3 files changed, 117 insertions, 0 deletions
diff --git a/Cargo.lock b/Cargo.lock
index 2a3d212..8917828 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,4 +1,81 @@
 [root]
 name = "aoc"
 version = "0.1.0"
+dependencies = [
+ "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
+[[package]]
+name = "gcc"
+version = "0.3.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+name = "rand"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rust-crypto"
+version = "0.2.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+ "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rustc-serialize"
+version = "0.3.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "time"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum gcc 0.3.39 (registry+https://github.com/rust-lang/crates.io-index)" = "771e4a97ff6f237cf0f7d5f5102f6e28bb9743814b6198d684da5c58b76c11e0"
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+"checksum libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "a51822fc847e7a8101514d1d44e354ba2ffa7d4c194dcab48870740e327cac70"
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+"checksum rustc-serialize 0.3.21 (registry+https://github.com/rust-lang/crates.io-index)" = "bff9fc1c79f2dec76b253273d07682e94a978bd8f132ded071188122b2af9818"
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diff --git a/input/day05.txt b/input/day05.txt
new file mode 100644
index 0000000..a9c42a4
--- /dev/null
+++ b/input/day05.txt
@@ -0,0 +1 @@
+reyedfim
diff --git a/src/bin/day05.rs b/src/bin/day05.rs
new file mode 100644
index 0000000..a860e53
--- /dev/null
+++ b/src/bin/day05.rs
@@ -0,0 +1,39 @@
+extern crate crypto;
+
+use std::io::{self, Read};
+
+use crypto::digest::Digest;
+use crypto::md5::Md5;
+
+fn solve(input: &str) -> String {
+    let mut password = String::new();
+    let mut index = 0u64;
+
+    while password.len() < 8 {
+        let mut md5 = Md5::new();
+        md5.input_str(input);
+        md5.input_str(&index.to_string());
+        let digest = md5.result_str();
+
+        if &digest[0..5] == "00000" {
+            password.push_str(&digest[5..6]);
+        }
+
+        index += 1;
+    }
+
+    password
+}
+
+fn main() {
+    let mut input = String::new();
+    io::stdin().read_to_string(&mut input).unwrap();
+
+    println!("Part 1: {}", solve(input.trim()));
+}
+
+#[test]
+#[ignore]
+fn part1() {
+    assert_eq!("18f47a30", solve("abc"));
+}