commit b290dc26ffc3b8fcffdb7f370838fa7a198159a4
parent cc79208a8ce2242a74b4e00ac2841520c5b044d3
Author: Jared Tobin <jared@jtobin.ca>
Date: Sat, 17 Dec 2016 13:22:24 +1300
S1C5.
Diffstat:
| A | src/s1c5.rs | | | 40 | ++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 40 insertions(+), 0 deletions(-)
diff --git a/src/s1c5.rs b/src/s1c5.rs
@@ -0,0 +1,40 @@
+extern crate rustc_serialize as serialize;
+
+use serialize::hex::{ToHex};
+use std::vec::Vec;
+
+const STRING: &'static str =
+ "Burning 'em, if you ain't quick and nimble\n\
+ I go crazy when I hear a cymbal";
+
+fn repeating_key_xor(text: &str, key: &str) -> String {
+ let text_bytes = text.as_bytes();
+ let key_bytes = key.as_bytes();
+
+ let mut xored: Vec<u8> = vec![0; text_bytes.len()];
+
+ for (idx, val) in text_bytes.iter().enumerate() {
+ let byte_idx = idx % key_bytes.len();
+ xored[idx] = val ^ key_bytes[byte_idx];
+ }
+
+ xored.to_hex()
+}
+
+fn main() {
+ println!("{}", STRING);
+ println!("{}", repeating_key_xor(STRING, "ICE"));
+}
+
+// to read from stdin:
+//
+// use std::io::{self, Read};
+//
+// let mut buffer = String::new();
+//
+// io::stdin().read_to_string(&mut buffer)
+// .expect("Couldn't read.");
+//
+// println!("{}", &buffer);
+// println!("{}", repeating_key_xor(&buffer, "ICE"));
+
