Bugfix for hash generation of non utf8 files

src/rsnmplib/filesum.rs

@@ -8,9 +8,9 @@ use std::path::Path;
 
 pub(crate) fn filesum_filtered(
     path: &Path,
-    oldfile: &mut String,
+    oldfile: &mut Vec<u8>,
     diff_string: &mut String,
-    re: Option<&regex::Regex>,
+    re: Option<&regex::bytes::Regex>,
 ) -> io::Result<(bool, String)> {
     // Open file for hashing
     match re {
@@ -18,30 +18,37 @@ pub(crate) fn filesum_filtered(
         None => trace!("try to open file {:?} for hashing", path),
     }
     let mut hasher = Sha3_256::new();
-    let mut filedata = String::with_capacity(2048);
+    let mut filedata = Vec::with_capacity(2048);
     let mut changed = false;
 
     // we read only smal files, so its fast to read the whole file to memory, so we can also du a diff
-    if let Ok(file_contents) = fs::read_to_string(path) {
+    if let Ok(file_contents) = fs::read(path) {
         if let Some(re) = re {
             trace!("Filter lines with regex {:?}", re);
-            for line in file_contents.lines() {
+            for line in file_contents.split_inclusive(|&b| b == b'\n') {
                 if re.is_match(line) {
-                    trace!("line {} skipped by filter regex", line);
+                    trace!("line {} skipped by filter regex", String::from_utf8_lossy(line).trim());
                     continue;
                 }
                 // Update the hasher with the bytes
-                filedata.push_str(line);
+                filedata.extend_from_slice(line);
             }
         } else {
             // we do not have a filter regex, so we could simply paste the file to the hasher
             trace!("Hash file without filter regex");
             filedata = file_contents;
         }
-        hasher.update(format!("{}\n", filedata).as_bytes());
+
+        // Debug to find errors
+        //trace!("Hasher input data {:?}",String::from_utf8_lossy(&filedata));
+
+        // Update the hasher with the bytes
+        hasher.update(&filedata);
         if !oldfile.is_empty() && *oldfile != filedata {
             diff_string.clear();
-            for diff in diff::lines(oldfile, &filedata) {
+            let ofs = String::from_utf8_lossy(oldfile);
+            let nfs = String::from_utf8_lossy(&filedata);
+            for diff in diff::lines(&ofs, &nfs) {
                 match diff {
                     Result::Left(l) => {
                         trace!("Diff - {}", l); // Removed line

src/rsnmplib/helper.rs

@@ -1,5 +1,6 @@
 use log::{debug, error, info};
 use regex::Regex;
+use regex::bytes::Regex as BRegex;
 
 pub(crate) fn compile_re(regex: Option<String>, name: &str) -> Option<Regex> {
     if let Some(r) = regex {
@@ -19,3 +20,22 @@ pub(crate) fn compile_re(regex: Option<String>, name: &str) -> Option<Regex> {
         None
     }
 }
+
+pub(crate) fn compile_re_bin(regex: Option<String>, name: &str) -> Option<BRegex> {
+    if let Some(r) = regex {
+        let re = BRegex::new(&r);
+        match re {
+            Ok(r) => {
+                debug!("Sucessfull compiled {} filter regex: {:?}", name, r);
+                Some(r)
+            }
+            Err(e) => {
+                error!("Error compiling {} filter regex: {:?}", name, e);
+                None
+            }
+        }
+    } else {
+        info!("No filter regex for {} supplied", name);
+        None
+    }
+}

src/rsnmplib/mod.rs

@@ -19,7 +19,7 @@ pub mod snmp;
 use bonding::bonding_status;
 use config::DataFunctionsFilesum;
 use filesum::filesum_filtered;
-use helper::compile_re;
+use helper::{compile_re, compile_re_bin};
 use multipath::multipath_status;
 use processes::Ptypes;
 use snmp::{Oid, OidData, SnmpData};
@@ -189,10 +189,10 @@ fn t_filesum(
     #[cfg(target_os = "linux")]
     {
         // allocate some strings for holding file contents between check runs
-        let mut oldpasswd = String::with_capacity(2048);
+        let mut oldpasswd = Vec::with_capacity(2048);
-        let mut oldshadow = String::with_capacity(2048);
+        let mut oldshadow = Vec::with_capacity(2048);
-        let mut oldgroup = String::with_capacity(2048);
+        let mut oldgroup = Vec::with_capacity(2048);
-        let mut oldauthkey = String::with_capacity(2048);
+        let mut oldauthkey = Vec::with_capacity(2048);
         let mut hash_passwd = String::with_capacity(128);
         let mut diff_passwd = String::with_capacity(2048);
         let mut hash_shadow = String::with_capacity(128);
@@ -203,10 +203,10 @@ fn t_filesum(
         let mut diff_authkey = String::with_capacity(2048);
 
         // allocate Option<Regex> for our regex ...
-        let re_passwd = compile_re(options.passwd, "passwd");
+        let re_passwd = compile_re_bin(options.passwd, "passwd");
-        let re_shadow = compile_re(options.shadow, "shadow");
+        let re_shadow = compile_re_bin(options.shadow, "shadow");
-        let re_group = compile_re(options.group, "group");
+        let re_group = compile_re_bin(options.group, "group");
-        let re_authkey = compile_re(options.authorized_keys, "authorized_keys");
+        let re_authkey = compile_re_bin(options.authorized_keys, "authorized_keys");
 
         // prepare variables which we use in the whole function
         let oid_filesum_time = Oid::from_str("6.1.0").unwrap();

src/rsnmplib/snmp.rs

@@ -49,7 +49,7 @@ impl Oid {
         x
     }
 
-/*     pub fn add_suffix(&self, o: &Oid) -> Oid {
+    /*     pub fn add_suffix(&self, o: &Oid) -> Oid {
         let mut x = self.clone();
         x.0.extend(o.clone().0);
         x