feat: compatibility for ic-agent

Cargo.toml

@@ -11,7 +11,23 @@ readme = "README.md"
 include = ["src", "Cargo.toml", "LICENSE", "README.md", "NOTICE.txt"]
 
 [dependencies]
+wasm-bindgen = { version = "0.2.67", optional = true }
+
+[dev-dependencies]
+hex-literal = "0.3.4"
 
 [features]
-default = ['std']
-std = []
+default = ['std', 'fallback_separator']
+allow_alt_compress = []
+fallback_separator = []
+std = []
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = ["-Oz", "--enable-mutable-globals"]
+
+[profile.release]
+lto = true
+opt-level = 'z'

src/bls12381/big.rs

@@ -293,7 +293,7 @@ impl BIG {
 
     /* Convert to Hex String */
 //#[cfg(feature = "std")]
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         let mut s = String::new();
         let mut len = self.nbits();

src/bls12381/bls.rs

@@ -71,7 +71,10 @@ fn hash_to_field(hash: usize,hlen: usize ,u: &mut [FP], dst: &[u8],m: &[u8],ctr:
 /* hash a message to an ECP point, using SHA2, random oracle method */
 #[allow(non_snake_case)]
 pub fn bls_hash_to_point(m: &[u8]) -> ECP {
-    let dst= "BLS_SIG_BLS12381G1_XMD:SHA-256_SVDW_RO_NUL_";
+    #[cfg(not(feature = "fallback_separator"))]
+    let dst = "BLS_SIG_BLS12381G1_XMD:SHA-256_SSWU_RO_NUL_";
+    #[cfg(feature = "fallback_separator")]
+    let dst = "BLS_SIG_BLS12381G1_XMD:SHA-256_SVDW_RO_NUL_";
 
     let mut u: [FP; 2] = [
         FP::new(),

src/bls12381/dbig.rs

@@ -292,7 +292,7 @@ impl DBIG {
     }
 
     /* Convert to Hex String */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         let mut s = String::new();
         let mut len = self.nbits();

src/bls12381/ecp.rs

@@ -68,7 +68,7 @@ pub const G2_TABLE:usize=69;
 pub const HTC_ISO:usize=11;
 pub const HTC_ISO_G2:usize=3;
 
-pub const ALLOW_ALT_COMPRESS:bool=false;
+pub const ALLOW_ALT_COMPRESS:bool=cfg!(feature = "allow_alt_compress");
 pub const HASH_TYPE:usize=32;
 pub const AESKEY:usize=16;
 
@@ -505,7 +505,7 @@ impl ECP {
     }
 
     /* convert to hex string */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         let mut W = ECP::new();
         W.copy(self);

src/bls12381/ecp2.rs

@@ -324,7 +324,7 @@ impl ECP2 {
     }
 
     /* convert this to hex string */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         let mut W = ECP2::new();
         W.copy(self);

src/bls12381/fp.rs

@@ -209,7 +209,7 @@ impl FP {
     }
 
     /* convert to string */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         self.redc().tostring()
     }

src/bls12381/fp12.rs

@@ -907,7 +907,7 @@ impl FP12 {
     }
 
     /* output to hex string */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         format!(
             "[{},{},{}]",

src/bls12381/fp2.rs

@@ -449,7 +449,7 @@ impl FP2 {
     }
 
     /* output to hex string */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         format!("[{},{}]", self.a.tostring(), self.b.tostring())
     }

src/bls12381/fp4.rs

@@ -388,7 +388,7 @@ impl FP4 {
     }
 
     /* output to hex string */
-#[cfg(not(feature = "no_std"))]
+#[cfg(feature = "std")]
     pub fn tostring(&self) -> String {
         format!("[{},{}]", self.a.tostring(), self.b.tostring())
     }

src/lib.rs

@@ -17,12 +17,13 @@
  * limitations under the License.
  */
 
-//#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 
 #![allow(clippy::many_single_char_names)]
 #![allow(clippy::needless_range_loop)]
 #![allow(clippy::manual_memcpy)]
 #![allow(clippy::new_without_default)]
+
 pub mod arch;
 pub mod aes;
 pub mod gcm;
@@ -36,3 +37,33 @@ pub mod sha3;
 pub mod nhs;
 pub mod x509;
 pub mod bls12381;
+
+#[cfg(feature = "wasm-bindgen")]
+use wasm_bindgen::prelude::*;
+
+#[cfg(feature = "wasm-bindgen")]
+#[wasm_bindgen]
+pub fn bls_init() -> isize {
+    bls12381::bls::init()
+}
+
+#[cfg(feature = "wasm-bindgen")]
+#[wasm_bindgen]
+pub fn bls_verify(sig: &[u8], m: &[u8], s: &[u8]) -> isize {
+    bls12381::bls::core_verify(sig, m, s)
+}
+
+#[cfg(test)]
+mod tests {
+    #[cfg(all(feature = "allow_alt_compress", not(feature = "fallback_separator")))]
+    #[test]
+    fn bls_verify() {
+        use hex_literal::hex;
+        use crate::bls12381::bls::{core_verify, init, BLS_FAIL, BLS_OK};
+        let pk = hex!("a7623a93cdb56c4d23d99c14216afaab3dfd6d4f9eb3db23d038280b6d5cb2caaee2a19dd92c9df7001dede23bf036bc0f33982dfb41e8fa9b8e96b5dc3e83d55ca4dd146c7eb2e8b6859cb5a5db815db86810b8d12cee1588b5dbf34a4dc9a5");
+        let sig = hex!("b89e13a212c830586eaa9ad53946cd968718ebecc27eda849d9232673dcd4f440e8b5df39bf14a88048c15e16cbcaabe");
+        assert_eq!(init(), BLS_OK);
+        assert_eq!(core_verify(&sig, b"hello".as_ref(), &pk), BLS_OK);
+        assert_eq!(core_verify(&sig, b"hallo".as_ref(), &pk), BLS_FAIL);
+    }
+}