{}.json", key_id)))
             .expect("Read key record");
     assert!(
         key_content.contains("revoked"),

crates/januskey-cli/tests/concurrency_test.rs

@@ -164,7 +164,7 @@ fn transaction_isolation_uncommitted_invisible() {
 
     // Reader may see the file (filesystem is not transactional),
     // but we verify the transaction itself is still "active" not "committed"
-    let tx_read = fs::read_to_string(base.join(".jk/transactions/001.json"))
+    let tx_read = ({ use std::io::Read; std::fs::File::open(base.join(".jk/transactions/001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }))
         .expect("Read transaction");
     assert!(
         tx_read.contains("\"active\""),
@@ -404,7 +404,7 @@ fn concurrent_commit_rollback_no_corruption() {
     // Verify each transaction is in a valid terminal state
     for entry in fs::read_dir(base.join(".jk/transactions")).expect("Read dir") {
         let entry = entry.expect("Dir entry");
-        let content = fs::read_to_string(entry.path()).expect("Read tx file");
+        let content = ({ use std::io::Read; std::fs::File::open(entry.path().and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })).expect("Read tx file");
         let is_valid = content.contains("\"committed\"") || content.contains("\"rolled_back\"");
         assert!(
             is_valid,

crates/januskey-cli/tests/e2e_test.rs

@@ -81,13 +81,13 @@ fn full_key_lifecycle_single_key() {
     assert_eq!(retrieved, key_material, "Retrieved content must match original");
 
     // Step 5: Verify attestation references the key
-    let attest_read = fs::read_to_string(base.join(".jk/attestation/0001.json"))
+    let attest_read = ({ use std::io::Read; std::fs::File::open(base.join(".jk/attestation/0001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }))
         .expect("Read attestation");
     assert!(attest_read.contains(key_id), "Attestation must contain key ID");
     assert!(attest_read.contains(&key_hash), "Attestation must contain content hash");
 
     // Verify key record exists
-    let key_read = fs::read_to_string(base.join(".jk/keys/001.json"))
+    let key_read = ({ use std::io::Read; std::fs::File::open(base.join(".jk/keys/001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }))
         .expect("Read key record");
     assert!(key_read.contains(key_id), "Key record must contain ID");
 }
@@ -167,7 +167,7 @@ fn full_key_lifecycle_multi_key_transaction() {
 
     // Verify transaction is committed
     let tx_read =
-        fs::read_to_string(base.join(".jk/transactions/001.json")).expect("Read tx");
+        ({ use std::io::Read; std::fs::File::open(base.join(".jk/transactions/001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })).expect("Read tx");
     assert!(tx_read.contains("committed"), "Transaction must be committed");
 }
 
@@ -359,7 +359,7 @@ fn corrupted_attestation_entry_detected() {
         .expect("Write malformed entry");
 
     // Attempt to read and parse
-    let read_result = fs::read_to_string(base.join(".jk/attestation/0001.json"))
+    let read_result = ({ use std::io::Read; std::fs::File::open(base.join(".jk/attestation/0001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }))
         .expect("Read file");
     let parse_result = serde_json::from_str::<serde_json::Value>(&read_result);
 

crates/januskey-cli/tests/p2p_test.rs

@@ -101,7 +101,7 @@ fn key_operation_creates_attestation_entry() {
     std::fs::write(attest_path.join("0001.json"), &entry).unwrap();
 
     // Verify attestation references the key
-    let read_back = std::fs::read_to_string(attest_path.join("0001.json")).unwrap();
+    let read_back = ({ use std::io::Read; std::fs::File::open(attest_path.join("0001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })).unwrap();
     assert!(
         read_back.contains(key_id),
         "Attestation must reference key ID"
@@ -132,7 +132,7 @@ fn attestation_chain_integrity() {
 
     // Verify chain: each entry's content hashes to the next's prev_hash
     let entries: Vec<String> = (0..3)
-        .map(|i| std::fs::read_to_string(attest_path.join(format!("{:04}.json", i))).unwrap())
+        .map(|i| ({ use std::io::Read; std::fs::File::open(attest_path.join(format!("{:04}.json", i).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }))).unwrap())
         .collect();
 
     for i in 1..entries.len() {

crates/reversible-core/src/metadata.rs

@@ -256,7 +256,7 @@ impl MetadataStore {
     /// Create or open a metadata store
     pub fn new(path: PathBuf) -> Result<Self> {
         let log = if path.exists() {
-            let content = fs::read_to_string(&path)?;
+            let content = ({ use std::io::Read; std::fs::File::open(&path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
             serde_json::from_str(&content)
                 .map_err(|e| ReversibleError::MetadataCorrupted(e.to_string()))?
         } else {

crates/reversible-core/src/transaction.rs

@@ -121,7 +121,7 @@ impl TransactionManager {
     /// Create or open a transaction manager
     pub fn new(path: PathBuf) -> Result<Self> {
         let log = if path.exists() {
-            let content = fs::read_to_string(&path)?;
+            let content = ({ use std::io::Read; std::fs::File::open(&path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
             serde_json::from_str(&content)
                 .map_err(|e| ReversibleError::MetadataCorrupted(e.to_string()))?
         } else {

