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-rw-r--r--2015/rs/code/four/src/main.rs46
1 files changed, 46 insertions, 0 deletions
diff --git a/2015/rs/code/four/src/main.rs b/2015/rs/code/four/src/main.rs
new file mode 100644
index 0000000..177ddc5
--- /dev/null
+++ b/2015/rs/code/four/src/main.rs
@@ -0,0 +1,46 @@
+use md5::{Digest, Md5};
+use std::fmt::Write;
+use std::io::Write as WriteI;
+
+static INPUT: &'static [u8] = b"yzbqklnj";
+
+fn main() {
+ let mut buf = Vec::with_capacity(INPUT.len() + 10);
+ buf.extend_from_slice(INPUT);
+
+ for i in 0.. {
+ if i % 1000 == 0 { print!("{i}\r"); std::io::stdout().flush(); }
+
+ let mut hasher = Md5::new();
+ write!(&mut buf, "{i}");
+ hasher.update(buf.as_slice());
+ let hash = hasher.finalize();
+ if hash.starts_with(&[0, 0]) && hash[2] < 16 {
+ let mut hexhash = String::with_capacity(32);
+ for digit in hash {
+ write!(&mut hexhash, "{digit:02x}");
+ }
+ println!("Got 5 digit hash: {hexhash}, at {i}");
+ break;
+ }
+ buf.truncate(INPUT.len());
+ }
+
+ for i in 0.. {
+ if i % 1000 == 0 { print!("{i}\r"); std::io::stdout().flush(); }
+
+ let mut hasher = Md5::new();
+ write!(&mut buf, "{i}");
+ hasher.update(buf.as_slice());
+ let hash = hasher.finalize();
+ if hash.starts_with(&[0, 0, 0]) {
+ let mut hexhash = String::with_capacity(32);
+ for digit in hash {
+ write!(&mut hexhash, "{digit:02x}");
+ }
+ println!("Got 6 digit hash: {hexhash}, at {i}");
+ break;
+ }
+ buf.truncate(INPUT.len());
+ }
+}