tripcode

Cargo.lock

@@ -211,7 +211,7 @@ dependencies = [
  "crc",
  "futures",
  "getrandom 0.1.16",
- "hex-literal",
+ "hex-literal 0.3.1",
  "hmac",
  "libc",
  "openssl",
@@ -545,12 +545,31 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "hex-literal"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "961de220ec9a91af2e1e5bd80d02109155695e516771762381ef8581317066e0"
+dependencies = [
+ "hex-literal-impl",
+ "proc-macro-hack",
+]
+
 [[package]]
 name = "hex-literal"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5af1f635ef1bc545d78392b136bfe1c9809e029023c84a3638a864a10b8819c8"
 
+[[package]]
+name = "hex-literal-impl"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "853f769599eb31de176303197b7ba4973299c38c7a7604a6bc88c3eef05b9b46"
+dependencies = [
+ "proc-macro-hack",
+]
+
 [[package]]
 name = "hmac"
 version = "0.9.0"
@@ -688,6 +707,20 @@ dependencies = [
  "winapi-build",
 ]
 
+[[package]]
+name = "khash"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "592c0325561e878d43491e8ef0fed4ecb2b84ddbb1d668405914c50400ba1b9e"
+dependencies = [
+ "crc",
+ "getrandom 0.1.16",
+ "hex-literal 0.2.1",
+ "libc",
+ "malloc-array",
+ "sha2",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -709,6 +742,15 @@ dependencies = [
  "cfg-if 0.1.10",
 ]
 
+[[package]]
+name = "malloc-array"
+version = "1.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f994770c7bb3f8f7db7c4160665fc8814c8c705c10ae59a3d7354f0b8838f5c"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.8"
@@ -1828,6 +1870,7 @@ dependencies = [
  "futures",
  "generational-arena",
  "getrandom 0.2.1",
+ "khash",
  "lazy_static",
  "log",
  "mopa",

Cargo.toml

@@ -18,6 +18,7 @@ difference = "2.0.0"
 futures = "0.3.8"
 generational-arena = "0.2.8"
 getrandom = "0.2.1"
+khash = "2.0.0"
 lazy_static = "1.4.0"
 log = "0.4.11"
 mopa = "0.2.2"

src/main.rs

@@ -27,6 +27,7 @@ use color_eyre::{
 mod bytes;
 mod delta; //unused now, but tests still use it, so...
 mod hard_format;
+mod tripcode;
 
 mod post;
 mod state;

src/post.rs

@@ -1,6 +1,9 @@
 use super::*;
 use cryptohelpers::sha256::Sha256Hash;
 
+use hard_format::formats::PEMFormattedString;
+use tripcode::Tripcode;
+
 id_type!(PostID; "A unique post ID");
 
 /// A single completed post
@@ -8,10 +11,14 @@ id_type!(PostID; "A unique post ID");
 pub struct Post
 {
     id: PostID,
+    
     name: Option<String>,
+    tripcode: Option<Tripcode>,
     email: Option<String>,
     
-    body: hard_format::formats::PEMFormattedString,
+    body: PEMFormattedString,
-    signature: Option<hard_format::formats::PEMFormattedString>,
+    signature: Option<PEMFormattedString>,
+
+    /// Hash of the body
     hash: Sha256Hash,
 }

src/tripcode.rs

@@ -0,0 +1,64 @@
+use super::*;
+use khash::ctx::{self, Context};
+use khash::salt::Salt;
+
+use std::fmt;
+
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct Tripcode(String);
+
+lazy_static!{
+    static ref CONTEXT: Context = Context::new(ctx::Algorithm::Sha256Truncated, Salt::internal());
+}
+
+impl Tripcode
+{
+    /// Generate a tripcode from this string.
+    pub fn generate(from: impl AsRef<[u8]>) -> Result<Self, khash::error::Error>
+    {
+	khash::generate(&CONTEXT, from).map(Self)
+    }
+    /// Create a tripcode that *is* this string
+    #[inline] pub fn from_string(string: String) -> Self
+    {
+	Self(string)
+    }
+    /// As a string
+    #[inline] pub fn as_str(&self) -> &str
+    {
+	&self.0
+    }
+}
+
+impl From<Tripcode> for String
+{
+    #[inline] fn from(from: Tripcode) -> Self
+    {
+	from.0
+    }
+}
+
+impl fmt::Display for Tripcode
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
+    {
+	write!(f, "{}", self.0)
+    }
+}
+
+impl AsRef<str> for Tripcode
+{
+    fn as_ref(&self) -> &str
+    {
+	&self.0[..]
+    }
+}
+
+impl std::borrow::Borrow<String> for Tripcode
+{
+    fn borrow(&self) -> &String
+    {
+	&self.0
+    }
+}
+