src/januskey/src/keys.rs

@@ -531,7 +531,7 @@ impl KeyManager {
 
     fn load_store_raw(&self) -> Result<KeyStoreData> {
         let path = self.store_path.join("keystore.jks");
-        let content = fs::read_to_string(&path)?;
+        let content = ({ use std::io::Read; std::fs::File::open(&path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
         let store: KeyStoreData = serde_json::from_str(&content)?;
         Ok(store)
     }

src/januskey/src/lib.rs

@@ -61,7 +61,7 @@ impl Config {
     pub fn load(dir: &std::path::Path) -> Self {
         let config_path = dir.join(".januskey").join("config.json");
         if config_path.exists() {
-            if let Ok(content) = std::fs::read_to_string(&config_path) {
+            if let Ok(content) = ({ use std::io::Read; std::fs::File::open(&config_path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }) {
                 if let Ok(config) = serde_json::from_str(&content) {
                     return config;
                 }

src/januskey/src/main.rs

@@ -370,7 +370,7 @@ fn cmd_modify(
     // Preview changes
     let mut changes = Vec::new();
     for file in &files {
-        let content = fs::read_to_string(file)?;
+        let content = ({ use std::io::Read; std::fs::File::open(file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
         let new_content = if global {
             content.replace(&search, &replace)
         } else {

src/januskey/src/metadata.rs

@@ -224,7 +224,7 @@ impl MetadataStore {
     /// Create or open a metadata store
     pub fn new(path: PathBuf) -> Result<Self> {
         let log = if path.exists() {
-            let content = fs::read_to_string(&path)?;
+            let content = ({ use std::io::Read; std::fs::File::open(&path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
             serde_json::from_str(&content).map_err(|e| JanusError::MetadataCorrupted(e.to_string()))?
         } else {
             OperationLog::default()

src/januskey/src/obliteration.rs

@@ -146,7 +146,7 @@ impl ObliterationManager {
     /// Create or open an obliteration manager
     pub fn new(log_path: PathBuf) -> Result<Self> {
         let log = if log_path.exists() {
-            let content = fs::read_to_string(&log_path)?;
+            let content = ({ use std::io::Read; std::fs::File::open(&log_path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
             serde_json::from_str(&content)
                 .map_err(|e| JanusError::MetadataCorrupted(e.to_string()))?
         } else {

src/januskey/src/operations.rs

@@ -513,7 +513,7 @@ mod tests {
         executor.undo(&delete_meta.id).unwrap();
 
         assert!(test_file.exists());
-        assert_eq!(fs::read_to_string(&test_file).unwrap(), "hello world");
+        assert_eq!(({ use std::io::Read; std::fs::File::open(&test_file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).unwrap(), "hello world");
     }
 
     #[test]
@@ -533,13 +533,13 @@ mod tests {
             })
             .unwrap();
 
-        assert_eq!(fs::read_to_string(&test_file).unwrap(), "modified content");
+        assert_eq!(({ use std::io::Read; std::fs::File::open(&test_file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).unwrap(), "modified content");
 
         // Undo the modify
         let mut executor = OperationExecutor::new(&content_store, &mut metadata_store);
         executor.undo(&modify_meta.id).unwrap();
 
-        assert_eq!(fs::read_to_string(&test_file).unwrap(), "original content");
+        assert_eq!(({ use std::io::Read; std::fs::File::open(&test_file).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }).unwrap(), "original content");
     }
 
     #[test]

src/januskey/src/transaction.rs

@@ -112,7 +112,7 @@ impl TransactionManager {
     /// Create or open a transaction manager
     pub fn new(path: PathBuf) -> Result<Self> {
         let log = if path.exists() {
-            let content = fs::read_to_string(&path)?;
+            let content = ({ use std::io::Read; std::fs::File::open(&path).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })?;
             serde_json::from_str(&content)
                 .map_err(|e| JanusError::MetadataCorrupted(e.to_string()))?
         } else {

tests/p2p/component_p2p_test.rs

@@ -82,7 +82,7 @@ mod p2p_tests {
         std::fs::write(attest_path.join("0001.json"), &entry).unwrap();
 
         // Verify attestation references the key
-        let read_back = std::fs::read_to_string(attest_path.join("0001.json")).unwrap();
+        let read_back = ({ use std::io::Read; std::fs::File::open(attest_path.join("0001.json").and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) })).unwrap();
         assert!(read_back.contains(key_id), "Attestation must reference key ID");
     }
 
@@ -108,7 +108,7 @@ mod p2p_tests {
         // Verify chain: each entry's content hashes to the next's prev_hash
         let entries: Vec<String> = (0..3)
             .map(|i| {
-                std::fs::read_to_string(attest_path.join(format!("{:04}.json", i))).unwrap()
+                ({ use std::io::Read; std::fs::File::open(attest_path.join(format!("{:04}.json", i).and_then(|mut f| { let mut buf = String::new(); f.take(10 * 1024 * 1024).read_to_string(&mut buf)?; Ok(buf) }) }))).unwrap()
             })
             .collect();