1 files changed, 97 insertions, 0 deletions
diff --git a/third_party/rust/rust-argon2/src/version.rs b/third_party/rust/rust-argon2/src/version.rs
new file mode 100644
index 0000000000..b8c03ba918
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+++ b/third_party/rust/rust-argon2/src/version.rs
@@ -0,0 +1,97 @@
+// Copyright (c) 2017 Martijn Rijkeboer <mrr@sru-systems.com>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::fmt;
+use super::error::Error;
+use super::result::Result;
+
+/// The Argon2 version.
+#[derive(Clone, Copy, Debug, Eq, PartialEq, PartialOrd, Ord)]
+pub enum Version {
+    /// Version 0x10.
+    Version10 = 0x10,
+
+    /// Version 0x13 (Recommended).
+    Version13 = 0x13,
+}
+
+impl Version {
+    /// Gets the u32 representation of the version.
+    pub fn as_u32(&self) -> u32 {
+        *self as u32
+    }
+
+    /// Attempts to create a version from a string slice.
+    pub fn from_str(str: &str) -> Result<Version> {
+        match str {
+            "16" => Ok(Version::Version10),
+            "19" => Ok(Version::Version13),
+            _ => Err(Error::DecodingFail),
+        }
+    }
+
+    /// Attempts to create a version from an u32.
+    pub fn from_u32(val: u32) -> Result<Version> {
+        match val {
+            0x10 => Ok(Version::Version10),
+            0x13 => Ok(Version::Version13),
+            _ => Err(Error::IncorrectVersion),
+        }
+    }
+}
+
+impl Default for Version {
+    fn default() -> Version {
+        Version::Version13
+    }
+}
+
+impl fmt::Display for Version {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.as_u32())
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+
+    use error::Error;
+    use super::*;
+
+    #[test]
+    fn as_u32_returns_correct_u32() {
+        assert_eq!(Version::Version10.as_u32(), 0x10);
+        assert_eq!(Version::Version13.as_u32(), 0x13);
+    }
+
+    #[test]
+    fn default_returns_correct_version() {
+        assert_eq!(Version::default(), Version::Version13);
+    }
+
+    #[test]
+    fn display_returns_correct_string() {
+        assert_eq!(format!("{}", Version::Version10), "16");
+        assert_eq!(format!("{}", Version::Version13), "19");
+    }
+
+    #[test]
+    fn from_str_returns_correct_result() {
+        assert_eq!(Version::from_str("16"), Ok(Version::Version10));
+        assert_eq!(Version::from_str("19"), Ok(Version::Version13));
+        assert_eq!(Version::from_str("11"), Err(Error::DecodingFail));
+    }
+
+    #[test]
+    fn from_u32_returns_correct_result() {
+        assert_eq!(Version::from_u32(0x10), Ok(Version::Version10));
+        assert_eq!(Version::from_u32(0x13), Ok(Version::Version13));
+        assert_eq!(Version::from_u32(0), Err(Error::IncorrectVersion));
+    }
+}