🚧 progress: Import existing code.

Author: make-github-pseudonymous-again

package.json

@@ -72,17 +72,25 @@
     "test:module": "IMPORT_MAP_PATH=test/import-maps/dist/index.module.json npm run test-cmd",
     "test:src": "IMPORT_MAP_PATH=test/import-maps/src/index.json npm run test-cmd"
   },
-  "dependencies": {},
+  "dependencies": {
+    "@arithmetic-type/uint32": "^2.0.0",
+    "@arithmetic-type/uint64": "^4.0.0",
+    "@array-like/copy": "^0.0.1",
+    "@failure-abstraction/error": "^6.0.1"
+  },
   "devDependencies": {
-    "@babel/core": "7.19.0",
-    "@babel/plugin-transform-destructuring": "7.18.13",
+    "@array-like/alloc": "0.0.1",
+    "@babel/core": "7.19.3",
+    "@babel/plugin-transform-destructuring": "7.19.4",
     "@babel/plugin-transform-for-of": "7.18.8",
-    "@babel/preset-env": "7.19.0",
+    "@babel/preset-env": "7.19.4",
+    "@codec-bytes/ascii": "3.0.0",
     "@commitlint/cli": "17.1.2",
     "@js-library/commitlint-config": "0.0.4",
     "@node-loader/babel": "2.0.1",
     "@node-loader/core": "2.0.0",
     "@node-loader/import-maps": "1.1.0",
+    "@set-theory/cartesian-product": "2.0.2",
     "ava": "4.3.3",
     "babel-plugin-transform-remove-console": "6.9.4",
     "babel-plugin-unassert": "3.2.0",
@@ -100,8 +108,8 @@
     "np": "7.6.2",
     "pinst": "3.0.0",
     "power-assert": "1.6.1",
-    "regenerator-runtime": "0.13.9",
-    "xo": "0.52.3"
+    "regenerator-runtime": "0.13.10",
+    "xo": "0.52.4"
   },
   "ava": {
     "files": [
@@ -229,6 +237,16 @@
           "doc/**"
         ],
         "env": "browser"
+      },
+      {
+        "files": [
+          "src/**"
+        ],
+        "rules": {
+          "unicorn/filename-case": "off",
+          "no-bitwise": "off",
+          "unicorn/prefer-math-trunc": "off"
+        }
       }
     ]
   }

src/SHA512Hasher.js

@@ -0,0 +1,65 @@
+import {copy} from '@array-like/copy';
+import {NotImplementedError} from '@failure-abstraction/error';
+
+import {sha512InitialState, sha512Call, sha512Finalize} from './sha512.js';
+
+export class SHA512Hasher {
+	constructor() {
+		this._state = sha512InitialState();
+		this._totalBits = 0;
+		this._buffer = new Uint8Array(128);
+		this._bufferBits = 0;
+	}
+
+	update(bytes, offset = 0, length = bytes.length - offset) {
+		if ((this._bufferBits & 0xf_ff) !== 0) {
+			throw new NotImplementedError('Cannot add bytes to bits (for now).');
+		}
+
+		this._totalBits += length << 3;
+
+		const bufferBytes = this._bufferBits >> 3;
+
+		if (bufferBytes > 0) {
+			const bufferComplement = 128 - bufferBytes;
+
+			if (length < bufferComplement) {
+				// Buffer is not full
+				copy(bytes, offset, offset + length, this._buffer, bufferBytes);
+				this._bufferBits += length << 3;
+				return this;
+			}
+
+			// Pad buffer with head of bytes and process it
+			copy(bytes, offset, offset + bufferComplement, this._buffer, bufferBytes);
+			sha512Call(this._state, this._buffer, 0);
+			this._bufferBits = 0;
+			offset += bufferComplement;
+			length -= bufferComplement;
+		}
+
+		const fullBlocks = length >> 7;
+
+		for (let i = 0; i < fullBlocks; ++i) {
+			sha512Call(this._state, bytes, offset);
+			offset += 128;
+			length -= 128;
+		}
+
+		copy(bytes, offset, offset + length, this._buffer, 0);
+		this._bufferBits = length << 3;
+		return this;
+	}
+
+	digest(digest) {
+		return sha512Finalize(
+			this._buffer,
+			this._totalBits,
+			digest,
+			this._bufferBits >> 3,
+			0,
+			this._bufferBits,
+			this._state,
+		);
+	}
+}

src/index.js

@@ -1,2 +1,5 @@
-const answer = 42;
-export default answer;
+export * from './SHA512Hasher.js';
+export * from './sha224.js';
+export * from './sha256.js';
+export * from './sha384.js';
+export * from './sha512.js';