feat(eddsa-poseidon): adds Blake2s hashing for eddsa and conditional imports

packages/eddsa-poseidon/package.json

@@ -14,6 +14,16 @@
             "types": "./dist/index.d.ts",
             "require": "./dist/index.cjs",
             "default": "./dist/index.js"
+        },
+        "./blake-1": {
+            "types": "./dist/index.d.ts",
+            "require": "./dist/lib.commonjs/eddsa-poseidon-blake-1.cjs",
+            "default": "./dist/esm/eddsa-poseidon-blake-1.js"
+        },
+        "./blake-2b": {
+            "types": "./dist/index.d.ts",
+            "require": "./dist/lib.commonjs/eddsa-poseidon-blake-2b.cjs",
+            "default": "./dist/esm/eddsa-poseidon-blake-2b.js"
         }
     },
     "files": [
@@ -51,6 +61,7 @@
     "dependencies": {
         "@zk-kit/baby-jubjub": "1.0.3",
         "@zk-kit/utils": "1.2.1",
+        "blakejs": "^1.2.1",
         "buffer": "6.0.3"
     }
 }

packages/eddsa-poseidon/rollup.config.ts

@@ -70,5 +70,47 @@ export default [
         input: "src/index.ts",
         output: [{ file: "dist/index.d.ts", format: "es" }],
         plugins: [dts()]
+    },
+    {
+        input: "src/eddsa-poseidon-blake-1.ts",
+        output: [
+            {
+                dir: "./dist/lib.commonjs",
+                format: "cjs",
+                banner,
+                entryFileNames: "[name].cjs"
+            },
+            { dir: "./dist/lib.esm", format: "es", banner }
+        ],
+        external: [
+            ...Object.keys(pkg.dependencies),
+            "@zk-kit/utils/conversions",
+            "@zk-kit/utils/f1-field",
+            "@zk-kit/utils/scalar",
+            "@zk-kit/utils/error-handlers",
+            "@zk-kit/utils/type-checks"
+        ],
+        plugins: [typescript({ tsconfig: "./build.tsconfig.json", declaration: false, declarationDir: undefined })]
+    },
+    {
+        input: "src/eddsa-poseidon-blake-2b.ts",
+        output: [
+            {
+                dir: "./dist/lib.commonjs",
+                format: "cjs",
+                banner,
+                entryFileNames: "[name].cjs"
+            },
+            { dir: "./dist/lib.esm", format: "es", banner }
+        ],
+        external: [
+            ...Object.keys(pkg.dependencies),
+            "@zk-kit/utils/conversions",
+            "@zk-kit/utils/f1-field",
+            "@zk-kit/utils/scalar",
+            "@zk-kit/utils/error-handlers",
+            "@zk-kit/utils/type-checks"
+        ],
+        plugins: [typescript({ tsconfig: "./build.tsconfig.json", declaration: false, declarationDir: undefined })]
     }
 ]

packages/eddsa-poseidon/src/HashFunction.ts

@@ -0,0 +1,6 @@
+import { Buffer } from "buffer"
+
+export interface HashFunction {
+    update(data: Buffer): HashFunction
+    digest(): Buffer
+}

packages/eddsa-poseidon/src/blake.ts

@@ -20,6 +20,7 @@
  */
 
 import { Buffer } from "buffer"
+import { HashFunction } from "./HashFunction"
 
 const zo = Buffer.from([0x01])
 const oo = Buffer.from([0x81])
@@ -156,7 +157,7 @@ function lengthCarry(arr: number[]) {
  * hashing, allowing data to be added in chunks.
  */
 /* eslint-disable import/prefer-default-export */
-export class Blake512 {
+export default class Blake512 implements HashFunction {
     private _h: number[]
     private _s: number[]
     private _block: Buffer

packages/eddsa-poseidon/src/blake2b.ts

@@ -0,0 +1,51 @@
+import { blake2bInit, blake2bUpdate, blake2bFinal, Blake2bCTX } from "blakejs"
+import { HashFunction } from "./HashFunction"
+
+/**
+ * @module Blake2b
+ * Implements the Blake2b cryptographic hash function.
+ * Blake2b is a second iteration of the blake algorithm
+ *
+ * This code is a wrapper around the "blakeJS" JavaScript library.
+ * It supports hashing with optional keys, or output length  for enhanced security in certain contexts.
+ */
+
+export default class Blake2b implements HashFunction {
+    key: Uint8Array | null = null
+    outlen: number = 64
+    context: Blake2bCTX
+    /**
+     * Constructor of the Blake2b engine
+     * @param outlen The fixed output length of the generated hash
+     * @param key Optional key parameter if keyed hashes are required
+     * @returns This instance, to allow method chaining.
+     */
+    constructor(outlen: number = 64, key?: Uint8Array) {
+        if (key) this.key = key
+        if (outlen <= 0 || outlen > 64) throw new Error("Illegal output length, expected 0 < length <= 64")
+        else this.outlen = outlen
+
+        this.context = blake2bInit(this.outlen, key)
+    }
+
+    /**
+     * Updates the hash with new data. This method can be called multiple
+     * times to incrementally add data to the hash computation.
+     * @param input The data to add to the hash.
+     * @returns The instance, to allow method chaining.
+     */
+    update(input: Buffer) {
+        blake2bUpdate(this.context, input)
+        return this
+    }
+
+    /**
+     * Completes the hash computation and returns the final hash value.
+     * This method applies the necessary padding, performs the final compression,
+     * and returns the output.
+     * @returns The Blake2b hash of the input data.
+     */
+    digest() {
+        return Buffer.from(blake2bFinal(this.context))
+    }
+}

packages/eddsa-poseidon/src/eddsa-poseidon-blake-1.ts

@@ -0,0 +1,15 @@
+import { EdDSAPoseidonFactory, SupportedHashingAlgorithms } from "./eddsa-poseidon-factory"
+
+export const {
+    EdDSAPoseidon,
+    derivePublicKey,
+    deriveSecretScalar,
+    packPublicKey,
+    packSignature,
+    signMessage,
+    unpackPublicKey,
+    unpackSignature,
+    verifySignature
+} = EdDSAPoseidonFactory(SupportedHashingAlgorithms.BLAKE1)
+
+export * from "./types"

packages/eddsa-poseidon/src/eddsa-poseidon-blake-2b.ts

@@ -0,0 +1,15 @@
+import { EdDSAPoseidonFactory, SupportedHashingAlgorithms } from "./eddsa-poseidon-factory"
+
+export const {
+    EdDSAPoseidon,
+    derivePublicKey,
+    deriveSecretScalar,
+    packPublicKey,
+    packSignature,
+    signMessage,
+    unpackPublicKey,
+    unpackSignature,
+    verifySignature
+} = EdDSAPoseidonFactory(SupportedHashingAlgorithms.BLAKE2b)
+
+export * from "./types"