bigint-rnd - npm Package Compare versions

Comparing version 1.0.0 to 1.0.1

bigint-rnd.js

 'use strict';
 
-const { randomBytes } = require('crypto');
+var _rbi;
+var _bb;
 
+if (globalThis && globalThis.crypto && globalThis.crypto.getRandomValues) {
+	_rbi = function(bits) {
+		if (bits < 1) {
+			return 0n;
+		}
+		let bytes = bits >> 3;
+		let rest = bits & 7;
+		let mask;
+		if (rest) {
+			mask = 255 >> (8 - rest)
+			bytes++;
+		} else {
+			mask = 255;
+		}
+		let b = globalThis.crypto.getRandomValues(new Uint8Array(bytes));
+		b[0] &= mask;
+		return BigInt('0x' + b.reduce(function(a, x) { return a + x.toString(16).padStart(2, '0'); }, ''));
+	}
+} else {
+	let { randomBytes } = require('crypto');
+	_rbi = function(bits) {
+		if (bits < 1) {
+			return 0n;
+		}
+		let bytes = bits >> 3;
+		let rest = bits & 7;
+		let mask;
+		if (rest) {
+			mask = 255 >> (8 - rest)
+			bytes++;
+		} else {
+			mask = 255;
+		}
+		let b = randomBytes(bytes);
+		b[0] &= mask;
+		return BigInt('0x' + b.toString('hex'));
+	}
+}
+
+const _bigIntBitsCalc = 0;
+
+switch (_bigIntBitsCalc) {
+  case 1:
+	_bb = function(n) {
+		let b = 0;
+		while (n > 0n) {
+			if (n >= 0x10000000000000000000000000000000000000000000000000000000000000000n) {
+				n >>= 256n;
+				b += 256;
+			} else if (n >= 0x100000000000000000000000000000000n) {
+				n >>= 128n;
+				b += 128;
+			} else if (n >= 0x10000000000000000n) {
+				n >>= 64n;
+				b += 64;
+			} else if (n >= 0x100000000n) {
+				n >>= 32n;
+				b += 32;
+			} else if (n >= 0x10000n) {
+				n >>= 16n;
+				b += 16;
+			} else if (n >= 0x100n) {
+				n >>= 8n;
+				b += 8;
+			} else if (n >= 0x10n) {
+				n >>= 4n;
+				b += 4;
+			} else {
+				n >>= 1n;
+				b++;
+			}
+		}
+		return b;
+	}
+	break;
+  case 2:
+	_bb = function(n) {
+		let b = 0;
+		while (n > 0n) {
+			n >>= 1n;
+			b++;
+		}
+		return b;
+	}
+	break;
+  default:
+	_bb = function(n) {
+		if (n < 1n) {
+			return 0;
+		}
+		return n.toString(2).length;
+	}
+	break;
+}
+
+if (1) {
+} else {
+}
+
 function _bigintify(n) {
@@ -34,14 +134,5 @@ switch (typeof(n)) {
 	n--;
-	let r, h = n.toString(16);
-	if (h.length % 2) {
-		h = '0' + h;
-	}
-	let l = h.length / 2, p = 1;
-	for (let m = parseInt('0x' + h.slice(0, 2)); p < m; p = (p << 1) | 1) {
-		/*NOTHING*/
-	}
+	let r, bits = _bb(n);
 	do {
-		let b = randomBytes(l);
-		b[0] &= p;
-		r = BigInt('0x' + b.toString('hex'));
+		r = _rbi(bits);
 	} while(r > n);
@@ -48,0 +139,0 @@ return r;

package.json

 {
 	"name": "bigint-rnd",
-	"version": "1.0.0",
+	"version": "1.0.1",
 	"description": "Unbiased and crytpgraplically safe library for generating random BigInt",
@@ -19,5 +19,8 @@ "main": "bigint-rnd.js",
 	"keywords": [
-		"encryption",
-		"cipher",
-		"bitwise"
+		"crypto",
+		"random",
+		"pseudorandom",
+		"bigint",
+		"secure",
+		"unbiased"
 	],
@@ -24,0 +27,0 @@ "author": {

test/test.js

@@ -53,1 +53,6 @@ 'use strict';
 }
+
+for (let x = bigintRnd(10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000n);
+	 x > 0n;
+	 x = bigintRnd(x)) {
+}

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Improved metrics

Total package byte prevSize

10013

increased by35.18%

Lines of code

186

increased by102.17%

No dependency changes