File.Replace_all impl, test, doc.

docs/_docs/user-guide/eldritch.md

@@ -72,7 +72,7 @@ The <b>file.replace</b> method is very cool, and will be even cooler when Nick d
 ### file.replace_all
 `file.replace_all(path: str, pattern: str, value:` str) -> None
 
-The <b>file.replace_all</b> method is very cool, and will be even cooler when Nick documents it.
+The <b>file.replace_all</b> method finds all strings matching a regex pattern in the specified file and replaces them with the value.
 
 ### file.timestomp
 `file.timestomp(src: str, dst: str) -> None`

implants/eldritch/Cargo.toml

@@ -9,5 +9,6 @@ tempfile = "3.3.0"
 anyhow = "1.0.55"
 derive_more = "0.99.17"
 sha256 = "1.0.3"
+regex = "1.5.5"
 reqwest = { version = "0.11.0" , features = ["blocking"] }
-httptest = "0.15.4"
+httptest = "0.15.4"

implants/eldritch/src/file/replace_all_impl.rs

@@ -1,5 +1,58 @@
 use anyhow::Result;
+use std::fs::{write,read_to_string};
+use regex::{Regex,NoExpand};
+
+pub fn replace_all(path: String, pattern: String, value: String) -> Result<()> {
+    let file_contents = read_to_string(path.clone()).unwrap();
+    let re = Regex::new(&pattern).unwrap();
+    let result = re.replace_all(&file_contents, NoExpand(&value));
+    write(path, String::from(result))?;
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::{NamedTempFile};
+
+    #[test]
+    fn test_replace_all_multiline() -> anyhow::Result<()>{
+        let tmp_file_new = NamedTempFile::new()?;
+        let path_new = String::from(tmp_file_new.path().to_str().unwrap()).clone();
+        let _ = write(path_new.clone(),"Match User anoncvs\nMatch User anoncvs\nMatch User anoncvs\n");
+
+        // Run our code
+        replace_all(path_new.clone(), String::from("Match"), String::from("Not Match"))?;
+
+        let res = read_to_string(path_new)?;
+        assert_eq!(res, "Not Match User anoncvs\n".repeat(3));
+        Ok(())
+    }
+    #[test]
+    fn test_replace_all_regex_simple() -> anyhow::Result<()>{
+        let tmp_file_new = NamedTempFile::new()?;
+        let path_new = String::from(tmp_file_new.path().to_str().unwrap()).clone();
+        let _ = write(path_new.clone(),"Match User anoncvs\nMatch User anoncvs\nMatch User anoncvs\n");
+
+        // Run our code
+        replace_all(path_new.clone(), String::from(r".*Match.*"), String::from("Not Match"))?;
+
+        let res = read_to_string(path_new)?;
+        assert_eq!(res, "Not Match\n".repeat(3));
+        Ok(())
+    }
+    #[test]
+    fn test_replace_all_regex_complex() -> anyhow::Result<()>{
+        let tmp_file_new = NamedTempFile::new()?;
+        let path_new = String::from(tmp_file_new.path().to_str().unwrap()).clone();
+        let _ = write(path_new.clone(),"MaxStartups 10:30:100\nListenAddress 0.0.0.0\nMaxAuthTries 6\nMatch User anoncvs\n");
+
+        // Run our code
+        replace_all(path_new.clone(), String::from(r"\d\.\d\.\d\.\d"), String::from("127.0.0.1"))?;
+
+        let res = read_to_string(path_new)?;
+        assert_eq!(res, "MaxStartups 10:30:100\nListenAddress 127.0.0.1\nMaxAuthTries 6\nMatch User anoncvs\n");
+        Ok(())
+    }
 
-pub fn replace_all(_path: String, _pattern: String, _value: String) -> Result<()> {
-    unimplemented!("Method unimplemented")
 }